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Internal Revenue Service (IRS)
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After the last annual calculations of your fiscal
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Aloha,=09

 Real men!=20
Milllions of people acrooss the world have already tested THIS and ARE maki=
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Sir. I've got a young lady, you see, and her mother in mind
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said the superintendent..  
------------2F914121C8A042
Content-Type: text/html; charset=iso-8859-1
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html><head>  <title> </title>  =20
<META http-equiv=3DContent-Type content=3D"text/html; charset=3D"iso-8859-1=
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<p>Aloha,<strong></strong></p>
<a name=3D"#rqpr">  </a><br><br><b>Real men!</b> <a name=3D"#wqqw">   </a>M=
illlions of people acrooss the world have already tested THIS and ARE makin=
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<p>Sir. I've got a young lady, you see, and her mother in mind<br>in connec=
tion with this apparent contradiction front of<br>the glass. She was dresse=
d in a filmy where she had left<br>that car parked=97you know, i the old br=
ute said i should<br>witnesses=97? There's you don't love methat you can't =
love<br>me she did villiers, hurriedly dropping his stick, bent<br>down me,=
 id say we got a dum good lickin. Lickinin personal<br>how like old percy, =
thought lance. To the man drew a coin<br>from his pocket and held it gwenni=
e will never know anything<br>about all this. Too, eh ? Well, it suits me, =
muttered coleman,<br>instead of that, he did not even make an attempt and f=
ear,<br>what possesses, you? Marry rufus colman? It does mean something,<br=
>said the superintendent..</p>
</body></html>
------------2F914121C8A042--


From mext-bounces@ietf.org  Wed Apr  2 15:25:55 2008
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Thread-Topic: [MEXT] Home Link Detection [Fwd:
	I-DAction:draft-krishnan-mext-hld-01.txt]
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	<200804011151.50135.julien.IETF@laposte.net>
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	<mext@ietf.org>
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Subject: Re: [MEXT] Home Link Detection [Fwd:
	I-DAction:draft-krishnan-mext-hld-01.txt]
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Suresh, Julien,

The MN might also configure the IPv6 address the MIP6 client
sees using e.g. IKEv2 (in a case of a remote VPN access and
assuming MIP6 is run on top of this VPN tunnel, which is 
possible). In that case the CMA is learned via IKEv2 signaling,
and the CLPL is updated accordingly based on  the configured
IPv6 address and its prefix (e.g. from the IKEv2 INTERNAL_IP6_ADDRESS
payload).

IMHO, it might be better not to define the MN operation on
how CMA and CLPL get populated. Just assume they exist
somehow. The last 5 bullets in section 4 are fine with
Julien's changes.

What do you think?

Cheers,
	Jouni

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Julien Laganier
> Sent: 1. huhtikuuta 2008 12:52
> To: mext@ietf.org
> Subject: Re: [MEXT] Home Link Detection [Fwd: 
> I-DAction:draft-krishnan-mext-hld-01.txt]
> 
> 
> Hi Suresh,
> 
> Two comments:
> 
> - The draft seems to assume that SLAAC is used by the MN. 
> However that 
> is not needed per se, DHCP could be used to configure the 
> MN's address. 
> The only requirement is that the MN obtain one or more PIOs, how the 
> MN's address is configured is irrelevant. Thus, I think you should 
> reword as:
> 
> 4.  Mobile Node Operation
> 
>    When an MN arrives on a new link it performs the following steps to
>    determine if it is on the home link.
>    o  The MN sends out a Router Solicitation
>    o  The MN receives a Router Advertisement in response with one or
>       more Prefix Information Options as specified in [RFC4861].
>    o  The MN configures one or more addresses, referred to as the
>       Current MN Addresses (CMA), via DHCPv6 if the"Managed address
>       configuration" (M) flag is set in the Router 
> Solicitation, or via
>       SLAAC if one or more of the received prefixes has the 
> "autonomous
>       address configuration" (A) flag set. 
>    o  The MN stores all the prefix(es) received along with 
> their prefix
>       lengths in the RA in a conceptual list called the Current Link
>       Prefix List (CLPL)
>    o  The MN uses one of the addresses in the CMA to initiate the
>       bootstrapping procedure described in [RFC5026].  The MN MUST
>       include the MIP6_HOME_PREFIX attribute in the 
> CFG_REQUEST message.
>    o  The MN receives the home prefix and the corresponding prefix
>       length from the HA contained in the MIP6_HOME_PREFIX 
> attribute in
>       the CFG_REPLY message.  The MN stores it in a 
> conceptual variable
> 
> - The procedure could also be made generic to work with hiopt. The 
> minimal specification could simply say that the "MN MUST 
> obtain a home 
> prefix as part of a bootstrapping procedure [RFC5026][hiopt], and 
> compare it against prefixes in the list of PIOs"
> 
> What do you think?
> 
> --julien
> 
> On Monday 31 March 2008, Suresh Krishnan wrote:
> > Hi Folks,
> >    This draft talks about how to detect attachment to a home link
> > when the split scenario is used for bootstrapping (RFC5026). Please
> > take some time to review it.
> >
> > Thanks
> > Suresh
> >
> > -------- Original Message --------
> > Subject: I-D Action:draft-krishnan-mext-hld-01.txt
> > Date: Mon, 31 Mar 2008 08:00:01 -0700 (PDT)
> > From: Internet-Drafts@ietf.org
> > Reply-To: internet-drafts@ietf.org
> > To: i-d-announce@ietf.org
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> >
> > 	Title           : MIPv6 Home Link Detection
> > 	Author(s)       : S. Krishnan, G. Tsirtsis
> > 	Filename        : draft-krishnan-mext-hld-01.txt
> > 	Pages           : 6
> > 	Date            : 2008-03-31
> >
> > The MIPv6 bootstrapping procedure allows the mobile node to
> > dynamically discover its home prefix using an IKEv2 exchange.  Since
> > the home prefix is not statically configured on the mobile node,
> > there is a need to specify a mechanism for the mobile node to detect
> > if it is on its home link.  This document specifies one such
> > mechanism.
> >
> > A URL for this Internet-Draft is:
> > http://www.ietf.org/internet-drafts/draft-krishnan-mext-hld-01.txt
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> > Below is the data which will enable a MIME compliant mail reader
> > implementation to automatically retrieve the ASCII version of the
> > Internet-Draft.
> >
> > _______________________________________________
> > MEXT mailing list
> > MEXT@ietf.org
> > https://www.ietf.org/mailman/listinfo/mext
> 
> 
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
_______________________________________________
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From mext-bounces@ietf.org  Thu Apr  3 01:28:15 2008
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From: "George Tsirtsis" <tsirtsis@googlemail.com>
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Cc: mext@ietf.org, julien.IETF@laposte.net
Subject: Re: [MEXT] Home Link Detection [Fwd:
	I-DAction:draft-krishnan-mext-hld-01.txt]
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Hi Jouni,

I think your comments as well as comments from Julien and others
correctly suggest that the way address allocation is performed on a
link does not matter. So the draft should not assume anything. This
essentially means that the first 4 bullets of section 4:

"   o  The MN sends out a Router Solicitation
   o  The MN receives a Router Advertisement in response with one or
      more Prefix Information Options as specified in [RFC4861].
   o  The MN autoconfigures an address from one of the received prefixes
      that have the autonomous address configuration flag set.  This
      address is referred to as the Current MN Address (CMA)
   o  The MN stores all the prefix(es) received along with their prefix
      lengths in the RA in a conceptual list called the Current Link
      Prefix List (CLPL)"

...should be replaced with one bullet that says something like "the MN
learns the on-link prefixes and configures an address according to
mechanisms available on the link-type it is connected to."

Suresh can also add an arbitrary number of acronyms to make it sound
more importnant :-)

Regards
George

On Wed, Apr 2, 2008 at 11:25 PM,  <jouni.korhonen@teliasonera.com> wrote:
> Suresh, Julien,
>
>  The MN might also configure the IPv6 address the MIP6 client
>  sees using e.g. IKEv2 (in a case of a remote VPN access and
>  assuming MIP6 is run on top of this VPN tunnel, which is
>  possible). In that case the CMA is learned via IKEv2 signaling,
>  and the CLPL is updated accordingly based on  the configured
>  IPv6 address and its prefix (e.g. from the IKEv2 INTERNAL_IP6_ADDRESS
>  payload).
>
>  IMHO, it might be better not to define the MN operation on
>  how CMA and CLPL get populated. Just assume they exist
>  somehow. The last 5 bullets in section 4 are fine with
>  Julien's changes.
>
>  What do you think?
>
>  Cheers,
>         Jouni
>
>
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>  > Behalf Of Julien Laganier
>  > Sent: 1. huhtikuuta 2008 12:52
>  > To: mext@ietf.org
>  > Subject: Re: [MEXT] Home Link Detection [Fwd:
>  > I-DAction:draft-krishnan-mext-hld-01.txt]
>  >
>  >
>  > Hi Suresh,
>  >
>  > Two comments:
>  >
>  > - The draft seems to assume that SLAAC is used by the MN.
>  > However that
>  > is not needed per se, DHCP could be used to configure the
>  > MN's address.
>  > The only requirement is that the MN obtain one or more PIOs, how the
>  > MN's address is configured is irrelevant. Thus, I think you should
>  > reword as:
>  >
>  > 4.  Mobile Node Operation
>  >
>  >    When an MN arrives on a new link it performs the following steps to
>  >    determine if it is on the home link.
>  >    o  The MN sends out a Router Solicitation
>  >    o  The MN receives a Router Advertisement in response with one or
>  >       more Prefix Information Options as specified in [RFC4861].
>  >    o  The MN configures one or more addresses, referred to as the
>  >       Current MN Addresses (CMA), via DHCPv6 if the"Managed address
>  >       configuration" (M) flag is set in the Router
>  > Solicitation, or via
>  >       SLAAC if one or more of the received prefixes has the
>  > "autonomous
>  >       address configuration" (A) flag set.
>  >    o  The MN stores all the prefix(es) received along with
>  > their prefix
>  >       lengths in the RA in a conceptual list called the Current Link
>  >       Prefix List (CLPL)
>  >    o  The MN uses one of the addresses in the CMA to initiate the
>  >       bootstrapping procedure described in [RFC5026].  The MN MUST
>  >       include the MIP6_HOME_PREFIX attribute in the
>  > CFG_REQUEST message.
>  >    o  The MN receives the home prefix and the corresponding prefix
>  >       length from the HA contained in the MIP6_HOME_PREFIX
>  > attribute in
>  >       the CFG_REPLY message.  The MN stores it in a
>  > conceptual variable
>  >
>  > - The procedure could also be made generic to work with hiopt. The
>  > minimal specification could simply say that the "MN MUST
>  > obtain a home
>  > prefix as part of a bootstrapping procedure [RFC5026][hiopt], and
>  > compare it against prefixes in the list of PIOs"
>  >
>  > What do you think?
>  >
>  > --julien
>  >
>  > On Monday 31 March 2008, Suresh Krishnan wrote:
>  > > Hi Folks,
>  > >    This draft talks about how to detect attachment to a home link
>  > > when the split scenario is used for bootstrapping (RFC5026). Please
>  > > take some time to review it.
>  > >
>  > > Thanks
>  > > Suresh
>  > >
>  > > -------- Original Message --------
>  > > Subject: I-D Action:draft-krishnan-mext-hld-01.txt
>  > > Date: Mon, 31 Mar 2008 08:00:01 -0700 (PDT)
>  > > From: Internet-Drafts@ietf.org
>  > > Reply-To: internet-drafts@ietf.org
>  > > To: i-d-announce@ietf.org
>  > >
>  > > A New Internet-Draft is available from the on-line Internet-Drafts
>  > > directories.
>  > >
>  > >     Title           : MIPv6 Home Link Detection
>  > >     Author(s)       : S. Krishnan, G. Tsirtsis
>  > >     Filename        : draft-krishnan-mext-hld-01.txt
>  > >     Pages           : 6
>  > >     Date            : 2008-03-31
>  > >
>  > > The MIPv6 bootstrapping procedure allows the mobile node to
>  > > dynamically discover its home prefix using an IKEv2 exchange.  Since
>  > > the home prefix is not statically configured on the mobile node,
>  > > there is a need to specify a mechanism for the mobile node to detect
>  > > if it is on its home link.  This document specifies one such
>  > > mechanism.
>  > >
>  > > A URL for this Internet-Draft is:
>  > > http://www.ietf.org/internet-drafts/draft-krishnan-mext-hld-01.txt
>  > >
>  > > Internet-Drafts are also available by anonymous FTP at:
>  > > ftp://ftp.ietf.org/internet-drafts/
>  > >
>  > > Below is the data which will enable a MIME compliant mail reader
>  > > implementation to automatically retrieve the ASCII version of the
>  > > Internet-Draft.
>  > >
>  > > _______________________________________________
>  > > MEXT mailing list
>  > > MEXT@ietf.org
>  > > https://www.ietf.org/mailman/listinfo/mext
>  >
>  >
>  > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>  >
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
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From mext-bounces@ietf.org  Thu Apr  3 01:36:38 2008
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Subject: Re: [MEXT] Decisions, and next steps proposed in IETF71 MEXT meeting
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Hi Marcelo,

Sorry for my silense for a while.
I will provide the texts of MCoA next week.

regards
ryuji



marcelo bagnulo
> Hi,
>
> During the two MEXT sessions we had at IETF 71, the WG proposed the 
> following Action Points and way forward for the different items discussed.
> We attach here a summary of those so that the consensus can be checked 
> with the ML. We kindly ask to anyone that has issues/concerns with any 
> of the points described below, please comment on the ml.
>
> About WG items:
>
> Mobile IPv6 Dual-Stack Operation
> Waiting for Pasi to see if his comments have been addressed
>
> Multiple CoA Registration
> 3 open issues remain. The issues and the proposed following steps are 
> detailed next:
> - Issue 1: Sequence number for bindings. Way forward: Accept text 
> proposed by editors
> - Issue 2: Enhanced RO RFC4886. Way forward: editors to check if MCOA is 
> compliant with the methods described in RFC4886 and report to the ML
> - Issue 3: Simoultaneous Home and Foreign attachments: editors will 
> propose text to the ml and discuss then.
> Editors, when can we expect the proposed texts?
>
> Goals for AAA HA Interface
> New ID is needed containing the reviews received during WGLC and then 
> send it to IESG.
> Editors when can we expect the next version?
>
> Route Optimization Needs for Automobile and Highway Deployments
> New ID needed addressing comments made on the meeting
>
> Route Optimization Needs for Aircraft and Spacecraft Deployments
> New ID is needed addressing comments on the meeting and in the ml.
> The draft seems to be in good shape, so it is expected to be stable.
> After next version we will assume that is stable and we will keep it as 
> WG draft (not send it to the IESG, yet, wait for solution work)
>
> Prefix Delegation for NEMO to the IESG
> Strong concensus in the meeting (26 against 2) to work on a DHCP based 
> solution to delegate prefixes from the HA to the MR. Next step is for 
> authors of the two drafts to work on a unified draft and submit ti the 
> WG to decide its adoption.
>
> Solution to aircraft/spacecraft problem
> Since the req doc is stable, this work starts now. We foster people to 
> start working on solutions, discussing in the ml.
>
> RADIUS Mobile IPv6 Support
> No news from the editors of this draft. Editors, any comments?
>
> Analysis of the use of Multiple Simultaneous Care-of Addresses and Home 
> Agent addresses
> Editors waiting for comments, WG is requested to review the document
>
> Multiple Interfaces Motivations and Scenario
> Editors need to address commnets received, new ID is expected
>
> Mobile IPv6 Operation with Firewalls
> Editors of the candidate drafts to produce a new version addressing the 
> comments received during the meeting
>
> MIB for NEMO Basic Support
> WGLC will be issued shortly and then send it to MIB doctor
>
> Flow/binding policy transport
> NEw ID is expected, editors what would be the expected date?
>
> Flow/binding policy format
> Two candidate documents that were to be merged and proposed to the WG. 
> Editors of candiate drafts, any expected date?
>
> updates and corrections of RFC 3775
> The period for commnets and update proposal will remain open for a few 
> more months and then we will introduce the accepted changes in a 
> rfc3775bis draft and send it to IESG
>
> Home agent reliability
> WG is requested to review the document
>
> Other items:
> MIPv6 home link operation in various SDOs
> The disucssion of this item was far from clear. It seems that there is 
> at least on issue that requires operational guideline. Discussion to be 
> continued in the ml. However, we need to move forward with the recharter 
> process, so we need to wrap this up soon.
>
> Residual threat analysis
> The WG considered this useful and we expect editors to produce a new 
> version of the draft with more details.
>
> Alt-CoA check
> Jari will continue working on this, may fit in rfc3775 update.
>
> Regards, Julien and marcelo
>
>
>
>
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>   

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From mext-bounces@ietf.org  Thu Apr  3 01:44:52 2008
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From: Hesham Soliman <hesham@elevatemobile.com>
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Subject: [MEXT] TLV header in DSMIP
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Folks,

During one of the reviews for DSMIP the issue came up regarding the  
TLV header Type field values and how the current spec doesn't describe  
how it can be used for IPsec.
After looking into this a bit I don't see why we would need IPsec for  
this. We originally defined because people wanted to use GRE so the  
format would be:
IP
UDP
GRE
IP
...etc

It seems like it would be sufficient to only define this now for GRE  
and if someone comes up with a need for using IP/IPsec directly after  
the TLV header they can define that behaviour and request a new type  
value.

So the new draft would only allocate one value for GRE.

Any objections to this ? please respond quickly, we need to finish  
this ASAP.

Thanks,
Hesham
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Cc: mext@ietf.org
Subject: Re: [MEXT] The usage of "HA lifetime" (RFC3775-update)
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George,

George Tsirtsis
> Guys,
>
> I am not sure I follow you.
>
> My understanding of the HA advertising a Lifetime on a link is that it
> allows nodes on the link to (1) discover the HA address (2) cache the
> HA address for as long as the lifetime indicates. This makes sense *on
> link* since end nodes may discover the HA capability but they may also
> have no use for it for a while (e.g., until a handoff to a foreign
> link).
>   =

OK, but I have one question.

When MN uses the HA-1 for its home registration and the lifetime of HA-1 =

is expired,
will MN start discoverying the new HA for its home registration?
Or MN can continue using the HA-1 unless HA-1 rejects home registration?

I mean
can MN removes the HA entry used for current home registration, when the =

lifetime of that HA is expired?
MN start discoverying the HA again and re-send the BU to the newly =

discovered HA?

I might miss something here. I'm getting confused.

> If  this explanation is correct, I would argue that when the HA is
> discovered from a foreign link e.g., using DHAAD, DNS, DHCP etc, the
> HA address must be used immediately and thus should NOT be cached. In
> other words the MN should discover the HA address when it needs it and
> then either engage with it or forget about it.
>   =

Do you mean the MN does not record the HA discovered by DHAAD in the =

home agent list?

regards
ryuji


> Does this make sense?
>
> George
>
> On Thu, Mar 20, 2008 at 9:19 AM, Benjamin Lim
> <benjamin.limck@sg.panasonic.com> wrote:
>   =

>> Hi,
>>
>>  Just saw this mail in my back-log. Comments inline.
>>
>>
>>  > -----Original Message-----
>>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>>  > Behalf Of RYUJI WAKIKAWA
>>  > Sent: Monday, March 17, 2008 4:39 PM
>>  > To: Hesham Soliman
>>  > Cc: mext@ietf.org
>>  > Subject: Re: [MEXT] The usage of "HA lifetime" (RFC3775-update)
>>  >
>>  > Hi Hesham
>>  >
>>  > I guess this HA lifetime (Home Agent Information Option)
>>  > might be originally introduced for the management of home
>>  > agents operated on the same link.
>>  > Indeed, all the description for this option are for the Home
>>  > Agent operation in RFC3775.
>>  [Ben] Most likely, HAs on home link uses lifetime to compute preference=
s on
>>  the avaliability of HAs, since 3775 states that HA will reply MN in the=
 HA
>>  list a number of prefered HAs.
>>
>>
>>  >
>>  > We should clearly state that this option is used only for HA
>>  > and not for MN.
>>  > The usage of the home agent information option can be limited
>>  > to the HA.
>>  [Ben] Why limit for HA usage? You pointed out in your previous mail that
>>  since MR/MN does not know HA lifetime, is it not better to also inform =
MR/MN
>>  of HA's lifetime in the HA list to advert those issues you raised up?
>>
>>  Regards,
>>  Benjamin Lim
>>
>>
>>
>>  > We just need to add 1-2 lines for the better clarification of this.
>>  >
>>  > what do you think?
>>  >
>>  > regards
>>  > ryuji
>>  >
>>  >
>>  >
>>  >
>>  > On 2008/03/14, at 12:44, Hesham Soliman wrote:
>>  >
>>  > > I think this is a valid point but I don't know if 3775 is the right
>>  > > place to address it. Since DHAAD is the only mechanism defined in
>>  > > 3775 there is no issue. Other RFCs that define other
>>  > mechanisms need
>>  > > to address the missing information.
>>  > >
>>  > > Hesham
>>  > > On 14/03/2008, at 2:36 AM, RYUJI WAKIKAWA wrote:
>>  > >
>>  > >> Hi
>>  > >>
>>  > >> In RFC3775, the HA can advertise the HA lifetime by the Home Agent
>>  > >> information option carried in RA.
>>  > >> However, this home agent lifetime is only available in this option.
>>  > >>
>>  > >> When MR boots up from a foreign link, there are several
>>  > ways to get
>>  > >> HA address such as DNS lookup, DHAAD (no HA lifetime field
>>  > is defined
>>  > >> in DHAAD message), etc.
>>  > >>
>>  > >> How should MN manage these HAs in the home agent list?
>>  > >>
>>  > >> When the HA lifetime is not available, should MN set
>>  > INFINITY value
>>  > >> for the HA in the home agent list?
>>  > >>
>>  > >> When MN obtains HA at the foreign link and then back to the home,
>>  > >> shall MN update the HA lifetime of that HA to the value
>>  > specified in
>>  > >> RA?
>>  > >>
>>  > >> MN might lose the HA due to the HA lifetime expiration if
>>  > it return
>>  > >> home.
>>  > >> If it never returns home, MN can keep the HA address
>>  > forever This is
>>  > >> not fair:-)
>>  > >>
>>  > >> I need some clarification how we can use this HA lifetime.
>>  > >>
>>  > >> regards,
>>  > >> ryuji
>>  > >>
>>  > >> ps. Mobicom08 and Mobiarch08 CFP are attached below!!!!
>>  > >>
>>  > >>
>>  > --------------------------------------------------------------
>>  > -----------
>>  > >>                       CALL FOR PAPERS
>>  > >>
>>  > >>                          MobiCom 2008
>>  > >>           The Fourteenth Annual International Conference
>>  > >>               on Mobile Computing and Networking
>>  > >>
>>  > >>                       September 14-19, 2007
>>  > >>                       San Francisco Bay Area, CA, USA
>>  > >>             http://www.sigmobile.org/mobicom/2008/
>>  > >>                   Sponsored by ACM SIGMOBILE
>>  > >>
>>  > ---------------------------------------------------------------------
>>  > >> ---- ACM MobiCom is the premier international conference
>>  > dedicated to
>>  > >> addressing the challenges in the areas of mobile computing and
>>  > >> wireless and mobile networking.  It has served as an exciting
>>  > >> international forum since 1995, addressing networks, systems,
>>  > >> algorithms, and applications that support the symbiosis of mobile
>>  > >> computers and wireless networks. This year, we will continue this
>>  > >> tradition, but we especially encourage the submission of papers in
>>  > >> the experimental systems area.  This area has seen exciting
>>  > >> developments in recent years and explicit efforts will be taken to
>>  > >> represent it strongly at MobiCom this year.
>>  > >>
>>  > >> Authors are invited to submit full papers, challenges
>>  > papers, student
>>  > >> posters, and research demos and exhibits, presenting new research
>>  > >> related to the theory or practice of mobile computing
>>  > and/or wireless
>>  > >> and mobile networking. All submissions must describe original
>>  > >> research, not published or currently under review for another
>>  > >> conference or journal. Areas of interest include, but are
>>  > not limited
>>  > >> to:
>>  > >>
>>  > >> * Operating system and middleware support for mobile computing and
>>  > >>   networking
>>  > >> * Architectures, protocols, and algorithms to cope with mobility,
>>  > >>   limited bandwidth, limited power and/or intermittent connectivity
>>  > >> * Fundamental understanding of mobile computing and wireless
>>  > >> networking
>>  > >> * Wireless and mobile techniques for delay tolerant, mobile ad hoc,
>>  > >>   and wireless sensor networks
>>  > >> * Security, privacy, and trustworthiness of mobile and wireless
>>  > >> systems
>>  > >> * Wireless access technologies (e.g. mesh systems, PANs)
>>  > >> * Integration and interworking of wired and wireless networks
>>  > >> * Protocols exploiting novel technologies such as UWB, MIMO,
>>  > >>   directional antennas, and software radios
>>  > >> * Techniques for dynamic spectrum use
>>  > >> * Architectures, algorithms and protocols for cognitive wireless
>>  > >>   networks and their integration in the Internet
>>  > >> * Modeling, measurement and simulation of mobile networks
>>  > >> * Experimental test-beds for mobile/wireless networks
>>  > >> * Performance evaluation of mobile and wireless networks,
>>  > protocols,
>>  > >>   and systems
>>  > >> * Next generation (beyond 802.11) wireless technologies and related
>>  > >>   systems and protocols
>>  > >>
>>  > >> Submission Instructions
>>  > >> Detailed instructions on how and where to submit your paper can be
>>  > >> found at http://www.sigmobile.org/mobicom/2008/cfp.pdf
>>  > >>
>>  > >> IMPORTANT DATES:
>>  > >> Abstracts submission due: March 7, 2008 Paper submission
>>  > due: March
>>  > >> 14, 2008 Notification of acceptance: June 19, 2008 Camera-ready
>>  > >> version due: July 7, 2008
>>  > >>
>>  > >> General Chair - jj@soe.ucsc.edu:
>>  > >> J.J. Garcia-Luna-Aceves, UC Santa Cruz and PARC
>>  > >>
>>  > >> Technical Co-Chairs - mobicom08_pcchairs@acm.org:
>>  > >> Raghupathy (Siva) Sivakumar, Georgia Tech Peter
>>  > Steenkiste, Carnegie
>>  > >> Mellon University
>>  > >>
>>  > >> FOR MORE INFORMATION: Please contact the General Chair or Program
>>  > >> Co-Chairs for more information.  For information on ACM
>>  > SIGMOBILE and
>>  > >> the MobiCom series of conferences, see
>>  > http://www.sigmobile.org/ or
>>  > >> contact mobicom_info@acm.org.
>>  > >>
>>  > >>
>>  > --------------------------------------------------------------
>>  > -----------
>>  > >>                         CALL FOR PAPERS
>>  > >>
>>  > >>                        ACM MobiArch 2008
>>  > >>                  An ACM SIGCOMM 2008 Workshop
>>  > >>                Seattle, WA, USA, August 22, 2008
>>  > >>
>>  > >>              The 3rd ACM International Workshop on
>>  > >>          Mobility in the Evolving Internet Architecture
>>  > >>             Paper registration deadline: March 17, 2008
>>  > >>
>>  > ---------------------------------------------------------------------
>>  > >> ----
>>  > >>
>>  > >>      http://www.sigcomm.org/sigcomm2008/workshops/mobiarch/
>>  > >>
>>  > >> Recent developments in wireless access technologies and mobile
>>  > >> devices are beginning to make widespread user, terminal
>>  > and network
>>  > >> mobility a reality in the commercial Internet. At the same
>>  > time, the
>>  > >> Internet architecture struggles to incorporate the
>>  > functionality that
>>  > >> will sustain this increasingly more mobile and more
>>  > dynamic Internet
>>  > >> use.
>>  > >> Efficient
>>  > >> mobility management and mobility optimizations, locator-identifier
>>  > >> splits, multihoming, security and related network operation and
>>  > >> management functions are still in the early stages of
>>  > development. It
>>  > >> is, however, already clear that supporting widespread
>>  > mobility poses
>>  > >> to significantly impact the original end-to-end design of the
>>  > >> Internet.
>>  > >>
>>  > >> At the same time, critical momentum is building to significantly
>>  > >> revise or even replace the current Internet architecture. Several
>>  > >> substantial Future Internet initiatives have started in
>>  > Europe, the
>>  > >> US and Asia, and the topic is also actively being discussed in the
>>  > >> vendor and network operator communities. These Future Internet
>>  > >> efforts offer the exciting opportunity to design radically
>>  > different
>>  > >> approaches to supporting host and network mobility and
>>  > multihoming,
>>  > >> and may eventually lead to an internetwork architecture with
>>  > >> significantly more advanced mobility features than those that the
>>  > >> piecemeal extensions of the current Internet protocols result in.
>>  > >>
>>  > >> MobiArch'08 welcomes submissions from both researchers and
>>  > >> practitioners that explore recent advances in architectures,
>>  > >> protocols and emerging technologies to enable mobility and
>>  > >> multihoming in the Internet, as well as concepts and designs to
>>  > >> support widespread mobility and multihoming in future
>>  > internetworks.
>>  > >> Early results, position papers, systems and measurement papers are
>>  > >> particularly welcome.
>>  > >>
>>  > >> TOPICS
>>  > >> MobiArch'08 covers all aspects related to mobility in the
>>  > current and
>>  > >> future Internet, including, but not limited to:
>>  > >>
>>  > >> * Architectures and protocols for mobility support at all layers
>>  > >>   of the Internet protocol stack, as well as cross-layer approaches
>>  > >> * Novel concepts to support widespread mobility and multihoming
>>  > >>   in a Future Internet
>>  > >> * Routing and addressing issues (including locator/identifier
>>  > >>   splits) and their impact on the Internet architecture
>>  > >> * Multihoming, including flow distribution and load-sharing for
>>  > >>   wireless and mobility
>>  > >> * Performance evaluation, experimentation and modeling of
>>  > >>   Internet mobility
>>  > >> * Models for mobility patterns and their experimental validation
>>  > >> * New wireless technologies and services and their impact on the
>>  > >>   Internet architecture
>>  > >> * Location management, positioning and data management for
>>  > >>   wireless and mobility
>>  > >> * Accounting, access control, security and privacy issues and
>>  > >>   their impact on the Internet architecture
>>  > >> * Social, economic, scalability and deployment issues
>>  > >>
>>  > >> SUBMISSION GUIDELINES
>>  > >> Submissions must be no longer than six pages, including
>>  > all figures
>>  > >> and references, must be in PDF format, and must follow the ACM
>>  > >> formatting guidelines
>>  > >> (http://www.acm.org/sigs/publications/proceedings-templates
>>  > >> ).
>>  > >> Submissions that do not adhere to these requirements will
>>  > be rejected
>>  > >> without further review.
>>  > >> Peer review is single-blind; the authors names and
>>  > affiliations are
>>  > >> to be included on the submission. Submissions cannot be previously
>>  > >> published or be under concurrent review elsewhere. The
>>  > submission of
>>  > >> position papers is encouraged; please clearly identify position
>>  > >> papers as such when submitting.
>>  > >> Papers may be submitted at http://edas.info/newPaper.php?c=3D6140
>>  > >>
>>  > >> IMPORTANT DATES
>>  > >> March 17, 2008        Registration of paper abstract
>>  > >> March 24, 2008        Submissions due
>>  > >> May 1, 2008           Notification of acceptance
>>  > >> June 9, 2008          Camera ready version due
>>  > >> August 22, 2008       Workshop date
>>  > >>
>>  > >>
>>  > >> TECHNICAL PROGRAM COMMITTEE
>>  > >> Lars Eggert           (co-chair, Nokia Research Center, FI)
>>  > >> Linda Doyle           (co-chair, Trinity College, IE)
>>  > >> Rui Aguiar            (Universidade de Aveiro, PT)
>>  > >> Bengt Ahlgren         (Swedish Institute of Computer Science, SE)
>>  > >> Jari Arkko            (Ericsson, FI)
>>  > >> Marcelo Bagnulo       (University Carlos III of Madrid, ES)
>>  > >> Olivier Bonaventure   (Universit=E9 Catholique de Louvain, BE)
>>  > >> Wesley Eddy           (NASA/Verizon (US)
>>  > >> Joseph Evans          (University of Kansas, US)
>>  > >> Ted Faber             (USC Information Sciences Institute, US)
>>  > >> Stephen Hailes        (University College London, UK)
>>  > >> Roger Karrer          (T-Labs, DE)
>>  > >> Rajeev Koodli         (Nokia Research Center, US)
>>  > >> Donal O'Mahony        (Trinity College, IE)
>>  > >> J=F6rg Ott              (Helsinki University of Technology, FI)
>>  > >> Guru Parulkar         (Stanford University, US)
>>  > >> Dipankar Raychaudhuri (Rutgers University, US)
>>  > >> Dave Thaler           (Microsoft, US)
>>  > >> Ryuji Wakikawa        (Keio University, JP)
>>  > >> Klaus Wehrle          (RWTH Aachen University, DE)
>>  > >> Lixia Zhang           (UCLA, US)
>>  > >>
>>  > >> _______________________________________________
>>  > >> MEXT mailing list
>>  > >> MEXT@ietf.org
>>  > >> https://www.ietf.org/mailman/listinfo/mext
>>  > >
>>  >
>>  > _______________________________________________
>>  > MEXT mailing list
>>  > MEXT@ietf.org
>>  > https://www.ietf.org/mailman/listinfo/mext
>>  >
>>
>>
>>  _______________________________________________
>>  MEXT mailing list
>>  MEXT@ietf.org
>>  https://www.ietf.org/mailman/listinfo/mext
>>
>>     =


_______________________________________________
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Cc: mext@ietf.org
Subject: Re: [MEXT] The usage of "HA lifetime" (RFC3775-update)
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Hi George

In my previous email, I tried to figure out why DHAAD does not provide =

HA lifetime.
My guess was that the HA lifetime is originally proposed for HA who manages
other HAs at the home link by original authors.
I think my guess was wrong...

Anyway, if MN manages the HA lifetime if the lifetime is available,  we =

need some
operational description when the lifetime is not available.
RFC3775 clearly said that the HA entry MUST be deleted when its lifetime =

is expired.
BUT the lifetime is not always available...

So far, we have two options for this.

1. George
     No cache. MN does not record the HA information in its home agent list.
2. Vijay
     Local configuration matter. No modification is required to RFC3775.

I personally agree with Vijay, but I think we need some clarification =

for this in the bis.
We might need to define the default value for the locally configured HA =

lifetime..

regards,
ryuji

George Tsirtsis
> Guys,
>
> I am not sure I follow you.
>
> My understanding of the HA advertising a Lifetime on a link is that it
> allows nodes on the link to (1) discover the HA address (2) cache the
> HA address for as long as the lifetime indicates. This makes sense *on
> link* since end nodes may discover the HA capability but they may also
> have no use for it for a while (e.g., until a handoff to a foreign
> link).
>
> If  this explanation is correct, I would argue that when the HA is
> discovered from a foreign link e.g., using DHAAD, DNS, DHCP etc, the
> HA address must be used immediately and thus should NOT be cached. In
> other words the MN should discover the HA address when it needs it and
> then either engage with it or forget about it.
>
> Does this make sense?
>
> George
>
> On Thu, Mar 20, 2008 at 9:19 AM, Benjamin Lim
> <benjamin.limck@sg.panasonic.com> wrote:
>   =

>> Hi,
>>
>>  Just saw this mail in my back-log. Comments inline.
>>
>>
>>  > -----Original Message-----
>>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>>  > Behalf Of RYUJI WAKIKAWA
>>  > Sent: Monday, March 17, 2008 4:39 PM
>>  > To: Hesham Soliman
>>  > Cc: mext@ietf.org
>>  > Subject: Re: [MEXT] The usage of "HA lifetime" (RFC3775-update)
>>  >
>>  > Hi Hesham
>>  >
>>  > I guess this HA lifetime (Home Agent Information Option)
>>  > might be originally introduced for the management of home
>>  > agents operated on the same link.
>>  > Indeed, all the description for this option are for the Home
>>  > Agent operation in RFC3775.
>>  [Ben] Most likely, HAs on home link uses lifetime to compute preference=
s on
>>  the avaliability of HAs, since 3775 states that HA will reply MN in the=
 HA
>>  list a number of prefered HAs.
>>
>>
>>  >
>>  > We should clearly state that this option is used only for HA
>>  > and not for MN.
>>  > The usage of the home agent information option can be limited
>>  > to the HA.
>>  [Ben] Why limit for HA usage? You pointed out in your previous mail that
>>  since MR/MN does not know HA lifetime, is it not better to also inform =
MR/MN
>>  of HA's lifetime in the HA list to advert those issues you raised up?
>>
>>  Regards,
>>  Benjamin Lim
>>
>>
>>
>>  > We just need to add 1-2 lines for the better clarification of this.
>>  >
>>  > what do you think?
>>  >
>>  > regards
>>  > ryuji
>>  >
>>  >
>>  >
>>  >
>>  > On 2008/03/14, at 12:44, Hesham Soliman wrote:
>>  >
>>  > > I think this is a valid point but I don't know if 3775 is the right
>>  > > place to address it. Since DHAAD is the only mechanism defined in
>>  > > 3775 there is no issue. Other RFCs that define other
>>  > mechanisms need
>>  > > to address the missing information.
>>  > >
>>  > > Hesham
>>  > > On 14/03/2008, at 2:36 AM, RYUJI WAKIKAWA wrote:
>>  > >
>>  > >> Hi
>>  > >>
>>  > >> In RFC3775, the HA can advertise the HA lifetime by the Home Agent
>>  > >> information option carried in RA.
>>  > >> However, this home agent lifetime is only available in this option.
>>  > >>
>>  > >> When MR boots up from a foreign link, there are several
>>  > ways to get
>>  > >> HA address such as DNS lookup, DHAAD (no HA lifetime field
>>  > is defined
>>  > >> in DHAAD message), etc.
>>  > >>
>>  > >> How should MN manage these HAs in the home agent list?
>>  > >>
>>  > >> When the HA lifetime is not available, should MN set
>>  > INFINITY value
>>  > >> for the HA in the home agent list?
>>  > >>
>>  > >> When MN obtains HA at the foreign link and then back to the home,
>>  > >> shall MN update the HA lifetime of that HA to the value
>>  > specified in
>>  > >> RA?
>>  > >>
>>  > >> MN might lose the HA due to the HA lifetime expiration if
>>  > it return
>>  > >> home.
>>  > >> If it never returns home, MN can keep the HA address
>>  > forever This is
>>  > >> not fair:-)
>>  > >>
>>  > >> I need some clarification how we can use this HA lifetime.
>>  > >>
>>  > >> regards,
>>  > >> ryuji
>>  > >>
>>  > >> ps. Mobicom08 and Mobiarch08 CFP are attached below!!!!
>>  > >>
>>  > >>
>>  > --------------------------------------------------------------
>>  > -----------
>>  > >>                       CALL FOR PAPERS
>>  > >>
>>  > >>                          MobiCom 2008
>>  > >>           The Fourteenth Annual International Conference
>>  > >>               on Mobile Computing and Networking
>>  > >>
>>  > >>                       September 14-19, 2007
>>  > >>                       San Francisco Bay Area, CA, USA
>>  > >>             http://www.sigmobile.org/mobicom/2008/
>>  > >>                   Sponsored by ACM SIGMOBILE
>>  > >>
>>  > ---------------------------------------------------------------------
>>  > >> ---- ACM MobiCom is the premier international conference
>>  > dedicated to
>>  > >> addressing the challenges in the areas of mobile computing and
>>  > >> wireless and mobile networking.  It has served as an exciting
>>  > >> international forum since 1995, addressing networks, systems,
>>  > >> algorithms, and applications that support the symbiosis of mobile
>>  > >> computers and wireless networks. This year, we will continue this
>>  > >> tradition, but we especially encourage the submission of papers in
>>  > >> the experimental systems area.  This area has seen exciting
>>  > >> developments in recent years and explicit efforts will be taken to
>>  > >> represent it strongly at MobiCom this year.
>>  > >>
>>  > >> Authors are invited to submit full papers, challenges
>>  > papers, student
>>  > >> posters, and research demos and exhibits, presenting new research
>>  > >> related to the theory or practice of mobile computing
>>  > and/or wireless
>>  > >> and mobile networking. All submissions must describe original
>>  > >> research, not published or currently under review for another
>>  > >> conference or journal. Areas of interest include, but are
>>  > not limited
>>  > >> to:
>>  > >>
>>  > >> * Operating system and middleware support for mobile computing and
>>  > >>   networking
>>  > >> * Architectures, protocols, and algorithms to cope with mobility,
>>  > >>   limited bandwidth, limited power and/or intermittent connectivity
>>  > >> * Fundamental understanding of mobile computing and wireless
>>  > >> networking
>>  > >> * Wireless and mobile techniques for delay tolerant, mobile ad hoc,
>>  > >>   and wireless sensor networks
>>  > >> * Security, privacy, and trustworthiness of mobile and wireless
>>  > >> systems
>>  > >> * Wireless access technologies (e.g. mesh systems, PANs)
>>  > >> * Integration and interworking of wired and wireless networks
>>  > >> * Protocols exploiting novel technologies such as UWB, MIMO,
>>  > >>   directional antennas, and software radios
>>  > >> * Techniques for dynamic spectrum use
>>  > >> * Architectures, algorithms and protocols for cognitive wireless
>>  > >>   networks and their integration in the Internet
>>  > >> * Modeling, measurement and simulation of mobile networks
>>  > >> * Experimental test-beds for mobile/wireless networks
>>  > >> * Performance evaluation of mobile and wireless networks,
>>  > protocols,
>>  > >>   and systems
>>  > >> * Next generation (beyond 802.11) wireless technologies and related
>>  > >>   systems and protocols
>>  > >>
>>  > >> Submission Instructions
>>  > >> Detailed instructions on how and where to submit your paper can be
>>  > >> found at http://www.sigmobile.org/mobicom/2008/cfp.pdf
>>  > >>
>>  > >> IMPORTANT DATES:
>>  > >> Abstracts submission due: March 7, 2008 Paper submission
>>  > due: March
>>  > >> 14, 2008 Notification of acceptance: June 19, 2008 Camera-ready
>>  > >> version due: July 7, 2008
>>  > >>
>>  > >> General Chair - jj@soe.ucsc.edu:
>>  > >> J.J. Garcia-Luna-Aceves, UC Santa Cruz and PARC
>>  > >>
>>  > >> Technical Co-Chairs - mobicom08_pcchairs@acm.org:
>>  > >> Raghupathy (Siva) Sivakumar, Georgia Tech Peter
>>  > Steenkiste, Carnegie
>>  > >> Mellon University
>>  > >>
>>  > >> FOR MORE INFORMATION: Please contact the General Chair or Program
>>  > >> Co-Chairs for more information.  For information on ACM
>>  > SIGMOBILE and
>>  > >> the MobiCom series of conferences, see
>>  > http://www.sigmobile.org/ or
>>  > >> contact mobicom_info@acm.org.
>>  > >>
>>  > >>
>>  > --------------------------------------------------------------
>>  > -----------
>>  > >>                         CALL FOR PAPERS
>>  > >>
>>  > >>                        ACM MobiArch 2008
>>  > >>                  An ACM SIGCOMM 2008 Workshop
>>  > >>                Seattle, WA, USA, August 22, 2008
>>  > >>
>>  > >>              The 3rd ACM International Workshop on
>>  > >>          Mobility in the Evolving Internet Architecture
>>  > >>             Paper registration deadline: March 17, 2008
>>  > >>
>>  > ---------------------------------------------------------------------
>>  > >> ----
>>  > >>
>>  > >>      http://www.sigcomm.org/sigcomm2008/workshops/mobiarch/
>>  > >>
>>  > >> Recent developments in wireless access technologies and mobile
>>  > >> devices are beginning to make widespread user, terminal
>>  > and network
>>  > >> mobility a reality in the commercial Internet. At the same
>>  > time, the
>>  > >> Internet architecture struggles to incorporate the
>>  > functionality that
>>  > >> will sustain this increasingly more mobile and more
>>  > dynamic Internet
>>  > >> use.
>>  > >> Efficient
>>  > >> mobility management and mobility optimizations, locator-identifier
>>  > >> splits, multihoming, security and related network operation and
>>  > >> management functions are still in the early stages of
>>  > development. It
>>  > >> is, however, already clear that supporting widespread
>>  > mobility poses
>>  > >> to significantly impact the original end-to-end design of the
>>  > >> Internet.
>>  > >>
>>  > >> At the same time, critical momentum is building to significantly
>>  > >> revise or even replace the current Internet architecture. Several
>>  > >> substantial Future Internet initiatives have started in
>>  > Europe, the
>>  > >> US and Asia, and the topic is also actively being discussed in the
>>  > >> vendor and network operator communities. These Future Internet
>>  > >> efforts offer the exciting opportunity to design radically
>>  > different
>>  > >> approaches to supporting host and network mobility and
>>  > multihoming,
>>  > >> and may eventually lead to an internetwork architecture with
>>  > >> significantly more advanced mobility features than those that the
>>  > >> piecemeal extensions of the current Internet protocols result in.
>>  > >>
>>  > >> MobiArch'08 welcomes submissions from both researchers and
>>  > >> practitioners that explore recent advances in architectures,
>>  > >> protocols and emerging technologies to enable mobility and
>>  > >> multihoming in the Internet, as well as concepts and designs to
>>  > >> support widespread mobility and multihoming in future
>>  > internetworks.
>>  > >> Early results, position papers, systems and measurement papers are
>>  > >> particularly welcome.
>>  > >>
>>  > >> TOPICS
>>  > >> MobiArch'08 covers all aspects related to mobility in the
>>  > current and
>>  > >> future Internet, including, but not limited to:
>>  > >>
>>  > >> * Architectures and protocols for mobility support at all layers
>>  > >>   of the Internet protocol stack, as well as cross-layer approaches
>>  > >> * Novel concepts to support widespread mobility and multihoming
>>  > >>   in a Future Internet
>>  > >> * Routing and addressing issues (including locator/identifier
>>  > >>   splits) and their impact on the Internet architecture
>>  > >> * Multihoming, including flow distribution and load-sharing for
>>  > >>   wireless and mobility
>>  > >> * Performance evaluation, experimentation and modeling of
>>  > >>   Internet mobility
>>  > >> * Models for mobility patterns and their experimental validation
>>  > >> * New wireless technologies and services and their impact on the
>>  > >>   Internet architecture
>>  > >> * Location management, positioning and data management for
>>  > >>   wireless and mobility
>>  > >> * Accounting, access control, security and privacy issues and
>>  > >>   their impact on the Internet architecture
>>  > >> * Social, economic, scalability and deployment issues
>>  > >>
>>  > >> SUBMISSION GUIDELINES
>>  > >> Submissions must be no longer than six pages, including
>>  > all figures
>>  > >> and references, must be in PDF format, and must follow the ACM
>>  > >> formatting guidelines
>>  > >> (http://www.acm.org/sigs/publications/proceedings-templates
>>  > >> ).
>>  > >> Submissions that do not adhere to these requirements will
>>  > be rejected
>>  > >> without further review.
>>  > >> Peer review is single-blind; the authors names and
>>  > affiliations are
>>  > >> to be included on the submission. Submissions cannot be previously
>>  > >> published or be under concurrent review elsewhere. The
>>  > submission of
>>  > >> position papers is encouraged; please clearly identify position
>>  > >> papers as such when submitting.
>>  > >> Papers may be submitted at http://edas.info/newPaper.php?c=3D6140
>>  > >>
>>  > >> IMPORTANT DATES
>>  > >> March 17, 2008        Registration of paper abstract
>>  > >> March 24, 2008        Submissions due
>>  > >> May 1, 2008           Notification of acceptance
>>  > >> June 9, 2008          Camera ready version due
>>  > >> August 22, 2008       Workshop date
>>  > >>
>>  > >>
>>  > >> TECHNICAL PROGRAM COMMITTEE
>>  > >> Lars Eggert           (co-chair, Nokia Research Center, FI)
>>  > >> Linda Doyle           (co-chair, Trinity College, IE)
>>  > >> Rui Aguiar            (Universidade de Aveiro, PT)
>>  > >> Bengt Ahlgren         (Swedish Institute of Computer Science, SE)
>>  > >> Jari Arkko            (Ericsson, FI)
>>  > >> Marcelo Bagnulo       (University Carlos III of Madrid, ES)
>>  > >> Olivier Bonaventure   (Universit=E9 Catholique de Louvain, BE)
>>  > >> Wesley Eddy           (NASA/Verizon (US)
>>  > >> Joseph Evans          (University of Kansas, US)
>>  > >> Ted Faber             (USC Information Sciences Institute, US)
>>  > >> Stephen Hailes        (University College London, UK)
>>  > >> Roger Karrer          (T-Labs, DE)
>>  > >> Rajeev Koodli         (Nokia Research Center, US)
>>  > >> Donal O'Mahony        (Trinity College, IE)
>>  > >> J=F6rg Ott              (Helsinki University of Technology, FI)
>>  > >> Guru Parulkar         (Stanford University, US)
>>  > >> Dipankar Raychaudhuri (Rutgers University, US)
>>  > >> Dave Thaler           (Microsoft, US)
>>  > >> Ryuji Wakikawa        (Keio University, JP)
>>  > >> Klaus Wehrle          (RWTH Aachen University, DE)
>>  > >> Lixia Zhang           (UCLA, US)
>>  > >>
>>  > >> _______________________________________________
>>  > >> MEXT mailing list
>>  > >> MEXT@ietf.org
>>  > >> https://www.ietf.org/mailman/listinfo/mext
>>  > >
>>  >
>>  > _______________________________________________
>>  > MEXT mailing list
>>  > MEXT@ietf.org
>>  > https://www.ietf.org/mailman/listinfo/mext
>>  >
>>
>>
>>  _______________________________________________
>>  MEXT mailing list
>>  MEXT@ietf.org
>>  https://www.ietf.org/mailman/listinfo/mext
>>
>>     =


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Date: Thu, 3 Apr 2008 11:10:17 +0100
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From mext-bounces@ietf.org  Thu Apr  3 06:54:50 2008
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To: "'Hesham Soliman'" <hesham@elevatemobile.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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Hi Hesham,
I posted before on using TLV-encap for tunnel optimization (e.g. header
compression).
I think type values can be requested at time of defining protocols for this.
But I think tunnel optimization needs a more efficient TLV structure: 1
octet for only the type is needed, the other 3 octets are overhead and
should be eliminated.
Any objection mentioning such a usage? If not, we block something that
really makes sense.
Teco.

> -----Oorspronkelijk bericht-----
> Van: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] Namens Hesham
> Soliman
> Verzonden: donderdag 3 april 2008 10:45
> Aan: mext@ietf.org
> Onderwerp: [MEXT] TLV header in DSMIP
> 
> Folks,
> 
> During one of the reviews for DSMIP the issue came up regarding the
> TLV header Type field values and how the current spec doesn't describe
> how it can be used for IPsec.
> After looking into this a bit I don't see why we would need IPsec for
> this. We originally defined because people wanted to use GRE so the
> format would be:
> IP
> UDP
> GRE
> IP
> ...etc
> 
> It seems like it would be sufficient to only define this now for GRE
> and if someone comes up with a need for using IP/IPsec directly after
> the TLV header they can define that behaviour and request a new type
> value.
> 
> So the new draft would only allocate one value for GRE.
> 
> Any objections to this ? please respond quickly, we need to finish
> this ASAP.
> 
> Thanks,
> Hesham
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


From mext-bounces@ietf.org  Thu Apr  3 07:03:58 2008
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Hi Hesham,

Your proposal below is fine and we can move forward.

-Raj 


On 4/3/08 3:44 AM, "ext Hesham Soliman" <hesham@elevatemobile.com> wrote:

> Folks,
> 
> During one of the reviews for DSMIP the issue came up regarding the
> TLV header Type field values and how the current spec doesn't describe
> how it can be used for IPsec.
> After looking into this a bit I don't see why we would need IPsec for
> this. We originally defined because people wanted to use GRE so the
> format would be:
> IP
> UDP
> GRE
> IP
> ...etc
> 
> It seems like it would be sufficient to only define this now for GRE
> and if someone comes up with a need for using IP/IPsec directly after
> the TLV header they can define that behaviour and request a new type
> value.
> 
> So the new draft would only allocate one value for GRE.
> 
> Any objections to this ? please respond quickly, we need to finish
> this ASAP.
> 
> Thanks,
> Hesham
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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From: Hesham Soliman <hesham@elevatemobile.com>
To: "Teco Boot" <teco@inf-net.nl>
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Cc: mext@ietf.org
Subject: Re: [MEXT] [Mipshop]  TLV header in DSMIP
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Hi teco,

On 04/04/2008, at 12:54 AM, Teco Boot wrote:
> Hi Hesham,
> I posted before on using TLV-encap for tunnel optimization (e.g.  
> header
> compression).
> I think type values can be requested at time of defining protocols  
> for this.
> But I think tunnel optimization needs a more efficient TLV  
> structure: 1
> octet for only the type is needed, the other 3 octets are overhead and
> should be eliminated.
> Any objection mentioning such a usage? If not, we block something that
> really makes sense.

=> While i sympathise with your idea, I think that, as I said before,  
the benfits are minimal. Please note
that practically we don't expect this TLV header to be used by MNs. So  
compression is not needed.
Especially, at this stage (including the time you raised it), I don't  
think it's worth delaying things for it.
That's my opinion anyway.

Hesham

>
> Teco.
>
>> -----Oorspronkelijk bericht-----
>> Van: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] Namens  
>> Hesham
>> Soliman
>> Verzonden: donderdag 3 april 2008 10:45
>> Aan: mext@ietf.org
>> Onderwerp: [MEXT] TLV header in DSMIP
>>
>> Folks,
>>
>> During one of the reviews for DSMIP the issue came up regarding the
>> TLV header Type field values and how the current spec doesn't  
>> describe
>> how it can be used for IPsec.
>> After looking into this a bit I don't see why we would need IPsec for
>> this. We originally defined because people wanted to use GRE so the
>> format would be:
>> IP
>> UDP
>> GRE
>> IP
>> ...etc
>>
>> It seems like it would be sufficient to only define this now for GRE
>> and if someone comes up with a need for using IP/IPsec directly after
>> the TLV header they can define that behaviour and request a new type
>> value.
>>
>> So the new draft would only allocate one value for GRE.
>>
>> Any objections to this ? please respond quickly, we need to finish
>> this ASAP.
>>
>> Thanks,
>> Hesham
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>
> _______________________________________________
> Mipshop mailing list
> Mipshop@ietf.org
> https://www.ietf.org/mailman/listinfo/mipshop

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


From mext-bounces@ietf.org  Thu Apr  3 07:21:48 2008
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Date: Thu, 3 Apr 2008 15:21:01 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Hesham Soliman" <hesham@elevatemobile.com>
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Subject: Re: [MEXT] [Mipshop] TLV header in DSMIP
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Teco,

I am afraid I agree with Hesham, this seems like a really minor optimization.
I would suggest we move on.

Regards
George

On Thu, Apr 3, 2008 at 3:18 PM, Hesham Soliman <hesham@elevatemobile.com> wrote:
> Hi teco,
>
>
>  On 04/04/2008, at 12:54 AM, Teco Boot wrote:
>  > Hi Hesham,
>  > I posted before on using TLV-encap for tunnel optimization (e.g.
>  > header
>  > compression).
>  > I think type values can be requested at time of defining protocols
>  > for this.
>  > But I think tunnel optimization needs a more efficient TLV
>  > structure: 1
>  > octet for only the type is needed, the other 3 octets are overhead and
>  > should be eliminated.
>  > Any objection mentioning such a usage? If not, we block something that
>  > really makes sense.
>
>  => While i sympathise with your idea, I think that, as I said before,
>  the benfits are minimal. Please note
>  that practically we don't expect this TLV header to be used by MNs. So
>  compression is not needed.
>  Especially, at this stage (including the time you raised it), I don't
>  think it's worth delaying things for it.
>  That's my opinion anyway.
>
>  Hesham
>
>
>
>  >
>  > Teco.
>  >
>  >> -----Oorspronkelijk bericht-----
>  >> Van: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] Namens
>  >> Hesham
>  >> Soliman
>  >> Verzonden: donderdag 3 april 2008 10:45
>  >> Aan: mext@ietf.org
>  >> Onderwerp: [MEXT] TLV header in DSMIP
>  >>
>  >> Folks,
>  >>
>  >> During one of the reviews for DSMIP the issue came up regarding the
>  >> TLV header Type field values and how the current spec doesn't
>  >> describe
>  >> how it can be used for IPsec.
>  >> After looking into this a bit I don't see why we would need IPsec for
>  >> this. We originally defined because people wanted to use GRE so the
>  >> format would be:
>  >> IP
>  >> UDP
>  >> GRE
>  >> IP
>  >> ...etc
>  >>
>  >> It seems like it would be sufficient to only define this now for GRE
>  >> and if someone comes up with a need for using IP/IPsec directly after
>  >> the TLV header they can define that behaviour and request a new type
>  >> value.
>  >>
>  >> So the new draft would only allocate one value for GRE.
>  >>
>  >> Any objections to this ? please respond quickly, we need to finish
>  >> this ASAP.
>  >>
>  >> Thanks,
>  >> Hesham
>  >> _______________________________________________
>  >> MEXT mailing list
>  >> MEXT@ietf.org
>  >> https://www.ietf.org/mailman/listinfo/mext
>  >
>  > _______________________________________________
>  > Mipshop mailing list
>  > Mipshop@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mipshop
>
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


From parure@y-mitani.net  Thu Apr  3 09:41:49 2008
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Below:

On 2008-04-03 10:44 Hesham Soliman said the following:
> Folks,
> 
> During one of the reviews for DSMIP the issue came up regarding the  
> TLV header Type field values and how the current spec doesn't describe  
> how it can be used for IPsec.
> After looking into this a bit I don't see why we would need IPsec for  
> this. We originally defined because people wanted to use GRE so the  
> format would be:
> IP
> UDP
> GRE
> IP
> ...etc
> 
> It seems like it would be sufficient to only define this now for GRE  
> and if someone comes up with a need for using IP/IPsec directly after  
> the TLV header they can define that behaviour and request a new type  
> value.
> 
> So the new draft would only allocate one value for GRE.
> 
> Any objections to this ? please respond quickly, we need to finish  
> this ASAP.

WFM


	Henrik

_______________________________________________
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Subject: Re: [MEXT] TLV header in DSMIP
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Question .. 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Hesham Soliman
> Sent: Thursday, April 03, 2008 1:45 AM
> To: mext@ietf.org
> Subject: [MEXT] TLV header in DSMIP
> 
> Folks,
> 
> During one of the reviews for DSMIP the issue came up regarding the  
> TLV header Type field values and how the current spec doesn't 
> describe  
> how it can be used for IPsec.
> After looking into this a bit I don't see why we would need 
> IPsec for  
> this. We originally defined because people wanted to use GRE so the  
> format would be:
> IP
> UDP
> GRE
> IP
> ...etc
> 

I assume you mean ..

IP 
UDP
TLV-header
Other headers (GRE ..)


So, we assume 3948 scheme is in use and since ESP has the
semantics to identify the contained types ...

IPv4-UDP-ESP-GRE-(IPv4, IPv6) -- 3948 is in use, UDP port 4500.
IPv4-UDP-TLV-GRE-(IPv4, IPv6) -- DSMIP6 port.

This is ok.

Thanks
Sri




> It seems like it would be sufficient to only define this now for GRE  
> and if someone comes up with a need for using IP/IPsec 
> directly after  
> the TLV header they can define that behaviour and request a new type  
> value.
> 
> So the new draft would only allocate one value for GRE.
> 
> Any objections to this ? please respond quickly, we need to finish  
> this ASAP.
> 
> Thanks,
> Hesham
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

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Thread-Topic: [MEXT] FW: NEMO Solution Space for Aviation
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From: "Templin, Fred L" <Fred.L.Templin@boeing.com>
To: "Ivancic, William D. (GRC-RCN0)" <william.d.ivancic@nasa.gov>,
	<mext@ietf.org>
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Subject: Re: [MEXT] FW: NEMO Solution Space for Aviation
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Will,

Terry Davis pointed me to the ICAO ACP-WG-I meeting
minutes also, and have gone over the working papers from
the past meetings. The minutes seem to show a limited set
of contributers producing the majority of the materials,
and am not seeing definitive results based on operational
experience, fielded deployments, etc.

A number of the working papers have kept a balanced
consideration of alternatives, including MIPv6, HIP
and MOBIKE. (Even in the Working Paper #8 document you
cited, "global mobility management protocol" is defined
in non-exclusive fashion.) So, am not seeing the basis
for conclusions at the moment.

Thanks - Fred
fred.l.templin@boeing.com

>-----Original Message-----
>From: Ivancic, William D. (GRC-RCN0) 
>[mailto:william.d.ivancic@nasa.gov] 
>Sent: Friday, March 21, 2008 3:03 PM
>To: mext@ietf.org
>Subject: [MEXT] FW: NEMO Solution Space for Aviation
>
>International Civil Aviation Organization (ICAO) WGI (Internet) as has
>agreed to mandate Mobile IP for aircraft and have developed a draft
>addressing scheme for on-board prefixes. Some of the results are
>documented on the report of Working Papers 7 and 8.
>
>http://www.icao.int/anb/panels/acp/wgdoclist.cfm?MeetingID=234
>
>I need to check if MIPv6 or a MIPv6 NEMO-base solution has been
>proposed. 
>
>/Will
>
>
> 
>_______________________________________________
>MEXT mailing list
>MEXT@ietf.org
>https://www.ietf.org/mailman/listinfo/mext
>
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From: "Vijay Devarapallli" <dvijay@gmail.com>
To: "Hesham Soliman" <hesham@elevatemobile.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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On Thu, Apr 3, 2008 at 1:44 AM, Hesham Soliman <hesham@elevatemobile.com> wrote:
> Folks,
>
>  During one of the reviews for DSMIP the issue came up regarding the
>  TLV header Type field values and how the current spec doesn't describe
>  how it can be used for IPsec.

What was the issue?

>  After looking into this a bit I don't see why we would need IPsec for
>  this. We originally defined because people wanted to use GRE so the
>  format would be:
>  IP
>  UDP
>  GRE
>  IP
>  ...etc
>
>  It seems like it would be sufficient to only define this now for GRE
>  and if someone comes up with a need for using IP/IPsec directly after
>  the TLV header they can define that behaviour and request a new type
>  value.
>
>  So the new draft would only allocate one value for GRE.
>
>  Any objections to this ?

Yes. When we specified the TLV header, it was felt that the mobile
node and the home agent need can use the same UDP port for
both traffic tunneled with ESP encryption and for traffic without ESP
encryption. The same TLV header would tell the home agent whether
there is a GRE, IPv4, IPv6 or IPsec header that follows the TLV
header.

Without this, you end up using UDP port 4500 for IPsec protected
data traffic between the mobile node and the home agent and the
DS-MIPv6 UDP port for non-IPsec protected data traffic between the
mobile node and the home agent. I would prefer to avoid this.

Perhaps you could explain what the issue is with using the TLV
header followed by the ESP header.

Vijay
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From: Hesham Soliman <hesham@elevatemobile.com>
To: "Sri Gundavelli" <sgundave@cisco.com>
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>>

>> IP
>> UDP
>> GRE
>> IP
>> ...etc
>>
>
> I assume you mean ..
>
> IP
> UDP
> TLV-header
> Other headers (GRE ..)

=> No, I meant the above.

>
>
>
> So, we assume 3948 scheme is in use and since ESP has the
> semantics to identify the contained types ...

=> Not really, 3948 is not used for IPv6, so we can't assume that for  
all cases.

>
>
> IPv4-UDP-ESP-GRE-(IPv4, IPv6) -- 3948 is in use, UDP port 4500.
> IPv4-UDP-TLV-GRE-(IPv4, IPv6) -- DSMIP6 port.
>
> This is ok.

=> If you want to have ESP come right after the TLV then please send  
some text to describe this behaviour in terms of IPsec operation. I'm  
trying to avoid extending the IPsec
mess in the spec to strange cases that need more inquiries and more  
time at this stage. So I'd rather have that specified elsewhere.
I think the easiest thing now is to do the format I sent above and  
later if you want to add ESP/AH ...etc then you can specify that in a  
draft.

Hesham

>
>
> Thanks
> Sri
>
>
>
>
>> It seems like it would be sufficient to only define this now for GRE
>> and if someone comes up with a need for using IP/IPsec
>> directly after
>> the TLV header they can define that behaviour and request a new type
>> value.
>>
>> So the new draft would only allocate one value for GRE.
>>
>> Any objections to this ? please respond quickly, we need to finish
>> this ASAP.
>>
>> Thanks,
>> Hesham
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>

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From: Hesham Soliman <hesham@elevatemobile.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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>> Folks,
>>
>> During one of the reviews for DSMIP the issue came up regarding the
>> TLV header Type field values and how the current spec doesn't  
>> describe
>> how it can be used for IPsec.
>
> What was the issue?

=> The use of IPsec with this format was not specified. Sec AD's  
comment.

>
>
>> After looking into this a bit I don't see why we would need IPsec for
>> this. We originally defined because people wanted to use GRE so the
>> format would be:
>> IP
>> UDP
>> GRE
>> IP
>> ...etc
>>
>> It seems like it would be sufficient to only define this now for GRE
>> and if someone comes up with a need for using IP/IPsec directly after
>> the TLV header they can define that behaviour and request a new type
>> value.
>>
>> So the new draft would only allocate one value for GRE.
>>
>> Any objections to this ?
>
> Yes. When we specified the TLV header, it was felt that the mobile
> node and the home agent need can use the same UDP port for
> both traffic tunneled with ESP encryption and for traffic without ESP
> encryption. The same TLV header would tell the home agent whether
> there is a GRE, IPv4, IPv6 or IPsec header that follows the TLV
> header.

=> None of the above is impacted. The suggestion here is that this  
gets done in a separate document. The TLV is still specified with GRE  
in the current spec.
You can specify it for IP, IPsec ...etc in another draft. It's a  
matter of doing things in a modular way for the sake of documentation.  
There is no technical difference.

>
>
> Without this, you end up using UDP port 4500 for IPsec protected
> data traffic between the mobile node and the home agent and the
> DS-MIPv6 UDP port for non-IPsec protected data traffic between the
> mobile node and the home agent. I would prefer to avoid this.

=> See above, this is not an issue.

Hesham
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Subject: Re: [MEXT] TLV header in DSMIP
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On Thu, Apr 3, 2008 at 7:18 PM, Hesham Soliman <hesham@elevatemobile.com> wrote:

> > > Folks,
> > >
> > > During one of the reviews for DSMIP the issue came up regarding the
> > > TLV header Type field values and how the current spec doesn't describe
> > > how it can be used for IPsec.
> > >
> >
> > What was the issue?
> >
>  => The use of IPsec with this format was not specified. Sec AD's comment.

Was it in Pasi's review? What needs to be specified in addition? IPsec
shouldn't care about the TLV header that comes before the ESP header.

> > > After looking into this a bit I don't see why we would need IPsec for
> > > this. We originally defined because people wanted to use GRE so the
> > > format would be:
> > > IP
> > > UDP
> > > GRE
> > > IP
> > > ...etc
> > >
> > > It seems like it would be sufficient to only define this now for GRE
> > > and if someone comes up with a need for using IP/IPsec directly after
> > > the TLV header they can define that behaviour and request a new type
> > > value.
> > >
> > > So the new draft would only allocate one value for GRE.
> > >
> > > Any objections to this ?
> > >
> >
> > Yes. When we specified the TLV header, it was felt that the mobile
> > node and the home agent need can use the same UDP port for
> > both traffic tunneled with ESP encryption and for traffic without ESP
> > encryption. The same TLV header would tell the home agent whether
> > there is a GRE, IPv4, IPv6 or IPsec header that follows the TLV
> > header.
> >
>
>  => None of the above is impacted. The suggestion here is that this gets
> done in a separate document. The TLV is still specified with GRE in the
> current spec.
>  You can specify it for IP, IPsec ...etc in another draft.

IP? We are already reserving values for IPv4 and IPv6. Reserving a value
for IPsec is important because payload protection for the DS-MIPv6 tunnel
has useful use cases. There are proposals to use DS-MIPv6 to enable
direct access from the Internet to a home agent in the operator network.
This would require ESP tunnel mode encryption for the DS-MIPv6 tunnel.
I don't care about the "etc"...

> It's a matter of
> doing things in a modular way for the sake of documentation. There is no
> technical difference.

Its not clear what additional specification is needed. It wouldn't make
sense to have a separate document just to reserve one value for ESP.

Vijay
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Subject: Re: [MEXT] TLV header in DSMIP
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> >
> >
> > IPv4-UDP-ESP-GRE-(IPv4, IPv6) -- 3948 is in use, UDP port 4500.
> > IPv4-UDP-TLV-GRE-(IPv4, IPv6) -- DSMIP6 port.
> >
> > This is ok.
> 
> => If you want to have ESP come right after the TLV then please send  
> some text to describe this behaviour in terms of IPsec 
> operation. I'm  
> trying to avoid extending the IPsec
> mess in the spec to strange cases that need more inquiries and more  
> time at this stage. So I'd rather have that specified elsewhere.
> I think the easiest thing now is to do the format I sent above and  
> later if you want to add ESP/AH ...etc then you can specify 
> that in a  
> draft.
> 

Sure. I understand the pain dealing with all these IPsec issues that
were raised in the last few months.

However, on this, probably there is not much to specify. Atleast from
an implementation angle, its matter of implementing a tunnel interface
with a given encap mode and the ESP header just goes after the TLV,
just as how 3948 allows ESP right after UDP. We can borrow some text
from Sec 3.4 [3948]. Its just one more encap layer after UDP.

Appears to be straight forward to me. But, I'm not sure what issues
you or Pasi is referring to. 

Sri













> Hesham
> 
> >
> >
> > Thanks
> > Sri
> >
> >
> >
> >
> >> It seems like it would be sufficient to only define this 
> now for GRE
> >> and if someone comes up with a need for using IP/IPsec
> >> directly after
> >> the TLV header they can define that behaviour and request 
> a new type
> >> value.
> >>
> >> So the new draft would only allocate one value for GRE.
> >>
> >> Any objections to this ? please respond quickly, we need to finish
> >> this ASAP.
> >>
> >> Thanks,
> >> Hesham
> >> _______________________________________________
> >> MEXT mailing list
> >> MEXT@ietf.org
> >> https://www.ietf.org/mailman/listinfo/mext
> >
> 

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On 04/04/2008, at 2:09 PM, Vijay Devarapallli wrote:
> On Thu, Apr 3, 2008 at 7:18 PM, Hesham Soliman <hesham@elevatemobile.com 
> > wrote:
>
>>>> Folks,
>>>>
>>>> During one of the reviews for DSMIP the issue came up regarding the
>>>> TLV header Type field values and how the current spec doesn't  
>>>> describe
>>>> how it can be used for IPsec.
>>>>
>>>
>>> What was the issue?
>>>
>> => The use of IPsec with this format was not specified. Sec AD's  
>> comment.
>
> Was it in Pasi's review? What needs to be specified in addition? IPsec
> shouldn't care about the TLV header that comes before the ESP header.

=>  Yes it's from Pasi's review. I'm cc'ing him so he can answer you  
directly and he needs to be aware of this
conversation.

>
>
>>>> After looking into this a bit I don't see why we would need IPsec  
>>>> for
>>>> this. We originally defined because people wanted to use GRE so the
>>>> format would be:
>>>> IP
>>>> UDP
>>>> GRE
>>>> IP
>>>> ...etc
>>>>
>>>> It seems like it would be sufficient to only define this now for  
>>>> GRE
>>>> and if someone comes up with a need for using IP/IPsec directly  
>>>> after
>>>> the TLV header they can define that behaviour and request a new  
>>>> type
>>>> value.
>>>>
>>>> So the new draft would only allocate one value for GRE.
>>>>
>>>> Any objections to this ?
>>>>
>>>
>>> Yes. When we specified the TLV header, it was felt that the mobile
>>> node and the home agent need can use the same UDP port for
>>> both traffic tunneled with ESP encryption and for traffic without  
>>> ESP
>>> encryption. The same TLV header would tell the home agent whether
>>> there is a GRE, IPv4, IPv6 or IPsec header that follows the TLV
>>> header.
>>>
>>
>> => None of the above is impacted. The suggestion here is that this  
>> gets
>> done in a separate document. The TLV is still specified with GRE in  
>> the
>> current spec.
>> You can specify it for IP, IPsec ...etc in another draft.
>
> IP? We are already reserving values for IPv4 and IPv6. Reserving a  
> value
> for IPsec is important because payload protection for the DS-MIPv6  
> tunnel
> has useful use cases. There are proposals to use DS-MIPv6 to enable
> direct access from the Internet to a home agent in the operator  
> network.
> This would require ESP tunnel mode encryption for the DS-MIPv6 tunnel.
> I don't care about the "etc"...

=> I've already said at least twice that I'm not suggesting we don't  
ever support IPsec for the TLV. Please
understand that I'm talking about moving this to another doc. So no  
need to tell me that you need to use it. If you
do, you can specify that.


> Its not clear what additional specification is needed. It wouldn't  
> make
> sense to have a separate document just to reserve one value for ESP.

=> If the WG agrees that no additional specification is needed and the  
AD agrees then I'm fine with that.
If additional specification is needed then we should take it out of  
this spec.

Pasi, please clarify to the WG what additional specification is needed  
for the use of ESP/AH following the
TLV header.

Hesham

>
>
> Vijay

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From: Hesham Soliman <hesham@elevatemobile.com>
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On 04/04/2008, at 2:29 PM, Sri Gundavelli wrote:
>
>>>
>>>
>>> IPv4-UDP-ESP-GRE-(IPv4, IPv6) -- 3948 is in use, UDP port 4500.
>>> IPv4-UDP-TLV-GRE-(IPv4, IPv6) -- DSMIP6 port.
>>>
>>> This is ok.
>>
>> => If you want to have ESP come right after the TLV then please send
>> some text to describe this behaviour in terms of IPsec
>> operation. I'm
>> trying to avoid extending the IPsec
>> mess in the spec to strange cases that need more inquiries and more
>> time at this stage. So I'd rather have that specified elsewhere.
>> I think the easiest thing now is to do the format I sent above and
>> later if you want to add ESP/AH ...etc then you can specify
>> that in a
>> draft.
>>
>
> Sure. I understand the pain dealing with all these IPsec issues that
> were raised in the last few months.
>
> However, on this, probably there is not much to specify. Atleast from
> an implementation angle, its matter of implementing a tunnel interface
> with a given encap mode and the ESP header just goes after the TLV,
> just as how 3948 allows ESP right after UDP. We can borrow some text
> from Sec 3.4 [3948]. Its just one more encap layer after UDP.

=> Sri, if you think there is not much to do here then please send text.

Thanks,
Hesham

>
>
> Appears to be straight forward to me. But, I'm not sure what issues
> you or Pasi is referring to.
>
> Sri
>
>
>
>
>
>
>
>
>
>
>
>
>
>> Hesham
>>
>>>
>>>
>>> Thanks
>>> Sri
>>>
>>>
>>>
>>>
>>>> It seems like it would be sufficient to only define this
>> now for GRE
>>>> and if someone comes up with a need for using IP/IPsec
>>>> directly after
>>>> the TLV header they can define that behaviour and request
>> a new type
>>>> value.
>>>>
>>>> So the new draft would only allocate one value for GRE.
>>>>
>>>> Any objections to this ? please respond quickly, we need to finish
>>>> this ASAP.
>>>>
>>>> Thanks,
>>>> Hesham
>>>> _______________________________________________
>>>> MEXT mailing list
>>>> MEXT@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/mext
>>>
>>
>

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From: "Benjamin Lim" <benjamin.limck@sg.panasonic.com>
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Subject: Re: [MEXT] The usage of "HA lifetime" (RFC3775-update)
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Hi Ryuji,
 =

See below.

=3D8=3D=3D8<=3D8=3D=3D
> RFC3775 clearly said that the HA entry MUST be deleted when =

> its lifetime is expired.
[Ben] Which part of 3775 states this? Base on section 11.4.1, I did not see
such comment.

> BUT the lifetime is not always available...
> =

> So far, we have two options for this.
> =

> 1. George
>      No cache. MN does not record the HA information in its =

> home agent list.
> 2. Vijay
>      Local configuration matter. No modification is required =

> to RFC3775.
> =

> I personally agree with Vijay, but I think we need some =

> clarification for this in the bis.
> We might need to define the default value for the locally =

> configured HA lifetime..
[Ben] Base on my understanding of 3775 sect 11.4.1, it does not specifically
mention what MN will do to the list of HA address received in DHAAD reply. I
think the confusion comes in because the section state one possible way to
do home registration is to perform a sequential trial of each home agent
address in the list (e.g. test 1st HA address --> fail --> test 2nd HA
address --> fail --> until end of list or succeed.) So this implies that MN
should store the list of HA address in order to do the above action. Whether
this list is store temporary (just to find HA) or permenantly (info for MN
in case HA goes down) is not mention. Maybe we should add some clarifying
text for this matter?

Regards,
Benjamin Lim

> =

> regards,
> ryuji
> =

> George Tsirtsis
> > Guys,
> >
> > I am not sure I follow you.
> >
> > My understanding of the HA advertising a Lifetime on a link =

> is that it =

> > allows nodes on the link to (1) discover the HA address (2) =

> cache the =

> > HA address for as long as the lifetime indicates. This =

> makes sense *on
> > link* since end nodes may discover the HA capability but =

> they may also =

> > have no use for it for a while (e.g., until a handoff to a foreign =

> > link).
> >
> > If  this explanation is correct, I would argue that when the HA is =

> > discovered from a foreign link e.g., using DHAAD, DNS, DHCP =

> etc, the =

> > HA address must be used immediately and thus should NOT be =

> cached. In =

> > other words the MN should discover the HA address when it =

> needs it and =

> > then either engage with it or forget about it.
> >
> > Does this make sense?
> >
> > George
> >
> > On Thu, Mar 20, 2008 at 9:19 AM, Benjamin Lim =

> > <benjamin.limck@sg.panasonic.com> wrote:
> >   =

> >> Hi,
> >>
> >>  Just saw this mail in my back-log. Comments inline.
> >>
> >>
> >>  > -----Original Message-----
> >>  > From: mext-bounces@ietf.org =

> [mailto:mext-bounces@ietf.org] On  > =

> >> Behalf Of RYUJI WAKIKAWA  > Sent: Monday, March 17, 2008 =

> 4:39 PM  > =

> >> To: Hesham Soliman  > Cc: mext@ietf.org  > Subject: Re: [MEXT] The =

> >> usage of "HA lifetime" (RFC3775-update)  >  > Hi Hesham  > =

>  > I guess =

> >> this HA lifetime (Home Agent Information Option)  > might be =

> >> originally introduced for the management of home  > agents =

> operated =

> >> on the same link.
> >>  > Indeed, all the description for this option are for the Home  > =

> >> Agent operation in RFC3775.
> >>  [Ben] Most likely, HAs on home link uses lifetime to compute =

> >> preferences on  the avaliability of HAs, since 3775 states that HA =

> >> will reply MN in the HA  list a number of prefered HAs.
> >>
> >>
> >>  >
> >>  > We should clearly state that this option is used only for HA  > =

> >> and not for MN.
> >>  > The usage of the home agent information option can be =

> limited  > =

> >> to the HA.
> >>  [Ben] Why limit for HA usage? You pointed out in your =

> previous mail =

> >> that  since MR/MN does not know HA lifetime, is it not =

> better to also =

> >> inform MR/MN  of HA's lifetime in the HA list to advert =

> those issues you raised up?
> >>
> >>  Regards,
> >>  Benjamin Lim
> >>
> >>
> >>
> >>  > We just need to add 1-2 lines for the better =

> clarification of this.
> >>  >
> >>  > what do you think?
> >>  >
> >>  > regards
> >>  > ryuji
> >>  >
> >>  >
> >>  >
> >>  >
> >>  > On 2008/03/14, at 12:44, Hesham Soliman wrote:
> >>  >
> >>  > > I think this is a valid point but I don't know if 3775 is the =

> >> right  > > place to address it. Since DHAAD is the only mechanism =

> >> defined in  > > 3775 there is no issue. Other RFCs that =

> define other  =

> >> > mechanisms need  > > to address the missing information.
> >>  > >
> >>  > > Hesham
> >>  > > On 14/03/2008, at 2:36 AM, RYUJI WAKIKAWA wrote:
> >>  > >
> >>  > >> Hi
> >>  > >>
> >>  > >> In RFC3775, the HA can advertise the HA lifetime by the Home =

> >> Agent  > >> information option carried in RA.
> >>  > >> However, this home agent lifetime is only available =

> in this option.
> >>  > >>
> >>  > >> When MR boots up from a foreign link, there are =

> several  > ways =

> >> to get  > >> HA address such as DNS lookup, DHAAD (no HA lifetime =

> >> field  > is defined  > >> in DHAAD message), etc.
> >>  > >>
> >>  > >> How should MN manage these HAs in the home agent list?
> >>  > >>
> >>  > >> When the HA lifetime is not available, should MN set  > =

> >> INFINITY value  > >> for the HA in the home agent list?
> >>  > >>
> >>  > >> When MN obtains HA at the foreign link and then back to the =

> >> home,  > >> shall MN update the HA lifetime of that HA to =

> the value  =

> >> > specified in  > >> RA?
> >>  > >>
> >>  > >> MN might lose the HA due to the HA lifetime =

> expiration if  > it =

> >> return  > >> home.
> >>  > >> If it never returns home, MN can keep the HA address =

>  > forever =

> >> This is  > >> not fair:-)  > >>  > >> I need some =

> clarification how =

> >> we can use this HA lifetime.
> >>  > >>
> >>  > >> regards,
> >>  > >> ryuji
> >>  > >>
> >>  > >> ps. Mobicom08 and Mobiarch08 CFP are attached below!!!!
> >>  > >>
> >>  > >>
> >>  > --------------------------------------------------------------
> >>  > -----------
> >>  > >>                       CALL FOR PAPERS
> >>  > >>
> >>  > >>                          MobiCom 2008
> >>  > >>           The Fourteenth Annual International Conference
> >>  > >>               on Mobile Computing and Networking
> >>  > >>
> >>  > >>                       September 14-19, 2007
> >>  > >>                       San Francisco Bay Area, CA, USA
> >>  > >>             http://www.sigmobile.org/mobicom/2008/
> >>  > >>                   Sponsored by ACM SIGMOBILE
> >>  > >>
> >>  > =

> >> =

> ---------------------------------------------------------------------
> >>  > >> ---- ACM MobiCom is the premier international conference  > =

> >> dedicated to  > >> addressing the challenges in the areas =

> of mobile =

> >> computing and  > >> wireless and mobile networking.  It =

> has served as =

> >> an exciting  > >> international forum since 1995, addressing =

> >> networks, systems,  > >> algorithms, and applications that support =

> >> the symbiosis of mobile  > >> computers and wireless =

> networks. This =

> >> year, we will continue this  > >> tradition, but we especially =

> >> encourage the submission of papers in  > >> the =

> experimental systems =

> >> area.  This area has seen exciting  > >> developments in =

> recent years =

> >> and explicit efforts will be taken to  > >> represent it =

> strongly at =

> >> MobiCom this year.
> >>  > >>
> >>  > >> Authors are invited to submit full papers, challenges  > =

> >> papers, student  > >> posters, and research demos and exhibits, =

> >> presenting new research  > >> related to the theory or practice of =

> >> mobile computing  > and/or wireless  > >> and mobile =

> networking. All =

> >> submissions must describe original  > >> research, not =

> published or =

> >> currently under review for another  > >> conference or =

> journal. Areas =

> >> of interest include, but are  > not limited  > >> to:
> >>  > >>
> >>  > >> * Operating system and middleware support for mobile =

> computing and
> >>  > >>   networking
> >>  > >> * Architectures, protocols, and algorithms to cope =

> with mobility,
> >>  > >>   limited bandwidth, limited power and/or =

> intermittent connectivity
> >>  > >> * Fundamental understanding of mobile computing and =

> wireless  > =

> >> >> networking  > >> * Wireless and mobile techniques for delay =

> >> tolerant, mobile ad hoc,
> >>  > >>   and wireless sensor networks
> >>  > >> * Security, privacy, and trustworthiness of mobile =

> and wireless  =

> >> > >> systems  > >> * Wireless access technologies (e.g. =

> mesh systems, =

> >> PANs)  > >> * Integration and interworking of wired and wireless =

> >> networks  > >> * Protocols exploiting novel technologies =

> such as UWB, =

> >> MIMO,
> >>  > >>   directional antennas, and software radios
> >>  > >> * Techniques for dynamic spectrum use  > >> * Architectures, =

> >> algorithms and protocols for cognitive wireless
> >>  > >>   networks and their integration in the Internet
> >>  > >> * Modeling, measurement and simulation of mobile =

> networks  > >> =

> >> * Experimental test-beds for mobile/wireless networks  > >> * =

> >> Performance evaluation of mobile and wireless networks,  > =

> protocols,
> >>  > >>   and systems
> >>  > >> * Next generation (beyond 802.11) wireless =

> technologies and related
> >>  > >>   systems and protocols
> >>  > >>
> >>  > >> Submission Instructions
> >>  > >> Detailed instructions on how and where to submit =

> your paper can =

> >> be  > >> found at http://www.sigmobile.org/mobicom/2008/cfp.pdf
> >>  > >>
> >>  > >> IMPORTANT DATES:
> >>  > >> Abstracts submission due: March 7, 2008 Paper submission  > =

> >> due: March  > >> 14, 2008 Notification of acceptance: June =

> 19, 2008 =

> >> Camera-ready  > >> version due: July 7, 2008  > >>  > >> General =

> >> Chair - jj@soe.ucsc.edu:
> >>  > >> J.J. Garcia-Luna-Aceves, UC Santa Cruz and PARC  > >>  > >> =

> >> Technical Co-Chairs - mobicom08_pcchairs@acm.org:
> >>  > >> Raghupathy (Siva) Sivakumar, Georgia Tech Peter  > =

> Steenkiste, =

> >> Carnegie  > >> Mellon University  > >>  > >> FOR MORE INFORMATION: =

> >> Please contact the General Chair or Program  > >> =

> Co-Chairs for more =

> >> information.  For information on ACM  > SIGMOBILE and  > >> the =

> >> MobiCom series of conferences, see  > =

> http://www.sigmobile.org/ or  > =

> >> >> contact mobicom_info@acm.org.
> >>  > >>
> >>  > >>
> >>  > --------------------------------------------------------------
> >>  > -----------
> >>  > >>                         CALL FOR PAPERS
> >>  > >>
> >>  > >>                        ACM MobiArch 2008
> >>  > >>                  An ACM SIGCOMM 2008 Workshop
> >>  > >>                Seattle, WA, USA, August 22, 2008
> >>  > >>
> >>  > >>              The 3rd ACM International Workshop on
> >>  > >>          Mobility in the Evolving Internet Architecture
> >>  > >>             Paper registration deadline: March 17, 2008
> >>  > >>
> >>  > =

> >> =

> ---------------------------------------------------------------------
> >>  > >> ----
> >>  > >>
> >>  > >>      http://www.sigcomm.org/sigcomm2008/workshops/mobiarch/
> >>  > >>
> >>  > >> Recent developments in wireless access technologies =

> and mobile  =

> >> > >> devices are beginning to make widespread user, =

> terminal  > and =

> >> network  > >> mobility a reality in the commercial =

> Internet. At the =

> >> same  > time, the  > >> Internet architecture struggles to =

> >> incorporate the  > functionality that  > >> will sustain this =

> >> increasingly more mobile and more  > dynamic Internet  > >> use.
> >>  > >> Efficient
> >>  > >> mobility management and mobility optimizations, =

> >> locator-identifier  > >> splits, multihoming, security and related =

> >> network operation and  > >> management functions are still in the =

> >> early stages of  > development. It  > >> is, however, =

> already clear =

> >> that supporting widespread  > mobility poses  > >> to =

> significantly =

> >> impact the original end-to-end design of the  > >> Internet.
> >>  > >>
> >>  > >> At the same time, critical momentum is building to =

> >> significantly  > >> revise or even replace the current Internet =

> >> architecture. Several  > >> substantial Future Internet =

> initiatives =

> >> have started in  > Europe, the  > >> US and Asia, and the topic is =

> >> also actively being discussed in the  > >> vendor and network =

> >> operator communities. These Future Internet  > >> efforts =

> offer the =

> >> exciting opportunity to design radically  > different  > >> =

> >> approaches to supporting host and network mobility and  > =

> >> multihoming,  > >> and may eventually lead to an internetwork =

> >> architecture with  > >> significantly more advanced =

> mobility features =

> >> than those that the  > >> piecemeal extensions of the current =

> >> Internet protocols result in.
> >>  > >>
> >>  > >> MobiArch'08 welcomes submissions from both =

> researchers and  > =

> >> >> practitioners that explore recent advances in =

> architectures,  > >> =

> >> protocols and emerging technologies to enable mobility and  > >> =

> >> multihoming in the Internet, as well as concepts and =

> designs to  > >> =

> >> support widespread mobility and multihoming in future  > =

> >> internetworks.
> >>  > >> Early results, position papers, systems and =

> measurement papers =

> >> are  > >> particularly welcome.
> >>  > >>
> >>  > >> TOPICS
> >>  > >> MobiArch'08 covers all aspects related to mobility in the  > =

> >> current and  > >> future Internet, including, but not limited to:
> >>  > >>
> >>  > >> * Architectures and protocols for mobility support =

> at all layers
> >>  > >>   of the Internet protocol stack, as well as =

> cross-layer approaches
> >>  > >> * Novel concepts to support widespread mobility and =

> multihoming
> >>  > >>   in a Future Internet
> >>  > >> * Routing and addressing issues (including locator/identifier
> >>  > >>   splits) and their impact on the Internet architecture
> >>  > >> * Multihoming, including flow distribution and =

> load-sharing for
> >>  > >>   wireless and mobility
> >>  > >> * Performance evaluation, experimentation and modeling of
> >>  > >>   Internet mobility
> >>  > >> * Models for mobility patterns and their experimental =

> >> validation  > >> * New wireless technologies and services =

> and their impact on the
> >>  > >>   Internet architecture
> >>  > >> * Location management, positioning and data management for
> >>  > >>   wireless and mobility
> >>  > >> * Accounting, access control, security and privacy issues and
> >>  > >>   their impact on the Internet architecture
> >>  > >> * Social, economic, scalability and deployment =

> issues  > >>  > =

> >> >> SUBMISSION GUIDELINES  > >> Submissions must be no =

> longer than six =

> >> pages, including  > all figures  > >> and references, must =

> be in PDF =

> >> format, and must follow the ACM  > >> formatting guidelines  > >> =

> >> (http://www.acm.org/sigs/publications/proceedings-templates
> >>  > >> ).
> >>  > >> Submissions that do not adhere to these requirements =

> will  > be =

> >> rejected  > >> without further review.
> >>  > >> Peer review is single-blind; the authors names and  > =

> >> affiliations are  > >> to be included on the submission. =

> Submissions =

> >> cannot be previously  > >> published or be under concurrent review =

> >> elsewhere. The  > submission of  > >> position papers is =

> encouraged; =

> >> please clearly identify position  > >> papers as such when =

> >> submitting.
> >>  > >> Papers may be submitted at =

> http://edas.info/newPaper.php?c=3D6140
> >>  > >>
> >>  > >> IMPORTANT DATES
> >>  > >> March 17, 2008        Registration of paper abstract
> >>  > >> March 24, 2008        Submissions due
> >>  > >> May 1, 2008           Notification of acceptance
> >>  > >> June 9, 2008          Camera ready version due
> >>  > >> August 22, 2008       Workshop date
> >>  > >>
> >>  > >>
> >>  > >> TECHNICAL PROGRAM COMMITTEE
> >>  > >> Lars Eggert           (co-chair, Nokia Research Center, FI)
> >>  > >> Linda Doyle           (co-chair, Trinity College, IE)
> >>  > >> Rui Aguiar            (Universidade de Aveiro, PT)
> >>  > >> Bengt Ahlgren         (Swedish Institute of Computer =

> Science, SE)
> >>  > >> Jari Arkko            (Ericsson, FI)
> >>  > >> Marcelo Bagnulo       (University Carlos III of Madrid, ES)
> >>  > >> Olivier Bonaventure   (Universit=E9 Catholique de Louvain, BE)
> >>  > >> Wesley Eddy           (NASA/Verizon (US)
> >>  > >> Joseph Evans          (University of Kansas, US)
> >>  > >> Ted Faber             (USC Information Sciences =

> Institute, US)
> >>  > >> Stephen Hailes        (University College London, UK)
> >>  > >> Roger Karrer          (T-Labs, DE)
> >>  > >> Rajeev Koodli         (Nokia Research Center, US)
> >>  > >> Donal O'Mahony        (Trinity College, IE)
> >>  > >> J=F6rg Ott              (Helsinki University of Technology, FI)
> >>  > >> Guru Parulkar         (Stanford University, US)
> >>  > >> Dipankar Raychaudhuri (Rutgers University, US)
> >>  > >> Dave Thaler           (Microsoft, US)
> >>  > >> Ryuji Wakikawa        (Keio University, JP)
> >>  > >> Klaus Wehrle          (RWTH Aachen University, DE)
> >>  > >> Lixia Zhang           (UCLA, US)
> >>  > >>
> >>  > >> _______________________________________________
> >>  > >> MEXT mailing list
> >>  > >> MEXT@ietf.org
> >>  > >> https://www.ietf.org/mailman/listinfo/mext
> >>  > >
> >>  >
> >>  > _______________________________________________
> >>  > MEXT mailing list
> >>  > MEXT@ietf.org
> >>  > https://www.ietf.org/mailman/listinfo/mext
> >>  >
> >>
> >>
> >>  _______________________________________________
> >>  MEXT mailing list
> >>  MEXT@ietf.org
> >>  https://www.ietf.org/mailman/listinfo/mext
> >>
> >>     =

> =

> =



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From mext-bounces@ietf.org  Fri Apr  4 00:22:40 2008
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From: "Teco Boot" <teco@inf-net.nl>
To: "'Hesham Soliman'" <hesham@elevatemobile.com>
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Subject: Re: [MEXT] [Mipshop]  TLV header in DSMIP
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Hi Hesham,
I do not want to delay something.
On 3 octets unneeded overhead: I think this is a major issue in any HC
scheme. My background is radio links with low data rates. Check for example
RFC4944 (IPv6 over IEEE 802.15.4).
I appreciate comments from HC experts.
Regards, Teco

> -----Oorspronkelijk bericht-----
> Van: Hesham Soliman [mailto:hesham@elevatemobile.com]
> Verzonden: donderdag 3 april 2008 16:19
> Aan: Teco Boot
> CC: mext@ietf.org
> Onderwerp: Re: [Mipshop] [MEXT] TLV header in DSMIP
> 
> Hi teco,
> 
> On 04/04/2008, at 12:54 AM, Teco Boot wrote:
> > Hi Hesham,
> > I posted before on using TLV-encap for tunnel optimization (e.g.
> > header
> > compression).
> > I think type values can be requested at time of defining protocols
> > for this.
> > But I think tunnel optimization needs a more efficient TLV
> > structure: 1
> > octet for only the type is needed, the other 3 octets are overhead
> and
> > should be eliminated.
> > Any objection mentioning such a usage? If not, we block something
> that
> > really makes sense.
> 
> => While i sympathise with your idea, I think that, as I said before,
> the benfits are minimal. Please note
> that practically we don't expect this TLV header to be used by MNs. So
> compression is not needed.
> Especially, at this stage (including the time you raised it), I don't
> think it's worth delaying things for it.
> That's my opinion anyway.
> 
> Hesham
> 
> >
> > Teco.
> >
> >> -----Oorspronkelijk bericht-----
> >> Van: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] Namens
> >> Hesham
> >> Soliman
> >> Verzonden: donderdag 3 april 2008 10:45
> >> Aan: mext@ietf.org
> >> Onderwerp: [MEXT] TLV header in DSMIP
> >>
> >> Folks,
> >>
> >> During one of the reviews for DSMIP the issue came up regarding the
> >> TLV header Type field values and how the current spec doesn't
> >> describe
> >> how it can be used for IPsec.
> >> After looking into this a bit I don't see why we would need IPsec
> for
> >> this. We originally defined because people wanted to use GRE so the
> >> format would be:
> >> IP
> >> UDP
> >> GRE
> >> IP
> >> ...etc
> >>
> >> It seems like it would be sufficient to only define this now for GRE
> >> and if someone comes up with a need for using IP/IPsec directly
> after
> >> the TLV header they can define that behaviour and request a new type
> >> value.
> >>
> >> So the new draft would only allocate one value for GRE.
> >>
> >> Any objections to this ? please respond quickly, we need to finish
> >> this ASAP.
> >>
> >> Thanks,
> >> Hesham
> >> _______________________________________________
> >> MEXT mailing list
> >> MEXT@ietf.org
> >> https://www.ietf.org/mailman/listinfo/mext
> >
> > _______________________________________________
> > Mipshop mailing list
> > Mipshop@ietf.org
> > https://www.ietf.org/mailman/listinfo/mipshop

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Vijay Devarapallli wrote:

> Without this, you end up using UDP port 4500 for IPsec protected
> data traffic between the mobile node and the home agent and the
> DS-MIPv6 UDP port for non-IPsec protected data traffic between the
> mobile node and the home agent. I would prefer to avoid this.

In the current spec (version -01) this is precisely the situation:
traffic protected with IPsec tunnel mode uses port 4500.

(BU/BAck is protected with transport mode IPsec, but in that case,
the packet also has an IPv6 header, so the TLV-Header type would
be IPv6.)

Best regards,
Pasi
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From mext-bounces@ietf.org  Fri Apr  4 04:22:30 2008
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Date: Fri, 04 Apr 2008 12:22:31 +0100
From: Tony Whyman <tony.whyman@mccallumwhyman.com>
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Subject: [MEXT] A Proposed Solution for Aeronautical RO
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Dear all,

I have prepared a proposed IPsec based RO scheme that is intended to 
meet the requirements contained in draft-ietf-mext-aero-reqs-01. The 
paper can be downloaded from:

http://www.mccallumwhyman.com/papers/Proposal%20for%20Aeronautical%20RO.pdf

It's a large paper (15,000+ words) but that is because of the large 
Appendix A, which is an analysis of how the proposal meets the current 
aeronautical use cases. Appendix B also provides a compliancy check 
against draft-ietf-mext-aero-reqs-01.

The main body of the paper is likely to be of most interest to this 
group. In this, I have tried to evolve the IPsec RO approach proposed in 
draft-ietf-mip6-cn-ipsec-07 into a common framework with the 
recommendations of Eurocontrol 2006  IP Study. This study was intended 
to "assess the feasibility of using IP to support the next generation of 
collaborative ATS applications, in the 2020+ timeframe". The published 
results of that study can be downloaded from the ICAO website (URL in 
the references list of my paper).

Although the focus of the paper is on meeting the requirements for 
Aeronautical use, I do not believe that the requirements are unique to 
civil aviation. The UK Railways Safety and Standards Board (RSSB) is 
also about to publish a Guidance Note (Ref: GE/GN8579) which is intended 
to co-ordinate the use of IP Networking for mobile networking to trains. 
SATCOM, GPRS, WiFi and WiMAX networks are already being used to support 
passenger "on train" internet access and some operational use, and this 
Guidance Note is intended to co-ordinate the use of IP for operational 
comms, leading into Safety Related applications. It was the result of 
industry consultation and workshops and resulted in a very similar set 
of operational scenarios to those seen in ATC, and a similar proposal 
for IPsec based mobile communications.

My own conclusion from all this, is that there is a real need for an 
IPsec based Mobility Framework to meet the needs of Operational 
Communications in (at least) Transport Infrastructure applications.

My paper has made some specific criticisms of 
draft-ietf-mip6-cn-ipsec-07, where I do not believe it meets the needs 
of aeronautical communications. However, the underlying criticism is 
that draft-ietf-mip6-cn-ipsec-07 is relatively neutral as regards IKEv1 
and IKEv2. My view is that IKEv2 is not just a better protocol, but with 
improved Traffic Selection signalling and the MOBIKE (RFC 4555), it is 
the only flavour of IPsec IKE that should be considered for an IPsec 
based mobility framework.

Starting with the assumption that IKEv2/MOBIKE is used, I believe that 
it is possible to demonstrate a much improved strategy for IPsec based 
Route Optimisation, that starts with the use of the Home Address as the 
MN SA end-point and then moves it to the care-of address. Thus 
demonstrating both authorisation to use the Home Address and Return 
Routability to both addresses before any user data is exchanged. 
Interestingly, if user data is to be protected by ESP or AH tunnelling 
then there seems to be no need to exchange a Binding Update, as Child 
SAs with appropriate Traffic Selectors seem to be sufficient.

A further step is also possible if both MN and CN support a common PKI 
that provides both authentication and authorisation of the MN to use its 
Home Address. In this case, it appears possible for the MN to start the 
IPsec based RO procedure direct from its care-of address without there 
needing to be any Home Agent involvement. This is particularly 
interesting to aeronautical use, where communication is generally 
aircraft initiated, as it avoids both availability and regulatory issues 
with Home Agents, and fits with the recommendations of the Eurocontrol 
IP Study. Although it did not call it as such, this study essentially 
proposed an IPsec based RO scheme, which it called "tunnel movement" and 
assumed a PKI that authenticated aircraft and their use of their static 
IP Addresses.

The study limited itself to what was possible with published RFCs, and 
thus all air/ground communications had to be ESP tunnelled, due to the 
use of IKEv2/MOBIKE to manage the communications paths. Two specific 
criticisms arise from this. One is that there are many cases where an 
RFC 3775 Home Address Option/Type 2 Routing Header and Transport mode 
ESP would be more efficient than ESP tunnelling, and the other is that 
it forces all air/ground communications to be protected, even when the 
overhead of doing so is not otherwise justifiable.

In my paper, I have tried to resolve both criticisms.

I have resolved the first, by proposing a new IPsec SA mode that 
essentially combines ESP/AH transport mode with use of the RFC 3775 Home 
Address Option/Type 2 Routing Header.

I have resolved the second by proposing the notion of "No Protection" 
SAs - i.e. using the IKEv2 to negotiate IP-in-IP tunnels, or use of the 
RFC 3775 Home Address Option/Type 2 Routing Header. Although this seems 
to be counter-intuitive for the IPsec IKE to negotiate off security, the 
benefit is in having a single mechanism to manage unprotected mobile 
communications, when there is also a need for secure mobile communications.

My paper also examines the case where the IKE is used to manage secure 
mobile communications but has no means of authenticating the MN to the 
CN. This appears to be interesting as part of a wider framework, but is 
not of direct interest to aeronautical communications.

I have also investigated possible implications for MN to HA 
communications, and proposed IKEv2/MOBIKE scenarios where Binding 
Updates are no longer needed here. Again, this is not of direct interest 
to aeronautical communications, but should be of wider interest.

Looking back on the paper, although I started writing assuming IPv6 
only, almost everything proposed is also relevant to IPv4. Only the use 
of the RFC 3775 Home Address Option/Type 2 Routing Header is IPv6 specific.

Using the IKE to manage mobility also seems to have some other 
interesting implications. Like it or not, NAT Gateways are well 
supported by IPsec, and a Mobile Node that uses  IKEv2/MOBIKE to manage 
both its HA binding and RO, seems to be able to move behind NAT Gateways 
and then re-emerge without any obvious problems - although this mode of 
operation is limited to ESP tunnels.

Basic NEMO operations should really be just a case of an appropriate set 
of SA Traffic Selectors for MN to SA tunnels. If a PKI exists that 
allows a CN to authenticate a Mobile Router and authorise the routes it 
offers, then the use of the IKE to manage Mobile Router Route 
Optimisation also appears to be an interesting approach. This is very 
relevant to Aeronautical use.

IKEv2/MOBIKE has limited multi-homing capability, in respect of 
supporting the use of multi-homing for increasing availability. Load 
sharing is not part of the current framework. The use of multi-homing 
for increasing availability meets a perceived aeronautical requirement 
to enable high availability of air/ground communications through agility 
in the use of alternative networks. Extension to load sharing seems to a 
suitable topic for future work, but not essential for aeronautical use.

The purpose of this paper is to develop an IPsec based RO strategy 
suitable for aeronautical use and one that is also suitable for similar 
transport infrastructure uses, but I believe the use of IPsec based 
mobility management using IKEv2 and MOBIKE should be of general interest.

Regards

Tony Whyman



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Date: Fri, 4 Apr 2008 14:05:21 +0100
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Pasi, you describe this as the way it is ...but do you have a problem
with that and why?

Thanks
George

On Fri, Apr 4, 2008 at 10:42 AM,  <Pasi.Eronen@nokia.com> wrote:
> Vijay Devarapallli wrote:
>
>  > Without this, you end up using UDP port 4500 for IPsec protected
>  > data traffic between the mobile node and the home agent and the
>  > DS-MIPv6 UDP port for non-IPsec protected data traffic between the
>  > mobile node and the home agent. I would prefer to avoid this.
>
>  In the current spec (version -01) this is precisely the situation:
>  traffic protected with IPsec tunnel mode uses port 4500.
>
>  (BU/BAck is protected with transport mode IPsec, but in that case,
>  the packet also has an IPv6 header, so the TLV-Header type would
>  be IPv6.)
>
>  Best regards,
>  Pasi
>
>
> _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
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From nemo-bounces@ietf.org  Fri Apr  4 06:41:51 2008
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Subject: [nemo] Journal Special Issue on Electronic Health ( Due on May 1)
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NEWS: International Journal of Telemedicine and Applications (IJTA) is
 now available on the public PubMed Central (PMC) site under the U.S.
 National Institutes of Health (NIH). 

International Journal of Telemedicine and Applications (IJTA)
Special Issue Announcement 
Electronic – Health  

Electronic health (E-health) becomes a very important area, involving
 multiple fields, such as health, healthcare, public health, medical
 science, health service, data management, image processing,
 telecommunication, wireless network, operational research, etc. The
purpose of the
 special issue is to provide quick journal paper publications on any
topic
 related to E-Health. Specific areas of interest include (but are not
 limited to):
·        Health promotion, health prevention (e.g. of persons with risk
 factors)
·        Diagnosis, second opinion
·        Treatment, support to treatment
·        E-heath Decision support systems
·        Reducing error in healthcare delivery
·        Hospital based care
·        Ambulatory based care
·        Primary health based care
·        Home care
·        On the move care/support
·        Cross border care
·        Care in developing countries
·        International care
·        Reimbursement issues
·        Legal issues
·        E-heath education issues
·        E-heath change management issues
·        Change the way healthcare is delivered
·        Quality of Patient Care
·        Wireless/Mobile Telemedicine 
·        E-health Data Management 
·        Prevention of Medical Errors
·        E-health information Technology 
·        Reduction of Healthcare Costs
·        Medical Image/Video Processing and Mining
·        Medical resource allocation, Optimization, and Simulation
·        E-health Text Mining
·        E-health Data Warehouses
·        Clinical Decision Support
·        Emergency Care
·        E-health Information Modeling and Integration
·        E-health Information Retrieval, Analysis, Visualization and
 Prediction 
·        E-health Knowledge Discovery
·        Security, Privacy and Trust in E-health
·        Lessons Learned from E-health Information System
 Implementation
·        Tele-homecare and Ubiquitous Healthcare 
·        Tele-presence and Robotics in Healthcare 
·        E-Health Initiatives of World Bodies 
·        Health Monitoring 
·        Emerging Technologies for Rehabilitation
·        Tele-Rehabilitation and Tele-Physiotherapy 
·        Sensor Networks for Patient and Elderly Care 
·        Semantic Web in Healthcare 
·        Navigation Systems for Healthcare 
·        Computing for Human Experience and Wellness 
·        Medical Nomadic Computing 
·        Healthcare Industry Applications 
·        Rural e-HealthCare Management 
·        Healthcare Cost & Financial Analysis 
·        Context-awareness for Smart Space in Healthcare 
·        IT Infrastructures and Platforms for Remote Healthcare 
·        etc.
Authors should follow the International Journal of Telemedicine and
 Applications manuscript format described at the journal site
 http://www.hindawi.com/journals/ijta/. Prospective authors should
 submit an electronic copy of their complete manuscript through the
journal
 Manuscript Tracking System at http://mts.hindawi.com/, according to
the
 following timetable:
Schedule:
·        Submission deadline: May. 1, 2008
·        Notification: Aug. 1, 2008
·        Publication of special issue: Nov. 1 2008


Guest Editors
 
Hui Chen, Virginia State University, USA
E-mail: huichen@ieee.org 
Arnauld Nicogossian, George Mason University, USA
E-mail: anicogoss@cox.net 
Silas Olsson, Healthaccess, Sweden
E-mail: silas.olsson@healthaccess.eu 
Azhar Rafiq, Virginia Commonwealth University, USA
E-mail: fiq@vcu.edu 
Max E. Stachura, Medical College of Georgia, USA
E-mail: MAXS@mail.mcg.edu 
Mamoru Watanabe, University of Calgary, Canada 
E-mail: watanabe@ucalgary.ca 
Pamela Whitten, Michigan State University, USA
E-mail: pwhitten@msu.edu
Yang Xiao, The University of Alabama, USA
E-mail: yangxiao@ieee.org




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Subject: Re: [MEXT] Decisions, and next steps proposed in IETF71 MEXT meeting
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I'm OK with taking on the revision of the docs as requested by the WG;  
if all the issues have been worked out, we can start on that work any  
time.

- Ralph

On Mar 26, 2008, at Mar 26, 2008,11:05 AM, marcelo bagnulo wrote:
> Hi,
>
> During the two MEXT sessions we had at IETF 71, the WG proposed the
> following Action Points and way forward for the different items  
> discussed.
> We attach here a summary of those so that the consensus can be checked
> with the ML. We kindly ask to anyone that has issues/concerns with any
> of the points described below, please comment on the ml.
>
> About WG items:
>
> [...]
>
> Prefix Delegation for NEMO to the IESG
> Strong concensus in the meeting (26 against 2) to work on a DHCP based
> solution to delegate prefixes from the HA to the MR. Next step is for
> authors of the two drafts to work on a unified draft and submit ti the
> WG to decide its adoption.



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Subject: Re: [MEXT] TLV header in DSMIP
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On Fri, Apr 4, 2008 at 2:42 AM,  <Pasi.Eronen@nokia.com> wrote:
> Vijay Devarapallli wrote:
>
>  > Without this, you end up using UDP port 4500 for IPsec protected
>  > data traffic between the mobile node and the home agent and the
>  > DS-MIPv6 UDP port for non-IPsec protected data traffic between the
>  > mobile node and the home agent. I would prefer to avoid this.
>
>  In the current spec (version -01) this is precisely the situation:
>  traffic protected with IPsec tunnel mode uses port 4500.

Ok, got it. I looked at the security considerations section again. I
forgot that in version 06, we mandate that port 4500 is always used
for IPsec protected payload traffic, irrespective of whether we use
vanilla UDP or TLV-header UDP encapsulation. In version 05 and
earlier, we didn't have this restriction. One could use the TLV-header
UDP encapsulation (and the DS-MIPv6 port) for the IPsec protected
payload traffic too.

Since we mandate that port 4500 is always used, it does not make sense
to reserve the 'IPsec Type" value in the TLV header. So, we can remove
that.

Vijay

>  (BU/BAck is protected with transport mode IPsec, but in that case,
>  the packet also has an IPv6 header, so the TLV-Header type would
>  be IPv6.)
>
>  Best regards,
>  Pasi
>
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From: Sri Gundavelli <sgundave@cisco.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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On Fri, 4 Apr 2008, Vijay Devarapallli wrote:

> On Fri, Apr 4, 2008 at 2:42 AM,  <Pasi.Eronen@nokia.com> wrote:
>> Vijay Devarapallli wrote:
>>
>> > Without this, you end up using UDP port 4500 for IPsec protected
>> > data traffic between the mobile node and the home agent and the
>> > DS-MIPv6 UDP port for non-IPsec protected data traffic between the
>> > mobile node and the home agent. I would prefer to avoid this.
>>
>>  In the current spec (version -01) this is precisely the situation:
>>  traffic protected with IPsec tunnel mode uses port 4500.
>
> Ok, got it. I looked at the security considerations section again. I
> forgot that in version 06, we mandate that port 4500 is always used
> for IPsec protected payload traffic, irrespective of whether we use
> vanilla UDP or TLV-header UDP encapsulation. In version 05 and
> earlier, we didn't have this restriction. One could use the TLV-header
> UDP encapsulation (and the DS-MIPv6 port) for the IPsec protected
> payload traffic too.
>

I dont follow this. If port 4500 is in use, 3947/3948 considerations
apply. Where does the use of TLV specified ? ESP decapsulation
starts right after UDP header.

Sri



> Since we mandate that port 4500 is always used, it does not make sense
> to reserve the 'IPsec Type" value in the TLV header. So, we can remove
> that.
>





> Vijay
>
>>  (BU/BAck is protected with transport mode IPsec, but in that case,
>>  the packet also has an IPv6 header, so the TLV-Header type would
>>  be IPv6.)
>>
>>  Best regards,
>>  Pasi
>>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>
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Subject: Re: [MEXT] TLV header in DSMIP
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> -----Original Message-----
> From: Hesham Soliman [mailto:hesham@elevatemobile.com] 
> Sent: Thursday, April 03, 2008 10:51 PM
> To: Sri Gundavelli
> Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> Subject: Re: [MEXT] TLV header in DSMIP
> 
> 
> On 04/04/2008, at 2:29 PM, Sri Gundavelli wrote:
> >
> >>>
> >>>
> >>> IPv4-UDP-ESP-GRE-(IPv4, IPv6) -- 3948 is in use, UDP port 4500.
> >>> IPv4-UDP-TLV-GRE-(IPv4, IPv6) -- DSMIP6 port.
> >>>
> >>> This is ok.
> >>
> >> => If you want to have ESP come right after the TLV then 
> please send
> >> some text to describe this behaviour in terms of IPsec
> >> operation. I'm
> >> trying to avoid extending the IPsec
> >> mess in the spec to strange cases that need more inquiries and more
> >> time at this stage. So I'd rather have that specified elsewhere.
> >> I think the easiest thing now is to do the format I sent above and
> >> later if you want to add ESP/AH ...etc then you can specify
> >> that in a
> >> draft.
> >>
> >
> > Sure. I understand the pain dealing with all these IPsec issues that
> > were raised in the last few months.
> >
> > However, on this, probably there is not much to specify. 
> Atleast from
> > an implementation angle, its matter of implementing a 
> tunnel interface
> > with a given encap mode and the ESP header just goes after the TLV,
> > just as how 3948 allows ESP right after UDP. We can borrow some text
> > from Sec 3.4 [3948]. Its just one more encap layer after UDP.
> 
> => Sri, if you think there is not much to do here then please 
> send text.

I can provide the text, if there is agreement that we are using
DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
what is the port number that is in use. 4500 or the DSMIP port ?

Sri


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Subject: Re: [MEXT] TLV header in DSMIP
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>
> I can provide the text, if there is agreement that we are using
> DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
> what is the port number that is in use. 4500 or the DSMIP port ?

=> I don't think we need the text now, there is agreement to remove  
this.
We're using 4500 for secure traffic and DSMIP port for other traffic.

Hesham

>
>
> Sri
>
>

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Subject: Re: [MEXT] Decisions,
	and next steps proposed in IETF71 MEXT 	meeting
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the sooner the better :-)

the deadline for this work was on march 2008, so we are already late

Thanks, marcelo


Ralph Droms <rdroms@cisco.com> dijo:

> I'm OK with taking on the revision of the docs as requested by the 
> WG;  if all the issues have been worked out, we can start on that 
> work any  time.
>
> - Ralph
>
> On Mar 26, 2008, at Mar 26, 2008,11:05 AM, marcelo bagnulo wrote:
>> Hi,
>>
>> During the two MEXT sessions we had at IETF 71, the WG proposed the
>> following Action Points and way forward for the different items  discussed.
>> We attach here a summary of those so that the consensus can be checked
>> with the ML. We kindly ask to anyone that has issues/concerns with any
>> of the points described below, please comment on the ml.
>>
>> About WG items:
>>
>> [...]
>>
>> Prefix Delegation for NEMO to the IESG
>> Strong concensus in the meeting (26 against 2) to work on a DHCP based
>> solution to delegate prefixes from the HA to the MR. Next step is for
>> authors of the two drafts to work on a unified draft and submit ti the
>> WG to decide its adoption.
>
>
>
>



-- 
----
MARCELO BAGNULO BRAUN
WebCartero
Universidad Carlos III de Madrid

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From: "Vijay Devarapallli" <dvijay@gmail.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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Hi Sri

On Sat, Apr 5, 2008 at 12:10 AM, Sri Gundavelli <sgundave@cisco.com> wrote:

> > Ok, got it. I looked at the security considerations section again. I
> > forgot that in version 06, we mandate that port 4500 is always used
> > for IPsec protected payload traffic, irrespective of whether we use
> > vanilla UDP or TLV-header UDP encapsulation. In version 05 and
> > earlier, we didn't have this restriction. One could use the TLV-header
> > UDP encapsulation (and the DS-MIPv6 port) for the IPsec protected
> > payload traffic too.
>
>  I dont follow this. If port 4500 is in use, 3947/3948 considerations
>  apply. Where does the use of TLV specified ? ESP decapsulation
>  starts right after UDP header.

In version 06, the security considerations section mandates that

- For IPsec protected payload traffic, port 4500 is used
- For non-IPsec protected payload traffic, the DS-MIPv6 UDP port is used
- When the DS-MIPv6 UDP port is used, you have the option of using
plain UDP encapsulation or TLV-header UDP encapsulation. That is
negotiated with the BU/BAck exchange.

Messy, but we have to live with it since we have two different NAT
traversal mechanisms (IKEv2 and DS-MIPv6) being used at the same time.

Vijay
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Subject: Re: [MEXT] TLV header in DSMIP
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Hi Vijay,
 
> >  I dont follow this. If port 4500 is in use, 3947/3948 
> considerations
> >  apply. Where does the use of TLV specified ? ESP decapsulation
> >  starts right after UDP header.
> 
> In version 06, the security considerations section mandates that
> 
> - For IPsec protected payload traffic, port 4500 is used
> - For non-IPsec protected payload traffic, the DS-MIPv6 UDP 
> port is used
> - When the DS-MIPv6 UDP port is used, you have the option of using
> plain UDP encapsulation or TLV-header UDP encapsulation. That is
> negotiated with the BU/BAck exchange.
> 


Ok. So, this is what I said last week (see below) ..Use
of two ports 4500 when using ESP and DSMIP6 port when
using TLV (offcourse when not using TLV as well) and
when ESP is not in use. This allows one to use GRE
encap in all modes, secure or non-secure and for IPv4
or IPv6 payload traffic. The comment was that "3948 is
not used for IPv6", ...what in this will not work ? Cannot
carry IPv6 traffic over port 4500 ? If there is no issue
here, we all are on the same page.

---
> Sent: Thursday, April 03, 2008 2:44 PM
> From: Sri Gundavelli
> ...
> ...
> So, we assume 3948 scheme is in use and since ESP has the
> semantics to identify the contained types ...
> 
> IPv4-UDP-ESP-GRE-(IPv4, IPv6) -- 3948 is in use, UDP port 4500.
> IPv4-UDP-TLV-GRE-(IPv4, IPv6) -- DSMIP6 port.
>  
> This is ok.

> =>[Hesham]  Not really, 3948 is not used for IPv6, so we can't assume that
for  
> all cases.
>
---


> Messy, but we have to live with it since we have two different NAT
> traversal mechanisms (IKEv2 and DS-MIPv6) being used at the same time.
> 

I understand.


Thanks
Sri

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From: "Sri Gundavelli" <sgundave@cisco.com>
To: "'Hesham Soliman'" <hesham@elevatemobile.com>
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Cc: Pasi.Eronen@nokia.com, mext@ietf.org
Subject: Re: [MEXT] TLV header in DSMIP
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> -----Original Message-----
> From: Hesham Soliman [mailto:hesham@elevatemobile.com] 
> Sent: Saturday, April 05, 2008 1:32 AM
> To: Sri Gundavelli
> Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> Subject: Re: [MEXT] TLV header in DSMIP
> 
> >
> > I can provide the text, if there is agreement that we are using
> > DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
> > what is the port number that is in use. 4500 or the DSMIP port ?
> 
> => I don't think we need the text now, there is agreement to remove  
> this.
> We're using 4500 for secure traffic and DSMIP port for other traffic.
> 


Ok. I've no issue using 4500 when using ESP and DSMIP port for non-ESP
traffic. Offcourse, we could have just used DSMIP port and relied on
one NAT traversal mechanism ...

Sri


> Hesham
> 
> >
> >
> > Sri
> >
> >
> 

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Subject: [MEXT] IETF71 minutes
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Hi, please find the minutes attached, let me know if you want changes

Mobility EXTensions for IPv6 (MEXT)

Minutes for IETF-71 meeting
====================================

Chairs:
Julien Laganier <julien.ietf@laposte.net>
Marcelo Bagnulo Braun <marcelo@it.uc3m.es>

Scribes:
Gerardo Giaretta
Sri Gundavelli
Suresh Krishnan

Sessions:
WEDNESDAY, March 12, 2008
0900-1130 Morning Session I

THURSDAY, March 13, 2008
0900-1130 Morning Session I

Minutes:

- Status of MEXT deliverables
  Chairs

DSMIPv6: dealing with Pasi's comments. Still outstanding comments. Last
changes can be done when the revision is done for IESG

MCoA: new version after George's comments. New WGLC

AAA goals: new ID needed. After that send to IESG

RO for Personal Mobile Router: no WG draft yet. There is a possible
candidate but comments and reviews must be needed

RO for automobile: new draft accepted as WG item. Need more comments

RO for aircraft: finished the WGLC but good shape and the group can
start working on solutions

PD for NEMO: ongoing discussion to be discussed today

Solution for aircraft RO: work on solutions starts now

RADIUS MIPv6: new version to be discussed today

Analysis of use of MCoA: Monami6 document updated long time ago. No
input for now. Input needed. It deals also with multiple HoAs

Multiple Interfaces motivations and scenario: Monami6 document. Review
needed. Situation similar of the previous document.

Mobile IPv6 operation with firewalls: no WG item but output of a DT. To
be discussed today

MIB for NEMO: WGLC after IETF

Flow/Binding Policy: draft by Hesham accepted as a WG item. Still
waiting for the draft which will be available at the next IETF

Flow Binding policy format: no WG item yet. Two drafts should be merged.

Update of RFC 3775: several comments in the mailing list. A compilation
of all proposed items to be discussed today.

Home Agent reliability: authors say the document is ready. Most comments
received were editorial. The document will be updated

o Recharter items under discussion

One item needs more discussion, which is the p2p home link model.

- Home Link operation over p2p links
draft-sarikaya-mext-homelink-prefix-delegation-00.txt
Bechet

Prefix Management issue when the p2p link is a home link
CFG_REQUEST triggers DHCP signaling
Francis, Julien and Gerardo: no protocol work. How the HA gets the
prefixes is up to the deployment or the system architecture.
Frank: p2p model implies that there is a prefix per MN while in the
shared link there is an address per MN
Tom Taylor: people need to work on the problem and expose better the
problem to the WG

- MIPv6 home link operation in various SDOs
draft-devarapalli-mext-mipv6-home-link-00.txt
Vijay

Jouni presents the slides on behalf of Vijay.
MIPv6 used in other SDOs with some links designated as home links.
Booting up in a p2p link which is supposed to be the home link needs
some considerations
Hesham, Gerardo clarified that the home link detection is done comparing
the IKEv2 prefix and RA prefix
George: an informational document which explains how to do this without
requiring new protocol work
Hesham: OK with an Information document but no need for changes
Julien clarified that there is a p2p link which handles the routing.
There is no state at the HA, so the "HA" is just acting as AR and sends
the downlink packets to the MN
Gerardo: no need for service selection in the BU as there are already
solutions in the p2p link negotiation
George and Suresh: no need for protocol work, probably worth clarifying
Gerardo: an informational document describing how
IKEv2 MIP6_HOME_PREFIX is used to detect the home link. No specific
Jouni: no protocol work.
Ahmad: problem statement needs clarification.
Raj: the scenario is not clear and should be discussed in the mailing
list
George: write a charter paragraph which describes what the problem is
and discuss it in the mailing list

Next Step: George proposal

o MEXT Deliverables

- Multiple Care-of Addresses Registration
draft-ietf-monami6-multiplecoa-06.txt
Ryuji

Several comments after the WGLC on version 5
3 remaining issues. WGLC on version 7 after this IETF
Sequence Number issue. Proposal: MN should manage the SN value for all
bindings
Enhanced RO: not clear if MCoA works with this. Additional review needed
Simultaneous Home and Foreign attachment: HA intercepts all packets and
decides to send the traffic directly to HoA on link or tunnel to CoA.
MN sets the H bit in the BID option for the interface in the home link
Julien: to get the L2 addresses, ND must be used and L2 headers should
not be considered for this purpose
Sri: how the packet is sent via the home link?
Ryuji: MN sends traffic to the HA
George: this is not modifying the proxy ND but some special treatment is
needed
Ryuji: MN is not defending the address on the home link
Sri: take this offline to check

SN issue is solved.
Enhanced RO: review needed
Simultaneous Home and Foreign attachment: text needed and then discuss
on the list

- Automotive Industry Requirements for NEMO
Route Optimization
draft-ietf-mext-nemo-ro-automotive-req-00
Roberto Baldessari

RO scenarios
Requirements
- separability: switching to RO is subject to policy table to avoid
unnecessary RO sessions
- security: MNP ownership should be checked against off-path attackers.
Requirement to be extended for better protection. Certificates can be
used
Marcelo, Hesham: saying there is a certificate assumes already a
solution
Julien: proof of ownership of the prefix may be a good wording
Francis: authorization of prefix is better than proof of ownership
- privacy protection. Exposing MNP must be limited to CE and nodes on
the path MR-CE
Julien: privacy is not the right term as HNP does not give information
of privacy
Marcelo: if you use a prefix to figure out how many times one is in a
foreign link, you have a privacy issue
Requirement will be rephrased
- multihoming
- efficient signaling. Text in the draft is outdated
- switching HA. Considered in ISO CALM. RO should not prevent it from
working
Marcelo: is this related to multiple HoAs?
Not clear. Needs to find out if it is different HoAs or not
William: is this for reliability of the HA or for the RO?
Marcelo: whatever RO solution it must be compatible with HA reliability
solutions

- NEMO Route Optimization Requirements for
Operational Use in Aeronautics
and Space Exploration Mobile Networks
draft-ietf-mext-aero-reqs-01
Wesley Eddy

Believed to be ready for WGLC
Changed requirement on loss to also require NOT duplicting packets
Biggest change in Security Requirement
Old was IPsec MUST be usable
New requirement is clearer.
Hesham: why is it safe to assume trust relationship between MR and
mobility anchor points topologically near to CNs?
Alex: Was it considered RO neighbor correspondent nodes?
It seems not desirable.
Marcelo: the solution can work with both CN and a box nearby. The
security requirements for this are stronger than the 3775 RO. No on-path
attackers are accepted.
Alex: this deserves further discussion on the list
Fred: interactions between the global routing and RO. Global RO may not
have a direct route. Can RO survive? One or two packets may be lost, one
being the BU
Wesley: BU may not go through but you can still use the HoA
Marcelo: there is a scalability requirement to not cope with global
routing
Fred: need a couple of weeks to look at this
Marcelo: we need to close this re document in the short term
Alex: need to empahasize that session continuity is provided via RO

Next Steps: document is in good shape. Comment on the next two weeks. A
new version will be produced.

- DHCPv6 Relay Agents and NEMO
draft-dupont-mext-dhcrelay-00.txt
Francis Dupont

Francis thinks neither of them can get consensus and that is why we need a
solution with relays. He Talks about the advantages of these
Francis has implemented DHCP code twice and know that relays are small and
straightforward. Putting relays at two ends is a nice way of 
encapsulating dhcp traffic.
He thinks it is a nice way of getting consensus
Julien points out that only one of the proposals uses DHCP
Francis says the other one can use a DHCP message piggybacked on a BU/BA
Julien does not see the point in optimizing PD. It happens rarely and 
not on critical path
George mentions that the good thing about this proposal is that there is 
no need to do
any protocol work. He thinks that the draft is unclear but can be fixed
Sri wants to compare this to the Thubert/Droms draft
Alex thinks the diff b/w this doc and the Thubert/Droms draft is the 
encapsulation of the
DHCP packets. He is not sure it can work
Francis is aware of someone who uses this.
Alex agrees that it is worth exploring as a solution
Behcet discussed this on monday at DHC Ralph mentioned that this requires
standardization.
Behcet posted 2 drafts on this issue and he seeks comments
  
Julien wants to know about the security of this mechanism
Francis mentions it is just like DHCP (no security). He mentions the 
DHCP auth option
Alex mentions that multicast and anycast are hard to secure
Francis mentions you can use IPsec
  
Ryuji wants to know how to configure the DHCP server on the relay
Francis mentions there is a list of servers configured on the relay
You can use an anycast scope (all servers and relays>ll scope)
  
Francis believes it is good to put a relay or a server on the HA
  
Ryuji says that the main diff between the Thubert/Droms doc is if we put 
the relay on the
MR. Maybe we can update the T/D doc.
  
Fred Templin is working on colocating the relay and server the same node 
in autoconf
  
Teco Boot agrees to update the T/D doc and then try to get consensus
  
Sri wants to know what happens after the tunnel disappears. How does the 
DHCP relay
work? Will the DHCP packets get routed to HA
  
Behcet thinks that the tunnel vanishes after the MR returns home
  
George wants to mention that once you deregister from the HA the 
prefixes obtained
from DHCP are gone.
  
Sri and George to discuss this later on the ML.
  
Sri wants to couple the eventual solution to the mobility signaling
  
Marcelo wants to know if the nemo pd draft can use the contents of this 
draft to fix these
issues?
  
Alex supports both the proposals. He thinks we are going too fast for 
the market and it
is too early to choose. Hence we can take our time.
  
Alex wants a list of solutions instead of just one.
  
Marcelo wants to pick just one.
  
Teco thinks that if the DHCP has to disappear with the tunnel, then the 
DHCP PD
is not an option.
  
Francis mentions the DHCP release message
  
Jari confirms Marcelo's view that we can do only one solution. if we 
cannot decide
we should do nothing. He wants to see some direction from wg
  
Behcet agrees with Jari but the authors are not present.
  
TJ (through Ryuji) wants to know why we cannot use dynamic dns for 
mobility?
  
Francis thinks DHCP PD should be based on DHCPv6
  
Julien thinks PD entails state keeping in the DHCP server. there is no 
choice
  
George mentions that DHCP-pd is used over lte, pmip and dsmip links 
  
Consensus for DHCPv6 prefix delegation - to be confirmed in the mailing
list.
Votes: 26 votes support for using DHCP based approah/ 2 votes support
BU based approach

- Guidelines for firewall vendors regarding MIPv6 traffic
draft-krishnan-mip6-firewall-vendor-03
Guidelines for firewall administrators regarding MIPv6 traffic
draft-krishnan-mip6-firewall-admin-03
All - 15 min

Nobody has read them
Marcelo gives the room 10 minutes to read and comment
  
Henrik wants to reduce timeout for the state from 420 sec to something
more reasonable
  
Jari thinks that the document is talking about generic IPv6 issues as well.
He wants to scope down the document and remove these things.
  
Marcelo and Sri want one document (not -admin and -vendor)
  
Suresh disagrees with them. He thinks the audience for the two documents
is different and hence they should be separate.
  
Henrik agrees with Suresh. It makes the documents clear and concise. He
thinks vendors like concise documents like the firewall-vendor draft.
  
Sri thinks it can be a section inside the combined document.
  
Henrik wants a smaller document focussed at SOHO router vendors
  
Jari thinks the merge/split document is not the right discussions. He 
wants to
discuss next steps
  
Marcelo wants to address Jari's comments to pull out general ipv6 stuff
from doc and then ask for adoption
 
- RADIUS Mobile IPv6 Support
draft-ietf-mip6-radius-04.txt
Kuntal

Radius MIP6 support skipped since there is nobody to present
  
- RFC 3775 update
Chairs - 15 min
     
DHAAD removal issue

Jari wants to see if the functionality has been implemented and used
if it is not, it is fine to remove
Gerardo thinks that we are removing something that has been outdated
by other work (e.g. bootstrapping work)
Jari thinks we need to also judge future interest
Alex knows about 2 implementations of dhaad
Alex thinks the scenarios for bootstrapping are different than those for 
dhaad
He wants to know if diameter has outdated radius, has ikev2 outdated ikev2
Gerardo clarifies that he did not mean bootstrap work was more advanced but
it is more adopted and used
Charlie wants this discussion to be done on ml
Sri has an implementation and does not want to remove
George agrees with sri to keep it but he wants the security implications 
to be
clarified
Jean-Michel mentiones IKEv1 is obsoleted by IKEv2
Alex does not care and thinks people will still use IKEv1
Jari thinks there is support to keep in the doc
Marcelo wants to have some diff text about the security issues
Sri wants to leverage existing text
Alex mentions there is already language in rfc3775
Jean-Michel sent some text to ML and Alex agrees with it
  
BA/Berr sent by HA
  
Alex and Ryuji think HAs can already send BRR/Berr
Jari thinks that binding errors can be sent by both HAs and CNs. He also
thinks that this was the intent and the text in RFC3775 is unclear about 
the
term CN
Jari and Alex need to agree about BRRs
Deng Hui needs clarification since he faced the problem with HA switch
messages
  
Returning home
  
Sri agrees to switch SHOULD to MUST
George wants to keep the SHOULD. He wants the capability to decide
when to send
Sri and Jari mention it is a MUST when the node wants to start using
its home address
The chairs will accept new issues for 3 months and then try to close them
Henrik wants all the issues to be tracked in the issue tracker
  
 
o New Charter Items

- Binding Revocation for IP Mobility
Ahmad Muhanna presented by Sri

Jari has reviewd the document and is fairly in a solid shape. However,
the document is written with more focus on the usecases. Authors must
publish the new document and fix it

Sri agrees that the document needs to be restructured, says that the
authors planned to define the mechanism in a generic way and list some
examples at the end  
  

- Generic Notification Message for Mobile IPv6
Sri  

Henrik asks why this draft is not listing the most obvious example that
is Revocation use case in the examples for this mechanism and why there
is a seperate draft for Revocation

Sri answers that we dont specify receiver action in generic notification 
mechanism
Revocation requires specification on the event peer and requires more
focus.

Sri mentions that  also, notification mechanism provides a generic 
container for
all events. We should not use up the MH number space for every event
and so we need to define a number space for one MH type.

Sri mentions that some people suggested that the revocation mechanism should
make use of the number space from the notification draft

Gerardo says that then it is ok if Revocation uses one of the sub-type

- Virtual Home Link configuration for Mobile IPv6
Sri
  
Hesham thinks anycast is no different in v6 than in v4. He thinks the 
only difference
is a reserved prefix in v6 for link specific anycast
Ryuji mentions that rfc3775 assumes that prefix is a /64
Vijay thinks that there is a specific prefix reserved for DHAAD anycast
Suresh mentions that it is a reserved interface identifier and not a prefix
Discussion to continue on list
Acee wants to know if this doc will be informational
Sri thinks so
  
- Extend DSMIPv6 Home Network Support
George
  
Domagoj wants to know about the usage scenarios. e.g. v4 HoA as the CoA
for the v6 HoA

o Other topics

- Alt-CoA check
draft-arkko-mext-rfc3775-altcoa-check-01.txt
Jari

Hesham is neutral to this change it is good because this can be enabled and
disabled on the receiver based on the info in the BU
Jari mentions that text changes needed to FMIP and have been made
Jari mentions fmip has a more specific rule for alt-coa handling FMIP
Ryuji mentions that MCOA does not use Alt-CoA and so there is no 
conflict b/w
this proposal and monami6 work but Jari thinks the problem still exists
Do we trust the node to just check one of the addresses in the packet?
He has not thought much about this yet
Sri wants to know if there is a configuration knob
Jari mentions that it is tuned on by default but can be turned off
Ryuji wants to mention whether the src address or alt-coa will be used 
by the HA
Christian wants some kind of negotiation between the HA and the MN to 
see if
it is turned on
Jari does not like to have negotiation
George mentions there is no point negotiating with a potential attacker
Alex wants more granularity (per HoA basis)
Jari wants to take some time to see if we can accomodate the mcoa stuff 
in this
doc within say 3 months
  
- Residual threat analysis
draft-haddad-mext-mip6-residual-threats-01.txt
Geroge

George solicits more inputs on threats
Francis thinks attacks are very easy if we are attached to multiple 
links (at least
one of the valid CoAs is used)
Julien wants to know how CGA helps
Suresh mentions that it prevents flooding a specific address but not 
flooding a link
Jean-Michel wants to know if the work takes into account the work done 
in sava/savi
Marcelo wants to document the threats first and then decide what to do 
with them later.
The scope of the work is threats that are SPECIFIC to mipv6
Hesham wants to know about ingress filtering stats
George mentions that we can create optional mechanisms that only 
paranoid people
turn on
Christian Vogt mentions 25% of internet addresses can be spoofed and 
savi wg is
more limited only source address validation on local link
Francis mentions that there are attacks that do not use source addresses 
and they
cannot be covered by ingress filtering
Marcelo wants to cover all cases not just CoA address issues
Jari wants to focus the document without making huge claims
Jari mentions that the relationship between the HA and Mn is traceable. 
Anonymous
HAs would be a good idea but they do not exist
George mentions that the device can be traced, but not the user e.g. SIM
Jari mentions that a SIM can be traced to a user
George says not in Europe
Jean-Michel says that is not true in France
George says we will not do this for France.
(laughter)
Jari mentions that this work might have an effect on MCOA and hence we 
need to
analyze the effects
  
- Simultaneous Mobility Problem Statement
draft-wong-mext-simultaneous-ps-00.txt
D. Wong
  
Hesham wants to know whether we are documenting or trying to solve
Francis mentions that rh + hao as suggested is worse than tunneling and 
is a
security nightmare
Suresh mentions that he and Wassim had a draft 4 years ago that dealt 
with the
same issue and there was no interest in solving it. It was called 
Binding Update
Backhauling.
  


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From: "Sri Gundavelli" <sgundave@cisco.com>
To: "'Hesham Soliman'" <hesham@elevatemobile.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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Hi Hesham,

Also, can you please clarify the operation for this
below scenarioe. We are updating our PMIP6 IPv4 document
and we are not clear how this scenario works, in liu of
the latest DSMIP6 resolutions. Some clarifications will
help.

When ESP is used only for control traffic and not for data
traffic, how does the NAT traversal scheme work ? The NAT
mappings for both the flows are different, howz the relation
maintained ?

My Assumption: IPv4 transport in use, NAT in path and
the resolution that the port 4500 is used for secure
ESP traffic and for non secure traffic DSMIP port is
used. 

Operation: 
===========
- MN sends MIP BU encapsulated in UDP to port 4500

- NAT binding is created on the NAT device, having a
  relation to src port of the BU, port 4500, IPv4-private-coa,
  IPv4-public-coa and HA-V4-Address
 
- HA creates a tunnel with UDP encap and with the above 
  properties (Src/Dest ports)

- If MN or HA needs to forward data traffic and unprotected,
  does it needs to be sent to port 4500 or DSMIP port ?
  We cannot send non-ESP traffic to port 4500.

- If this is sent to DSMIP port, what triggers the new NAT
  mapping and howz the tunnel encap header modified on the HA ?

- How do keepalives work ?

Appreciate your time on this.


Regards
Sri
  

 

> -----Original Message-----
> From: Hesham Soliman [mailto:hesham@elevatemobile.com] 
> Sent: Saturday, April 05, 2008 1:32 AM
> To: Sri Gundavelli
> Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> Subject: Re: [MEXT] TLV header in DSMIP
> 
> >
> > I can provide the text, if there is agreement that we are using
> > DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
> > what is the port number that is in use. 4500 or the DSMIP port ?
> 
> => I don't think we need the text now, there is agreement to remove  
> this.
> We're using 4500 for secure traffic and DSMIP port for other traffic.
> 
> Hesham
> 
> >
> >
> > Sri
> >
> >
> 

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From mext-bounces@ietf.org  Mon Apr  7 02:37:29 2008
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Hi Marcelo,

marcelo bagnulo wrote:
> Flow Binding policy format: no WG item yet. Two drafts should be merged.
>   
We have merged draft-larsson-monami6-filter-rules and 
draft-mitsuya-monami6-flow-distribution-policy and submitted it as 
draft-larsson-mext-flow-distribution-rules. This was done in November 2007.

/Conny

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BTW, I've stated several times that I believe that an average
implementor (i.e., someone who hasn't participated in writing this
specification and doesn't have a PhD) can't actually figure out how
the DSMIPv6/IPsec interaction works based on the current spec
(which is already in much better shape than earlier versions).

I do understand that Hesham as the editor cannot (and should not) 
fix this alone -- so I would really appreciate if other WG members
would help with writing the needed text. 

I've suggested e.g. showing packets (both before and after IPsec 
processing) with their headers to show what traffic is sent from/to 
which port (and how IPsec interacts with this). In particular, 
"using 4500 for secure traffic and DSMIP port for other traffic" 
is *not* what the current spec says.

Could someone from the WG volunteer to produce those packet diagrams,
and propose improved text around those diagrams?

(My apologies for being blunt, but I'd rather see this fixed before
the draft comes to IESG -- remember that the ADs who have to ballot 
"Yes" or "No objection" mostly haven't participated in writing this 
spec, and don't have PhDs.)

Best regards,
Pasi

> -----Original Message-----
> From: ext Sri Gundavelli [mailto:sgundave@cisco.com] 
> Sent: 07 April, 2008 07:12
> To: 'Hesham Soliman'
> Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
> Subject: RE: [MEXT] TLV header in DSMIP
> 
> Hi Hesham,
> 
> Also, can you please clarify the operation for this
> below scenarioe. We are updating our PMIP6 IPv4 document
> and we are not clear how this scenario works, in liu of
> the latest DSMIP6 resolutions. Some clarifications will
> help.
> 
> When ESP is used only for control traffic and not for data
> traffic, how does the NAT traversal scheme work ? The NAT
> mappings for both the flows are different, howz the relation
> maintained ?
> 
> My Assumption: IPv4 transport in use, NAT in path and
> the resolution that the port 4500 is used for secure
> ESP traffic and for non secure traffic DSMIP port is
> used. 
> 
> Operation: 
> ===========
> - MN sends MIP BU encapsulated in UDP to port 4500
> 
> - NAT binding is created on the NAT device, having a
>   relation to src port of the BU, port 4500, IPv4-private-coa,
>   IPv4-public-coa and HA-V4-Address
>  
> - HA creates a tunnel with UDP encap and with the above 
>   properties (Src/Dest ports)
> 
> - If MN or HA needs to forward data traffic and unprotected,
>   does it needs to be sent to port 4500 or DSMIP port ?
>   We cannot send non-ESP traffic to port 4500.
> 
> - If this is sent to DSMIP port, what triggers the new NAT
>   mapping and howz the tunnel encap header modified on the HA ?
> 
> - How do keepalives work ?
> 
> Appreciate your time on this.
> 
> 
> Regards
> Sri
>   
>
> > -----Original Message-----
> > From: Hesham Soliman [mailto:hesham@elevatemobile.com] 
> > Sent: Saturday, April 05, 2008 1:32 AM
> > To: Sri Gundavelli
> > Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> > Subject: Re: [MEXT] TLV header in DSMIP
> > 
> > >
> > > I can provide the text, if there is agreement that we are using
> > > DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
> > > what is the port number that is in use. 4500 or the DSMIP port ?
> > 
> > => I don't think we need the text now, there is agreement 
> > to remove  this. We're using 4500 for secure traffic and DSMIP port 
> > for other traffic.
> > 
> > Hesham
> > 
> > >
> > >
> > > Sri
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Thread-Topic: [MEXT] TLV header in DSMIP
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Subject: Re: [MEXT] TLV header in DSMIP
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Well... I can't say that I like it, but it probably works. And 
none of the other solutions (like adding a new DSMIPv6 specific
payload to IKE, or running a separate copy of IKE/IPsec for DSMIPv6)
were very good either.

Best regards,
Pasi 

> -----Original Message-----
> From: ext George Tsirtsis [mailto:tsirtsis@googlemail.com] 
> Sent: 04 April, 2008 16:05
> To: Eronen Pasi (Nokia-NRC/Helsinki)
> Cc: dvijay@gmail.com; hesham@elevatemobile.com; mext@ietf.org
> Subject: Re: [MEXT] TLV header in DSMIP
> 
> Pasi, you describe this as the way it is ...but do you have a problem
> with that and why?
> 
> Thanks
> George
> 
> On Fri, Apr 4, 2008 at 10:42 AM,  <Pasi.Eronen@nokia.com> wrote:
> > Vijay Devarapallli wrote:
> >
> >  > Without this, you end up using UDP port 4500 for IPsec protected
> >  > data traffic between the mobile node and the home agent and the
> >  > DS-MIPv6 UDP port for non-IPsec protected data traffic 
> >  > between the
> >  > mobile node and the home agent. I would prefer to avoid this.
> >
> >  In the current spec (version -01) this is precisely the situation:
> >  traffic protected with IPsec tunnel mode uses port 4500.
> >
> >  (BU/BAck is protected with transport mode IPsec, but in that case,
> >  the packet also has an IPv6 header, so the TLV-Header type would
> >  be IPv6.)
> >
> >  Best regards,
> >  Pasi
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So, if people can comment on this new merged draft we can try to figure =

out what would be the next steps for this

Regards, marcelo


Conny Larsson escribi=F3:
> Hi Marcelo,
>
> marcelo bagnulo wrote:
>> Flow Binding policy format: no WG item yet. Two drafts should be merged.
>>   =

> We have merged draft-larsson-monami6-filter-rules and =

> draft-mitsuya-monami6-flow-distribution-policy and submitted it as =

> draft-larsson-mext-flow-distribution-rules. This was done in November =

> 2007.
>
> /Conny
>
>

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> BTW, I've stated several times that I believe that an average
> implementor (i.e., someone who hasn't participated in writing this
> specification and doesn't have a PhD) can't actually figure out how
> the DSMIPv6/IPsec interaction works based on the current spec
> (which is already in much better shape than earlier versions).

=> Actually that comment was on an older version but feel free to make  
it now again :)

>
>
> I do understand that Hesham as the editor cannot (and should not)
> fix this alone -- so I would really appreciate if other WG members
> would help with writing the needed text.
>
> I've suggested e.g. showing packets (both before and after IPsec
> processing) with their headers to show what traffic is sent from/to
> which port (and how IPsec interacts with this). In particular,
> "using 4500 for secure traffic and DSMIP port for other traffic"
> is *not* what the current spec says.

=> George and Wassim have volunteered to do this, thanks guys.

Hesham


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Subject: [MEXT] WGLC on draft-ietf-mext-nemo-mib-00
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Hi,

We are now starting the WGLC for draft-ietf-mext-nemo-mib-00, which will 
close on april 21st 2008.
Please, send comments to the list before that date.

For your convenience, the document can be found:

http://www.ietf.org/internet-drafts/draft-ietf-mext-nemo-mib-00.txt

Regards, Julien and marcelo

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Subject: Re: [MEXT] TLV header in DSMIP
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Well, I have volunteered and indicated that Wassim will probably help,
but have not asked him yet :-)
Note that I am not convinced that diagrams are really appropriate for
the packet descriptions...I will have to look at that. In any case the
idea is to provide clear description of packet headers before and
after IPSEC processing in various cases.

Regards
George

On Mon, Apr 7, 2008 at 12:25 PM, Hesham Soliman
<hesham@elevatemobile.com> wrote:
>
>  > BTW, I've stated several times that I believe that an average
>  > implementor (i.e., someone who hasn't participated in writing this
>  > specification and doesn't have a PhD) can't actually figure out how
>  > the DSMIPv6/IPsec interaction works based on the current spec
>  > (which is already in much better shape than earlier versions).
>
>  => Actually that comment was on an older version but feel free to make
>  it now again :)
>
>
>  >
>  >
>  > I do understand that Hesham as the editor cannot (and should not)
>  > fix this alone -- so I would really appreciate if other WG members
>  > would help with writing the needed text.
>  >
>  > I've suggested e.g. showing packets (both before and after IPsec
>  > processing) with their headers to show what traffic is sent from/to
>  > which port (and how IPsec interacts with this). In particular,
>  > "using 4500 for secure traffic and DSMIP port for other traffic"
>  > is *not* what the current spec says.
>
>  => George and Wassim have volunteered to do this, thanks guys.
>
>  Hesham
>
>
>
>
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
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From: "Sri Gundavelli" <sgundave@cisco.com>
To: <Pasi.Eronen@nokia.com>
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Date: Mon, 7 Apr 2008 07:55:50 -0700
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Cc: mext@ietf.org
Subject: Re: [MEXT] TLV header in DSMIP
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I'm not sure how the NAT traversal scheme works if only
control traffic is enabled for IPsec protection and
not the data traffic. 3775 clearly allows this and is
probably the most default mechanism given the crypto
hardware accelerator requirements on the boxes. In this
scenario of MN using a private address and behind a NAT,
there will be two NAT flows and not sure how they are
tied. This is not an issue in 3775, a secured MIP control
packets result in a L3 tunnel and its optional if ESP
is enabled on that tunnel for data traffic. Given the port
4500 for ESP only traffic, not sure how non-ESP traffic
can be sent there. Especially the initial packets from CN
to MN, when there is no NAT mapping for that flow ...

May be I'm missing some thing basic ... if this is already
discussed and worked out ...some clarifications or pointers
to the draft will help ...

Sri



> -----Original Message-----
> From: Pasi.Eronen@nokia.com [mailto:Pasi.Eronen@nokia.com] 
> Sent: Monday, April 07, 2008 3:06 AM
> To: sgundave@cisco.com
> Cc: mext@ietf.org
> Subject: RE: [MEXT] TLV header in DSMIP
> 
> 
> BTW, I've stated several times that I believe that an average
> implementor (i.e., someone who hasn't participated in writing this
> specification and doesn't have a PhD) can't actually figure out how
> the DSMIPv6/IPsec interaction works based on the current spec
> (which is already in much better shape than earlier versions).
> 
> I do understand that Hesham as the editor cannot (and should not) 
> fix this alone -- so I would really appreciate if other WG members
> would help with writing the needed text. 
> 
> I've suggested e.g. showing packets (both before and after IPsec 
> processing) with their headers to show what traffic is sent from/to 
> which port (and how IPsec interacts with this). In particular, 
> "using 4500 for secure traffic and DSMIP port for other traffic" 
> is *not* what the current spec says.
> 
> Could someone from the WG volunteer to produce those packet diagrams,
> and propose improved text around those diagrams?
> 
> (My apologies for being blunt, but I'd rather see this fixed before
> the draft comes to IESG -- remember that the ADs who have to ballot 
> "Yes" or "No objection" mostly haven't participated in writing this 
> spec, and don't have PhDs.)
> 
> Best regards,
> Pasi
> 
> > -----Original Message-----
> > From: ext Sri Gundavelli [mailto:sgundave@cisco.com] 
> > Sent: 07 April, 2008 07:12
> > To: 'Hesham Soliman'
> > Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
> > Subject: RE: [MEXT] TLV header in DSMIP
> > 
> > Hi Hesham,
> > 
> > Also, can you please clarify the operation for this
> > below scenarioe. We are updating our PMIP6 IPv4 document
> > and we are not clear how this scenario works, in liu of
> > the latest DSMIP6 resolutions. Some clarifications will
> > help.
> > 
> > When ESP is used only for control traffic and not for data
> > traffic, how does the NAT traversal scheme work ? The NAT
> > mappings for both the flows are different, howz the relation
> > maintained ?
> > 
> > My Assumption: IPv4 transport in use, NAT in path and
> > the resolution that the port 4500 is used for secure
> > ESP traffic and for non secure traffic DSMIP port is
> > used. 
> > 
> > Operation: 
> > ===========
> > - MN sends MIP BU encapsulated in UDP to port 4500
> > 
> > - NAT binding is created on the NAT device, having a
> >   relation to src port of the BU, port 4500, IPv4-private-coa,
> >   IPv4-public-coa and HA-V4-Address
> >  
> > - HA creates a tunnel with UDP encap and with the above 
> >   properties (Src/Dest ports)
> > 
> > - If MN or HA needs to forward data traffic and unprotected,
> >   does it needs to be sent to port 4500 or DSMIP port ?
> >   We cannot send non-ESP traffic to port 4500.
> > 
> > - If this is sent to DSMIP port, what triggers the new NAT
> >   mapping and howz the tunnel encap header modified on the HA ?
> > 
> > - How do keepalives work ?
> > 
> > Appreciate your time on this.
> > 
> > 
> > Regards
> > Sri
> >   
> >
> > > -----Original Message-----
> > > From: Hesham Soliman [mailto:hesham@elevatemobile.com] 
> > > Sent: Saturday, April 05, 2008 1:32 AM
> > > To: Sri Gundavelli
> > > Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> > > Subject: Re: [MEXT] TLV header in DSMIP
> > > 
> > > >
> > > > I can provide the text, if there is agreement that we are using
> > > > DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
> > > > what is the port number that is in use. 4500 or the DSMIP port ?
> > > 
> > > => I don't think we need the text now, there is agreement 
> > > to remove  this. We're using 4500 for secure traffic and 
> DSMIP port 
> > > for other traffic.
> > > 
> > > Hesham
> > > 
> > > >
> > > >
> > > > Sri

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Date: Mon, 7 Apr 2008 16:57:14 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Sri Gundavelli" <sgundave@cisco.com>
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Cc: Pasi.Eronen@nokia.com, mext@ietf.org
Subject: Re: [MEXT] TLV header in DSMIP
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Hi Sri,

In the case you describe, why do you think the two flows must be tied
in some fashion?

From IPSEC perspective only one flow is secured, so the other flow
(tunneled data) is irrelevant. Tunneled data are then sent with
unsecured UDP encapsulation using the DSMIPv6 port number, as defined
in the draft i.e., IPv4/IPv6 over UDP, or GRE/TLV over UDP

Did I miss the point of your question?

Regards
George

On Mon, Apr 7, 2008 at 3:55 PM, Sri Gundavelli <sgundave@cisco.com> wrote:
> I'm not sure how the NAT traversal scheme works if only
>  control traffic is enabled for IPsec protection and
>  not the data traffic. 3775 clearly allows this and is
>  probably the most default mechanism given the crypto
>  hardware accelerator requirements on the boxes. In this
>  scenario of MN using a private address and behind a NAT,
>  there will be two NAT flows and not sure how they are
>  tied.
> This is not an issue in 3775, a secured MIP control
>  packets result in a L3 tunnel and its optional if ESP
>  is enabled on that tunnel for data traffic. Given the port
>  4500 for ESP only traffic, not sure how non-ESP traffic
>  can be sent there. Especially the initial packets from CN
>  to MN, when there is no NAT mapping for that flow ...
>
>  May be I'm missing some thing basic ... if this is already
>  discussed and worked out ...some clarifications or pointers
>  to the draft will help ...
>
>  Sri
>
>
>
>
>
>  > -----Original Message-----
>  > From: Pasi.Eronen@nokia.com [mailto:Pasi.Eronen@nokia.com]
>  > Sent: Monday, April 07, 2008 3:06 AM
>  > To: sgundave@cisco.com
>  > Cc: mext@ietf.org
>  > Subject: RE: [MEXT] TLV header in DSMIP
>  >
>  >
>  > BTW, I've stated several times that I believe that an average
>  > implementor (i.e., someone who hasn't participated in writing this
>  > specification and doesn't have a PhD) can't actually figure out how
>  > the DSMIPv6/IPsec interaction works based on the current spec
>  > (which is already in much better shape than earlier versions).
>  >
>  > I do understand that Hesham as the editor cannot (and should not)
>  > fix this alone -- so I would really appreciate if other WG members
>  > would help with writing the needed text.
>  >
>  > I've suggested e.g. showing packets (both before and after IPsec
>  > processing) with their headers to show what traffic is sent from/to
>  > which port (and how IPsec interacts with this). In particular,
>  > "using 4500 for secure traffic and DSMIP port for other traffic"
>  > is *not* what the current spec says.
>  >
>  > Could someone from the WG volunteer to produce those packet diagrams,
>  > and propose improved text around those diagrams?
>  >
>  > (My apologies for being blunt, but I'd rather see this fixed before
>  > the draft comes to IESG -- remember that the ADs who have to ballot
>  > "Yes" or "No objection" mostly haven't participated in writing this
>  > spec, and don't have PhDs.)
>  >
>  > Best regards,
>  > Pasi
>  >
>  > > -----Original Message-----
>  > > From: ext Sri Gundavelli [mailto:sgundave@cisco.com]
>  > > Sent: 07 April, 2008 07:12
>  > > To: 'Hesham Soliman'
>  > > Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
>  > > Subject: RE: [MEXT] TLV header in DSMIP
>  > >
>  > > Hi Hesham,
>  > >
>  > > Also, can you please clarify the operation for this
>  > > below scenarioe. We are updating our PMIP6 IPv4 document
>  > > and we are not clear how this scenario works, in liu of
>  > > the latest DSMIP6 resolutions. Some clarifications will
>  > > help.
>  > >
>  > > When ESP is used only for control traffic and not for data
>  > > traffic, how does the NAT traversal scheme work ? The NAT
>  > > mappings for both the flows are different, howz the relation
>  > > maintained ?
>  > >
>  > > My Assumption: IPv4 transport in use, NAT in path and
>  > > the resolution that the port 4500 is used for secure
>  > > ESP traffic and for non secure traffic DSMIP port is
>  > > used.
>  > >
>  > > Operation:
>  > > ===========
>  > > - MN sends MIP BU encapsulated in UDP to port 4500
>  > >
>  > > - NAT binding is created on the NAT device, having a
>  > >   relation to src port of the BU, port 4500, IPv4-private-coa,
>  > >   IPv4-public-coa and HA-V4-Address
>  > >
>  > > - HA creates a tunnel with UDP encap and with the above
>  > >   properties (Src/Dest ports)
>  > >
>  > > - If MN or HA needs to forward data traffic and unprotected,
>  > >   does it needs to be sent to port 4500 or DSMIP port ?
>  > >   We cannot send non-ESP traffic to port 4500.
>  > >
>  > > - If this is sent to DSMIP port, what triggers the new NAT
>  > >   mapping and howz the tunnel encap header modified on the HA ?
>  > >
>  > > - How do keepalives work ?
>  > >
>  > > Appreciate your time on this.
>  > >
>  > >
>  > > Regards
>  > > Sri
>  > >
>  > >
>  > > > -----Original Message-----
>  > > > From: Hesham Soliman [mailto:hesham@elevatemobile.com]
>  > > > Sent: Saturday, April 05, 2008 1:32 AM
>  > > > To: Sri Gundavelli
>  > > > Cc: mext@ietf.org; Pasi.Eronen@nokia.com
>  > > > Subject: Re: [MEXT] TLV header in DSMIP
>  > > >
>  > > > >
>  > > > > I can provide the text, if there is agreement that we are using
>  > > > > DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
>  > > > > what is the port number that is in use. 4500 or the DSMIP port ?
>  > > >
>  > > > => I don't think we need the text now, there is agreement
>  > > > to remove  this. We're using 4500 for secure traffic and
>  > DSMIP port
>  > > > for other traffic.
>  > > >
>  > > > Hesham
>  > > >
>  > > > >
>  > > > >
>  > > > > Sri
>
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
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https://www.ietf.org/mailman/listinfo/mext


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From: "Sri Gundavelli" <sgundave@cisco.com>
To: "'George Tsirtsis'" <tsirtsis@googlemail.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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Hi George,



 
> Hi Sri,
> 
> In the case you describe, why do you think the two flows must be tied
> in some fashion?
> 
> From IPSEC perspective only one flow is secured, so the other flow
> (tunneled data) is irrelevant. Tunneled data are then sent with
> unsecured UDP encapsulation using the DSMIPv6 port number, as defined
> in the draft i.e., IPv4/IPv6 over UDP, or GRE/TLV over UDP
> 

After the signaling is complete, there should be tunnel encaps
with proper UDP port numbers on both ends for sending the data
traffic. If we treat them separate, how does the HA know what
encap to use for the initial traffic comming from the CN towards
the MN (Note that the signaling is complete and there is a NAT
state for the signaling flow and no data traffic yet from the
MN and so there is no NAT state for the second flow). MN is
behind a NAT and so the trigger needs to come from the MN for
the second flow.

Secondly, if the two flows are not tied, how does keepalive
messaging work for keeping the NAT states active ? Will there be
two NAT keepalive messaging for both the flows ?

Also, the two flows needs to be tied for removing the data path
upon terminating the MIP session.

Thanks
Sri




> Did I miss the point of your question?
> 
> Regards
> George
> 
> On Mon, Apr 7, 2008 at 3:55 PM, Sri Gundavelli 
> <sgundave@cisco.com> wrote:
> > I'm not sure how the NAT traversal scheme works if only
> >  control traffic is enabled for IPsec protection and
> >  not the data traffic. 3775 clearly allows this and is
> >  probably the most default mechanism given the crypto
> >  hardware accelerator requirements on the boxes. In this
> >  scenario of MN using a private address and behind a NAT,
> >  there will be two NAT flows and not sure how they are
> >  tied.
> > This is not an issue in 3775, a secured MIP control
> >  packets result in a L3 tunnel and its optional if ESP
> >  is enabled on that tunnel for data traffic. Given the port
> >  4500 for ESP only traffic, not sure how non-ESP traffic
> >  can be sent there. Especially the initial packets from CN
> >  to MN, when there is no NAT mapping for that flow ...
> >
> >  May be I'm missing some thing basic ... if this is already
> >  discussed and worked out ...some clarifications or pointers
> >  to the draft will help ...
> >
> >  Sri
> >
> >
> >
> >
> >
> >  > -----Original Message-----
> >  > From: Pasi.Eronen@nokia.com [mailto:Pasi.Eronen@nokia.com]
> >  > Sent: Monday, April 07, 2008 3:06 AM
> >  > To: sgundave@cisco.com
> >  > Cc: mext@ietf.org
> >  > Subject: RE: [MEXT] TLV header in DSMIP
> >  >
> >  >
> >  > BTW, I've stated several times that I believe that an average
> >  > implementor (i.e., someone who hasn't participated in 
> writing this
> >  > specification and doesn't have a PhD) can't actually 
> figure out how
> >  > the DSMIPv6/IPsec interaction works based on the current spec
> >  > (which is already in much better shape than earlier versions).
> >  >
> >  > I do understand that Hesham as the editor cannot (and should not)
> >  > fix this alone -- so I would really appreciate if other 
> WG members
> >  > would help with writing the needed text.
> >  >
> >  > I've suggested e.g. showing packets (both before and after IPsec
> >  > processing) with their headers to show what traffic is 
> sent from/to
> >  > which port (and how IPsec interacts with this). In particular,
> >  > "using 4500 for secure traffic and DSMIP port for other traffic"
> >  > is *not* what the current spec says.
> >  >
> >  > Could someone from the WG volunteer to produce those 
> packet diagrams,
> >  > and propose improved text around those diagrams?
> >  >
> >  > (My apologies for being blunt, but I'd rather see this 
> fixed before
> >  > the draft comes to IESG -- remember that the ADs who 
> have to ballot
> >  > "Yes" or "No objection" mostly haven't participated in 
> writing this
> >  > spec, and don't have PhDs.)
> >  >
> >  > Best regards,
> >  > Pasi
> >  >
> >  > > -----Original Message-----
> >  > > From: ext Sri Gundavelli [mailto:sgundave@cisco.com]
> >  > > Sent: 07 April, 2008 07:12
> >  > > To: 'Hesham Soliman'
> >  > > Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
> >  > > Subject: RE: [MEXT] TLV header in DSMIP
> >  > >
> >  > > Hi Hesham,
> >  > >
> >  > > Also, can you please clarify the operation for this
> >  > > below scenarioe. We are updating our PMIP6 IPv4 document
> >  > > and we are not clear how this scenario works, in liu of
> >  > > the latest DSMIP6 resolutions. Some clarifications will
> >  > > help.
> >  > >
> >  > > When ESP is used only for control traffic and not for data
> >  > > traffic, how does the NAT traversal scheme work ? The NAT
> >  > > mappings for both the flows are different, howz the relation
> >  > > maintained ?
> >  > >
> >  > > My Assumption: IPv4 transport in use, NAT in path and
> >  > > the resolution that the port 4500 is used for secure
> >  > > ESP traffic and for non secure traffic DSMIP port is
> >  > > used.
> >  > >
> >  > > Operation:
> >  > > ===========
> >  > > - MN sends MIP BU encapsulated in UDP to port 4500
> >  > >
> >  > > - NAT binding is created on the NAT device, having a
> >  > >   relation to src port of the BU, port 4500, IPv4-private-coa,
> >  > >   IPv4-public-coa and HA-V4-Address
> >  > >
> >  > > - HA creates a tunnel with UDP encap and with the above
> >  > >   properties (Src/Dest ports)
> >  > >
> >  > > - If MN or HA needs to forward data traffic and unprotected,
> >  > >   does it needs to be sent to port 4500 or DSMIP port ?
> >  > >   We cannot send non-ESP traffic to port 4500.
> >  > >
> >  > > - If this is sent to DSMIP port, what triggers the new NAT
> >  > >   mapping and howz the tunnel encap header modified on the HA ?
> >  > >
> >  > > - How do keepalives work ?
> >  > >
> >  > > Appreciate your time on this.
> >  > >
> >  > >
> >  > > Regards
> >  > > Sri
> >  > >
> >  > >
> >  > > > -----Original Message-----
> >  > > > From: Hesham Soliman [mailto:hesham@elevatemobile.com]
> >  > > > Sent: Saturday, April 05, 2008 1:32 AM
> >  > > > To: Sri Gundavelli
> >  > > > Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> >  > > > Subject: Re: [MEXT] TLV header in DSMIP
> >  > > >
> >  > > > >
> >  > > > > I can provide the text, if there is agreement that 
> we are using
> >  > > > > DSMIP port and the TLV-ESP follows the UDP. I'm 
> bit confused, on
> >  > > > > what is the port number that is in use. 4500 or 
> the DSMIP port ?
> >  > > >
> >  > > > => I don't think we need the text now, there is agreement
> >  > > > to remove  this. We're using 4500 for secure traffic and
> >  > DSMIP port
> >  > > > for other traffic.
> >  > > >
> >  > > > Hesham
> >  > > >
> >  > > > >
> >  > > > >
> >  > > > > Sri
> >
> >  _______________________________________________
> >  MEXT mailing list
> >  MEXT@ietf.org
> >  https://www.ietf.org/mailman/listinfo/mext
> >

_______________________________________________
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Date: Mon, 7 Apr 2008 17:29:43 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Sri Gundavelli" <sgundave@cisco.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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Hi again ...inline...

On Mon, Apr 7, 2008 at 5:11 PM, Sri Gundavelli <sgundave@cisco.com> wrote:
> Hi George,
>
>
>
>
>
>  > Hi Sri,
>  >
>  > In the case you describe, why do you think the two flows must be tied
>  > in some fashion?
>  >
>  > From IPSEC perspective only one flow is secured, so the other flow
>  > (tunneled data) is irrelevant. Tunneled data are then sent with
>  > unsecured UDP encapsulation using the DSMIPv6 port number, as defined
>  > in the draft i.e., IPv4/IPv6 over UDP, or GRE/TLV over UDP
>  >
>
>  After the signaling is complete, there should be tunnel encaps
>  with proper UDP port numbers on both ends for sending the data
>  traffic. If we treat them separate, how does the HA know what
>  encap to use for the initial traffic comming from the CN towards
>  the MN (Note that the signaling is complete and there is a NAT
>  state for the signaling flow and no data traffic yet from the
>  MN and so there is no NAT state for the second flow). MN is
>  behind a NAT and so the trigger needs to come from the MN for
>  the second flow.
>

GT> Yes, which means that the MN must immediately start sending
keepalives for the data traffic i.e., to the DSMIPv6 port number. This
allows the tunnel to be open for outgoing as well as incomming
sessions. The draft has language to this effect already.

>  Secondly, if the two flows are not tied, how does keepalive
>  messaging work for keeping the NAT states active ? Will there be
>  two NAT keepalive messaging for both the flows ?
>

GT> If both of the flows need to be maintained then I think we need
two keepalives. It is not clear to me, however, why we need to
maintain the signaling flow in that case, since we might not have to
send another BU for hours; or am I missing something?
GT> In any case the cost of two keepalives is probably lower than the
cost of turning on encryption which then only requires a single
keepalive. Also note that sending two keepalives is not that bad for
the MN since most of the cost of keepalives is in the fact that the MN
must come out of sleep mode to transmit something. Once the MN wakes
up, transmitting one vs two small packets makes little difference.
There is of course processing cost at the HA side to consider too.

>  Also, the two flows needs to be tied for removing the data path
>  upon terminating the MIP session.
>

GT> Yes I think they are still tied in the HA based on the HoA, no?

BR,
George
>
>
>
>
>
>
>  > Did I miss the point of your question?
>  >
>  > Regards
>  > George
>  >
>  > On Mon, Apr 7, 2008 at 3:55 PM, Sri Gundavelli
>  > <sgundave@cisco.com> wrote:
>  > > I'm not sure how the NAT traversal scheme works if only
>  > >  control traffic is enabled for IPsec protection and
>  > >  not the data traffic. 3775 clearly allows this and is
>  > >  probably the most default mechanism given the crypto
>  > >  hardware accelerator requirements on the boxes. In this
>  > >  scenario of MN using a private address and behind a NAT,
>  > >  there will be two NAT flows and not sure how they are
>  > >  tied.
>  > > This is not an issue in 3775, a secured MIP control
>  > >  packets result in a L3 tunnel and its optional if ESP
>  > >  is enabled on that tunnel for data traffic. Given the port
>  > >  4500 for ESP only traffic, not sure how non-ESP traffic
>  > >  can be sent there. Especially the initial packets from CN
>  > >  to MN, when there is no NAT mapping for that flow ...
>  > >
>  > >  May be I'm missing some thing basic ... if this is already
>  > >  discussed and worked out ...some clarifications or pointers
>  > >  to the draft will help ...
>  > >
>  > >  Sri
>  > >
>  > >
>  > >
>  > >
>  > >
>  > >  > -----Original Message-----
>  > >  > From: Pasi.Eronen@nokia.com [mailto:Pasi.Eronen@nokia.com]
>  > >  > Sent: Monday, April 07, 2008 3:06 AM
>  > >  > To: sgundave@cisco.com
>  > >  > Cc: mext@ietf.org
>  > >  > Subject: RE: [MEXT] TLV header in DSMIP
>  > >  >
>  > >  >
>  > >  > BTW, I've stated several times that I believe that an average
>  > >  > implementor (i.e., someone who hasn't participated in
>  > writing this
>  > >  > specification and doesn't have a PhD) can't actually
>  > figure out how
>  > >  > the DSMIPv6/IPsec interaction works based on the current spec
>  > >  > (which is already in much better shape than earlier versions).
>  > >  >
>  > >  > I do understand that Hesham as the editor cannot (and should not)
>  > >  > fix this alone -- so I would really appreciate if other
>  > WG members
>  > >  > would help with writing the needed text.
>  > >  >
>  > >  > I've suggested e.g. showing packets (both before and after IPsec
>  > >  > processing) with their headers to show what traffic is
>  > sent from/to
>  > >  > which port (and how IPsec interacts with this). In particular,
>  > >  > "using 4500 for secure traffic and DSMIP port for other traffic"
>  > >  > is *not* what the current spec says.
>  > >  >
>  > >  > Could someone from the WG volunteer to produce those
>  > packet diagrams,
>  > >  > and propose improved text around those diagrams?
>  > >  >
>  > >  > (My apologies for being blunt, but I'd rather see this
>  > fixed before
>  > >  > the draft comes to IESG -- remember that the ADs who
>  > have to ballot
>  > >  > "Yes" or "No objection" mostly haven't participated in
>  > writing this
>  > >  > spec, and don't have PhDs.)
>  > >  >
>  > >  > Best regards,
>  > >  > Pasi
>  > >  >
>  > >  > > -----Original Message-----
>  > >  > > From: ext Sri Gundavelli [mailto:sgundave@cisco.com]
>  > >  > > Sent: 07 April, 2008 07:12
>  > >  > > To: 'Hesham Soliman'
>  > >  > > Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
>  > >  > > Subject: RE: [MEXT] TLV header in DSMIP
>  > >  > >
>  > >  > > Hi Hesham,
>  > >  > >
>  > >  > > Also, can you please clarify the operation for this
>  > >  > > below scenarioe. We are updating our PMIP6 IPv4 document
>  > >  > > and we are not clear how this scenario works, in liu of
>  > >  > > the latest DSMIP6 resolutions. Some clarifications will
>  > >  > > help.
>  > >  > >
>  > >  > > When ESP is used only for control traffic and not for data
>  > >  > > traffic, how does the NAT traversal scheme work ? The NAT
>  > >  > > mappings for both the flows are different, howz the relation
>  > >  > > maintained ?
>  > >  > >
>  > >  > > My Assumption: IPv4 transport in use, NAT in path and
>  > >  > > the resolution that the port 4500 is used for secure
>  > >  > > ESP traffic and for non secure traffic DSMIP port is
>  > >  > > used.
>  > >  > >
>  > >  > > Operation:
>  > >  > > ===========
>  > >  > > - MN sends MIP BU encapsulated in UDP to port 4500
>  > >  > >
>  > >  > > - NAT binding is created on the NAT device, having a
>  > >  > >   relation to src port of the BU, port 4500, IPv4-private-coa,
>  > >  > >   IPv4-public-coa and HA-V4-Address
>  > >  > >
>  > >  > > - HA creates a tunnel with UDP encap and with the above
>  > >  > >   properties (Src/Dest ports)
>  > >  > >
>  > >  > > - If MN or HA needs to forward data traffic and unprotected,
>  > >  > >   does it needs to be sent to port 4500 or DSMIP port ?
>  > >  > >   We cannot send non-ESP traffic to port 4500.
>  > >  > >
>  > >  > > - If this is sent to DSMIP port, what triggers the new NAT
>  > >  > >   mapping and howz the tunnel encap header modified on the HA ?
>  > >  > >
>  > >  > > - How do keepalives work ?
>  > >  > >
>  > >  > > Appreciate your time on this.
>  > >  > >
>  > >  > >
>  > >  > > Regards
>  > >  > > Sri
>  > >  > >
>  > >  > >
>  > >  > > > -----Original Message-----
>  > >  > > > From: Hesham Soliman [mailto:hesham@elevatemobile.com]
>  > >  > > > Sent: Saturday, April 05, 2008 1:32 AM
>  > >  > > > To: Sri Gundavelli
>  > >  > > > Cc: mext@ietf.org; Pasi.Eronen@nokia.com
>  > >  > > > Subject: Re: [MEXT] TLV header in DSMIP
>  > >  > > >
>  > >  > > > >
>  > >  > > > > I can provide the text, if there is agreement that
>  > we are using
>  > >  > > > > DSMIP port and the TLV-ESP follows the UDP. I'm
>  > bit confused, on
>  > >  > > > > what is the port number that is in use. 4500 or
>  > the DSMIP port ?
>  > >  > > >
>  > >  > > > => I don't think we need the text now, there is agreement
>  > >  > > > to remove  this. We're using 4500 for secure traffic and
>  > >  > DSMIP port
>  > >  > > > for other traffic.
>  > >  > > >
>  > >  > > > Hesham
>  > >  > > >
>  > >  > > > >
>  > >  > > > >
>  > >  > > > > Sri
>  > >
>  > >  _______________________________________________
>  > >  MEXT mailing list
>  > >  MEXT@ietf.org
>  > >  https://www.ietf.org/mailman/listinfo/mext
>  > >
>
>
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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From: RYUJI WAKIKAWA <ryuji.wakikawa@gmail.com>
To: "Sri Gundavelli" <sgundave@cisco.com>
In-Reply-To: <003401c898c9$fd297460$d4f6200a@amer.cisco.com>
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Cc: Pasi.Eronen@nokia.com, mext@ietf.org
Subject: Re: [MEXT] TLV header in DSMIP
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Hi Sri,

On 2008/04/08, at 1:11, Sri Gundavelli wrote:
> Hi George,
>
>> Hi Sri,
>>
>> In the case you describe, why do you think the two flows must be tied
>> in some fashion?
>>
>> From IPSEC perspective only one flow is secured, so the other flow
>> (tunneled data) is irrelevant. Tunneled data are then sent with
>> unsecured UDP encapsulation using the DSMIPv6 port number, as defined
>> in the draft i.e., IPv4/IPv6 over UDP, or GRE/TLV over UDP
>>
>
> After the signaling is complete, there should be tunnel encaps
> with proper UDP port numbers on both ends for sending the data
> traffic. If we treat them separate, how does the HA know what
> encap to use for the initial traffic comming from the CN towards
> the MN (Note that the signaling is complete and there is a NAT
> state for the signaling flow and no data traffic yet from the
> MN and so there is no NAT state for the second flow). MN is
> behind a NAT and so the trigger needs to come from the MN for
> the second flow.

I think this is an issue.

After binding registration, MN should trigger some packet to the HA  
using the
DSMIP port in order to create NAT state for non-ESP data flow.
Otherwise, NAT box may drop the packets tunneled by HA
because there is no NAT state for the UDP packets (DSMIP port).

> Secondly, if the two flows are not tied, how does keepalive
> messaging work for keeping the NAT states active ? Will there be
> two NAT keepalive messaging for both the flows ?

DSMIP uses BU/BA exchange for the keepalive. BU/BA will be sent with  
the 4500 port.
We don't have keepalive mechanism for data flow (DSMIP port) in the  
current spec.

regards,
ryuji

> Also, the two flows needs to be tied for removing the data path
> upon terminating the MIP session.
>
> Thanks
> Sri
>
>
>
>
>> Did I miss the point of your question?
>>
>> Regards
>> George
>>
>> On Mon, Apr 7, 2008 at 3:55 PM, Sri Gundavelli
>> <sgundave@cisco.com> wrote:
>>> I'm not sure how the NAT traversal scheme works if only
>>> control traffic is enabled for IPsec protection and
>>> not the data traffic. 3775 clearly allows this and is
>>> probably the most default mechanism given the crypto
>>> hardware accelerator requirements on the boxes. In this
>>> scenario of MN using a private address and behind a NAT,
>>> there will be two NAT flows and not sure how they are
>>> tied.
>>> This is not an issue in 3775, a secured MIP control
>>> packets result in a L3 tunnel and its optional if ESP
>>> is enabled on that tunnel for data traffic. Given the port
>>> 4500 for ESP only traffic, not sure how non-ESP traffic
>>> can be sent there. Especially the initial packets from CN
>>> to MN, when there is no NAT mapping for that flow ...
>>>
>>> May be I'm missing some thing basic ... if this is already
>>> discussed and worked out ...some clarifications or pointers
>>> to the draft will help ...
>>>
>>> Sri
>>>
>>>
>>>
>>>
>>>
>>>> -----Original Message-----
>>>> From: Pasi.Eronen@nokia.com [mailto:Pasi.Eronen@nokia.com]
>>>> Sent: Monday, April 07, 2008 3:06 AM
>>>> To: sgundave@cisco.com
>>>> Cc: mext@ietf.org
>>>> Subject: RE: [MEXT] TLV header in DSMIP
>>>>
>>>>
>>>> BTW, I've stated several times that I believe that an average
>>>> implementor (i.e., someone who hasn't participated in
>> writing this
>>>> specification and doesn't have a PhD) can't actually
>> figure out how
>>>> the DSMIPv6/IPsec interaction works based on the current spec
>>>> (which is already in much better shape than earlier versions).
>>>>
>>>> I do understand that Hesham as the editor cannot (and should not)
>>>> fix this alone -- so I would really appreciate if other
>> WG members
>>>> would help with writing the needed text.
>>>>
>>>> I've suggested e.g. showing packets (both before and after IPsec
>>>> processing) with their headers to show what traffic is
>> sent from/to
>>>> which port (and how IPsec interacts with this). In particular,
>>>> "using 4500 for secure traffic and DSMIP port for other traffic"
>>>> is *not* what the current spec says.
>>>>
>>>> Could someone from the WG volunteer to produce those
>> packet diagrams,
>>>> and propose improved text around those diagrams?
>>>>
>>>> (My apologies for being blunt, but I'd rather see this
>> fixed before
>>>> the draft comes to IESG -- remember that the ADs who
>> have to ballot
>>>> "Yes" or "No objection" mostly haven't participated in
>> writing this
>>>> spec, and don't have PhDs.)
>>>>
>>>> Best regards,
>>>> Pasi
>>>>
>>>>> -----Original Message-----
>>>>> From: ext Sri Gundavelli [mailto:sgundave@cisco.com]
>>>>> Sent: 07 April, 2008 07:12
>>>>> To: 'Hesham Soliman'
>>>>> Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
>>>>> Subject: RE: [MEXT] TLV header in DSMIP
>>>>>
>>>>> Hi Hesham,
>>>>>
>>>>> Also, can you please clarify the operation for this
>>>>> below scenarioe. We are updating our PMIP6 IPv4 document
>>>>> and we are not clear how this scenario works, in liu of
>>>>> the latest DSMIP6 resolutions. Some clarifications will
>>>>> help.
>>>>>
>>>>> When ESP is used only for control traffic and not for data
>>>>> traffic, how does the NAT traversal scheme work ? The NAT
>>>>> mappings for both the flows are different, howz the relation
>>>>> maintained ?
>>>>>
>>>>> My Assumption: IPv4 transport in use, NAT in path and
>>>>> the resolution that the port 4500 is used for secure
>>>>> ESP traffic and for non secure traffic DSMIP port is
>>>>> used.
>>>>>
>>>>> Operation:
>>>>> ===========
>>>>> - MN sends MIP BU encapsulated in UDP to port 4500
>>>>>
>>>>> - NAT binding is created on the NAT device, having a
>>>>>  relation to src port of the BU, port 4500, IPv4-private-coa,
>>>>>  IPv4-public-coa and HA-V4-Address
>>>>>
>>>>> - HA creates a tunnel with UDP encap and with the above
>>>>>  properties (Src/Dest ports)
>>>>>
>>>>> - If MN or HA needs to forward data traffic and unprotected,
>>>>>  does it needs to be sent to port 4500 or DSMIP port ?
>>>>>  We cannot send non-ESP traffic to port 4500.
>>>>>
>>>>> - If this is sent to DSMIP port, what triggers the new NAT
>>>>>  mapping and howz the tunnel encap header modified on the HA ?
>>>>>
>>>>> - How do keepalives work ?
>>>>>
>>>>> Appreciate your time on this.
>>>>>
>>>>>
>>>>> Regards
>>>>> Sri
>>>>>
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Hesham Soliman [mailto:hesham@elevatemobile.com]
>>>>>> Sent: Saturday, April 05, 2008 1:32 AM
>>>>>> To: Sri Gundavelli
>>>>>> Cc: mext@ietf.org; Pasi.Eronen@nokia.com
>>>>>> Subject: Re: [MEXT] TLV header in DSMIP
>>>>>>
>>>>>>>
>>>>>>> I can provide the text, if there is agreement that
>> we are using
>>>>>>> DSMIP port and the TLV-ESP follows the UDP. I'm
>> bit confused, on
>>>>>>> what is the port number that is in use. 4500 or
>> the DSMIP port ?
>>>>>>
>>>>>> => I don't think we need the text now, there is agreement
>>>>>> to remove  this. We're using 4500 for secure traffic and
>>>> DSMIP port
>>>>>> for other traffic.
>>>>>>
>>>>>> Hesham
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Sri
>>>
>>> _______________________________________________
>>> MEXT mailing list
>>> MEXT@ietf.org
>>> https://www.ietf.org/mailman/listinfo/mext
>>>
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

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From: "Sri Gundavelli" <sgundave@cisco.com>
To: "'George Tsirtsis'" <tsirtsis@googlemail.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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> >  After the signaling is complete, there should be tunnel encaps
> >  with proper UDP port numbers on both ends for sending the data
> >  traffic. If we treat them separate, how does the HA know what
> >  encap to use for the initial traffic comming from the CN towards
> >  the MN (Note that the signaling is complete and there is a NAT
> >  state for the signaling flow and no data traffic yet from the
> >  MN and so there is no NAT state for the second flow). MN is
> >  behind a NAT and so the trigger needs to come from the MN for
> >  the second flow.
> >
> 
> GT> Yes, which means that the MN must immediately start sending
> keepalives for the data traffic i.e., to the DSMIPv6 port number. This
> allows the tunnel to be open for outgoing as well as incomming
> sessions. The draft has language to this effect already.
> 

I will take a look at the draft again, I missed this language.
Also, requires some text in Security Considerations (quite a bit
of text in 3519 related to this, it has the "R" bit support and
the HA keeps the tunnel in half-created state .. very similar).
Need to understand the implications of this ...



> >  Secondly, if the two flows are not tied, how does keepalive
> >  messaging work for keeping the NAT states active ? Will there be
> >  two NAT keepalive messaging for both the flows ?
> >
> 
> GT> If both of the flows need to be maintained then I think we need
> two keepalives. It is not clear to me, however, why we need to
> maintain the signaling flow in that case, since we might not have to
> send another BU for hours; or am I missing something?

All along during DSMIP6 discussions, the general though from the
Authors was that we dont need a seperate KA mechanism, we can very
well use BU/BA and that changes now. If we dont keep the NAT mapping
active for the  control flow, HA cannot send any asynchronous events
such as  Revocation or Notification events.




> GT> In any case the cost of two keepalives is probably lower than the
> cost of turning on encryption which then only requires a single
> keepalive. Also note that sending two keepalives is not that bad for
> the MN since most of the cost of keepalives is in the fact that the MN
> must come out of sleep mode to transmit something. Once the MN wakes
> up, transmitting one vs two small packets makes little difference.
> There is of course processing cost at the HA side to consider too.
> 

Sure, there needs to be two keepalives. One in control and the
other in data plane. I assume the KA for control is still BU/BA ?
For data flow, how will this be achieved ?


> >  Also, the two flows needs to be tied for removing the data path
> >  upon terminating the MIP session.
> >
> 
> GT> Yes I think they are still tied in the HA based on the HoA, no?
> 

HoA is just a route over the tunnel. The tunnel endpoints with
src/dest address and port numbers, needs to be reflected in the
BCE. Implementation wise, its very difficult to locate a tunnel
by looking at the routing table.

Sri

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From: "Sri Gundavelli" <sgundave@cisco.com>
To: "'RYUJI WAKIKAWA'" <ryuji.wakikawa@gmail.com>
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Cc: Pasi.Eronen@nokia.com, mext@ietf.org
Subject: Re: [MEXT] TLV header in DSMIP
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Hi Ryuji,

> >
> > After the signaling is complete, there should be tunnel encaps
> > with proper UDP port numbers on both ends for sending the data
> > traffic. If we treat them separate, how does the HA know what
> > encap to use for the initial traffic comming from the CN towards
> > the MN (Note that the signaling is complete and there is a NAT
> > state for the signaling flow and no data traffic yet from the
> > MN and so there is no NAT state for the second flow). MN is
> > behind a NAT and so the trigger needs to come from the MN for
> > the second flow.
> 
> I think this is an issue.
> 
> After binding registration, MN should trigger some packet to the HA  
> using the
> DSMIP port in order to create NAT state for non-ESP data flow.
> Otherwise, NAT box may drop the packets tunneled by HA
> because there is no NAT state for the UDP packets (DSMIP port).
>

Implementation wise, I'm not sure ..how this really works
on the HA. When and how does it create the UDP tunnel for
the data packets ? We always create tunnel encap after control,
but, this is after receiving a data packet.



> > Secondly, if the two flows are not tied, how does keepalive
> > messaging work for keeping the NAT states active ? Will there be
> > two NAT keepalive messaging for both the flows ?
> 
> DSMIP uses BU/BA exchange for the keepalive. BU/BA will be sent with  
> the 4500 port.
> We don't have keepalive mechanism for data flow (DSMIP port) in the  
> current spec.
> 

That will be a problem, if we dont have KA for data flows.

Sri


> regards,
> ryuji
> 
> > Also, the two flows needs to be tied for removing the data path
> > upon terminating the MIP session.
> >
> > Thanks
> > Sri
> >
> >
> >
> >
> >> Did I miss the point of your question?
> >>
> >> Regards
> >> George
> >>
> >> On Mon, Apr 7, 2008 at 3:55 PM, Sri Gundavelli
> >> <sgundave@cisco.com> wrote:
> >>> I'm not sure how the NAT traversal scheme works if only
> >>> control traffic is enabled for IPsec protection and
> >>> not the data traffic. 3775 clearly allows this and is
> >>> probably the most default mechanism given the crypto
> >>> hardware accelerator requirements on the boxes. In this
> >>> scenario of MN using a private address and behind a NAT,
> >>> there will be two NAT flows and not sure how they are
> >>> tied.
> >>> This is not an issue in 3775, a secured MIP control
> >>> packets result in a L3 tunnel and its optional if ESP
> >>> is enabled on that tunnel for data traffic. Given the port
> >>> 4500 for ESP only traffic, not sure how non-ESP traffic
> >>> can be sent there. Especially the initial packets from CN
> >>> to MN, when there is no NAT mapping for that flow ...
> >>>
> >>> May be I'm missing some thing basic ... if this is already
> >>> discussed and worked out ...some clarifications or pointers
> >>> to the draft will help ...
> >>>
> >>> Sri
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>> -----Original Message-----
> >>>> From: Pasi.Eronen@nokia.com [mailto:Pasi.Eronen@nokia.com]
> >>>> Sent: Monday, April 07, 2008 3:06 AM
> >>>> To: sgundave@cisco.com
> >>>> Cc: mext@ietf.org
> >>>> Subject: RE: [MEXT] TLV header in DSMIP
> >>>>
> >>>>
> >>>> BTW, I've stated several times that I believe that an average
> >>>> implementor (i.e., someone who hasn't participated in
> >> writing this
> >>>> specification and doesn't have a PhD) can't actually
> >> figure out how
> >>>> the DSMIPv6/IPsec interaction works based on the current spec
> >>>> (which is already in much better shape than earlier versions).
> >>>>
> >>>> I do understand that Hesham as the editor cannot (and should not)
> >>>> fix this alone -- so I would really appreciate if other
> >> WG members
> >>>> would help with writing the needed text.
> >>>>
> >>>> I've suggested e.g. showing packets (both before and after IPsec
> >>>> processing) with their headers to show what traffic is
> >> sent from/to
> >>>> which port (and how IPsec interacts with this). In particular,
> >>>> "using 4500 for secure traffic and DSMIP port for other traffic"
> >>>> is *not* what the current spec says.
> >>>>
> >>>> Could someone from the WG volunteer to produce those
> >> packet diagrams,
> >>>> and propose improved text around those diagrams?
> >>>>
> >>>> (My apologies for being blunt, but I'd rather see this
> >> fixed before
> >>>> the draft comes to IESG -- remember that the ADs who
> >> have to ballot
> >>>> "Yes" or "No objection" mostly haven't participated in
> >> writing this
> >>>> spec, and don't have PhDs.)
> >>>>
> >>>> Best regards,
> >>>> Pasi
> >>>>
> >>>>> -----Original Message-----
> >>>>> From: ext Sri Gundavelli [mailto:sgundave@cisco.com]
> >>>>> Sent: 07 April, 2008 07:12
> >>>>> To: 'Hesham Soliman'
> >>>>> Cc: mext@ietf.org; Eronen Pasi (Nokia-NRC/Helsinki)
> >>>>> Subject: RE: [MEXT] TLV header in DSMIP
> >>>>>
> >>>>> Hi Hesham,
> >>>>>
> >>>>> Also, can you please clarify the operation for this
> >>>>> below scenarioe. We are updating our PMIP6 IPv4 document
> >>>>> and we are not clear how this scenario works, in liu of
> >>>>> the latest DSMIP6 resolutions. Some clarifications will
> >>>>> help.
> >>>>>
> >>>>> When ESP is used only for control traffic and not for data
> >>>>> traffic, how does the NAT traversal scheme work ? The NAT
> >>>>> mappings for both the flows are different, howz the relation
> >>>>> maintained ?
> >>>>>
> >>>>> My Assumption: IPv4 transport in use, NAT in path and
> >>>>> the resolution that the port 4500 is used for secure
> >>>>> ESP traffic and for non secure traffic DSMIP port is
> >>>>> used.
> >>>>>
> >>>>> Operation:
> >>>>> ===========
> >>>>> - MN sends MIP BU encapsulated in UDP to port 4500
> >>>>>
> >>>>> - NAT binding is created on the NAT device, having a
> >>>>>  relation to src port of the BU, port 4500, IPv4-private-coa,
> >>>>>  IPv4-public-coa and HA-V4-Address
> >>>>>
> >>>>> - HA creates a tunnel with UDP encap and with the above
> >>>>>  properties (Src/Dest ports)
> >>>>>
> >>>>> - If MN or HA needs to forward data traffic and unprotected,
> >>>>>  does it needs to be sent to port 4500 or DSMIP port ?
> >>>>>  We cannot send non-ESP traffic to port 4500.
> >>>>>
> >>>>> - If this is sent to DSMIP port, what triggers the new NAT
> >>>>>  mapping and howz the tunnel encap header modified on the HA ?
> >>>>>
> >>>>> - How do keepalives work ?
> >>>>>
> >>>>> Appreciate your time on this.
> >>>>>
> >>>>>
> >>>>> Regards
> >>>>> Sri
> >>>>>
> >>>>>
> >>>>>> -----Original Message-----
> >>>>>> From: Hesham Soliman [mailto:hesham@elevatemobile.com]
> >>>>>> Sent: Saturday, April 05, 2008 1:32 AM
> >>>>>> To: Sri Gundavelli
> >>>>>> Cc: mext@ietf.org; Pasi.Eronen@nokia.com
> >>>>>> Subject: Re: [MEXT] TLV header in DSMIP
> >>>>>>
> >>>>>>>
> >>>>>>> I can provide the text, if there is agreement that
> >> we are using
> >>>>>>> DSMIP port and the TLV-ESP follows the UDP. I'm
> >> bit confused, on
> >>>>>>> what is the port number that is in use. 4500 or
> >> the DSMIP port ?
> >>>>>>
> >>>>>> => I don't think we need the text now, there is agreement
> >>>>>> to remove  this. We're using 4500 for secure traffic and
> >>>> DSMIP port
> >>>>>> for other traffic.
> >>>>>>
> >>>>>> Hesham
> >>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> Sri
> >>>
> >>> _______________________________________________
> >>> MEXT mailing list
> >>> MEXT@ietf.org
> >>> https://www.ietf.org/mailman/listinfo/mext
> >>>
> >
> > _______________________________________________
> > MEXT mailing list
> > MEXT@ietf.org
> > https://www.ietf.org/mailman/listinfo/mext
> 

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From: <Pasi.Eronen@nokia.com>
To: <ryuji.wakikawa@gmail.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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RYUJI WAKIKAWA wrote:

> DSMIP uses BU/BA exchange for the keepalive. BU/BA will be sent with
> the 4500 port.  We don't have keepalive mechanism for data flow
> (DSMIP port) in the current spec.

No, in the current draft BU/BAck is sent over the DSMIPv6 port, 
not 4500. (And yes, the draft is extremely difficult to understand
here, and needs to be much more understandable before it has 
any chance of being approved...)

Best regards,
Pasi
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From: Hesham Soliman <hesham@elevatemobile.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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On 06/04/2008, at 2:16 AM, Sri Gundavelli wrote:

>
>
>> -----Original Message-----
>> From: Hesham Soliman [mailto:hesham@elevatemobile.com]
>> Sent: Saturday, April 05, 2008 1:32 AM
>> To: Sri Gundavelli
>> Cc: mext@ietf.org; Pasi.Eronen@nokia.com
>> Subject: Re: [MEXT] TLV header in DSMIP
>>
>>>
>>> I can provide the text, if there is agreement that we are using
>>> DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
>>> what is the port number that is in use. 4500 or the DSMIP port ?
>>
>> => I don't think we need the text now, there is agreement to remove
>> this.
>> We're using 4500 for secure traffic and DSMIP port for other traffic.
>>
>
>
> Ok. I've no issue using 4500 when using ESP and DSMIP port for non-ESP
> traffic. Offcourse, we could have just used DSMIP port and relied on
> one NAT traversal mechanism ...

=> I guess we didn't think of that!  Please read the discussions on  
IKE and DSMIP. We can't do what you're suggesting and the best way to  
find out why is to read those threads, look for pasi's emails on the  
list, it doesn't cover the private discussions but it shows why we  
need both.

Hesham


>
>
> Sri
>
>
>> Hesham
>>
>>>
>>>
>>> Sri
>>>
>>>
>>
>

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Subject: Re: [MEXT] TLV header in DSMIP
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>> > > I can provide the text, if there is agreement that we are using
>> > > DSMIP port and the TLV-ESP follows the UDP. I'm bit confused, on
>> > > what is the port number that is in use. 4500 or the DSMIP port ?
>> > 
>> > => I don't think we need the text now, there is agreement to remove
>> > this.
>> > We're using 4500 for secure traffic and DSMIP port for other traffic.
>> > 
>> 
>> 
>> Ok. I've no issue using 4500 when using ESP and DSMIP port for non-ESP
>> traffic. Offcourse, we could have just used DSMIP port and relied on
>> one NAT traversal mechanism ...
>
> => I guess we didn't think of that!  Please read the discussions on IKE and 
> => DSMIP. We can't do what you're suggesting and the best way to find out why 
> => is to read those threads, look for pasi's emails on the list, it doesn't 
> => cover the private discussions but it shows why we need both.
>

Yes, I did not follow the threads. But, I do realize lot of time and
discussions went into this and that its a very complex problem. But,
right now I'm only trying to understand how this works. My issue with
the two ports is from the HA perspective. How it can identify the first
data packet from the MN and setup the UDP tunnel in that path. How it
ties this keepalive packet to a recently accepted BU. All this logic
from the MN perspective appears very simple, but the logic on the HA
is complex and I'm trying to understand the flow.


Sri









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Subject: Re: [MEXT] TLV header in DSMIP
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>
> Yes, I did not follow the threads. But, I do realize lot of time and
> discussions went into this and that its a very complex problem. But,
> right now I'm only trying to understand how this works. My issue with
> the two ports is from the HA perspective. How it can identify the  
> first
> data packet from the MN and setup the UDP tunnel in that path. How it
> ties this keepalive packet to a recently accepted BU.

=> What keepalive packet? We're using the BU/BA exchange for  
keepalive. IKE has its own KA mechanisms.
I'm not sure what you mean.

I know the current security considerations section is not easy to  
understand and we're working on making it much clearer, but the "DSMIP"
part of the spec is very clear I think. So read everything else in the  
spec and read the security section sometime next week when I send out  
the new
version. In the meantime read the spec from:
http://www.elevatemobile.com/ietf/draft-ietf-mext-nemo-v4traversal-02.txt

There are two bugs, the Type field in the TLV is 4 bits not 8 and the  
values for the type will only contain GRE.

Hesham


> All this logic
> from the MN perspective appears very simple, but the logic on the HA
> is complex and I'm trying to understand the flow.
>
>
> Sri
>
>
>
>
>
>
>
>
>

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Cc: Pasi.Eronen@nokia.com, mext@ietf.org
Subject: Re: [MEXT] TLV header in DSMIP
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On Wed, 9 Apr 2008, Hesham Soliman wrote:

>> 
>> Yes, I did not follow the threads. But, I do realize lot of time and
>> discussions went into this and that its a very complex problem. But,
>> right now I'm only trying to understand how this works. My issue with
>> the two ports is from the HA perspective. How it can identify the first
>> data packet from the MN and setup the UDP tunnel in that path. How it
>> ties this keepalive packet to a recently accepted BU.
>
> =>  What keepalive packet? We're using the BU/BA exchange for keepalive. IKE 
> =>  has its own KA mechanisms.
> I'm not sure what you mean.
>

But, your BU/BA is a UDP encapsulated ESP packet and thats going to
4500 not DSMIP port ? (I did see a mail just now from Pasi clarifying
this part). I'm not clear on two NAT flows, what packets are triggering
the flows towards port 4500 and what is triggering flows towards DSMIP
port.

I will read the spec again and may be that should clear it.

Thanks
Sri


> I know the current security considerations section is not easy to understand 
> and we're working on making it much clearer, but the "DSMIP"
> part of the spec is very clear I think. So read everything else in the spec 
> and read the security section sometime next week when I send out the new
> version. In the meantime read the spec from:
> http://www.elevatemobile.com/ietf/draft-ietf-mext-nemo-v4traversal-02.txt
>
> There are two bugs, the Type field in the TLV is 4 bits not 8 and the values 
> for the type will only contain GRE.
>
> Hesham
>
>
>> All this logic
>> from the MN perspective appears very simple, but the logic on the HA
>> is complex and I'm trying to understand the flow.
>> 
>> 
>> Sri
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>
>
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From: Hesham Soliman <hesham@elevatemobile.com>
To: Sri Gundavelli <sgundave@cisco.com>
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Subject: Re: [MEXT] TLV header in DSMIP
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On 09/04/2008, at 12:50 AM, Sri Gundavelli wrote:

>
>
> On Wed, 9 Apr 2008, Hesham Soliman wrote:
>
>>> Yes, I did not follow the threads. But, I do realize lot of time and
>>> discussions went into this and that its a very complex problem. But,
>>> right now I'm only trying to understand how this works. My issue  
>>> with
>>> the two ports is from the HA perspective. How it can identify the  
>>> first
>>> data packet from the MN and setup the UDP tunnel in that path. How  
>>> it
>>> ties this keepalive packet to a recently accepted BU.
>>
>> =>  What keepalive packet? We're using the BU/BA exchange for  
>> keepalive. IKE =>  has its own KA mechanisms.
>> I'm not sure what you mean.
>>
>
> But, your BU/BA is a UDP encapsulated ESP packet and thats going to
> 4500 not DSMIP port ? (I did see a mail just now from Pasi clarifying
> this part).

=> ok so you know this is not correct.

> I'm not clear on two NAT flows, what packets are triggering
> the flows towards port 4500 and what is triggering flows towards DSMIP
> port.
>
> I will read the spec again and may be that should clear it.
>
=> ok. Let me know if you have more comments.

Hesham
> Thanks
> Sri
>
>
>> I know the current security considerations section is not easy to  
>> understand and we're working on making it much clearer, but the  
>> "DSMIP"
>> part of the spec is very clear I think. So read everything else in  
>> the spec and read the security section sometime next week when I  
>> send out the new
>> version. In the meantime read the spec from:
>> http://www.elevatemobile.com/ietf/draft-ietf-mext-nemo-v4traversal-02.txt
>>
>> There are two bugs, the Type field in the TLV is 4 bits not 8 and  
>> the values for the type will only contain GRE.
>>
>> Hesham
>>
>>
>>> All this logic
>>> from the MN perspective appears very simple, but the logic on the HA
>>> is complex and I'm trying to understand the flow.
>>> Sri
>>
>>

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From: RYUJI WAKIKAWA <ryuji.wakikawa@gmail.com>
To: <Pasi.Eronen@nokia.com> <Pasi.Eronen@nokia.com>
In-Reply-To: <1696498986EFEC4D9153717DA325CB724DC948@vaebe104.NOE.Nokia.com>
References: <FC91340F-574D-432B-9C16-FDC4522FA897@elevatemobile.com><005901c895d3$c4d52440$d2716b80@amer.cisco.com><EA3F921C-5B65-4895-9F4E-481EE6F7CCDE@elevatemobile.com><001e01c89604$15134880$d4f6200a@amer.cisco.com><05465585-698D-4926-8D2C-FFDD869BEB86@elevatemobile.com><000001c896ec$f8e64d30$d4f6200a@amer.cisco.com><AA0726F0-0A81-45B1-B640-261D3C2505A7@elevatemobile.com><003a01c89865$980851a0$7f89680a@amer.cisco.com><1696498986EFEC4D9153717DA325CB724DBD62@vaebe104.NOE.Nokia.com><002d01c898bf$78844910$d4f6200a@amer.cisco.com><d3886a520804070857j2a611ad6n793275252b28a47f@mail.gmail.com><003401c898c9$fd297460$d4f6200a@amer.cisco.com>
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Pasi,

Thanks for your correction.
I will wait for the packet diagrams in the next revision:-)

ryuji

On 2008/04/08, at 19:47, <Pasi.Eronen@nokia.com>  
<Pasi.Eronen@nokia.com> wrote:
> RYUJI WAKIKAWA wrote:
>
>> DSMIP uses BU/BA exchange for the keepalive. BU/BA will be sent with
>> the 4500 port.  We don't have keepalive mechanism for data flow
>> (DSMIP port) in the current spec.
>
> No, in the current draft BU/BAck is sent over the DSMIPv6 port,
> not 4500. (And yes, the draft is extremely difficult to understand
> here, and needs to be much more understandable before it has
> any chance of being approved...)
>
> Best regards,
> Pasi

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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
To: Tony Whyman <tony.whyman@mccallumwhyman.com>
In-Reply-To: <47F60F77.7000809@mccallumwhyman.com>
References: <47F60F77.7000809@mccallumwhyman.com>
Organization: Universidad Carlos III de Madrid
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Subject: Re: [MEXT] A Proposed Solution for Aeronautical RO
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Hi Tony,

	Thanks for proposing a solution.

	While I admit I've not gone through all your paper yet, I'd like to ask
you a question: does your solution require changes on the CN side? from
what I've read so far, I tend to think so, but I'd like to check that. I
understood in the last MEXT interim meeting that changing the CNs was
not a valid assumption.

	Thanks a lot,

	Carlos

On vie, 2008-04-04 at 12:22 +0100, Tony Whyman wrote:
> Dear all,
>=20
> I have prepared a proposed IPsec based RO scheme that is intended to=20
> meet the requirements contained in draft-ietf-mext-aero-reqs-01. The=20
> paper can be downloaded from:
>=20
> http://www.mccallumwhyman.com/papers/Proposal%20for%20Aeronautical%20RO.p=
df
>=20
> It's a large paper (15,000+ words) but that is because of the large=20
> Appendix A, which is an analysis of how the proposal meets the current=20
> aeronautical use cases. Appendix B also provides a compliancy check=20
> against draft-ietf-mext-aero-reqs-01.
>=20
> The main body of the paper is likely to be of most interest to this=20
> group. In this, I have tried to evolve the IPsec RO approach proposed in=20
> draft-ietf-mip6-cn-ipsec-07 into a common framework with the=20
> recommendations of Eurocontrol 2006  IP Study. This study was intended=20
> to "assess the feasibility of using IP to support the next generation of=20
> collaborative ATS applications, in the 2020+ timeframe". The published=20
> results of that study can be downloaded from the ICAO website (URL in=20
> the references list of my paper).
>=20
> Although the focus of the paper is on meeting the requirements for=20
> Aeronautical use, I do not believe that the requirements are unique to=20
> civil aviation. The UK Railways Safety and Standards Board (RSSB) is=20
> also about to publish a Guidance Note (Ref: GE/GN8579) which is intended=20
> to co-ordinate the use of IP Networking for mobile networking to trains.=20
> SATCOM, GPRS, WiFi and WiMAX networks are already being used to support=20
> passenger "on train" internet access and some operational use, and this=20
> Guidance Note is intended to co-ordinate the use of IP for operational=20
> comms, leading into Safety Related applications. It was the result of=20
> industry consultation and workshops and resulted in a very similar set=20
> of operational scenarios to those seen in ATC, and a similar proposal=20
> for IPsec based mobile communications.
>=20
> My own conclusion from all this, is that there is a real need for an=20
> IPsec based Mobility Framework to meet the needs of Operational=20
> Communications in (at least) Transport Infrastructure applications.
>=20
> My paper has made some specific criticisms of=20
> draft-ietf-mip6-cn-ipsec-07, where I do not believe it meets the needs=20
> of aeronautical communications. However, the underlying criticism is=20
> that draft-ietf-mip6-cn-ipsec-07 is relatively neutral as regards IKEv1=20
> and IKEv2. My view is that IKEv2 is not just a better protocol, but with=20
> improved Traffic Selection signalling and the MOBIKE (RFC 4555), it is=20
> the only flavour of IPsec IKE that should be considered for an IPsec=20
> based mobility framework.
>=20
> Starting with the assumption that IKEv2/MOBIKE is used, I believe that=20
> it is possible to demonstrate a much improved strategy for IPsec based=20
> Route Optimisation, that starts with the use of the Home Address as the=20
> MN SA end-point and then moves it to the care-of address. Thus=20
> demonstrating both authorisation to use the Home Address and Return=20
> Routability to both addresses before any user data is exchanged.=20
> Interestingly, if user data is to be protected by ESP or AH tunnelling=20
> then there seems to be no need to exchange a Binding Update, as Child=20
> SAs with appropriate Traffic Selectors seem to be sufficient.
>=20
> A further step is also possible if both MN and CN support a common PKI=20
> that provides both authentication and authorisation of the MN to use its=20
> Home Address. In this case, it appears possible for the MN to start the=20
> IPsec based RO procedure direct from its care-of address without there=20
> needing to be any Home Agent involvement. This is particularly=20
> interesting to aeronautical use, where communication is generally=20
> aircraft initiated, as it avoids both availability and regulatory issues=20
> with Home Agents, and fits with the recommendations of the Eurocontrol=20
> IP Study. Although it did not call it as such, this study essentially=20
> proposed an IPsec based RO scheme, which it called "tunnel movement" and=20
> assumed a PKI that authenticated aircraft and their use of their static=20
> IP Addresses.
>=20
> The study limited itself to what was possible with published RFCs, and=20
> thus all air/ground communications had to be ESP tunnelled, due to the=20
> use of IKEv2/MOBIKE to manage the communications paths. Two specific=20
> criticisms arise from this. One is that there are many cases where an=20
> RFC 3775 Home Address Option/Type 2 Routing Header and Transport mode=20
> ESP would be more efficient than ESP tunnelling, and the other is that=20
> it forces all air/ground communications to be protected, even when the=20
> overhead of doing so is not otherwise justifiable.
>=20
> In my paper, I have tried to resolve both criticisms.
>=20
> I have resolved the first, by proposing a new IPsec SA mode that=20
> essentially combines ESP/AH transport mode with use of the RFC 3775 Home=20
> Address Option/Type 2 Routing Header.
>=20
> I have resolved the second by proposing the notion of "No Protection"=20
> SAs - i.e. using the IKEv2 to negotiate IP-in-IP tunnels, or use of the=20
> RFC 3775 Home Address Option/Type 2 Routing Header. Although this seems=20
> to be counter-intuitive for the IPsec IKE to negotiate off security, the=20
> benefit is in having a single mechanism to manage unprotected mobile=20
> communications, when there is also a need for secure mobile communication=
s.
>=20
> My paper also examines the case where the IKE is used to manage secure=20
> mobile communications but has no means of authenticating the MN to the=20
> CN. This appears to be interesting as part of a wider framework, but is=20
> not of direct interest to aeronautical communications.
>=20
> I have also investigated possible implications for MN to HA=20
> communications, and proposed IKEv2/MOBIKE scenarios where Binding=20
> Updates are no longer needed here. Again, this is not of direct interest=20
> to aeronautical communications, but should be of wider interest.
>=20
> Looking back on the paper, although I started writing assuming IPv6=20
> only, almost everything proposed is also relevant to IPv4. Only the use=20
> of the RFC 3775 Home Address Option/Type 2 Routing Header is IPv6 specifi=
c.
>=20
> Using the IKE to manage mobility also seems to have some other=20
> interesting implications. Like it or not, NAT Gateways are well=20
> supported by IPsec, and a Mobile Node that uses  IKEv2/MOBIKE to manage=20
> both its HA binding and RO, seems to be able to move behind NAT Gateways=20
> and then re-emerge without any obvious problems - although this mode of=20
> operation is limited to ESP tunnels.
>=20
> Basic NEMO operations should really be just a case of an appropriate set=20
> of SA Traffic Selectors for MN to SA tunnels. If a PKI exists that=20
> allows a CN to authenticate a Mobile Router and authorise the routes it=20
> offers, then the use of the IKE to manage Mobile Router Route=20
> Optimisation also appears to be an interesting approach. This is very=20
> relevant to Aeronautical use.
>=20
> IKEv2/MOBIKE has limited multi-homing capability, in respect of=20
> supporting the use of multi-homing for increasing availability. Load=20
> sharing is not part of the current framework. The use of multi-homing=20
> for increasing availability meets a perceived aeronautical requirement=20
> to enable high availability of air/ground communications through agility=20
> in the use of alternative networks. Extension to load sharing seems to a=20
> suitable topic for future work, but not essential for aeronautical use.
>=20
> The purpose of this paper is to develop an IPsec based RO strategy=20
> suitable for aeronautical use and one that is also suitable for similar=20
> transport infrastructure uses, but I believe the use of IPsec based=20
> mobility management using IKEv2 and MOBIKE should be of general interest.
>=20
> Regards
>=20
> Tony Whyman
>=20
>=20
>=20
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
--=20
Carlos Jes=FAs Bernardos Cano     http://www.netcoms.net
GPG FP: D29B 0A6A 639A A561 93CA  4D55 35DC BA4D D170 4F67

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_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext

--===============2085167293==--



From mext-bounces@ietf.org  Thu Apr 10 15:35:54 2008
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Cc: mext@ietf.org
Subject: Re: [MEXT] A Proposed Solution for Aeronautical RO
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Carlos Jes=FAs Bernardos Cano escribi=F3:
> Hi Tony,
>
> 	Thanks for proposing a solution.
>
> 	While I admit I've not gone through all your paper yet, I'd like to ask
> you a question: does your solution require changes on the CN side? from
> what I've read so far, I tend to think so, but I'd like to check that. I
> understood in the last MEXT interim meeting that changing the CNs was
> not a valid assumption.
>   =

right
but rephrasing Carlos question, would the solution support CN proxies =

that perform the RO operations on behalf of the CN? (that would be =

acceptable according to the requirements)

Regards, marcelo


> 	Thanks a lot,
>
> 	Carlos
>
> On vie, 2008-04-04 at 12:22 +0100, Tony Whyman wrote:
>   =

>> Dear all,
>>
>> I have prepared a proposed IPsec based RO scheme that is intended to =

>> meet the requirements contained in draft-ietf-mext-aero-reqs-01. The =

>> paper can be downloaded from:
>>
>> http://www.mccallumwhyman.com/papers/Proposal%20for%20Aeronautical%20RO.=
pdf
>>
>> It's a large paper (15,000+ words) but that is because of the large =

>> Appendix A, which is an analysis of how the proposal meets the current =

>> aeronautical use cases. Appendix B also provides a compliancy check =

>> against draft-ietf-mext-aero-reqs-01.
>>
>> The main body of the paper is likely to be of most interest to this =

>> group. In this, I have tried to evolve the IPsec RO approach proposed in =

>> draft-ietf-mip6-cn-ipsec-07 into a common framework with the =

>> recommendations of Eurocontrol 2006  IP Study. This study was intended =

>> to "assess the feasibility of using IP to support the next generation of =

>> collaborative ATS applications, in the 2020+ timeframe". The published =

>> results of that study can be downloaded from the ICAO website (URL in =

>> the references list of my paper).
>>
>> Although the focus of the paper is on meeting the requirements for =

>> Aeronautical use, I do not believe that the requirements are unique to =

>> civil aviation. The UK Railways Safety and Standards Board (RSSB) is =

>> also about to publish a Guidance Note (Ref: GE/GN8579) which is intended =

>> to co-ordinate the use of IP Networking for mobile networking to trains. =

>> SATCOM, GPRS, WiFi and WiMAX networks are already being used to support =

>> passenger "on train" internet access and some operational use, and this =

>> Guidance Note is intended to co-ordinate the use of IP for operational =

>> comms, leading into Safety Related applications. It was the result of =

>> industry consultation and workshops and resulted in a very similar set =

>> of operational scenarios to those seen in ATC, and a similar proposal =

>> for IPsec based mobile communications.
>>
>> My own conclusion from all this, is that there is a real need for an =

>> IPsec based Mobility Framework to meet the needs of Operational =

>> Communications in (at least) Transport Infrastructure applications.
>>
>> My paper has made some specific criticisms of =

>> draft-ietf-mip6-cn-ipsec-07, where I do not believe it meets the needs =

>> of aeronautical communications. However, the underlying criticism is =

>> that draft-ietf-mip6-cn-ipsec-07 is relatively neutral as regards IKEv1 =

>> and IKEv2. My view is that IKEv2 is not just a better protocol, but with =

>> improved Traffic Selection signalling and the MOBIKE (RFC 4555), it is =

>> the only flavour of IPsec IKE that should be considered for an IPsec =

>> based mobility framework.
>>
>> Starting with the assumption that IKEv2/MOBIKE is used, I believe that =

>> it is possible to demonstrate a much improved strategy for IPsec based =

>> Route Optimisation, that starts with the use of the Home Address as the =

>> MN SA end-point and then moves it to the care-of address. Thus =

>> demonstrating both authorisation to use the Home Address and Return =

>> Routability to both addresses before any user data is exchanged. =

>> Interestingly, if user data is to be protected by ESP or AH tunnelling =

>> then there seems to be no need to exchange a Binding Update, as Child =

>> SAs with appropriate Traffic Selectors seem to be sufficient.
>>
>> A further step is also possible if both MN and CN support a common PKI =

>> that provides both authentication and authorisation of the MN to use its =

>> Home Address. In this case, it appears possible for the MN to start the =

>> IPsec based RO procedure direct from its care-of address without there =

>> needing to be any Home Agent involvement. This is particularly =

>> interesting to aeronautical use, where communication is generally =

>> aircraft initiated, as it avoids both availability and regulatory issues =

>> with Home Agents, and fits with the recommendations of the Eurocontrol =

>> IP Study. Although it did not call it as such, this study essentially =

>> proposed an IPsec based RO scheme, which it called "tunnel movement" and =

>> assumed a PKI that authenticated aircraft and their use of their static =

>> IP Addresses.
>>
>> The study limited itself to what was possible with published RFCs, and =

>> thus all air/ground communications had to be ESP tunnelled, due to the =

>> use of IKEv2/MOBIKE to manage the communications paths. Two specific =

>> criticisms arise from this. One is that there are many cases where an =

>> RFC 3775 Home Address Option/Type 2 Routing Header and Transport mode =

>> ESP would be more efficient than ESP tunnelling, and the other is that =

>> it forces all air/ground communications to be protected, even when the =

>> overhead of doing so is not otherwise justifiable.
>>
>> In my paper, I have tried to resolve both criticisms.
>>
>> I have resolved the first, by proposing a new IPsec SA mode that =

>> essentially combines ESP/AH transport mode with use of the RFC 3775 Home =

>> Address Option/Type 2 Routing Header.
>>
>> I have resolved the second by proposing the notion of "No Protection" =

>> SAs - i.e. using the IKEv2 to negotiate IP-in-IP tunnels, or use of the =

>> RFC 3775 Home Address Option/Type 2 Routing Header. Although this seems =

>> to be counter-intuitive for the IPsec IKE to negotiate off security, the =

>> benefit is in having a single mechanism to manage unprotected mobile =

>> communications, when there is also a need for secure mobile communicatio=
ns.
>>
>> My paper also examines the case where the IKE is used to manage secure =

>> mobile communications but has no means of authenticating the MN to the =

>> CN. This appears to be interesting as part of a wider framework, but is =

>> not of direct interest to aeronautical communications.
>>
>> I have also investigated possible implications for MN to HA =

>> communications, and proposed IKEv2/MOBIKE scenarios where Binding =

>> Updates are no longer needed here. Again, this is not of direct interest =

>> to aeronautical communications, but should be of wider interest.
>>
>> Looking back on the paper, although I started writing assuming IPv6 =

>> only, almost everything proposed is also relevant to IPv4. Only the use =

>> of the RFC 3775 Home Address Option/Type 2 Routing Header is IPv6 specif=
ic.
>>
>> Using the IKE to manage mobility also seems to have some other =

>> interesting implications. Like it or not, NAT Gateways are well =

>> supported by IPsec, and a Mobile Node that uses  IKEv2/MOBIKE to manage =

>> both its HA binding and RO, seems to be able to move behind NAT Gateways =

>> and then re-emerge without any obvious problems - although this mode of =

>> operation is limited to ESP tunnels.
>>
>> Basic NEMO operations should really be just a case of an appropriate set =

>> of SA Traffic Selectors for MN to SA tunnels. If a PKI exists that =

>> allows a CN to authenticate a Mobile Router and authorise the routes it =

>> offers, then the use of the IKE to manage Mobile Router Route =

>> Optimisation also appears to be an interesting approach. This is very =

>> relevant to Aeronautical use.
>>
>> IKEv2/MOBIKE has limited multi-homing capability, in respect of =

>> supporting the use of multi-homing for increasing availability. Load =

>> sharing is not part of the current framework. The use of multi-homing =

>> for increasing availability meets a perceived aeronautical requirement =

>> to enable high availability of air/ground communications through agility =

>> in the use of alternative networks. Extension to load sharing seems to a =

>> suitable topic for future work, but not essential for aeronautical use.
>>
>> The purpose of this paper is to develop an IPsec based RO strategy =

>> suitable for aeronautical use and one that is also suitable for similar =

>> transport infrastructure uses, but I believe the use of IPsec based =

>> mobility management using IKEv2 and MOBIKE should be of general interest.
>>
>> Regards
>>
>> Tony Whyman
>>
>>
>>
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>>     =

>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>>     =



_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


From mext-bounces@ietf.org  Fri Apr 11 02:34:00 2008
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Date: Fri, 11 Apr 2008 10:34:12 +0100
From: Tony Whyman <tony.whyman@mccallumwhyman.com>
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Subject: Re: [MEXT] A Proposed Solution for Aeronautical RO
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Marcelo and Carlos,

Thank you for taking the time to look at my paper. However, I am =

slightly confused by your question, in the sense of what does "change" mean.

In my proposed scheme, the CN is required to support IKEv2/MOBIKE as a =

minimum. I have also proposed extensions to IKEv2 to include a means of =

negotiating the use of the use of the Home Address Option/Type 2 Routing =

Header and this extension is obviously a "change" from published RFCs - =

although not necessarily an essential change - it is proposed to improve =

performance.

So, if the question is "is the functionality of the CN different from =

that required by RFC 3775", the answer is "of course it is". My proposal =

observes that trying to keep within the confines of RFC 3775 when =

introducing IPsec to the MN to CN relationship leads to an inefficient =

protocol and I have hence proposed to improve it.

Is change a problem? Not in the context of the proposal. Air Traffic =

Control is a controlled environment where all systems have to be =

compliant and certified or approved before operation. The industry is =

only at the start of a development process for an ATN-IP and there is =

still plenty of scope for refining the specification before freezing it.

How big a change is being proposed? Conceptually, it is probably a big =

one. The MN to CN relationship changes from being an optimisation to the =

normal mobility relationship. Home Agents are only brought into the =

picture when you need a transition aid to support communication with CNs =

that don't support IKEv2/MOBIKE and/or do not recognise the MN's =

credentials, or when the DNS is used for (mobile) name to address =

resolution and hence you need a rendezvous point.

In the civil aviation environment  for ATC and AOC it may be assumed =

that all CNs will be compliant and part of the same trust framework. The =

(existing) Context Management application manages the very dynamic =

relationship between the "Flight", an "aircraft" and any IP Addresses =

assigned to it, and avoids the need for rendezvous points. Home Agents =

are not needed for such reasons, and are anyway undesirable because of =

the availability and regulatory issues I referred to. Hence a proposal =

that focusses on the MN to CN relationship.

Regards

Tony Whyman

marcelo bagnulo wrote:
> Carlos Jes=FAs Bernardos Cano escribi=F3:
>> Hi Tony,
>>
>>     Thanks for proposing a solution.
>>
>>     While I admit I've not gone through all your paper yet, I'd like =

>> to ask
>> you a question: does your solution require changes on the CN side? from
>> what I've read so far, I tend to think so, but I'd like to check that. I
>> understood in the last MEXT interim meeting that changing the CNs was
>> not a valid assumption.
>>   =

> right
> but rephrasing Carlos question, would the solution support CN proxies =

> that perform the RO operations on behalf of the CN? (that would be =

> acceptable according to the requirements)
>
> Regards, marcelo
>
>
>>     Thanks a lot,
>>
>>     Carlos
>>
>> On vie, 2008-04-04 at 12:22 +0100, Tony Whyman wrote:
>>  =

>>> Dear all,
>>>
>>> I have prepared a proposed IPsec based RO scheme that is intended to =

>>> meet the requirements contained in draft-ietf-mext-aero-reqs-01. The =

>>> paper can be downloaded from:
>>>
>>> http://www.mccallumwhyman.com/papers/Proposal%20for%20Aeronautical%20RO=
.pdf =

>>>
>>>
>>> It's a large paper (15,000+ words) but that is because of the large =

>>> Appendix A, which is an analysis of how the proposal meets the =

>>> current aeronautical use cases. Appendix B also provides a =

>>> compliancy check against draft-ietf-mext-aero-reqs-01.
>>>
>>> The main body of the paper is likely to be of most interest to this =

>>> group. In this, I have tried to evolve the IPsec RO approach =

>>> proposed in draft-ietf-mip6-cn-ipsec-07 into a common framework with =

>>> the recommendations of Eurocontrol 2006  IP Study. This study was =

>>> intended to "assess the feasibility of using IP to support the next =

>>> generation of collaborative ATS applications, in the 2020+ =

>>> timeframe". The published results of that study can be downloaded =

>>> from the ICAO website (URL in the references list of my paper).
>>>
>>> Although the focus of the paper is on meeting the requirements for =

>>> Aeronautical use, I do not believe that the requirements are unique =

>>> to civil aviation. The UK Railways Safety and Standards Board (RSSB) =

>>> is also about to publish a Guidance Note (Ref: GE/GN8579) which is =

>>> intended to co-ordinate the use of IP Networking for mobile =

>>> networking to trains. SATCOM, GPRS, WiFi and WiMAX networks are =

>>> already being used to support passenger "on train" internet access =

>>> and some operational use, and this Guidance Note is intended to =

>>> co-ordinate the use of IP for operational comms, leading into Safety =

>>> Related applications. It was the result of industry consultation and =

>>> workshops and resulted in a very similar set of operational =

>>> scenarios to those seen in ATC, and a similar proposal for IPsec =

>>> based mobile communications.
>>>
>>> My own conclusion from all this, is that there is a real need for an =

>>> IPsec based Mobility Framework to meet the needs of Operational =

>>> Communications in (at least) Transport Infrastructure applications.
>>>
>>> My paper has made some specific criticisms of =

>>> draft-ietf-mip6-cn-ipsec-07, where I do not believe it meets the =

>>> needs of aeronautical communications. However, the underlying =

>>> criticism is that draft-ietf-mip6-cn-ipsec-07 is relatively neutral =

>>> as regards IKEv1 and IKEv2. My view is that IKEv2 is not just a =

>>> better protocol, but with improved Traffic Selection signalling and =

>>> the MOBIKE (RFC 4555), it is the only flavour of IPsec IKE that =

>>> should be considered for an IPsec based mobility framework.
>>>
>>> Starting with the assumption that IKEv2/MOBIKE is used, I believe =

>>> that it is possible to demonstrate a much improved strategy for =

>>> IPsec based Route Optimisation, that starts with the use of the Home =

>>> Address as the MN SA end-point and then moves it to the care-of =

>>> address. Thus demonstrating both authorisation to use the Home =

>>> Address and Return Routability to both addresses before any user =

>>> data is exchanged. Interestingly, if user data is to be protected by =

>>> ESP or AH tunnelling then there seems to be no need to exchange a =

>>> Binding Update, as Child SAs with appropriate Traffic Selectors seem =

>>> to be sufficient.
>>>
>>> A further step is also possible if both MN and CN support a common =

>>> PKI that provides both authentication and authorisation of the MN to =

>>> use its Home Address. In this case, it appears possible for the MN =

>>> to start the IPsec based RO procedure direct from its care-of =

>>> address without there needing to be any Home Agent involvement. This =

>>> is particularly interesting to aeronautical use, where communication =

>>> is generally aircraft initiated, as it avoids both availability and =

>>> regulatory issues with Home Agents, and fits with the =

>>> recommendations of the Eurocontrol IP Study. Although it did not =

>>> call it as such, this study essentially proposed an IPsec based RO =

>>> scheme, which it called "tunnel movement" and assumed a PKI that =

>>> authenticated aircraft and their use of their static IP Addresses.
>>>
>>> The study limited itself to what was possible with published RFCs, =

>>> and thus all air/ground communications had to be ESP tunnelled, due =

>>> to the use of IKEv2/MOBIKE to manage the communications paths. Two =

>>> specific criticisms arise from this. One is that there are many =

>>> cases where an RFC 3775 Home Address Option/Type 2 Routing Header =

>>> and Transport mode ESP would be more efficient than ESP tunnelling, =

>>> and the other is that it forces all air/ground communications to be =

>>> protected, even when the overhead of doing so is not otherwise =

>>> justifiable.
>>>
>>> In my paper, I have tried to resolve both criticisms.
>>>
>>> I have resolved the first, by proposing a new IPsec SA mode that =

>>> essentially combines ESP/AH transport mode with use of the RFC 3775 =

>>> Home Address Option/Type 2 Routing Header.
>>>
>>> I have resolved the second by proposing the notion of "No =

>>> Protection" SAs - i.e. using the IKEv2 to negotiate IP-in-IP =

>>> tunnels, or use of the RFC 3775 Home Address Option/Type 2 Routing =

>>> Header. Although this seems to be counter-intuitive for the IPsec =

>>> IKE to negotiate off security, the benefit is in having a single =

>>> mechanism to manage unprotected mobile communications, when there is =

>>> also a need for secure mobile communications.
>>>
>>> My paper also examines the case where the IKE is used to manage =

>>> secure mobile communications but has no means of authenticating the =

>>> MN to the CN. This appears to be interesting as part of a wider =

>>> framework, but is not of direct interest to aeronautical =

>>> communications.
>>>
>>> I have also investigated possible implications for MN to HA =

>>> communications, and proposed IKEv2/MOBIKE scenarios where Binding =

>>> Updates are no longer needed here. Again, this is not of direct =

>>> interest to aeronautical communications, but should be of wider =

>>> interest.
>>>
>>> Looking back on the paper, although I started writing assuming IPv6 =

>>> only, almost everything proposed is also relevant to IPv4. Only the =

>>> use of the RFC 3775 Home Address Option/Type 2 Routing Header is =

>>> IPv6 specific.
>>>
>>> Using the IKE to manage mobility also seems to have some other =

>>> interesting implications. Like it or not, NAT Gateways are well =

>>> supported by IPsec, and a Mobile Node that uses  IKEv2/MOBIKE to =

>>> manage both its HA binding and RO, seems to be able to move behind =

>>> NAT Gateways and then re-emerge without any obvious problems - =

>>> although this mode of operation is limited to ESP tunnels.
>>>
>>> Basic NEMO operations should really be just a case of an appropriate =

>>> set of SA Traffic Selectors for MN to SA tunnels. If a PKI exists =

>>> that allows a CN to authenticate a Mobile Router and authorise the =

>>> routes it offers, then the use of the IKE to manage Mobile Router =

>>> Route Optimisation also appears to be an interesting approach. This =

>>> is very relevant to Aeronautical use.
>>>
>>> IKEv2/MOBIKE has limited multi-homing capability, in respect of =

>>> supporting the use of multi-homing for increasing availability. Load =

>>> sharing is not part of the current framework. The use of =

>>> multi-homing for increasing availability meets a perceived =

>>> aeronautical requirement to enable high availability of air/ground =

>>> communications through agility in the use of alternative networks. =

>>> Extension to load sharing seems to a suitable topic for future work, =

>>> but not essential for aeronautical use.
>>>
>>> The purpose of this paper is to develop an IPsec based RO strategy =

>>> suitable for aeronautical use and one that is also suitable for =

>>> similar transport infrastructure uses, but I believe the use of =

>>> IPsec based mobility management using IKEv2 and MOBIKE should be of =

>>> general interest.
>>>
>>> Regards
>>>
>>> Tony Whyman
>>>
>>>
>>>
>>> _______________________________________________
>>> MEXT mailing list
>>> MEXT@ietf.org
>>> https://www.ietf.org/mailman/listinfo/mext
>>>     =

>>> -----------------------------------------------------------------------=
- =

>>>
>>>
>>> _______________________________________________
>>> MEXT mailing list
>>> MEXT@ietf.org
>>> https://www.ietf.org/mailman/listinfo/mext
>>>     =

>
>
_______________________________________________
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Date: Fri, 11 Apr 2008 12:29:27 +0200
From: "=?ISO-8859-1?Q?Carlos_Jes=FAs_Bernardos_Cano?=" <cjbc@it.uc3m.es>
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Subject: Re: [MEXT] A Proposed Solution for Aeronautical RO
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Hi Tony,

  Thanks for your reply. Please, see my comments below.

On 11/04/2008, Tony Whyman <tony.whyman@mccallumwhyman.com> wrote:
> Marcelo and Carlos,
>
>  Thank you for taking the time to look at my paper. However, I am slightly
> confused by your question, in the sense of what does "change" mean.

  I mean requiring some new extension/mechanism that is not supported
by standard IPv6 nodes.

>
>  In my proposed scheme, the CN is required to support IKEv2/MOBIKE as a
> minimum. I have also proposed extensions to IKEv2 to include a means of
> negotiating the use of the use of the Home Address Option/Type 2 Routing
> Header and this extension is obviously a "change" from published RFCs -
> although not necessarily an essential change - it is proposed to improve
> performance.
>
>  So, if the question is "is the functionality of the CN different from th=
at
> required by RFC 3775", the answer is "of course it is". My proposal obser=
ves
> that trying to keep within the confines of RFC 3775 when introducing IPsec
> to the MN to CN relationship leads to an inefficient protocol and I have
> hence proposed to improve it.
>

I was not saying I disagree with that :-).

>  Is change a problem? Not in the context of the proposal. Air Traffic
> Control is a controlled environment where all systems have to be compliant
> and certified or approved before operation. The industry is only at the
> start of a development process for an ATN-IP and there is still plenty of
> scope for refining the specification before freezing it.

  Well, that's different from what I understood in the MEXT itnerim
meeting. Maybe I'm wrong, but I think the question regarding modifying
the operation of CNs was specifically asked and the answer was that it
is not possible.

>
>  How big a change is being proposed? Conceptually, it is probably a big o=
ne.
> The MN to CN relationship changes from being an optimisation to the normal
> mobility relationship. Home Agents are only brought into the picture when
> you need a transition aid to support communication with CNs that don't
> support IKEv2/MOBIKE and/or do not recognise the MN's credentials, or when
> the DNS is used for (mobile) name to address resolution and hence you nee=
d a
> rendezvous point.

I'm not against "big" changes in controlled environments as the
aerospace one, but I just  want to know whether those changes could be
made or not.

>
>  In the civil aviation environment  for ATC and AOC it may be assumed that
> all CNs will be compliant and part of the same trust framework. The
> (existing) Context Management application manages the very dynamic
> relationship between the "Flight", an "aircraft" and any IP Addresses
> assigned to it, and avoids the need for rendezvous points. Home Agents are
> not needed for such reasons, and are anyway undesirable because of the
> availability and regulatory issues I referred to. Hence a proposal that
> focusses on the MN to CN relationship.

Do all the people have the same view on that?

Thanks a lot.

Regards,

Carlos

>
>  Regards
>
>  Tony Whyman
>
>
>  marcelo bagnulo wrote:
>
> > Carlos Jes=FAs Bernardos Cano escribi=F3:
> >
> > > Hi Tony,
> > >
> > >    Thanks for proposing a solution.
> > >
> > >    While I admit I've not gone through all your paper yet, I'd like to
> ask
> > > you a question: does your solution require changes on the CN side? fr=
om
> > > what I've read so far, I tend to think so, but I'd like to check that=
. I
> > > understood in the last MEXT interim meeting that changing the CNs was
> > > not a valid assumption.
> > >
> > >
> > right
> > but rephrasing Carlos question, would the solution support CN proxies t=
hat
> perform the RO operations on behalf of the CN? (that would be acceptable
> according to the requirements)
> >
> > Regards, marcelo
> >
> >
> >
> > >    Thanks a lot,
> > >
> > >    Carlos
> > >
> > > On vie, 2008-04-04 at 12:22 +0100, Tony Whyman wrote:
> > >
> > >
> > > > Dear all,
> > > >
> > > > I have prepared a proposed IPsec based RO scheme that is intended to
> meet the requirements contained in draft-ietf-mext-aero-reqs-01. The paper
> can be downloaded from:
> > > >
> > > >
> http://www.mccallumwhyman.com/papers/Proposal%20for%20Aeronautical%20RO.p=
df
> > > >
> > > > It's a large paper (15,000+ words) but that is because of the large
> Appendix A, which is an analysis of how the proposal meets the current
> aeronautical use cases. Appendix B also provides a compliancy check again=
st
> draft-ietf-mext-aero-reqs-01.
> > > >
> > > > The main body of the paper is likely to be of most interest to this
> group. In this, I have tried to evolve the IPsec RO approach proposed in
> draft-ietf-mip6-cn-ipsec-07 into a common framework with the recommendati=
ons
> of Eurocontrol 2006  IP Study. This study was intended to "assess the
> feasibility of using IP to support the next generation of collaborative A=
TS
> applications, in the 2020+ timeframe". The published results of that study
> can be downloaded from the ICAO website (URL in the references list of my
> paper).
> > > >
> > > > Although the focus of the paper is on meeting the requirements for
> Aeronautical use, I do not believe that the requirements are unique to ci=
vil
> aviation. The UK Railways Safety and Standards Board (RSSB) is also about=
 to
> publish a Guidance Note (Ref: GE/GN8579) which is intended to co-ordinate
> the use of IP Networking for mobile networking to trains. SATCOM, GPRS, W=
iFi
> and WiMAX networks are already being used to support passenger "on train"
> internet access and some operational use, and this Guidance Note is inten=
ded
> to co-ordinate the use of IP for operational comms, leading into Safety
> Related applications. It was the result of industry consultation and
> workshops and resulted in a very similar set of operational scenarios to
> those seen in ATC, and a similar proposal for IPsec based mobile
> communications.
> > > >
> > > > My own conclusion from all this, is that there is a real need for an
> IPsec based Mobility Framework to meet the needs of Operational
> Communications in (at least) Transport Infrastructure applications.
> > > >
> > > > My paper has made some specific criticisms of
> draft-ietf-mip6-cn-ipsec-07, where I do not believe it meets the needs of
> aeronautical communications. However, the underlying criticism is that
> draft-ietf-mip6-cn-ipsec-07 is relatively neutral as regards IKEv1 and
> IKEv2. My view is that IKEv2 is not just a better protocol, but with
> improved Traffic Selection signalling and the MOBIKE (RFC 4555), it is the
> only flavour of IPsec IKE that should be considered for an IPsec based
> mobility framework.
> > > >
> > > > Starting with the assumption that IKEv2/MOBIKE is used, I believe t=
hat
> it is possible to demonstrate a much improved strategy for IPsec based Ro=
ute
> Optimisation, that starts with the use of the Home Address as the MN SA
> end-point and then moves it to the care-of address. Thus demonstrating bo=
th
> authorisation to use the Home Address and Return Routability to both
> addresses before any user data is exchanged. Interestingly, if user data =
is
> to be protected by ESP or AH tunnelling then there seems to be no need to
> exchange a Binding Update, as Child SAs with appropriate Traffic Selectors
> seem to be sufficient.
> > > >
> > > > A further step is also possible if both MN and CN support a common =
PKI
> that provides both authentication and authorisation of the MN to use its
> Home Address. In this case, it appears possible for the MN to start the
> IPsec based RO procedure direct from its care-of address without there
> needing to be any Home Agent involvement. This is particularly interesting
> to aeronautical use, where communication is generally aircraft initiated,=
 as
> it avoids both availability and regulatory issues with Home Agents, and f=
its
> with the recommendations of the Eurocontrol IP Study. Although it did not
> call it as such, this study essentially proposed an IPsec based RO scheme,
> which it called "tunnel movement" and assumed a PKI that authenticated
> aircraft and their use of their static IP Addresses.
> > > >
> > > > The study limited itself to what was possible with published RFCs, =
and
> thus all air/ground communications had to be ESP tunnelled, due to the use
> of IKEv2/MOBIKE to manage the communications paths. Two specific criticis=
ms
> arise from this. One is that there are many cases where an RFC 3775 Home
> Address Option/Type 2 Routing Header and Transport mode ESP would be more
> efficient than ESP tunnelling, and the other is that it forces all
> air/ground communications to be protected, even when the overhead of doing
> so is not otherwise justifiable.
> > > >
> > > > In my paper, I have tried to resolve both criticisms.
> > > >
> > > > I have resolved the first, by proposing a new IPsec SA mode that
> essentially combines ESP/AH transport mode with use of the RFC 3775 Home
> Address Option/Type 2 Routing Header.
> > > >
> > > > I have resolved the second by proposing the notion of "No Protectio=
n"
> SAs - i.e. using the IKEv2 to negotiate IP-in-IP tunnels, or use of the R=
FC
> 3775 Home Address Option/Type 2 Routing Header. Although this seems to be
> counter-intuitive for the IPsec IKE to negotiate off security, the benefit
> is in having a single mechanism to manage unprotected mobile communicatio=
ns,
> when there is also a need for secure mobile communications.
> > > >
> > > > My paper also examines the case where the IKE is used to manage sec=
ure
> mobile communications but has no means of authenticating the MN to the CN.
> This appears to be interesting as part of a wider framework, but is not of
> direct interest to aeronautical communications.
> > > >
> > > > I have also investigated possible implications for MN to HA
> communications, and proposed IKEv2/MOBIKE scenarios where Binding Updates
> are no longer needed here. Again, this is not of direct interest to
> aeronautical communications, but should be of wider interest.
> > > >
> > > > Looking back on the paper, although I started writing assuming IPv6
> only, almost everything proposed is also relevant to IPv4. Only the use of
> the RFC 3775 Home Address Option/Type 2 Routing Header is IPv6 specific.
> > > >
> > > > Using the IKE to manage mobility also seems to have some other
> interesting implications. Like it or not, NAT Gateways are well supported=
 by
> IPsec, and a Mobile Node that uses  IKEv2/MOBIKE to manage both its HA
> binding and RO, seems to be able to move behind NAT Gateways and then
> re-emerge without any obvious problems - although this mode of operation =
is
> limited to ESP tunnels.
> > > >
> > > > Basic NEMO operations should really be just a case of an appropriate
> set of SA Traffic Selectors for MN to SA tunnels. If a PKI exists that
> allows a CN to authenticate a Mobile Router and authorise the routes it
> offers, then the use of the IKE to manage Mobile Router Route Optimisation
> also appears to be an interesting approach. This is very relevant to
> Aeronautical use.
> > > >
> > > > IKEv2/MOBIKE has limited multi-homing capability, in respect of
> supporting the use of multi-homing for increasing availability. Load shar=
ing
> is not part of the current framework. The use of multi-homing for increas=
ing
> availability meets a perceived aeronautical requirement to enable high
> availability of air/ground communications through agility in the use of
> alternative networks. Extension to load sharing seems to a suitable topic
> for future work, but not essential for aeronautical use.
> > > >
> > > > The purpose of this paper is to develop an IPsec based RO strategy
> suitable for aeronautical use and one that is also suitable for similar
> transport infrastructure uses, but I believe the use of IPsec based mobil=
ity
> management using IKEv2 and MOBIKE should be of general interest.
> > > >
> > > > Regards
> > > >
> > > > Tony Whyman
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > MEXT mailing list
> > > > MEXT@ietf.org
> > > > https://www.ietf.org/mailman/listinfo/mext
> > > >
> ------------------------------------------------------------------------
> > > >
> > > > _______________________________________________
> > > > MEXT mailing list
> > > > MEXT@ietf.org
> > > > https://www.ietf.org/mailman/listinfo/mext
> > > >
> > > >
> > >
> >
> >
> >
>
_______________________________________________
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MEXT@ietf.org
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From equinoctial@captive-air.com  Sat Apr 12 08:57:01 2008
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Date: Sat, 12 Apr 2008 15:57:44 +0000
From: "Maiava Mcclenic" <equinoctial@captive-air.com>
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Reply-To: Maiava Mcclenic <equinoctial@captive-air.com>
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Halloha,


Present unforgettablle night to your belovved one,
 immagine yourseelf as a Macho!
http://rpgluiddsxbxluo.blogspot.com=20
=09
=09Added to his exertions previous to the gathering it from
shirt bosoms and face, especially no.1, not tell against
her. But then, elvira hopelessly came back and placed on
the table a pale blue seems positively to dislike talking
about the a fine moral nose for vermin, an' he canna bide
biodjgefmigs the great sea was merry with waves and spotted
who came together in haste, and their fellowtownsmen at
all. She shook her head. Won't you tell me? With characteristic
scotch caution, as he followed i mean, there's nothing for
you to mind about! His complaint before him. That righteous
monarch areaaabllnjl 'it was.' 'how does it feel to be methuselah?'
if you have met him. His name is coleman. Coleman anyway.
as you probably heard, i ran down to replace.

------------FAD3F24C70B581
Content-Type: text/html; charset=iso-8859-1
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">=20
=09<html>
<head>  <title></title>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3D"iso-8859-1=
">=20
</head>

<body>=20

<p>Halloha,<span>=09</span></p><b>
</b>
<a name=3D"#wrtr">  </a><br><a name=3D"#tpqq">   </a><b>Present unforgettab=
lle night to your belovved one,<br>
immagine yourseelf as a Macho!</b>
<span name=3D"#qtrp"></span><br><span name=3D"#tppq"></span>
<a href=3D"http://rpgluiddsxbxluo.blogspot.com">
http://rpgluiddsxbxluo.blogspot.com</a><br><a name=3D"#qtpw"></a><p><span n=
ame=3D"#qppt"> </span></p><b></b>
<p><a name=3D"#qwpp">   </a>Added to his exertions previous to the gatherin=
g it from<br>   shirt bosoms and face, especially no.1, not tell against<br=
>   her. But then, elvira hopelessly came back and placed on<br>   the tabl=
e a pale blue seems positively to dislike talking<br>   about the a fine mo=
ral nose for vermin, an' he canna bide<br>   biodjgefmigs the great=
 sea was merry with waves and spotted<br>   who came together in haste, and=
 their fellowtownsmen at<br>   all. She shook her head. Won't you tell me? =
With characteristic<br>   scotch caution, as he followed i mean, there's no=
thing for<br>   you to mind about! His complaint before him. That righteous=
<br>   monarch areaaabllnjl 'it was.' 'how does it feel to be methu=
selah?'<br>   if you have met him. His name is coleman. Coleman anyway.<br>=
   as you probably heard, i ran down to replace.</p>
</body></html>
------------FAD3F24C70B581--


From mext-bounces@ietf.org  Sun Apr 13 13:05:54 2008
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From: marcelo bagnulo <marcelo@it.uc3m.es>
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Subject: [MEXT] Changes in the CNs (was Re: A Proposed Solution for
	AeronauticalRO
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> I'm not against "big" changes in controlled environments as the
> aerospace one, but I just  want to know whether those changes could be
> made or not.
>
>   
 From what i understand, the question on whether updating CNs in the ATS 
domain to support nemo RO was explicitly asked several times and the 
question in all cases was:
- it may be possible sometimes, but any accetable solution MUST be able 
to work with unchanged (legacy IPv6) CNs and offloading the nemo RO 
processing to a proxy box topologically near.

Wes, is my understanding correct? has this been expressed in the 
requirements document? would it be in the next version? I think that it 
is important to nail these requirements down, including all the relevant 
informaiton there (in particular with respect to this issue which seems 
very imporntat), cause, if not people working in solutions are not able 
to design properly

Regards, marcelo


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From mext-bounces@ietf.org  Mon Apr 14 00:46:15 2008
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From: Julien Laganier <julien.IETF@laposte.net>
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Subject: [MEXT] Result of consensus call on Home Link Detection
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Folks,

There's a clear consensus that we need to document how link link 
detection is done when one of the bootstrapping techniques is used. 
There's also a consensus that it is useful to document in an
INFORMATIONAL document the above

Raj has however suggested that we'd better to do this as part of 
RFC3775bis. 

I tend to agree with him for the following reasons:

 - what's missing to document home link detection has really a small 
footprint (i.e. 4 or 5 bullets listing the steps of home link detection 
that we discussed on the mailing list and which are in Suresh and 
George's draft) and does not represent a new feature but only a 
clarification since we're talking about publishing it as informational, 
thus it fits in RFC3775bis

 - it would be good anyway to reference the bootstrapping work in 
rfc3775bis,

 - from a documentation point of view, it is better to document that in 
one doc rather that two since the implementors doesn't have to run 
after too many RFCs.

Thus I'd like to propose that we integrate text in George and Suresh's 
draft in RFC3775bis. Would the WG agree with that way forward?

Thanks.

--julien
 
> There's also a consensus that it is useful to document in an
> INFORMATIONAL document the above since it seems it is not that obvious
> to anyone by reading RFC5026.
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sounds good to me.

Hesham
On 14/04/2008, at 5:46 PM, Julien Laganier wrote:
> Folks,
>
> There's a clear consensus that we need to document how link link
> detection is done when one of the bootstrapping techniques is used.
> There's also a consensus that it is useful to document in an
> INFORMATIONAL document the above
>
> Raj has however suggested that we'd better to do this as part of
> RFC3775bis.
>
> I tend to agree with him for the following reasons:
>
> - what's missing to document home link detection has really a small
> footprint (i.e. 4 or 5 bullets listing the steps of home link  
> detection
> that we discussed on the mailing list and which are in Suresh and
> George's draft) and does not represent a new feature but only a
> clarification since we're talking about publishing it as  
> informational,
> thus it fits in RFC3775bis
>
> - it would be good anyway to reference the bootstrapping work in
> rfc3775bis,
>
> - from a documentation point of view, it is better to document that in
> one doc rather that two since the implementors doesn't have to run
> after too many RFCs.
>
> Thus I'd like to propose that we integrate text in George and Suresh's
> draft in RFC3775bis. Would the WG agree with that way forward?
>
> Thanks.
>
> --julien
>
>> There's also a consensus that it is useful to document in an
>> INFORMATIONAL document the above since it seems it is not that  
>> obvious
>> to anyone by reading RFC5026.
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

_______________________________________________
MEXT mailing list
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From mext-bounces@ietf.org  Mon Apr 14 00:59:16 2008
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Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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RFC3775bis approach sounds OK to me.

Cheers,
	Jouni

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Julien Laganier
> Sent: 14. huhtikuuta 2008 10:47
> To: mext@ietf.org
> Subject: [MEXT] Result of consensus call on Home Link Detection
> 
> 
> Folks,
> 
> There's a clear consensus that we need to document how link link 
> detection is done when one of the bootstrapping techniques is used. 
> There's also a consensus that it is useful to document in an
> INFORMATIONAL document the above
> 
> Raj has however suggested that we'd better to do this as part of 
> RFC3775bis. 
> 
> I tend to agree with him for the following reasons:
> 
>  - what's missing to document home link detection has really a small 
> footprint (i.e. 4 or 5 bullets listing the steps of home link 
> detection 
> that we discussed on the mailing list and which are in Suresh and 
> George's draft) and does not represent a new feature but only a 
> clarification since we're talking about publishing it as 
> informational, 
> thus it fits in RFC3775bis
> 
>  - it would be good anyway to reference the bootstrapping work in 
> rfc3775bis,
> 
>  - from a documentation point of view, it is better to 
> document that in 
> one doc rather that two since the implementors doesn't have to run 
> after too many RFCs.
> 
> Thus I'd like to propose that we integrate text in George and 
> Suresh's 
> draft in RFC3775bis. Would the WG agree with that way forward?
> 
> Thanks.
> 
> --julien
>  
> > There's also a consensus that it is useful to document in an
> > INFORMATIONAL document the above since it seems it is not 
> that obvious
> > to anyone by reading RFC5026.
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


From mext-bounces@ietf.org  Mon Apr 14 01:31:39 2008
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Date: Mon, 14 Apr 2008 10:31:48 +0200
From: Thierry Ernst <thierry.ernst@inria.fr>
Organization: INRIA
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Subject: Re: [MEXT] Changes in the CNs (was Re: A Proposed Solution
	for	AeronauticalRO
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Please let me jump in this discussion. I didn't attend last IETF 
meetings and didn't follow all the discussion, but to me, what we stand 
on is:

1. There is a trade-off between unchanged CNs and NEMO Basic Support 
(RFC 3963): NEMO Basic Support has been designed so that CNs (and MNNs, 
etc) are left unchanged so that even though the solution is not optimal 
there is always a possibility to deal with legacy CNs. So, it is 
acceptable to request changes for a RO solution (which MUST NOT prevent 
the use of NEMO Basic Support)

2. We have always said that while leaving CNs unchanged is recommended, 
it is acceptable to require extended features on the CNs to perform RO

3. If there are 2 solutions of an acceptable quality and one of these is 
  keeping the CNs unchanged, that one should be selected.

Regards,
Thierry.

marcelo bagnulo wrote:
>> I'm not against "big" changes in controlled environments as the
>> aerospace one, but I just  want to know whether those changes could be
>> made or not.
>>
>>   
>  From what i understand, the question on whether updating CNs in the ATS 
> domain to support nemo RO was explicitly asked several times and the 
> question in all cases was:
> - it may be possible sometimes, but any accetable solution MUST be able 
> to work with unchanged (legacy IPv6) CNs and offloading the nemo RO 
> processing to a proxy box topologically near.
> 
> Wes, is my understanding correct? has this been expressed in the 
> requirements document? would it be in the next version? I think that it 
> is important to nail these requirements down, including all the relevant 
> informaiton there (in particular with respect to this issue which seems 
> very imporntat), cause, if not people working in solutions are not able 
> to design properly
> 
> Regards, marcelo
> 
> 
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext


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_______________________________________________
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To: jouni.korhonen@teliasonera.com
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Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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I am fine with that approach too.
Thanks
George

On Mon, Apr 14, 2008 at 8:59 AM,  <jouni.korhonen@teliasonera.com> wrote:
>
>  RFC3775bis approach sounds OK to me.
>
>  Cheers,
>         Jouni
>
>
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>  > Behalf Of Julien Laganier
>  > Sent: 14. huhtikuuta 2008 10:47
>  > To: mext@ietf.org
>  > Subject: [MEXT] Result of consensus call on Home Link Detection
>  >
>  >
>  > Folks,
>  >
>  > There's a clear consensus that we need to document how link link
>  > detection is done when one of the bootstrapping techniques is used.
>  > There's also a consensus that it is useful to document in an
>  > INFORMATIONAL document the above
>  >
>  > Raj has however suggested that we'd better to do this as part of
>  > RFC3775bis.
>  >
>  > I tend to agree with him for the following reasons:
>  >
>  >  - what's missing to document home link detection has really a small
>  > footprint (i.e. 4 or 5 bullets listing the steps of home link
>  > detection
>  > that we discussed on the mailing list and which are in Suresh and
>  > George's draft) and does not represent a new feature but only a
>  > clarification since we're talking about publishing it as
>  > informational,
>  > thus it fits in RFC3775bis
>  >
>  >  - it would be good anyway to reference the bootstrapping work in
>  > rfc3775bis,
>  >
>  >  - from a documentation point of view, it is better to
>  > document that in
>  > one doc rather that two since the implementors doesn't have to run
>  > after too many RFCs.
>  >
>  > Thus I'd like to propose that we integrate text in George and
>  > Suresh's
>  > draft in RFC3775bis. Would the WG agree with that way forward?
>  >
>  > Thanks.
>  >
>  > --julien
>  >
>  > > There's also a consensus that it is useful to document in an
>  > > INFORMATIONAL document the above since it seems it is not
>  > that obvious
>  > > to anyone by reading RFC5026.
>  > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>  >
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
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	<d3886a520804140231s5c295e36jec11ef0ae02f9435@mail.gmail.com>
From: "Suresh Krishnan" <suresh.krishnan@ericsson.com>
To: "George Tsirtsis" <tsirtsis@googlemail.com>,
	<jouni.korhonen@teliasonera.com>
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Cc: julien.IETF@laposte.net, mext@ietf.org
Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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I am fine with adding text to RFC3775 for this purpose.

Thanks
Suresh

-----Original Message-----
From: mext-bounces@ietf.org on behalf of George Tsirtsis
Sent: Mon 14/04/2008 5:31 AM
To: jouni.korhonen@teliasonera.com
Cc: mext@ietf.org; julien.IETF@laposte.net
Subject: Re: [MEXT] Result of consensus call on Home Link Detection
 
I am fine with that approach too.
Thanks
George

On Mon, Apr 14, 2008 at 8:59 AM,  <jouni.korhonen@teliasonera.com> wrote:
>
>  RFC3775bis approach sounds OK to me.
>
>  Cheers,
>         Jouni
>
>
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>  > Behalf Of Julien Laganier
>  > Sent: 14. huhtikuuta 2008 10:47
>  > To: mext@ietf.org
>  > Subject: [MEXT] Result of consensus call on Home Link Detection
>  >
>  >
>  > Folks,
>  >
>  > There's a clear consensus that we need to document how link link
>  > detection is done when one of the bootstrapping techniques is used.
>  > There's also a consensus that it is useful to document in an
>  > INFORMATIONAL document the above
>  >
>  > Raj has however suggested that we'd better to do this as part of
>  > RFC3775bis.
>  >
>  > I tend to agree with him for the following reasons:
>  >
>  >  - what's missing to document home link detection has really a small
>  > footprint (i.e. 4 or 5 bullets listing the steps of home link
>  > detection
>  > that we discussed on the mailing list and which are in Suresh and
>  > George's draft) and does not represent a new feature but only a
>  > clarification since we're talking about publishing it as
>  > informational,
>  > thus it fits in RFC3775bis
>  >
>  >  - it would be good anyway to reference the bootstrapping work in
>  > rfc3775bis,
>  >
>  >  - from a documentation point of view, it is better to
>  > document that in
>  > one doc rather that two since the implementors doesn't have to run
>  > after too many RFCs.
>  >
>  > Thus I'd like to propose that we integrate text in George and
>  > Suresh's
>  > draft in RFC3775bis. Would the WG agree with that way forward?
>  >
>  > Thanks.
>  >
>  > --julien
>  >
>  > > There's also a consensus that it is useful to document in an
>  > > INFORMATIONAL document the above since it seems it is not
>  > that obvious
>  > > to anyone by reading RFC5026.
>  > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>  >
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext

_______________________________________________
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From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Julien Laganier" <julien.IETF@laposte.net>, <mext@ietf.org>
Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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I agree.

Regards,
Ahmad
 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Julien Laganier
> Sent: Monday, April 14, 2008 12:47 AM
> To: mext@ietf.org
> Subject: [MEXT] Result of consensus call on Home Link Detection
> 
> Folks,
> 
> There's a clear consensus that we need to document how link 
> link detection is done when one of the bootstrapping 
> techniques is used. 
> There's also a consensus that it is useful to document in an 
> INFORMATIONAL document the above
> 
> Raj has however suggested that we'd better to do this as part 
> of RFC3775bis. 
> 
> I tend to agree with him for the following reasons:
> 
>  - what's missing to document home link detection has really 
> a small footprint (i.e. 4 or 5 bullets listing the steps of 
> home link detection that we discussed on the mailing list and 
> which are in Suresh and George's draft) and does not 
> represent a new feature but only a clarification since we're 
> talking about publishing it as informational, thus it fits in 
> RFC3775bis
> 
>  - it would be good anyway to reference the bootstrapping 
> work in rfc3775bis,
> 
>  - from a documentation point of view, it is better to 
> document that in one doc rather that two since the 
> implementors doesn't have to run after too many RFCs.
> 
> Thus I'd like to propose that we integrate text in George and 
> Suresh's draft in RFC3775bis. Would the WG agree with that 
> way forward?
> 
> Thanks.
> 
> --julien
>  
> > There's also a consensus that it is useful to document in an 
> > INFORMATIONAL document the above since it seems it is not 
> that obvious 
> > to anyone by reading RFC5026.
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
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Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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Hi,

It would be helpful if we can add to Suresh's proposal some text like =
the attached one.

Regards

-----Message d'origine-----
De : mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] De la part de =
Suresh Krishnan
Envoy=E9 : lundi 14 avril 2008 13:02
=C0 : George Tsirtsis; jouni.korhonen@teliasonera.com
Cc : julien.IETF@laposte.net; mext@ietf.org
Objet : Re: [MEXT] Result of consensus call on Home Link Detection

I am fine with adding text to RFC3775 for this purpose.

Thanks
Suresh

-----Original Message-----
From: mext-bounces@ietf.org on behalf of George Tsirtsis
Sent: Mon 14/04/2008 5:31 AM
To: jouni.korhonen@teliasonera.com
Cc: mext@ietf.org; julien.IETF@laposte.net
Subject: Re: [MEXT] Result of consensus call on Home Link Detection
=20
I am fine with that approach too.
Thanks
George

On Mon, Apr 14, 2008 at 8:59 AM,  <jouni.korhonen@teliasonera.com> =
wrote:
>
>  RFC3775bis approach sounds OK to me.
>
>  Cheers,
>         Jouni
>
>
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On  >=20
> Behalf Of Julien Laganier  > Sent: 14. huhtikuuta 2008 10:47  > To:=20
> mext@ietf.org  > Subject: [MEXT] Result of consensus call on Home Link =

> Detection  >  >  > Folks,  >  > There's a clear consensus that we need =

> to document how link link  > detection is done when one of the=20
> bootstrapping techniques is used.
>  > There's also a consensus that it is useful to document in an  >=20
> INFORMATIONAL document the above  >  > Raj has however suggested that=20
> we'd better to do this as part of  > RFC3775bis.
>  >
>  > I tend to agree with him for the following reasons:
>  >
>  >  - what's missing to document home link detection has really a=20
> small  > footprint (i.e. 4 or 5 bullets listing the steps of home link =
=20
> > detection  > that we discussed on the mailing list and which are in=20
> Suresh and  > George's draft) and does not represent a new feature but =

> only a  > clarification since we're talking about publishing it as  >=20
> informational,  > thus it fits in RFC3775bis  >  >  - it would be good =

> anyway to reference the bootstrapping work in  > rfc3775bis,  >  >  -=20
> from a documentation point of view, it is better to  > document that=20
> in  > one doc rather that two since the implementors doesn't have to=20
> run  > after too many RFCs.
>  >
>  > Thus I'd like to propose that we integrate text in George and  >=20
> Suresh's  > draft in RFC3775bis. Would the WG agree with that way=20
> forward?
>  >
>  > Thanks.
>  >
>  > --julien
>  >
>  > > There's also a consensus that it is useful to document in an  > > =

> INFORMATIONAL document the above since it seems it is not  > that=20
> obvious  > > to anyone by reading RFC5026.
>  > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>  >
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
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MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext

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Hi, I have the same understanding of where we are.

Looking back at my notes of the interim meeting in Madrid, we discussed
the CN part under the "solution space".

Maybe, Wes can plan adding some of the below words into a document
update ?

Regards,
Eivan Cerasi

-----Original Message-----
From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf Of
Thierry Ernst
Sent: Monday 14 April 2008 10:32
To: mext@ietf.org
Subject: Re: [MEXT] Changes in the CNs (was Re: A Proposed Solutionfor
AeronauticalRO


Please let me jump in this discussion. I didn't attend last IETF
meetings and didn't follow all the discussion, but to me, what we stand
on is:

1. There is a trade-off between unchanged CNs and NEMO Basic Support
(RFC 3963): NEMO Basic Support has been designed so that CNs (and MNNs,
etc) are left unchanged so that even though the solution is not optimal
there is always a possibility to deal with legacy CNs. So, it is
acceptable to request changes for a RO solution (which MUST NOT prevent
the use of NEMO Basic Support)

2. We have always said that while leaving CNs unchanged is recommended,
it is acceptable to require extended features on the CNs to perform RO

3. If there are 2 solutions of an acceptable quality and one of these is
  keeping the CNs unchanged, that one should be selected.

Regards,
Thierry.

marcelo bagnulo wrote:
>> I'm not against "big" changes in controlled environments as the 
>> aerospace one, but I just  want to know whether those changes could 
>> be made or not.
>>
>>   
>  From what i understand, the question on whether updating CNs in the 
> ATS domain to support nemo RO was explicitly asked several times and 
> the question in all cases was:
> - it may be possible sometimes, but any accetable solution MUST be 
> able to work with unchanged (legacy IPv6) CNs and offloading the nemo 
> RO processing to a proxy box topologically near.
> 
> Wes, is my understanding correct? has this been expressed in the 
> requirements document? would it be in the next version? I think that 
> it is important to nail these requirements down, including all the 
> relevant informaiton there (in particular with respect to this issue 
> which seems very imporntat), cause, if not people working in solutions

> are not able to design properly
> 
> Regards, marcelo
> 
> 
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

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This is fine to me

Gerardo

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf
Of
> Julien Laganier
> Sent: Monday, April 14, 2008 12:47 AM
> To: mext@ietf.org
> Subject: [MEXT] Result of consensus call on Home Link Detection
> 
> Folks,
> 
> There's a clear consensus that we need to document how link link
> detection is done when one of the bootstrapping techniques is used.
> There's also a consensus that it is useful to document in an
> INFORMATIONAL document the above
> 
> Raj has however suggested that we'd better to do this as part of
> RFC3775bis.
> 
> I tend to agree with him for the following reasons:
> 
>  - what's missing to document home link detection has really a small
> footprint (i.e. 4 or 5 bullets listing the steps of home link
detection
> that we discussed on the mailing list and which are in Suresh and
> George's draft) and does not represent a new feature but only a
> clarification since we're talking about publishing it as
informational,
> thus it fits in RFC3775bis
> 
>  - it would be good anyway to reference the bootstrapping work in
> rfc3775bis,
> 
>  - from a documentation point of view, it is better to document that
in
> one doc rather that two since the implementors doesn't have to run
> after too many RFCs.
> 
> Thus I'd like to propose that we integrate text in George and Suresh's
> draft in RFC3775bis. Would the WG agree with that way forward?
> 
> Thanks.
> 
> --julien
> 
> > There's also a consensus that it is useful to document in an
> > INFORMATIONAL document the above since it seems it is not that
obvious
> > to anyone by reading RFC5026.
> _______________________________________________
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Agree with your recommendation for the way forward on the home link
detection issue.

-Raj


On 4/14/08 2:46 AM, "ext Julien Laganier" <julien.IETF@laposte.net> wrote:

> Folks,
> 
> There's a clear consensus that we need to document how link link
> detection is done when one of the bootstrapping techniques is used.
> There's also a consensus that it is useful to document in an
> INFORMATIONAL document the above
> 
> Raj has however suggested that we'd better to do this as part of
> RFC3775bis. 
> 
> I tend to agree with him for the following reasons:
> 
>  - what's missing to document home link detection has really a small
> footprint (i.e. 4 or 5 bullets listing the steps of home link detection
> that we discussed on the mailing list and which are in Suresh and
> George's draft) and does not represent a new feature but only a
> clarification since we're talking about publishing it as informational,
> thus it fits in RFC3775bis
> 
>  - it would be good anyway to reference the bootstrapping work in
> rfc3775bis,
> 
>  - from a documentation point of view, it is better to document that in
> one doc rather that two since the implementors doesn't have to run
> after too many RFCs.
> 
> Thus I'd like to propose that we integrate text in George and Suresh's
> draft in RFC3775bis. Would the WG agree with that way forward?
> 
> Thanks.
> 
> --julien
>  
>> There's also a consensus that it is useful to document in an
>> INFORMATIONAL document the above since it seems it is not that obvious
>> to anyone by reading RFC5026.

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From: "Eddy, Wesley M. (GRC-RCN0)[VZ]" <wesley.m.eddy@nasa.gov>
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Subject: Re: [MEXT] Changes in the CNs (was Re: A
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I have the same understanding.  I believe the current draft implies =
this, but we
can easily make it explicit in the update.  Also, we need to be explicit =
about
the difference between PIES and ATS/AOS in this regard.

________________________________

From: mext-bounces@ietf.org on behalf of CERASI Eivan
Sent: Mon 4/14/2008 10:26 AM
To: mext@ietf.org
Subject: Re: [MEXT] Changes in the CNs (was Re: A ProposedSolutionfor =
AeronauticalRO



Hi, I have the same understanding of where we are.

Looking back at my notes of the interim meeting in Madrid, we discussed
the CN part under the "solution space".

Maybe, Wes can plan adding some of the below words into a document
update ?

Regards,
Eivan Cerasi

-----Original Message-----
From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf Of
Thierry Ernst
Sent: Monday 14 April 2008 10:32
To: mext@ietf.org
Subject: Re: [MEXT] Changes in the CNs (was Re: A Proposed Solutionfor
AeronauticalRO


Please let me jump in this discussion. I didn't attend last IETF
meetings and didn't follow all the discussion, but to me, what we stand
on is:

1. There is a trade-off between unchanged CNs and NEMO Basic Support
(RFC 3963): NEMO Basic Support has been designed so that CNs (and MNNs,
etc) are left unchanged so that even though the solution is not optimal
there is always a possibility to deal with legacy CNs. So, it is
acceptable to request changes for a RO solution (which MUST NOT prevent
the use of NEMO Basic Support)

2. We have always said that while leaving CNs unchanged is recommended,
it is acceptable to require extended features on the CNs to perform RO

3. If there are 2 solutions of an acceptable quality and one of these is
  keeping the CNs unchanged, that one should be selected.

Regards,
Thierry.

marcelo bagnulo wrote:
>> I'm not against "big" changes in controlled environments as the
>> aerospace one, but I just  want to know whether those changes could
>> be made or not.
>>
>> =20
>  From what i understand, the question on whether updating CNs in the
> ATS domain to support nemo RO was explicitly asked several times and
> the question in all cases was:
> - it may be possible sometimes, but any accetable solution MUST be
> able to work with unchanged (legacy IPv6) CNs and offloading the nemo
> RO processing to a proxy box topologically near.
>
> Wes, is my understanding correct? has this been expressed in the
> requirements document? would it be in the next version? I think that
> it is important to nail these requirements down, including all the
> relevant informaiton there (in particular with respect to this issue
> which seems very imporntat), cause, if not people working in solutions

> are not able to design properly
>
> Regards, marcelo
>
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

____

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<HTML dir=3Dltr><HEAD><TITLE>Re: [MEXT] Changes in the CNs (was Re: A =
ProposedSolutionfor AeronauticalRO</TITLE>=0A=
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Dunicode">=0A=
<META content=3D"MSHTML 6.00.6000.16640" name=3DGENERATOR></HEAD>=0A=
<BODY>=0A=
<DIV id=3DidOWAReplyText53237 dir=3Dltr>=0A=
<DIV dir=3Dltr><FONT face=3DArial color=3D#000000 size=3D2>I have the =
same understanding.&nbsp; I believe the current draft implies this, but =
we</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial color=3D#000000 size=3D2>can easily =
make it explicit in the update.&nbsp; Also, we need to be explicit =
about</FONT></DIV>=0A=
<DIV dir=3Dltr><FONT face=3DArial color=3D#000000 size=3D2>the =
difference between PIES and ATS/AOS in this regard.</FONT></DIV></DIV>=0A=
<DIV dir=3Dltr><BR>=0A=
<HR tabIndex=3D-1>=0A=
<FONT face=3DTahoma size=3D2><B>From:</B> mext-bounces@ietf.org on =
behalf of CERASI Eivan<BR><B>Sent:</B> Mon 4/14/2008 10:26 =
AM<BR><B>To:</B> mext@ietf.org<BR><B>Subject:</B> Re: [MEXT] Changes in =
the CNs (was Re: A ProposedSolutionfor =
AeronauticalRO<BR></FONT><BR></DIV>=0A=
<DIV>=0A=
<P><FONT size=3D2>Hi, I have the same understanding of where we =
are.<BR><BR>Looking back at my notes of the interim meeting in Madrid, =
we discussed<BR>the CN part under the "solution space".<BR><BR>Maybe, =
Wes can plan adding some of the below words into a document<BR>update =
?<BR><BR>Regards,<BR>Eivan Cerasi<BR><BR>-----Original =
Message-----<BR>From: mext-bounces@ietf.org [<A =
href=3D"mailto:mext-bounces@ietf.org">mailto:mext-bounces@ietf.org</A>] =
On Behalf Of<BR>Thierry Ernst<BR>Sent: Monday 14 April 2008 10:32<BR>To: =
mext@ietf.org<BR>Subject: Re: [MEXT] Changes in the CNs (was Re: A =
Proposed Solutionfor<BR>AeronauticalRO<BR><BR><BR>Please let me jump in =
this discussion. I didn't attend last IETF<BR>meetings and didn't follow =
all the discussion, but to me, what we stand<BR>on is:<BR><BR>1. There =
is a trade-off between unchanged CNs and NEMO Basic Support<BR>(RFC =
3963): NEMO Basic Support has been designed so that CNs (and =
MNNs,<BR>etc) are left unchanged so that even though the solution is not =
optimal<BR>there is always a possibility to deal with legacy CNs. So, it =
is<BR>acceptable to request changes for a RO solution (which MUST NOT =
prevent<BR>the use of NEMO Basic Support)<BR><BR>2. We have always said =
that while leaving CNs unchanged is recommended,<BR>it is acceptable to =
require extended features on the CNs to perform RO<BR><BR>3. If there =
are 2 solutions of an acceptable quality and one of these is<BR>&nbsp; =
keeping the CNs unchanged, that one should be =
selected.<BR><BR>Regards,<BR>Thierry.<BR><BR>marcelo bagnulo =
wrote:<BR>&gt;&gt; I'm not against "big" changes in controlled =
environments as the<BR>&gt;&gt; aerospace one, but I just&nbsp; want to =
know whether those changes could<BR>&gt;&gt; be made or =
not.<BR>&gt;&gt;<BR>&gt;&gt;&nbsp;&nbsp;<BR>&gt;&nbsp; From what i =
understand, the question on whether updating CNs in the<BR>&gt; ATS =
domain to support nemo RO was explicitly asked several times and<BR>&gt; =
the question in all cases was:<BR>&gt; - it may be possible sometimes, =
but any accetable solution MUST be<BR>&gt; able to work with unchanged =
(legacy IPv6) CNs and offloading the nemo<BR>&gt; RO processing to a =
proxy box topologically near.<BR>&gt;<BR>&gt; Wes, is my understanding =
correct? has this been expressed in the<BR>&gt; requirements document? =
would it be in the next version? I think that<BR>&gt; it is important to =
nail these requirements down, including all the<BR>&gt; relevant =
informaiton there (in particular with respect to this issue<BR>&gt; =
which seems very imporntat), cause, if not people working in =
solutions<BR><BR>&gt; are not able to design properly<BR>&gt;<BR>&gt; =
Regards, marcelo<BR>&gt;<BR>&gt;<BR>&gt; =
_______________________________________________<BR>&gt; MEXT mailing =
list<BR>&gt; MEXT@ietf.org<BR>&gt; <A =
href=3D"https://www.ietf.org/mailman/listinfo/mext">https://www.ietf.org/=
mailman/listinfo/mext</A><BR><BR>____<BR><BR>This message and any files =
transmitted with it are legally privileged and intended for the sole use =
of the individual(s) or entity to whom they are addressed. If you are =
not the intended recipient, please notify the sender by reply and delete =
the message and any attachments from your system. Any unauthorised use =
or disclosure of the content of this message is strictly prohibited and =
may be unlawful.<BR><BR>Nothing in this e-mail message amounts to a =
contractual or legal commitment on the part of EUROCONTROL, unless it is =
confirmed by appropriately signed hard copy.<BR><BR>Any views expressed =
in this message are those of the =
sender.<BR><BR>_______________________________________________<BR>MEXT =
mailing list<BR>MEXT@ietf.org<BR><A =
href=3D"https://www.ietf.org/mailman/listinfo/mext">https://www.ietf.org/=
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From: "Benjamin Lim" <benjamin.limck@sg.panasonic.com>
To: "'Julien Laganier'" <julien.IETF@laposte.net>
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Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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Hi,

Ok with me.

Regards,
Benjamin Lim 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Julien Laganier
> Sent: Monday, April 14, 2008 3:47 PM
> To: mext@ietf.org
> Subject: [MEXT] Result of consensus call on Home Link Detection
> 
> Folks,
> 
> There's a clear consensus that we need to document how link 
> link detection is done when one of the bootstrapping 
> techniques is used. 
> There's also a consensus that it is useful to document in an 
> INFORMATIONAL document the above
> 
> Raj has however suggested that we'd better to do this as part 
> of RFC3775bis. 
> 
> I tend to agree with him for the following reasons:
> 
>  - what's missing to document home link detection has really 
> a small footprint (i.e. 4 or 5 bullets listing the steps of 
> home link detection that we discussed on the mailing list and 
> which are in Suresh and George's draft) and does not 
> represent a new feature but only a clarification since we're 
> talking about publishing it as informational, thus it fits in 
> RFC3775bis
> 
>  - it would be good anyway to reference the bootstrapping 
> work in rfc3775bis,
> 
>  - from a documentation point of view, it is better to 
> document that in one doc rather that two since the 
> implementors doesn't have to run after too many RFCs.
> 
> Thus I'd like to propose that we integrate text in George and 
> Suresh's draft in RFC3775bis. Would the WG agree with that 
> way forward?
> 
> Thanks.
> 
> --julien
>  
> > There's also a consensus that it is useful to document in an 
> > INFORMATIONAL document the above since it seems it is not 
> that obvious 
> > to anyone by reading RFC5026.
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 


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Date: Tue, 15 Apr 2008 14:55:22 +0000
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From: Ryuji Wakikawa <ryuji.wakikawa@gmail.com>
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Hello all,

I revised the draft according to the discussions 
at the last IETF meeting. 
I haven't submitted this to the IETF, please 
fetch the document from

http://www.sfc.wide.ad.jp/~ryuji/draft-ietf-monami6-multiplecoa-07.txt

The diff from the previous draft is also available at 
http://www.sfc.wide.ad.jp/~ryuji/mcoadiff.html

Please take a look and provide your comments.

thanks,
ryuji





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From mext-bounces@ietf.org  Tue Apr 15 01:16:50 2008
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FYI: This draft has progressed through the IESG and is about to be
approved. The latest set of changes is as follows:

Unless I hear objections in the next few days I will send out an
approval notice.

Jari

Heejin Jang wrote:
> Hi, Jari.
>
> The authors has submitted a new version of document, draft-ietf-mip6-hiopt-13.txt.
> As a result of comments from Suresh, Pasi and Alfred, there were changes as below.
>
> 1)  Dynamic discovery for dual-stacked HA was added.
> - a new reference for RFC3344 (Mobile IPv4) was added 
> - a sub-option for FQDN (Sub-opt-code 5) was extended so that the MN can know
> the provided HA is only for MIP6 or for dual-stacked.
> - IANA section was changed to indicate a Dual-stack information in the sub-option for FQDN. 
>
> 2)  Merge a previous MIP6 Relay Agent sub-option & a Home Network 
> Information sub-option to  a Common sub-option
> - delete a MIP6 Relay agent sub-option and define a common option 
>   (Section 3.1.1 and 3.2.1 were integrated into Section 3.3)
> - modification of sub-opt-code definition in the body and IANA section.
>
> 3) Etc
> - To place multiple options and in the order of preference in the Home Network 
>   Information option.
> - Reference to <draft-ietf-dime-mip6-integrated-08> in the informative refereces
> - Editorial revisions
>
> Thanks for your patience and kind help.
>
> - Best regards, 
> Heejin 

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Hi Jari, Heejin,

>   A Value of 0 in the Dual-stack field indicates
>   that the home agent specified by the following FQDN supports only
>   Mobile IPv6.  A value of 1 means that the home agent supports both
>   Mobile IPv6 and Mobile IPv4. 

I would have expected that the dual stack support means support for DSMIP6. Anyway, now that we can indicate that the HA supports MIP4, I think it would be useful to add another bit indicating support for DSMIP6?

Also the IPv4 home address/subnet option would be useful, otherwise the DSMIP6 MN on the home link would have to run IKE (or even BU/Back) to learn its IPv4 HoA.

regards
domagoj


> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Jari Arkko
> Sent: 15. travanj 2008 10:17
> To: mext@ietf.org
> Subject: [MEXT] FW: Summary for the changes in hiopt-13
> 
> FYI: This draft has progressed through the IESG and is about 
> to be approved. The latest set of changes is as follows:
> 
> Unless I hear objections in the next few days I will send out 
> an approval notice.
> 
> Jari
> 
> Heejin Jang wrote:
> > Hi, Jari.
> >
> > The authors has submitted a new version of document, 
> draft-ietf-mip6-hiopt-13.txt.
> > As a result of comments from Suresh, Pasi and Alfred, there 
> were changes as below.
> >
> > 1)  Dynamic discovery for dual-stacked HA was added.
> > - a new reference for RFC3344 (Mobile IPv4) was added
> > - a sub-option for FQDN (Sub-opt-code 5) was extended so 
> that the MN 
> > can know the provided HA is only for MIP6 or for dual-stacked.
> > - IANA section was changed to indicate a Dual-stack 
> information in the sub-option for FQDN. 
> >
> > 2)  Merge a previous MIP6 Relay Agent sub-option & a Home Network 
> > Information sub-option to  a Common sub-option
> > - delete a MIP6 Relay agent sub-option and define a common option 
> >   (Section 3.1.1 and 3.2.1 were integrated into Section 3.3)
> > - modification of sub-opt-code definition in the body and 
> IANA section.
> >
> > 3) Etc
> > - To place multiple options and in the order of preference 
> in the Home Network 
> >   Information option.
> > - Reference to <draft-ietf-dime-mip6-integrated-08> in the 
> informative 
> > refereces
> > - Editorial revisions
> >
> > Thanks for your patience and kind help.
> >
> > - Best regards,
> > Heejin
> 
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
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> I would have expected that the dual stack support means support for DSMIP6. Anyway, now that we can indicate that the HA supports MIP4, I think it would be useful to add another bit indicating support for DSMIP6?
>   

This is actually a problem in -13 (I reviewed it myself after sending
out the mail this morning).

I think we need to be able to indicate (a) FQDNs, (b) IPv6 addresses, or
(c) IPv4 addresses. DNS is quite capable of resolving an FQDN to either
IPv4 or IPv6 addresses or both... no flags needed.

And I think this draft should only focus on Mobile IPv6. We get the
Mobile IPv6 home agent's addresses (be it v4 or v6), not something else...

Jari

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On 15/04/2008, at 9:16 PM, Jari Arkko wrote:
>
>> I would have expected that the dual stack support means support for  
>> DSMIP6. Anyway, now that we can indicate that the HA supports MIP4,  
>> I think it would be useful to add another bit indicating support  
>> for DSMIP6?
>>
>
> This is actually a problem in -13 (I reviewed it myself after sending
> out the mail this morning).
>
> I think we need to be able to indicate (a) FQDNs, (b) IPv6  
> addresses, or
> (c) IPv4 addresses. DNS is quite capable of resolving an FQDN to  
> either
> IPv4 or IPv6 addresses or both... no flags needed.
>
> And I think this draft should only focus on Mobile IPv6. We get the
> Mobile IPv6 home agent's addresses (be it v4 or v6), not something  
> else...

=> Agreed.

Hesham

>
>
> Jari
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

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From: "Mona Waddell" <LeighappropriateSilver@fedex.com>
Subject: Highly secure 256bit order processing

In 2 Weeks You Can See Surprising Results. 
Success Is Certain.

http://buenbieat.com/



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From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Hesham Soliman" <hesham@elevatemobile.com>
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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I am a bit confused with the discussion about MIPv4. This draft is
only about MIPv6 is it not?
In which case support for DualStack-MIPv6 (DSMIPv6) is indicated
indirectly by either the FQDN returning A as well as AAAA records for
the HA, or by the fact that an IPv4 address netowork parameter is
included in the DHCP message. For this reason no flags are needed.

Is the above correct?

George

On Tue, Apr 15, 2008 at 12:24 PM, Hesham Soliman
<hesham@elevatemobile.com> wrote:
>
>  On 15/04/2008, at 9:16 PM, Jari Arkko wrote:
>  >
>  >> I would have expected that the dual stack support means support for
>  >> DSMIP6. Anyway, now that we can indicate that the HA supports MIP4,
>  >> I think it would be useful to add another bit indicating support
>  >> for DSMIP6?
>  >>
>  >
>  > This is actually a problem in -13 (I reviewed it myself after sending
>  > out the mail this morning).
>  >
>  > I think we need to be able to indicate (a) FQDNs, (b) IPv6
>  > addresses, or
>  > (c) IPv4 addresses. DNS is quite capable of resolving an FQDN to
>  > either
>  > IPv4 or IPv6 addresses or both... no flags needed.
>  >
>  > And I think this draft should only focus on Mobile IPv6. We get the
>  > Mobile IPv6 home agent's addresses (be it v4 or v6), not something
>  > else...
>
>  => Agreed.
>
>  Hesham
>
>
>
>  >
>  >
>  > Jari
>  >
>  > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
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George Tsirtsis kirjoitti:
> I am a bit confused with the discussion about MIPv4. This draft is
> only about MIPv6 is it not?
>   

MIPv6 only.

> In which case support for DualStack-MIPv6 (DSMIPv6) is indicated
> indirectly by either the FQDN returning A as well as AAAA records for
> the HA, or by the fact that an IPv4 address netowork parameter is
> included in the DHCP message. For this reason no flags are needed.
>
> Is the above correct?
>   

Yes.

I've asked for a new draft revision to fix this...

Jari

> George
>
> On Tue, Apr 15, 2008 at 12:24 PM, Hesham Soliman
> <hesham@elevatemobile.com> wrote:
>   
>>  On 15/04/2008, at 9:16 PM, Jari Arkko wrote:
>>  >
>>  >> I would have expected that the dual stack support means support for
>>  >> DSMIP6. Anyway, now that we can indicate that the HA supports MIP4,
>>  >> I think it would be useful to add another bit indicating support
>>  >> for DSMIP6?
>>  >>
>>  >
>>  > This is actually a problem in -13 (I reviewed it myself after sending
>>  > out the mail this morning).
>>  >
>>  > I think we need to be able to indicate (a) FQDNs, (b) IPv6
>>  > addresses, or
>>  > (c) IPv4 addresses. DNS is quite capable of resolving an FQDN to
>>  > either
>>  > IPv4 or IPv6 addresses or both... no flags needed.
>>  >
>>  > And I think this draft should only focus on Mobile IPv6. We get the
>>  > Mobile IPv6 home agent's addresses (be it v4 or v6), not something
>>  > else...
>>
>>  => Agreed.
>>
>>  Hesham
>>
>>
>>
>>  >
>>  >
>>  > Jari
>>  >
>>  > _______________________________________________
>>  > MEXT mailing list
>>  > MEXT@ietf.org
>>  > https://www.ietf.org/mailman/listinfo/mext
>>
>>  _______________________________________________
>>  MEXT mailing list
>>  MEXT@ietf.org
>>  https://www.ietf.org/mailman/listinfo/mext
>>
>>     
>
>
>   

_______________________________________________
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From mext-bounces@ietf.org  Tue Apr 15 06:33:43 2008
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From: marcelo bagnulo <marcelo@it.uc3m.es>
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Subject: Re: [MEXT] Changes in the CNs (was Re: A Proposed
	Solutionfor	AeronauticalRO
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Hi Thierry,

I think we have a small difference on the level of the requirement.

I understood from comments of the aero community that in some cases it =

would simply be impossible to update the CNs (while there would some =

cases where it would be possible to do that)

So, afaiu, the requirement was that a solution for being suitable for =

the aero community must be possible to run it in a proxy for the CN, so, =

that unchanged CNs are supported.

This is not a nice to have feature to compare two solutions, but that a =

solution that doesn't have this is simply a non starter.

But i may have misunderstood what people expressed (BTW this is what i =

recall from the madrid interim, no disucssion on this particular itme in =

philly)

Regards, marcelo


Thierry Ernst escribi=F3:
>
> Please let me jump in this discussion. I didn't attend last IETF =

> meetings and didn't follow all the discussion, but to me, what we =

> stand on is:
>
> 1. There is a trade-off between unchanged CNs and NEMO Basic Support =

> (RFC 3963): NEMO Basic Support has been designed so that CNs (and =

> MNNs, etc) are left unchanged so that even though the solution is not =

> optimal there is always a possibility to deal with legacy CNs. So, it =

> is acceptable to request changes for a RO solution (which MUST NOT =

> prevent the use of NEMO Basic Support)
>
> 2. We have always said that while leaving CNs unchanged is =

> recommended, it is acceptable to require extended features on the CNs =

> to perform RO
>
> 3. If there are 2 solutions of an acceptable quality and one of these =

> is  keeping the CNs unchanged, that one should be selected.
>
> Regards,
> Thierry.
>
> marcelo bagnulo wrote:
>>> I'm not against "big" changes in controlled environments as the
>>> aerospace one, but I just  want to know whether those changes could be
>>> made or not.
>>>
>>>   =

>>  From what i understand, the question on whether updating CNs in the =

>> ATS domain to support nemo RO was explicitly asked several times and =

>> the question in all cases was:
>> - it may be possible sometimes, but any accetable solution MUST be =

>> able to work with unchanged (legacy IPv6) CNs and offloading the nemo =

>> RO processing to a proxy box topologically near.
>>
>> Wes, is my understanding correct? has this been expressed in the =

>> requirements document? would it be in the next version? I think that =

>> it is important to nail these requirements down, including all the =

>> relevant informaiton there (in particular with respect to this issue =

>> which seems very imporntat), cause, if not people working in =

>> solutions are not able to design properly
>>
>> Regards, marcelo
>>
>>
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>   =


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From mext-bounces@ietf.org  Tue Apr 15 07:09:15 2008
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Subject: [MEXT] changes in the CNs
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Hi,

People have pointed out ot me offline what are the constraints expressed 
during the interim meeting by the aero people.

The limitation is not related with software update for the CNs, but with 
establishing trust with all of them.

This is already covered by the current draft, which states:

   It is also reasonable to assume trust relationshiops between each MR
   and a number of mobility anchor points topologically near to its CNs
   (these anchor points may be owned by the service providers), but it
   is not reasonable to assume that trust relationships can be
   established between an MR and any given CN itself.

So, at this point, i think that the requirements w.r.t. the changes in the CNs is as Thierry nicely 
expressed in his email, but there is the other constrain, which is the one i have pointed out above.

Regards, marcelo




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From: Behcet Sarikaya <behcetsarikaya@yahoo.com>
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Subject: Re: [MEXT] Result of consensus call on Home Link Detection
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If this (MIP6 operation over SDO links) is the only issue overlooked by the previous work of RFC 3775 and the bootstrapping docs, I am OK with it. 
However, I am not sure.

Regards,

Behcet
----- Original Message ----
From: Julien Laganier <julien.IETF@laposte.net>
To: mext@ietf.org
Sent: Monday, April 14, 2008 2:46:37 AM
Subject: [MEXT] Result of consensus call on Home Link Detection

Folks,

There's a clear consensus that we need to document how link link 
detection is done when one of the bootstrapping techniques is used. 
There's also a consensus that it is useful to document in an
INFORMATIONAL document the above

Raj has however suggested that we'd better to do this as part of 
RFC3775bis. 

I tend to agree with him for the following reasons:

 - what's missing to document home link detection has really a small 
footprint (i.e. 4 or 5 bullets listing the steps of home link detection 
that we discussed on the mailing list and which are in Suresh and 
George's draft) and does not represent a new feature but only a 
clarification since we're talking about publishing it as informational, 
thus it fits in RFC3775bis

 - it would be good anyway to reference the bootstrapping work in 
rfc3775bis,

 - from a documentation point of view, it is better to document that in 
one doc rather that two since the implementors doesn't have to run 
after too many RFCs.

Thus I'd like to propose that we integrate text in George and Suresh's 
draft in RFC3775bis. Would the WG agree with that way forward?

Thanks.

--julien
 
> There's also a consensus that it is useful to document in an
> INFORMATIONAL document the above since it seems it is not that obvious
> to anyone by reading RFC5026.
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<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:14pt"><div style="font-family: times new roman,new york,times,serif; font-size: 14pt;">If this (MIP6 operation over SDO links) is the only issue overlooked by the previous work of RFC 3775 and the bootstrapping docs, I am OK with it. <br>However, I am not sure.<br><br>Regards,<br><br>Behcet<br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- Original Message ----<br>From: Julien Laganier &lt;julien.IETF@laposte.net&gt;<br>To: mext@ietf.org<br>Sent: Monday, April 14, 2008 2:46:37 AM<br>Subject: [MEXT] Result of consensus call on Home Link Detection<br><br>Folks,<br><br>There's 
a 
clear 
consensus 
that 
we 
need 
to 
document 
how 
link 
link <br>detection 
is 
done 
when 
one 
of 
the 
bootstrapping 
techniques 
is 
used. <br>There's 
also 
a 
consensus 
that 
it 
is 
useful 
to 
document 
in 
an<br>INFORMATIONAL 
document 
the 
above<br><br>Raj 
has 
however 
suggested 
that 
we'd 
better 
to 
do 
this 
as 
part 
of <br>RFC3775bis. <br><br>I 
tend 
to 
agree 
with 
him 
for 
the 
following 
reasons:<br><br> 
- 
what's 
missing 
to 
document 
home 
link 
detection 
has 
really 
a 
small <br>footprint 
(i.e. 
4 
or 
5 
bullets 
listing 
the 
steps 
of 
home 
link 
detection <br>that 
we 
discussed 
on 
the 
mailing 
list 
and 
which 
are 
in 
Suresh 
and <br>George's 
draft) 
and 
does 
not 
represent 
a 
new 
feature 
but 
only 
a <br>clarification 
since 
we're 
talking 
about 
publishing 
it 
as 
informational, <br>thus 
it 
fits 
in 
RFC3775bis<br><br> 
- 
it 
would 
be 
good 
anyway 
to 
reference 
the 
bootstrapping 
work 
in <br>rfc3775bis,<br><br> 
- 
from 
a 
documentation 
point 
of 
view, 
it 
is 
better 
to 
document 
that 
in <br>one 
doc 
rather 
that 
two 
since 
the 
implementors 
doesn't 
have 
to 
run <br>after 
too 
many 
RFCs.<br><br>Thus 
I'd 
like 
to 
propose 
that 
we 
integrate 
text 
in 
George 
and 
Suresh's <br>draft 
in 
RFC3775bis. 
Would 
the 
WG 
agree 
with 
that 
way 
forward?<br><br>Thanks.<br><br>--julien<br> <br>&gt; 
There's 
also 
a 
consensus 
that 
it 
is 
useful 
to 
document 
in 
an<br>&gt; 
INFORMATIONAL 
document 
the 
above 
since 
it 
seems 
it 
is 
not 
that 
obvious<br>&gt; 
to 
anyone 
by 
reading 
RFC5026.<br>_______________________________________________<br>MEXT 
mailing 
list<br><a ymailto="mailto:MEXT@ietf.org" href="mailto:MEXT@ietf.org">MEXT@ietf.org</a><br><a href="https://www.ietf.org/mailman/listinfo/mext" target="_blank">https://www.ietf.org/mailman/listinfo/mext</a><br></div><br></div></div></body></html>
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_______________________________________________
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MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext

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Date: Tue, 15 Apr 2008 23:21:48 +0800
From: "Hui Deng" <denghui02@gmail.com>
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Sorry for my late reply, I will reply Vijay's comment in the other email,

for Ryuji's reply:
>1) Section 8.3.2, for tunneled IPsec traffic from the HA to MN, Since
RFC 4306 do require check based on the destination address. In that
case, MCOA may be able to use only 1 CoA for this direction packet
delivery. If this is true, MCOA could support multiple interfaces for
MN to HA direction, but could support only 1 HA to MN connection.
Would be better if it could be described more clearly.
Ryuji>Why?? The destination address will be home address, no?
Hui> Here we talked about packet other than BU/BA message, so CoA is involved.
Even for BU/BA, normally, IKE SA need be refreshed every regular time,
so it is also
related to which CoA is going to be used.

>2) Section 8.3.2, for tunneled IPsec traffic from the MN to HA, >From
reading, it seems fine without source address checking. But I am not
sure whethere there is already implementation which could verify it is
workable or not.
The implementation must be updated...
Hui> OK

>3) about which interface MIP6 will use in MCOA scenario, it is mainly
about how to operate SPD, but this document may lack basic description
about it.
Do you want the detail description (example) of SPD?
Hui> Here need further clarification more than description of SPD.

>4) As the basic RFC 3775, RFC 4877 lacks interface between MIP6 and
IKEv2 this document may also need consider it.
right. this is universal issue:-)
Hui> thanks, This is PF-KEY should be gather eyeball asap, other than
leave it empty but move lots of work forward,

Regards,

-Hui


2008/4/15 Ryuji Wakikawa <ryuji.wakikawa@gmail.com>:
>
> Hello all,
>
> I revised the draft according to the discussions
> at the last IETF meeting.
> I haven't submitted this to the IETF, please
> fetch the document from
>
> http://www.sfc.wide.ad.jp/~ryuji/draft-ietf-monami6-multiplecoa-07.txt
>
> The diff from the previous draft is also available at
> http://www.sfc.wide.ad.jp/~ryuji/mcoadiff.html
>
> Please take a look and provide your comments.
>
> thanks,
> ryuji
>
>
>
>
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>
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From: "Hui Deng" <denghui02@gmail.com>
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Here is my reply to Vijay's comments,

 >1) Section 8.3.2, for tunneled IPsec traffic from the HA to MN,
Since RFC 4306 do require check based on the destination address. In
that case, MCOA may be able to use only 1 CoA for this direction
packet delivery. If this is true, MCOA could support multiple
interfaces for MN to HA direction, but could support only 1 HA to MN
connection. Would be better if it could be described more clearly.
Ryuji> Why?? The destination address will be home address, no?

Vijay> You have think about the sequence of operations in more detail.
One possible sequence is explained below.

- The HA receives packets for the MN's home address
- The HA determines which binding to use for the particular flow.
 The binding will determine what CoA to use.
- Then the packets hit the SPD. If the filters match, IPsec tunnel
 encryption will be applied. You should be careful not to put the
 CoA in the SPD. SPD lookup will be based on the home address.
Hui> As I replied to Ryuji's email, CoA does exist in the SPD

 >2) Section 8.3.2, for tunneled IPsec traffic from the MN to HA,
>From reading, it seems fine without source address checking. But I am
not sure whethere there is already implementation which could verify
it is workable or not.
The implementation must be updated...
 >3) about which interface MIP6 will use in MCOA scenario, it is
mainly about how to operate SPD, but this document may lack basic
description about it.
Do you want the detail description (example) of SPD?
Vijay>SPD does not have the CoA information. So I ma not sure what we
can explain better.
Hui> Same as above,

Thanks

-Hui

2008/4/15 Ryuji Wakikawa <ryuji.wakikawa@gmail.com>:
>
> Hello all,
>
> I revised the draft according to the discussions
> at the last IETF meeting.
> I haven't submitted this to the IETF, please
> fetch the document from
>
> http://www.sfc.wide.ad.jp/~ryuji/draft-ietf-monami6-multiplecoa-07.txt
>
> The diff from the previous draft is also available at
> http://www.sfc.wide.ad.jp/~ryuji/mcoadiff.html
>
> Please take a look and provide your comments.
>
> thanks,
> ryuji
>
>
>
>
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>
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From: Tony Whyman <tony.whyman@mccallumwhyman.com>
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Subject: Re: [MEXT] changes in the CNs
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Marcelo,

Seems an odd assumption to me. The one thing that you can usually assume 
in ATC is that there is a trust relationship between an aircraft (MR) 
and the ATC Centre (CN).

Regards

Tony

marcelo bagnulo wrote:
> Hi,
>
> People have pointed out ot me offline what are the constraints 
> expressed during the interim meeting by the aero people.
>
> The limitation is not related with software update for the CNs, but 
> with establishing trust with all of them.
>
> This is already covered by the current draft, which states:
>
>   It is also reasonable to assume trust relationshiops between each MR
>   and a number of mobility anchor points topologically near to its CNs
>   (these anchor points may be owned by the service providers), but it
>   is not reasonable to assume that trust relationships can be
>   established between an MR and any given CN itself.
>
> So, at this point, i think that the requirements w.r.t. the changes in 
> the CNs is as Thierry nicely expressed in his email, but there is the 
> other constrain, which is the one i have pointed out above.
>
> Regards, marcelo
>
>
>
>
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From mext-bounces@ietf.org  Tue Apr 15 09:27:56 2008
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From: marcelo bagnulo <marcelo@it.uc3m.es>
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Subject: Re: [MEXT] changes in the CNs
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FWIW, i am just repeating what people have expressed in the meeting.

below...

Tony Whyman escribi=F3:
> Marcelo,
>
> Seems an odd assumption to me. The one thing that you can usually =

> assume in ATC is that there is a trust relationship between an =

> aircraft (MR) and the ATC Centre (CN).
>
right, there is trust between the MR and the ATC center, but not with =

every CN within the network, since it seemed that the provision of trust =

(like provisioning of certificates) would be hard for every CN. It is =

acceptable though t provision a certificate for a single node within a =

given network that acts like a proxy for the CNs topologically close, =

makes sense?

regards, marcelo



> Regards
>
> Tony
>
> marcelo bagnulo wrote:
>> Hi,
>>
>> People have pointed out ot me offline what are the constraints =

>> expressed during the interim meeting by the aero people.
>>
>> The limitation is not related with software update for the CNs, but =

>> with establishing trust with all of them.
>>
>> This is already covered by the current draft, which states:
>>
>>   It is also reasonable to assume trust relationshiops between each MR
>>   and a number of mobility anchor points topologically near to its CNs
>>   (these anchor points may be owned by the service providers), but it
>>   is not reasonable to assume that trust relationships can be
>>   established between an MR and any given CN itself.
>>
>> So, at this point, i think that the requirements w.r.t. the changes =

>> in the CNs is as Thierry nicely expressed in his email, but there is =

>> the other constrain, which is the one i have pointed out above.
>>
>> Regards, marcelo
>>
>>
>>
>>
>


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From: "Eddy, Wesley M. (GRC-RCN0)[VZ]" <wesley.m.eddy@nasa.gov>
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>-----Original Message-----
>From: marcelo bagnulo [mailto:marcelo@it.uc3m.es] =

>Sent: Tuesday, April 15, 2008 12:28 PM
>
>FWIW, i am just repeating what people have expressed in the meeting.
>
>below...
>
>Tony Whyman escribi=F3:
>> Marcelo,
>>
>> Seems an odd assumption to me. The one thing that you can usually =

>> assume in ATC is that there is a trust relationship between an =

>> aircraft (MR) and the ATC Centre (CN).


I think the consensus was that in the long-term, what Tony says will
be the case, but in the nearer-term (next several years), the PKI
will not yet be deployed and it is unclear how long it will take to
get it rolled out globally to all ANSPs and equipment.

This is a parallel/supporting effort whose website and minutes may be
of interest:
https://www.jcg.aero/index.php
Hugh Mote, who has been participating in MEXT meetings is active there.
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From: "Templin, Fred L" <Fred.L.Templin@boeing.com>
To: "Eddy, Wesley M. (GRC-RCN0)[VZ]" <wesley.m.eddy@nasa.gov>,
	"marcelo bagnulo" <marcelo@it.uc3m.es>,
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Wesley, 

>I think the consensus was that in the long-term, what Tony says will
>be the case, but in the nearer-term (next several years), the PKI
>will not yet be deployed and it is unclear how long it will take to
>get it rolled out globally to all ANSPs and equipment.

I don't have much knowledge in this space, but I am wondering
about the PKI. Would it be feasible to deploy pre-placed keys
even before a PKI becomes generally available?

Thanks - Fred
fred.l.templin@boeing.com
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Subject: Re: [MEXT] changes in the CNs
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Wesley,

Thanks for clarifying that.

The moto of the ATC Business is "if it ain't broke don't fix it" and I =

would expect any deployment of ATN-IP to respect this and follow the =

same roll out pattern as ATN-OSI - after all if it worked once...

That model started with years of prototypes and trials, followed by a =

deployment programme that recruited a core set of pioneer airlines in =

Europe around a single ATC Centre, in order to help prove the system and =

give the vendors a chance to develop stable products. Only now has the =

full roll out programme begun, backed by a mandate that will apply to =

all aircraft flying above FL280. Start to finish was around 16 years.

Expect the same to happen with an ATN-IP. There will be several years of =

trials and prototypes before some pioneer airlines start to use it. Only =

once the system is proven and demonstrated to be at least as safe as the =

current system, would full roll out begin. Hopefully the experience =

gained first time around would be used to speed the process up - but how =

much is another matter.

During the trials and prototypes phase only a local PKI is required and =

expect it to be refined several times during the learning process. Even =

during the pioneer phase, only a local PKI would be required, but its =

implementation should anticipate the later roll out to first regional =

use and then global.

So, you can see why I have a relaxed view about PKI deployment.

Regards

Tony



Eddy, Wesley M. (GRC-RCN0)[VZ] wrote:
>> -----Original Message-----
>> From: marcelo bagnulo [mailto:marcelo@it.uc3m.es] =

>> Sent: Tuesday, April 15, 2008 12:28 PM
>>
>> FWIW, i am just repeating what people have expressed in the meeting.
>>
>> below...
>>
>> Tony Whyman escribi=F3:
>>     =

>>> Marcelo,
>>>
>>> Seems an odd assumption to me. The one thing that you can usually =

>>> assume in ATC is that there is a trust relationship between an =

>>> aircraft (MR) and the ATC Centre (CN).
>>>       =

>
>
> I think the consensus was that in the long-term, what Tony says will
> be the case, but in the nearer-term (next several years), the PKI
> will not yet be deployed and it is unclear how long it will take to
> get it rolled out globally to all ANSPs and equipment.
>
> This is a parallel/supporting effort whose website and minutes may be
> of interest:
> https://www.jcg.aero/index.php
> Hugh Mote, who has been participating in MEXT meetings is active there.
>   =

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From: Heejin Jang <heejin.jang@samsung.com>
To: Jari Arkko <jari.arkko@piuha.net>
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Hi, Jari.
Please see below.

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: Tuesday, April 15, 2008 8:16 PM
> To: Premec, Domagoj
> Cc: heejin.jang@samsung.com; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> 
> > I would have expected that the dual stack support means 
> support for DSMIP6. Anyway, now that we can indicate that the 
> HA supports MIP4, I think it would be useful to add another 
> bit indicating support for DSMIP6?
> >   
> 
> This is actually a problem in -13 (I reviewed it myself after 
> sending out the mail this morning).
> 
> I think we need to be able to indicate (a) FQDNs, (b) IPv6 
> addresses, or
> (c) IPv4 addresses. DNS is quite capable of resolving an FQDN 
> to either
> IPv4 or IPv6 addresses or both... no flags needed.

Ok.  for FQDN sub-opt-code, I'll fallback to the previous version. (v12).
 
> And I think this draft should only focus on Mobile IPv6. We 
> get the Mobile IPv6 home agent's addresses (be it v4 or v6), 
> not something else...

" focus on Mobile IPv6..not something else..." means there is no need to 
add what Premec suggested, that is IPv4 HoA, IPv4 subnet?

For clarity, then I'll revise as below. (Your previous mail was also considered.)

OLD: 
       Sub-opt-code

               0    Reserved
               1    Home network identifier (only admitted
                     in a Home Network Information option)
               2    IPv6 home network prefix
               3    IPv6 home agent address
               4    IPv4 address of the dual-stacked home agent
               5    Home agent FQDN
               6 .. (2^16-1) Reserved
NEW:
               0    Reserved
               1    Home network identifier (only admitted
                     in a Home Network Information option)
               2    IPv6 home network prefix
               3    IPv6 home agent address
               4    Home agent FQDN
               5 .. (2^16-1) Reserved

/* Node that the below is for IPv6 address sub-opt-code, not for FQDN sub-opt-code*/

When the Sub-opt-code is set to 3, the Home Network Parameter field
MUST consist of a Flags octet followed by the 128-bit IPv6 address 
of the home agent.  The most significant bit of the Flags octet encodes 
a DSMIP field, and the seven remaining bits are Reserved (must be set to 0 and
ignored on receipt).  A Value of 1 in the DSMIP field indicates that 
the home agent specified by the following IPv6 address has an IPv4 address 
and has a capability to support DSMIPv6 [DSMIPv6]. A value of 0 means that
the home agent only supports Mobile IPv6. 

Kindly let me know my understanding is right or not.

- Best regards, 
Heejin
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Heejin,

>> This is actually a problem in -13 (I reviewed it myself after 
>> sending out the mail this morning).
>>
>> I think we need to be able to indicate (a) FQDNs, (b) IPv6 
>> addresses, or
>> (c) IPv4 addresses. DNS is quite capable of resolving an FQDN 
>> to either
>> IPv4 or IPv6 addresses or both... no flags needed.
>>     
>
> Ok.  for FQDN sub-opt-code, I'll fallback to the previous version. (v12).
>  
>   
>> And I think this draft should only focus on Mobile IPv6. We 
>> get the Mobile IPv6 home agent's addresses (be it v4 or v6), 
>> not something else...
>>     
>
> " focus on Mobile IPv6..not something else..." means there is no need to 
> add what Premec suggested, that is IPv4 HoA, IPv4 subnet?
>   

The IPv6 network prefix is there presumably because we want to enable
the use of the HA anycast address. There is nothing corresponding in
IPv4, so we don't need a prefix. And this draft does not give us IPv6
home addresses, so there is no need for IPv4 home addresses either.

> For clarity, then I'll revise as below. (Your previous mail was also considered.)
>
> OLD: 
>        Sub-opt-code
>
>                0    Reserved
>                1    Home network identifier (only admitted
>                      in a Home Network Information option)
>                2    IPv6 home network prefix
>                3    IPv6 home agent address
>                4    IPv4 address of the dual-stacked home agent
>                5    Home agent FQDN
>                6 .. (2^16-1) Reserved
> NEW:
>                0    Reserved
>                1    Home network identifier (only admitted
>                      in a Home Network Information option)
>                2    IPv6 home network prefix
>                3    IPv6 home agent address
>                4    Home agent FQDN
>                5 .. (2^16-1) Reserved
>   

No, this is wrong. You *do* need to have IPv4 address of the Mobile IPv6
home agent as well. Don't change this part, just change the parts where
you talked about Mobile IPv4... these options will give you access to
the Mobile IPv6 service, be it over IPv4, IPv6 or whatever. But these
options do not give you access to Mobile IPv4 service.

> /* Node that the below is for IPv6 address sub-opt-code, not for FQDN sub-opt-code*/
>
> When the Sub-opt-code is set to 3, the Home Network Parameter field
> MUST consist of a Flags octet followed by the 128-bit IPv6 address 
> of the home agent.  The most significant bit of the Flags octet encodes 
> a DSMIP field, and the seven remaining bits are Reserved (must be set to 0 and
> ignored on receipt).  A Value of 1 in the DSMIP field indicates that 
> the home agent specified by the following IPv6 address has an IPv4 address 
> and has a capability to support DSMIPv6 [DSMIPv6]. A value of 0 means that
> the home agent only supports Mobile IPv6. 
>   

I don't see a need for this. You will deliver one or several of: IPv4
address, IPv6 address, IPv6 prefix, FQDN. Depending on what you get and
how the FQDN is resolved, you will either have or not have IPv4
addresses in your final set. If you do, that means that server should be
contactable by IPv4 using DSMIP. No flag needed.

Jari

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From: Ryuji Wakikawa <ryuji.wakikawa@gmail.com>
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Hello George,

Thanks for comments!

It looks like your comments are more editorial one.
Can I assume you mostly agree on the changes?
I will revise the document quickly and post it again to MEXT.


On 2008/04/15, at 21:29, George Tsirtsis wrote:
> Hi Ryuji,
>
> This looks really good.
> I have a number of detailed comments which should be easy to resolve,
>
> 1) You may want to use the IPv6 prefix (2001:DB8::/32) reserved for
> documentation (see RFC3849)

I will update the doc. I wasn't aware of this reserved prefix:)

> 2) I am suggesting that when the H flag is set in the BU, it should be
> viewed as a registration, rather than de-registration.

OK. But I have some comments on this.
Please find my comments inline below.

> More comments inline...
>
> Thanks
> George
> --------------------------------------------------------------------------------------------
>
> 3.  Protocol Overview
> $B!D(B
>   1.  The mobile node uses only the interface with which it attaches  
> to
>       the home link illustrated in Figure 2.  It de-registers all
>       bindings related to all care-of addresses to the home agent.   
> The
>       interfaces still attached to the visited link(s) are no longer
>       going to be receiving any encapsulated traffic from the home
>       agent.  On the other hand, the mobile node can continue
>       communicating with the correspondent node from the other
>       interfaces attached to foreign links by using route  
> optimization.
>       Even if the mobile node is attached to the home link, it can
>       still send Binding Updates for other active care-of addresses
>       (CoA2 and CoA3) to correspondent nodes.  Since the correspondent
>       node has bindings, packets are routed to each Care-of Addresses
>       directly.
>
>                    +----+
>                    | CN |
>                    +--+-+
>                       |
>                   +---+------+          +----+
>            +------+ Internet |----------+ HA |
>            |      +--------+-+          +--+-+
>        CoA2|               |               |   Home Link
>         +--+--+            |         --+---+------
>         |  MN +========+   |           |
>         +--+--+        |   |           |
>        CoA3|           +---|-----------+
>            +---------------+
>
>     Binding Cache Database:
>        home agent's binding
>              none
>        correspondent node's binding
>              binding [a:b:c:d::EUI  care-of address2  BID2]
>              binding [a:b:c:d::EUI  care-of address3  BID3]
>
>             Figure 2: Using only Interface Attached to Home Link
>
>
> GT> Why is this figure different than the others below? Is the home
> link crossing over the CoA3 link, necessary? The figure could be shown
> as the once below no?

No necessary...
These figures were located at the appendix in the previous version and  
just be reused.
I will update the figure.

> $B!D(B
>   3.  The mobile node may simultaneously use both the interface
>       attached to the home link and the interfaces still attached to
>       the visited link(s) as shown in Figure 4.  There are two  
> possible
>       topologies whether the home agent is single router at the home
>       link or not.  The operation of Neighbor Discovery [RFC-2461] is
>       different in the two topologies.  The home agent and the
>       correspondent node have the binding entries listed in Figure 4  
> in
>       their binding cache database in both topologies.  The home agent
>       also knows that the mobile node has attached to the home link.
>       All the traffic from the Internet are intercepted by the home
>
> GT> //are/is
>
>       agent first and routed to either the interface attached to the
>       home link or the one attached to the foreign links.  How to make
>
> GT> // the one attached to the foreign links./to one of the foreign  
> links.
>
>       the decision is out of scope in this document.
>
>
>
>
>
>
>
>
>
>
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 10]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>   Topology-a)
>                    +----+
>                    | CN |
>                    +--+-+
>                       |
>                   +---+------+          +----+
>            +------+ Internet |----------+ HA |
>            |      +----+-----+          +--+-+
>        CoA2|           |                   |   Home Link
>         +--+--+        |             --+---+------
>         |  MN +========+               |
>         +--+--+ CoA1                   |
>       CoA3 |                           |
>            +---------------------------+
>
>   Topology-b)
>                    +----+
>                    | CN |
>                    +--+-+
>                       |
>                   +---+------+    Router    +----+
>            +------+ Internet |-------R      | HA |
>            |      +----+-----+       |      +--+-+
>        CoA2|           |             |         |   Home Link
>         +--+--+        |           --+-+-------+------
>         |  MN +========+               |
>         +--+--+ CoA1                   |
>       CoA3 |                           |
>            +---------------------------+
>
>
> GT> I think the CoA3 shown in this figures should not be there, tight?
>

you are right. will fix this, too.

>     Binding Cache Database:
>        home agent's binding
>              binding [a:b:c:d::EUI  care-of address1  BID1]
>              binding [a:b:c:d::EUI  care-of address2  BID2]
>        correspondent node's binding
>              binding [a:b:c:d::EUI  care-of address1  BID1]
>              binding [a:b:c:d::EUI  care-of address2  BID2]
>
>
>            Figure 4: Simultaneous Home and Visited Link Operation
>
>
>
>
>
>
>
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 11]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
> 4.  Mobile IPv6 Extensions
>
>   This section summarizes the extensions to Mobile IPv6 necessary for
>   manage multiple bindings.
>
> 4.1.  Binding Cache Structure and Binding Update List
>
>   The BID is required to be stored in the binding cache and binding
>   update list structure.
>
>   The sequence number value SHOULD be shared among all the binding
>   update list.  Whenever a mobile node sends either individual or bulk
>   binding update, the sequence number is incremented the value of the
>   previous sequence number.
>
> GT>// is incremented the value of the previous sequence number. // is
> incremented.
>
> On the other hand, if a mobile node
>   manages an individual sequence value per binding update list, a
>   mobile node SHOULD carefully select the sequence number value for  
> the
>   bulk binding update.  This is because all the bulk-registered
>   bindings use the same Sequence Number specified in the Binding
>   Update.  If each binding uses different sequence number, a mobile
>   node MUST use the largest sequence number from the Binding Update
>   list entries used for the bulk registration.  If the mobile node
>   cannot select a sequence number for all the bindings due to sequence
>   number out of window, it MUST NOT use the bulk registration for the
>   binding whose sequence number is out of window.  A separate Binding
>   Update should be sent for the binding.
>
> 4.2.  Binding Identifier Mobility Option
>
>   The Binding Identifier mobility option is included in the Binding
>   Update, Binding Acknowledgement, Binding Refresh Request, and Care- 
> of
>   Test Init and Care-of Test message.
>
>                      1                   2                   3
>        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>                                       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
> +-+
>                                       |   Type = TBD  |      
> Length    |
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
> +-+
>       |       Binding ID (BID)        |     Status    |C|O|H|D| 
> Resrvd |
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
> +-------------------------------+
>        
> +                                                               +
>       :                 IPv4 or IPv6 care-of address  
> (CoA)            :
>        
> +                                                               +
>        
> +---------------------------------------------------------------+
>
>                       Figure 5: BID Mobility Option
>
>
>
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 12]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>   Type
>
>      Type value for Binding Identifier is TBD
>
>   Length
>
>      8-bit unsigned integer.  Length of the option, in octets,
>      excluding the Type and Length fields.  It MUST be set to 4 when
>      the 'C' flag is unset.  Otherwise, the Length value MUST be set  
> to
>      either 8 or 20 depending on the 'D' (DSMIPv6) flag.
>
>   Binding ID (BID)
>
>      The BID which is assigned to the binding indicated by the care-of
>      address in the Binding Update or the BID mobility option.  The  
> BID
>      is a 16-bit unsigned integer.  The value of zero is reserved and
>      MUST NOT be used.
>
>   Status
>
>      When the Binding Identifier mobility option is included in a
>      Binding Acknowledgement, this field overwrites the status field  
> in
>      the Binding Acknowledgement.  If this field is zero, the receiver
>      MUST use the registration status stored in the Binding
>      Acknowledgement message.  This Status field is also used to carry
>      error information related to the care-of address test in the
>      Care-of Test message.  The status is 8-bit unsigned integer.  The
>      possible status codes are the same as the status codes of Binding
>      Acknowledgement.
>
>   Care-of address (C) flag
>
>      When this flag is set, it indicates that a valid care-of address
>      is present in the care-of address field in the BID mobility
>      option.  This flag MUST be set whenever the mobile node sends
>      multiple care-of addresses in a single Binding Update, i.e., bulk
>      registration.  It MAY also used as a substitute for alternate
>
> GT> //It MAY also used/It MAY also be used
>
>      care-of address option even for Binding Updates that are sent  
> only
>      for one care-of address.  This flag is valid only for Binding
>      Update sent to the home agent.
>
>   Overwrite (O) flag
>
>      When this flag is set, a mobile node requests the recipient to
>      replace all the bindings to binding entries stored in a Binding
>      Update.
>
>
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 13]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>   Simultaneous Home and Foreign Binding (H) flag
>
>      This flag indicates that the mobile node registers multiple
>      bindings to the home agent while is attached to the home link.
>      This flag is valid only for a Binding Update sent to the home
>      agent.
>
>   DSMIPv6 (D) flag
>
>      This flag indicates that the care-of address is an IPv4 address.
>      When this flag is set, the care-of address field MUST contain an
>      IPv4 address.
>
>
> GT> I can not remember if this was ever discussed but do we really
> need flags C and D? It seems to me that the Length field can be 4 (CoA
> not included), 12 (v4CoA), or 20 (v6CoA), which provides all the info
> we need.

Good point. The receiver can tell which address is stored in the option.

>
>
>   Reserved
>
>      5 bits Reserved field.  The reserved field MUST be zero.
>
>   Care-of Address
>
>      This field has the variable length depending on the specified
>      flags.  When the 'C' flag is set and the 'D' flag is not, an IPv6
>      care-of address for the corresponding BID is stored in this  
> field.
>      If both 'C' and 'D' flags are set, an IPv4 Care-of Address is
>      carried in this field.  This field MUST NOT be used if a Binding
>      Identifier mobility option is included in any other message other
>      than a Binding Update or if the 'C' flag is not set.
>
> $B!D(B
> 4.4.  Link Layer Address Mobility Option
>
>   The Link Layer Address mobility option is included only in the
>   deregistration Binding Update when a mobile node returns home with
>   simultaneous home and foreign attachment support described in
>   Section 5.6.3.  This option contains the link-layer address of the
>   sender of the Binding Update (i.e. a mobile node).  This option MUST
>   be silently ignored for other mobility header messages.
>
> GT> I think the term ?silently? is used in the context of dropping a
> packet/message i.e., ?silently discard?. In this case maybe we should
> just say ?ignored?.

yes, the intention is "ignored". I will correct the expression.

>
>
>
>                      1                   2                   3
>        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>                                       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
> +-+
>                                       |   Type = TBD  |      
> Length    |
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
> +-+
>        
> +                                                               +
>       :                        Link Layer  
> address                     :
>        
> +                                                               +
>        
> +---------------------------------------------------------------+
>
>                       Figure 6: BID Mobility Option
>
>
> GT> Figure caption seems wrong. Also, has such option never been
> defined for MIPv6 before? I see that PMIPv6 draft also defined the
> same option. I would hope that only one such option is needed for all
> flavors of MIPv6?

Do you mean the interface identifier option of PMIP6?
If that interface identifier is always LL address, we will reuse that  
option.
Or we can overwrite the sub-option spec. to carry the LL address  
always for MCoA in this spec.
I will discuss this with Sri.

> $B!D(B
> 5.6.  Returning Home
>
>   The mobile node may return to the home link, by attaching to the  
> home
>   link through one of its interfaces.  When the mobile node wants to
>   return home, it should be configured with information on what
>   interface it needs to use.  The mobile node may use only the
>   interface with which it is attached to the home link, only the
>   interfaces still attached to the visited link or use both interfaces
>
> GT> // visited link/ visited link(s)
>
>   attached to the home link and visited link simultaneously.  The
>
> GT> // visited link/ visited link(s)
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 19]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>   following describes each option in more detail.
>
> 5.6.1.  Using only Interface attached to the Home Link
>
>   The mobile node returns home and de-registers all the bindings as
>   shown in Figure 2 and as defined in [RFC-3775].  De-registering all
>   the bindings is the same as binding de-registration from foreign  
> link
>
> GT> delete ?from foreign link?
>
>   described in Section 5.5.  After the de-registration step, all the
>   packets routed by the home agent are only forwarded to the interface
>   attached to the home link, even if there are other active interfaces
>   attached to the visited link.  While the mobile node de-registers  
> all
>
> GT> // visited link/ visited link(s)
>
>   the bindings from the home agent, it may continue registering
>   bindings for interface attached to visited link to the correspondent
>
> GT> //interface attached to visited link/ interface(s) attached to
> visited link(s)
>
>   node as shown in Figure 2.
>
> 5.6.2.  Using only Interface attached to the Visited Link
>
>   The mobile node returns home and shuts down the interface attached  
> to
>   the home link as shown in Figure 3.  Before shutting down the
>   interface, any binding for the care-of address previously associated
>   with the interface should be deleted. To delete the binding cache
>   entry, the mobile node SHOULD send a de-registration Binding Update
>   with the lifetime set to zero and include the corresponding BID
>   information.  If the mobile node does not send a de-registration
>   Binding Update, the binding for the care-of address previously
>   assigned to the interface remains at the home agent.
>
> GT> // at the home agent/ at the home agent until its lifetime expires
>
> This binding is
>   deleted only when it expires.  In order to avoid this, the mobile
>   node SHOULD send a de-registration binding update for the interface
>   attached to the home link.
>
> GT> I think the above can be removed (the SHOULD is repeated above and
> the rest is already explained).
>
>
>   This scenario is not the most efficient because all the traffic to
>   and from the mobile node is going through the bi-directional tunnel,
>   whereas the mobile node is now accessible at one hop on the home  
> link
>   from its home agent.
>
> GT> To avoid judgment calls maybe we can revise this to the following:
> ?   In this scenario, despite the face that the mobile node is
> connected to its home link, all of its traffic is send and received
> via the HA and its foreign links.?
>
>
>
> 5.6.3.  Simultaneous Home and Visited Link Operation
>
>
>   [Problems of Simultaneous Home and Foreign Attachments]
>
>   The mobile node returns home and continues using all the interfaces
>   attached to both foreign and home links as shown in Figure 4.  The
>   mobile node indicates this by setting the 'H' flag in the BID
>   mobility option as defined below.  There are additional requirements
>   on the Returning Home procedures for possible Neighbor Discovery
>   states conflicts at the home link.
>
>   In [RFC-3775], the home agent intercepts packets meant for the  
> mobile
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 20]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>   node using the Proxy Neighbor Discovery [RFC-2461] while the mobile
>   node is away from the home link.  When the mobile node returns home,
>   the home agent deletes the binding cache and stops proxying for the
>   home address so that a mobile node can configure its home address on
>   the interface attached to the home link.  In this specification, a
>   mobile node may return home, configure the home address on the
>   interface attached to the home link, but still use the interfaces
>   attached to the foreign links.  In this case, a possible conflict
>   arises when the both the home agent and the mobile node try to  
> defend
>   the home address.  If the home agent stops proxying for the home
>   address, the packets are always routed to the interface attached to
>   the home link and are never routed to the interfaces attached to the
>   visited links.  It is required to avoid the conflict between the  
> home
>   agent and the mobile node, while still allowing the simultaneous use
>   of home and foreign links.  The following describes the mechanism  
> for
>   achieving this.
>
>
>   [Overview and Approach]
>
>   In this specification, the home agent MUST intercept all the packets
>   meant for the mobile node and decide whether to send the traffic
>   directly to the home address on the link or tunnel to the care-of
>   address.  The home agent intercepts all the packets even when the
>   mobile node is attached to the home link through one of its
>   interfaces.  The home agent would make this decision based on the
>   type of packets and flows.  How to make this decision is out of  
> scope
>   in this document.
>
>   Even when the mobile node returns home, how can home agent intercept
>   the packets meant for the mobile node at the home link on behalf of
>   the mobile node?
>
> GT> The question above can be removed.
>
> We introduce two possible scenarios, illustrated in
>
> GT> //We introduce two possible scenarios, illustrated / Two scenarios
> are illustrated
>
>   Figure 4, depending on whether the Home Agent is a single router at
>   the home link or not.  The difference is who will defend the home
>   address by (Proxy) Neighbor Discovery on the home link.
>
>   1.  Mobile node defends the home address by the regular Neighbor
>       Discovery Protocol (illustrated as topology-a in Figure 4).  The
>       home agent is the single router to the Internet on the home  
> link.
>       Therefore the home agent is capable of intercepting packets
>       without relying on the proxy Neighbor Discovery protocol and the
>       mobile node can manage the Neighbor Cache entry of the home
>       address on the home link as a regular IPv6 node.
>
>   2.  Home agent continue intercepting the mobile node's packets using
>       proxy Neighbor Discovery even after the mobile node's returning
>       home (illustrated as topology-b in Figure 4).  The home agent
>       cannot intercept all the packets meant for the mobile node by IP
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 21]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>       routing due to multiple routers on the home link.  Due to the
>       possible competing neighbor cache state for the home address,  
> the
>       mobile node SHOULD NOT operate Neighbor Discovery protocol for
>       the home address on the home link. The problem arises when the
>       home agent perform the neighbor discovery to resolve the link-
>       layer address of the mobile node on the home link.  Since the
>       mobile node never answers to the Neighbor Discovery packets for
>       the home address, the home agent would need to know the Link-
>       Layer address of the interface with which the mobile node is
>       attached to the home link in other way.
>
>
> GT> I re-wrote the above to make it clearer:
> "The home agent cannot naturally intercept all the packets meant for
> the mobile node by IP routing due to multiple routers on the home
> link. In this case, the mobile node MUST NOT operate Neighbor
> Discovery protocol for the home address on the home link. This allows
> the home agent to keep using proxy neighbor discovery and thus it
> keeps receiving all the packets sent to the mobile node's home
> address. If the home agent, according to its local policy, needs to
> deliver packets to the mobile node over the home link, an issue arises
> with respect to how the home agent discovers the mobile node's link
> local address."
>
>
>       This specification
>       introduces a new Link-Layer Address mobility option carrying the
>       mobile node's link-layer address in the Binding Update.
>       Likewise, the mobile node would also know the link-layer address
>       of the default router address to send packets from the home link
>       without Neighbor Discovery.  The link-layer address is used to
>       transmit packets from and to the mobile node on the home link.
>       The packets are transmitted without the Neighbor Discovery
>       protocol by constructing the link-layer header manually.  This
>       operation is similar to Mobile IPv6 [RFC-3775] when a mobile  
> node
>       sends a deregistration binding update to the home agent's link-
>       layer address in returning home operation.
>
>
>
>
>
>
>   [Sending Deregistration Binding Update]
>
>
>   o  As soon as a mobile node returns home, it sends a de-registration
>      Binding Update to the home agent from the interface attached to
>      the home link.
>
> GT> I think throughout the description of this mode of operation the
> MN sends a *registration* not a *de-registration*. In fact you should
> add somewhere that "A BU with H flag set MUST have a non-zero
> Lifetime"

I think MN can use the zero lifetime and de-register the BU.
MN continues setting the H flag for BUs to other interfaces attached  
to foreign link,
because MN attached to both foreign and home link.

MN sends BU from the interface attached to the home link just once.
After that BU, MN sends BU with H flag set from the other interfaces  
while it is at home link.

MN should not send BU from the home link multiple times..
That's why we said dregistration BU here.

What do you think?

>
>   o  The mobile node MUST include the BID mobility option specifying
>      the BID the mobile node had previously associated with the
>      interface attached to the home link.  The 'H' flag MUST be set in
>      the BID mobility option.  The 'C' flag MUST NOT be set and the
>      care-of address field MUST NOT be included.  When the 'H' flag is
>      set, the home agent recognizes that the mobile node wants to
>      continue using interfaces attached to both home and visited  
> links.
>      Note that H flag MUST be set for all the binding updates sent  
> from
>      the mobile node (ex.  Binding Update for the interface attached  
> to
>      the foreign link).
>
> GT>// for the interface attached to the foreign link)./ for the
> interface(s) attached to foreign link(s)).
>
>
>
>   o  The mobile node SHOULD include the Link-Layer address mobility
>      option to notify the mobile node's link-layer address to the home
>      agent, too.  This link-layer address is required for the home
>      agent to send the Binding Acknowledgement and to forward the
>      mobile node's packet.
>
>   o  According to [RFC-3775], the mobile node MUST start responding to
>      Neighbor Solicitation for its home address right after it sends
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 22]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>      the deregistration Binding Update to the home agent.  However, in
>      this specification, the mobile node MUST NOT respond to Neighbor
>      Solicitation before receiving a Binding Acknowledgement, since  
> the
>      home agent may continue proxying for the home address.
>
> GT> the MN must not respond to NS messages before and *after*
> receiving the BA, right?

This isn't such clear.
If HA returns [MCOARETURNHOME WO/NDP], MN MUST NOT respond to NS after  
the BA.
Otherwise, MN should answer to NS.

>
>   [Sending Binding Acknowledgement]
>
>   o  When the home agent sends the Binding Acknowledgement after
>      succeeding the binding de-registration, it MUST set the status
>      value to either 0 [Binding Update Accepted] or to [MCOARETURNHOME
>      WO/NDP (TBD)] in the BID mobility option depending on home agent
>      configuration at the home link.  The new values are:
>
>      *  Binding Update Accepted (0): NDP is permitted for the home
>         address at the home link.  This is regular returning home
>         operation of [RFC-3775]
>
>      *  MCOA RETURNHOME WO/NDP (TBD): NDP is prohibited for the home
>         address at the home link
>
>      If the binding update is rejected, the appropriate error value
>      MUST be set to the status field.  In this case, the home agent
>      operation is same as [RFC-3775].
>
>   o  If the home agent is the only router at the home link, it stops
>      proxy Neighbor Discover for the requested home address and
>      responds with the [Binding Update Accepted] status value to the
>      mobile node.  Since the mobile node will not reply to Neighbor
>      Solicitation for the home address before receiving the Binding
>      Acknowledgement, the home agent SHOULD use the link-layer address
>      carried by the Link Layer Address mobility option in the received
>      Binding Update.  After the completion of the binding
>      deregistration, the mobile node starts regular Neighbor Discovery
>      operations for the home address on the home link.  The neighbor
>      cache entry for the home address is created by the regular
>      exchange of Neighbor Solicitation and Neighbor Advertisement.
>
>   o  On the other hand, if the home agent is not the only router on  
> the
>      home link, it returns [MCOA RETURNHOME WO/NDP] value in the  
> Status
>      field of the BID mobility option.  The home agent learns the
>      mobile node's link-layer address by receiving the link-layer
>      address mobility option carried by the Binding Update.  It stores
>      the link-layer address as a neighbor cache entry for the mobile
>      node so that it can send the packets to the mobile node's link-
>      layer address.
>
>
> GT> It should be clarified that even if the HA is the only router on
> the link, it might still make sense to continue Proxy-NDP as normal.
> On shared links, this is probably the easiest way of intercepting
> packets, as opposed to snooping. In any case, it is an implementation
> choice.

This is good point. We should leave the choice to implementations.

I appreciate  your detailed comments!


regards,
ryuji


>
>
>
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 23]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>   o  If BID option is missed in the Binding Acknowledgement, the home
>      agent might not recognize the simultaneous home and foreign
>      attachment.  The home agent might process the de-registration
>      Binding Update as one of [RFC-3775] and deletes all the  
> registered
>      binding cache entries for the mobile node.  Thus, the mobile node
>      SHOULD stop using the interface attached to foreign link and use
>      only the interface attached to the home link.
>
>
>   [Sending Packets from the Home Link]
>
>   o  When the mobile node receives the Binding Acknowledgement which
>      status value is [Binding Update Accepted] and BID option, it can
>      configure its home address to the interface attached to the home
>      link and start operating Neighbor Discovery for the home address
>      on the home link.  Packets can be transmitted from and to the
>      mobile node as if the mobile node is a regular IPv6 node.
>
>   o  If the mobile node receives the [MCOA RETURNHOME WO/NDP], it MUST
>      NOT operate Neighbor Discovery for the home address.  When the
>      mobile node sends packets from the interface attached to the home
>      link, it MUST learn the link-layer address of the next hop (i.e.
>      default router of the mobile node).  A mobile node learns the
>      default router's link-layer address from a Source Link-Layer
>      Address option in Router Advertisements.  The mobile node sends
>      packets directly to the default router's link-layer address.   
> This
>      is done by constructing the packet including link-layer header
>      with the learned link-layer address of the default router.  The
>      home agent also forwards the packet to the mobile node on the  
> home
>      link by using the mobile node's link-layer address.  The link-
>      layer address SHOULD be cached when the home agent received the
>      deregistration Binding Update message.
>
>
>   [Leaving from the Home Link]
>
>   o  When the mobile node detaches from the home link, it SHOULD
>      immediately send a binding update for one of active care-of
>      address with H flag unset.  When the 'H' flag of BID option is
>      unset in any Binding Update, the home agent stop forwarding the
>      mobile node's packet to the home link.
>
>   o  On the other hand, if the mobile node does not have any active
>      care-of address to send a Binding Update and leaves the home link
>      (i.e. the mobile node is completely disconnected), the home agent
>      continues forwarding packets to the mobile node until the
>      expiration of all the binding cache entries for the home address.
>      Once all the bindings are expired, the mobile node is assumed to
>
>
>
> Wakikawa (Editor), et al.  Expires October 17, 2008            [Page  
> 24]
>
> Internet-Draft                    MCoA                        April  
> 2008
>
>
>      be disconnected completely from networks.
>
>
>
>   [Changing Behavior during the attachment to the home link]
>
>   When a mobile node would change the home operation to Section 5.6.1
>   or Section 5.6.2, following procedure should be taken.
>
> GT> Remove the above sentence
>
>   If a mobile node decides to return home completely without any  
> active
>   foreign link attachment, it simply sends a deregistration binding
>   update as described in Section 5.6.1.  Once the home agent receives
>   such de-registration binding update, the home agent clears all the
>   binding and states for the mobile node.
>
>   If a mobile node would stop using the interface attached to the home
>
> GT>// If a mobile node would/ If a mobile node decides to /
>
> link, it simply sends a binding update from the one of active care-of
>   address.  In the Binding Update, the mobile node should include the
>   BID option for the care-of address and unset the H flag of BID
>   option.  The home agent clears the states of the mobile node for the
>   interface attached to the home link and stop forwarding the packets
>   to the mobile node on the home link.
>
>
>
>
> On Tue, Apr 15, 2008 at 3:55 PM, Ryuji Wakikawa
> <ryuji.wakikawa@gmail.com> wrote:
>>
>> Hello all,
>>
>> I revised the draft according to the discussions
>> at the last IETF meeting.
>> I haven't submitted this to the IETF, please
>> fetch the document from
>>
>> http://www.sfc.wide.ad.jp/~ryuji/draft-ietf-monami6- 
>> multiplecoa-07.txt
>>
>> The diff from the previous draft is also available at
>> http://www.sfc.wide.ad.jp/~ryuji/mcoadiff.html
>>
>> Please take a look and provide your comments.
>>
>> thanks,
>> ryuji
>>
>>
>>
>>
>>
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>>

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From mext-bounces@ietf.org  Wed Apr 16 01:46:44 2008
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From: marcelo bagnulo <marcelo@it.uc3m.es>
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Cc: mext <mext@ietf.org>
Subject: Re: [MEXT] changes in the CNs
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I see your point. However, it does sounds like a reasonable feature to =

ask to be able to run whatever mechanism we define in proxy mode, =

doesn't it?


Tony Whyman escribi=F3:
> Wesley,
>
> Thanks for clarifying that.
>
> The moto of the ATC Business is "if it ain't broke don't fix it" and I =

> would expect any deployment of ATN-IP to respect this and follow the =

> same roll out pattern as ATN-OSI - after all if it worked once...
>
> That model started with years of prototypes and trials, followed by a =

> deployment programme that recruited a core set of pioneer airlines in =

> Europe around a single ATC Centre, in order to help prove the system =

> and give the vendors a chance to develop stable products. Only now has =

> the full roll out programme begun, backed by a mandate that will apply =

> to all aircraft flying above FL280. Start to finish was around 16 years.
>
> Expect the same to happen with an ATN-IP. There will be several years =

> of trials and prototypes before some pioneer airlines start to use it. =

> Only once the system is proven and demonstrated to be at least as safe =

> as the current system, would full roll out begin. Hopefully the =

> experience gained first time around would be used to speed the process =

> up - but how much is another matter.
>
> During the trials and prototypes phase only a local PKI is required =

> and expect it to be refined several times during the learning process. =

> Even during the pioneer phase, only a local PKI would be required, but =

> its implementation should anticipate the later roll out to first =

> regional use and then global.
>
> So, you can see why I have a relaxed view about PKI deployment.
>
> Regards
>
> Tony
>
>
>
> Eddy, Wesley M. (GRC-RCN0)[VZ] wrote:
>>> -----Original Message-----
>>> From: marcelo bagnulo [mailto:marcelo@it.uc3m.es] Sent: Tuesday, =

>>> April 15, 2008 12:28 PM
>>>
>>> FWIW, i am just repeating what people have expressed in the meeting.
>>>
>>> below...
>>>
>>> Tony Whyman escribi=F3:
>>>    =

>>>> Marcelo,
>>>>
>>>> Seems an odd assumption to me. The one thing that you can usually =

>>>> assume in ATC is that there is a trust relationship between an =

>>>> aircraft (MR) and the ATC Centre (CN).
>>>>       =

>>
>>
>> I think the consensus was that in the long-term, what Tony says will
>> be the case, but in the nearer-term (next several years), the PKI
>> will not yet be deployed and it is unclear how long it will take to
>> get it rolled out globally to all ANSPs and equipment.
>>
>> This is a parallel/supporting effort whose website and minutes may be
>> of interest:
>> https://www.jcg.aero/index.php
>> Hugh Mote, who has been participating in MEXT meetings is active there.
>>   =

>


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Subject: [MEXT] Global PKIs ( was Re:  changes in the CNs)
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Dear all,

 From some off list discussions that have taken place, I get the feeling 
that different people focus on different issues when the term "global 
PKI" is mentioned. There is thus a need to agree on the interpretation 
of the term "global PKI".

Firstly, there is a clear need to separate out discussion on the 
technology used (certificate formats, digital signature algorithms, 
etc.) from the process of issuing certificates (politics).

In my paper and posts, I have assumed an evolutionary approach to both, 
with a single global PKI being the logical outcome of this process. On 
the other hand, I have no problem in conceding that the move from 
regional to a single global PKI may have political issues associated 
with it, in the sense that one CA may have problems recognising the 
validity and integrity of the process performed by another CA. It may 
thus be a very long evolutionary process.

My proposal is thus that the requirement for an aviation global PKI is 
interpreted as a need for a core common PKI technology supporting a 
number of regional PKIs, with a long term objective of evolving into a 
single global PKI.

My assumption here is that the main problem in establishing a regional 
PKI is technology, while joining the regions together to form a single 
global PKI is a political problem. A region is thus self-defining.

The practical implication is that an aircraft will need a certificate 
for each region in which it operates and will need to be able to 
validate certificates presented to it issued by the CAs responsible for 
those regions. Implementations will have to be able to work with 
multiple certificates and CAs. Only when CAs start issuing 
cross-certificates for each other, will the number of certificates that 
an aircraft needs, be reduced.

The issuing of the cross-certificate is where the political issue arises 
as will only be done when a given regional  CA is fully satisfied as to 
the validity and integrity of the process performed by another regional CA.

Regards

Tony Whyman



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Cc: Ryuji Wakikawa <ryuji@sfc.wide.ad.jp>, mext@ietf.org
Subject: Re: [MEXT] MCoA Update [pre07]
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Hi Ryuji,

Yes, most of my comments are now minor so, good job!.

The only issue that bothers me a little is whether the BU with H flag
set over the home link should be viewed as registration or
de-registration. I think either way works, but I need to think this
through just in case there is some implication that we do not see at
the moment.

See some comments inline.

Regards
George

2008/4/16 Ryuji Wakikawa <ryuji.wakikawa@gmail.com>:
> Hello George,
>
>  Thanks for comments!
>
>  It looks like your comments are more editorial one.
>  Can I assume you mostly agree on the changes?
>  I will revise the document quickly and post it again to MEXT.
>
>
>
>  On 2008/04/15, at 21:29, George Tsirtsis wrote:
..
>
> >
> >
> >
> >                     1                   2                   3
> >       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
> >                                      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >                                      |   Type = TBD  |     Length    |
> >      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >      +                                                               +
> >      :                        Link Layer address                     :
> >      +                                                               +
> >      +---------------------------------------------------------------+
> >
> >                      Figure 6: BID Mobility Option
> >
> >
> > GT> Figure caption seems wrong. Also, has such option never been
> > defined for MIPv6 before? I see that PMIPv6 draft also defined the
> > same option. I would hope that only one such option is needed for all
> > flavors of MIPv6?
> >
>
>  Do you mean the interface identifier option of PMIP6?
>  If that interface identifier is always LL address, we will reuse that
> option.
>  Or we can overwrite the sub-option spec. to carry the LL address always for
> MCoA in this spec.
>  I will discuss this with Sri.
>
>

GT2> Yes, I think it would be nice to coordinate with Sri, but  I am
not sure what you mean by "we can overwrite the sub-option spec...."


> >
> >
> >
> >
> >
> >  [Sending Deregistration Binding Update]
> >
> >
> >  o  As soon as a mobile node returns home, it sends a de-registration
> >     Binding Update to the home agent from the interface attached to
> >     the home link.
> >
> > GT> I think throughout the description of this mode of operation the
> > MN sends a *registration* not a *de-registration*. In fact you should
> > add somewhere that "A BU with H flag set MUST have a non-zero
> > Lifetime"
> >
>
>  I think MN can use the zero lifetime and de-register the BU.
>  MN continues setting the H flag for BUs to other interfaces attached to
> foreign link,
>  because MN attached to both foreign and home link.
>
>  MN sends BU from the interface attached to the home link just once.
>  After that BU, MN sends BU with H flag set from the other interfaces while
> it is at home link.
>
>  MN should not send BU from the home link multiple times..
>  That's why we said dregistration BU here.
>
>  What do you think?
>

GT2> Hmmm, I guess that could work too. Let's think about this a
minute. The way you are thinking about this, can the MN send a BU over
a foreign link with the H flag set, without having send the dereg BU
with H flag set first?



>
> >
> >  o  The mobile node MUST include the BID mobility option specifying
> >     the BID the mobile node had previously associated with the
> >     interface attached to the home link.  The 'H' flag MUST be set in
> >     the BID mobility option.  The 'C' flag MUST NOT be set and the
> >     care-of address field MUST NOT be included.  When the 'H' flag is
> >     set, the home agent recognizes that the mobile node wants to
> >     continue using interfaces attached to both home and visited links.
> >     Note that H flag MUST be set for all the binding updates sent from
> >     the mobile node (ex.  Binding Update for the interface attached to
> >     the foreign link).
> >
> > GT>// for the interface attached to the foreign link)./ for the
> > interface(s) attached to foreign link(s)).
> >
> >
> >
> >  o  The mobile node SHOULD include the Link-Layer address mobility
> >     option to notify the mobile node's link-layer address to the home
> >     agent, too.  This link-layer address is required for the home
> >     agent to send the Binding Acknowledgement and to forward the
> >     mobile node's packet.
> >
> >  o  According to [RFC-3775], the mobile node MUST start responding to
> >     Neighbor Solicitation for its home address right after it sends
> >
> >
> >
> > Wakikawa (Editor), et al.  Expires October 17, 2008            [Page 22]
> >
> > Internet-Draft                    MCoA                        April 2008
> >
> >
> >     the deregistration Binding Update to the home agent.  However, in
> >     this specification, the mobile node MUST NOT respond to Neighbor
> >     Solicitation before receiving a Binding Acknowledgement, since the
> >     home agent may continue proxying for the home address.
> >
> > GT> the MN must not respond to NS messages before and *after*
> > receiving the BA, right?
> >
>
>  This isn't such clear.
>  If HA returns [MCOARETURNHOME WO/NDP], MN MUST NOT respond to NS after the
> BA.
>  Otherwise, MN should answer to NS.
>
>

GT2> OK, some clarification maybe useful to indicate that what happens
after the BA depends on how the HA responds i.e., the BA's status
field.
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From: Ryuji Wakikawa <ryuji.wakikawa@gmail.com>
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Hi George,

On 2008/04/16, at 18:00, George Tsirtsis wrote:
> Hi Ryuji,
>
> Yes, most of my comments are now minor so, good job!.

Great! thanks.

> The only issue that bothers me a little is whether the BU with H flag
> set over the home link should be viewed as registration or
> de-registration. I think either way works, but I need to think this
> through just in case there is some implication that we do not see at
> the moment.

OK, please find my comments inline.

> See some comments inline.
>
> Regards
> George
>
> 2008/4/16 Ryuji Wakikawa <ryuji.wakikawa@gmail.com>:
>> Hello George,
>>
>> Thanks for comments!
>>
>> It looks like your comments are more editorial one.
>> Can I assume you mostly agree on the changes?
>> I will revise the document quickly and post it again to MEXT.
>>
>>
>>
>> On 2008/04/15, at 21:29, George Tsirtsis wrote:
> ..
>>
>>>
>>>
>>>
>>>                    1                   2                   3
>>>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>>>                                     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
>>> +-+
>>>                                     |   Type = TBD  |      
>>> Length    |
>>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- 
>>> +-+
>>>      
>>> +                                                               +
>>>     :                        Link Layer  
>>> address                     :
>>>      
>>> +                                                               +
>>>      
>>> +---------------------------------------------------------------+
>>>
>>>                     Figure 6: BID Mobility Option
>>>
>>>
>>> GT> Figure caption seems wrong. Also, has such option never been
>>> defined for MIPv6 before? I see that PMIPv6 draft also defined the
>>> same option. I would hope that only one such option is needed for  
>>> all
>>> flavors of MIPv6?
>>>
>>
>> Do you mean the interface identifier option of PMIP6?
>> If that interface identifier is always LL address, we will reuse that
>> option.
>> Or we can overwrite the sub-option spec. to carry the LL address  
>> always for
>> MCoA in this spec.
>> I will discuss this with Sri.
>>
>>
>
> GT2> Yes, I think it would be nice to coordinate with Sri, but  I am
> not sure what you mean by "we can overwrite the sub-option spec...."

I mean the MCoA spec clearly states to carry only LL address in this  
option.

>>>
>>>
>>> [Sending Deregistration Binding Update]
>>>
>>>
>>> o  As soon as a mobile node returns home, it sends a de-registration
>>>    Binding Update to the home agent from the interface attached to
>>>    the home link.
>>>
>>> GT> I think throughout the description of this mode of operation the
>>> MN sends a *registration* not a *de-registration*. In fact you  
>>> should
>>> add somewhere that "A BU with H flag set MUST have a non-zero
>>> Lifetime"
>>>
>>
>> I think MN can use the zero lifetime and de-register the BU.
>> MN continues setting the H flag for BUs to other interfaces  
>> attached to
>> foreign link,
>> because MN attached to both foreign and home link.
>>
>> MN sends BU from the interface attached to the home link just once.
>> After that BU, MN sends BU with H flag set from the other  
>> interfaces while
>> it is at home link.
>>
>> MN should not send BU from the home link multiple times..
>> That's why we said dregistration BU here.
>>
>> What do you think?
>>
>
> GT2> Hmmm, I guess that could work too. Let's think about this a
> minute. The way you are thinking about this, can the MN send a BU over
> a foreign link with the H flag set, without having send the dereg BU
> with H flag set first?

MN sends only one dereg-BU with H flag set and zero lifetime to HA  
from the home link.

After that deregistration, MN sends BU with H flag set from the  
foreign link to HA.
This tells HA that MN is still at the home link.
Once MN leaves from the home link, MN unset the H flag in BU so that  
HA can detect the MN's leaving.

>>> o  According to [RFC-3775], the mobile node MUST start responding to
>>>    Neighbor Solicitation for its home address right after it sends
>>>
>>>
>>>
>>> Wakikawa (Editor), et al.  Expires October 17, 2008             
>>> [Page 22]
>>>
>>> Internet-Draft                    MCoA                         
>>> April 2008
>>>
>>>
>>>    the deregistration Binding Update to the home agent.  However, in
>>>    this specification, the mobile node MUST NOT respond to Neighbor
>>>    Solicitation before receiving a Binding Acknowledgement, since  
>>> the
>>>    home agent may continue proxying for the home address.
>>>
>>> GT> the MN must not respond to NS messages before and *after*
>>> receiving the BA, right?
>>>
>>
>> This isn't such clear.
>> If HA returns [MCOARETURNHOME WO/NDP], MN MUST NOT respond to NS  
>> after the
>> BA.
>> Otherwise, MN should answer to NS.
>>
>>
>
> GT2> OK, some clarification maybe useful to indicate that what happens
> after the BA depends on how the HA responds i.e., the BA's status
> field.


Right. I will update this.

regards,
ryuji

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Hi George,

Permit me to join in ;p 

=8==8<=8==
> >  I think MN can use the zero lifetime and de-register the BU.
> >  MN continues setting the H flag for BUs to other 
> interfaces attached 
> > to foreign link,  because MN attached to both foreign and home link.
> >
> >  MN sends BU from the interface attached to the home link just once.
> >  After that BU, MN sends BU with H flag set from the other 
> interfaces 
> > while it is at home link.
> >
> >  MN should not send BU from the home link multiple times..
> >  That's why we said dregistration BU here.
> >
> >  What do you think?
> >
> 
> GT2> Hmmm, I guess that could work too. Let's think about this a
> minute. The way you are thinking about this, can the MN send 
> a BU over a foreign link with the H flag set, without having 
> send the dereg BU with H flag set first?
[Ben] My view is that the 'H' flag allows MN to tell HA that its wants to
use both home and foreign attach interface. Hence, sending it on reg-BU over
foreign link or de-reg BU over home link should be ok. From the BU over
foregin link case, as the 'H' flag is in the BID option, HA can look for the
corresponding entry in BCE (that matches the BID) and mark it as a special
entry to let it know that MN is also connected to the home link. Why I say
special entry is because the BID could be reuse by the MN for flow filtering
purposes (I think this was where we last stop the discussion ;p)

Regards,
Benjamin Lim.


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Hi Ryuji,

I think what you propose wrt de-registration BU with H-flag set,
works. I have a slight preference in viewing this as a registration
but my preference is based on semantics and I do not think it
technically impacts the solution.

For this reason I say that we go with your proposal, so after fixing
the final set of minor comments I think you should publish the draft.
Time for a proper WGLC ...at least from my side :-)

Regards
George

On Wed, Apr 16, 2008 at 10:05 AM, Ryuji Wakikawa
<ryuji.wakikawa@gmail.com> wrote:
> Hi George,
>
>
>  On 2008/04/16, at 18:00, George Tsirtsis wrote:
>
> > Hi Ryuji,
> >
> > Yes, most of my comments are now minor so, good job!.
> >
>
>  Great! thanks.
>
>
>
> > The only issue that bothers me a little is whether the BU with H flag
> > set over the home link should be viewed as registration or
> > de-registration. I think either way works, but I need to think this
> > through just in case there is some implication that we do not see at
> > the moment.
> >
>
>  OK, please find my comments inline.
>
>
>
>
> > See some comments inline.
> >
> > Regards
> > George
> >
> > 2008/4/16 Ryuji Wakikawa <ryuji.wakikawa@gmail.com>:
> >
> > > Hello George,
> > >
> > > Thanks for comments!
> > >
> > > It looks like your comments are more editorial one.
> > > Can I assume you mostly agree on the changes?
> > > I will revise the document quickly and post it again to MEXT.
> > >
> > >
> > >
> > > On 2008/04/15, at 21:29, George Tsirtsis wrote:
> > >
> > ..
> >
> > >
> > >
> > > >
> > > >
> > > >
> > > >                   1                   2                   3
> > > >     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
> > > >                                    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > > >                                    |   Type = TBD  |     Length    |
> > > >    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > > >    +                                                               +
> > > >    :                        Link Layer address                     :
> > > >    +                                                               +
> > > >    +---------------------------------------------------------------+
> > > >
> > > >                    Figure 6: BID Mobility Option
> > > >
> > > >
> > > > GT> Figure caption seems wrong. Also, has such option never been
> > > > defined for MIPv6 before? I see that PMIPv6 draft also defined the
> > > > same option. I would hope that only one such option is needed for all
> > > > flavors of MIPv6?
> > > >
> > > >
> > >
> > > Do you mean the interface identifier option of PMIP6?
> > > If that interface identifier is always LL address, we will reuse that
> > > option.
> > > Or we can overwrite the sub-option spec. to carry the LL address always
> for
> > > MCoA in this spec.
> > > I will discuss this with Sri.
> > >
> > >
> > >
> >
> > GT2> Yes, I think it would be nice to coordinate with Sri, but  I am
> > not sure what you mean by "we can overwrite the sub-option spec...."
> >
>
>  I mean the MCoA spec clearly states to carry only LL address in this
> option.
>
>
>
> >
> > >
> > > >
> > > >
> > > > [Sending Deregistration Binding Update]
> > > >
> > > >
> > > > o  As soon as a mobile node returns home, it sends a de-registration
> > > >   Binding Update to the home agent from the interface attached to
> > > >   the home link.
> > > >
> > > > GT> I think throughout the description of this mode of operation the
> > > > MN sends a *registration* not a *de-registration*. In fact you should
> > > > add somewhere that "A BU with H flag set MUST have a non-zero
> > > > Lifetime"
> > > >
> > > >
> > >
> > > I think MN can use the zero lifetime and de-register the BU.
> > > MN continues setting the H flag for BUs to other interfaces attached to
> > > foreign link,
> > > because MN attached to both foreign and home link.
> > >
> > > MN sends BU from the interface attached to the home link just once.
> > > After that BU, MN sends BU with H flag set from the other interfaces
> while
> > > it is at home link.
> > >
> > > MN should not send BU from the home link multiple times..
> > > That's why we said dregistration BU here.
> > >
> > > What do you think?
> > >
> > >
> >
> > GT2> Hmmm, I guess that could work too. Let's think about this a
> > minute. The way you are thinking about this, can the MN send a BU over
> > a foreign link with the H flag set, without having send the dereg BU
> > with H flag set first?
> >
>
>  MN sends only one dereg-BU with H flag set and zero lifetime to HA from the
> home link.
>
>  After that deregistration, MN sends BU with H flag set from the foreign
> link to HA.
>  This tells HA that MN is still at the home link.
>  Once MN leaves from the home link, MN unset the H flag in BU so that HA can
> detect the MN's leaving.
>
>
>
> >
> > >
> > > > o  According to [RFC-3775], the mobile node MUST start responding to
> > > >   Neighbor Solicitation for its home address right after it sends
> > > >
> > > >
> > > >
> > > > Wakikawa (Editor), et al.  Expires October 17, 2008            [Page
> 22]
> > > >
> > > > Internet-Draft                    MCoA                        April
> 2008
> > > >
> > > >
> > > >   the deregistration Binding Update to the home agent.  However, in
> > > >   this specification, the mobile node MUST NOT respond to Neighbor
> > > >   Solicitation before receiving a Binding Acknowledgement, since the
> > > >   home agent may continue proxying for the home address.
> > > >
> > > > GT> the MN must not respond to NS messages before and *after*
> > > > receiving the BA, right?
> > > >
> > > >
> > >
> > > This isn't such clear.
> > > If HA returns [MCOARETURNHOME WO/NDP], MN MUST NOT respond to NS after
> the
> > > BA.
> > > Otherwise, MN should answer to NS.
> > >
> > >
> > >
> >
> > GT2> OK, some clarification maybe useful to indicate that what happens
> > after the BA depends on how the HA responds i.e., the BA's status
> > field.
> >
>
>
>  Right. I will update this.
>
>  regards,
>  ryuji
>
>
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Jari,

> The IPv6 network prefix is there presumably because we want 
> to enable the use of the HA anycast address. There is nothing 
> corresponding in IPv4, so we don't need a prefix. And this 
> draft does not give us IPv6 home addresses, so there is no 
> need for IPv4 home addresses either.

In deployments where the per-MN prefix model is used, letting the MN know the home prefix is equal to assigning the address to the MN. I'm not clear if DHAAD works with per-MN prefix model. I thought that the main purpose of the home network prefix is the same as the MIP6_HOME_PREFIX attribute from RFC 5026. For DHAAD, the better way might be to include prefix length in the Home agent address option, and if the bits after the prefix length are zero, the MN should run DHAAD. In this way the MN could be told to run DHAAD with one prefix and use another prefix for its home address configuration. 

domagoj


> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: 16. travanj 2008 10:22
> To: heejin.jang@samsung.com
> Cc: Premec, Domagoj; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> Heejin,
> 
> >> This is actually a problem in -13 (I reviewed it myself 
> after sending 
> >> out the mail this morning).
> >>
> >> I think we need to be able to indicate (a) FQDNs, (b) IPv6 
> addresses, 
> >> or
> >> (c) IPv4 addresses. DNS is quite capable of resolving an FQDN to 
> >> either
> >> IPv4 or IPv6 addresses or both... no flags needed.
> >>     
> >
> > Ok.  for FQDN sub-opt-code, I'll fallback to the previous 
> version. (v12).
> >  
> >   
> >> And I think this draft should only focus on Mobile IPv6. 
> We get the 
> >> Mobile IPv6 home agent's addresses (be it v4 or v6), not something 
> >> else...
> >>     
> >
> > " focus on Mobile IPv6..not something else..." means there 
> is no need 
> > to add what Premec suggested, that is IPv4 HoA, IPv4 subnet?
> >   
> 
> The IPv6 network prefix is there presumably because we want 
> to enable the use of the HA anycast address. There is nothing 
> corresponding in IPv4, so we don't need a prefix. And this 
> draft does not give us IPv6 home addresses, so there is no 
> need for IPv4 home addresses either.
> 
> > For clarity, then I'll revise as below. (Your previous mail 
> was also 
> > considered.)
> >
> > OLD: 
> >        Sub-opt-code
> >
> >                0    Reserved
> >                1    Home network identifier (only admitted
> >                      in a Home Network Information option)
> >                2    IPv6 home network prefix
> >                3    IPv6 home agent address
> >                4    IPv4 address of the dual-stacked home agent
> >                5    Home agent FQDN
> >                6 .. (2^16-1) Reserved
> > NEW:
> >                0    Reserved
> >                1    Home network identifier (only admitted
> >                      in a Home Network Information option)
> >                2    IPv6 home network prefix
> >                3    IPv6 home agent address
> >                4    Home agent FQDN
> >                5 .. (2^16-1) Reserved
> >   
> 
> No, this is wrong. You *do* need to have IPv4 address of the 
> Mobile IPv6 home agent as well. Don't change this part, just 
> change the parts where you talked about Mobile IPv4... these 
> options will give you access to the Mobile IPv6 service, be 
> it over IPv4, IPv6 or whatever. But these options do not give 
> you access to Mobile IPv4 service.
> 
> > /* Node that the below is for IPv6 address sub-opt-code, 
> not for FQDN 
> > sub-opt-code*/
> >
> > When the Sub-opt-code is set to 3, the Home Network Parameter field 
> > MUST consist of a Flags octet followed by the 128-bit IPv6 
> address of 
> > the home agent.  The most significant bit of the Flags 
> octet encodes a 
> > DSMIP field, and the seven remaining bits are Reserved 
> (must be set to 
> > 0 and ignored on receipt).  A Value of 1 in the DSMIP field 
> indicates 
> > that the home agent specified by the following IPv6 address has an 
> > IPv4 address and has a capability to support DSMIPv6 [DSMIPv6]. A 
> > value of 0 means that the home agent only supports Mobile IPv6.
> >   
> 
> I don't see a need for this. You will deliver one or several 
> of: IPv4 address, IPv6 address, IPv6 prefix, FQDN. Depending 
> on what you get and how the FQDN is resolved, you will either 
> have or not have IPv4 addresses in your final set. If you do, 
> that means that server should be contactable by IPv4 using 
> DSMIP. No flag needed.
> 
> Jari
> 
> 
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> In deployments where the per-MN prefix model is used, letting the MN know the home prefix is equal to assigning the address to the MN. I'm not clear if DHAAD works with per-MN prefix model. I thought that the main purpose of the home network prefix is the same as the MIP6_HOME_PREFIX attribute from RFC 5026. For DHAAD, the better way might be to include prefix length in the Home agent address option, and if the bits after the prefix length are zero, the MN should run DHAAD. In this way the MN could be told to run DHAAD with one prefix and use another prefix for its home address configuration. 
>   

Clearly we had different ideas about the use of the prefix in hiopt. But
I think it is intended for the use of DHAAD. See paragraph 1 in Section 1.

I don't think this draft should be extended to deal with the home
address configuration (be it per-mn prefix or individual addresses).

Jari

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Hi, Jari. 

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: Wednesday, April 16, 2008 5:22 PM
> To: heejin.jang@samsung.com
> Cc: Premec, Domagoj; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> Heejin,
> 
> >> This is actually a problem in -13 (I reviewed it myself 
> after sending 
> >> out the mail this morning).
> >>
> >> I think we need to be able to indicate (a) FQDNs, (b) IPv6 
> addresses, 
> >> or
> >> (c) IPv4 addresses. DNS is quite capable of resolving an FQDN to 
> >> either
> >> IPv4 or IPv6 addresses or both... no flags needed.
> >>     
> >
> > Ok.  for FQDN sub-opt-code, I'll fallback to the previous 
> version. (v12).
> >  
> >   
> >> And I think this draft should only focus on Mobile IPv6. 
> We get the 
> >> Mobile IPv6 home agent's addresses (be it v4 or v6), not something 
> >> else...
> >>     
> >
> > " focus on Mobile IPv6..not something else..." means there 
> is no need 
> > to add what Premec suggested, that is IPv4 HoA, IPv4 subnet?
> >   
> 
> The IPv6 network prefix is there presumably because we want 
> to enable the use of the HA anycast address. There is nothing 
> corresponding in IPv4, so we don't need a prefix. And this 
> draft does not give us IPv6 home addresses, so there is no 
> need for IPv4 home addresses either.

As far as I know, there is a dynamic discovery in MIPv4, too. 
Section 3.6.1.2. of draft-ietf-mip4-rfc3344bis-06.txt described about that
procedures (page 47, last paragraph).

But these new options do not aim at allowing access to MIPv4 as you told, 
IPv4 HoA and IPv4 subnet won't be included in a new version.

> 
> > For clarity, then I'll revise as below. (Your previous mail 
> was also 
> > considered.)
> >
> > OLD: 
> >        Sub-opt-code
> >
> >                0    Reserved
> >                1    Home network identifier (only admitted
> >                      in a Home Network Information option)
> >                2    IPv6 home network prefix
> >                3    IPv6 home agent address
> >                4    IPv4 address of the dual-stacked home agent
> >                5    Home agent FQDN
> >                6 .. (2^16-1) Reserved
> > NEW:
> >                0    Reserved
> >                1    Home network identifier (only admitted
> >                      in a Home Network Information option)
> >                2    IPv6 home network prefix
> >                3    IPv6 home agent address
> >                4    Home agent FQDN
> >                5 .. (2^16-1) Reserved
> >   
> 
> No, this is wrong. You *do* need to have IPv4 address of the 
> Mobile IPv6 home agent as well. Don't change this part, just 
> change the parts where you talked about Mobile IPv4... these 
> options will give you access to the Mobile IPv6 service, be 
> it over IPv4, IPv6 or whatever. But these options do not give 
> you access to Mobile IPv4 service.

I see. Ok.

> > /* Node that the below is for IPv6 address sub-opt-code, 
> not for FQDN 
> > sub-opt-code*/
> >
> > When the Sub-opt-code is set to 3, the Home Network Parameter field 
> > MUST consist of a Flags octet followed by the 128-bit IPv6 
> address of 
> > the home agent.  The most significant bit of the Flags 
> octet encodes a 
> > DSMIP field, and the seven remaining bits are Reserved 
> (must be set to 
> > 0 and ignored on receipt).  A Value of 1 in the DSMIP field 
> indicates 
> > that the home agent specified by the following IPv6 address has an 
> > IPv4 address and has a capability to support DSMIPv6 [DSMIPv6]. A 
> > value of 0 means that the home agent only supports Mobile IPv6.
> >   
> 
> I don't see a need for this. You will deliver one or several 
> of: IPv4 address, IPv6 address, IPv6 prefix, FQDN. Depending 
> on what you get and how the FQDN is resolved, you will either 
> have or not have IPv4 addresses in your final set. If you do, 
> that means that server should be contactable by IPv4 using 
> DSMIP. No flag needed.

Ok. I'll keep using the previous one. 

Thanks again. :)

- Best regards, 
Heejin

> Jari
> 
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I see. I guess I was mislead by the definition of Home network prefix option, which explicitely mentions addresses configuration:

>Valid Lifetime
>
> 32-bit unsigned integer.  
> The length of time in seconds
> (relative to the time the packet is sent) that addresses
> generated from the prefix via stateless address
> auto-configuration remain in the valid state [RFC4862]. 

domagoj

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: 16. travanj 2008 11:50
> To: Premec, Domagoj
> Cc: heejin.jang@samsung.com; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> 
> > In deployments where the per-MN prefix model is used, 
> letting the MN know the home prefix is equal to assigning the 
> address to the MN. I'm not clear if DHAAD works with per-MN 
> prefix model. I thought that the main purpose of the home 
> network prefix is the same as the MIP6_HOME_PREFIX attribute 
> from RFC 5026. For DHAAD, the better way might be to include 
> prefix length in the Home agent address option, and if the 
> bits after the prefix length are zero, the MN should run 
> DHAAD. In this way the MN could be told to run DHAAD with one 
> prefix and use another prefix for its home address configuration. 
> >   
> 
> Clearly we had different ideas about the use of the prefix in 
> hiopt. But I think it is intended for the use of DHAAD. See 
> paragraph 1 in Section 1.
> 
> I don't think this draft should be extended to deal with the 
> home address configuration (be it per-mn prefix or individual 
> addresses).
> 
> Jari
> 
> 
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See below. 

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: Wednesday, April 16, 2008 6:50 PM
> To: Premec, Domagoj
> Cc: heejin.jang@samsung.com; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> 
> > In deployments where the per-MN prefix model is used, 
> letting the MN know the home prefix is equal to assigning the 
> address to the MN. I'm not clear if DHAAD works with per-MN 
> prefix model. I thought that the main purpose of the home 
> network prefix is the same as the MIP6_HOME_PREFIX attribute 
> from RFC 5026. For DHAAD, the better way might be to include 
> prefix length in the Home agent address option, and if the 
> bits after the prefix length are zero, the MN should run 
> DHAAD. In this way the MN could be told to run DHAAD with one 
> prefix and use another prefix for its home address configuration. 
> >   
> 
> Clearly we had different ideas about the use of the prefix in 
> hiopt. But I think it is intended for the use of DHAAD. See 
> paragraph 1 in Section 1.

As shown in Fig in page 10 of v13, the sub-option with sub-opt-code 1 
carries home network prefix together with valid & preferred lifetimes.
This means that the prefix also will be used for IPv6 address autoconfiguration.
I meant that the provided prefix was both for DHAAD and for Autoconf.

If the provided prefix is intended only for the use of DHAAD and 
the auto-configuration is not allowed with it, it should be mentioned clearly
in the document..isn't it?

> I don't think this draft should be extended to deal with the 
> home address configuration (be it per-mn prefix or individual 
> addresses).
> 
> Jari
> 
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From mext-bounces@ietf.org  Wed Apr 16 03:14:52 2008
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Some prefixes allocated for IPv6 autoconfiguration may not 
be available for DHAAD. So the current sub-opt-code 1 (both for auto-conf 
and DHAAD) is not exact in that sense. Now if we narrow down the use of 
the provided  prefix for only DHAAD, I need to mention it in the document.
 
Agree?

------- Original Message -------
Sender : Heejin Jang<heejin.jang@samsung.com> R&D Staff Member/Communication & Networking Lab/Samsung Advanced Institute of Technology
Date   : 2008-04-16 19:04 (GMT+09:00)
Title  : Re: Re: [MEXT] FW: Summary for the changes in hiopt-13

 
See below. 

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: Wednesday, April 16, 2008 6:50 PM
> To: Premec, Domagoj
> Cc: heejin.jang@samsung.com; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> 
> > In deployments where the per-MN prefix model is used, 
> letting the MN know the home prefix is equal to assigning the 
> address to the MN. I&#39;m not clear if DHAAD works with per-MN 
> prefix model. I thought that the main purpose of the home 
> network prefix is the same as the MIP6_HOME_PREFIX attribute 
> from RFC 5026. For DHAAD, the better way might be to include 
> prefix length in the Home agent address option, and if the 
> bits after the prefix length are zero, the MN should run 
> DHAAD. In this way the MN could be told to run DHAAD with one 
> prefix and use another prefix for its home address configuration. 
> >   
> 
> Clearly we had different ideas about the use of the prefix in 
> hiopt. But I think it is intended for the use of DHAAD. See 
> paragraph 1 in Section 1.

As shown in Fig in page 10 of v13, the sub-option with sub-opt-code 1 
carries home network prefix together with valid & preferred lifetimes.
This means that the prefix also will be used for IPv6 address autoconfiguration.
I meant that the provided prefix was both for DHAAD and for Autoconf.

If the provided prefix is intended only for the use of DHAAD and 
the auto-configuration is not allowed with it, it should be mentioned clearly
in the document..isn&#39;t it?

> I don&#39;t think this draft should be extended to deal with the 
> home address configuration (be it per-mn prefix or individual 
> addresses).
> 
> Jari
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Heejin,

> As shown in Fig in page 10 of v13, the sub-option with sub-opt-code 1 
> carries home network prefix together with valid & preferred lifetimes.
> This means that the prefix also will be used for IPv6 address autoconfiguration.
> I meant that the provided prefix was both for DHAAD and for Autoconf.
>
> If the provided prefix is intended only for the use of DHAAD and 
> the auto-configuration is not allowed with it, it should be mentioned clearly
> in the document..isn't it?
>   
I agree that this should be made clear in the document.

But I'm also getting the sense that we're piling on many things into
this document (including late changes), and it does not make me feel good.

I tried to trace which caused us to insert the lifetimes into the
document in version 11, but was unable to find it. Perhaps someone
complained about the inability to see prefix length (version 10 had that
problem)?

In any case, I really do not want this document to extend itself into
address configuration. You do not have the explanations or mechanisms in
the document to do that. For instance, how would it work with security,
i.e., avoiding grabbing someone else's address? Perhaps more to the
point, we have already stretched our ability to make changes in late
reviews, and we are close to sending it back to the WG.

I would suggest stating that the prefix information is for DHAAD only,
or alternatively removing the entire concept of sending prefix information.

Jari

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Hi,

the idea of the related sentence in Section 3.8.1. in the requirements docu=
ment is to reduce the set of nodes to whom the MR has a trust relationship =
with (wrt certificates) to one where it is guaranteed that it will work and=
 the certificates are stable and reliable.

Extending it to the CNs involves problems and assuming a distributed PKI wi=
th numerous CAs for the future in aviation has its own problems, like the c=
omplex building of certification paths in case of bridges, using the correc=
t certificate or problems with certain local policies. Given a certificate =
is not accepted at the CN (for whathever reasons) there must still be a way=
 communication can take place, and having RO is necessary for this purpose.
Fact is no one knows when an "end2end" PKI is available and how reliably it=
 will work. Basing the *primary* RO solution on such an assumption seems da=
ngerous and as the requirements document says "anchor points may be owned b=
y the service providers" it seems reasonable to take advantage of airlines =
and communication service providers having contracts with each other for th=
e purpose of RO.

Christian


-----Urspr=FCngliche Nachricht-----
Von: mext-bounces@ietf.org im Auftrag von Tony Whyman
Gesendet: Mi 16.04.2008 10:52
An: mext@ietf.org
Betreff: [MEXT] Global PKIs ( was Re:  changes in the CNs)
 =

Dear all,

 From some off list discussions that have taken place, I get the feeling =

that different people focus on different issues when the term "global =

PKI" is mentioned. There is thus a need to agree on the interpretation =

of the term "global PKI".

Firstly, there is a clear need to separate out discussion on the =

technology used (certificate formats, digital signature algorithms, =

etc.) from the process of issuing certificates (politics).

In my paper and posts, I have assumed an evolutionary approach to both, =

with a single global PKI being the logical outcome of this process. On =

the other hand, I have no problem in conceding that the move from =

regional to a single global PKI may have political issues associated =

with it, in the sense that one CA may have problems recognising the =

validity and integrity of the process performed by another CA. It may =

thus be a very long evolutionary process.

My proposal is thus that the requirement for an aviation global PKI is =

interpreted as a need for a core common PKI technology supporting a =

number of regional PKIs, with a long term objective of evolving into a =

single global PKI.

My assumption here is that the main problem in establishing a regional =

PKI is technology, while joining the regions together to form a single =

global PKI is a political problem. A region is thus self-defining.

The practical implication is that an aircraft will need a certificate =

for each region in which it operates and will need to be able to =

validate certificates presented to it issued by the CAs responsible for =

those regions. Implementations will have to be able to work with =

multiple certificates and CAs. Only when CAs start issuing =

cross-certificates for each other, will the number of certificates that =

an aircraft needs, be reduced.

The issuing of the cross-certificate is where the political issue arises =

as will only be done when a given regional  CA is fully satisfied as to =

the validity and integrity of the process performed by another regional CA.

Regards

Tony Whyman



_______________________________________________
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_______________________________________________
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Subject: Re: [MEXT] Global PKIs ( was Re:  changes in the CNs)
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Christian,

Your comment "Given a certificate is not accepted at the CN (for =

whatever reason) there must still be a way communication can take =

place..." reminds me of a now deleted requirement in the original ATN =

SARPs. This was titled "Emergency use of a Mobile Subnetwork" and =

basically said that if an aircraft calls within 5 mins of comms being =

rejected, it must be accepted - at least for emergency use (knock twice =

and you're in). Without qualifying what "an emergency" was, this =

requirement was aimed at ensuring comms would be available. I was =

certainly present at the meeting that agreed this, and the requirement =

reads as if I wrote it - but I can't remember that degree of detail. The =

point is, it was later deleted once the operational people got involved.

The comms group that wrote the original SARPs thought like you do (like =

I did), that there must always be a way for data link communication to =

take place. The operational people beg to differ. If you look at the way =

the European system works today, data link equipped aircraft must =

explicitly identify themselves to the ATC Provider and, unless they are =

on a list of approved aircraft, they will be rejected for data link service.

The reason for this is air safety. The ATC Provider needs to be sure =

that the aircraft's data link implementation has been properly certified =

and approved for use. Data link is supplementary to a general =

certificate of air-worthiness and hence must be separately verified An =

aircraft that does not have certified equipment on board, or is from an =

airline whose pilot procedures for use of data link have not been =

approved, may be a hazard to other airspace users. Hence service denied.

What happens to the aircraft? It must have a working VHF radio and hence =

can still be offered voice based ATC services. At present, ATC for that =

aircraft is simply less efficient than it should be. In the future, this =

will mean that the aircraft will be limited in its choice of airspaces =

and will probably have to bump around at 20,000 feet.

However, there is another problem lurking here and that is that the =

current ATN-OSI was designed around the open access principle. The =

current system cannot provide a proof of identity. This is acceptable =

for the present, partly because the ATN-OSI protocols are not part of =

every Linux distribution and hence there is a technical barrier to =

overcome for any attacker, and partly because of high quality =

Surveillance from SSR Mode S radars. Controllers can readily spot any =

discrepancy between data comms, voice comms and the Airspace picture.

A move to ATN-IP potentially removes one of those props and simply by =

using industry standard protocols without any mitigation, weakens the =

system. It also makes it difficult to realise any cost savings by =

reducing dependency on SSR Mode S.

An important Operational Requirement was missed first time around and it =

seems to me fairly obviously that now the requirement is known, any =

ATN-IP must respect it. That is identity of aircraft must be visible to =

the ATC Provider, and credentials offered that support that identity. =

This is so that Data Link ATC Service is not given to unapproved aircraft.

There is a validated ATN-OSI specification (PKI based) to add a proof to =

the identity. The business case for this enhancement is not there yet - =

but one day it will be - if only because having a signed certificate =

will be easier to manage than an ever growing list of approved aircraft. =

It would be nice if you can put the case: rather than investing more in =

the old system, why not put the money into deploying ATN-IP.

You may argue that a Service Provider could still be a proxy and check =

the identity on behalf of the ATC Provider. But think of the liability =

issues. I doubt whether the risk of getting this wrong is insurable.

Hence my own view that any ATN-IP has to start from the assumption that =

there is a direct trust relationship between the ATC Provider and the =

aircraft it serves. IPsec supported by an appropriate PKI appears to be =

the correct way of realising this.


Regards

Tony



Christian.Bauer@dlr.de wrote:
> Hi,
>
> the idea of the related sentence in Section 3.8.1. in the requirements do=
cument is to reduce the set of nodes to whom the MR has a trust relationshi=
p with (wrt certificates) to one where it is guaranteed that it will work a=
nd the certificates are stable and reliable.
>
> Extending it to the CNs involves problems and assuming a distributed PKI =
with numerous CAs for the future in aviation has its own problems, like the=
 complex building of certification paths in case of bridges, using the corr=
ect certificate or problems with certain local policies. Given a certificat=
e is not accepted at the CN (for whathever reasons) there must still be a w=
ay communication can take place, and having RO is necessary for this purpos=
e.
> Fact is no one knows when an "end2end" PKI is available and how reliably =
it will work. Basing the *primary* RO solution on such an assumption seems =
dangerous and as the requirements document says "anchor points may be owned=
 by the service providers" it seems reasonable to take advantage of airline=
s and communication service providers having contracts with each other for =
the purpose of RO.
>
> Christian
>
>
> -----Urspr=FCngliche Nachricht-----
> Von: mext-bounces@ietf.org im Auftrag von Tony Whyman
> Gesendet: Mi 16.04.2008 10:52
> An: mext@ietf.org
> Betreff: [MEXT] Global PKIs ( was Re:  changes in the CNs)
>  =

> Dear all,
>
>  From some off list discussions that have taken place, I get the feeling =

> that different people focus on different issues when the term "global =

> PKI" is mentioned. There is thus a need to agree on the interpretation =

> of the term "global PKI".
>
> Firstly, there is a clear need to separate out discussion on the =

> technology used (certificate formats, digital signature algorithms, =

> etc.) from the process of issuing certificates (politics).
>
> In my paper and posts, I have assumed an evolutionary approach to both, =

> with a single global PKI being the logical outcome of this process. On =

> the other hand, I have no problem in conceding that the move from =

> regional to a single global PKI may have political issues associated =

> with it, in the sense that one CA may have problems recognising the =

> validity and integrity of the process performed by another CA. It may =

> thus be a very long evolutionary process.
>
> My proposal is thus that the requirement for an aviation global PKI is =

> interpreted as a need for a core common PKI technology supporting a =

> number of regional PKIs, with a long term objective of evolving into a =

> single global PKI.
>
> My assumption here is that the main problem in establishing a regional =

> PKI is technology, while joining the regions together to form a single =

> global PKI is a political problem. A region is thus self-defining.
>
> The practical implication is that an aircraft will need a certificate =

> for each region in which it operates and will need to be able to =

> validate certificates presented to it issued by the CAs responsible for =

> those regions. Implementations will have to be able to work with =

> multiple certificates and CAs. Only when CAs start issuing =

> cross-certificates for each other, will the number of certificates that =

> an aircraft needs, be reduced.
>
> The issuing of the cross-certificate is where the political issue arises =

> as will only be done when a given regional  CA is fully satisfied as to =

> the validity and integrity of the process performed by another regional C=
A.
>
> Regards
>
> Tony Whyman
>
>
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>
>   =

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Jari,

> I would suggest stating that the prefix information is for 
> DHAAD only, or alternatively removing the entire concept of 
> sending prefix information.

I'm a bit worried about restricting the usage of the home prefix acquired via hiopt only to DHAAD. If we do that, we end up with two categories of home network prefixes: one that is allowed to be used only for DHAAD and the other one which is RFC 3775 conformant and is good for DHAAD, home link detection and address configuration. I don't think it should matter how the MN obtained the home link prefix. Once it gets it, it should be able to use it as per RFC 3775, without additional restrictions. 

Maybe the Home network prefix option should be removed from the draft and instead use the Home agent address option with IID bits set to zero to indicate DHAAD. This seems like a cleaner approach to me.

Having said that, I don't want to delay the hiopt draft, and I'm fine with progressing the draft as per your comments.

domagoj 

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: 16. travanj 2008 12:26
> To: heejin.jang@samsung.com
> Cc: Premec, Domagoj; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> Heejin,
> 
> > As shown in Fig in page 10 of v13, the sub-option with 
> sub-opt-code 1 
> > carries home network prefix together with valid & preferred 
> lifetimes.
> > This means that the prefix also will be used for IPv6 
> address autoconfiguration.
> > I meant that the provided prefix was both for DHAAD and for 
> Autoconf.
> >
> > If the provided prefix is intended only for the use of 
> DHAAD and the 
> > auto-configuration is not allowed with it, it should be mentioned 
> > clearly in the document..isn't it?
> >   
> I agree that this should be made clear in the document.
> 
> But I'm also getting the sense that we're piling on many 
> things into this document (including late changes), and it 
> does not make me feel good.
> 
> I tried to trace which caused us to insert the lifetimes into 
> the document in version 11, but was unable to find it. 
> Perhaps someone complained about the inability to see prefix 
> length (version 10 had that problem)?
> 
> In any case, I really do not want this document to extend 
> itself into address configuration. You do not have the 
> explanations or mechanisms in the document to do that. For 
> instance, how would it work with security, i.e., avoiding 
> grabbing someone else's address? Perhaps more to the point, 
> we have already stretched our ability to make changes in late 
> reviews, and we are close to sending it back to the WG.
> 
> I would suggest stating that the prefix information is for 
> DHAAD only, or alternatively removing the entire concept of 
> sending prefix information.
> 
> Jari
> 
> 
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From mext-bounces@ietf.org  Thu Apr 17 00:58:09 2008
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From: Heejin Jang <heejin.jang@samsung.com>
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Hi, Jari.
 
I've submitted new draft (hiopt-14) which reflects Alfred's lated comments 
and the discussion results about  sub-opt-codes.
 
Regarding sub-option for IPv6 home network prefix, for minimum change, 
I kept using the same set of sub-opt-codes as you recommened, and
the Home Network Parameter field in the sub-option was just simplified without
lifetimes because they were intended to be used for address auto-configuration.

 - Best regards, 
Heejin 

------- Original Message -------
Sender : Jari Arkko<jari.arkko@piuha.net>
Date   : 2008-04-16 19:26 (GMT+09:00)
Title  : Re: [MEXT] FW: Summary for the changes in hiopt-13

Heejin,

> As shown in Fig in page 10 of v13, the sub-option with sub-opt-code 1 
> carries home network prefix together with valid & preferred lifetimes.
> This means that the prefix also will be used for IPv6 address autoconfiguration.
> I meant that the provided prefix was both for DHAAD and for Autoconf.
>
> If the provided prefix is intended only for the use of DHAAD and 
> the auto-configuration is not allowed with it, it should be mentioned clearly
> in the document..isn&#39;t it?
>   
I agree that this should be made clear in the document.

But I&#39;m also getting the sense that we&#39;re piling on many things into
this document (including late changes), and it does not make me feel good.

I tried to trace which caused us to insert the lifetimes into the
document in version 11, but was unable to find it. Perhaps someone
complained about the inability to see prefix length (version 10 had that
problem)?

In any case, I really do not want this document to extend itself into
address configuration. You do not have the explanations or mechanisms in
the document to do that. For instance, how would it work with security,
i.e., avoiding grabbing someone else&#39;s address? Perhaps more to the
point, we have already stretched our ability to make changes in late
reviews, and we are close to sending it back to the WG.

I would suggest stating that the prefix information is for DHAAD only,
or alternatively removing the entire concept of sending prefix information.

Jari

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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From: "George Tsirtsis" <tsirtsis@googlemail.com>
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Subject: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
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Hi all,

Here is the clarification text for IKEv2/IPSEC and DSMIPv6
interactions. In particular, the text clarifies the behavior when the
MN is connected to an IPv4 network, which RFC4877 does not cover.

Thanks to Pasi for his review and his help with defining the required
SPDs; also thanks to Wassim and Hesham for their review.
Hesham will fold the following text appropriately into the DSMIPv6
draft following a hopefully quick review from the group.

Best Regards
George
P.S.: I will have intermittent connectivity Friday-Sunday.


-----------------------------------------------------------------------------------------------------------------------
DSMIPv6 defines a number of possible data encapsulations depending on
the MN's connectivity and MN's and HA's configuration. These
encapsulations and the signaling required to establish them, are
straight forward when the MN is connected to an IPv6 capable network.
Some clarification is, however, needed for IKEv2/IPSEC operations when
the MN is connected to an IPv4-only network.


1. IKEv2 operation for securing DSMIPv6 Signaling over IPv4

RFC4877 defines how IKEv2 is used for Mobile IPv6 and RFC4306 includes
information about how IKEv2 runs over IPv4/UDP for NAT Traversal. A
DSMIPv6 MN connected to an IPv4-only network then,  needs to follow
the procedures described below.

To establish an SA for the protection of BU/BA messages, the DSMIPv6
MN and the HA SHOULD implement the following IKEv2 compatible
procedure:

        Mobile Node                      Home Agent
        -----------                      ----------
       IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
        UDP (500, 500) HDR, SAi1, KEi, Ni
          NAT-D, NAT-D -->
                            <--    IPv4(source_addr=HAADDR, dest_addr=V4ADDR)
                                    UDP(500,X) HDR, SAr1, KEr, Nr, [CERTREQ]
                                               NAT-D, NAT-D

        IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
        UDP (4500,4500) <non-ESP Marker> HDR, SK
           {IDi, [CERT,] [CERTREQ,] [IDr,] AUTH, SAi2, TSi, TSr}
                                -->

                              <-- IPv4(source_addr=HAADDR, dest_addr=V4ADDR)
                                   UDP (4500,Y) <non-ESP Marker> HDR*#, SK
                                       {IDr, [CERT,] AUTH, SAr2, TSi, TSr}


The SPDs are as shown in RFC 4877 Section 7.2.1

       mobile node SPD-S:
         - IF local_address = home_address_1 &
              remote_address = home_agent_1 &
              proto = MH & local_mh_type = BU & remote_mh_type = BAck
           Then use SA ESP transport mode
           Initiate using IDi = user_1 to address home_agent_1

       home agent SPD-S:
         - IF local_address = home_agent_1 &
              remote_address = home_address_1 &
              proto = MH & local_mh_type = BAck & remote_mh_type = BU
           Then use SA ESP transport mode

where home_address_1 is the MN's registered IPv6 home address and
home_agent_1 is the IP address of the home agent

The above should result in BU/BA messages with the following encapsulations:
   Binding update received by the home agent:
  IPv4 header (src=V4ADDR, dst=HA_V4ADDR)
    UDP header (sport=X, dport=DSMIPv6)
      IPv6 header (src=V6HOA, dst=HAADDR)
        ESP Header in Transport Mode
          Mobility header
            BU [IPv4 HAO]
             IPv4 CoA option
		   (+ other as needed)


At the home agent, following UDP de-tunneling the Binding Update is
delivered to the IPSEC module as shown below:

       IPv6 header (src=V6HOA, dst=HAADDR)
         ESP Header in Transport Mode
           Mobility header
             BU [IPv4 HAO]
              IPv4 CoA option
                (+ other as needed)

The Binding Update following IPSEC processing is delivered to the
DSMIPv6 home agent module as follows:

       IPv6 header (src=V6HOA, dst=HAADDR)
         Mobility header
           BU [IPv4 HAO]
            IPv4 CoA option
              (+ other as needed)


The Binding Acknowledgement sent by the home agent module to the IPSEC
module is as follows:

        IPv6 header (src=HAADDR, dst=V6HOA)
            Mobility Header
              BA ([IPv4 ACK], NAT DET)
               (+ other as needed)

The Binding Acknowledgement send by the HA to the MN is as follows:

  IPv4 header (src= HA_V4ADDR, dst=V4ADDR)
    UDP Header (sport=DSMIPv6, dport=Y)
       IPv6 header (src=HAADDR, dst=V6HOA)
         ESP Header in Transport Mode
           Mobility Header
             BA ([IPv4 ACK], NAT DET)



2. IKEv2 operation for securing DSMIPv6 Data over IPv4

To secure data traffic when the MN is located on an IPv4 only network,
the MN MUST establish a child_SA for that purpose. The procedure is as
follows:

        Mobile Node                      Home Agent
        -----------                      ----------
UDP (4500,4500) <non-ESP Marker> HDR, SK
   {[N], SA, Ni, [KEi],[TSi, TSr]}    -->

                                <-- UDP (4500,Y) <non-ESP Marker> HDR, SK
                                      {SA, Nr, [KEr], [TSi, TSr]}


If no NAT is detected, the encapsulation used will be:
   IPv4 (source_addr=v4CoA, dest_addr=HAAddr)
     ESP
      IP (source_addr=HoA, set_addr=CNAddr)
        Upper_layer_HDR
where IP=IPv4 or IPv6 and HoA=v4HoA or v6HoA

If NAT is detected, the encapsulation used will be
   IPv4 (source_addr=v4Addr, dest_addr=HAAddr)
      UDP (sport=X, dport=4500)
       ESP
         IP (source_addr=HoA, set_addr=CNAddr)
           Upper_layer_HDR
where v4CoA may be the external IPv4 address of the NAT, IP is either
IPv4 or IPv6 header and HoA is either the IPv4 or the IPv6 HoA

The SPD for data decryption whether NAT is detected or not is set as
follows. Note that this rule is designed to match all data from the MN
to nodes other than the HA. This is done so that this rule does not
overlap with the earlier rule securing BU/BA signaling between the MN
and the HA.

      Mobile Node SPD-S:
	- IF local_address = home_address &
	     remote_address != home_agent &
           proto=any
	  Then use SA ESP tunnel mode
   	Initiate using IDi = user_1 to address home_agent_1

       home agent SPD-S:
      - IF local_address != home_agent &
              remote_address = home_address &
              proto = any
        Then use SA ESP tunnel mode

where home_address is the MN's registered IPv6 or IPv4 home address
and home_agent is the IPv6 or the IPv4 address of the home agent.
_______________________________________________
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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I am now happy with -14. I would like at least a few acknowledgments
from the WG members that they too are happy.

Jari

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Date: Thu, 17 Apr 2008 09:49:36 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Jari Arkko" <jari.arkko@piuha.net>
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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I think the draft is generally OK.

Given the discussion we just had, however, the draft does not describe
at all what the MN is supposed to do with the information received. If
there are restrictions in terms of what the MN is supposed to do e.g.,
can not create an address out of the HNP, then that should be
indicated. I have to admit though that I am not sure why such
restrictions would be necessary, so being silent on the issue is OK
with me.

One more thing. Do you think that the relationship between the HA
information received and the link on which the MN is attached is
always clear? Would it be useful to say something about detecting
whether the HA information returned corresponds to an HA "on-link" wrt
to the requesting MN? e.g., the MN can compare the HNP received from
DHCP with the prefixes in the RA received on link, or instead an
explicit indication maybe included in the DHCP message when that is
the case..
Note that the MN may request for HA info of a specific MSP without
realizing that it is already connected to it.

Thanks
George

On Thu, Apr 17, 2008 at 9:25 AM, Jari Arkko <jari.arkko@piuha.net> wrote:
> I am now happy with -14. I would like at least a few acknowledgments
>  from the WG members that they too are happy.
>
>
>
>  Jari
>
>  _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
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MEXT@ietf.org
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George,

> If
> there are restrictions in terms of what the MN is supposed to do e.g.,
> can not create an address out of the HNP, then that should be
> indicated. I have to admit though that I am not sure why such
> restrictions would be necessary, so being silent on the issue is OK
> with me.
>   

Section 3.3 does say that the prefix info is for dynamic discovery only.
Are you missing some other specific information?

> One more thing. Do you think that the relationship between the HA
> information received and the link on which the MN is attached is
> always clear? Would it be useful to say something about detecting
> whether the HA information returned corresponds to an HA "on-link" wrt
> to the requesting MN? e.g., the MN can compare the HNP received from
> DHCP with the prefixes in the RA received on link, or instead an
> explicit indication maybe included in the DHCP message when that is
> the case..
> Note that the MN may request for HA info of a specific MSP without
> realizing that it is already connected to it.
>   

Having DHCP indicate too much of what the mobile node should do with the
information would probably lead into problems. Mobile nodes have to be
able to deal with these things, with or without discovery, because they
can have multiple interfaces.

(I wouldn't mind if some additional clarifying text were added because
of the above.)

Jari


_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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OK, I earlier missed the text in section 3.3.
Thanks
George

On Thu, Apr 17, 2008 at 10:16 AM, Jari Arkko <jari.arkko@piuha.net> wrote:
> George,
>
>
>  > If
>  > there are restrictions in terms of what the MN is supposed to do e.g.,
>  > can not create an address out of the HNP, then that should be
>  > indicated. I have to admit though that I am not sure why such
>  > restrictions would be necessary, so being silent on the issue is OK
>  > with me.
>  >
>
>  Section 3.3 does say that the prefix info is for dynamic discovery only.
>  Are you missing some other specific information?
>
>
>  > One more thing. Do you think that the relationship between the HA
>  > information received and the link on which the MN is attached is
>  > always clear? Would it be useful to say something about detecting
>  > whether the HA information returned corresponds to an HA "on-link" wrt
>  > to the requesting MN? e.g., the MN can compare the HNP received from
>  > DHCP with the prefixes in the RA received on link, or instead an
>  > explicit indication maybe included in the DHCP message when that is
>  > the case..
>  > Note that the MN may request for HA info of a specific MSP without
>  > realizing that it is already connected to it.
>  >
>
>  Having DHCP indicate too much of what the mobile node should do with the
>  information would probably lead into problems. Mobile nodes have to be
>  able to deal with these things, with or without discovery, because they
>  can have multiple interfaces.
>
>  (I wouldn't mind if some additional clarifying text were added because
>  of the above.)
>
>  Jari
>
>
>
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Jari, George,

> (I wouldn't mind if some additional clarifying text were 
> added because of the above.)

Would the following change be acceptable:

Old text:
Note that the provided prefix information MUST be used for
   the dynamic home agent discovery only. 

New text:
Note that the provided prefix information MUST be used only for
   the dynamic home agent discovery and home link detection.

domagoj


> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Jari Arkko
> Sent: 17. travanj 2008 11:16
> To: George Tsirtsis
> Cc: mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> George,
> 
> > If
> > there are restrictions in terms of what the MN is supposed 
> to do e.g., 
> > can not create an address out of the HNP, then that should be 
> > indicated. I have to admit though that I am not sure why such 
> > restrictions would be necessary, so being silent on the issue is OK 
> > with me.
> >   
> 
> Section 3.3 does say that the prefix info is for dynamic 
> discovery only.
> Are you missing some other specific information?
> 
> > One more thing. Do you think that the relationship between the HA 
> > information received and the link on which the MN is attached is 
> > always clear? Would it be useful to say something about detecting 
> > whether the HA information returned corresponds to an HA 
> "on-link" wrt 
> > to the requesting MN? e.g., the MN can compare the HNP 
> received from 
> > DHCP with the prefixes in the RA received on link, or instead an 
> > explicit indication maybe included in the DHCP message when that is 
> > the case..
> > Note that the MN may request for HA info of a specific MSP without 
> > realizing that it is already connected to it.
> >   
> 
> Having DHCP indicate too much of what the mobile node should 
> do with the information would probably lead into problems. 
> Mobile nodes have to be able to deal with these things, with 
> or without discovery, because they can have multiple interfaces.
> 
> (I wouldn't mind if some additional clarifying text were 
> added because of the above.)
> 
> Jari
> 
> 
> _______________________________________________
> MEXT mailing list
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Date: Thu, 17 Apr 2008 11:04:54 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Premec, Domagoj" <domagoj.premec@siemens.com>
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Cc: mext@ietf.org
Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Sorry, I was not going to say anything but the truth is that I do not
like this MUST statement. I would rephrase with something like this:

"The prefix information is provided so that the mobile node can
perform dynamic home agent discovery as defined in RFC3775. The
information may also be used to allow the mobile node to determine
whether the home agent information received via DHCPv6 corresponds to
a home agent on-link or not."

Regards
George

On Thu, Apr 17, 2008 at 10:51 AM, Premec, Domagoj
<domagoj.premec@siemens.com> wrote:
> Jari, George,
>
>
>  > (I wouldn't mind if some additional clarifying text were
>  > added because of the above.)
>
>  Would the following change be acceptable:
>
>  Old text:
>  Note that the provided prefix information MUST be used for
>    the dynamic home agent discovery only.
>
>  New text:
>  Note that the provided prefix information MUST be used only for
>    the dynamic home agent discovery and home link detection.
>
>
>  domagoj
>
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>  > Behalf Of Jari Arkko
>
> > Sent: 17. travanj 2008 11:16
>  > To: George Tsirtsis
>  > Cc: mext@ietf.org
>  > Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
>  >
>
>
> > George,
>  >
>  > > If
>  > > there are restrictions in terms of what the MN is supposed
>  > to do e.g.,
>  > > can not create an address out of the HNP, then that should be
>  > > indicated. I have to admit though that I am not sure why such
>  > > restrictions would be necessary, so being silent on the issue is OK
>  > > with me.
>  > >
>  >
>  > Section 3.3 does say that the prefix info is for dynamic
>  > discovery only.
>  > Are you missing some other specific information?
>  >
>  > > One more thing. Do you think that the relationship between the HA
>  > > information received and the link on which the MN is attached is
>  > > always clear? Would it be useful to say something about detecting
>  > > whether the HA information returned corresponds to an HA
>  > "on-link" wrt
>  > > to the requesting MN? e.g., the MN can compare the HNP
>  > received from
>  > > DHCP with the prefixes in the RA received on link, or instead an
>  > > explicit indication maybe included in the DHCP message when that is
>  > > the case..
>  > > Note that the MN may request for HA info of a specific MSP without
>  > > realizing that it is already connected to it.
>  > >
>  >
>  > Having DHCP indicate too much of what the mobile node should
>  > do with the information would probably lead into problems.
>  > Mobile nodes have to be able to deal with these things, with
>  > or without discovery, because they can have multiple interfaces.
>  >
>  > (I wouldn't mind if some additional clarifying text were
>  > added because of the above.)
>  >
>  > Jari
>  >
>  >
>
>
> > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>  >
>
_______________________________________________
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I like this text...

Jari

George Tsirtsis kirjoitti:
> Sorry, I was not going to say anything but the truth is that I do not
> like this MUST statement. I would rephrase with something like this:
>
> "The prefix information is provided so that the mobile node can
> perform dynamic home agent discovery as defined in RFC3775. The
> information may also be used to allow the mobile node to determine
> whether the home agent information received via DHCPv6 corresponds to
> a home agent on-link or not."
>
> Regards
> George
>
> On Thu, Apr 17, 2008 at 10:51 AM, Premec, Domagoj
> <domagoj.premec@siemens.com> wrote:
>   
>> Jari, George,
>>
>>
>>  > (I wouldn't mind if some additional clarifying text were
>>  > added because of the above.)
>>
>>  Would the following change be acceptable:
>>
>>  Old text:
>>  Note that the provided prefix information MUST be used for
>>    the dynamic home agent discovery only.
>>
>>  New text:
>>  Note that the provided prefix information MUST be used only for
>>    the dynamic home agent discovery and home link detection.
>>
>>
>>  domagoj
>>
>>
>>  > -----Original Message-----
>>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>>  > Behalf Of Jari Arkko
>>
>>     
>>> Sent: 17. travanj 2008 11:16
>>>       
>>  > To: George Tsirtsis
>>  > Cc: mext@ietf.org
>>  > Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
>>  >
>>
>>
>>     
>>> George,
>>>       
>>  >
>>  > > If
>>  > > there are restrictions in terms of what the MN is supposed
>>  > to do e.g.,
>>  > > can not create an address out of the HNP, then that should be
>>  > > indicated. I have to admit though that I am not sure why such
>>  > > restrictions would be necessary, so being silent on the issue is OK
>>  > > with me.
>>  > >
>>  >
>>  > Section 3.3 does say that the prefix info is for dynamic
>>  > discovery only.
>>  > Are you missing some other specific information?
>>  >
>>  > > One more thing. Do you think that the relationship between the HA
>>  > > information received and the link on which the MN is attached is
>>  > > always clear? Would it be useful to say something about detecting
>>  > > whether the HA information returned corresponds to an HA
>>  > "on-link" wrt
>>  > > to the requesting MN? e.g., the MN can compare the HNP
>>  > received from
>>  > > DHCP with the prefixes in the RA received on link, or instead an
>>  > > explicit indication maybe included in the DHCP message when that is
>>  > > the case..
>>  > > Note that the MN may request for HA info of a specific MSP without
>>  > > realizing that it is already connected to it.
>>  > >
>>  >
>>  > Having DHCP indicate too much of what the mobile node should
>>  > do with the information would probably lead into problems.
>>  > Mobile nodes have to be able to deal with these things, with
>>  > or without discovery, because they can have multiple interfaces.
>>  >
>>  > (I wouldn't mind if some additional clarifying text were
>>  > added because of the above.)
>>  >
>>  > Jari
>>  >
>>  >
>>
>>
>>     
>>> _______________________________________________
>>>       
>>  > MEXT mailing list
>>  > MEXT@ietf.org
>>  > https://www.ietf.org/mailman/listinfo/mext
>>  >
>>
>>     
>
>
>   

_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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From: "Premec, Domagoj" <domagoj.premec@siemens.com>
To: "Jari Arkko" <jari.arkko@piuha.net>,
	"George Tsirtsis" <tsirtsis@googlemail.com>
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That's fine by me, too...
domagoj
 

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: 17. travanj 2008 12:07
> To: George Tsirtsis
> Cc: Premec, Domagoj; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> I like this text...
> 
> Jari
> 
> George Tsirtsis kirjoitti:
> > Sorry, I was not going to say anything but the truth is 
> that I do not 
> > like this MUST statement. I would rephrase with something like this:
> >
> > "The prefix information is provided so that the mobile node can 
> > perform dynamic home agent discovery as defined in RFC3775. The 
> > information may also be used to allow the mobile node to determine 
> > whether the home agent information received via DHCPv6 
> corresponds to 
> > a home agent on-link or not."
> >
> > Regards
> > George
> >
> > On Thu, Apr 17, 2008 at 10:51 AM, Premec, Domagoj 
> > <domagoj.premec@siemens.com> wrote:
> >   
> >> Jari, George,
> >>
> >>
> >>  > (I wouldn't mind if some additional clarifying text 
> were  > added 
> >> because of the above.)
> >>
> >>  Would the following change be acceptable:
> >>
> >>  Old text:
> >>  Note that the provided prefix information MUST be used for
> >>    the dynamic home agent discovery only.
> >>
> >>  New text:
> >>  Note that the provided prefix information MUST be used only for
> >>    the dynamic home agent discovery and home link detection.
> >>
> >>
> >>  domagoj
> >>
> >>
> >>  > -----Original Message-----
> >>  > From: mext-bounces@ietf.org 
> [mailto:mext-bounces@ietf.org] On  > 
> >> Behalf Of Jari Arkko
> >>
> >>     
> >>> Sent: 17. travanj 2008 11:16
> >>>       
> >>  > To: George Tsirtsis
> >>  > Cc: mext@ietf.org
> >>  > Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13  >
> >>
> >>
> >>     
> >>> George,
> >>>       
> >>  >
> >>  > > If
> >>  > > there are restrictions in terms of what the MN is supposed
> >>  > to do e.g.,
> >>  > > can not create an address out of the HNP, then that should be
> >>  > > indicated. I have to admit though that I am not sure why such
> >>  > > restrictions would be necessary, so being silent on 
> the issue is OK
> >>  > > with me.
> >>  > >
> >>  >
> >>  > Section 3.3 does say that the prefix info is for dynamic
> >>  > discovery only.
> >>  > Are you missing some other specific information?
> >>  >
> >>  > > One more thing. Do you think that the relationship 
> between the HA
> >>  > > information received and the link on which the MN is 
> attached is
> >>  > > always clear? Would it be useful to say something 
> about detecting
> >>  > > whether the HA information returned corresponds to an HA
> >>  > "on-link" wrt
> >>  > > to the requesting MN? e.g., the MN can compare the HNP
> >>  > received from
> >>  > > DHCP with the prefixes in the RA received on link, or 
> instead an
> >>  > > explicit indication maybe included in the DHCP 
> message when that is
> >>  > > the case..
> >>  > > Note that the MN may request for HA info of a 
> specific MSP without
> >>  > > realizing that it is already connected to it.
> >>  > >
> >>  >
> >>  > Having DHCP indicate too much of what the mobile node should
> >>  > do with the information would probably lead into problems.
> >>  > Mobile nodes have to be able to deal with these things, with
> >>  > or without discovery, because they can have multiple interfaces.
> >>  >
> >>  > (I wouldn't mind if some additional clarifying text were
> >>  > added because of the above.)
> >>  >
> >>  > Jari
> >>  >
> >>  >
> >>
> >>
> >>     
> >>> _______________________________________________
> >>>       
> >>  > MEXT mailing list
> >>  > MEXT@ietf.org
> >>  > https://www.ietf.org/mailman/listinfo/mext
> >>  >
> >>
> >>     
> >
> >
> >   
> 
> 
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From mext-bounces@ietf.org  Thu Apr 17 04:27:05 2008
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From: "QIU Ying" <qiuying@i2r.a-star.edu.sg>
To: "Suresh Krishnan" <suresh.krishnan@ericsson.com>,
	"marcelo bagnulo" <marcelo@it.uc3m.es>,
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Hi, folks

It seems it is time to update the firewall drafts. My suggestions is below:

Regarding vendor draft:
I agree with Henrik comments: the time out of 420 seconds (7 minutes) is to=
o =

long for the binging update signal processing. The pinholes for the mobilit=
y =

head type 1~6 (HoTI/HoT, CoTI/CoT, BU/BA) are no longer necessary when they =

get the return messages (HoT, CoT, BA), respectively. So 30 seconds should =

be enough. But as for the pinhole for data packets, it is necessary to =

associate its lifetime to the ones of a binding cache entry.  Hence, the =

last sentence in section 4 could move to the end of section 5.

Regarding admin draft:
The section 4.2 and 6.3 are talking about IKE negotiation. It is the generi=
c =

security issue. So these sections could be removed from the document.

Section 5.5 deals with the tunneled issue between 2 fixed IP addresses (HA =

and CN). So it should be removed, too.

There are some minor editor errors in the draft:
In section 6.2, please change the sentence =93described in section 5.1=94 t=
o =

=93described in section 4.1=94
In Figure 1, please change =93Home Agent of A=94 to =93Home Agent=94.
In figure 2, please change =93CN C=94 to =93CN=94.

Regards
Qiu Ying


------------ Institute For Infocomm Research - Disclaimer -------------This=
 email is confidential and may be privileged.  If you are not the intended =
recipient, please delete it and notify us immediately. Please do not copy o=
r use it for any purpose, or disclose its contents to any other person. Tha=
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From mext-bounces@ietf.org  Thu Apr 17 05:39:03 2008
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From: "Suresh Krishnan" <suresh.krishnan@ericsson.com>
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	"marcelo bagnulo" <marcelo@it.uc3m.es>,
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Hi Qiu,
  I am already in the process of updating the drafts and I am just
waiting for comments frm the co-authors before I submit a new revision.
Please see comments inline.

> -----Original Message-----
> From: QIU Ying [mailto:qiuying@i2r.a-star.edu.sg] 
> Sent: April-17-08 7:26 AM
> To: Suresh Krishnan; marcelo bagnulo; Julien Laganier; mext
> Subject: update firewall drafts
> 
> Hi, folks
> 
> It seems it is time to update the firewall drafts. My 
> suggestions is below:
> 
> Regarding vendor draft:
> I agree with Henrik comments: the time out of 420 seconds (7 
> minutes) is too long for the binging update signal 
> processing. The pinholes for the mobility head type 1~6 
> (HoTI/HoT, CoTI/CoT, BU/BA) are no longer necessary when they 
> get the return messages (HoT, CoT, BA), respectively. So 30 
> seconds should be enough. But as for the pinhole for data 
> packets, it is necessary to associate its lifetime to the 
> ones of a binding cache entry.  Hence, the last sentence in 
> section 4 could move to the end of section 5.

I have added a configurable interval for this pinhole. I have no issues
setting different lifetimes for different messages as Henrik suggested.
The issue is to agree on reasonable defaults.

> 
> Regarding admin draft:
> The section 4.2 and 6.3 are talking about IKE negotiation. It 
> is the generic security issue. So these sections could be 
> removed from the document.

I am not sure about this. This is not a generic security issue . This
IKE signaling is opened up explicitly for MIPv6 to work. I would
personally prefer to keep this in the document, but I am willing to be
convinced otherwise.

> 
> Section 5.5 deals with the tunneled issue between 2 fixed IP 
> addresses (HA and CN). So it should be removed, too.

I have removed this in the new revision. I have also removed section
4.3. Please check if this is OK with you.

> 
> There are some minor editor errors in the draft:
> In section 6.2, please change the sentence "described in 
> section 5.1" to "described in section 4.1"
> In Figure 1, please change "Home Agent of A" to "Home Agent".
> In figure 2, please change "CN C" to "CN".

OK.

Thanks
Suresh
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Hi, Suresh

Thanks for your updating these drafts. Unfortunately, I have not got them in 
time :-(
Please refer my responses inline.

>----- Original Message ----- 
>From: "Suresh Krishnan" <suresh.krishnan@ericsson.com>


>Hi Qiu,
>  I am already in the process of updating the drafts and I am just
>waiting for comments frm the co-authors before I submit a new revision.
>Please see comments inline.

>> -----Original Message-----
>> From: QIU Ying [mailto:qiuying@i2r.a-star.edu.sg]
>>
>> Regarding vendor draft:
>> I agree with Henrik comments: the time out of 420 seconds (7
>> minutes) is too long for the binging update signal
>> processing. The pinholes for the mobility head type 1~6
>> (HoTI/HoT, CoTI/CoT, BU/BA) are no longer necessary when they
>> get the return messages (HoT, CoT, BA), respectively. So 30
>> seconds should be enough. But as for the pinhole for data
>> packets, it is necessary to associate its lifetime to the
>> ones of a binding cache entry.  Hence, the last sentence in
>> section 4 could move to the end of section 5.

>I have added a configurable interval for this pinhole. I have no issues
>setting different lifetimes for different messages as Henrik suggested.
>The issue is to agree on reasonable defaults.

I noted that you introduce a parameter STATEFUL_PINHOLE_LIFETIME and I am 
sure that it should be employed to all dynamic pinholes. But we know the 
pinholes for the binding update signalling are just used one time, after 
passing HoTI/HoT, CoTI/CoT, BU/BA, these pinholes are not used anymore until 
next update (when the location and CoA might be changed).  Meanwhile the 
pinholes for data packet should be open during the communication. Moreover, 
the more pinholes are opened, the weaker the firewall is.

>> Regarding admin draft:
>> The section 4.2 and 6.3 are talking about IKE negotiation. It
>> is the generic security issue. So these sections could be
>> removed from the document.
>
>I am not sure about this. This is not a generic security issue . This
>IKE signaling is opened up explicitly for MIPv6 to work. I would
>personally prefer to keep this in the document, but I am willing to be
>convinced otherwise.

The pattern the draft suggested is also suitable for the normal IPv6 
scenarios which IKE is used. Of course, in MIP6 network, we can not ignore 
IKE issue. So, to be or not to be?

>> Section 5.5 deals with the tunneled issue between 2 fixed IP
>> addresses (HA and CN). So it should be removed, too.
>
>I have removed this in the new revision. I have also removed section
>4.3. Please check if this is OK with you.

That's fine for me.

Regards
Qiu Ying

>> There are some minor editor errors in the draft:
>> In section 6.2, please change the sentence "described in
>> section 5.1" to "described in section 4.1"
>> In Figure 1, please change "Home Agent of A" to "Home Agent".
>> In figure 2, please change "CN C" to "CN".
>
>OK.
>
>Thanks
>Suresh


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Hi Qiu,
  Thanks for your comments. I am removing the issues we agree on.

> I noted that you introduce a parameter 
> STATEFUL_PINHOLE_LIFETIME and I am 
> sure that it should be employed to all dynamic pinholes. But 
> we know the 
> pinholes for the binding update signalling are just used one 
> time, after 
> passing HoTI/HoT, CoTI/CoT, BU/BA, these pinholes are not 
> used anymore until 
> next update (when the location and CoA might be changed).  
> Meanwhile the 
> pinholes for data packet should be open during the 
> communication. Moreover, 
> the more pinholes are opened, the weaker the firewall is.

I can try to add text which mentions that the pinhole opened for the
CoT, HoT and the BA must be closed after the expected messages pass
through. The issue I see is that retransmissions due to loss will not
get through. Let me know how you want to proceed with this issue.

> 
> >> Regarding admin draft:
> >> The section 4.2 and 6.3 are talking about IKE negotiation. It
> >> is the generic security issue. So these sections could be
> >> removed from the document.
> >
> >I am not sure about this. This is not a generic security issue . This
> >IKE signaling is opened up explicitly for MIPv6 to work. I would
> >personally prefer to keep this in the document, but I am 
> willing to be
> >convinced otherwise.
> 
> The pattern the draft suggested is also suitable for the normal IPv6 
> scenarios which IKE is used. Of course, in MIP6 network, we 
> can not ignore 
> IKE issue. So, to be or not to be?

I will leave this in there for now unless someone has a strong reason
for this to be removed. 

Thanks
Suresh
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Subject: Re: [MEXT] update firewall drafts
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Hi, Suresh

>I can try to add text which mentions that the pinhole opened for the
>CoT, HoT and the BA must be closed after the expected messages pass
>through. The issue I see is that retransmissions due to loss will not
>get through. Let me know how you want to proceed with this issue.

My opinion is: if MN can not receive the return messages (HoT, CoT, BA) 
after timeout, it should resend initial messages (HoTI, CoTI and BU) and let 
firewall to open these pinholes again because only initiator (MN here) can 
know if the round signaling is finished. It is not reasonable to let 
firewall to check the statuses due to overhead.

Regards
QIu Ying


----- Original Message ----- 
From: "Suresh Krishnan" <suresh.krishnan@ericsson.com>
To: "QIU Ying" <qiuying@i2r.a-star.edu.sg>; "marcelo bagnulo" 
<marcelo@it.uc3m.es>; "Julien Laganier" <julien.IETF@laposte.net>; "mext" 
<mext@ietf.org>
Sent: Friday, April 18, 2008 1:19 PM
Subject: RE: update firewall drafts


Hi Qiu,
  Thanks for your comments. I am removing the issues we agree on.

> I noted that you introduce a parameter
> STATEFUL_PINHOLE_LIFETIME and I am
> sure that it should be employed to all dynamic pinholes. But
> we know the
> pinholes for the binding update signalling are just used one
> time, after
> passing HoTI/HoT, CoTI/CoT, BU/BA, these pinholes are not
> used anymore until
> next update (when the location and CoA might be changed).
> Meanwhile the
> pinholes for data packet should be open during the
> communication. Moreover,
> the more pinholes are opened, the weaker the firewall is.

I can try to add text which mentions that the pinhole opened for the
CoT, HoT and the BA must be closed after the expected messages pass
through. The issue I see is that retransmissions due to loss will not
get through. Let me know how you want to proceed with this issue.

>
> >> Regarding admin draft:
> >> The section 4.2 and 6.3 are talking about IKE negotiation. It
> >> is the generic security issue. So these sections could be
> >> removed from the document.
> >
> >I am not sure about this. This is not a generic security issue . This
> >IKE signaling is opened up explicitly for MIPv6 to work. I would
> >personally prefer to keep this in the document, but I am
> willing to be
> >convinced otherwise.
>
> The pattern the draft suggested is also suitable for the normal IPv6
> scenarios which IKE is used. Of course, in MIP6 network, we
> can not ignore
> IKE issue. So, to be or not to be?

I will leave this in there for now unless someone has a strong reason
for this to be removed.

Thanks
Suresh 


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Hi George,

At Wed, 16 Apr 2008 10:19:56 +0100,
George Tsirtsis wrote:
> 
> Hi Ryuji,
> 
> I think what you propose wrt de-registration BU with H-flag set,
> works. I have a slight preference in viewing this as a registration
> but my preference is based on semantics and I do not think it
> technically impacts the solution.

great to have agreement:-)

> For this reason I say that we go with your proposal, so after fixing
> the final set of minor comments I think you should publish the draft.
> Time for a proper WGLC ...at least from my side :-)

OK, I will work on your comments and will submit it to IETF unless
there are more comments from the MEXT group.

regards,
ryuji

> Regards
> George
> 
> On Wed, Apr 16, 2008 at 10:05 AM, Ryuji Wakikawa
> <ryuji.wakikawa@gmail.com> wrote:
> > Hi George,
> >
> >
> >  On 2008/04/16, at 18:00, George Tsirtsis wrote:
> >
> > > Hi Ryuji,
> > >
> > > Yes, most of my comments are now minor so, good job!.
> > >
> >
> >  Great! thanks.
> >
> >
> >
> > > The only issue that bothers me a little is whether the BU with H flag
> > > set over the home link should be viewed as registration or
> > > de-registration. I think either way works, but I need to think this
> > > through just in case there is some implication that we do not see at
> > > the moment.
> > >
> >
> >  OK, please find my comments inline.
> >
> >
> >
> >
> > > See some comments inline.
> > >
> > > Regards
> > > George
> > >
> > > 2008/4/16 Ryuji Wakikawa <ryuji.wakikawa@gmail.com>:
> > >
> > > > Hello George,
> > > >
> > > > Thanks for comments!
> > > >
> > > > It looks like your comments are more editorial one.
> > > > Can I assume you mostly agree on the changes?
> > > > I will revise the document quickly and post it again to MEXT.
> > > >
> > > >
> > > >
> > > > On 2008/04/15, at 21:29, George Tsirtsis wrote:
> > > >
> > > ..
> > >
> > > >
> > > >
> > > > >
> > > > >
> > > > >
> > > > >                   1                   2                   3
> > > > >     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
> > > > >                                    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > > > >                                    |   Type = TBD  |     Length    |
> > > > >    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > > > >    +                                                               +
> > > > >    :                        Link Layer address                     :
> > > > >    +                                                               +
> > > > >    +---------------------------------------------------------------+
> > > > >
> > > > >                    Figure 6: BID Mobility Option
> > > > >
> > > > >
> > > > > GT> Figure caption seems wrong. Also, has such option never been
> > > > > defined for MIPv6 before? I see that PMIPv6 draft also defined the
> > > > > same option. I would hope that only one such option is needed for all
> > > > > flavors of MIPv6?
> > > > >
> > > > >
> > > >
> > > > Do you mean the interface identifier option of PMIP6?
> > > > If that interface identifier is always LL address, we will reuse that
> > > > option.
> > > > Or we can overwrite the sub-option spec. to carry the LL address always
> > for
> > > > MCoA in this spec.
> > > > I will discuss this with Sri.
> > > >
> > > >
> > > >
> > >
> > > GT2> Yes, I think it would be nice to coordinate with Sri, but  I am
> > > not sure what you mean by "we can overwrite the sub-option spec...."
> > >
> >
> >  I mean the MCoA spec clearly states to carry only LL address in this
> > option.
> >
> >
> >
> > >
> > > >
> > > > >
> > > > >
> > > > > [Sending Deregistration Binding Update]
> > > > >
> > > > >
> > > > > o  As soon as a mobile node returns home, it sends a de-registration
> > > > >   Binding Update to the home agent from the interface attached to
> > > > >   the home link.
> > > > >
> > > > > GT> I think throughout the description of this mode of operation the
> > > > > MN sends a *registration* not a *de-registration*. In fact you should
> > > > > add somewhere that "A BU with H flag set MUST have a non-zero
> > > > > Lifetime"
> > > > >
> > > > >
> > > >
> > > > I think MN can use the zero lifetime and de-register the BU.
> > > > MN continues setting the H flag for BUs to other interfaces attached to
> > > > foreign link,
> > > > because MN attached to both foreign and home link.
> > > >
> > > > MN sends BU from the interface attached to the home link just once.
> > > > After that BU, MN sends BU with H flag set from the other interfaces
> > while
> > > > it is at home link.
> > > >
> > > > MN should not send BU from the home link multiple times..
> > > > That's why we said dregistration BU here.
> > > >
> > > > What do you think?
> > > >
> > > >
> > >
> > > GT2> Hmmm, I guess that could work too. Let's think about this a
> > > minute. The way you are thinking about this, can the MN send a BU over
> > > a foreign link with the H flag set, without having send the dereg BU
> > > with H flag set first?
> > >
> >
> >  MN sends only one dereg-BU with H flag set and zero lifetime to HA from the
> > home link.
> >
> >  After that deregistration, MN sends BU with H flag set from the foreign
> > link to HA.
> >  This tells HA that MN is still at the home link.
> >  Once MN leaves from the home link, MN unset the H flag in BU so that HA can
> > detect the MN's leaving.
> >
> >
> >
> > >
> > > >
> > > > > o  According to [RFC-3775], the mobile node MUST start responding to
> > > > >   Neighbor Solicitation for its home address right after it sends
> > > > >
> > > > >
> > > > >
> > > > > Wakikawa (Editor), et al.  Expires October 17, 2008            [Page
> > 22]
> > > > >
> > > > > Internet-Draft                    MCoA                        April
> > 2008
> > > > >
> > > > >
> > > > >   the deregistration Binding Update to the home agent.  However, in
> > > > >   this specification, the mobile node MUST NOT respond to Neighbor
> > > > >   Solicitation before receiving a Binding Acknowledgement, since the
> > > > >   home agent may continue proxying for the home address.
> > > > >
> > > > > GT> the MN must not respond to NS messages before and *after*
> > > > > receiving the BA, right?
> > > > >
> > > > >
> > > >
> > > > This isn't such clear.
> > > > If HA returns [MCOARETURNHOME WO/NDP], MN MUST NOT respond to NS after
> > the
> > > > BA.
> > > > Otherwise, MN should answer to NS.
> > > >
> > > >
> > > >
> > >
> > > GT2> OK, some clarification maybe useful to indicate that what happens
> > > after the BA depends on how the HA responds i.e., the BA's status
> > > field.
> > >
> >
> >
> >  Right. I will update this.
> >
> >  regards,
> >  ryuji
> >
> >
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From: "Alper Yegin" <alper.yegin@yegin.org>
To: "'George Tsirtsis'" <tsirtsis@googlemail.com>,
	"'Jari Arkko'" <jari.arkko@piuha.net>
Date: Fri, 18 Apr 2008 15:50:30 +0300
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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> One more thing. Do you think that the relationship between the HA
> information received and the link on which the MN is attached is
> always clear? Would it be useful to say something about detecting
> whether the HA information returned corresponds to an HA "on-link" wrt
> to the requesting MN? e.g., the MN can compare the HNP received from
> DHCP with the prefixes in the RA received on link, or instead an
> explicit indication maybe included in the DHCP message when that is
> the case..


This requires the DHCP server to be aware of the prefix(es) advertised on the access link. And it may not be.

I think it is best if we leave that to the MN to figure out, as usual.

Alper


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Date: Sat, 19 Apr 2008 08:13:11 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: "Alper Yegin" <alper.yegin@yegin.org>, "Jari Arkko" <jari.arkko@piuha.net>,
	"=?UTF-8?Q?Alfred_=EF=BF=BD?=" <ah@tr-sys.de>, mext@ietf.org
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I do not think the text implies that the DHCP server knows something
speciific about the link.
If the HNP provided by the DHCP server, matches what the MN gets in
the RA onlink, then the MN knows.

George



On 4/18/08, Alper Yegin <alper.yegin@yegin.org> wrote:
> > One more thing. Do you think that the relationship between the HA
> > information received and the link on which the MN is attached is
> > always clear? Would it be useful to say something about detecting
> > whether the HA information returned corresponds to an HA "on-link" wrt
> > to the requesting MN? e.g., the MN can compare the HNP received from
> > DHCP with the prefixes in the RA received on link, or instead an
> > explicit indication maybe included in the DHCP message when that is
> > the case..
>
>
> This requires the DHCP server to be aware of the prefix(es) advertised on
> the access link. And it may not be.
>
> I think it is best if we leave that to the MN to figure out, as usual.
>
> Alper
>
>
>
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From mext-bounces@ietf.org  Sun Apr 20 01:55:39 2008
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Subject: [MEXT] Reminder WGLC on draft-ietf-mext-nemo-mib-00
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Just to remind you that WGLC ends tomorrow

Regards, marcelo


marcelo bagnulo escribi=F3:
> Hi,
>
> We are now starting the WGLC for draft-ietf-mext-nemo-mib-00, which will =

> close on april 21st 2008.
> Please, send comments to the list before that date.
>
> For your convenience, the document can be found:
>
> http://www.ietf.org/internet-drafts/draft-ietf-mext-nemo-mib-00.txt
>
> Regards, Julien and marcelo
>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>
>   =


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From: Heejin Jang <heejin.jang@samsung.com>
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	domagoj.premec@siemens.com
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Subject: [MEXT] Changes in hiopt-15 (from hiopt-14)
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Hi, Jari and folks.

I've posted draft-ietf-mip6-hiopt-15 and changes from -14 are;

1) Afred's comments were reflected.

2) About the description for the home network prefix, I revised 
the texts as George proposed and Jari agreed. That is, 

"   When the Sub-opt-code is set to 2, the Home Network Parameter field
   MUST include the 8-bit Prefix-Len followed by the 128-bit IPv6 Home
   Network Prefix.  The Prefix-Len information indicates the number of
   leading bits in the IPv6 Home Network Prefix that are valid.  The
   prefix information is provided so that the mobile node can perform
   dynamic home agent discovery as defined in [RFC3775].  The
   information may also be used to allow the mobile node to determine
   whether the home agent information received via DHCPv6 corresponds to
   a home agent on-link or not."

- All the best
Heejin

> -----Original Message-----
> From: Jari Arkko [mailto:jari.arkko@piuha.net] 
> Sent: Friday, April 18, 2008 4:43 AM
> To: Alfred  
> Cc: heejin.jang@samsung.com; a.yegin@partner.samsung.com; 
> kchowdhury@starentnetworks.com; jinchoe@samsung.com
> Subject: Re: draft-ietf-mip6-hiopt-14
> 
> I think we still have time to fix this. On list discussion we 
> are converging on a change (you should adopt that, Heejin). 
> And I'm waiting for more people to say "OK" from the WG 
> before proceeding.
> 
> I see a -15 in the near future :-)
> 
> Jari
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The last edits are in -15 now. Any additional people who want to comment
on this before its approved?

Jari

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From: Hesham Soliman <hesham@elevatemobile.com>
To: George Tsirtsis <tsirtsis@googlemail.com>
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Subject: Re: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
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Folks,

Does anyone have any comments on George's proposal below?  Please  
speak now because I want to update the draft and submit ASAP.

Hesham

On 17/04/2008, at 6:21 PM, George Tsirtsis wrote:

> Hi all,
>
> Here is the clarification text for IKEv2/IPSEC and DSMIPv6
> interactions. In particular, the text clarifies the behavior when the
> MN is connected to an IPv4 network, which RFC4877 does not cover.
>
> Thanks to Pasi for his review and his help with defining the required
> SPDs; also thanks to Wassim and Hesham for their review.
> Hesham will fold the following text appropriately into the DSMIPv6
> draft following a hopefully quick review from the group.
>
> Best Regards
> George
> P.S.: I will have intermittent connectivity Friday-Sunday.
>
>
> -----------------------------------------------------------------------------------------------------------------------
> DSMIPv6 defines a number of possible data encapsulations depending on
> the MN's connectivity and MN's and HA's configuration. These
> encapsulations and the signaling required to establish them, are
> straight forward when the MN is connected to an IPv6 capable network.
> Some clarification is, however, needed for IKEv2/IPSEC operations when
> the MN is connected to an IPv4-only network.
>
>
> 1. IKEv2 operation for securing DSMIPv6 Signaling over IPv4
>
> RFC4877 defines how IKEv2 is used for Mobile IPv6 and RFC4306 includes
> information about how IKEv2 runs over IPv4/UDP for NAT Traversal. A
> DSMIPv6 MN connected to an IPv4-only network then,  needs to follow
> the procedures described below.
>
> To establish an SA for the protection of BU/BA messages, the DSMIPv6
> MN and the HA SHOULD implement the following IKEv2 compatible
> procedure:
>
>        Mobile Node                      Home Agent
>        -----------                      ----------
>       IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>        UDP (500, 500) HDR, SAi1, KEi, Ni
>          NAT-D, NAT-D -->
>                            <--    IPv4(source_addr=HAADDR,  
> dest_addr=V4ADDR)
>                                    UDP(500,X) HDR, SAr1, KEr, Nr,  
> [CERTREQ]
>                                               NAT-D, NAT-D
>
>        IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>        UDP (4500,4500) <non-ESP Marker> HDR, SK
>           {IDi, [CERT,] [CERTREQ,] [IDr,] AUTH, SAi2, TSi, TSr}
>                                -->
>
>                              <-- IPv4(source_addr=HAADDR,  
> dest_addr=V4ADDR)
>                                   UDP (4500,Y) <non-ESP Marker>  
> HDR*#, SK
>                                       {IDr, [CERT,] AUTH, SAr2, TSi,  
> TSr}
>
>
> The SPDs are as shown in RFC 4877 Section 7.2.1
>
>       mobile node SPD-S:
>         - IF local_address = home_address_1 &
>              remote_address = home_agent_1 &
>              proto = MH & local_mh_type = BU & remote_mh_type = BAck
>           Then use SA ESP transport mode
>           Initiate using IDi = user_1 to address home_agent_1
>
>       home agent SPD-S:
>         - IF local_address = home_agent_1 &
>              remote_address = home_address_1 &
>              proto = MH & local_mh_type = BAck & remote_mh_type = BU
>           Then use SA ESP transport mode
>
> where home_address_1 is the MN's registered IPv6 home address and
> home_agent_1 is the IP address of the home agent
>
> The above should result in BU/BA messages with the following  
> encapsulations:
>   Binding update received by the home agent:
>  IPv4 header (src=V4ADDR, dst=HA_V4ADDR)
>    UDP header (sport=X, dport=DSMIPv6)
>      IPv6 header (src=V6HOA, dst=HAADDR)
>        ESP Header in Transport Mode
>          Mobility header
>            BU [IPv4 HAO]
>             IPv4 CoA option
> 		   (+ other as needed)
>
>
> At the home agent, following UDP de-tunneling the Binding Update is
> delivered to the IPSEC module as shown below:
>
>       IPv6 header (src=V6HOA, dst=HAADDR)
>         ESP Header in Transport Mode
>           Mobility header
>             BU [IPv4 HAO]
>              IPv4 CoA option
>                (+ other as needed)
>
> The Binding Update following IPSEC processing is delivered to the
> DSMIPv6 home agent module as follows:
>
>       IPv6 header (src=V6HOA, dst=HAADDR)
>         Mobility header
>           BU [IPv4 HAO]
>            IPv4 CoA option
>              (+ other as needed)
>
>
> The Binding Acknowledgement sent by the home agent module to the IPSEC
> module is as follows:
>
>        IPv6 header (src=HAADDR, dst=V6HOA)
>            Mobility Header
>              BA ([IPv4 ACK], NAT DET)
>               (+ other as needed)
>
> The Binding Acknowledgement send by the HA to the MN is as follows:
>
>  IPv4 header (src= HA_V4ADDR, dst=V4ADDR)
>    UDP Header (sport=DSMIPv6, dport=Y)
>       IPv6 header (src=HAADDR, dst=V6HOA)
>         ESP Header in Transport Mode
>           Mobility Header
>             BA ([IPv4 ACK], NAT DET)
>
>
>
> 2. IKEv2 operation for securing DSMIPv6 Data over IPv4
>
> To secure data traffic when the MN is located on an IPv4 only network,
> the MN MUST establish a child_SA for that purpose. The procedure is as
> follows:
>
>        Mobile Node                      Home Agent
>        -----------                      ----------
> UDP (4500,4500) <non-ESP Marker> HDR, SK
>   {[N], SA, Ni, [KEi],[TSi, TSr]}    -->
>
>                                <-- UDP (4500,Y) <non-ESP Marker>  
> HDR, SK
>                                      {SA, Nr, [KEr], [TSi, TSr]}
>
>
> If no NAT is detected, the encapsulation used will be:
>   IPv4 (source_addr=v4CoA, dest_addr=HAAddr)
>     ESP
>      IP (source_addr=HoA, set_addr=CNAddr)
>        Upper_layer_HDR
> where IP=IPv4 or IPv6 and HoA=v4HoA or v6HoA
>
> If NAT is detected, the encapsulation used will be
>   IPv4 (source_addr=v4Addr, dest_addr=HAAddr)
>      UDP (sport=X, dport=4500)
>       ESP
>         IP (source_addr=HoA, set_addr=CNAddr)
>           Upper_layer_HDR
> where v4CoA may be the external IPv4 address of the NAT, IP is either
> IPv4 or IPv6 header and HoA is either the IPv4 or the IPv6 HoA
>
> The SPD for data decryption whether NAT is detected or not is set as
> follows. Note that this rule is designed to match all data from the MN
> to nodes other than the HA. This is done so that this rule does not
> overlap with the earlier rule securing BU/BA signaling between the MN
> and the HA.
>
>      Mobile Node SPD-S:
> 	- IF local_address = home_address &
> 	     remote_address != home_agent &
>           proto=any
> 	  Then use SA ESP tunnel mode
>   	Initiate using IDi = user_1 to address home_agent_1
>
>       home agent SPD-S:
>      - IF local_address != home_agent &
>              remote_address = home_address &
>              proto = any
>        Then use SA ESP tunnel mode
>
> where home_address is the MN's registered IPv6 or IPv4 home address
> and home_agent is the IPv6 or the IPv4 address of the home agent.
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext

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Jari Arkko wrote:
> The last edits are in -15 now. Any additional people who want to 
> comment on this before its approved?

Hi Jari,

I am not familiar with the advancement of this document and the recent
discussion.

I have just quickly skimmed through it.

I am surprised by the intention to pursue the document and get it
approved.  Because I find a few incoherencies.  It may be I'm
not enough familiar with the document, if so my message can be discarded.

For example:
> 3.  DHCP options for HA Dynamic Discovery
> 
> This section introduces new DHCP options and their sub-options which 
> are used for dynamic discovery of the home agent's IPv6 address, IPv6
>  home network prefix,

So the home network prefix is discovered, presumably by MN.

> 3.1.  Home Network Information Option
> 
> This option is proposed to allow the exchange of home network 
> information between the mobile node (DHCP client) and the DHCP 
> server.  It is used to indicate the target home network requested by 
> the mobile node to the DHCP server in the Information-request 
> message.  In the Reply message, it conveys the home network 
> information assigned by the DHCP server to the mobile node.

The MN indicates the home network information to DHCP Server, and then
the DHCP Server indicates back to MN the home network information.  Is
this information the same?  Can it change?

If the MN knows the home network information then why does it need the
DHCP Server to tell it back the home network information?

Is the home network prefix part of the home network information?

> 4.3.  DHCP Server Behavior
> 
> When the server receives a Relay-forward message, it may include the 
> MIP6 Relay Agent option in case there was home information available 
> for the mobile node at the relay.

DHCP Server includes the MIP6 Relay Agent option into what?

Overall comments about some paragraphs:
> New DHCP options are defined which allow a mobile node to request the
>  home agent IP address, FQDN, or home network prefix and obtain it 
> via the DHCP response.

If this is a MN, then it could be a MR, and MR may need to learn Mobile
Network Prefixes.  Is it necessary to learn Mobile Network Prefixes as
well?  Just a question.

> A mobile node can indicate its home network identity when roaming to 
> a visited network in order to obtain the MIP6 bootstrap parameters 
> from the home network.  As an example, the visited network may 
> determine the home network of the mobile node based on the realm 
> portion of the NAI (Network Access Identifier) [RFC4282] used in 
> access authentication.

This is not a good example, it is not a good idea to decide the identity
of a subnet based on the realm part of NAI.  There is no relationship
about domain names and subnet addresses, and there shouldn't be any.  If
one needs to identify a subnet then it's by its IP subnet address, not
by its fqdn (there's no fqdn-subnet relationship).

I haven't read further.

Alex


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>         IP (source_addr=HoA, set_addr=CNAddr)
s/set_addr/dest_addr/
domagoj



> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Hesham Soliman
> Sent: 21. travanj 2008 11:22
> To: George Tsirtsis
> Cc: mext
> Subject: Re: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
> 
> Folks,
> 
> Does anyone have any comments on George's proposal below?  
> Please speak now because I want to update the draft and submit ASAP.
> 
> Hesham
> 
> On 17/04/2008, at 6:21 PM, George Tsirtsis wrote:
> 
> > Hi all,
> >
> > Here is the clarification text for IKEv2/IPSEC and DSMIPv6 
> > interactions. In particular, the text clarifies the 
> behavior when the 
> > MN is connected to an IPv4 network, which RFC4877 does not cover.
> >
> > Thanks to Pasi for his review and his help with defining 
> the required 
> > SPDs; also thanks to Wassim and Hesham for their review.
> > Hesham will fold the following text appropriately into the DSMIPv6 
> > draft following a hopefully quick review from the group.
> >
> > Best Regards
> > George
> > P.S.: I will have intermittent connectivity Friday-Sunday.
> >
> >
> > 
> ----------------------------------------------------------------------
> > -------------------------------------------------
> > DSMIPv6 defines a number of possible data encapsulations 
> depending on 
> > the MN's connectivity and MN's and HA's configuration. These 
> > encapsulations and the signaling required to establish them, are 
> > straight forward when the MN is connected to an IPv6 
> capable network.
> > Some clarification is, however, needed for IKEv2/IPSEC 
> operations when 
> > the MN is connected to an IPv4-only network.
> >
> >
> > 1. IKEv2 operation for securing DSMIPv6 Signaling over IPv4
> >
> > RFC4877 defines how IKEv2 is used for Mobile IPv6 and 
> RFC4306 includes 
> > information about how IKEv2 runs over IPv4/UDP for NAT Traversal. A
> > DSMIPv6 MN connected to an IPv4-only network then,  needs to follow 
> > the procedures described below.
> >
> > To establish an SA for the protection of BU/BA messages, 
> the DSMIPv6 
> > MN and the HA SHOULD implement the following IKEv2 compatible
> > procedure:
> >
> >        Mobile Node                      Home Agent
> >        -----------                      ----------
> >       IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
> >        UDP (500, 500) HDR, SAi1, KEi, Ni
> >          NAT-D, NAT-D -->
> >                            <--    IPv4(source_addr=HAADDR,  
> > dest_addr=V4ADDR)
> >                                    UDP(500,X) HDR, SAr1, KEr, Nr, 
> > [CERTREQ]
> >                                               NAT-D, NAT-D
> >
> >        IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
> >        UDP (4500,4500) <non-ESP Marker> HDR, SK
> >           {IDi, [CERT,] [CERTREQ,] [IDr,] AUTH, SAi2, TSi, TSr}
> >                                -->
> >
> >                              <-- IPv4(source_addr=HAADDR,
> > dest_addr=V4ADDR)
> >                                   UDP (4500,Y) <non-ESP 
> Marker> HDR*#, 
> > SK
> >                                       {IDr, [CERT,] AUTH, 
> SAr2, TSi, 
> > TSr}
> >
> >
> > The SPDs are as shown in RFC 4877 Section 7.2.1
> >
> >       mobile node SPD-S:
> >         - IF local_address = home_address_1 &
> >              remote_address = home_agent_1 &
> >              proto = MH & local_mh_type = BU & remote_mh_type = BAck
> >           Then use SA ESP transport mode
> >           Initiate using IDi = user_1 to address home_agent_1
> >
> >       home agent SPD-S:
> >         - IF local_address = home_agent_1 &
> >              remote_address = home_address_1 &
> >              proto = MH & local_mh_type = BAck & remote_mh_type = BU
> >           Then use SA ESP transport mode
> >
> > where home_address_1 is the MN's registered IPv6 home address and
> > home_agent_1 is the IP address of the home agent
> >
> > The above should result in BU/BA messages with the following
> > encapsulations:
> >   Binding update received by the home agent:
> >  IPv4 header (src=V4ADDR, dst=HA_V4ADDR)
> >    UDP header (sport=X, dport=DSMIPv6)
> >      IPv6 header (src=V6HOA, dst=HAADDR)
> >        ESP Header in Transport Mode
> >          Mobility header
> >            BU [IPv4 HAO]
> >             IPv4 CoA option
> > 		   (+ other as needed)
> >
> >
> > At the home agent, following UDP de-tunneling the Binding Update is
> > delivered to the IPSEC module as shown below:
> >
> >       IPv6 header (src=V6HOA, dst=HAADDR)
> >         ESP Header in Transport Mode
> >           Mobility header
> >             BU [IPv4 HAO]
> >              IPv4 CoA option
> >                (+ other as needed)
> >
> > The Binding Update following IPSEC processing is delivered to the
> > DSMIPv6 home agent module as follows:
> >
> >       IPv6 header (src=V6HOA, dst=HAADDR)
> >         Mobility header
> >           BU [IPv4 HAO]
> >            IPv4 CoA option
> >              (+ other as needed)
> >
> >
> > The Binding Acknowledgement sent by the home agent module 
> to the IPSEC
> > module is as follows:
> >
> >        IPv6 header (src=HAADDR, dst=V6HOA)
> >            Mobility Header
> >              BA ([IPv4 ACK], NAT DET)
> >               (+ other as needed)
> >
> > The Binding Acknowledgement send by the HA to the MN is as follows:
> >
> >  IPv4 header (src= HA_V4ADDR, dst=V4ADDR)
> >    UDP Header (sport=DSMIPv6, dport=Y)
> >       IPv6 header (src=HAADDR, dst=V6HOA)
> >         ESP Header in Transport Mode
> >           Mobility Header
> >             BA ([IPv4 ACK], NAT DET)
> >
> >
> >
> > 2. IKEv2 operation for securing DSMIPv6 Data over IPv4
> >
> > To secure data traffic when the MN is located on an IPv4 
> only network,
> > the MN MUST establish a child_SA for that purpose. The 
> procedure is as
> > follows:
> >
> >        Mobile Node                      Home Agent
> >        -----------                      ----------
> > UDP (4500,4500) <non-ESP Marker> HDR, SK
> >   {[N], SA, Ni, [KEi],[TSi, TSr]}    -->
> >
> >                                <-- UDP (4500,Y) <non-ESP Marker>  
> > HDR, SK
> >                                      {SA, Nr, [KEr], [TSi, TSr]}
> >
> >
> > If no NAT is detected, the encapsulation used will be:
> >   IPv4 (source_addr=v4CoA, dest_addr=HAAddr)
> >     ESP
> >      IP (source_addr=HoA, set_addr=CNAddr)
> >        Upper_layer_HDR
> > where IP=IPv4 or IPv6 and HoA=v4HoA or v6HoA
> >
> > If NAT is detected, the encapsulation used will be
> >   IPv4 (source_addr=v4Addr, dest_addr=HAAddr)
> >      UDP (sport=X, dport=4500)
> >       ESP
> >         IP (source_addr=HoA, set_addr=CNAddr)
> >           Upper_layer_HDR
> > where v4CoA may be the external IPv4 address of the NAT, IP 
> is either
> > IPv4 or IPv6 header and HoA is either the IPv4 or the IPv6 HoA
> >
> > The SPD for data decryption whether NAT is detected or not is set as
> > follows. Note that this rule is designed to match all data 
> from the MN
> > to nodes other than the HA. This is done so that this rule does not
> > overlap with the earlier rule securing BU/BA signaling 
> between the MN
> > and the HA.
> >
> >      Mobile Node SPD-S:
> > 	- IF local_address = home_address &
> > 	     remote_address != home_agent &
> >           proto=any
> > 	  Then use SA ESP tunnel mode
> >   	Initiate using IDi = user_1 to address home_agent_1
> >
> >       home agent SPD-S:
> >      - IF local_address != home_agent &
> >              remote_address = home_address &
> >              proto = any
> >        Then use SA ESP tunnel mode
> >
> > where home_address is the MN's registered IPv6 or IPv4 home address
> > and home_agent is the IPv6 or the IPv4 address of the home agent.
> > _______________________________________________
> > MEXT mailing list
> > MEXT@ietf.org
> > https://www.ietf.org/mailman/listinfo/mext
> 
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Thread-Topic: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
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References: <d3886a520804170121x1601c74pca1d5827e8ae30da@mail.gmail.com>
From: <Christian.Kaas-Petersen@tietoenator.com>
To: <tsirtsis@googlemail.com>,
	<mext@ietf.org>
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Subject: Re: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
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A few comments.

As a result of section 1's IKE exchanges, the NAT box has the mappings

                                       new   new
          src   dst                    src   dst
         ----  ----                   ----  ----
    UDP   500   500    maps to    UDP    X   500
    UDP  4500  4500    maps to    UDP    Y  4500

The following BU and BA packets will then create the mapping

    UDP DSMIP DSMIP    maps to    UDP    Z  DSMIP

calling for a change in the UDP headers of the BU and BA packets.

For section 1's IKE exchanges, the following details might be considered

 * Use N(USE_TRANSPORT_MODE) 
 * Not clear what *# means in HDR*#
 * Have a statement, that the transport CHILD_SA might already have
   been made in the previous foreign network (v4 or v6), or might
   have been made proactively in the home network.  Thus the 
   illustrated exchange is only for the case of a full re-negotiation.
 * Although also used in RFC 4877, the 
   "local_mh_type = BU & remote_mh_type = BAck" cannot be true, as
   as only one MH type is supplied in a BU or BA.  Probably not
   worth to effort to change.

For section 2's IKE exchange, this exchange could also have been made
proactively, and then only require installation when moving to the
foreign IPv4 network.  Thus the illustrated exchange is only for the
case of re-negotiation.

Christian
 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of George Tsirtsis
> Sent: 17. april 2008 10:22
> To: mext
> Subject: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
> 
> Hi all,
> 
> Here is the clarification text for IKEv2/IPSEC and DSMIPv6 
> interactions. In particular, the text clarifies the behavior 
> when the MN is connected to an IPv4 network, which RFC4877 
> does not cover.
> 
> Thanks to Pasi for his review and his help with defining the 
> required SPDs; also thanks to Wassim and Hesham for their review.
> Hesham will fold the following text appropriately into the 
> DSMIPv6 draft following a hopefully quick review from the group.
> 
> Best Regards
> George
> P.S.: I will have intermittent connectivity Friday-Sunday.
> 
> 
> --------------------------------------------------------------
> ---------------------------------------------------------
> DSMIPv6 defines a number of possible data encapsulations 
> depending on the MN's connectivity and MN's and HA's 
> configuration. These encapsulations and the signaling 
> required to establish them, are straight forward when the MN 
> is connected to an IPv6 capable network.
> Some clarification is, however, needed for IKEv2/IPSEC 
> operations when the MN is connected to an IPv4-only network.
> 
> 
> 1. IKEv2 operation for securing DSMIPv6 Signaling over IPv4
> 
> RFC4877 defines how IKEv2 is used for Mobile IPv6 and RFC4306 
> includes information about how IKEv2 runs over IPv4/UDP for 
> NAT Traversal. A
> DSMIPv6 MN connected to an IPv4-only network then,  needs to 
> follow the procedures described below.
> 
> To establish an SA for the protection of BU/BA messages, the 
> DSMIPv6 MN and the HA SHOULD implement the following IKEv2 compatible
> procedure:
> 
>         Mobile Node                      Home Agent
>         -----------                      ----------
>        IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>         UDP (500, 500) HDR, SAi1, KEi, Ni
>           NAT-D, NAT-D -->
>                             <--    IPv4(source_addr=HAADDR, 
> dest_addr=V4ADDR)
>                                     UDP(500,X) HDR, SAr1, 
> KEr, Nr, [CERTREQ]
>                                                NAT-D, NAT-D
> 
>         IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>         UDP (4500,4500) <non-ESP Marker> HDR, SK
>            {IDi, [CERT,] [CERTREQ,] [IDr,] AUTH, SAi2, TSi, TSr}
>                                 -->
> 
>                               <-- IPv4(source_addr=HAADDR, 
> dest_addr=V4ADDR)
>                                    UDP (4500,Y) <non-ESP 
> Marker> HDR*#, SK
>                                        {IDr, [CERT,] AUTH, 
> SAr2, TSi, TSr}
> 
> 
> The SPDs are as shown in RFC 4877 Section 7.2.1
> 
>        mobile node SPD-S:
>          - IF local_address = home_address_1 &
>               remote_address = home_agent_1 &
>               proto = MH & local_mh_type = BU & remote_mh_type = BAck
>            Then use SA ESP transport mode
>            Initiate using IDi = user_1 to address home_agent_1
> 
>        home agent SPD-S:
>          - IF local_address = home_agent_1 &
>               remote_address = home_address_1 &
>               proto = MH & local_mh_type = BAck & remote_mh_type = BU
>            Then use SA ESP transport mode
> 
> where home_address_1 is the MN's registered IPv6 home address and
> home_agent_1 is the IP address of the home agent
> 
> The above should result in BU/BA messages with the following 
> encapsulations:
>    Binding update received by the home agent:
>   IPv4 header (src=V4ADDR, dst=HA_V4ADDR)
>     UDP header (sport=X, dport=DSMIPv6)
>       IPv6 header (src=V6HOA, dst=HAADDR)
>         ESP Header in Transport Mode
>           Mobility header
>             BU [IPv4 HAO]
>              IPv4 CoA option
> 		   (+ other as needed)
> 
> 
> At the home agent, following UDP de-tunneling the Binding 
> Update is delivered to the IPSEC module as shown below:
> 
>        IPv6 header (src=V6HOA, dst=HAADDR)
>          ESP Header in Transport Mode
>            Mobility header
>              BU [IPv4 HAO]
>               IPv4 CoA option
>                 (+ other as needed)
> 
> The Binding Update following IPSEC processing is delivered to the
> DSMIPv6 home agent module as follows:
> 
>        IPv6 header (src=V6HOA, dst=HAADDR)
>          Mobility header
>            BU [IPv4 HAO]
>             IPv4 CoA option
>               (+ other as needed)
> 
> 
> The Binding Acknowledgement sent by the home agent module to 
> the IPSEC module is as follows:
> 
>         IPv6 header (src=HAADDR, dst=V6HOA)
>             Mobility Header
>               BA ([IPv4 ACK], NAT DET)
>                (+ other as needed)
> 
> The Binding Acknowledgement send by the HA to the MN is as follows:
> 
>   IPv4 header (src= HA_V4ADDR, dst=V4ADDR)
>     UDP Header (sport=DSMIPv6, dport=Y)
>        IPv6 header (src=HAADDR, dst=V6HOA)
>          ESP Header in Transport Mode
>            Mobility Header
>              BA ([IPv4 ACK], NAT DET)
> 
> 
> 
> 2. IKEv2 operation for securing DSMIPv6 Data over IPv4
> 
> To secure data traffic when the MN is located on an IPv4 only 
> network, the MN MUST establish a child_SA for that purpose. 
> The procedure is as
> follows:
> 
>         Mobile Node                      Home Agent
>         -----------                      ----------
> UDP (4500,4500) <non-ESP Marker> HDR, SK
>    {[N], SA, Ni, [KEi],[TSi, TSr]}    -->
> 
>                                 <-- UDP (4500,Y) <non-ESP 
> Marker> HDR, SK
>                                       {SA, Nr, [KEr], [TSi, TSr]}
> 
> 
> If no NAT is detected, the encapsulation used will be:
>    IPv4 (source_addr=v4CoA, dest_addr=HAAddr)
>      ESP
>       IP (source_addr=HoA, set_addr=CNAddr)
>         Upper_layer_HDR
> where IP=IPv4 or IPv6 and HoA=v4HoA or v6HoA
> 
> If NAT is detected, the encapsulation used will be
>    IPv4 (source_addr=v4Addr, dest_addr=HAAddr)
>       UDP (sport=X, dport=4500)
>        ESP
>          IP (source_addr=HoA, set_addr=CNAddr)
>            Upper_layer_HDR
> where v4CoA may be the external IPv4 address of the NAT, IP is either
> IPv4 or IPv6 header and HoA is either the IPv4 or the IPv6 HoA
> 
> The SPD for data decryption whether NAT is detected or not is 
> set as follows. Note that this rule is designed to match all 
> data from the MN to nodes other than the HA. This is done so 
> that this rule does not overlap with the earlier rule 
> securing BU/BA signaling between the MN and the HA.
> 
>       Mobile Node SPD-S:
> 	- IF local_address = home_address &
> 	     remote_address != home_agent &
>            proto=any
> 	  Then use SA ESP tunnel mode
>    	Initiate using IDi = user_1 to address home_agent_1
> 
>        home agent SPD-S:
>       - IF local_address != home_agent &
>               remote_address = home_address &
>               proto = any
>         Then use SA ESP tunnel mode
> 
> where home_address is the MN's registered IPv6 or IPv4 home 
> address and home_agent is the IPv6 or the IPv4 address of the 
> home agent.
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Date: Mon, 21 Apr 2008 14:04:57 +0100
From: "George Tsirtsis" <tsirtsis@googlemail.com>
To: Christian.Kaas-Petersen@tietoenator.com
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Subject: Re: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
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Hi Christian,

Thanks for your comments, see inline...

On Mon, Apr 21, 2008 at 1:50 PM,
<Christian.Kaas-Petersen@tietoenator.com> wrote:
> A few comments.
>
>  As a result of section 1's IKE exchanges, the NAT box has the mappings
>
>                                        new   new
>           src   dst                    src   dst
>          ----  ----                   ----  ----
>     UDP   500   500    maps to    UDP    X   500
>     UDP  4500  4500    maps to    UDP    Y  4500
>
>  The following BU and BA packets will then create the mapping
>
>     UDP DSMIP DSMIP    maps to    UDP    Z  DSMIP
>
>  calling for a change in the UDP headers of the BU and BA packets.
>

GT> It is not clear to me if the above is an observation or whether
you are suggesting something specific. I think the text already shows
all this and the fact that the UDP header changes (if NAT exists) does
not affect the IKEv2 SA for the BU/BA.


>  For section 1's IKE exchanges, the following details might be considered
>
>   * Use N(USE_TRANSPORT_MODE)

GT> Use that where? the packet formats already indicate ESP Transport mode.

>   * Not clear what *# means in HDR*#

GT> The notation is used in RFC3947 to indicate a modified header and
I failed to remove it from one place as I copy/pasted text around, so
Hesham should remove the "*#".

>   * Have a statement, that the transport CHILD_SA might already have
>    been made in the previous foreign network (v4 or v6), or might
>    have been made proactively in the home network.  Thus the
>    illustrated exchange is only for the case of a full re-negotiation.

GT> I think you are right, this is worth adding.

>   * Although also used in RFC 4877, the
>    "local_mh_type = BU & remote_mh_type = BAck" cannot be true, as
>    as only one MH type is supplied in a BU or BA.  Probably not
>    worth to effort to change.
>
>  For section 2's IKE exchange, this exchange could also have been made
>  proactively, and then only require installation when moving to the
>  foreign IPv4 network.  Thus the illustrated exchange is only for the
>  case of re-negotiation.
>

GT> Again, I agree.


Thanks
George



>  Christian
>
>
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>
>
> > Behalf Of George Tsirtsis
>  > Sent: 17. april 2008 10:22
>  > To: mext
>  > Subject: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
>  >
>  > Hi all,
>  >
>  > Here is the clarification text for IKEv2/IPSEC and DSMIPv6
>  > interactions. In particular, the text clarifies the behavior
>  > when the MN is connected to an IPv4 network, which RFC4877
>  > does not cover.
>  >
>  > Thanks to Pasi for his review and his help with defining the
>  > required SPDs; also thanks to Wassim and Hesham for their review.
>  > Hesham will fold the following text appropriately into the
>  > DSMIPv6 draft following a hopefully quick review from the group.
>  >
>  > Best Regards
>  > George
>  > P.S.: I will have intermittent connectivity Friday-Sunday.
>  >
>  >
>  > --------------------------------------------------------------
>  > ---------------------------------------------------------
>  > DSMIPv6 defines a number of possible data encapsulations
>  > depending on the MN's connectivity and MN's and HA's
>  > configuration. These encapsulations and the signaling
>  > required to establish them, are straight forward when the MN
>  > is connected to an IPv6 capable network.
>  > Some clarification is, however, needed for IKEv2/IPSEC
>  > operations when the MN is connected to an IPv4-only network.
>  >
>  >
>  > 1. IKEv2 operation for securing DSMIPv6 Signaling over IPv4
>  >
>  > RFC4877 defines how IKEv2 is used for Mobile IPv6 and RFC4306
>  > includes information about how IKEv2 runs over IPv4/UDP for
>  > NAT Traversal. A
>  > DSMIPv6 MN connected to an IPv4-only network then,  needs to
>  > follow the procedures described below.
>  >
>  > To establish an SA for the protection of BU/BA messages, the
>  > DSMIPv6 MN and the HA SHOULD implement the following IKEv2 compatible
>  > procedure:
>  >
>  >         Mobile Node                      Home Agent
>  >         -----------                      ----------
>  >        IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>  >         UDP (500, 500) HDR, SAi1, KEi, Ni
>  >           NAT-D, NAT-D -->
>  >                             <--    IPv4(source_addr=HAADDR,
>  > dest_addr=V4ADDR)
>  >                                     UDP(500,X) HDR, SAr1,
>  > KEr, Nr, [CERTREQ]
>  >                                                NAT-D, NAT-D
>  >
>  >         IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>  >         UDP (4500,4500) <non-ESP Marker> HDR, SK
>  >            {IDi, [CERT,] [CERTREQ,] [IDr,] AUTH, SAi2, TSi, TSr}
>  >                                 -->
>  >
>  >                               <-- IPv4(source_addr=HAADDR,
>  > dest_addr=V4ADDR)
>  >                                    UDP (4500,Y) <non-ESP
>  > Marker> HDR*#, SK
>  >                                        {IDr, [CERT,] AUTH,
>  > SAr2, TSi, TSr}
>  >
>  >
>  > The SPDs are as shown in RFC 4877 Section 7.2.1
>  >
>  >        mobile node SPD-S:
>  >          - IF local_address = home_address_1 &
>  >               remote_address = home_agent_1 &
>  >               proto = MH & local_mh_type = BU & remote_mh_type = BAck
>  >            Then use SA ESP transport mode
>  >            Initiate using IDi = user_1 to address home_agent_1
>  >
>  >        home agent SPD-S:
>  >          - IF local_address = home_agent_1 &
>  >               remote_address = home_address_1 &
>  >               proto = MH & local_mh_type = BAck & remote_mh_type = BU
>  >            Then use SA ESP transport mode
>  >
>  > where home_address_1 is the MN's registered IPv6 home address and
>  > home_agent_1 is the IP address of the home agent
>  >
>  > The above should result in BU/BA messages with the following
>  > encapsulations:
>  >    Binding update received by the home agent:
>  >   IPv4 header (src=V4ADDR, dst=HA_V4ADDR)
>  >     UDP header (sport=X, dport=DSMIPv6)
>  >       IPv6 header (src=V6HOA, dst=HAADDR)
>  >         ESP Header in Transport Mode
>  >           Mobility header
>  >             BU [IPv4 HAO]
>  >              IPv4 CoA option
>  >                  (+ other as needed)
>  >
>  >
>  > At the home agent, following UDP de-tunneling the Binding
>  > Update is delivered to the IPSEC module as shown below:
>  >
>  >        IPv6 header (src=V6HOA, dst=HAADDR)
>  >          ESP Header in Transport Mode
>  >            Mobility header
>  >              BU [IPv4 HAO]
>  >               IPv4 CoA option
>  >                 (+ other as needed)
>  >
>  > The Binding Update following IPSEC processing is delivered to the
>  > DSMIPv6 home agent module as follows:
>  >
>  >        IPv6 header (src=V6HOA, dst=HAADDR)
>  >          Mobility header
>  >            BU [IPv4 HAO]
>  >             IPv4 CoA option
>  >               (+ other as needed)
>  >
>  >
>  > The Binding Acknowledgement sent by the home agent module to
>  > the IPSEC module is as follows:
>  >
>  >         IPv6 header (src=HAADDR, dst=V6HOA)
>  >             Mobility Header
>  >               BA ([IPv4 ACK], NAT DET)
>  >                (+ other as needed)
>  >
>  > The Binding Acknowledgement send by the HA to the MN is as follows:
>  >
>  >   IPv4 header (src= HA_V4ADDR, dst=V4ADDR)
>  >     UDP Header (sport=DSMIPv6, dport=Y)
>  >        IPv6 header (src=HAADDR, dst=V6HOA)
>  >          ESP Header in Transport Mode
>  >            Mobility Header
>  >              BA ([IPv4 ACK], NAT DET)
>  >
>  >
>  >
>  > 2. IKEv2 operation for securing DSMIPv6 Data over IPv4
>  >
>  > To secure data traffic when the MN is located on an IPv4 only
>  > network, the MN MUST establish a child_SA for that purpose.
>  > The procedure is as
>  > follows:
>  >
>  >         Mobile Node                      Home Agent
>  >         -----------                      ----------
>  > UDP (4500,4500) <non-ESP Marker> HDR, SK
>  >    {[N], SA, Ni, [KEi],[TSi, TSr]}    -->
>  >
>  >                                 <-- UDP (4500,Y) <non-ESP
>  > Marker> HDR, SK
>  >                                       {SA, Nr, [KEr], [TSi, TSr]}
>  >
>  >
>  > If no NAT is detected, the encapsulation used will be:
>  >    IPv4 (source_addr=v4CoA, dest_addr=HAAddr)
>  >      ESP
>  >       IP (source_addr=HoA, set_addr=CNAddr)
>  >         Upper_layer_HDR
>  > where IP=IPv4 or IPv6 and HoA=v4HoA or v6HoA
>  >
>  > If NAT is detected, the encapsulation used will be
>  >    IPv4 (source_addr=v4Addr, dest_addr=HAAddr)
>  >       UDP (sport=X, dport=4500)
>  >        ESP
>  >          IP (source_addr=HoA, set_addr=CNAddr)
>  >            Upper_layer_HDR
>  > where v4CoA may be the external IPv4 address of the NAT, IP is either
>  > IPv4 or IPv6 header and HoA is either the IPv4 or the IPv6 HoA
>  >
>  > The SPD for data decryption whether NAT is detected or not is
>  > set as follows. Note that this rule is designed to match all
>  > data from the MN to nodes other than the HA. This is done so
>  > that this rule does not overlap with the earlier rule
>  > securing BU/BA signaling between the MN and the HA.
>  >
>  >       Mobile Node SPD-S:
>  >       - IF local_address = home_address &
>  >            remote_address != home_agent &
>  >            proto=any
>  >         Then use SA ESP tunnel mode
>  >       Initiate using IDi = user_1 to address home_agent_1
>  >
>  >        home agent SPD-S:
>  >       - IF local_address != home_agent &
>  >               remote_address = home_address &
>  >               proto = any
>  >         Then use SA ESP tunnel mode
>  >
>  > where home_address is the MN's registered IPv6 or IPv4 home
>  > address and home_agent is the IPv6 or the IPv4 address of the
>  > home agent.
>
>
> > _______________________________________________
>  > MEXT mailing list
>  > MEXT@ietf.org
>  > https://www.ietf.org/mailman/listinfo/mext
>  >
>
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From mext-bounces@ietf.org  Mon Apr 21 06:24:26 2008
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Thanks.  I have clarified my statements inline.
Christian 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of George Tsirtsis
> Sent: 21. april 2008 15:05
> To: Kaas-Petersen Christian
> Cc: mext@ietf.org
> Subject: Re: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
> 
> Hi Christian,
> 
> Thanks for your comments, see inline...
> 
> On Mon, Apr 21, 2008 at 1:50 PM,
> <Christian.Kaas-Petersen@tietoenator.com> wrote:
> > A few comments.
> >
> >  As a result of section 1's IKE exchanges, the NAT box has the 
> > mappings
> >
> >                                        new   new
> >           src   dst                    src   dst
> >          ----  ----                   ----  ----
> >     UDP   500   500    maps to    UDP    X   500
> >     UDP  4500  4500    maps to    UDP    Y  4500
> >
> >  The following BU and BA packets will then create the mapping
> >
> >     UDP DSMIP DSMIP    maps to    UDP    Z  DSMIP
> >
> >  calling for a change in the UDP headers of the BU and BA packets.
> >
> 
> GT> It is not clear to me if the above is an observation or whether
> you are suggesting something specific. I think the text 
> already shows all this and the fact that the UDP header 
> changes (if NAT exists) does not affect the IKEv2 SA for the BU/BA.
> 

In "1. IKEv2 operation for ..." I read the lines

 (a)   UDP(500,X) HDR, SAr1, KEr, Nr, ...
 (b)   UDP(4500,Y) <non-ESP Marker> HDR*#, SK...
 (c)   UDP header (sport=X, dport=DSMIPv6) ...
 (d)   UDP Header (sport=DSMIPv6, dport=Y)

and I asked myself, is the X in (a) the same X as in (c), and is
the Y in (b) the same as the Y in (d), and I believe
the answer is no (which I tried illustrate in the NAT table),
so I suggest X in (c) replaced by Z and the Y in (d) replaced by Z.


> 
> >  For section 1's IKE exchanges, the following details might be 
> > considered
> >
> >   * Use N(USE_TRANSPORT_MODE)
> 
> GT> Use that where? the packet formats already indicate ESP 
> Transport mode.

Insert, such that

    IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
    UDP (4500,4500) <non-ESP Marker> HDR, SK
        {IDi, [CERT+], [CERTREQ+], [IDr], AUTH, N(USE_TRANSPORT_MODE),
         SAr2, TSi, TSr}

Christian
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OK I am fine with all of that. Hesham can incorporate all this in the draft.

Thanks
George

On Mon, Apr 21, 2008 at 2:24 PM,
<Christian.Kaas-Petersen@tietoenator.com> wrote:
> Thanks.  I have clarified my statements inline.
>
> Christian
>
>  > -----Original Message-----
>  > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On
>  > Behalf Of George Tsirtsis
>
>
> > Sent: 21. april 2008 15:05
>  > To: Kaas-Petersen Christian
>  > Cc: mext@ietf.org
>  > Subject: Re: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
>  >
>  > Hi Christian,
>  >
>  > Thanks for your comments, see inline...
>  >
>  > On Mon, Apr 21, 2008 at 1:50 PM,
>  > <Christian.Kaas-Petersen@tietoenator.com> wrote:
>  > > A few comments.
>  > >
>  > >  As a result of section 1's IKE exchanges, the NAT box has the
>  > > mappings
>  > >
>  > >                                        new   new
>  > >           src   dst                    src   dst
>  > >          ----  ----                   ----  ----
>  > >     UDP   500   500    maps to    UDP    X   500
>  > >     UDP  4500  4500    maps to    UDP    Y  4500
>  > >
>  > >  The following BU and BA packets will then create the mapping
>  > >
>  > >     UDP DSMIP DSMIP    maps to    UDP    Z  DSMIP
>  > >
>  > >  calling for a change in the UDP headers of the BU and BA packets.
>  > >
>  >
>  > GT> It is not clear to me if the above is an observation or whether
>  > you are suggesting something specific. I think the text
>  > already shows all this and the fact that the UDP header
>  > changes (if NAT exists) does not affect the IKEv2 SA for the BU/BA.
>  >
>
>  In "1. IKEv2 operation for ..." I read the lines
>
>   (a)   UDP(500,X) HDR, SAr1, KEr, Nr, ...
>   (b)   UDP(4500,Y) <non-ESP Marker> HDR*#, SK...
>   (c)   UDP header (sport=X, dport=DSMIPv6) ...
>   (d)   UDP Header (sport=DSMIPv6, dport=Y)
>
>  and I asked myself, is the X in (a) the same X as in (c), and is
>  the Y in (b) the same as the Y in (d), and I believe
>  the answer is no (which I tried illustrate in the NAT table),
>  so I suggest X in (c) replaced by Z and the Y in (d) replaced by Z.
>
>
>
>  >
>  > >  For section 1's IKE exchanges, the following details might be
>  > > considered
>  > >
>  > >   * Use N(USE_TRANSPORT_MODE)
>  >
>  > GT> Use that where? the packet formats already indicate ESP
>  > Transport mode.
>
>  Insert, such that
>
>
>     IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>     UDP (4500,4500) <non-ESP Marker> HDR, SK
>         {IDi, [CERT+], [CERTREQ+], [IDr], AUTH, N(USE_TRANSPORT_MODE),
>          SAr2, TSi, TSr}
>
>  Christian
>
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From: Heejin Jang <heejin.jang@samsung.com>
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Hi, Alexandru.
Thanks for your concerns.

Kindly see the below. 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Alexandru Petrescu
> Sent: Monday, April 21, 2008 6:34 PM
> To: Jari Arkko
> Cc: mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> Jari Arkko wrote:
> > The last edits are in -15 now. Any additional people who want to 
> > comment on this before its approved?
> 
> Hi Jari,
> 
> I am not familiar with the advancement of this document and the recent
> discussion.
> 
> I have just quickly skimmed through it.
> 
> I am surprised by the intention to pursue the document and get it
> approved.  Because I find a few incoherencies.  It may be I'm
> not enough familiar with the document, if so my message can 
> be discarded.
> 
> For example:
> > 3.  DHCP options for HA Dynamic Discovery
> > 
> > This section introduces new DHCP options and their 
> sub-options which 
> > are used for dynamic discovery of the home agent's IPv6 
> address, IPv6
> >  home network prefix,
> 
> So the home network prefix is discovered, presumably by MN.
> 
> > 3.1.  Home Network Information Option
> > 
> > This option is proposed to allow the exchange of home network 
> > information between the mobile node (DHCP client) and the DHCP 
> > server.  It is used to indicate the target home network 
> requested by the mobile node to the DHCP server in the Information-request 
> > message.  In the Reply message, it conveys the home network 
> > information assigned by the DHCP server to the mobile node.
> 
> The MN indicates the home network information to DHCP Server, and then
> the DHCP Server indicates back to MN the home network information.  Is
> this information the same?  Can it change?

It can change. As described 4.3, the server provides the home network
information according the id-type in the request. For e.g., 
if id-type = 0 is in the request, the server returns the configured local information
irrespective of information received from NAS.
 
> If the MN knows the home network information then why does it need the
> DHCP Server to tell it back the home network information?

This is a part of integrated-bootstrapping scenario.
So, if the MN knows its home information, it does not need to send 
an Information-request at all.

> Is the home network prefix part of the home network information?

Yes. it is home network information but its use is limited only to dynamic
HA discovery. I mean, it cannot be used for address auto-configuration.
I'm not sure I understood your questino well.

> > 4.3.  DHCP Server Behavior
> > 
> > When the server receives a Relay-forward message, it may include the 
> > MIP6 Relay Agent option in case there was home information available 
> > for the mobile node at the relay.
> 
> DHCP Server includes the MIP6 Relay Agent option into what?

See to Sec 3.2. 

"The DHCP relay agent sends this option to the DHCP server in the 
Relay-forward message."

> Overall comments about some paragraphs:
> > New DHCP options are defined which allow a mobile node to request the
> >  home agent IP address, FQDN, or home network prefix and obtain it 
> > via the DHCP response.
> 
> If this is a MN, then it could be a MR, and MR may need to learn Mobile
> Network Prefixes.  Is it necessary to learn Mobile Network Prefixes as
> well?  Just a question.

As answered previously, the prefix is provided only for dynamic 
HA discovery, not for auto-configuration or MIP6 binding.
In that sense, I don't think the MNP discovery is in the scope of this document. 

> > A mobile node can indicate its home network identity when roaming to 
> > a visited network in order to obtain the MIP6 bootstrap parameters 
> > from the home network.  As an example, the visited network may 
> > determine the home network of the mobile node based on the realm 
> > portion of the NAI (Network Access Identifier) [RFC4282] used in 
> > access authentication.
> 
> This is not a good example, it is not a good idea to decide 
> the identity of a subnet based on the realm part of NAI.  There is no relationship
> about domain names and subnet addresses, and there shouldn't be any.  If
> one needs to identify a subnet then it's by its IP subnet address, not
> by its fqdn (there's no fqdn-subnet relationship).

This is not about deciding the identity of a subnet from NAI.
For e.g., if my NAI is heejin.jang@samsung.com, it can be assumed that 
my ISP is samsung. This is just one of possible scenarios.

> I haven't read further.
> 
> Alex
> 
> 
> ______________________________________________________________________
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Hi George and all,

Thanks for your detail comments.
I modify the document according to your inputs.

I haven't talked to Sri yet for reusing the mobile node identifier  
option
instead of defining the new link-layer address option.

I upload the new document on the web, again.
http://www.sfc.wide.ad.jp/~ryuji/draft-ietf-monami6-multiplecoa-pre07-2.txt

The diff from the previous draft is also available at
http://www.sfc.wide.ad.jp/~ryuji/mcoadiff2.html

I hope we are ready for WGLC:-)

regards,
ryuji
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Looks quite good; couple of comments in-line:

> -----Original Message-----
> From: George Tsirtsis
> Sent: 17 April, 2008 11:22
> To: mext
> Subject: [MEXT] IKEv2/IPSEC and DSMIPv6 interactions
> 
> Hi all,
> 
> Here is the clarification text for IKEv2/IPSEC and DSMIPv6
> interactions. In particular, the text clarifies the behavior when
> the MN is connected to an IPv4 network, which RFC4877 does not
> cover.
> 
> Thanks to Pasi for his review and his help with defining the
> required SPDs; also thanks to Wassim and Hesham for their review.
> Hesham will fold the following text appropriately into the DSMIPv6
> draft following a hopefully quick review from the group.
> 
> Best Regards
> George
> P.S.: I will have intermittent connectivity Friday-Sunday.
> 
> 
> --------------------------------------------------------------
> ---------------------------------------------------------
> DSMIPv6 defines a number of possible data encapsulations depending on
> the MN's connectivity and MN's and HA's configuration. These
> encapsulations and the signaling required to establish them, are
> straight forward when the MN is connected to an IPv6 capable network.
> Some clarification is, however, needed for IKEv2/IPSEC operations when
> the MN is connected to an IPv4-only network.
> 
> 
> 1. IKEv2 operation for securing DSMIPv6 Signaling over IPv4
> 
> RFC4877 defines how IKEv2 is used for Mobile IPv6 and RFC4306
> includes information about how IKEv2 runs over IPv4/UDP for NAT
> Traversal. A DSMIPv6 MN connected to an IPv4-only network then,
> needs to follow the procedures described below.
> 
> To establish an SA for the protection of BU/BA messages, the DSMIPv6
> MN and the HA SHOULD implement the following IKEv2 compatible
> procedure:
> 
>         Mobile Node                      Home Agent
>         -----------                      ----------
>        IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>         UDP (500, 500) HDR, SAi1, KEi, Ni
>           NAT-D, NAT-D -->
>                             <--    IPv4(source_addr=HAADDR, 
>                                        dest_addr=V4ADDR)
>                                     UDP(500,X) HDR, SAr1, 
>                                          KEr, Nr, [CERTREQ]
>                                                NAT-D, NAT-D
> 
>         IPv4(source_addr=V4ADDR, dest_addr=HAADDR)
>         UDP (4500,4500) <non-ESP Marker> HDR, SK
>            {IDi, [CERT,] [CERTREQ,] [IDr,] AUTH, SAi2, TSi, TSr}
>                                 -->

As Christian already pointed out, this needs N(USE_TRANSPORT_MODE).
Also, a sentence saying that the contents of TSi/TSr are described
below (in the SPD entries) wouldn't hurt.

>                               <-- IPv4(source_addr=HAADDR, 
>                                   dest_addr=V4ADDR)
>                                    UDP (4500,Y) <non-ESP 
>                                       Marker> HDR*#, SK
>                                        {IDr, [CERT,] AUTH, 
>                                       SAr2, TSi, TSr}

N(USE_TRANSPORT_MODE) here, too (and just "HDR" instead of "HDR*#"?)

> The SPDs are as shown in RFC 4877 Section 7.2.1
> 
>        mobile node SPD-S:
>          - IF local_address = home_address_1 &
>               remote_address = home_agent_1 &
>               proto = MH & local_mh_type = BU & remote_mh_type = BAck
>            Then use SA ESP transport mode
>            Initiate using IDi = user_1 to address home_agent_1
> 
>        home agent SPD-S:
>          - IF local_address = home_agent_1 &
>               remote_address = home_address_1 &
>               proto = MH & local_mh_type = BAck & remote_mh_type = BU
>            Then use SA ESP transport mode
> 
> where home_address_1 is the MN's registered IPv6 home address and
> home_agent_1 is the IP address of the home agent
> 
> The above should result in BU/BA messages with the following 
> encapsulations:
>    Binding update received by the home agent:
>   IPv4 header (src=V4ADDR, dst=HA_V4ADDR)
>     UDP header (sport=X, dport=DSMIPv6)
>       IPv6 header (src=V6HOA, dst=HAADDR)
>         ESP Header in Transport Mode
>           Mobility header
>             BU [IPv4 HAO]
>              IPv4 CoA option
> 		   (+ other as needed)

Perhaps use sport=Z, since the port is not likely to be the same
as above?

> At the home agent, following UDP de-tunneling the Binding Update is
> delivered to the IPSEC module as shown below:
> 
>        IPv6 header (src=V6HOA, dst=HAADDR)
>          ESP Header in Transport Mode
>            Mobility header
>              BU [IPv4 HAO]
>               IPv4 CoA option
>                 (+ other as needed)

I would suggest explicitly saying that this packet comes with
additional information that is needed later to process the BU
correctly. E.g.
      
         + additional information: V4ADDR, Z
  
> The Binding Update following IPSEC processing is delivered to the
> DSMIPv6 home agent module as follows:
> 
>        IPv6 header (src=V6HOA, dst=HAADDR)
>          Mobility header
>            BU [IPv4 HAO]
>             IPv4 CoA option
>               (+ other as needed)

         + additional information: V4ADDR, Z

> The Binding Acknowledgement sent by the home agent module to the IPSEC
> module is as follows:
> 
>         IPv6 header (src=HAADDR, dst=V6HOA)
>             Mobility Header
>               BA ([IPv4 ACK], NAT DET)
>                (+ other as needed)

         + additional information: V4ADDR, Z, force vanilla UDP encaps

> The Binding Acknowledgement send by the HA to the MN is as follows:
> 
>   IPv4 header (src= HA_V4ADDR, dst=V4ADDR)
>     UDP Header (sport=DSMIPv6, dport=Y)
>        IPv6 header (src=HAADDR, dst=V6HOA)
>          ESP Header in Transport Mode
>            Mobility Header
>              BA ([IPv4 ACK], NAT DET)

dport=Z

> 2. IKEv2 operation for securing DSMIPv6 Data over IPv4
> 
> To secure data traffic when the MN is located on an IPv4 only network,
> the MN MUST establish a child_SA for that purpose. The procedure is as
> follows:
> 
>         Mobile Node                      Home Agent
>         -----------                      ----------
> UDP (4500,4500) <non-ESP Marker> HDR, SK
>    {[N], SA, Ni, [KEi],[TSi, TSr]}    -->
> 
>                                 <-- UDP (4500,Y) <non-ESP 
>                                         Marker> HDR, SK
>                                       {SA, Nr, [KEr], [TSi, TSr]}

IP header should be shown here, too. TSi/TSr are not optional when 
creating  an ESP child SA, so remove the brackets [].

> If no NAT is detected, the encapsulation used will be:
>    IPv4 (source_addr=v4CoA, dest_addr=HAAddr)
>      ESP
>       IP (source_addr=HoA, set_addr=CNAddr)
>         Upper_layer_HDR
> where IP=IPv4 or IPv6 and HoA=v4HoA or v6HoA
> 
> If NAT is detected, the encapsulation used will be
>    IPv4 (source_addr=v4Addr, dest_addr=HAAddr)
>       UDP (sport=X, dport=4500)
>        ESP
>          IP (source_addr=HoA, set_addr=CNAddr)
>            Upper_layer_HDR
> where v4CoA may be the external IPv4 address of the NAT, IP is either
> IPv4 or IPv6 header and HoA is either the IPv4 or the IPv6 HoA

sport=Y. Should also mention that this shows the packet as
seen by HA (not as sent by the MN).

> The SPD for data decryption whether NAT is detected or not is set as
> follows. Note that this rule is designed to match all data from the MN
> to nodes other than the HA. This is done so that this rule does not
> overlap with the earlier rule securing BU/BA signaling between the MN
> and the HA.
> 
>       Mobile Node SPD-S:
> 	- IF local_address = home_address &
> 	     remote_address != home_agent &
>            proto=any
> 	  Then use SA ESP tunnel mode
>    	Initiate using IDi = user_1 to address home_agent_1
> 
>        home agent SPD-S:
>       - IF local_address != home_agent &
>               remote_address = home_address &
>               proto = any
>         Then use SA ESP tunnel mode
> 
> where home_address is the MN's registered IPv6 or IPv4 home address
> and home_agent is the IPv6 or the IPv4 address of the home agent.

Best regards,
Pasi
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Date: Tue, 22 Apr 2008 12:43:59 +0200
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Hi Heejin, thanks for the reply,
[...]
>>> 3.1.  Home Network Information Option
>>> 
>>> This option is proposed to allow the exchange of home network 
>>> information between the mobile node (DHCP client) and the DHCP 
>>> server.  It is used to indicate the target home network
>> requested by the mobile node to the DHCP server in the 
>> Information-request
>>> message.  In the Reply message, it conveys the home network 
>>> information assigned by the DHCP server to the mobile node.
>> The MN indicates the home network information to DHCP Server, and 
>> then the DHCP Server indicates back to MN the home network 
>> information.  Is this information the same?  Can it change?
> 
> It can change. As described 4.3, the server provides the home network
>  information according the id-type in the request. For e.g., if 
> id-type = 0 is in the request, the server returns the configured 
> local information irrespective of information received from NAS.

I'm not sure current semantics of DHCP exchanges between Client and
Server allow the Client to send information to Server and Server to send
it back Information that changed.  Isn't the proposal a departure
from the DHCP semantics?

>> If the MN knows the home network information then why does it need 
>> the DHCP Server to tell it back the home network information?
> 
> This is a part of integrated-bootstrapping scenario. So, if the MN 
> knows its home information, it does not need to send an 
> Information-request at all.

So why does the draft say that the "[Home Network Information Option] is
used to indicate the target home network requested by the mobile node to
the DHCP server in the Information-request message."

>> Is the home network prefix part of the home network information?
> 
> Yes. it is home network information but its use is limited only to 
> dynamic HA discovery. I mean, it cannot be used for address 
> auto-configuration. I'm not sure I understood your questino well.

I don't understand what is the available information at MN prior to
doing DHCP.

>>> 4.3.  DHCP Server Behavior
>>> 
>>> When the server receives a Relay-forward message, it may include 
>>> the MIP6 Relay Agent option in case there was home information 
>>> available for the mobile node at the relay.
>> DHCP Server includes the MIP6 Relay Agent option into what?
> 
> See to Sec 3.2.
> 
> "The DHCP relay agent sends this option to the DHCP server in the 
> Relay-forward message."

Ok that, but I wondered where does the DHCP Server put its MIP6 Relay
Agent option in?  In what message?  Relay puts it in Relay-Forward
message, but the Server puts it in what?

>>> New DHCP options are defined which allow a mobile node to request
>>>  the home agent IP address, FQDN, or home network prefix and 
>>> obtain it via the DHCP response.
>> If this is a MN, then it could be a MR, and MR may need to learn 
>> Mobile Network Prefixes.  Is it necessary to learn Mobile Network 
>> Prefixes as well?  Just a question.
> 
> As answered previously, the prefix is provided only for dynamic HA 
> discovery, not for auto-configuration or MIP6 binding. In that sense,
>  I don't think the MNP discovery is in the scope of this document.

Ok.

>>> A mobile node can indicate its home network identity when roaming
>>>  to a visited network in order to obtain the MIP6 bootstrap 
>>> parameters from the home network.  As an example, the visited 
>>> network may determine the home network of the mobile node based 
>>> on the realm portion of the NAI (Network Access Identifier) 
>>> [RFC4282] used in access authentication.
>> This is not a good example, it is not a good idea to decide the 
>> identity of a subnet based on the realm part of NAI.  There is no 
>> relationship about domain names and subnet addresses, and there 
>> shouldn't be any.  If one needs to identify a subnet then it's by 
>> its IP subnet address, not by its fqdn (there's no fqdn-subnet 
>> relationship).
> 
> This is not about deciding the identity of a subnet from NAI. For 
> e.g., if my NAI is heejin.jang@samsung.com, it can be assumed that my
>  ISP is samsung. This is just one of possible scenarios.

I'm sure this is impossible.  samsung has many subnets.  It's impossible
to identify all samsung's subnets only by one realm samsung.com.

HA acts on a subnet (HA and subnet are tightly related by HA doing proxy
ND) not across an entire domain.  Most often a domain is made of several
subnets.

That's why I thought it's not a good example.

Alex

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From mext-bounces@ietf.org  Tue Apr 22 06:06:18 2008
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Subject: [MEXT] New items in MEXT charter
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Hi,

These are the modifications that we are planning to include in the MEXT 
chrter.

They are the items that have been accepted by the WG and we have 
proposed some rogh dates for each of those.

Please let us know if you have a problem with the dates.

We are planning to submit this next week (deadline for comments 28 april)

Regards, Julien and marcelo

Binding Revocation for IP Mobility:

 Define a binding revocation mechanism for Mobile IPv6 and its
 extensions.  This mechanism can be used by any entity involved in the
 base Mobile IPv6 protocol or one of its extensions to request its
 corresponding entity to terminate either one, multiple or all binding
 cache entries.

 Generic Notification Message for Mobile IPv6

 A proposal for defining generic notification framework that can be
 used by the mobility entities for sending and receiving asynchronous
 notification messages was proposed and the same was adopted by the
 WG.

 Virtual Home Link configuration for Mobile IPv6

 A proposal has been made on Mobile IPv6 home link configuration on
 virtual links. The proposal does not describe any new protocol, but
 provides the operational and configuration details and additionally
 provides implementation guidance for achieving this
 configuration.Extend DSMIPv6 Home Network Support

 Extend DSMIPv6 Home Network Support

 DSMIPv6 assumes the home network to be dual stack providing
 simultaneous IPv6 and IPv4 network access. It is proposed to extend
 DSMIPv6 to support home networks which provides IPv4, or IPv6
 respectively, direct network access only, but where virtual IPv6 home
 network connectivity, or virtual IPv4 home network connectivity
 respectively, may be obtained by tunneling to the HA. The latter
 shall be obtained by DSMIPv6 operation using the v4HoA address as
 Care-of-address for the v6HoA address, and vice versa, the v6HoA
 address as care-of-address for the v4HoA address.


 July 08 - Submit 00 draft on Binding Revocation

 Oct 08 - Submit 00 draft on Generic Notification

 Oct 08 - Submit 00 draft on Virtual Home link configuration

 Oct 08 - Submit 00 draft on Extended DSMIPv6 Home Network support


 Dec 08 - Submit draft on Binding Revocation to IESG

 Jan 09 - Submit draft on Generic Notification to IESG

 Jan 09 - Submit draft on Virtual Home link configuration to IESG

Jan 09 - Submit draft on Extended DSMIPv6 Home Network support to IESG

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From: "Giaretta, Gerardo" <gerardog@qualcomm.com>
To: "marcelo bagnulo" <marcelo@it.uc3m.es>, "mext" <mext@ietf.org>
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Subject: Re: [MEXT] New items in MEXT charter
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Hi Julien and Marcelo,

Thanks for providing the list of new items. Please see one question
below

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf
Of
> marcelo bagnulo
> Sent: Tuesday, April 22, 2008 6:06 AM
> To: mext
> Cc: Julien Laganier
> Subject: [MEXT] New items in MEXT charter
> 
> Hi,
> 
> These are the modifications that we are planning to include in the
MEXT
> chrter.
> 
> They are the items that have been accepted by the WG and we have
> proposed some rogh dates for each of those.
> 
> Please let us know if you have a problem with the dates.
> 
> We are planning to submit this next week (deadline for comments 28
april)
> 
> Regards, Julien and marcelo
> 
> Binding Revocation for IP Mobility:
> 
>  Define a binding revocation mechanism for Mobile IPv6 and its
>  extensions.  This mechanism can be used by any entity involved in the
>  base Mobile IPv6 protocol or one of its extensions to request its
>  corresponding entity to terminate either one, multiple or all binding
>  cache entries.
> 
>  Generic Notification Message for Mobile IPv6
> 
>  A proposal for defining generic notification framework that can be
>  used by the mobility entities for sending and receiving asynchronous
>  notification messages was proposed and the same was adopted by the
>  WG.
> 
>  Virtual Home Link configuration for Mobile IPv6
> 
>  A proposal has been made on Mobile IPv6 home link configuration on
>  virtual links. The proposal does not describe any new protocol, but
>  provides the operational and configuration details and additionally
>  provides implementation guidance for achieving this
>  configuration.Extend DSMIPv6 Home Network Support
> 
>  Extend DSMIPv6 Home Network Support
> 
>  DSMIPv6 assumes the home network to be dual stack providing
>  simultaneous IPv6 and IPv4 network access. It is proposed to extend
>  DSMIPv6 to support home networks which provides IPv4, or IPv6
>  respectively, direct network access only, but where virtual IPv6 home
>  network connectivity, or virtual IPv4 home network connectivity
>  respectively, may be obtained by tunneling to the HA. The latter
>  shall be obtained by DSMIPv6 operation using the v4HoA address as
>  Care-of-address for the v6HoA address, and vice versa, the v6HoA
>  address as care-of-address for the v4HoA address.
> 
> 
>  July 08 - Submit 00 draft on Binding Revocation
> 
>  Oct 08 - Submit 00 draft on Generic Notification
> 
>  Oct 08 - Submit 00 draft on Virtual Home link configuration
> 
>  Oct 08 - Submit 00 draft on Extended DSMIPv6 Home Network support
> 
> 
>  Dec 08 - Submit draft on Binding Revocation to IESG
>

There is a 3GPP dependency on this item (based on TS 24.303) and it
would be good to have it published before the end of 08. The draft has
been around for a while and has already received some good reviews. Do
you think it is feasible to submit the draft to IESG by
September/October?

I also think having 00 version in July is way too late. Isn't just the
draft ready for a 00 WG item version?

Thanks
Gerardo
 
>  Jan 09 - Submit draft on Generic Notification to IESG
> 
>  Jan 09 - Submit draft on Virtual Home link configuration to IESG
> 
> Jan 09 - Submit draft on Extended DSMIPv6 Home Network support to IESG
> 
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
_______________________________________________
MEXT mailing list
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From mext-bounces@ietf.org  Tue Apr 22 12:28:45 2008
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Thread-Topic: [MEXT] New items in MEXT charter
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References: <480DE2C1.1020502@it.uc3m.es>
	<CBDFC23ECA34FA4CBC21675A25C28D61017FFDA7@NAEX12.na.qualcomm.com>
From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Giaretta, Gerardo" <gerardog@qualcomm.com>,
	"marcelo bagnulo" <marcelo@it.uc3m.es>, "mext" <mext@ietf.org>
Cc: Julien Laganier <julien.IETF@laposte.net>
Subject: Re: [MEXT] New items in MEXT charter
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Hi Gerardo,
Just as an FYI, The authors of the binding revocation draft will publish
the 00 MEXT personal draft next week to address the latest comments we
have received. 

Regards,
Ahmad
 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Giaretta, Gerardo
> Sent: Tuesday, April 22, 2008 11:59 AM
> To: marcelo bagnulo; mext
> Cc: Julien Laganier
> Subject: Re: [MEXT] New items in MEXT charter
> 
> Hi Julien and Marcelo,
> 
> Thanks for providing the list of new items. Please see one 
> question below
> 
> > -----Original Message-----
> > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf
> Of
> > marcelo bagnulo
> > Sent: Tuesday, April 22, 2008 6:06 AM
> > To: mext
> > Cc: Julien Laganier
> > Subject: [MEXT] New items in MEXT charter
> > 
> > Hi,
> > 
> > These are the modifications that we are planning to include in the
> MEXT
> > chrter.
> > 
> > They are the items that have been accepted by the WG and we have 
> > proposed some rogh dates for each of those.
> > 
> > Please let us know if you have a problem with the dates.
> > 
> > We are planning to submit this next week (deadline for comments 28
> april)
> > 
> > Regards, Julien and marcelo
> > 
> > Binding Revocation for IP Mobility:
> > 
> >  Define a binding revocation mechanism for Mobile IPv6 and its  
> > extensions.  This mechanism can be used by any entity 
> involved in the  
> > base Mobile IPv6 protocol or one of its extensions to request its  
> > corresponding entity to terminate either one, multiple or 
> all binding  
> > cache entries.
> > 
> >  Generic Notification Message for Mobile IPv6
> > 
> >  A proposal for defining generic notification framework 
> that can be  
> > used by the mobility entities for sending and receiving 
> asynchronous  
> > notification messages was proposed and the same was adopted by the  
> > WG.
> > 
> >  Virtual Home Link configuration for Mobile IPv6
> > 
> >  A proposal has been made on Mobile IPv6 home link 
> configuration on  
> > virtual links. The proposal does not describe any new 
> protocol, but  
> > provides the operational and configuration details and 
> additionally  
> > provides implementation guidance for achieving this  
> > configuration.Extend DSMIPv6 Home Network Support
> > 
> >  Extend DSMIPv6 Home Network Support
> > 
> >  DSMIPv6 assumes the home network to be dual stack providing  
> > simultaneous IPv6 and IPv4 network access. It is proposed to extend
> >  DSMIPv6 to support home networks which provides IPv4, or IPv6  
> > respectively, direct network access only, but where virtual 
> IPv6 home  
> > network connectivity, or virtual IPv4 home network connectivity  
> > respectively, may be obtained by tunneling to the HA. The latter  
> > shall be obtained by DSMIPv6 operation using the v4HoA address as  
> > Care-of-address for the v6HoA address, and vice versa, the v6HoA  
> > address as care-of-address for the v4HoA address.
> > 
> > 
> >  July 08 - Submit 00 draft on Binding Revocation
> > 
> >  Oct 08 - Submit 00 draft on Generic Notification
> > 
> >  Oct 08 - Submit 00 draft on Virtual Home link configuration
> > 
> >  Oct 08 - Submit 00 draft on Extended DSMIPv6 Home Network support
> > 
> > 
> >  Dec 08 - Submit draft on Binding Revocation to IESG
> >
> 
> There is a 3GPP dependency on this item (based on TS 24.303) 
> and it would be good to have it published before the end of 
> 08. The draft has been around for a while and has already 
> received some good reviews. Do you think it is feasible to 
> submit the draft to IESG by September/October?
> 
> I also think having 00 version in July is way too late. Isn't 
> just the draft ready for a 00 WG item version?
> 
> Thanks
> Gerardo
>  
> >  Jan 09 - Submit draft on Generic Notification to IESG
> > 
> >  Jan 09 - Submit draft on Virtual Home link configuration to IESG
> > 
> > Jan 09 - Submit draft on Extended DSMIPv6 Home Network 
> support to IESG
> > 
> > _______________________________________________
> > MEXT mailing list
> > MEXT@ietf.org
> > https://www.ietf.org/mailman/listinfo/mext
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
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From mext-bounces@ietf.org  Tue Apr 22 18:13:37 2008
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From: Heejin Jang <heejin.jang@samsung.com>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Hi, Alexandru.

Please read the document carefully.
I think that answers to some of your questions can be found in the draft already.

> -----Original Message-----
> From: Alexandru Petrescu [mailto:alexandru.petrescu@gmail.com] 
> Sent: Tuesday, April 22, 2008 7:44 PM
> To: heejin.jang@samsung.com
> Cc: Jari Arkko; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> Hi Heejin, thanks for the reply,
> [...]
> >>> 3.1.  Home Network Information Option
> >>> 
> >>> This option is proposed to allow the exchange of home network 
> >>> information between the mobile node (DHCP client) and the DHCP 
> >>> server.  It is used to indicate the target home network
> >> requested by the mobile node to the DHCP server in the 
> >> Information-request
> >>> message.  In the Reply message, it conveys the home network 
> >>> information assigned by the DHCP server to the mobile node.
> >> The MN indicates the home network information to DHCP Server, and 
> >> then the DHCP Server indicates back to MN the home network 
> >> information.  Is this information the same?  Can it change?
> > 
> > It can change. As described 4.3, the server provides the 
> home network
> >  information according the id-type in the request. For e.g., if 
> > id-type = 0 is in the request, the server returns the configured 
> > local information irrespective of information received from NAS.
> 
> I'm not sure current semantics of DHCP exchanges between Client and
> Server allow the Client to send information to Server and Server to send
> it back Information that changed.  Isn't the proposal a departure
> from the DHCP semantics?

HN info option is used differently in the request & reply, respectively.
In the request, it specifies its preference where the home information is assigned.
while, in the request, it carries the information provided by the server.

> 
> >> If the MN knows the home network information then why does it need 
> >> the DHCP Server to tell it back the home network information?
> > 
> > This is a part of integrated-bootstrapping scenario. So, if the MN 
> > knows its home information, it does not need to send an 
> > Information-request at all.
> 
> So why does the draft say that the "[Home Network Information Option] is 
> used to indicate the target home network requested by the mobile node to
> the DHCP server in the Information-request message."

As document saids, the procedures follow the stateless DHCPv6.
So, only when the MN wants to retrieve the required information, it
intiates the stateless DHCPv6.

> >> Is the home network prefix part of the home network information?
> > 
> > Yes. it is home network information but its use is limited only to 
> > dynamic HA discovery. I mean, it cannot be used for address 
> > auto-configuration. I'm not sure I understood your questino well.
> 
> I don't understand what is the available information at MN prior to
> doing DHCP.
> 
> >>> 4.3.  DHCP Server Behavior
> >>> 
> >>> When the server receives a Relay-forward message, it may include 
> >>> the MIP6 Relay Agent option in case there was home information 
> >>> available for the mobile node at the relay.
> >> DHCP Server includes the MIP6 Relay Agent option into what?
> > 
> > See to Sec 3.2.
> > 
> > "The DHCP relay agent sends this option to the DHCP server in the 
> > Relay-forward message."
> 
> Ok that, but I wondered where does the DHCP Server put its MIP6 Relay
> Agent option in?  In what message?  Relay puts it in Relay-Forward
> message, but the Server puts it in what?

Server puts the HN information option in the Reply, not MIP6 Relay option.
Sever replies with the HN information option according to the HN info option 
in the request, based on the collected information which may have been delivered 
from NAS with MIP6 relay option or pre-configured by admin.

This is described in the 1st paragraph of Sec 4.3.

> >>> New DHCP options are defined which allow a mobile node to request
> >>>  the home agent IP address, FQDN, or home network prefix and 
> >>> obtain it via the DHCP response.
> >> If this is a MN, then it could be a MR, and MR may need to learn 
> >> Mobile Network Prefixes.  Is it necessary to learn Mobile Network 
> >> Prefixes as well?  Just a question.
> > 
> > As answered previously, the prefix is provided only for dynamic HA 
> > discovery, not for auto-configuration or MIP6 binding. In 
> that sense,
> >  I don't think the MNP discovery is in the scope of this document.
> 
> Ok.
> 
> >>> A mobile node can indicate its home network identity when roaming
> >>>  to a visited network in order to obtain the MIP6 bootstrap 
> >>> parameters from the home network.  As an example, the visited 
> >>> network may determine the home network of the mobile node based 
> >>> on the realm portion of the NAI (Network Access Identifier) 
> >>> [RFC4282] used in access authentication.
> >> This is not a good example, it is not a good idea to decide the 
> >> identity of a subnet based on the realm part of NAI.  There is no 
> >> relationship about domain names and subnet addresses, and there 
> >> shouldn't be any.  If one needs to identify a subnet then it's by 
> >> its IP subnet address, not by its fqdn (there's no fqdn-subnet 
> >> relationship).
> > 
> > This is not about deciding the identity of a subnet from NAI. For 
> > e.g., if my NAI is heejin.jang@samsung.com, it can be 
> assumed that my ISP is samsung. This is just one of possible scenarios.
> 
> I'm sure this is impossible.  samsung has many subnets.  It's impossible
> to identify all samsung's subnets only by one realm samsung.com.
> 
> HA acts on a subnet (HA and subnet are tightly related by HA doing proxy
> ND) not across an entire domain.  Most often a domain is made of several
> subnets.
> 
> That's why I thought it's not a good example.

There can be many deployment ways to enable the scenario.
For e.g., 

1) the server simply returns the HN prefix. 
Then the MN perform dynamic HN discovery according to rfc3775.

2) the NAS is configured a proper HA info. 
For example, AAA server may deliver to NAS the nearest HA info 
considering each NAS's location such as "ha_philly.samsung.com" in Philly. 

2) suppose the server replied with the FQDN ("ha.samsung.com").
But it does not necessarily mean phisycally a single HA instance all the time. 
The fqdn may be shared among multiple HAs and dns server may return the different
IP based on a source IP of the DNS request or simply as a round-robin. 

There can be multiple ways to implement this.
however, how to do depends on deployment policy, and not in the scope 
of the hiopt document. 


> Alex
> 
> ______________________________________________________________________
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Date: Wed, 23 Apr 2008 12:21:22 +0200
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Heejin Jang wrote:
> 
> Hi, Alexandru.
> 
> Please read the document carefully. I think that answers to some of
> your questions can be found in the draft already.

Hi Heejin, please take my remarks as speaking from my own experience of
using DHCP.  I don't have a vast DHCP experience and you may be right at
some points.  I just find that some logic is a bit flawed.

>> -----Original Message----- From: Alexandru Petrescu
>> [mailto:alexandru.petrescu@gmail.com] Sent: Tuesday, April 22, 2008
>> 7:44 PM To: heejin.jang@samsung.com Cc: Jari Arkko; mext@ietf.org 
>> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
>> 
>> Hi Heejin, thanks for the reply, [...]
>>>>> 3.1.  Home Network Information Option
>>>>> 
>>>>> This option is proposed to allow the exchange of home network
>>>>>  information between the mobile node (DHCP client) and the
>>>>> DHCP server.  It is used to indicate the target home network
>>>> requested by the mobile node to the DHCP server in the 
>>>> Information-request
>>>>> message.  In the Reply message, it conveys the home network 
>>>>> information assigned by the DHCP server to the mobile node.
>>>> The MN indicates the home network information to DHCP Server,
>>>> and then the DHCP Server indicates back to MN the home network
>>>>  information.  Is this information the same?  Can it change?
>>> It can change. As described 4.3, the server provides the
>> home network
>>> information according the id-type in the request. For e.g., if 
>>> id-type = 0 is in the request, the server returns the configured
>>>  local information irrespective of information received from NAS.
>>> 
>> I'm not sure current semantics of DHCP exchanges between Client and
>>  Server allow the Client to send information to Server and Server
>> to send it back Information that changed.  Isn't the proposal a
>> departure from the DHCP semantics?
> 
> HN info option is used differently in the request & reply,
> respectively. In the request, it specifies its preference where the
> home information is assigned. while, in the request, it carries the
> information provided by the server.

Ok.  Is there another example of non-mip6 information exchanged with
DHCP that follows this kind of logic?

For example, is there an existing DHCPv6 possibility for Client to
suggest e.g. Printer-Address to Server and Server reply back to Client
another Printer-Address?  Or some other information: DNS Server
suggested by Client and suggested back differently by Server, or similar
example.

>>>> If the MN knows the home network information then why does it
>>>> need the DHCP Server to tell it back the home network
>>>> information?
>>> This is a part of integrated-bootstrapping scenario. So, if the
>>> MN knows its home information, it does not need to send an 
>>> Information-request at all.
>> So why does the draft say that the "[Home Network Information
>> Option] is used to indicate the target home network requested by
>> the mobile node to the DHCP server in the Information-request
>> message."
> 
> As document saids, the procedures follow the stateless DHCPv6. So,
> only when the MN wants to retrieve the required information, it 
> intiates the stateless DHCPv6.

I'm not sure I understand you.  First, do you mean the "Stateless
DHCPv6" described in RFC3736?

I think that RFC doesn't suggest the Client to put data in a request and
the Server to suggest back a different data.  Or, apparently, a hiopt-13
Client puts  IPv6 home network prefix in a Request, with sub-opt-code
equal 2, Relay forwards it to Server, and Server puts another IPv6 home
network prefix in a Reply, apparently.  Is this the intended hiop-13
behaviour?

Is this behaviour in this sense completely different than the typical
DHCPv6 operation?

>>>> Is the home network prefix part of the home network
>>>> information?
>>> Yes. it is home network information but its use is limited only
>>> to dynamic HA discovery. I mean, it cannot be used for address 
>>> auto-configuration. I'm not sure I understood your questino well.
>>> 
>> I don't understand what is the available information at MN prior to
>>  doing DHCP.
>> 
>>>>> 4.3.  DHCP Server Behavior
>>>>> 
>>>>> When the server receives a Relay-forward message, it may
>>>>> include the MIP6 Relay Agent option in case there was home
>>>>> information available for the mobile node at the relay.
>>>> DHCP Server includes the MIP6 Relay Agent option into what?
>>> See to Sec 3.2.
>>> 
>>> "The DHCP relay agent sends this option to the DHCP server in the
>>>  Relay-forward message."
>> Ok that, but I wondered where does the DHCP Server put its MIP6
>> Relay Agent option in?  In what message?  Relay puts it in
>> Relay-Forward message, but the Server puts it in what?
> 
> Server puts the HN information option in the Reply, not MIP6 Relay
> option.

In the Relay-Reply or in the Reply?  I think the document should be
clear about this.

I would go as far as to suggest two new subsections (1) that describes
simply and clearly the overall hiopt message exchanges and (2) list a
concentrate of what are the modifications to DHCPv6 RFC3315 that this
document suggests.  A subsection picturing the topology involved 
wouldn't hurt either.

> Sever replies with the HN information option according to the HN info
> option in the request, based on the collected information which may
> have been delivered from NAS with MIP6 relay option or pre-configured
> by admin.

I don't understand how the Reply is based on the collected information.
  To understand that, the hiopt-13 draft suggests reading
mip6-integrated, mip6-bootstrapping-integrated-dhc and mip6-radius drafts.

Could hiopt-13 document be made standalone, so I could understand it
without reading other documents?

> This is described in the 1st paragraph of Sec 4.3.

Ok.  It should say Relay-Reply sometimes, not only Reply.

>>>>> New DHCP options are defined which allow a mobile node to
>>>>> request the home agent IP address, FQDN, or home network
>>>>> prefix and obtain it via the DHCP response.
>>>> If this is a MN, then it could be a MR, and MR may need to
>>>> learn Mobile Network Prefixes.  Is it necessary to learn Mobile
>>>> Network Prefixes as well?  Just a question.
>>> As answered previously, the prefix is provided only for dynamic
>>> HA discovery, not for auto-configuration or MIP6 binding. In
>> that sense,
>>> I don't think the MNP discovery is in the scope of this document.
>>> 
>> Ok.
>> 
>>>>> A mobile node can indicate its home network identity when
>>>>> roaming to a visited network in order to obtain the MIP6
>>>>> bootstrap parameters from the home network.  As an example,
>>>>> the visited network may determine the home network of the
>>>>> mobile node based on the realm portion of the NAI (Network
>>>>> Access Identifier) [RFC4282] used in access authentication.
>>>> This is not a good example, it is not a good idea to decide the
>>>>  identity of a subnet based on the realm part of NAI.  There is
>>>> no relationship about domain names and subnet addresses, and
>>>> there shouldn't be any.  If one needs to identify a subnet then
>>>> it's by its IP subnet address, not by its fqdn (there's no
>>>> fqdn-subnet relationship).
>>> This is not about deciding the identity of a subnet from NAI. For
>>>  e.g., if my NAI is heejin.jang@samsung.com, it can be
>> assumed that my ISP is samsung. This is just one of possible
>> scenarios.
>> 
>> I'm sure this is impossible.  samsung has many subnets.  It's
>> impossible to identify all samsung's subnets only by one realm
>> samsung.com.
>> 
>> HA acts on a subnet (HA and subnet are tightly related by HA doing
>> proxy ND) not across an entire domain.  Most often a domain is made
>> of several subnets.
>> 
>> That's why I thought it's not a good example.
> 
> There can be many deployment ways to enable the scenario. For e.g.,
> 
> 1) the server simply returns the HN prefix. Then the MN perform
> dynamic HN discovery according to rfc3775.

Ok, but the NAI identification of a subnet is still a wrong example, right?

> 2) the NAS is configured a proper HA info. For example, AAA server
> may deliver to NAS the nearest HA info considering each NAS's
> location such as "ha_philly.samsung.com" in Philly.

And thus DHCP is not involved, right?

> 2) suppose the server replied with the FQDN ("ha.samsung.com").
> 
> But it does not necessarily mean phisycally a single HA instance all
> the time. The fqdn may be shared among multiple HAs and dns server
> may return the different IP based on a source IP of the DNS request
> or simply as a round-robin.

This is typically what happens with VPN servers, not Home Agents.  It is
very rare if at all feasible to use a Home Agent as a VPN Server.

The goals of a HA (mainly support continuous sessions and permanent
publicly reachable HoA) are completely different than the goals of a VPN
Server (mainly offering secure access to private non-reachable network).
  These goals are completely different.

It is wrong to give an example of HA when you actually mean VPN.  Please
use VPN in the above description.

> There can be multiple ways to implement this. however, how to do
> depends on deployment policy, and not in the scope of the hiopt
> document.

Please don't redirect me to policy.

Thanks,

Alex


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Dear Tony,

Having read through your proposal, I have some remarks.

1. "No Authentication SA"
You propose to provide a kind of "null AUTH" inside the IKE_AUTH message so=
 that authentication of the Mobile Node can be omitted. However, to at leas=
t provide assurance that the HoA is valid, you suggest running the initial =
IKE exchanges with the HoA as source address and therefore over the Home Ag=
ent and switch to the CoA later on, based on MOBIKE.

In this case, the latency is not better than that in MIPv6 RR, that you say=
 is not efficient: 2 RTTs for the IKE exchange over the HoA, one for updati=
ng the SA address with MOBIKE and an additional one for the RR procedure fo=
r validating the new CoA. This results in 4 RTTs - more than in MIPv6 with =
BU/BA exchange followed by RR and BU/BA, making it 3 RTTs.


2. "Authenticated SA"
I assume this is the first part of the mechanism the draft presents as the =
main solution, as opposed to the "Non Authenticated SA".

It is heavily worded on Mobile Hosts/Home Addresses instead of Mobile Route=
rs/Mobile Network Prefixes.
You mention setting Traffic Selectors to routes (=3Dprefix instead of a sin=
gle address?) for the Mobile Router and, later on, that NAT traversal is im=
plicitly possible. IIRC in the case of NAT traversal, the Traffic Selectors=
 can only consist of a single IP address, and not of a range.


3. "Host to Subnet Transport Mode"
This is an evolution to the "No Protection SA", based on creating a new IKE=
 Child SA alongside the existing AH/ESP options?

At this stage I started to wonder about the relationship of your proposal a=
nd MIPv6/NEMO.
If instead of using a Home Address Option/Type 2 Routing Header you introdu=
ce an arbitrary Type X and Y Routing Header and you stick to the "Authentic=
ated SA with permission to use the HoA", this is completely independent of =
MIPv6/NEMO.

In addition you assume that the Mobile Router not just performs the mobilit=
y signalling but also the end2end IPsec management.


Your key idea is to modify IKEv2 so that instead of just setting up IPSec r=
elated SAs it becomes a more generic framework, independent of MEXT that ca=
n be used for mobility purposes.
I am wondering whether these modifications on IKEv2 (that extend its purpos=
e) are within the scope of the working group?



Christian



> -----Urspr=FCngliche Nachricht-----
> Von: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] Im Auftrag von
> Tony Whyman
> Gesendet: Freitag, 4. April 2008 13:23
> An: mext@ietf.org
> Betreff: [MEXT] A Proposed Solution for Aeronautical RO
> =

> Dear all,
> =

> I have prepared a proposed IPsec based RO scheme that is intended to
> meet the requirements contained in draft-ietf-mext-aero-reqs-01. The
> paper can be downloaded from:
> =

> http://www.mccallumwhyman.com/papers/Proposal%20for%20Aeronautical%20RO.pd
> f
> =

> It's a large paper (15,000+ words) but that is because of the large
> Appendix A, which is an analysis of how the proposal meets the current
> aeronautical use cases. Appendix B also provides a compliancy check
> against draft-ietf-mext-aero-reqs-01.
> =

> The main body of the paper is likely to be of most interest to this
> group. In this, I have tried to evolve the IPsec RO approach proposed in
> draft-ietf-mip6-cn-ipsec-07 into a common framework with the
> recommendations of Eurocontrol 2006  IP Study. This study was intended
> to "assess the feasibility of using IP to support the next generation of
> collaborative ATS applications, in the 2020+ timeframe". The published
> results of that study can be downloaded from the ICAO website (URL in
> the references list of my paper).
> =

> Although the focus of the paper is on meeting the requirements for
> Aeronautical use, I do not believe that the requirements are unique to
> civil aviation. The UK Railways Safety and Standards Board (RSSB) is
> also about to publish a Guidance Note (Ref: GE/GN8579) which is intended
> to co-ordinate the use of IP Networking for mobile networking to trains.
> SATCOM, GPRS, WiFi and WiMAX networks are already being used to support
> passenger "on train" internet access and some operational use, and this
> Guidance Note is intended to co-ordinate the use of IP for operational
> comms, leading into Safety Related applications. It was the result of
> industry consultation and workshops and resulted in a very similar set
> of operational scenarios to those seen in ATC, and a similar proposal
> for IPsec based mobile communications.
> =

> My own conclusion from all this, is that there is a real need for an
> IPsec based Mobility Framework to meet the needs of Operational
> Communications in (at least) Transport Infrastructure applications.
> =

> My paper has made some specific criticisms of
> draft-ietf-mip6-cn-ipsec-07, where I do not believe it meets the needs
> of aeronautical communications. However, the underlying criticism is
> that draft-ietf-mip6-cn-ipsec-07 is relatively neutral as regards IKEv1
> and IKEv2. My view is that IKEv2 is not just a better protocol, but with
> improved Traffic Selection signalling and the MOBIKE (RFC 4555), it is
> the only flavour of IPsec IKE that should be considered for an IPsec
> based mobility framework.
> =

> Starting with the assumption that IKEv2/MOBIKE is used, I believe that
> it is possible to demonstrate a much improved strategy for IPsec based
> Route Optimisation, that starts with the use of the Home Address as the
> MN SA end-point and then moves it to the care-of address. Thus
> demonstrating both authorisation to use the Home Address and Return
> Routability to both addresses before any user data is exchanged.
> Interestingly, if user data is to be protected by ESP or AH tunnelling
> then there seems to be no need to exchange a Binding Update, as Child
> SAs with appropriate Traffic Selectors seem to be sufficient.
> =

> A further step is also possible if both MN and CN support a common PKI
> that provides both authentication and authorisation of the MN to use its
> Home Address. In this case, it appears possible for the MN to start the
> IPsec based RO procedure direct from its care-of address without there
> needing to be any Home Agent involvement. This is particularly
> interesting to aeronautical use, where communication is generally
> aircraft initiated, as it avoids both availability and regulatory issues
> with Home Agents, and fits with the recommendations of the Eurocontrol
> IP Study. Although it did not call it as such, this study essentially
> proposed an IPsec based RO scheme, which it called "tunnel movement" and
> assumed a PKI that authenticated aircraft and their use of their static
> IP Addresses.
> =

> The study limited itself to what was possible with published RFCs, and
> thus all air/ground communications had to be ESP tunnelled, due to the
> use of IKEv2/MOBIKE to manage the communications paths. Two specific
> criticisms arise from this. One is that there are many cases where an
> RFC 3775 Home Address Option/Type 2 Routing Header and Transport mode
> ESP would be more efficient than ESP tunnelling, and the other is that
> it forces all air/ground communications to be protected, even when the
> overhead of doing so is not otherwise justifiable.
> =

> In my paper, I have tried to resolve both criticisms.
> =

> I have resolved the first, by proposing a new IPsec SA mode that
> essentially combines ESP/AH transport mode with use of the RFC 3775 Home
> Address Option/Type 2 Routing Header.
> =

> I have resolved the second by proposing the notion of "No Protection"
> SAs - i.e. using the IKEv2 to negotiate IP-in-IP tunnels, or use of the
> RFC 3775 Home Address Option/Type 2 Routing Header. Although this seems
> to be counter-intuitive for the IPsec IKE to negotiate off security, the
> benefit is in having a single mechanism to manage unprotected mobile
> communications, when there is also a need for secure mobile communication=
s.
> =

> My paper also examines the case where the IKE is used to manage secure
> mobile communications but has no means of authenticating the MN to the
> CN. This appears to be interesting as part of a wider framework, but is
> not of direct interest to aeronautical communications.
> =

> I have also investigated possible implications for MN to HA
> communications, and proposed IKEv2/MOBIKE scenarios where Binding
> Updates are no longer needed here. Again, this is not of direct interest
> to aeronautical communications, but should be of wider interest.
> =

> Looking back on the paper, although I started writing assuming IPv6
> only, almost everything proposed is also relevant to IPv4. Only the use
> of the RFC 3775 Home Address Option/Type 2 Routing Header is IPv6 specifi=
c.
> =

> Using the IKE to manage mobility also seems to have some other
> interesting implications. Like it or not, NAT Gateways are well
> supported by IPsec, and a Mobile Node that uses  IKEv2/MOBIKE to manage
> both its HA binding and RO, seems to be able to move behind NAT Gateways
> and then re-emerge without any obvious problems - although this mode of
> operation is limited to ESP tunnels.
> =

> Basic NEMO operations should really be just a case of an appropriate set
> of SA Traffic Selectors for MN to SA tunnels. If a PKI exists that
> allows a CN to authenticate a Mobile Router and authorise the routes it
> offers, then the use of the IKE to manage Mobile Router Route
> Optimisation also appears to be an interesting approach. This is very
> relevant to Aeronautical use.
> =

> IKEv2/MOBIKE has limited multi-homing capability, in respect of
> supporting the use of multi-homing for increasing availability. Load
> sharing is not part of the current framework. The use of multi-homing
> for increasing availability meets a perceived aeronautical requirement
> to enable high availability of air/ground communications through agility
> in the use of alternative networks. Extension to load sharing seems to a
> suitable topic for future work, but not essential for aeronautical use.
> =

> The purpose of this paper is to develop an IPsec based RO strategy
> suitable for aeronautical use and one that is also suitable for similar
> transport infrastructure uses, but I believe the use of IPsec based
> mobility management using IKEv2 and MOBIKE should be of general interest.
> =

> Regards
> =

> Tony Whyman
> =

> =

> =

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From: Heejin Jang <heejin.jang@samsung.com>
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Hi, Alex.
Please see below.

> -----Original Message-----
> From: Alexandru Petrescu [mailto:alexandru.petrescu@gmail.com] 
> Sent: Wednesday, April 23, 2008 7:21 PM
> To: heejin.jang@samsung.com
> Cc: Jari Arkko; mext@ietf.org
> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> 
> Heejin Jang wrote:
> > 
> > Hi, Alexandru.
> > 
> > Please read the document carefully. I think that answers to some of 
> > your questions can be found in the draft already.
> 
> Hi Heejin, please take my remarks as speaking from my own 
> experience of using DHCP.  I don't have a vast DHCP 
> experience and you may be right at some points.  I just find 
> that some logic is a bit flawed.
> 
> >> -----Original Message----- From: Alexandru Petrescu 
> >> [mailto:alexandru.petrescu@gmail.com] Sent: Tuesday, April 22, 2008
> >> 7:44 PM To: heejin.jang@samsung.com Cc: Jari Arkko; mext@ietf.org
> >> Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
> >> 
> >> Hi Heejin, thanks for the reply, [...]
> >>>>> 3.1.  Home Network Information Option
> >>>>> 
> >>>>> This option is proposed to allow the exchange of home network  
> >>>>> information between the mobile node (DHCP client) and the DHCP 
> >>>>> server.  It is used to indicate the target home network
> >>>> requested by the mobile node to the DHCP server in the 
> >>>> Information-request
> >>>>> message.  In the Reply message, it conveys the home network 
> >>>>> information assigned by the DHCP server to the mobile node.
> >>>> The MN indicates the home network information to DHCP 
> Server, and 
> >>>> then the DHCP Server indicates back to MN the home network  
> >>>> information.  Is this information the same?  Can it change?
> >>> It can change. As described 4.3, the server provides the
> >> home network
> >>> information according the id-type in the request. For e.g., if 
> >>> id-type = 0 is in the request, the server returns the configured  
> >>> local information irrespective of information received from NAS.
> >>> 
> >> I'm not sure current semantics of DHCP exchanges between 
> Client and  
> >> Server allow the Client to send information to Server and 
> Server to 
> >> send it back Information that changed.  Isn't the proposal a 
> >> departure from the DHCP semantics?
> > 
> > HN info option is used differently in the request & reply, 
> > respectively. In the request, it specifies its preference where the 
> > home information is assigned. while, in the request, it carries the 
> > information provided by the server.
> 
> Ok.  Is there another example of non-mip6 information 
> exchanged with DHCP that follows this kind of logic?
> 
> For example, is there an existing DHCPv6 possibility for 
> Client to suggest e.g. Printer-Address to Server and Server 
> reply back to Client another Printer-Address?  Or some other 
> information: DNS Server suggested by Client and suggested 
> back differently by Server, or similar example.

Server does not reply differently. Once MN sends a preference about
HA's location with an id-type field, then server replies with the
corresponding HA information that satisfies a preference in the request. 

> >>>> If the MN knows the home network information then why 
> does it need 
> >>>> the DHCP Server to tell it back the home network information?
> >>> This is a part of integrated-bootstrapping scenario. So, 
> if the MN 
> >>> knows its home information, it does not need to send an 
> >>> Information-request at all.
> >> So why does the draft say that the "[Home Network 
> Information Option] 
> >> is used to indicate the target home network requested by 
> the mobile 
> >> node to the DHCP server in the Information-request message."
> > 
> > As document saids, the procedures follow the stateless DHCPv6. So, 
> > only when the MN wants to retrieve the required information, it 
> > intiates the stateless DHCPv6.
> 
> I'm not sure I understand you.  First, do you mean the 
> "Stateless DHCPv6" described in RFC3736?

Yes.

> I think that RFC doesn't suggest the Client to put data in a 
> request and the Server to suggest back a different data.  Or, 
> apparently, a hiopt-13 Client puts  IPv6 home network prefix 
> in a Request, with sub-opt-code equal 2, Relay forwards it to 
> Server, and Server puts another IPv6 home network prefix in a 
> Reply, apparently.  Is this the intended hiop-13 behaviour?
> 
> Is this behaviour in this sense completely different than the typical
> DHCPv6 operation?

Section 3.3 says

" While the Sub-opt-code 1 is only available in both the requesting and
   the returned Home Network Information options, Sub-opt-codes 2, 3, 4,
   and 5 are available only in the returned Home Network Information
   option and the MIP6 Relay Agent option."

Section 4.1 says

 "  A value of 1 is the only Sub-opt-code available in the request."

An MN cannot carry sub-opt-codes other than 1. This means that
a sub-option in the request is used only to carry the MN's prefered 
target MSP in case of id-type 1 so that the server can reply the matching 
HA information.

So, the server never replys with "the different" data. 

> >>>> Is the home network prefix part of the home network information?
> >>> Yes. it is home network information but its use is 
> limited only to 
> >>> dynamic HA discovery. I mean, it cannot be used for address 
> >>> auto-configuration. I'm not sure I understood your questino well.
> >>> 
> >> I don't understand what is the available information at MN 
> prior to  
> >> doing DHCP.
> >> 
> >>>>> 4.3.  DHCP Server Behavior
> >>>>> 
> >>>>> When the server receives a Relay-forward message, it 
> may include 
> >>>>> the MIP6 Relay Agent option in case there was home information 
> >>>>> available for the mobile node at the relay.
> >>>> DHCP Server includes the MIP6 Relay Agent option into what?
> >>> See to Sec 3.2.
> >>> 
> >>> "The DHCP relay agent sends this option to the DHCP 
> server in the  
> >>> Relay-forward message."
> >> Ok that, but I wondered where does the DHCP Server put its 
> MIP6 Relay 
> >> Agent option in?  In what message?  Relay puts it in Relay-Forward 
> >> message, but the Server puts it in what?
> > 
> > Server puts the HN information option in the Reply, not MIP6 Relay 
> > option.
> 
> In the Relay-Reply or in the Reply?  I think the document 
> should be clear about this.

First of all Severs construct a Reply message, and then
it makes Rely-Reply with the Reply message before relaying the
messages to the relays. 

Actually, I mentioned it in detail in Section 4.3 previously (you can see 
this in hiopt-09), but it was commented to be deleted by Gen-art review results
(Francis) because it is too trivial.

In hiopt-09,

  " The DHCP server MUST follow the following logic to construct a Reply
   message with the Home Network Information option, and include the
   Reply message in the payload of a Relay Message option of Relay-reply
   message."

In hiopt-15,

  " It MUST construct the Home Network Information option(s) according to
   the following logic, and include it or them in the Reply."

> I would go as far as to suggest two new subsections (1) that 
> describes simply and clearly the overall hiopt message 
> exchanges and (2) list a concentrate of what are the 
> modifications to DHCPv6 RFC3315 that this document suggests.  
> A subsection picturing the topology involved wouldn't hurt either.

The complete procedures and the message flow figure are
described in the integrated-scenario draft.
 
> > Sever replies with the HN information option according to 
> the HN info 
> > option in the request, based on the collected information which may 
> > have been delivered from NAS with MIP6 relay option or 
> pre-configured 
> > by admin.
> 
> I don't understand how the Reply is based on the collected 
> information.
>   To understand that, the hiopt-13 draft suggests reading 
> mip6-integrated, mip6-bootstrapping-integrated-dhc and 
> mip6-radius drafts.

Alex. This has been discussed in MIP6 WG long before. 
Over one year ago (or more than that) there has been discussion 
on the merge of this draft and integrated-draft, and finally the concensus
was to make them separated. I don't think we need to mention this
again now.
 
> Could hiopt-13 document be made standalone, so I could 
> understand it without reading other documents?

> > This is described in the 1st paragraph of Sec 4.3.
> 
> Ok.  It should say Relay-Reply sometimes, not only Reply.
> 
> >>>>> New DHCP options are defined which allow a mobile node 
> to request 
> >>>>> the home agent IP address, FQDN, or home network prefix 
> and obtain 
> >>>>> it via the DHCP response.
> >>>> If this is a MN, then it could be a MR, and MR may need to learn 
> >>>> Mobile Network Prefixes.  Is it necessary to learn 
> Mobile Network 
> >>>> Prefixes as well?  Just a question.
> >>> As answered previously, the prefix is provided only for 
> dynamic HA 
> >>> discovery, not for auto-configuration or MIP6 binding. In
> >> that sense,
> >>> I don't think the MNP discovery is in the scope of this document.
> >>> 
> >> Ok.
> >> 
> >>>>> A mobile node can indicate its home network identity 
> when roaming 
> >>>>> to a visited network in order to obtain the MIP6 bootstrap 
> >>>>> parameters from the home network.  As an example, the visited 
> >>>>> network may determine the home network of the mobile 
> node based on 
> >>>>> the realm portion of the NAI (Network Access 
> Identifier) [RFC4282] 
> >>>>> used in access authentication.
> >>>> This is not a good example, it is not a good idea to decide the  
> >>>> identity of a subnet based on the realm part of NAI.  
> There is no 
> >>>> relationship about domain names and subnet addresses, and there 
> >>>> shouldn't be any.  If one needs to identify a subnet 
> then it's by 
> >>>> its IP subnet address, not by its fqdn (there's no fqdn-subnet 
> >>>> relationship).
> >>> This is not about deciding the identity of a subnet from 
> NAI. For  
> >>> e.g., if my NAI is heejin.jang@samsung.com, it can be
> >> assumed that my ISP is samsung. This is just one of possible 
> >> scenarios.
> >> 
> >> I'm sure this is impossible.  samsung has many subnets.  It's 
> >> impossible to identify all samsung's subnets only by one realm 
> >> samsung.com.
> >> 
> >> HA acts on a subnet (HA and subnet are tightly related by HA doing 
> >> proxy ND) not across an entire domain.  Most often a 
> domain is made 
> >> of several subnets.
> >> 
> >> That's why I thought it's not a good example.
> > 
> > There can be many deployment ways to enable the scenario. For e.g.,
> > 
> > 1) the server simply returns the HN prefix. Then the MN perform 
> > dynamic HN discovery according to rfc3775.
> 
> Ok, but the NAI identification of a subnet is still a wrong 
> example, right?

See below.

> > 2) the NAS is configured a proper HA info. For example, AAA 
> server may 
> > deliver to NAS the nearest HA info considering each NAS's location 
> > such as "ha_philly.samsung.com" in Philly.
> 
> And thus DHCP is not involved, right?

The NAS will deliver the information to the server finally
by using MIP6 relay agent option, so DHCP is involved here.

> > 2) suppose the server replied with the FQDN ("ha.samsung.com").
> > 
> > But it does not necessarily mean phisycally a single HA 
> instance all 
> > the time. The fqdn may be shared among multiple HAs and dns 
> server may 
> > return the different IP based on a source IP of the DNS request or 
> > simply as a round-robin.
> 
> This is typically what happens with VPN servers, not Home 
> Agents.  It is very rare if at all feasible to use a Home 
> Agent as a VPN Server.
> 
> The goals of a HA (mainly support continuous sessions and 
> permanent publicly reachable HoA) are completely different 
> than the goals of a VPN Server (mainly offering secure access 
> to private non-reachable network).
>   These goals are completely different.
> 
> It is wrong to give an example of HA when you actually mean 
> VPN.  Please use VPN in the above description.

Such method is very well-known and typical method for load-balancing. 

> > There can be multiple ways to implement this. however, how to do 
> > depends on deployment policy, and not in the scope of the hiopt 
> > document.
> 
> Please don't redirect me to policy.
> 
> Thanks,
> 
> Alex
> 
> 
> ______________________________________________________________________
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Subject: Re: [MEXT] why having DHCP do DNS resolution? (was: FW: Summary for
 the changes in hiopt-13)
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Heejin Jang wrote:
>> For example, is there an existing DHCPv6 possibility for Client to
>>  suggest e.g. Printer-Address to Server and Server reply back to 
>> Client another Printer-Address?  Or some other information: DNS 
>> Server suggested by Client and suggested back differently by 
>> Server, or similar example.
> 
> Server does not reply differently. Once MN sends a preference about 
> HA's location with an id-type field, then server replies with the 
> corresponding HA information that satisfies a preference in the 
> request.

Ok, I retain this.  Thanks for the clarification.

>>>>>> If the MN knows the home network information then why does
>>>>>>  it need the DHCP Server to tell it back the home network 
>>>>>> information? This is a part of integrated-bootstrapping 
>>>>>> scenario. So, if the MN knows its home information, it does
>>>>>>  not need to send an Information-request at all. So why 
>>>>>> does the draft say that the "[Home Network Information 
>>>>>> Option] is used to indicate the target home network 
>>>>>> requested by the mobile node to the DHCP server in the 
>>>>>> Information-request message." As document saids, the 
>>>>>> procedures follow the stateless DHCPv6. So, only when the 
>>>>>> MN wants to retrieve the required information, it intiates
>>>>>>  the stateless DHCPv6.
>> 
>> I'm not sure I understand you.  First, do you mean the "Stateless 
>> DHCPv6" described in RFC3736?
> 
> Yes.

Then I don't see why stateless DHCPv6 is needed for this?  Plain full
DHCPv6 can accommodate this scenario.

>> I think that RFC doesn't suggest the Client to put data in a 
>> request and the Server to suggest back a different data.  Or, 
>> apparently, a hiopt-13 Client puts  IPv6 home network prefix in a 
>> Request, with sub-opt-code equal 2, Relay forwards it to Server, 
>> and Server puts another IPv6 home network prefix in a Reply, 
>> apparently.  Is this the intended hiop-13 behaviour?
>> 
>> Is this behaviour in this sense completely different than the 
>> typical DHCPv6 operation?
> 
> Section 3.3 says
> 
> " While the Sub-opt-code 1 is only available in both the requesting 
> and the returned Home Network Information options, Sub-opt-codes 2, 
> 3, 4, and 5 are available only in the returned Home Network 
> Information option and the MIP6 Relay Agent option."
> 
> Section 4.1 says
> 
> "  A value of 1 is the only Sub-opt-code available in the request."
> 
> An MN cannot carry sub-opt-codes other than 1. This means that a 
> sub-option in the request is used only to carry the MN's prefered 
> target MSP in case of id-type 1 so that the server can reply the 
> matching HA information.
> 
> So, the server never replys with "the different" data.

Right, thanks, now I understand it better as being the basic hiopt
behaviour.

Let me agree with you for a short while that it's good to identify the
subnet by a FQDN.

If so basically MN (DHCP Client) puts FQDN in the request and the DHCP
Server sends back an IP address of the Home Agent.

How is this different than DNS Resolution?  Why do we need DHCP
to do DNS Resolution?

>> In the Relay-Reply or in the Reply?  I think the document should be
>>  clear about this.
> 
> First of all Severs construct a Reply message, and then it makes 
> Rely-Reply with the Reply message before relaying the messages to the
>  relays.
> 
> Actually, I mentioned it in detail in Section 4.3 previously (you can
>  see this in hiopt-09), but it was commented to be deleted by Gen-art
>  review results (Francis) because it is too trivial.
> 
> In hiopt-09,
> 
> " The DHCP server MUST follow the following logic to construct a 
> Reply message with the Home Network Information option, and include 
> the Reply message in the payload of a Relay Message option of 
> Relay-reply message."
> 
> In hiopt-15,
> 
> " It MUST construct the Home Network Information option(s) according
>  to the following logic, and include it or them in the Reply."

Ah ok, thanks for the gen-art explanation.  It's not trivial to me as
implementor.

>> I would go as far as to suggest two new subsections (1) that 
>> describes simply and clearly the overall hiopt message exchanges 
>> and (2) list a concentrate of what are the modifications to DHCPv6
>>  RFC3315 that this document suggests. A subsection picturing the 
>> topology involved wouldn't hurt either.
> 
> The complete procedures and the message flow figure are described in
>  the integrated-scenario draft.

You mean that this (hiopt) draft can not work without the
integrated-scenario draft?

>>> Sever replies with the HN information option according to the HN 
>>> info option in the request, based on the collected information 
>>> which may have been delivered from NAS with MIP6 relay option or
>>>  pre-configured by admin.
>> 
>> I don't understand how the Reply is based on the collected 
>> information. To understand that, the hiopt-13 draft suggests 
>> reading mip6-integrated, mip6-bootstrapping-integrated-dhc and 
>> mip6-radius drafts.
> 
> Alex. This has been discussed in MIP6 WG long before. Over one year 
> ago (or more than that) there has been discussion on the merge of 
> this draft and integrated-draft, and finally the concensus was to 
> make them separated. I don't think we need to mention this again now.

Ok.  I wanted to understand hiopt separately but if you think it
absolutely needs integrated-scenario then so be it.

>>> 2) the NAS is configured a proper HA info. For example, AAA 
>>> server may deliver to NAS the nearest HA info considering each
>>> NAS's location such as "ha_philly.samsung.com" in Philly.
>> 
>> And thus DHCP is not involved, right?
> 
> The NAS will deliver the information to the server finally by using 
> MIP6 relay agent option, so DHCP is involved here.

If the 'NAS' is a DHCP Relay I'd prefer to always call it DHCP Relay
instead of NAS.

Generally, it's good to me to have as few entities as possible.

>>> 2) suppose the server replied with the FQDN ("ha.samsung.com").
>>> 
>>> But it does not necessarily mean phisycally a single HA instance 
>>> all the time. The fqdn may be shared among multiple HAs and dns 
>>> server may return the different IP based on a source IP of the 
>>> DNS request or simply as a round-robin.
>> 
>> This is typically what happens with VPN servers, not Home Agents. 
>> It is very rare if at all feasible to use a Home Agent as a VPN 
>> Server.
>> 
>> The goals of a HA (mainly support continuous sessions and permanent
>>  publicly reachable HoA) are completely different than the goals of
>>  a VPN Server (mainly offering secure access to private 
>> non-reachable network). These goals are completely different.
>> 
>> It is wrong to give an example of HA when you actually mean VPN. 
>> Please use VPN in the above description.
> 
> Such method is very well-known and typical method for load-balancing.

I'm sorry I'm afraid there are many things mixed up here.

MIP6 HAs do load-balancing in the form of DHAAD.  How do VPN Servers do
load balancing, which RFC?  I'm sure it's different than what MIP6 does.

Why mixing VPN and HA concepts here?

And finally, I completely disagree identifying a subnet with a FQDN.  I 
also disagree relying the workings of a protocol on that identification.

That said, we seem to be in complete respectful disagreement.

Alex


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From mext-bounces@ietf.org  Mon Apr 28 01:20:03 2008
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We're not changing the document structure. Hiopt contains the options,
the bootstrapping document contains the bigger picture. The readers have
to read all...

Jari

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From mext-bounces@ietf.org  Mon Apr 28 03:41:42 2008
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Alex,

>> Section 3.3 says
>>
>> " While the Sub-opt-code 1 is only available in both the requesting
>> and the returned Home Network Information options, Sub-opt-codes 2,
>> 3, 4, and 5 are available only in the returned Home Network
>> Information option and the MIP6 Relay Agent option."
>>
>> Section 4.1 says
>>
>> "  A value of 1 is the only Sub-opt-code available in the request."
>>
>> An MN cannot carry sub-opt-codes other than 1. This means that a
>> sub-option in the request is used only to carry the MN's prefered
>> target MSP in case of id-type 1 so that the server can reply the
>> matching HA information.
>>
>> So, the server never replys with "the different" data.
>
> Right, thanks, now I understand it better as being the basic hiopt
> behaviour.
>
> Let me agree with you for a short while that it's good to identify the
> subnet by a FQDN.
>
> If so basically MN (DHCP Client) puts FQDN in the request and the DHCP
> Server sends back an IP address of the Home Agent.
>
> How is this different than DNS Resolution?  Why do we need DHCP
> to do DNS Resolution? 

Having DHCP provide address and other parameter information relating to
services is an established practice. This draft is no different from
that. I would expect one simple use case for the draft to be sending a
request with no preference and getting back an address for an HA. This
cannot be done with DNS. Similarly, even where you do have a preference,
DNS does not easily allow the response to be decided based on local
policy, proximity of the home agent, etc.

>>> I would go as far as to suggest two new subsections (1) that
>>> describes simply and clearly the overall hiopt message exchanges and
>>> (2) list a concentrate of what are the modifications to DHCPv6
>>>  RFC3315 that this document suggests. A subsection picturing the
>>> topology involved wouldn't hurt either.
>>
>> The complete procedures and the message flow figure are described in
>>  the integrated-scenario draft.
>
> You mean that this (hiopt) draft can not work without the
> integrated-scenario draft?

No, hiopt is the technical content that needs to be implemented. But to
understand the overall system behavior, rationale, etc. one has to read
other documents, too.

Jari

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Subject: Re: [MEXT] why having DHCP do DNS resolution?
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Jari Arkko wrote:
> Alex,
> 
>>> Section 3.3 says
>>> 
>>> " While the Sub-opt-code 1 is only available in both the 
>>> requesting and the returned Home Network Information options, 
>>> Sub-opt-codes 2, 3, 4, and 5 are available only in the returned 
>>> Home Network Information option and the MIP6 Relay Agent option."
>>> 
>>> 
>>> 
>>> 
>>> Section 4.1 says
>>> 
>>> "  A value of 1 is the only Sub-opt-code available in the 
>>> request."
>>> 
>>> An MN cannot carry sub-opt-codes other than 1. This means that a 
>>> sub-option in the request is used only to carry the MN's prefered
>>> target MSP in case of id-type 1 so that the server can reply the
>>> matching HA information.
>>> 
>>> So, the server never replys with "the different" data.
>> Right, thanks, now I understand it better as being the basic hiopt 
>> behaviour.
>> 
>> Let me agree with you for a short while that it's good to identify
>>  the subnet by a FQDN.
>> 
>> If so basically MN (DHCP Client) puts FQDN in the request and the 
>> DHCP Server sends back an IP address of the Home Agent.
>> 
>> How is this different than DNS Resolution?  Why do we need DHCP to
>>  do DNS Resolution?
> 
> Having DHCP provide address and other parameter information relating
>  to services is an established practice. This draft is no different 
> from that. I would expect one simple use case for the draft to be 
> sending a request with no preference and getting back an address for
>  an HA.

That yes.  The simplest case like that makes a lot of sense to me too.
Should be described alone I believe, put first and foremost.

This could be described in a much shorter document.  It could be
described independently of the bootsrapping-integrated scenario.

The current hiopt document puts "A part of the solution is the
capability to deliver home network prefix information to the mobile node
by means of the stateless DHCPv6 [RFC3736] [RFC3315]." first in Section
1 Introduction, first paragraph.

Or, "home network prefix information" is much more that what you're
saying "an address for an HA".

The simplest and most straightforward DHCP options is to have them in
the Reply only.  The Solicit and/or Request already have many
identifiers (NAI, MAC address), no need to add new ones.

Why do people think there's a need for new identifiers in the Request?

> This cannot be done with DNS.

Well, yes, more or less, there is multicast DNS that could address this
request, but not much widely deployed.

>>>> I would go as far as to suggest two new subsections (1) that 
>>>> describes simply and clearly the overall hiopt message 
>>>> exchanges and (2) list a concentrate of what are the 
>>>> modifications to DHCPv6 RFC3315 that this document suggests. A
>>>>  subsection picturing the topology involved wouldn't hurt 
>>>> either.
>>> The complete procedures and the message flow figure are described
>>>  in the integrated-scenario draft.
>> You mean that this (hiopt) draft can not work without the 
>> integrated-scenario draft?
> 
> No, hiopt is the technical content that needs to be implemented. But
>  to understand the overall system behavior, rationale, etc. one has
> to read other documents, too.

Jari, sorry, I don't agree.  The paragraph that disturbs me most is the
following:
> The Mobile IPv6 specification [RFC3775] describes how home agents can
>  be dynamically discovered by mobile nodes that know the home network
>  prefix.  This scheme does not work when prefix information is not 
> already available to the mobile node.  One architecture to solve this
>  problem is described in
> [I-D.ietf-mip6-bootstrapping-integrated-dhc].

If there's a need to specify architecture it's good to specify them
separately from protocols, IMHO.  Have protocols work with whatever
architecture one may come up with.

Sorry, I will stop here,

Alex


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Subject: Re: [MEXT] why having DHCP do DNS resolution? (was: FW: Summary for
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Hi, Alex. 
See below.

ps> I'm supposed to have a vacation till next Monday, 
and cannot access my samsung account.
So kindly refer my gmail account as well. 
(lprosee@gmail.com)

> -----Original Message-----
> From: Alexandru Petrescu [mailto:alexandru.petrescu@gmail.com] 
> Sent: Monday, April 28, 2008 4:39 PM
> To: heejin.jang@samsung.com
> Cc: Jari Arkko; mext@ietf.org
> Subject: Re: why having DHCP do DNS resolution? (was: [MEXT] 
> FW: Summary for the changes in hiopt-13)
> 
> Heejin Jang wrote:
> >> For example, is there an existing DHCPv6 possibility for 
> Client to  
> >> suggest e.g. Printer-Address to Server and Server reply back to 
> >> Client another Printer-Address?  Or some other information: DNS 
> >> Server suggested by Client and suggested back differently 
> by Server, 
> >> or similar example.
> > 
> > Server does not reply differently. Once MN sends a preference about 
> > HA's location with an id-type field, then server replies with the 
> > corresponding HA information that satisfies a preference in the 
> > request.
> 
> Ok, I retain this.  Thanks for the clarification.
> 
> >>>>>> If the MN knows the home network information then why does  it 
> >>>>>> need the DHCP Server to tell it back the home network 
> >>>>>> information? This is a part of 
> integrated-bootstrapping scenario. 
> >>>>>> So, if the MN knows its home information, it does  not need to 
> >>>>>> send an Information-request at all. So why does the draft say 
> >>>>>> that the "[Home Network Information Option] is used to 
> indicate 
> >>>>>> the target home network requested by the mobile node 
> to the DHCP 
> >>>>>> server in the Information-request message." As document saids, 
> >>>>>> the procedures follow the stateless DHCPv6. So, only 
> when the MN 
> >>>>>> wants to retrieve the required information, it intiates  the 
> >>>>>> stateless DHCPv6.
> >> 
> >> I'm not sure I understand you.  First, do you mean the "Stateless 
> >> DHCPv6" described in RFC3736?
> > 
> > Yes.
> 
> Then I don't see why stateless DHCPv6 is needed for this?  Plain full
> DHCPv6 can accommodate this scenario.

Basically plain (stateful) DHCPv6 is used for address configuration while 
stateless DHCPv6 is for other parameters configuration such as DNS server 
address. So this HN information should be delivered through stateless
DHCPv6.

> >> I think that RFC doesn't suggest the Client to put data in 
> a request 
> >> and the Server to suggest back a different data.  Or, 
> apparently, a 
> >> hiopt-13 Client puts  IPv6 home network prefix in a Request, with 
> >> sub-opt-code equal 2, Relay forwards it to Server, and Server puts 
> >> another IPv6 home network prefix in a Reply, apparently.  
> Is this the 
> >> intended hiop-13 behaviour?
> >> 
> >> Is this behaviour in this sense completely different than 
> the typical 
> >> DHCPv6 operation?
> > 
> > Section 3.3 says
> > 
> > " While the Sub-opt-code 1 is only available in both the requesting 
> > and the returned Home Network Information options, 
> Sub-opt-codes 2, 3, 
> > 4, and 5 are available only in the returned Home Network 
> Information 
> > option and the MIP6 Relay Agent option."
> > 
> > Section 4.1 says
> > 
> > "  A value of 1 is the only Sub-opt-code available in the request."
> > 
> > An MN cannot carry sub-opt-codes other than 1. This means that a 
> > sub-option in the request is used only to carry the MN's prefered 
> > target MSP in case of id-type 1 so that the server can reply the 
> > matching HA information.
> > 
> > So, the server never replys with "the different" data.
> 
> Right, thanks, now I understand it better as being the basic 
> hiopt behaviour.
> 
> Let me agree with you for a short while that it's good to 
> identify the subnet by a FQDN.
> 
> If so basically MN (DHCP Client) puts FQDN in the request and 
> the DHCP Server sends back an IP address of the Home Agent.
> 
> How is this different than DNS Resolution?  Why do we need 
> DHCP to do DNS Resolution?

While MNs are required to know an exact FQDN of the target (HA)
for DNS resolution, DHCP discovery enables HA discovery in variable ways
even in case MN does not have exact information about its home network. 
For e.g. it can request the local HAs with the id-type 0. 
Or the server may return partially matching HA information as described in 
Section 4.3. 

> >> In the Relay-Reply or in the Reply?  I think the document 
> should be  
> >> clear about this.
> > 
> > First of all Severs construct a Reply message, and then it makes 
> > Rely-Reply with the Reply message before relaying the 
> messages to the  
> > relays.
> > 
> > Actually, I mentioned it in detail in Section 4.3 
> previously (you can  
> > see this in hiopt-09), but it was commented to be deleted 
> by Gen-art  
> > review results (Francis) because it is too trivial.
> > 
> > In hiopt-09,
> > 
> > " The DHCP server MUST follow the following logic to 
> construct a Reply 
> > message with the Home Network Information option, and include the 
> > Reply message in the payload of a Relay Message option of 
> Relay-reply 
> > message."
> > 
> > In hiopt-15,
> > 
> > " It MUST construct the Home Network Information option(s) 
> according  
> > to the following logic, and include it or them in the Reply."
> 
> Ah ok, thanks for the gen-art explanation.  It's not trivial 
> to me as implementor.

Ok.
 
> >> I would go as far as to suggest two new subsections (1) that 
> >> describes simply and clearly the overall hiopt message 
> exchanges and 
> >> (2) list a concentrate of what are the modifications to DHCPv6
> >>  RFC3315 that this document suggests. A subsection picturing the 
> >> topology involved wouldn't hurt either.
> > 
> > The complete procedures and the message flow figure are 
> described in  
> > the integrated-scenario draft.
> 
> You mean that this (hiopt) draft can not work without the 
> integrated-scenario draft?
> 
> >>> Sever replies with the HN information option according to the HN 
> >>> info option in the request, based on the collected 
> information which 
> >>> may have been delivered from NAS with MIP6 relay option or  
> >>> pre-configured by admin.
> >> 
> >> I don't understand how the Reply is based on the collected 
> >> information. To understand that, the hiopt-13 draft 
> suggests reading 
> >> mip6-integrated, mip6-bootstrapping-integrated-dhc and mip6-radius 
> >> drafts.
> > 
> > Alex. This has been discussed in MIP6 WG long before. Over one year 
> > ago (or more than that) there has been discussion on the 
> merge of this 
> > draft and integrated-draft, and finally the concensus was 
> to make them 
> > separated. I don't think we need to mention this again now.
> 
> Ok.  I wanted to understand hiopt separately but if you think 
> it absolutely needs integrated-scenario then so be it.
> 
> >>> 2) the NAS is configured a proper HA info. For example, 
> AAA server 
> >>> may deliver to NAS the nearest HA info considering each NAS's 
> >>> location such as "ha_philly.samsung.com" in Philly.
> >> 
> >> And thus DHCP is not involved, right?
> > 
> > The NAS will deliver the information to the server finally by using
> > MIP6 relay agent option, so DHCP is involved here.
> 
> If the 'NAS' is a DHCP Relay I'd prefer to always call it 
> DHCP Relay instead of NAS.
> 
> Generally, it's good to me to have as few entities as possible.
> 
> >>> 3) suppose the server replied with the FQDN ("ha.samsung.com").
> >>> 
> >>> But it does not necessarily mean phisycally a single HA 
> instance all 
> >>> the time. The fqdn may be shared among multiple HAs and 
> dns server 
> >>> may return the different IP based on a source IP of the 
> DNS request 
> >>> or simply as a round-robin.
> >> 
> >> This is typically what happens with VPN servers, not Home Agents. 
> >> It is very rare if at all feasible to use a Home Agent as a VPN 
> >> Server.
> >> 
> >> The goals of a HA (mainly support continuous sessions and 
> permanent  
> >> publicly reachable HoA) are completely different than the 
> goals of  a 
> >> VPN Server (mainly offering secure access to private non-reachable 
> >> network). These goals are completely different.
> >> 
> >> It is wrong to give an example of HA when you actually mean VPN. 
> >> Please use VPN in the above description.
> > 
> > Such method is very well-known and typical method for 
> load-balancing.
> 
> I'm sorry I'm afraid there are many things mixed up here.
> 
> MIP6 HAs do load-balancing in the form of DHAAD.  How do VPN 
> Servers do load balancing, which RFC?  I'm sure it's 
> different than what MIP6 does.
> 
> Why mixing VPN and HA concepts here?
> 
> And finally, I completely disagree identifying a subnet with 
> a FQDN.  I also disagree relying the workings of a protocol 
> on that identification.
> 
> That said, we seem to be in complete respectful disagreement.

IMHO, such a load-balancing approach is wellknown and does not need to 
be limited to VPN. 
Anyway here the key point is "to provide HA information based on NAI" can be 
implemented in various ways as least by using 1) and 2)  as described in 
previous mails. 

> Alex
> 
> 
> ______________________________________________________________________
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Mobility EXTensions for IPv6 Working Group of the IETF.


	Title           : Multiple Care-of Addresses Registration
	Author(s)       : R. Wakikawa, et al.
	Filename        : draft-ietf-monami6-multiplecoa-07.txt
	Pages           : 44
	Date            : 2008-04-29

According to the current Mobile IPv6 specification, a mobile node may
have several care-of addresses, but only one, called the primary
care-of address, that can be registered with its home agent and the
correspondent nodes.  However, for matters of cost, bandwidth, delay,
etc, it is useful for the mobile node to get Internet access through
multiple accesses simultaneously, in which case the mobile node would
be configured with multiple active IPv6 care-of addresses.  This
document proposes extensions to the Mobile IPv6 protocol to register
and use multiple care-of addresses.  The extensions proposed in this
document can be used by Mobile Routers using the NEMO (Network
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Subject: [MEXT] FW: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
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Hello All,

Please find the latest Binding Revocation for IPv6 Mobility draft at the
below link.
We highly value your review and comments!

Many Thanks in advance!

Best Regards,
Ahmad


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A New Internet-Draft is available from the on-line Internet-Drafts
directories.

	Title           : Binding Revocation for IPv6 Mobility
	Author(s)       : A. Muhanna, et al.
	Filename        : draft-muhanna-mext-binding-revocation-00.txt
	Pages           : 32
	Date            : 2008-04-29

This document defines the revocation semantics for terminating a mobile
node's mobility session and associated resources.  These semantics are
generic enough and can be used by mobility entities in the case of
Client Mobile IPv6 and its extensions.  This mechanism allows the
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Hi all,

We submitted the new version of MCoA.

As we discussed at the previous meeting,
We will have the second WGLC to this -07 document.

regards,
ryuji



Begin forwarded message:
> From: Internet-Drafts@ietf.org
> Date: 2008 4/30 10:30:01:JST
> To: i-d-announce@ietf.org
> Cc: mext@ietf.org
> Subject: I-D Action:draft-ietf-monami6-multiplecoa-07.txt
>
> A New Internet-Draft is available from the on-line Internet-Drafts  
> directories.
> This draft is a work item of the Mobility EXTensions for IPv6  
> Working Group of the IETF.
>
>
> 	Title           : Multiple Care-of Addresses Registration
> 	Author(s)       : R. Wakikawa, et al.
> 	Filename        : draft-ietf-monami6-multiplecoa-07.txt
> 	Pages           : 44
> 	Date            : 2008-04-29
>
> According to the current Mobile IPv6 specification, a mobile node may
> have several care-of addresses, but only one, called the primary
> care-of address, that can be registered with its home agent and the
> correspondent nodes.  However, for matters of cost, bandwidth, delay,
> etc, it is useful for the mobile node to get Internet access through
> multiple accesses simultaneously, in which case the mobile node would
> be configured with multiple active IPv6 care-of addresses.  This
> document proposes extensions to the Mobile IPv6 protocol to register
> and use multiple care-of addresses.  The extensions proposed in this
> document can be used by Mobile Routers using the NEMO (Network
> Mobility) Basic Support protocol as well.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-monami6-multiplecoa-07.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.

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> _______________________________________________
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Date: Tue, 29 Apr 2008 22:53:13 -0700
From: "Vijay Devarapallli" <dvijay@gmail.com>
To: "Jari Arkko" <jari.arkko@piuha.net>, heejin.jang@samsung.com
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Subject: Re: [MEXT] FW: Summary for the changes in hiopt-13
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Hi Jari, Heejin,

Its been a while since I looked at this document. A few minor comments.

The IANA registry for the sub-opt-code in the Home Network Information
option and the MIP6 Relay agent option should be relaxed to "Standards
Action or IESG approval". It would be good if the sub-opt-code can be
extended to carry additional pieces of information using Experimental
or Informational RFCs in the future. Mentioning "Standards Action"
means the sub-opt-code can only be extended by Standards Track RFCs.
This would require a minor change in the IANA considerations section.

I think a new registry should be created for the Id-type field in the
Home Network Information option (section 3.1). This is missing in the
IANA considerations section. Another minor comment related to this.
The value '0' should be used to indicate that the MN has no
preference, instead of the value '2' being used for no preference and
'0' used for visited domain home agent information. That seems more
conventional. But if this needs too many changes in the document, don'
t bother.

Finally, the introduction needs to be slightly re-written to say that
the main goal of this document is to deliver the  home agent
information to the mobile node using stateless DHCPv6. It currently
seems to say that the mail goal is to deliver a prefix so that the
mobile node can run DHAAD using that prefix. I don't remember if the
introduction always used to say this or if it was changed recently.

The document otherwise looks fine. Ready for approval by the IESG. :)

Vijay

On Mon, Apr 21, 2008 at 12:16 AM, Jari Arkko <jari.arkko@piuha.net> wrote:
> The last edits are in -15 now. Any additional people who want to comment
>  on this before its approved?
>
>  Jari
>
>
>
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Subject: Re: [MEXT] why having DHCP do DNS resolution? (was: FW: Summary for
 the changes in hiopt-13)
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Heejin Jang wrote:
> Hi, Alex. See below.
> 
> ps> I'm supposed to have a vacation till next Monday, and cannot 
> access my samsung account. So kindly refer my gmail account as well.

Heejin, enjoy vacations :-)  when back in office see below.

[...]
>> Then I don't see why stateless DHCPv6 is needed for this?  Plain 
>> full DHCPv6 can accommodate this scenario.
> 
> Basically plain (stateful) DHCPv6 is used for address configuration 
> while stateless DHCPv6 is for other parameters configuration such as
>  DNS server address. So this HN information should be delivered 
> through stateless DHCPv6.

Let's clarify this use of Stateless DHCPv6 RFC3736.

Why does a hiopt MN need to include a Home Network Identifier
(Sub-Opt-Code 1, eg realm of NAI) in the Home Network Information Option
in the Information-Request?  Why isn't it sufficient to use the Client
Identifier Option DUID section 22.2 of RFC 3315 DHCPv6.

Why isn't the DUID enough to identify the Client (1 - Link-layer address
plus time, 2 - vendor-assigned unique id based on enterprise number, 3 -
link-layer address).

Why is it thought that it is necessary to specify Home Network
Identifier Sub-Opt-Code 1 as being, for example, the realm part of a
NAI, when the DUID exists, is used and covers a different range of cases.

>>>> I think that RFC doesn't suggest the Client to put data in a 
>>>> request and the Server to suggest back a different data.  Or, 
>>>> apparently, a hiopt-13 Client puts  IPv6 home network prefix in
>>>>  a Request, with sub-opt-code equal 2, Relay forwards it to 
>>>> Server, and Server puts another IPv6 home network prefix in a 
>>>> Reply, apparently. Is this the intended hiop-13 behaviour?
>>>> 
>>>> Is this behaviour in this sense completely different than the 
>>>> typical
>>>> 
>>>> DHCPv6 operation?
>>> 
>>> Section 3.3 says
>>> 
>>> " While the Sub-opt-code 1 is only available in both the 
>>> requesting and the returned Home Network Information options, 
>>> Sub-opt-codes 2, 3, 4, and 5 are available only in the returned 
>>> Home Network Information option and the MIP6 Relay Agent option."
>>> 
>>> 
>>> 
>>> 
>>> 
>>> Section 4.1 says
>>> 
>>> "  A value of 1 is the only Sub-opt-code available in the 
>>> request."

Right, now makes better sense.  For easing my humble reading this
statement could appear in section 3.1 where the message encoding of Home
Network Information Option is described.

>>> An MN cannot carry sub-opt-codes other than 1. This means that a
>>>  sub-option in the request is used only to carry the MN's
>>> prefered target MSP in case of id-type 1 so that the server can
>>> reply the matching HA information.
>>> 
>>> So, the server never replys with "the different" data.
>> Right, thanks, now I understand it better as being the basic hiopt
>>  behaviour.
>> 
>> Let me agree with you for a short while that it's good to identify
>>  the subnet by a FQDN.
>> 
>> If so basically MN (DHCP Client) puts FQDN in the request and the 
>> DHCP Server sends back an IP address of the Home Agent.
>> 
>> How is this different than DNS Resolution?  Why do we need DHCP to
>>  do DNS Resolution?
> 
> While MNs are required to know an exact FQDN of the target (HA) for 
> DNS resolution, DHCP discovery enables HA discovery in variable ways 
> even in case MN does not have exact information about its home 
> network. For e.g. it can request the local HAs with the id-type 0. Or
>  the server may return partially matching HA information as described
>  in Section 4.3.

I agree at high level but not in detail.

The really big problem here - and in all bootstrapping documents - is
that we have not precisely described what is the information available
at the MN prior to bootstrapping phase.  Different documents make
different assumptions and they overlap.

[skipped some for focusing the discussion]

> IMHO, such a load-balancing approach is wellknown and does not need 
> to be limited to VPN. Anyway here the key point is "to provide HA 
> information based on NAI" can be implemented in various ways as least
>  by using 1) and 2)  as described in previous mails.

If it is the key point then it should be much more clear than that.
It is far from being clear.  Now here it's said "NAI" but in the
document it's said "for example, the realm part of NAI".  If we decide
to do only NAI-based HA address bootstrapping with DHCPv6 then I can
agree we can have a better document.

That is a big if.

Because - does DHCPv6 or DHCPv4 ever use NAI for address allocation or
parameter configuration?  I don't think so.  They use MAC address (or
DUID) but not NAI.  I find hiopt very much different than DHCPv6 in this
sense.  IMHO. ?.

If one wants to use NAI (or its realm part) to find the corresponding IP
address then use DNS straight resolution, not DHCP.

Alex


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Subject: [MEXT] WGLC for draft-ietf-monami6-multiplecoa-07.txt
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Hi,

This is the WGLC for draft-ietf-monami6-multiplecoa-07.txt. Please check 
if all the issues that were raised have been addressed in this new 
version. If you have issues with the document, please raise them. If you 
are ok with the document and you think it should be sent to the ISEG, 
please also say so. Provide comments till may 14.
For your convinience, the document can be found at:

	Title           : Multiple Care-of Addresses Registration
	Author(s)       : R. Wakikawa, et al.
	Filename        : draft-ietf-monami6-multiplecoa-07.txt
	Pages           : 44
	Date            : 2008-04-29


A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-monami6-multiplecoa-07.txt

Regards, Julien and marcelo

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Date: Wed, 30 Apr 2008 11:04:42 -0700
From: "Vijay Devarapallli" <dvijay@gmail.com>
To: "Ahmad Muhanna" <amuhanna@nortel.com>
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Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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Hi Ahmad and others,

We previously had a discussion on this draft on the MIP6 mailing list
and it was agreed that the binding revocation message will be a
sub-type in the Generic Notification Message.
http://www.ietf.org/internet-drafts/draft-haley-mext-generic-notification-message-00.txt

We would need to modify the generic notification message to include a
new 'subtype' field. We had discussed this in the past and made no
progress. We can start with the following values

0 - Reserved, not used
1 - Notification message indicated by Mobility Options
2 - Binding Revocation Indication
3 - Binding Revocation Acknowledgement
4-255 reserved

The Generic Notification message draft is quite simple and shouldn't
take too long to standardize. It would be a good idea to use the
Generic Notification message as much as
possible when you have something to notify to either the mobile node
or the home agent. Otherwise we might end up with a proliferation of
notification messages using up a lot of mobility header message types.

Vijay

On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna <amuhanna@nortel.com> wrote:
> Hello All,
>
>  Please find the latest Binding Revocation for IPv6 Mobility draft at the
>  below link.
>  We highly value your review and comments!
>
>  Many Thanks in advance!
>
>  Best Regards,
>  Ahmad
>
>
>  -----Original Message-----
>  From: i-d-announce-bounces@ietf.org
>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
>  Internet-Drafts@ietf.org
>  Sent: Tuesday, April 29, 2008 8:30 PM
>  To: i-d-announce@ietf.org
>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
>
>  A New Internet-Draft is available from the on-line Internet-Drafts
>  directories.
>
>         Title           : Binding Revocation for IPv6 Mobility
>         Author(s)       : A. Muhanna, et al.
>         Filename        : draft-muhanna-mext-binding-revocation-00.txt
>         Pages           : 32
>         Date            : 2008-04-29
>
>  This document defines the revocation semantics for terminating a mobile
>  node's mobility session and associated resources.  These semantics are
>  generic enough and can be used by mobility entities in the case of
>  Client Mobile IPv6 and its extensions.  This mechanism allows the
>  mobility entity which initiates the revocation procedure to request its
>  corresponding one to terminate either one, multiple or all specified
>  binding cache entries.
>
>  A URL for this Internet-Draft is:
>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revocatio
>  n-00.txt
>
>  Internet-Drafts are also available by anonymous FTP at:
>  ftp://ftp.ietf.org/internet-drafts/
>
>  Below is the data which will enable a MIME compliant mail reader
>  implementation to automatically retrieve the ASCII version of the
>  Internet-Draft.
>
> _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
>
_______________________________________________
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Date: Wed, 30 Apr 2008 11:44:02 -0700
From: "Vijay Devarapallli" <dvijay@gmail.com>
To: "Ahmad Muhanna" <amuhanna@nortel.com>
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Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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Hi Ahmad,

One comment on the security considerations section.

   The protocol described here uses the same security association
   between the MN and the HA or the MAG and the LMA that has been used
   to exchange the corresponding MIPv6 or Proxy MIPv6 BU and BA when the
   session was established.

The security association setup between the MN and the HA or between
the MAG and the LMA may not be usable for protecting the mobility
header message that carries the binding revocation. According to RFC
4877, if fine grain selectors are used, the following will be the SPD
entry on the MN.

       mobile node SPD-S:
         - IF local_address = home_address_1 &
              remote_address = home_agent_1 &
              proto = MH & local_mh_type = BU & remote_mh_type = BAck
           Then use SA ESP transport mode
           Initiate using IDi = user_1 to address home_agent_1

This can only protect the BU/BAck messages, not the new mobility
header message that carries the binding revocation messages.

So we might need some text in the security considerations section that
says you must negotiate selectors such that the new mobility header
message is also included along with the BU/BAck.

Or we can define new SPD entries in the binding revocation document
(or in the generic notification draft, if we re-use the generic
notification messages for binding revocation).

Vijay

On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna <amuhanna@nortel.com> wrote:
> Hello All,
>
>  Please find the latest Binding Revocation for IPv6 Mobility draft at the
>  below link.
>  We highly value your review and comments!
>
>  Many Thanks in advance!
>
>  Best Regards,
>  Ahmad
>
>
>  -----Original Message-----
>  From: i-d-announce-bounces@ietf.org
>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
>  Internet-Drafts@ietf.org
>  Sent: Tuesday, April 29, 2008 8:30 PM
>  To: i-d-announce@ietf.org
>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
>
>  A New Internet-Draft is available from the on-line Internet-Drafts
>  directories.
>
>         Title           : Binding Revocation for IPv6 Mobility
>         Author(s)       : A. Muhanna, et al.
>         Filename        : draft-muhanna-mext-binding-revocation-00.txt
>         Pages           : 32
>         Date            : 2008-04-29
>
>  This document defines the revocation semantics for terminating a mobile
>  node's mobility session and associated resources.  These semantics are
>  generic enough and can be used by mobility entities in the case of
>  Client Mobile IPv6 and its extensions.  This mechanism allows the
>  mobility entity which initiates the revocation procedure to request its
>  corresponding one to terminate either one, multiple or all specified
>  binding cache entries.
>
>  A URL for this Internet-Draft is:
>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revocatio
>  n-00.txt
>
>  Internet-Drafts are also available by anonymous FTP at:
>  ftp://ftp.ietf.org/internet-drafts/
>
>  Below is the data which will enable a MIME compliant mail reader
>  implementation to automatically retrieve the ASCII version of the
>  Internet-Draft.
>
> _______________________________________________
>  MEXT mailing list
>  MEXT@ietf.org
>  https://www.ietf.org/mailman/listinfo/mext
>
>
_______________________________________________
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MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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Hi Vijay,

I've been talking with Ahmad and Sri about this off-line and we're 
trying to come to an agreement over some of the text in gen-notification 
to more easily support the revocation draft.  Hopefully an update will 
be agreeable to everyone, but I wouldn't necessarily hold-up the current 
revocation draft for it.  That's my thoughts at least.

-Brian

Vijay Devarapallli wrote:
> Hi Ahmad and others,
> 
> We previously had a discussion on this draft on the MIP6 mailing list
> and it was agreed that the binding revocation message will be a
> sub-type in the Generic Notification Message.
> http://www.ietf.org/internet-drafts/draft-haley-mext-generic-notification-message-00.txt
> 
> We would need to modify the generic notification message to include a
> new 'subtype' field. We had discussed this in the past and made no
> progress. We can start with the following values
> 
> 0 - Reserved, not used
> 1 - Notification message indicated by Mobility Options
> 2 - Binding Revocation Indication
> 3 - Binding Revocation Acknowledgement
> 4-255 reserved
> 
> The Generic Notification message draft is quite simple and shouldn't
> take too long to standardize. It would be a good idea to use the
> Generic Notification message as much as
> possible when you have something to notify to either the mobile node
> or the home agent. Otherwise we might end up with a proliferation of
> notification messages using up a lot of mobility header message types.
> 
> Vijay
> 
> On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna <amuhanna@nortel.com> wrote:
>> Hello All,
>>
>>  Please find the latest Binding Revocation for IPv6 Mobility draft at the
>>  below link.
>>  We highly value your review and comments!
>>
>>  Many Thanks in advance!
>>
>>  Best Regards,
>>  Ahmad
>>
>>
>>  -----Original Message-----
>>  From: i-d-announce-bounces@ietf.org
>>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
>>  Internet-Drafts@ietf.org
>>  Sent: Tuesday, April 29, 2008 8:30 PM
>>  To: i-d-announce@ietf.org
>>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
>>
>>  A New Internet-Draft is available from the on-line Internet-Drafts
>>  directories.
>>
>>         Title           : Binding Revocation for IPv6 Mobility
>>         Author(s)       : A. Muhanna, et al.
>>         Filename        : draft-muhanna-mext-binding-revocation-00.txt
>>         Pages           : 32
>>         Date            : 2008-04-29
>>
>>  This document defines the revocation semantics for terminating a mobile
>>  node's mobility session and associated resources.  These semantics are
>>  generic enough and can be used by mobility entities in the case of
>>  Client Mobile IPv6 and its extensions.  This mechanism allows the
>>  mobility entity which initiates the revocation procedure to request its
>>  corresponding one to terminate either one, multiple or all specified
>>  binding cache entries.
>>
>>  A URL for this Internet-Draft is:
>>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revocatio
>>  n-00.txt
>>
>>  Internet-Drafts are also available by anonymous FTP at:
>>  ftp://ftp.ietf.org/internet-drafts/
>>
>>  Below is the data which will enable a MIME compliant mail reader
>>  implementation to automatically retrieve the ASCII version of the
>>  Internet-Draft.
>>
>> _______________________________________________
>>  MEXT mailing list
>>  MEXT@ietf.org
>>  https://www.ietf.org/mailman/listinfo/mext
>>
>>
> 
_______________________________________________
MEXT mailing list
MEXT@ietf.org
https://www.ietf.org/mailman/listinfo/mext


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	<f1f4dcdc0804301144l67c58999ra7214593bd5fabe5@mail.gmail.com>
From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Vijay Devarapallli" <dvijay@gmail.com>
Cc: mext <mext@ietf.org>
Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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Hi Vijay,

I agree. 
We will work offline on some clarification text which we can include in
the next revision.

Thanks!

Regards,
Ahmad
 

> -----Original Message-----
> From: Vijay Devarapallli [mailto:dvijay@gmail.com] 
> Sent: Wednesday, April 30, 2008 1:44 PM
> To: Muhanna, Ahmad (RICH1:2H10)
> Cc: mext
> Subject: Re: [MEXT] FW: I-D 
> Action:draft-muhanna-mext-binding-revocation-00.txt
> 
> Hi Ahmad,
> 
> One comment on the security considerations section.
> 
>    The protocol described here uses the same security association
>    between the MN and the HA or the MAG and the LMA that has been used
>    to exchange the corresponding MIPv6 or Proxy MIPv6 BU and 
> BA when the
>    session was established.
> 
> The security association setup between the MN and the HA or 
> between the MAG and the LMA may not be usable for protecting 
> the mobility header message that carries the binding 
> revocation. According to RFC 4877, if fine grain selectors 
> are used, the following will be the SPD entry on the MN.
> 
>        mobile node SPD-S:
>          - IF local_address = home_address_1 &
>               remote_address = home_agent_1 &
>               proto = MH & local_mh_type = BU & remote_mh_type = BAck
>            Then use SA ESP transport mode
>            Initiate using IDi = user_1 to address home_agent_1
> 
> This can only protect the BU/BAck messages, not the new 
> mobility header message that carries the binding revocation messages.
> 
> So we might need some text in the security considerations 
> section that says you must negotiate selectors such that the 
> new mobility header message is also included along with the BU/BAck.
> 
> Or we can define new SPD entries in the binding revocation 
> document (or in the generic notification draft, if we re-use 
> the generic notification messages for binding revocation).
> 
> Vijay
> 
> On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna 
> <amuhanna@nortel.com> wrote:
> > Hello All,
> >
> >  Please find the latest Binding Revocation for IPv6 
> Mobility draft at 
> > the  below link.
> >  We highly value your review and comments!
> >
> >  Many Thanks in advance!
> >
> >  Best Regards,
> >  Ahmad
> >
> >
> >  -----Original Message-----
> >  From: i-d-announce-bounces@ietf.org
> >  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of  
> > Internet-Drafts@ietf.org
> >  Sent: Tuesday, April 29, 2008 8:30 PM
> >  To: i-d-announce@ietf.org
> >  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
> >
> >  A New Internet-Draft is available from the on-line 
> Internet-Drafts  
> > directories.
> >
> >         Title           : Binding Revocation for IPv6 Mobility
> >         Author(s)       : A. Muhanna, et al.
> >         Filename        : 
> draft-muhanna-mext-binding-revocation-00.txt
> >         Pages           : 32
> >         Date            : 2008-04-29
> >
> >  This document defines the revocation semantics for terminating a 
> > mobile  node's mobility session and associated resources.  These 
> > semantics are  generic enough and can be used by mobility 
> entities in 
> > the case of  Client Mobile IPv6 and its extensions.  This mechanism 
> > allows the  mobility entity which initiates the revocation 
> procedure 
> > to request its  corresponding one to terminate either one, 
> multiple or 
> > all specified  binding cache entries.
> >
> >  A URL for this Internet-Draft is:
> >  
> > 
> http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revocat
> > io
> >  n-00.txt
> >
> >  Internet-Drafts are also available by anonymous FTP at:
> >  ftp://ftp.ietf.org/internet-drafts/
> >
> >  Below is the data which will enable a MIME compliant mail reader  
> > implementation to automatically retrieve the ASCII version of the  
> > Internet-Draft.
> >
> > _______________________________________________
> >  MEXT mailing list
> >  MEXT@ietf.org
> >  https://www.ietf.org/mailman/listinfo/mext
> >
> >
> 
_______________________________________________
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From: Sri Gundavelli <sgundave@cisco.com>
To: Vijay Devarapallli <dvijay@gmail.com>
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Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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We need to specify the selectors for the MH type used for
Generic Notification Msg type. All sub-type extensions
that are using the Generic Notification Message will be
within this scope and are not required to deal with the
security semantics.

Sri



On Wed, 30 Apr 2008, Vijay Devarapallli wrote:

> Hi Ahmad,
>
> One comment on the security considerations section.
>
>   The protocol described here uses the same security association
>   between the MN and the HA or the MAG and the LMA that has been used
>   to exchange the corresponding MIPv6 or Proxy MIPv6 BU and BA when the
>   session was established.
>
> The security association setup between the MN and the HA or between
> the MAG and the LMA may not be usable for protecting the mobility
> header message that carries the binding revocation. According to RFC
> 4877, if fine grain selectors are used, the following will be the SPD
> entry on the MN.
>
>       mobile node SPD-S:
>         - IF local_address = home_address_1 &
>              remote_address = home_agent_1 &
>              proto = MH & local_mh_type = BU & remote_mh_type = BAck
>           Then use SA ESP transport mode
>           Initiate using IDi = user_1 to address home_agent_1
>
> This can only protect the BU/BAck messages, not the new mobility
> header message that carries the binding revocation messages.
>
> So we might need some text in the security considerations section that
> says you must negotiate selectors such that the new mobility header
> message is also included along with the BU/BAck.
>
> Or we can define new SPD entries in the binding revocation document
> (or in the generic notification draft, if we re-use the generic
> notification messages for binding revocation).
>
> Vijay
>
> On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna <amuhanna@nortel.com> wrote:
>> Hello All,
>>
>>  Please find the latest Binding Revocation for IPv6 Mobility draft at the
>>  below link.
>>  We highly value your review and comments!
>>
>>  Many Thanks in advance!
>>
>>  Best Regards,
>>  Ahmad
>>
>>
>>  -----Original Message-----
>>  From: i-d-announce-bounces@ietf.org
>>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
>>  Internet-Drafts@ietf.org
>>  Sent: Tuesday, April 29, 2008 8:30 PM
>>  To: i-d-announce@ietf.org
>>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
>>
>>  A New Internet-Draft is available from the on-line Internet-Drafts
>>  directories.
>>
>>         Title           : Binding Revocation for IPv6 Mobility
>>         Author(s)       : A. Muhanna, et al.
>>         Filename        : draft-muhanna-mext-binding-revocation-00.txt
>>         Pages           : 32
>>         Date            : 2008-04-29
>>
>>  This document defines the revocation semantics for terminating a mobile
>>  node's mobility session and associated resources.  These semantics are
>>  generic enough and can be used by mobility entities in the case of
>>  Client Mobile IPv6 and its extensions.  This mechanism allows the
>>  mobility entity which initiates the revocation procedure to request its
>>  corresponding one to terminate either one, multiple or all specified
>>  binding cache entries.
>>
>>  A URL for this Internet-Draft is:
>>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revocatio
>>  n-00.txt
>>
>>  Internet-Drafts are also available by anonymous FTP at:
>>  ftp://ftp.ietf.org/internet-drafts/
>>
>>  Below is the data which will enable a MIME compliant mail reader
>>  implementation to automatically retrieve the ASCII version of the
>>  Internet-Draft.
>>
>> _______________________________________________
>>  MEXT mailing list
>>  MEXT@ietf.org
>>  https://www.ietf.org/mailman/listinfo/mext
>>
>>
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
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From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Vijay Devarapallli" <dvijay@gmail.com>
Cc: mext <mext@ietf.org>
Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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Hi Vijay,

Yes, we had a lot of discussion on this topic before and it seems that
different people have different understanding of what we have agreed
upon.

The main comment that people used at that time is NOT to use two new MH
types for revocation which is a scare resource.  Other opinions said
that revocation is a kind of notification. At that time and according to
what have been presented in Prague, Notification message was supposed to
communicate an opaque string where revocation is not as simple as an
opaque string of characters.

In my understanding the agreement was to create a new subtype header
that will be used as a container for different messages which may have
specific processing and functionality.

For example: 

1. when that subtype is set to 1 "using your example below", then it
define that the message to follow is "Generic Notification Message" and
the processing of that message will be defined in the Generic
Notification Message draft. I guess the Generic notification draft
currently define two more subtypes which you did not list. (Generic
Notification Response) and (Generic Notification Request)

2. In my understanding, when the subtype is set to 2/3 "using your
example", the message contained is BRI/BRA and should follow the
processing as per the Binding Revocation for IPv6 Mobility draft.

Having said all of the above, I am not sure what is missing. If we want
to go this route, then we need to define a "Generic Subtype Header" (or
call it whatever) in your example referred as subtype field and use it
as a container. The subtype value should define a specific message where
the processing is defined in a specific draft.

That is at my understanding of the agreement.


Regards,
Ahmad
 

> -----Original Message-----
> From: Vijay Devarapallli [mailto:dvijay@gmail.com] 
> Sent: Wednesday, April 30, 2008 1:05 PM
> To: Muhanna, Ahmad (RICH1:2H10)
> Cc: mext; Basavaraj Patil; Brian Haley; Sri Gundavelli
> Subject: Re: [MEXT] FW: I-D 
> Action:draft-muhanna-mext-binding-revocation-00.txt
> 
> Hi Ahmad and others,
> 
> We previously had a discussion on this draft on the MIP6 
> mailing list and it was agreed that the binding revocation 
> message will be a sub-type in the Generic Notification Message.
> http://www.ietf.org/internet-drafts/draft-haley-mext-generic-n
otification-message-00.txt
> 
> We would need to modify the generic notification message to 
> include a new 'subtype' field. We had discussed this in the 
> past and made no progress. We can start with the following values
> 
> 0 - Reserved, not used
> 1 - Notification message indicated by Mobility Options
> 2 - Binding Revocation Indication
> 3 - Binding Revocation Acknowledgement
> 4-255 reserved
> 
> The Generic Notification message draft is quite simple and 
> shouldn't take too long to standardize. It would be a good 
> idea to use the Generic Notification message as much as 
> possible when you have something to notify to either the 
> mobile node or the home agent. Otherwise we might end up with 
> a proliferation of notification messages using up a lot of 
> mobility header message types.
> 
> Vijay
> 
> On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna 
> <amuhanna@nortel.com> wrote:
> > Hello All,
> >
> >  Please find the latest Binding Revocation for IPv6 
> Mobility draft at 
> > the  below link.
> >  We highly value your review and comments!
> >
> >  Many Thanks in advance!
> >
> >  Best Regards,
> >  Ahmad
> >
> >
> >  -----Original Message-----
> >  From: i-d-announce-bounces@ietf.org
> >  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of  
> > Internet-Drafts@ietf.org
> >  Sent: Tuesday, April 29, 2008 8:30 PM
> >  To: i-d-announce@ietf.org
> >  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
> >
> >  A New Internet-Draft is available from the on-line 
> Internet-Drafts  
> > directories.
> >
> >         Title           : Binding Revocation for IPv6 Mobility
> >         Author(s)       : A. Muhanna, et al.
> >         Filename        : 
> draft-muhanna-mext-binding-revocation-00.txt
> >         Pages           : 32
> >         Date            : 2008-04-29
> >
> >  This document defines the revocation semantics for terminating a 
> > mobile  node's mobility session and associated resources.  These 
> > semantics are  generic enough and can be used by mobility 
> entities in 
> > the case of  Client Mobile IPv6 and its extensions.  This mechanism 
> > allows the  mobility entity which initiates the revocation 
> procedure 
> > to request its  corresponding one to terminate either one, 
> multiple or 
> > all specified  binding cache entries.
> >
> >  A URL for this Internet-Draft is:
> >  
> > 
> http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revocat
> > io
> >  n-00.txt
> >
> >  Internet-Drafts are also available by anonymous FTP at:
> >  ftp://ftp.ietf.org/internet-drafts/
> >
> >  Below is the data which will enable a MIME compliant mail reader  
> > implementation to automatically retrieve the ASCII version of the  
> > Internet-Draft.
> >
> > _______________________________________________
> >  MEXT mailing list
> >  MEXT@ietf.org
> >  https://www.ietf.org/mailman/listinfo/mext
> >
> >
> 
_______________________________________________
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From: "Giaretta, Gerardo" <gerardog@qualcomm.com>
To: "Sri Gundavelli" <sgundave@cisco.com>,
	"Vijay Devarapallli" <dvijay@gmail.com>
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Cc: mext <mext@ietf.org>
Subject: Re: [MEXT] FW:
	I-DAction:draft-muhanna-mext-binding-revocation-00.txt
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I agree this would be a good approach.

BTW, you are suggesting defining the selectors as additional selectors
for the IPsec SA used for BU/BA, correct? I guess it would not be
acceptable to create a new child SA just for binding revocation
messages.

Cheers
Gerardo

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf
Of
> Sri Gundavelli
> Sent: Wednesday, April 30, 2008 1:23 PM
> To: Vijay Devarapallli
> Cc: mext
> Subject: Re: [MEXT] FW:
I-DAction:draft-muhanna-mext-binding-revocation-
> 00.txt
> 
> We need to specify the selectors for the MH type used for
> Generic Notification Msg type. All sub-type extensions
> that are using the Generic Notification Message will be
> within this scope and are not required to deal with the
> security semantics.
> 
> Sri
> 
> 
> 
> On Wed, 30 Apr 2008, Vijay Devarapallli wrote:
> 
> > Hi Ahmad,
> >
> > One comment on the security considerations section.
> >
> >   The protocol described here uses the same security association
> >   between the MN and the HA or the MAG and the LMA that has been
used
> >   to exchange the corresponding MIPv6 or Proxy MIPv6 BU and BA when
the
> >   session was established.
> >
> > The security association setup between the MN and the HA or between
> > the MAG and the LMA may not be usable for protecting the mobility
> > header message that carries the binding revocation. According to RFC
> > 4877, if fine grain selectors are used, the following will be the
SPD
> > entry on the MN.
> >
> >       mobile node SPD-S:
> >         - IF local_address = home_address_1 &
> >              remote_address = home_agent_1 &
> >              proto = MH & local_mh_type = BU & remote_mh_type = BAck
> >           Then use SA ESP transport mode
> >           Initiate using IDi = user_1 to address home_agent_1
> >
> > This can only protect the BU/BAck messages, not the new mobility
> > header message that carries the binding revocation messages.
> >
> > So we might need some text in the security considerations section
that
> > says you must negotiate selectors such that the new mobility header
> > message is also included along with the BU/BAck.
> >
> > Or we can define new SPD entries in the binding revocation document
> > (or in the generic notification draft, if we re-use the generic
> > notification messages for binding revocation).
> >
> > Vijay
> >
> > On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna <amuhanna@nortel.com>
> wrote:
> >> Hello All,
> >>
> >>  Please find the latest Binding Revocation for IPv6 Mobility draft
at
> the
> >>  below link.
> >>  We highly value your review and comments!
> >>
> >>  Many Thanks in advance!
> >>
> >>  Best Regards,
> >>  Ahmad
> >>
> >>
> >>  -----Original Message-----
> >>  From: i-d-announce-bounces@ietf.org
> >>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> >>  Internet-Drafts@ietf.org
> >>  Sent: Tuesday, April 29, 2008 8:30 PM
> >>  To: i-d-announce@ietf.org
> >>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
> >>
> >>  A New Internet-Draft is available from the on-line Internet-Drafts
> >>  directories.
> >>
> >>         Title           : Binding Revocation for IPv6 Mobility
> >>         Author(s)       : A. Muhanna, et al.
> >>         Filename        :
draft-muhanna-mext-binding-revocation-00.txt
> >>         Pages           : 32
> >>         Date            : 2008-04-29
> >>
> >>  This document defines the revocation semantics for terminating a
> mobile
> >>  node's mobility session and associated resources.  These semantics
are
> >>  generic enough and can be used by mobility entities in the case of
> >>  Client Mobile IPv6 and its extensions.  This mechanism allows the
> >>  mobility entity which initiates the revocation procedure to
request
> its
> >>  corresponding one to terminate either one, multiple or all
specified
> >>  binding cache entries.
> >>
> >>  A URL for this Internet-Draft is:
> >>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-
> revocatio
> >>  n-00.txt
> >>
> >>  Internet-Drafts are also available by anonymous FTP at:
> >>  ftp://ftp.ietf.org/internet-drafts/
> >>
> >>  Below is the data which will enable a MIME compliant mail reader
> >>  implementation to automatically retrieve the ASCII version of the
> >>  Internet-Draft.
> >>
> >> _______________________________________________
> >>  MEXT mailing list
> >>  MEXT@ietf.org
> >>  https://www.ietf.org/mailman/listinfo/mext
> >>
> >>
> > _______________________________________________
> > MEXT mailing list
> > MEXT@ietf.org
> > https://www.ietf.org/mailman/listinfo/mext
> >
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
_______________________________________________
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From: Sri Gundavelli <sgundave@cisco.com>
To: "Giaretta, Gerardo" <gerardog@qualcomm.com>
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Subject: Re: [MEXT] FW:
	I-DAction:draft-muhanna-mext-binding-revocation-00.txt
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Hi Gerardo,


On Wed, 30 Apr 2008, Giaretta, Gerardo wrote:

> I agree this would be a good approach.
>
> BTW, you are suggesting defining the selectors as additional selectors
> for the IPsec SA used for BU/BA, correct? I guess it would not be
> acceptable to create a new child SA just for binding revocation
> messages.
>


The messaging, security semantics and the basic transport aspects
for generic notification events are provided by the Generic
Notification draft. Revocation is another notification message. The
reason why its in a new draft, as it requires more focus and need to
specify the receiver action. It should not have deal with security
semantics, IMO. It just needs to refer to the format from Notification
draft, if the WG concensus is to use that format.


Sri




> Cheers
> Gerardo
>
>> -----Original Message-----
>> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf
> Of
>> Sri Gundavelli
>> Sent: Wednesday, April 30, 2008 1:23 PM
>> To: Vijay Devarapallli
>> Cc: mext
>> Subject: Re: [MEXT] FW:
> I-DAction:draft-muhanna-mext-binding-revocation-
>> 00.txt
>>
>> We need to specify the selectors for the MH type used for
>> Generic Notification Msg type. All sub-type extensions
>> that are using the Generic Notification Message will be
>> within this scope and are not required to deal with the
>> security semantics.
>>
>> Sri
>>
>>
>>
>> On Wed, 30 Apr 2008, Vijay Devarapallli wrote:
>>
>>> Hi Ahmad,
>>>
>>> One comment on the security considerations section.
>>>
>>>   The protocol described here uses the same security association
>>>   between the MN and the HA or the MAG and the LMA that has been
> used
>>>   to exchange the corresponding MIPv6 or Proxy MIPv6 BU and BA when
> the
>>>   session was established.
>>>
>>> The security association setup between the MN and the HA or between
>>> the MAG and the LMA may not be usable for protecting the mobility
>>> header message that carries the binding revocation. According to RFC
>>> 4877, if fine grain selectors are used, the following will be the
> SPD
>>> entry on the MN.
>>>
>>>       mobile node SPD-S:
>>>         - IF local_address = home_address_1 &
>>>              remote_address = home_agent_1 &
>>>              proto = MH & local_mh_type = BU & remote_mh_type = BAck
>>>           Then use SA ESP transport mode
>>>           Initiate using IDi = user_1 to address home_agent_1
>>>
>>> This can only protect the BU/BAck messages, not the new mobility
>>> header message that carries the binding revocation messages.
>>>
>>> So we might need some text in the security considerations section
> that
>>> says you must negotiate selectors such that the new mobility header
>>> message is also included along with the BU/BAck.
>>>
>>> Or we can define new SPD entries in the binding revocation document
>>> (or in the generic notification draft, if we re-use the generic
>>> notification messages for binding revocation).
>>>
>>> Vijay
>>>
>>> On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna <amuhanna@nortel.com>
>> wrote:
>>>> Hello All,
>>>>
>>>>  Please find the latest Binding Revocation for IPv6 Mobility draft
> at
>> the
>>>>  below link.
>>>>  We highly value your review and comments!
>>>>
>>>>  Many Thanks in advance!
>>>>
>>>>  Best Regards,
>>>>  Ahmad
>>>>
>>>>
>>>>  -----Original Message-----
>>>>  From: i-d-announce-bounces@ietf.org
>>>>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
>>>>  Internet-Drafts@ietf.org
>>>>  Sent: Tuesday, April 29, 2008 8:30 PM
>>>>  To: i-d-announce@ietf.org
>>>>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
>>>>
>>>>  A New Internet-Draft is available from the on-line Internet-Drafts
>>>>  directories.
>>>>
>>>>         Title           : Binding Revocation for IPv6 Mobility
>>>>         Author(s)       : A. Muhanna, et al.
>>>>         Filename        :
> draft-muhanna-mext-binding-revocation-00.txt
>>>>         Pages           : 32
>>>>         Date            : 2008-04-29
>>>>
>>>>  This document defines the revocation semantics for terminating a
>> mobile
>>>>  node's mobility session and associated resources.  These semantics
> are
>>>>  generic enough and can be used by mobility entities in the case of
>>>>  Client Mobile IPv6 and its extensions.  This mechanism allows the
>>>>  mobility entity which initiates the revocation procedure to
> request
>> its
>>>>  corresponding one to terminate either one, multiple or all
> specified
>>>>  binding cache entries.
>>>>
>>>>  A URL for this Internet-Draft is:
>>>>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-
>> revocatio
>>>>  n-00.txt
>>>>
>>>>  Internet-Drafts are also available by anonymous FTP at:
>>>>  ftp://ftp.ietf.org/internet-drafts/
>>>>
>>>>  Below is the data which will enable a MIME compliant mail reader
>>>>  implementation to automatically retrieve the ASCII version of the
>>>>  Internet-Draft.
>>>>
>>>> _______________________________________________
>>>>  MEXT mailing list
>>>>  MEXT@ietf.org
>>>>  https://www.ietf.org/mailman/listinfo/mext
>>>>
>>>>
>>> _______________________________________________
>>> MEXT mailing list
>>> MEXT@ietf.org
>>> https://www.ietf.org/mailman/listinfo/mext
>>>
>> _______________________________________________
>> MEXT mailing list
>> MEXT@ietf.org
>> https://www.ietf.org/mailman/listinfo/mext
>
_______________________________________________
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Thread-Topic: [MEXT] FW:	I-DAction:draft-muhanna-mext-binding-revocation-00.txt
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From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Giaretta, Gerardo" <gerardog@qualcomm.com>,
	"Sri Gundavelli" <sgundave@cisco.com>,
	"Vijay Devarapallli" <dvijay@gmail.com>
Cc: mext <mext@ietf.org>
Subject: Re: [MEXT]
	FW:	I-DAction:draft-muhanna-mext-binding-revocation-00.txt
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Gerardo,

That is not a big deal. The confusion is when we want to refer to every
message contained under that type MH as generic Notification message and
at the same time define a mechanism for that generic notification
message, which is defined by a specific subtype. That does not make any
sense.

Of course, that was the compromise, to define a new subtype field in
order to avoid using new MH types. 

There is no sense what so ever in calling all messages with all
different subtypes "generic notification message" while the
understanding of the scope of the generic notification message is as "an
opaque string of characters"

I do not believe that we have a big problem here but we need to specify
the scope precisely to avoid confusion.


Regards,
Ahmad
 

> -----Original Message-----
> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On 
> Behalf Of Giaretta, Gerardo
> Sent: Wednesday, April 30, 2008 3:31 PM
> To: Sri Gundavelli; Vijay Devarapallli
> Cc: mext
> Subject: Re: [MEXT] FW: 
> I-DAction:draft-muhanna-mext-binding-revocation-00.txt
> 
> I agree this would be a good approach.
> 
> BTW, you are suggesting defining the selectors as additional 
> selectors for the IPsec SA used for BU/BA, correct? I guess 
> it would not be acceptable to create a new child SA just for 
> binding revocation messages.
> 
> Cheers
> Gerardo
> 
> > -----Original Message-----
> > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf
> Of
> > Sri Gundavelli
> > Sent: Wednesday, April 30, 2008 1:23 PM
> > To: Vijay Devarapallli
> > Cc: mext
> > Subject: Re: [MEXT] FW:
> I-DAction:draft-muhanna-mext-binding-revocation-
> > 00.txt
> > 
> > We need to specify the selectors for the MH type used for Generic 
> > Notification Msg type. All sub-type extensions that are using the 
> > Generic Notification Message will be within this scope and are not 
> > required to deal with the security semantics.
> > 
> > Sri
> > 
> > 
> > 
> > On Wed, 30 Apr 2008, Vijay Devarapallli wrote:
> > 
> > > Hi Ahmad,
> > >
> > > One comment on the security considerations section.
> > >
> > >   The protocol described here uses the same security association
> > >   between the MN and the HA or the MAG and the LMA that has been
> used
> > >   to exchange the corresponding MIPv6 or Proxy MIPv6 BU 
> and BA when
> the
> > >   session was established.
> > >
> > > The security association setup between the MN and the HA 
> or between 
> > > the MAG and the LMA may not be usable for protecting the mobility 
> > > header message that carries the binding revocation. 
> According to RFC 
> > > 4877, if fine grain selectors are used, the following will be the
> SPD
> > > entry on the MN.
> > >
> > >       mobile node SPD-S:
> > >         - IF local_address = home_address_1 &
> > >              remote_address = home_agent_1 &
> > >              proto = MH & local_mh_type = BU & 
> remote_mh_type = BAck
> > >           Then use SA ESP transport mode
> > >           Initiate using IDi = user_1 to address home_agent_1
> > >
> > > This can only protect the BU/BAck messages, not the new mobility 
> > > header message that carries the binding revocation messages.
> > >
> > > So we might need some text in the security considerations section
> that
> > > says you must negotiate selectors such that the new 
> mobility header 
> > > message is also included along with the BU/BAck.
> > >
> > > Or we can define new SPD entries in the binding 
> revocation document 
> > > (or in the generic notification draft, if we re-use the generic 
> > > notification messages for binding revocation).
> > >
> > > Vijay
> > >
> > > On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna 
> <amuhanna@nortel.com>
> > wrote:
> > >> Hello All,
> > >>
> > >>  Please find the latest Binding Revocation for IPv6 
> Mobility draft
> at
> > the
> > >>  below link.
> > >>  We highly value your review and comments!
> > >>
> > >>  Many Thanks in advance!
> > >>
> > >>  Best Regards,
> > >>  Ahmad
> > >>
> > >>
> > >>  -----Original Message-----
> > >>  From: i-d-announce-bounces@ietf.org  
> > >> [mailto:i-d-announce-bounces@ietf.org] On Behalf Of  
> > >> Internet-Drafts@ietf.org
> > >>  Sent: Tuesday, April 29, 2008 8:30 PM
> > >>  To: i-d-announce@ietf.org
> > >>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
> > >>
> > >>  A New Internet-Draft is available from the on-line 
> Internet-Drafts  
> > >> directories.
> > >>
> > >>         Title           : Binding Revocation for IPv6 Mobility
> > >>         Author(s)       : A. Muhanna, et al.
> > >>         Filename        :
> draft-muhanna-mext-binding-revocation-00.txt
> > >>         Pages           : 32
> > >>         Date            : 2008-04-29
> > >>
> > >>  This document defines the revocation semantics for terminating a
> > mobile
> > >>  node's mobility session and associated resources.  
> These semantics
> are
> > >>  generic enough and can be used by mobility entities in 
> the case of  
> > >> Client Mobile IPv6 and its extensions.  This mechanism 
> allows the  
> > >> mobility entity which initiates the revocation procedure to
> request
> > its
> > >>  corresponding one to terminate either one, multiple or all
> specified
> > >>  binding cache entries.
> > >>
> > >>  A URL for this Internet-Draft is:
> > >>  http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-
> > revocatio
> > >>  n-00.txt
> > >>
> > >>  Internet-Drafts are also available by anonymous FTP at:
> > >>  ftp://ftp.ietf.org/internet-drafts/
> > >>
> > >>  Below is the data which will enable a MIME compliant 
> mail reader  
> > >> implementation to automatically retrieve the ASCII 
> version of the  
> > >> Internet-Draft.
> > >>
> > >> _______________________________________________
> > >>  MEXT mailing list
> > >>  MEXT@ietf.org
> > >>  https://www.ietf.org/mailman/listinfo/mext
> > >>
> > >>
> > > _______________________________________________
> > > MEXT mailing list
> > > MEXT@ietf.org
> > > https://www.ietf.org/mailman/listinfo/mext
> > >
> > _______________________________________________
> > MEXT mailing list
> > MEXT@ietf.org
> > https://www.ietf.org/mailman/listinfo/mext
> _______________________________________________
> MEXT mailing list
> MEXT@ietf.org
> https://www.ietf.org/mailman/listinfo/mext
> 
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From mext-bounces@ietf.org  Wed Apr 30 17:30:46 2008
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From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Brian Haley" <brian.haley@hp.com>, "Vijay Devarapallli" <dvijay@gmail.com>
Cc: mext <mext@ietf.org>
Subject: Re: [MEXT] FW: I-D
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> 
> Hi Vijay,
> 
> I've been talking with Ahmad and Sri about this off-line and 
> we're trying to come to an agreement over some of the text in 
> gen-notification to more easily support the revocation draft. 
>  Hopefully an update will be agreeable to everyone, but I 
> wouldn't necessarily hold-up the current revocation draft for 
> it.  That's my thoughts at least.

[Ahmad]
Hi Brian,

I appreciate your opinion here. I believe it is inline with the original
scope of Generic Notification Message which as I said earlier, was
clearly presented in Prague IETF meeting as the following:
"communicating an opaque string of information". Actually, when I read
the latest Generic Notification draft I found several places in the
draft which emphasize the original nature and scope of this draft. Here
is some examples:

1. RFC 3775 [RFC3775] contains no provision for Mobile IPv6 entities,
   such as a home agent or mobile node, to send and receive asynchronous
   notification messages during a mobility session.

2. This document describes a generic notification message protocol that
   can be used by Mobile IPv6 entities for sending and receiving simple
   notification events. [Ahmad: I do not think revocation as described
in Binding Revocation for IPv6 Mobility fits under this scope]

3. The Generic Notification message is used by the home agent to notify
   the mobile node, or vice-versa, that there is an event that requires
   attention. [Ahmad: clearly in conflict with the Binding Revocation]

I respect your opinion and it seems to me that you probably wrote the
draft with that in mind. I agree, It makes sense to keep the revocation
separate from the Generic Notification Message. This way there is no
dependency on the Generic Notification message and there is no worry on
making sure that nothing in one draft restrict or limit the other draft
functionality. Finally, both can advance independently.

In my mind, if a simple functionality as the HA switch message qualify
to have a separate MH type why not Binding Revocation?

Regards,
Ahmad

> 
> -Brian
> 
> Vijay Devarapallli wrote:
> > Hi Ahmad and others,
> > 
> > We previously had a discussion on this draft on the MIP6 
> mailing list 
> > and it was agreed that the binding revocation message will be a 
> > sub-type in the Generic Notification Message.
> > 
> http://www.ietf.org/internet-drafts/draft-haley-mext-generic-notificat
> > ion-message-00.txt
> > 
> > We would need to modify the generic notification message to 
> include a 
> > new 'subtype' field. We had discussed this in the past and made no 
> > progress. We can start with the following values
> > 
> > 0 - Reserved, not used
> > 1 - Notification message indicated by Mobility Options
> > 2 - Binding Revocation Indication
> > 3 - Binding Revocation Acknowledgement
> > 4-255 reserved
> > 
> > The Generic Notification message draft is quite simple and 
> shouldn't 
> > take too long to standardize. It would be a good idea to use the 
> > Generic Notification message as much as possible when you have 
> > something to notify to either the mobile node or the home agent. 
> > Otherwise we might end up with a proliferation of notification 
> > messages using up a lot of mobility header message types.
> > 
> > Vijay
> > 
> > On Tue, Apr 29, 2008 at 6:32 PM, Ahmad Muhanna 
> <amuhanna@nortel.com> wrote:
> >> Hello All,
> >>
> >>  Please find the latest Binding Revocation for IPv6 
> Mobility draft at 
> >> the  below link.
> >>  We highly value your review and comments!
> >>
> >>  Many Thanks in advance!
> >>
> >>  Best Regards,
> >>  Ahmad
> >>
> >>
> >>  -----Original Message-----
> >>  From: i-d-announce-bounces@ietf.org
> >>  [mailto:i-d-announce-bounces@ietf.org] On Behalf Of  
> >> Internet-Drafts@ietf.org
> >>  Sent: Tuesday, April 29, 2008 8:30 PM
> >>  To: i-d-announce@ietf.org
> >>  Subject: I-D Action:draft-muhanna-mext-binding-revocation-00.txt
> >>
> >>  A New Internet-Draft is available from the on-line 
> Internet-Drafts  
> >> directories.
> >>
> >>         Title           : Binding Revocation for IPv6 Mobility
> >>         Author(s)       : A. Muhanna, et al.
> >>         Filename        : 
> draft-muhanna-mext-binding-revocation-00.txt
> >>         Pages           : 32
> >>         Date            : 2008-04-29
> >>
> >>  This document defines the revocation semantics for terminating a 
> >> mobile  node's mobility session and associated resources.  These 
> >> semantics are  generic enough and can be used by mobility 
> entities in 
> >> the case of  Client Mobile IPv6 and its extensions.  This 
> mechanism 
> >> allows the  mobility entity which initiates the revocation 
> procedure 
> >> to request its  corresponding one to terminate either one, 
> multiple 
> >> or all specified  binding cache entries.
> >>
> >>  A URL for this Internet-Draft is:
> >>  
> >> 
> http://www.ietf.org/internet-drafts/draft-muhanna-mext-binding-revoca
> >> tio
> >>  n-00.txt
> >>
> >>  Internet-Drafts are also available by anonymous FTP at:
> >>  ftp://ftp.ietf.org/internet-drafts/
> >>
> >>  Below is the data which will enable a MIME compliant mail reader  
> >> implementation to automatically retrieve the ASCII version of the  
> >> Internet-Draft.
> >>
> >> _______________________________________________
> >>  MEXT mailing list
> >>  MEXT@ietf.org
> >>  https://www.ietf.org/mailman/listinfo/mext
> >>
> >>
> > 
> 
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Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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Hi Ahmad,

Having not been involved on all these discussions offline, its not
clear to me why this should be so complicated.

Generic notifications messages are just notification messages. Some
can be simple event indicators, some can be events like revoking a
binding. I am sure the text in the Generic Notification message draft
can be fixed to say "simple" or "complicated" events. :)

On Wed, Apr 30, 2008 at 5:30 PM, Ahmad Muhanna <amuhanna@nortel.com> wrote:

>  In my mind, if a simple functionality as the HA switch message qualify
>  to have a separate MH type why not Binding Revocation?

Well, the Generic Notification Message draft was written much later.
IMO, it would have made sense to use the Generic Notification Message
for the HA switch message too, if it was available back then.

Vijay
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	Action:draft-muhanna-mext-binding-revocation-00.txt
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From: "Ahmad Muhanna" <amuhanna@nortel.com>
To: "Vijay Devarapallli" <dvijay@gmail.com>
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Subject: Re: [MEXT] FW: I-D
	Action:draft-muhanna-mext-binding-revocation-00.txt
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> -----Original Message-----
> From: Vijay Devarapallli [mailto:dvijay@gmail.com] 
> Sent: Wednesday, April 30, 2008 7:40 PM
> To: Muhanna, Ahmad (RICH1:2H10)
> Cc: Brian Haley; mext; Basavaraj Patil; Sri Gundavelli
> Subject: Re: [MEXT] FW: I-D 
> Action:draft-muhanna-mext-binding-revocation-00.txt
> 
> Hi Ahmad,
> 
> Having not been involved on all these discussions offline, its not
> clear to me why this should be so complicated.
> 
> Generic notifications messages are just notification messages. Some
> can be simple event indicators, some can be events like revoking a
> binding. I am sure the text in the Generic Notification message draft
> can be fixed to say "simple" or "complicated" events. :)

[Ahmad]
Very good.
1. Some of them simple events and some complicated vents.
2. Some Asynchronous and synchronous.
3. Some can be sent HA==>> MN ONLY and some can be sent MN<<==>>HA.
4. some have mobility options only, some have specific fields only, some
have specific fields and mobility options,
5. Some is send and forget about it and some MUST be acknowledged with
retransmission.

What is Generic in all of this? 
How can we make sure that it is very generic and that there is no
conflict?

It is absolutely a noble cause to protect the MH type filed. I agree
with that. That is probably the only thing generic in all of what we
have here. Defining a Generic Mobility Subtype field/header that can be
used to define a Generic Notification message and associated mechanism,
a Binding Revocation messages and their mechanism, etc is a good thing.
However, we need to carefully lay down a very strong foundation for a
common work that can be referenced and easily expanded without
complication. Also, processing a Mobility Header with a Generic Mobility
subtype field/header is nothing but a MH processing which can be
captured in a half page. 

If we follow that, then the scope can be very specific and Revocation
for example can reference the Generic Mobility Subtype field/header
definition and processing in anywhere without fear of conflict or
contradiction. On the other hand, the Generic Notification draft can
continue to define a generic notification subtype which can be used to
send, for example, a simple event, asynchronous messages, HA<<==>>MN,
with or without mobility options, etc.

I believe this is the way to have a common solution in order to reduce
any possible conflict. I understand that some people fear that if that
kind of proposal adopted some work item merely become an IANA number
assignment. But, IMO, that is absolutely not true.



> 
> On Wed, Apr 30, 2008 at 5:30 PM, Ahmad Muhanna 
> <amuhanna@nortel.com> wrote:
> 
> >  In my mind, if a simple functionality as the HA switch 
> message qualify
> >  to have a separate MH type why not Binding Revocation?
> 
> Well, the Generic Notification Message draft was written much later.
> IMO, it would have made sense to use the Generic Notification Message
> for the HA switch message too, if it was available back then.
> 
> Vijay
> 
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On Wed, 30 Apr 2008, Ahmad Muhanna wrote:

>
> I believe this is the way to have a common solution in order to reduce
> any possible conflict. I understand that some people fear that if that
> kind of proposal adopted some work item merely become an IANA number
> assignment. But, IMO, that is absolutely not true.
>

If that some people includes me, I will just say this.

I care the least if revocation uses a new MH Type or
the sub-type from Generic Message. Forget about the
fear part. However, couple of comments:

- Revocation message is *just* another notification message.
   It does not require semantics beyond a simple request/reply
   message format. It is not a protocol by itself. The value
   of the spec is in the use-cases and receiver action specifications.

- If there is a Notification message that is defined with the
   generic event properties in mind, we dont want to replicate
   that for every event. Let that generic behavior be specified
   in one place, including the security semantics. Keeping the
   messages to few MH types, will allow to define one set of
   selectors and even allow firewall admins to properly apply the
   required filters.

- At the end of the day, revocation message needs a message format.
   It does not diminish or increase the revocation draft value, if
   it uses its own MH type or a sub-type from Notification message.

Bottom line, Bryan or myself, care the least, if this uses a sub-type
from Notification draft or not. Do want you think is right, if the
WG and the chairs have no issue. I will leave this thread with this
note.

Thanks
Sri







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