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From: Arnel Lim <ALim@extremenetworks.com>
To: "trill@ietf.org" <trill@ietf.org>
Date: Wed, 1 Aug 2012 20:31:20 -0700
Thread-Topic: DRB Election Holding Time?
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Is there any holding time during the DRB election process where an RBridge =
must wait before becoming the DRB?

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From d3e3e3@gmail.com  Wed Aug  1 22:38:58 2012
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Thu, 2 Aug 2012 01:38:36 -0400
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Subject: Re: [trill] DRB Election Holding Time?
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There is an inhibition time before it will perform Appointed Forwarder
ingress and egress functions (see RFC 6439) but no delay for other DRB
functions.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com


On Wed, Aug 1, 2012 at 11:31 PM, Arnel Lim <ALim@extremenetworks.com> wrote:
> Is there any holding time during the DRB election process where an RBridge
> must wait before becoming the DRB?

From ginsberg@cisco.com  Thu Aug  2 15:43:10 2012
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Donald Eastlake <d3e3e3@gmail.com>, Arnel Lim <ALim@extremenetworks.com>
Thread-Topic: [trill] DRB Election Holding Time?
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Subject: Re: [trill] DRB Election Holding Time?
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ISO 10589 Section 8.4.1d states:

d)	After waiting iSISHelloTimer =D7 2 seconds, run the Level 1 and or the l=
evel 2 designated intermediate system election process depending on the Int=
ermediate system type.

This is an initial delay designed to allow acquisition of all the neighbors=
 on the LAN before running the first election. Running the initial election=
 upon acquisition of the first new neighbor would obviously result in incon=
sistent results until all neighbors were acquired.

RFC 6325 does not speak to this point explicitly (or at least I did not fin=
d any language) but I would assume a prudent implementation of DRB election=
 would follow this same rule.

   Les

> -----Original Message-----
> From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of
> Donald Eastlake
> Sent: Wednesday, August 01, 2012 10:39 PM
> To: Arnel Lim
> Cc: trill@ietf.org
> Subject: Re: [trill] DRB Election Holding Time?
>=20
> There is an inhibition time before it will perform Appointed Forwarder
> ingress and egress functions (see RFC 6439) but no delay for other DRB
> functions.
>=20
> Thanks,
> Donald
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  155 Beaver Street, Milford, MA 01757 USA
>  d3e3e3@gmail.com
>=20
>=20
> On Wed, Aug 1, 2012 at 11:31 PM, Arnel Lim <ALim@extremenetworks.com> wro=
te:
> > Is there any holding time during the DRB election process where an RBri=
dge
> > must wait before becoming the DRB?
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill

From d3e3e3@gmail.com  Thu Aug  9 12:34:05 2012
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Thu, 9 Aug 2012 15:33:43 -0400
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To: trill@ietf.org
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Subject: [trill] Open Source port to Linux
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Hi,

The following was presented at the TRILL WG meeting last week on the
port of the Solaris open source implementation of TRILL to Linux:
http://www.ietf.org/proceedings/84/slides/slides-84-trill-2.pptx

Anyone who would like to volunteer to help with that effort should
contact them through the email addresses given in the presentation.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

From somnath.chatterjee01@gmail.com  Fri Aug 10 05:07:08 2012
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From: somnath chatterjee <somnath.chatterjee01@gmail.com>
To: trill@ietf.org
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Subject: [trill]  Queries on ESADI LSP process
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Hi Authors,

Please consider this scenario when an ESADI RB1 has already 3
fragments of ESADI LSP from
ESADI RB2. And now it receives from RB2 an updated ESADI LSP-zero with
few changes(few MACs added
and few deleted) in MAC reachability TLV. How much time should the RB1
wait for other fragments
ESADI-LSP-1 ESADI_LSP-2 etc to come?
Also when all the fragmented ESADI LSPs have come, the comparison
between MAC  information in previously
received LSPs and new received LSPs will be easy if the MACs that are
lost are notified in some
way.Based on this comparisons the routes will be updated in hardware
(Egress Nickname, vlan, MAC1,MAC2).

Is it possible to set any field to mark the last ESADI LSP fragment
send? This will help the receiving RB
to know when to start comparing the LSPs for noticing any change in
MAC association. Also is it possible to send
the MACs that were lost(marking them by some flag), the comparison
algorithm will be quicker if that is done.

Thank you,
Regards,
Somnath

From ayabaner@gmail.com  Fri Aug 10 08:15:18 2012
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Subject: Re: [trill] Queries on ESADI LSP process
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Somnath,

This is no different than processing "routing" information for L3.

Also, you should probably take a look at this:
http://www.ietf.org/mail-archive/web/isis-wg/current/msg03006.html

Thanks,
Ayan


On Fri, Aug 10, 2012 at 5:07 AM, somnath chatterjee <
somnath.chatterjee01@gmail.com> wrote:

> Hi Authors,
>
> Please consider this scenario when an ESADI RB1 has already 3
> fragments of ESADI LSP from
> ESADI RB2. And now it receives from RB2 an updated ESADI LSP-zero with
> few changes(few MACs added
> and few deleted) in MAC reachability TLV. How much time should the RB1
> wait for other fragments
> ESADI-LSP-1 ESADI_LSP-2 etc to come?
> Also when all the fragmented ESADI LSPs have come, the comparison
> between MAC  information in previously
> received LSPs and new received LSPs will be easy if the MACs that are
> lost are notified in some
> way.Based on this comparisons the routes will be updated in hardware
> (Egress Nickname, vlan, MAC1,MAC2).
>
> Is it possible to set any field to mark the last ESADI LSP fragment
> send? This will help the receiving RB
> to know when to start comparing the LSPs for noticing any change in
> MAC association. Also is it possible to send
> the MACs that were lost(marking them by some flag), the comparison
> algorithm will be quicker if that is done.
>
> Thank you,
> Regards,
> Somnath
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
>

--f46d044304eec0fab004c6eacfff
Content-Type: text/html; charset=ISO-8859-1
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Somnath,<div><br></div><div>This is no different than processing &quot;rout=
ing&quot; information for L3.=A0</div><div><br></div><div>Also, you should =
probably take a look at this:=A0</div><div><a href=3D"http://www.ietf.org/m=
ail-archive/web/isis-wg/current/msg03006.html">http://www.ietf.org/mail-arc=
hive/web/isis-wg/current/msg03006.html</a></div>
<div><br></div><div>Thanks,</div><div>Ayan</div><div><br><br><div class=3D"=
gmail_quote">On Fri, Aug 10, 2012 at 5:07 AM, somnath chatterjee <span dir=
=3D"ltr">&lt;<a href=3D"mailto:somnath.chatterjee01@gmail.com" target=3D"_b=
lank">somnath.chatterjee01@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi Authors,<br>
<br>
Please consider this scenario when an ESADI RB1 has already 3<br>
fragments of ESADI LSP from<br>
ESADI RB2. And now it receives from RB2 an updated ESADI LSP-zero with<br>
few changes(few MACs added<br>
and few deleted) in MAC reachability TLV. How much time should the RB1<br>
wait for other fragments<br>
ESADI-LSP-1 ESADI_LSP-2 etc to come?<br>
Also when all the fragmented ESADI LSPs have come, the comparison<br>
between MAC =A0information in previously<br>
received LSPs and new received LSPs will be easy if the MACs that are<br>
lost are notified in some<br>
way.Based on this comparisons the routes will be updated in hardware<br>
(Egress Nickname, vlan, MAC1,MAC2).<br>
<br>
Is it possible to set any field to mark the last ESADI LSP fragment<br>
send? This will help the receiving RB<br>
to know when to start comparing the LSPs for noticing any change in<br>
MAC association. Also is it possible to send<br>
the MACs that were lost(marking them by some flag), the comparison<br>
algorithm will be quicker if that is done.<br>
<br>
Thank you,<br>
Regards,<br>
Somnath<br>
_______________________________________________<br>
trill mailing list<br>
<a href=3D"mailto:trill@ietf.org">trill@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/trill" target=3D"_blank">h=
ttps://www.ietf.org/mailman/listinfo/trill</a><br>
</blockquote></div><br></div>

--f46d044304eec0fab004c6eacfff--

From iesg-secretary@ietf.org  Fri Aug 10 10:07:36 2012
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Subject: [trill] Protocol Action: 'TRILL: Clarifications, Corrections, and Updates' to Proposed Standard	(draft-ietf-trill-clear-correct-06.txt)
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The IESG has approved the following document:
- 'TRILL: Clarifications, Corrections, and Updates'
  (draft-ietf-trill-clear-correct-06.txt) as Proposed Standard

This document is the product of the Transparent Interconnection of Lots
of Links Working Group.

The IESG contact persons are Ralph Droms and Brian Haberman.

A URL of this Internet Draft is:
http://datatracker.ietf.org/doc/draft-ietf-trill-clear-correct/




Technical Summary

The IETF TRILL (TRansparent Interconnection of Lots of Links)
protocol provides least cost pair-wise data forwarding without
configuration in multi-hop networks with arbitrary topology, safe
forwarding even during periods of temporary loops, and support for
multipathing of both unicast and multicast traffic. TRILL
accomplishes this by using IS-IS (Intermediate System to Intermediate
System) link state routing and by encapsulating traffic using a
header that includes a hop count. Since the TRILL base protocol was
approved in March 2010, active development of TRILL has revealed a
few errata in the original RFC 6325 and some cases that could use
clarifications or updates.

RFC 6327 and RFC 6439 provide clarifications and updates with respect
to Adjacency and Appointed Forwarders. This document provide other
known clarifications, corrections, and updates to RFC 6325, RFC 6327,
and RFC 6439.

The clarifications, corrections, and updates cover many areas, but
the most
substantial ones are in the areas of:
- Overloaded and/or Unreachable RBridges
- Distribution Trees
- Nickname selection
- Maximum Transmission Unit

Note that one change in this document (section 3.4) is not backward
compatible with [RFC6325] but has nevertheless been adopted to reduce
distribution tree changes resulting from topology changes.

Working Group Summary

There was consensus in the working group in favor of the document.

Document Quality

The document has been carefully reviewed in the WG and by the document
shepherd.
The document was forwarded to the IS-IS WG mailing list, which
resulted in some additional improvements.

Personnel

Who is the Document Shepherd?

Erik Nordmark

Who is the Responsible Area Director?

Ralph Droms




From somnath.chatterjee01@gmail.com  Wed Aug 15 08:55:46 2012
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Hi Ayan,

Thank you for the valuable information.

Regards,
Somnath

On Fri, Aug 10, 2012 at 8:45 PM, Ayan Banerjee <ayabaner@gmail.com> wrote:
> Somnath,
>
> This is no different than processing "routing" information for L3.
>
> Also, you should probably take a look at this:
> http://www.ietf.org/mail-archive/web/isis-wg/current/msg03006.html
>
> Thanks,
> Ayan
>
>
> On Fri, Aug 10, 2012 at 5:07 AM, somnath chatterjee
> <somnath.chatterjee01@gmail.com> wrote:
>>
>> Hi Authors,
>>
>> Please consider this scenario when an ESADI RB1 has already 3
>> fragments of ESADI LSP from
>> ESADI RB2. And now it receives from RB2 an updated ESADI LSP-zero with
>> few changes(few MACs added
>> and few deleted) in MAC reachability TLV. How much time should the RB1
>> wait for other fragments
>> ESADI-LSP-1 ESADI_LSP-2 etc to come?
>> Also when all the fragmented ESADI LSPs have come, the comparison
>> between MAC  information in previously
>> received LSPs and new received LSPs will be easy if the MACs that are
>> lost are notified in some
>> way.Based on this comparisons the routes will be updated in hardware
>> (Egress Nickname, vlan, MAC1,MAC2).
>>
>> Is it possible to set any field to mark the last ESADI LSP fragment
>> send? This will help the receiving RB
>> to know when to start comparing the LSPs for noticing any change in
>> MAC association. Also is it possible to send
>> the MACs that were lost(marking them by some flag), the comparison
>> algorithm will be quicker if that is done.
>>
>> Thank you,
>> Regards,
>> Somnath
>> _______________________________________________
>> trill mailing list
>> trill@ietf.org
>> https://www.ietf.org/mailman/listinfo/trill
>
>

From nordmark@acm.org  Wed Aug 15 15:11:52 2012
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Subject: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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We are trying to understand if this document is getting close to WG last 
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide 
comments.

Thanks,
    Erik and Donald

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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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I had sent out comments on this a while back, and none of them have been 
addressed.
To summarize the issues:
1) What happens when one of the CE-rbridge links fails? The draft doesn't 
talk about this scenario. I listed the possible solutions in my earlier 
email; are the authors planning to adopt one of them, or do they have 
another fix in mind?

2) The solution doesn't work if the CE switches are interconnected, but 
this is but this is not documented in the draft. What happens if they get 
interconnected accidentally? What is the process for recovery? This needs 
to be discussed in the draft.
More details here:
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html 




From:   Erik Nordmark <nordmark@acm.org>
To:     "trill@ietf.org" <trill@ietf.org>
Date:   08/15/2012 03:14 PM
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) 
for TRILL       - draft-ietf-trill-cmt-00
Sent by:        trill-bounces@ietf.org




We are trying to understand if this document is getting close to WG last 
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide 
comments.

Thanks,
    Erik and Donald
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill



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<font size=2 face="sans-serif">I had sent out comments on this a while
back, and none of them have been addressed.</font>
<br><font size=2 face="sans-serif">To summarize the issues:</font>
<br><font size=2 face="sans-serif">1) What happens when one of the CE-rbridge
links fails? The draft doesn't talk about this scenario. I listed the possible
solutions in my earlier email; are the authors planning to adopt one of
them, or do they have another fix in mind?</font>
<br>
<br><font size=2 face="sans-serif">2) The solution doesn't work if the
CE switches are interconnected, but this is but this is not documented
in the draft. What happens if they get interconnected accidentally? What
is the process for recovery? This needs to be discussed in the draft.</font>
<br><font size=2 face="sans-serif">More details here:</font>
<br><a href="http://www.ietf.org/mail-archive/web/trill/current/msg04984.html"><font size=3 color=blue><u>http://www.ietf.org/mail-archive/web/trill/current/msg04984.html</u></font></a><font size=3>
</font>
<br>
<br>
<br>
<br>
<br><font size=1 color=#5f5f5f face="sans-serif">From: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">Erik Nordmark &lt;nordmark@acm.org&gt;</font>
<br><font size=1 color=#5f5f5f face="sans-serif">To: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">&quot;trill@ietf.org&quot;
&lt;trill@ietf.org&gt;</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Date: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">08/15/2012 03:14 PM</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Subject: &nbsp; &nbsp;
&nbsp; &nbsp;</font><font size=1 face="sans-serif">[trill] Any
comments on Coordinated Multicast Trees (CMT) for TRILL &nbsp; &nbsp; &nbsp;
&nbsp;- draft-ietf-trill-cmt-00</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Sent by: &nbsp; &nbsp;
&nbsp; &nbsp;</font><font size=1 face="sans-serif">trill-bounces@ietf.org</font>
<br>
<hr noshade>
<br>
<br>
<br><tt><font size=2><br>
We are trying to understand if this document is getting close to WG last
<br>
call, but we don't know how many have read the document.<br>
<br>
If you have reviewed the document, please let us know.<br>
If not, this might be a good time to review the document and provide <br>
comments.<br>
<br>
Thanks,<br>
 &nbsp; &nbsp;Erik and Donald<br>
_______________________________________________<br>
trill mailing list<br>
trill@ietf.org<br>
</font></tt><a href=https://www.ietf.org/mailman/listinfo/trill><tt><font size=2>https://www.ietf.org/mailman/listinfo/trill</font></tt></a><tt><font size=2><br>
<br>
</font></tt>
<br>
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From zhangmingui@huawei.com  Wed Aug 15 17:56:05 2012
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From: Mingui Zhang <zhangmingui@huawei.com>
To: Sunny Rajagopalan <sunny.rajagopalan@us.ibm.com>, Erik Nordmark <nordmark@acm.org>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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I had read this draft.



IMO, the updated version focus on the specific RPFC issue in active-active =
multi-homing. The failure recovery from links fails  can be regarded as ano=
ther common issue of active-active multi-homing, which may  be handled in a=
 separate ID.

Thanks,
Mingui

From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of S=
unny Rajagopalan
Sent: Thursday, August 16, 2012 6:28 AM
To: Erik Nordmark
Cc: trill-bounces@ietf.org; trill@ietf.org
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00

I had sent out comments on this a while back, and none of them have been ad=
dressed.
To summarize the issues:
1) What happens when one of the CE-rbridge links fails? The draft doesn't t=
alk about this scenario. I listed the possible solutions in my earlier emai=
l; are the authors planning to adopt one of them, or do they have another f=
ix in mind?

2) The solution doesn't work if the CE switches are interconnected, but thi=
s is but this is not documented in the draft. What happens if they get inte=
rconnected accidentally? What is the process for recovery? This needs to be=
 discussed in the draft.
More details here:
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html




From:        Erik Nordmark <nordmark@acm.org>
To:        "trill@ietf.org" <trill@ietf.org>
Date:        08/15/2012 03:14 PM
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) f=
or TRILL        - draft-ietf-trill-cmt-00
Sent by:        trill-bounces@ietf.org
________________________________




We are trying to understand if this document is getting close to WG last
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide
comments.

Thanks,
   Erik and Donald
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill


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<p class=3D"MsoPlainText"><span lang=3D"EN-US">I had read this draft. <o:p>=
</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">IMO, the updated version foc=
us on the specific RPFC issue in active-active multi-homing. The failure re=
covery from links fails &nbsp;can be regarded as another common issue of ac=
tive-active multi-homing, which may &nbsp;be handled
 in a separate ID. <o:p></o:p></span></p>
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;</o:p></span></p>
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family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thanks,<o:=
p></o:p></span></p>
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family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Mingui<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
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<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> trill-bounces@ietf.org [mailto:trill-bounces@ietf.org=
]
<b>On Behalf Of </b>Sunny Rajagopalan<br>
<b>Sent:</b> Thursday, August 16, 2012 6:28 AM<br>
<b>To:</b> Erik Nordmark<br>
<b>Cc:</b> trill-bounces@ietf.org; trill@ietf.org<br>
<b>Subject:</b> Re: [trill] Any comments on Coordinated Multicast Trees (CM=
T) for TRILL - draft-ietf-trill-cmt-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;">I had sent out comments on=
 this a while back, and none of them have been addressed.</span><span lang=
=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">To summarize the issues:</span><span lang=
=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">1) What happens when one of the CE-rbridge=
 links fails? The draft doesn't talk about this scenario. I listed the poss=
ible solutions in my earlier email; are the authors planning
 to adopt one of them, or do they have another fix in mind?</span><span lan=
g=3D"EN-US">
<br>
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">2) The solution doesn't work if the CE swi=
tches are interconnected, but this is but this is not documented in the dra=
ft. What happens if they get interconnected accidentally?
 What is the process for recovery? This needs to be discussed in the draft.=
</span><span lang=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">More details here:</span><span lang=3D"EN-=
US">
<br>
<a href=3D"http://www.ietf.org/mail-archive/web/trill/current/msg04984.html=
">http://www.ietf.org/mail-archive/web/trill/current/msg04984.html</a>
<br>
<br>
<br>
<br>
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">From: &nbsp; &nbsp; &nbsp; &n=
bsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;=
Arial&quot;,&quot;sans-serif&quot;">Erik Nordmark &lt;nordmark@acm.org&gt;<=
/span><span lang=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">To: &nbsp; &nbsp; &nbsp; &nbs=
p;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;">&quot;trill@ietf.org&quot; &lt;trill@ietf=
.org&gt;</span><span lang=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">Date: &nbsp; &nbsp; &nbsp; &n=
bsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;=
Arial&quot;,&quot;sans-serif&quot;">08/15/2012 03:14 PM</span><span lang=3D=
"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">Subject: &nbsp; &nbsp; &nbsp;=
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&qu=
ot;Arial&quot;,&quot;sans-serif&quot;">[trill] Any comments on Coordinated =
Multicast Trees (CMT) for
 TRILL &nbsp; &nbsp; &nbsp; &nbsp;- draft-ietf-trill-cmt-00</span><span lan=
g=3D"EN-US"> <br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">Sent by: &nbsp; &nbsp; &nbsp;=
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&qu=
ot;Arial&quot;,&quot;sans-serif&quot;">trill-bounces@ietf.org</span><span l=
ang=3D"EN-US">
<o:p></o:p></span></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 lang=3D"EN-US">
<hr size=3D"2" width=3D"100%" noshade=3D"" style=3D"color:#A0A0A0" align=3D=
"center">
</span></div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span lang=3D"EN-US">=
<br>
<br>
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;"><br>
<tt>We are trying to understand if this document is getting close to WG las=
t </tt>
<br>
<tt>call, but we don't know how many have read the document.</tt><br>
<br>
<tt>If you have reviewed the document, please let us know.</tt><br>
<tt>If not, this might be a good time to review the document and provide </=
tt><br>
<tt>comments.</tt><br>
<br>
<tt>Thanks,</tt><br>
<tt>&nbsp; &nbsp;Erik and Donald</tt><br>
<tt>_______________________________________________</tt><br>
<tt>trill mailing list</tt><br>
<tt>trill@ietf.org</tt><br>
</span><span lang=3D"EN-US"><a href=3D"https://www.ietf.org/mailman/listinf=
o/trill"><tt><span style=3D"font-size:10.0pt">https://www.ietf.org/mailman/=
listinfo/trill</span></tt></a></span><span lang=3D"EN-US" style=3D"font-siz=
e:10.0pt;font-family:&quot;Courier New&quot;"><br>
<br>
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
</body>
</html>

--_000_4552F0907735844E9204A62BBDD325E731FDAF02SZXEML507MBSchi_--

From sunny.rajagopalan@us.ibm.com  Wed Aug 15 18:36:43 2012
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To: "Mingui Zhang" <zhangmingui@huawei.com>
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Date: Wed, 15 Aug 2012 19:35:47 -0600
From: Sunny Rajagopalan <sunny.rajagopalan@us.ibm.com>
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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Mingui,
This solution cannot be evaluated or deployed without knowing it's approach=
 towards link failures.=20
IMO, the draft is incomplete without it, and a solution should not be defer=
red to another draft.
--
Sunny


On Aug 15, 2012, at 5:54 PM, "Mingui Zhang" <zhangmingui@huawei.com> wrote:

I had read this draft.
=20
IMO, the updated version focus on the specific RPFC issue in active-active =
multi-homing. The failure recovery from links fails  can be regarded as ano=
ther common issue of active-active multi-homing, which may  be handled in a=
 separate ID.
=20
Thanks,
Mingui
=20
From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of S=
unny Rajagopalan
Sent: Thursday, August 16, 2012 6:28 AM
To: Erik Nordmark
Cc: trill-bounces@ietf.org; trill@ietf.org
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00
=20
I had sent out comments on this a while back, and none of them have been ad=
dressed.=20
To summarize the issues:=20
1) What happens when one of the CE-rbridge links fails? The draft doesn't t=
alk about this scenario. I listed the possible solutions in my earlier emai=
l; are the authors planning to adopt one of them, or do they have another f=
ix in mind?=20

2) The solution doesn't work if the CE switches are interconnected, but thi=
s is but this is not documented in the draft. What happens if they get inte=
rconnected accidentally? What is the process for recovery? This needs to be=
 discussed in the draft.=20
More details here:=20
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html=20




From:        Erik Nordmark <nordmark@acm.org>=20
To:        "trill@ietf.org" <trill@ietf.org>=20
Date:        08/15/2012 03:14 PM=20
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) f=
or TRILL        - draft-ietf-trill-cmt-00=20
Sent by:        trill-bounces@ietf.org




We are trying to understand if this document is getting close to WG last=20
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide=20
comments.

Thanks,
   Erik and Donald
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill

=

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<html><head></head><body bgcolor=3D"#FFFFFF"><div>Mingui,</div><div>This so=
lution cannot be evaluated or deployed without knowing it's approach toward=
s link failures.&nbsp;</div><div>IMO, the draft is incomplete without it, a=
nd a solution should not be deferred to another draft.</div><div>--</div><d=
iv>Sunny</div><div><br><br>On Aug 15, 2012, at 5:54 PM, "Mingui Zhang" &lt;=
<a href=3D"mailto:zhangmingui@huawei.com">zhangmingui@huawei.com</a>&gt; wr=
ote:<br><br></div><div></div><div>

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii">
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<div class=3D"WordSection1">
<p class=3D"MsoPlainText"><span lang=3D"EN-US">I had read this draft. <o:p>=
</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">IMO, the updated version foc=
us on the specific RPFC issue in active-active multi-homing. The failure re=
covery from links fails &nbsp;can be regarded as another common issue of ac=
tive-active multi-homing, which may &nbsp;be handled
 in a separate ID. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thanks,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Mingui<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> <a href=3D"mailto:trill-bounces@ietf.org">trill-bounc=
es@ietf.org</a> [mailto:trill-bounces@ietf.org]
<b>On Behalf Of </b>Sunny Rajagopalan<br>
<b>Sent:</b> Thursday, August 16, 2012 6:28 AM<br>
<b>To:</b> Erik Nordmark<br>
<b>Cc:</b> <a href=3D"mailto:trill-bounces@ietf.org">trill-bounces@ietf.org=
</a>; <a href=3D"mailto:trill@ietf.org">trill@ietf.org</a><br>
<b>Subject:</b> Re: [trill] Any comments on Coordinated Multicast Trees (CM=
T) for TRILL - draft-ietf-trill-cmt-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;">I had sent out comments on=
 this a while back, and none of them have been addressed.</span><span lang=
=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">To summarize the issues:</span><span lang=
=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">1) What happens when one of the CE-rbridge=
 links fails? The draft doesn't talk about this scenario. I listed the poss=
ible solutions in my earlier email; are the authors planning
 to adopt one of them, or do they have another fix in mind?</span><span lan=
g=3D"EN-US">
<br>
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">2) The solution doesn't work if the CE swi=
tches are interconnected, but this is but this is not documented in the dra=
ft. What happens if they get interconnected accidentally?
 What is the process for recovery? This needs to be discussed in the draft.=
</span><span lang=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">More details here:</span><span lang=3D"EN-=
US">
<br>
<a href=3D"http://www.ietf.org/mail-archive/web/trill/current/msg04984.html=
">http://www.ietf.org/mail-archive/web/trill/current/msg04984.html</a>
<br>
<br>
<br>
<br>
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">From: &nbsp; &nbsp; &nbsp; &n=
bsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;=
Arial&quot;,&quot;sans-serif&quot;">Erik Nordmark &lt;<a href=3D"mailto:nor=
dmark@acm.org">nordmark@acm.org</a>&gt;</span><span lang=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">To: &nbsp; &nbsp; &nbsp; &nbs=
p;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;">"<a href=3D"mailto:trill@ietf.org">trill@=
ietf.org</a>" &lt;<a href=3D"mailto:trill@ietf.org">trill@ietf.org</a>&gt;<=
/span><span lang=3D"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">Date: &nbsp; &nbsp; &nbsp; &n=
bsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;=
Arial&quot;,&quot;sans-serif&quot;">08/15/2012 03:14 PM</span><span lang=3D=
"EN-US">
<br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">Subject: &nbsp; &nbsp; &nbsp;=
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&qu=
ot;Arial&quot;,&quot;sans-serif&quot;">[trill] Any comments on Coordinated =
Multicast Trees (CMT) for
 TRILL &nbsp; &nbsp; &nbsp; &nbsp;- draft-ietf-trill-cmt-00</span><span lan=
g=3D"EN-US"> <br>
</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#5F5F5F">Sent by: &nbsp; &nbsp; &nbsp;=
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:7.5pt;font-family:&qu=
ot;Arial&quot;,&quot;sans-serif&quot;"><a href=3D"mailto:trill-bounces@ietf=
.org">trill-bounces@ietf.org</a></span><span lang=3D"EN-US">
<o:p></o:p></span></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 lang=3D"EN-US">
<hr size=3D"2" width=3D"100%" noshade=3D"" style=3D"color:#A0A0A0" align=3D=
"center">
</span></div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span lang=3D"EN-US">=
<br>
<br>
<br>
</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;"><br>
<tt>We are trying to understand if this document is getting close to WG las=
t </tt>
<br>
<tt>call, but we don't know how many have read the document.</tt><br>
<br>
<tt>If you have reviewed the document, please let us know.</tt><br>
<tt>If not, this might be a good time to review the document and provide </=
tt><br>
<tt>comments.</tt><br>
<br>
<tt>Thanks,</tt><br>
<tt>&nbsp; &nbsp;Erik and Donald</tt><br>
<tt>=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F</t=
t><br>
<tt>trill mailing list</tt><br>
<tt><a href=3D"mailto:trill@ietf.org">trill@ietf.org</a></tt><br>
</span><span lang=3D"EN-US"><a href=3D"https://www.ietf.org/mailman/listinf=
o/trill"><tt><span style=3D"font-size:10.0pt">https://www.ietf.org/mailman/=
listinfo/trill</span></tt></a></span><span lang=3D"EN-US" style=3D"font-siz=
e:10.0pt;font-family:&quot;Courier New&quot;"><br>
<br>
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>


</div></body></html>=
=

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From: "Rohit Watve (rwatve)" <rwatve@cisco.com>
To: Mingui Zhang <zhangmingui@huawei.com>, Sunny Rajagopalan <sunny.rajagopalan@us.ibm.com>, Erik Nordmark <nordmark@acm.org>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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Date: Thu, 16 Aug 2012 02:12:09 +0000
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I have read the draft and it solves the RPF issues in case of active-active=
 edge.
I support it in WG last call.

Thanks
Rohit

From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of M=
ingui Zhang
Sent: Wednesday, August 15, 2012 5:54 PM
To: Sunny Rajagopalan; Erik Nordmark
Cc: trill-bounces@ietf.org; trill@ietf.org
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00


I had read this draft.



IMO, the updated version focus on the specific RPFC issue in active-active =
multi-homing. The failure recovery from links fails  can be regarded as ano=
ther common issue of active-active multi-homing, which may  be handled in a=
 separate ID.

Thanks,
Mingui

From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of S=
unny Rajagopalan
Sent: Thursday, August 16, 2012 6:28 AM
To: Erik Nordmark
Cc: trill-bounces@ietf.org; trill@ietf.org
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00

I had sent out comments on this a while back, and none of them have been ad=
dressed.
To summarize the issues:
1) What happens when one of the CE-rbridge links fails? The draft doesn't t=
alk about this scenario. I listed the possible solutions in my earlier emai=
l; are the authors planning to adopt one of them, or do they have another f=
ix in mind?

2) The solution doesn't work if the CE switches are interconnected, but thi=
s is but this is not documented in the draft. What happens if they get inte=
rconnected accidentally? What is the process for recovery? This needs to be=
 discussed in the draft.
More details here:
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html




From:        Erik Nordmark <nordmark@acm.org>
To:        "trill@ietf.org" <trill@ietf.org>
Date:        08/15/2012 03:14 PM
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) f=
or TRILL        - draft-ietf-trill-cmt-00
Sent by:        trill-bounces@ietf.org
________________________________




We are trying to understand if this document is getting close to WG last
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide
comments.

Thanks,
   Erik and Donald
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D">I have read the draft and it solves the RPF issues in case o=
f active-active edge.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D">I support it in WG last call.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D">Thanks<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D">Rohit<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> trill-bo=
unces@ietf.org [mailto:trill-bounces@ietf.org]
<b>On Behalf Of </b>Mingui Zhang<br>
<b>Sent:</b> Wednesday, August 15, 2012 5:54 PM<br>
<b>To:</b> Sunny Rajagopalan; Erik Nordmark<br>
<b>Cc:</b> trill-bounces@ietf.org; trill@ietf.org<br>
<b>Subject:</b> Re: [trill] Any comments on Coordinated Multicast Trees (CM=
T) for TRILL - draft-ietf-trill-cmt-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I had read this draft. <o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">IMO, the updated version focus on the specific RP=
FC issue in active-active multi-homing. The failure recovery from links fai=
ls &nbsp;can be regarded as another common issue of active-active multi-hom=
ing, which may &nbsp;be handled in a separate
 ID. <o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D">Mingui<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;
color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> trill-bo=
unces@ietf.org [mailto:trill-bounces@ietf.org]
<b>On Behalf Of </b>Sunny Rajagopalan<br>
<b>Sent:</b> Thursday, August 16, 2012 6:28 AM<br>
<b>To:</b> Erik Nordmark<br>
<b>Cc:</b> trill-bounces@ietf.org; trill@ietf.org<br>
<b>Subject:</b> Re: [trill] Any comments on Coordinated Multicast Trees (CM=
T) for TRILL - draft-ietf-trill-cmt-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;">I had sent out comments on this a while b=
ack, and none of them have been addressed.</span>
<br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">To summarize the issues:</span>
<br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">1) What happens when one of the CE-rbridge links fails? The draf=
t doesn't talk about this scenario. I listed the possible solutions in my e=
arlier email; are the authors planning to adopt one of
 them, or do they have another fix in mind?</span> <br>
<br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">2) The solution doesn't work if the CE switches are interconnect=
ed, but this is but this is not documented in the draft. What happens if th=
ey get interconnected accidentally? What is the process
 for recovery? This needs to be discussed in the draft.</span> <br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">More details here:</span>
<br>
<a href=3D"http://www.ietf.org/mail-archive/web/trill/current/msg04984.html=
">http://www.ietf.org/mail-archive/web/trill/current/msg04984.html</a>
<br>
<br>
<br>
<br>
<br>
<span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-ser=
if&quot;;color:#5F5F5F">From: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=
=3D"font-size:7.5pt;font-family:
&quot;Arial&quot;,&quot;sans-serif&quot;">Erik Nordmark &lt;nordmark@acm.or=
g&gt;</span>
<br>
<span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-ser=
if&quot;;color:#5F5F5F">To: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=
=3D"font-size:7.5pt;font-family:
&quot;Arial&quot;,&quot;sans-serif&quot;">&quot;trill@ietf.org&quot; &lt;tr=
ill@ietf.org&gt;</span>
<br>
<span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-ser=
if&quot;;color:#5F5F5F">Date: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=
=3D"font-size:7.5pt;font-family:
&quot;Arial&quot;,&quot;sans-serif&quot;">08/15/2012 03:14 PM</span>
<br>
<span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-ser=
if&quot;;color:#5F5F5F">Subject: &nbsp; &nbsp; &nbsp; &nbsp;</span><span st=
yle=3D"font-size:7.5pt;font-family:
&quot;Arial&quot;,&quot;sans-serif&quot;">[trill] Any comments on Coordinat=
ed Multicast Trees (CMT) for TRILL &nbsp; &nbsp; &nbsp; &nbsp;- draft-ietf-=
trill-cmt-00</span>
<br>
<span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-ser=
if&quot;;color:#5F5F5F">Sent by: &nbsp; &nbsp; &nbsp; &nbsp;</span><span st=
yle=3D"font-size:7.5pt;font-family:
&quot;Arial&quot;,&quot;sans-serif&quot;">trill-bounces@ietf.org</span>
<o:p></o:p></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"2" width=3D"100%" noshade=3D"" style=3D"color:#A0A0A0" align=3D=
"center">
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
<br>
<br>
<span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><br>
<tt>We are trying to understand if this document is getting close to WG las=
t </tt>
<br>
<tt>call, but we don't know how many have read the document.</tt><br>
<br>
<tt>If you have reviewed the document, please let us know.</tt><br>
<tt>If not, this might be a good time to review the document and provide </=
tt><br>
<tt>comments.</tt><br>
<br>
<tt>Thanks,</tt><br>
<tt>&nbsp; &nbsp;Erik and Donald</tt><br>
<tt>_______________________________________________</tt><br>
<tt>trill mailing list</tt><br>
<tt>trill@ietf.org</tt><br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/trill"><tt><span st=
yle=3D"font-size:10.0pt">https://www.ietf.org/mailman/listinfo/trill</span>=
</tt></a><o:p></o:p></p>
</div>
</div>
</body>
</html>

--_000_56285561394EF84F8B369395C9D0265607A4BBxmbalnx15ciscocom_--

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To: Sunny Rajagopalan <sunny.rajagopalan@us.ibm.com>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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From varshah@cisco.com  Thu Aug 16 11:32:47 2012
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From: "Varun Shah (varshah)" <varshah@cisco.com>
To: "Rohit Watve (rwatve)" <rwatve@cisco.com>, Mingui Zhang <zhangmingui@huawei.com>, Sunny Rajagopalan <sunny.rajagopalan@us.ibm.com>, Erik Nordmark <nordmark@acm.org>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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Date: Thu, 16 Aug 2012 18:32:44 +0000
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--_000_CC527A2B15FFCvarshahciscocom_
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I have read the draft and support it for the WG last call.

Thanks,
-Varun

From: "Rohit Watve (rwatve)" <rwatve@cisco.com<mailto:rwatve@cisco.com>>
Date: Wednesday, August 15, 2012 7:12 PM
To: Mingui Zhang <zhangmingui@huawei.com<mailto:zhangmingui@huawei.com>>, S=
unny Rajagopalan <sunny.rajagopalan@us.ibm.com<mailto:sunny.rajagopalan@us.=
ibm.com>>, Erik Nordmark <nordmark@acm.org<mailto:nordmark@acm.org>>
Cc: "trill-bounces@ietf.org<mailto:trill-bounces@ietf.org>" <trill-bounces@=
ietf.org<mailto:trill-bounces@ietf.org>>, "trill@ietf.org<mailto:trill@ietf=
.org>" <trill@ietf.org<mailto:trill@ietf.org>>
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00

I have read the draft and it solves the RPF issues in case of active-active=
 edge.
I support it in WG last call.

Thanks
Rohit

From: trill-bounces@ietf.org<mailto:trill-bounces@ietf.org> [mailto:trill-b=
ounces@ietf.org]On Behalf Of Mingui Zhang
Sent: Wednesday, August 15, 2012 5:54 PM
To: Sunny Rajagopalan; Erik Nordmark
Cc: trill-bounces@ietf.org<mailto:trill-bounces@ietf.org>; trill@ietf.org<m=
ailto:trill@ietf.org>
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00


I had read this draft.



IMO, the updated version focus on the specific RPFC issue in active-active =
multi-homing. The failure recovery from links fails  can be regarded as ano=
ther common issue of active-active multi-homing, which may  be handled in a=
 separate ID.

Thanks,
Mingui

From: trill-bounces@ietf.org<mailto:trill-bounces@ietf.org> [mailto:trill-b=
ounces@ietf.org] On Behalf Of Sunny Rajagopalan
Sent: Thursday, August 16, 2012 6:28 AM
To: Erik Nordmark
Cc: trill-bounces@ietf.org<mailto:trill-bounces@ietf.org>; trill@ietf.org<m=
ailto:trill@ietf.org>
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00

I had sent out comments on this a while back, and none of them have been ad=
dressed.
To summarize the issues:
1) What happens when one of the CE-rbridge links fails? The draft doesn't t=
alk about this scenario. I listed the possible solutions in my earlier emai=
l; are the authors planning to adopt one of them, or do they have another f=
ix in mind?

2) The solution doesn't work if the CE switches are interconnected, but thi=
s is but this is not documented in the draft. What happens if they get inte=
rconnected accidentally? What is the process for recovery? This needs to be=
 discussed in the draft.
More details here:
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html




From:        Erik Nordmark <nordmark@acm.org<mailto:nordmark@acm.org>>
To:        "trill@ietf.org<mailto:trill@ietf.org>" <trill@ietf.org<mailto:t=
rill@ietf.org>>
Date:        08/15/2012 03:14 PM
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) f=
or TRILL        - draft-ietf-trill-cmt-00
Sent by:        trill-bounces@ietf.org<mailto:trill-bounces@ietf.org>
________________________________




We are trying to understand if this document is getting close to WG last
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide
comments.

Thanks,
   Erik and Donald
_______________________________________________
trill mailing list
trill@ietf.org<mailto:trill@ietf.org>
https://www.ietf.org/mailman/listinfo/trill

--_000_CC527A2B15FFCvarshahciscocom_
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ly: Calibri, sans-serif; ">
<div>I have read the draft and support it for the WG last call.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>-Varun</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
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<span style=3D"font-weight:bold">From: </span>&quot;Rohit Watve (rwatve)&qu=
ot; &lt;<a href=3D"mailto:rwatve@cisco.com">rwatve@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, August 15, 2012 7:=
12 PM<br>
<span style=3D"font-weight:bold">To: </span>Mingui Zhang &lt;<a href=3D"mai=
lto:zhangmingui@huawei.com">zhangmingui@huawei.com</a>&gt;, Sunny Rajagopal=
an &lt;<a href=3D"mailto:sunny.rajagopalan@us.ibm.com">sunny.rajagopalan@us=
.ibm.com</a>&gt;, Erik Nordmark &lt;<a href=3D"mailto:nordmark@acm.org">nor=
dmark@acm.org</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:trill-b=
ounces@ietf.org">trill-bounces@ietf.org</a>&quot; &lt;<a href=3D"mailto:tri=
ll-bounces@ietf.org">trill-bounces@ietf.org</a>&gt;, &quot;<a href=3D"mailt=
o:trill@ietf.org">trill@ietf.org</a>&quot; &lt;<a href=3D"mailto:trill@ietf=
.org">trill@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [trill] Any comments o=
n Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00<br>
</div>
<div><br>
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<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1=
25); font-family: Calibri, sans-serif; ">I have read the draft and it solve=
s the RPF issues in case of active-active edge.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1=
25); font-family: Calibri, sans-serif; ">I support it in WG last call.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1=
25); font-family: Calibri, sans-serif; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1=
25); font-family: Calibri, sans-serif; ">Thanks<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1=
25); font-family: Calibri, sans-serif; ">Rohit<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1=
25); font-family: Calibri, sans-serif; "><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 10pt; font-family: Taho=
ma, sans-serif; ">From:</span></b><span style=3D"font-size: 10pt; font-fami=
ly: Tahoma, sans-serif; ">
<a href=3D"mailto:trill-bounces@ietf.org">trill-bounces@ietf.org</a> [<a hr=
ef=3D"mailto:trill-bounces@ietf.org">mailto:trill-bounces@ietf.org</a>]<b>O=
n Behalf Of
</b>Mingui Zhang<br>
<b>Sent:</b> Wednesday, August 15, 2012 5:54 PM<br>
<b>To:</b> Sunny Rajagopalan; Erik Nordmark<br>
<b>Cc:</b> <a href=3D"mailto:trill-bounces@ietf.org">trill-bounces@ietf.org=
</a>; <a href=3D"mailto:trill@ietf.org">
trill@ietf.org</a><br>
<b>Subject:</b> Re: [trill] Any comments on Coordinated Multicast Trees (CM=
T) for TRILL - draft-ietf-trill-cmt-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I had read this draft. <o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">IMO, the updated version focus on the specific RP=
FC issue in active-active multi-homing. The failure recovery from links fai=
ls &nbsp;can be regarded as another common issue of active-active multi-hom=
ing, which may &nbsp;be handled in a separate
 ID. <o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; color: rgb(31, 73,=
 125); font-family: Calibri, sans-serif; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; color: rgb(31, 73,=
 125); font-family: Calibri, sans-serif; ">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; color: rgb(31, 73,=
 125); font-family: Calibri, sans-serif; ">Mingui<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; color: rgb(31, 73,=
 125); font-family: Calibri, sans-serif; "><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 10pt; font-family: Taho=
ma, sans-serif; ">From:</span></b><span style=3D"font-size: 10pt; font-fami=
ly: Tahoma, sans-serif; ">
<a href=3D"mailto:trill-bounces@ietf.org">trill-bounces@ietf.org</a> [<a hr=
ef=3D"mailto:trill-bounces@ietf.org">mailto:trill-bounces@ietf.org</a>]
<b>On Behalf Of </b>Sunny Rajagopalan<br>
<b>Sent:</b> Thursday, August 16, 2012 6:28 AM<br>
<b>To:</b> Erik Nordmark<br>
<b>Cc:</b> <a href=3D"mailto:trill-bounces@ietf.org">trill-bounces@ietf.org=
</a>; <a href=3D"mailto:trill@ietf.org">
trill@ietf.org</a><br>
<b>Subject:</b> Re: [trill] Any comments on Coordinated Multicast Trees (CM=
T) for TRILL - draft-ietf-trill-cmt-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: Arial, =
sans-serif; ">I had sent out comments on this a while back, and none of the=
m have been addressed.</span><br>
<span style=3D"font-size: 10pt; font-family: Arial, sans-serif; ">To summar=
ize the issues:</span><br>
<span style=3D"font-size: 10pt; font-family: Arial, sans-serif; ">1) What h=
appens when one of the CE-rbridge links fails? The draft doesn't talk about=
 this scenario. I listed the possible solutions in my earlier email; are th=
e authors planning to adopt one of
 them, or do they have another fix in mind?</span> <br>
<br>
<span style=3D"font-size: 10pt; font-family: Arial, sans-serif; ">2) The so=
lution doesn't work if the CE switches are interconnected, but this is but =
this is not documented in the draft. What happens if they get interconnecte=
d accidentally? What is the process
 for recovery? This needs to be discussed in the draft.</span> <br>
<span style=3D"font-size: 10pt; font-family: Arial, sans-serif; ">More deta=
ils here:</span><br>
<a href=3D"http://www.ietf.org/mail-archive/web/trill/current/msg04984.html=
">http://www.ietf.org/mail-archive/web/trill/current/msg04984.html</a><br>
<br>
<br>
<br>
<br>
<span style=3D"font-size: 7.5pt; color: rgb(95, 95, 95); font-family: Arial=
, sans-serif; ">From: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=3D"font=
-size: 7.5pt; font-family: Arial, sans-serif; ">Erik Nordmark &lt;<a href=
=3D"mailto:nordmark@acm.org">nordmark@acm.org</a>&gt;</span><br>
<span style=3D"font-size: 7.5pt; color: rgb(95, 95, 95); font-family: Arial=
, sans-serif; ">To: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=3D"font-s=
ize: 7.5pt; font-family: Arial, sans-serif; ">&quot;<a href=3D"mailto:trill=
@ietf.org">trill@ietf.org</a>&quot; &lt;<a href=3D"mailto:trill@ietf.org">t=
rill@ietf.org</a>&gt;</span><br>
<span style=3D"font-size: 7.5pt; color: rgb(95, 95, 95); font-family: Arial=
, sans-serif; ">Date: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=3D"font=
-size: 7.5pt; font-family: Arial, sans-serif; ">08/15/2012 03:14 PM</span><=
br>
<span style=3D"font-size: 7.5pt; color: rgb(95, 95, 95); font-family: Arial=
, sans-serif; ">Subject: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=3D"f=
ont-size: 7.5pt; font-family: Arial, sans-serif; ">[trill] Any comments on =
Coordinated Multicast Trees (CMT) for TRILL &nbsp; &nbsp; &nbsp; &nbsp;- dr=
aft-ietf-trill-cmt-00</span><br>
<span style=3D"font-size: 7.5pt; color: rgb(95, 95, 95); font-family: Arial=
, sans-serif; ">Sent by: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style=3D"f=
ont-size: 7.5pt; font-family: Arial, sans-serif; "><a href=3D"mailto:trill-=
bounces@ietf.org">trill-bounces@ietf.org</a></span><o:p></o:p></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"2" width=3D"100%" noshade=3D"" style=3D"color:#A0A0A0" align=3D=
"center">
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
<br>
<br>
<span style=3D"font-size: 10pt; font-family: 'Courier New'; "><br>
<tt>We are trying to understand if this document is getting close to WG las=
t </tt>
<br>
<tt>call, but we don't know how many have read the document.</tt><br>
<br>
<tt>If you have reviewed the document, please let us know.</tt><br>
<tt>If not, this might be a good time to review the document and provide </=
tt><br>
<tt>comments.</tt><br>
<br>
<tt>Thanks,</tt><br>
<tt>&nbsp; &nbsp;Erik and Donald</tt><br>
<tt>_______________________________________________</tt><br>
<tt>trill mailing list</tt><br>
<tt><a href=3D"mailto:trill@ietf.org">trill@ietf.org</a></tt><br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/trill"><tt><span st=
yle=3D"font-size:10.0pt">https://www.ietf.org/mailman/listinfo/trill</span>=
</tt></a><o:p></o:p></p>
</div>
</div>
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From: "Ramkumar Parameswaran (ramkumar)" <ramkumar@cisco.com>
To: Erik Nordmark <nordmark@acm.org>, "trill@ietf.org" <trill@ietf.org>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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Date: Thu, 16 Aug 2012 18:41:24 +0000
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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Have read the document, and support the WG last call.

Thanks,

Ramkumar

On 8/15/12 3:11 PM, "Erik Nordmark" <nordmark@acm.org> wrote:

>
>We are trying to understand if this document is getting close to WG last
>call, but we don't know how many have read the document.
>
>If you have reviewed the document, please let us know.
>If not, this might be a good time to review the document and provide
>comments.
>
>Thanks,
>    Erik and Donald
>_______________________________________________
>trill mailing list
>trill@ietf.org
>https://www.ietf.org/mailman/listinfo/trill


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Date: Thu, 16 Aug 2012 22:27:06 -0700
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From: Ayan Banerjee <ayabaner@gmail.com>
To: liao.ting@zte.com.cn
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Cc: Erik Nordmark <nordmark@acm.org>, trill-bounces@ietf.org, "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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Liao,

Just to get the entire context of the Section that you quote from the RFC:

   How an ingress RBridge chooses the distribution tree or trees that it
   uses for multi-destination frames is beyond the scope of this
   document.  However, for the reasons stated above, in the absence of
   other factors, a good choice is the tree whose root is least cost
   from the ingress RBridge and that is the default for an ingress
   RBridge that uses a single tree to distribute multi-destination
   frames.


The RFC clearly states that it is outside its scope and has a
suggestion regarding root choice. This draft provides the "other
factors" to influence the choice of trees.

Thanks,
Ayan




On Thu, Aug 16, 2012 at 1:40 AM, <liao.ting@zte.com.cn> wrote:
>
>
> I have read this draft and have a question about section 5.1,
> it describes how to distribute the trees among edge RB members of a group=
 as follow:
>      Assign each tree to RBi such that tree number { (tree_number) %
>      k}+1 is assigned to RBridge i for tree_number from 1 to n. where n
>      is the number of trees and k is the number of RBridges considered
>      for tree allocation.
>
> And in RFC 6325 section 4.5 describes:
>    a good choice is the tree whose root is least cost
>    from the ingress RBridge and that is the default for an ingress
>    RBridge that uses a single tree to distribute multi-destination
>    frames.
>
> So, if a network has two trees, the first tree root is RBi and the second=
 tree root is RBj,
> a group has two member RBridges RB1 and RB2, numerically ascending order =
by SystemID such that RB1<RB2,
> RBi is assigned to RB1 and RBj is assigned to RB2 as described in this dr=
aft,
> but maybe RB1 is closer to RBj and RB2 is closer to RBi, does the solutio=
n care about this?
>
>
>
> Erik Nordmark <nordmark@acm.org>
> =B7=A2=BC=FE=C8=CB:  trill-bounces@ietf.org
>
> 2012-08-16 06:11
>
> =CA=D5=BC=FE=C8=CB
> "trill@ietf.org" <trill@ietf.org>
> =B3=AD=CB=CD
> =D6=F7=CC=E2
> [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL      =
  - draft-ietf-trill-cmt-00
>
>
>
>
>
>
> We are trying to understand if this document is getting close to WG last
> call, but we don't know how many have read the document.
>
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide
> comments.
>
> Thanks,
>    Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
>
>
>
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
>

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--=_alternative 002AF31F48257A5D_=--


From naveen@broadcom.com  Fri Aug 17 08:37:44 2012
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From: "Naveen Nimmu" <naveen@broadcom.com>
To: "'ramkumar@cisco.com'" <ramkumar@cisco.com>, "'nordmark@acm.org'" <nordmark@acm.org>, "'trill@ietf.org'" <trill@ietf.org>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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I have read the document and it solves a problem to support active - active=
 mode.
I support  WG call for the same.
Thanks
Naveen

----- Original Message -----
From: Ramkumar Parameswaran (ramkumar) [mailto:ramkumar@cisco.com]
Sent: Thursday, August 16, 2012 11:41 AM=0A=
To: Erik Nordmark <nordmark@acm.org>; trill@ietf.org <trill@ietf.org>
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00



Have read the document, and support the WG last call.

Thanks,

Ramkumar

On 8/15/12 3:11 PM, "Erik Nordmark" <nordmark@acm.org> wrote:

>
>We are trying to understand if this document is getting close to WG last
>call, but we don't know how many have read the document.
>
>If you have reviewed the document, please let us know.
>If not, this might be a good time to review the document and provide
>comments.
>
>Thanks,
>    Erik and Donald
>_______________________________________________
>trill mailing list
>trill@ietf.org
>https://www.ietf.org/mailman/listinfo/trill

_______________________________________________
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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I too have read the draft and support it for the WG last call.

Thanks,
Jon


On Fri, Aug 17, 2012 at 8:37 AM, Naveen Nimmu <naveen@broadcom.com> wrote:

> I have read the document and it solves a problem to support active -
> active mode.
> I support  WG call for the same.
> Thanks
> Naveen
>
> ----- Original Message -----
> From: Ramkumar Parameswaran (ramkumar) [mailto:ramkumar@cisco.com]
> Sent: Thursday, August 16, 2012 11:41 AM
> To: Erik Nordmark <nordmark@acm.org>; trill@ietf.org <trill@ietf.org>
> Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for
> TRILL - draft-ietf-trill-cmt-00
>
>
>
> Have read the document, and support the WG last call.
>
> Thanks,
>
> Ramkumar
>
> On 8/15/12 3:11 PM, "Erik Nordmark" <nordmark@acm.org> wrote:
>
> >
> >We are trying to understand if this document is getting close to WG last
> >call, but we don't know how many have read the document.
> >
> >If you have reviewed the document, please let us know.
> >If not, this might be a good time to review the document and provide
> >comments.
> >
> >Thanks,
> >    Erik and Donald
> >_______________________________________________
> >trill mailing list
> >trill@ietf.org
> >https://www.ietf.org/mailman/listinfo/trill
>
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
>
>
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
>



-- 
"Do not lie. And do not do what you hate."

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<div style=3D"color:rgb(34,34,34);font-family:Calibri,sans-serif;font-size:=
14px;background-color:rgb(255,255,255)">I too have read the draft and suppo=
rt it for the WG last call.</div><div style=3D"color:rgb(34,34,34);font-fam=
ily:Calibri,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<br></div><div style=3D"color:rgb(34,34,34);font-family:Calibri,sans-serif;=
font-size:14px;background-color:rgb(255,255,255)">Thanks,</div><div style=
=3D"color:rgb(34,34,34);font-family:Calibri,sans-serif;font-size:14px;backg=
round-color:rgb(255,255,255)">
Jon</div><div><br></div><br><div class=3D"gmail_quote">On Fri, Aug 17, 2012=
 at 8:37 AM, Naveen Nimmu <span dir=3D"ltr">&lt;<a href=3D"mailto:naveen@br=
oadcom.com" target=3D"_blank">naveen@broadcom.com</a>&gt;</span> wrote:<br>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
I have read the document and it solves a problem to support active - active=
 mode.<br>
I support =A0WG call for the same.<br>
Thanks<br>
<span class=3D"HOEnZb"><font color=3D"#888888">Naveen<br>
</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
----- Original Message -----<br>
From: Ramkumar Parameswaran (ramkumar) [mailto:<a href=3D"mailto:ramkumar@c=
isco.com">ramkumar@cisco.com</a>]<br>
Sent: Thursday, August 16, 2012 11:41 AM<br>
To: Erik Nordmark &lt;<a href=3D"mailto:nordmark@acm.org">nordmark@acm.org<=
/a>&gt;; <a href=3D"mailto:trill@ietf.org">trill@ietf.org</a> &lt;<a href=
=3D"mailto:trill@ietf.org">trill@ietf.org</a>&gt;<br>
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00<br>
<br>
<br>
<br>
Have read the document, and support the WG last call.<br>
<br>
Thanks,<br>
<br>
Ramkumar<br>
<br>
On 8/15/12 3:11 PM, &quot;Erik Nordmark&quot; &lt;<a href=3D"mailto:nordmar=
k@acm.org">nordmark@acm.org</a>&gt; wrote:<br>
<br>
&gt;<br>
&gt;We are trying to understand if this document is getting close to WG las=
t<br>
&gt;call, but we don&#39;t know how many have read the document.<br>
&gt;<br>
&gt;If you have reviewed the document, please let us know.<br>
&gt;If not, this might be a good time to review the document and provide<br=
>
&gt;comments.<br>
&gt;<br>
&gt;Thanks,<br>
&gt; =A0 =A0Erik and Donald<br>
&gt;_______________________________________________<br>
&gt;trill mailing list<br>
&gt;<a href=3D"mailto:trill@ietf.org">trill@ietf.org</a><br>
&gt;<a href=3D"https://www.ietf.org/mailman/listinfo/trill" target=3D"_blan=
k">https://www.ietf.org/mailman/listinfo/trill</a><br>
<br>
_______________________________________________<br>
trill mailing list<br>
<a href=3D"mailto:trill@ietf.org">trill@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/trill" target=3D"_blank">h=
ttps://www.ietf.org/mailman/listinfo/trill</a><br>
<br>
<br>
_______________________________________________<br>
trill mailing list<br>
<a href=3D"mailto:trill@ietf.org">trill@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/trill" target=3D"_blank">h=
ttps://www.ietf.org/mailman/listinfo/trill</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>=
&quot;Do not lie. And do not do what you hate.&quot;<br><br>

--20cf30780c643083e904c779795f--

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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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Are the authors of this draft planning to respond to these comments at 
all? A protocol spec that doesn't talk about what to do on link failure is 
incomplete, to say the least.



From:   Sunny Rajagopalan/Santa Clara/IBM@IBMUS
To:     Erik Nordmark <nordmark@acm.org>
Cc:     trill-bounces@ietf.org, "trill@ietf.org" <trill@ietf.org>
Date:   08/15/2012 03:28 PM
Subject:        Re: [trill] Any comments on Coordinated Multicast Trees 
(CMT) for TRILL - draft-ietf-trill-cmt-00
Sent by:        trill-bounces@ietf.org



I had sent out comments on this a while back, and none of them have been 
addressed. 
To summarize the issues: 
1) What happens when one of the CE-rbridge links fails? The draft doesn't 
talk about this scenario. I listed the possible solutions in my earlier 
email; are the authors planning to adopt one of them, or do they have 
another fix in mind? 

2) The solution doesn't work if the CE switches are interconnected, but 
this is but this is not documented in the draft. What happens if they get 
interconnected accidentally? What is the process for recovery? This needs 
to be discussed in the draft. 
More details here: 
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html 




From:        Erik Nordmark <nordmark@acm.org> 
To:        "trill@ietf.org" <trill@ietf.org> 
Date:        08/15/2012 03:14 PM 
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) 
for TRILL        - draft-ietf-trill-cmt-00 
Sent by:        trill-bounces@ietf.org 




We are trying to understand if this document is getting close to WG last 
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide 
comments.

Thanks,
   Erik and Donald
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill

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


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<font size=2 face="sans-serif">Are the authors of this draft planning
to respond to these comments at all? A protocol spec that doesn't talk
about what to do on link failure is incomplete, to say the least.</font>
<br>
<br>
<br>
<br><font size=1 color=#5f5f5f face="sans-serif">From: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">Sunny Rajagopalan/Santa
Clara/IBM@IBMUS</font>
<br><font size=1 color=#5f5f5f face="sans-serif">To: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">Erik Nordmark &lt;nordmark@acm.org&gt;</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Cc: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">trill-bounces@ietf.org,
&quot;trill@ietf.org&quot; &lt;trill@ietf.org&gt;</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Date: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">08/15/2012 03:28 PM</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Subject: &nbsp; &nbsp;
&nbsp; &nbsp;</font><font size=1 face="sans-serif">Re: [trill]
Any comments on Coordinated Multicast Trees (CMT) for TRILL &nbsp; &nbsp;
&nbsp; &nbsp;- draft-ietf-trill-cmt-00</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Sent by: &nbsp; &nbsp;
&nbsp; &nbsp;</font><font size=1 face="sans-serif">trill-bounces@ietf.org</font>
<br>
<hr noshade>
<br>
<br>
<br><font size=2 face="sans-serif">I had sent out comments on this a while
back, and none of them have been addressed.</font><font size=3> </font><font size=2 face="sans-serif"><br>
To summarize the issues:</font><font size=3> </font><font size=2 face="sans-serif"><br>
1) What happens when one of the CE-rbridge links fails? The draft doesn't
talk about this scenario. I listed the possible solutions in my earlier
email; are the authors planning to adopt one of them, or do they have another
fix in mind?</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
2) The solution doesn't work if the CE switches are interconnected, but
this is but this is not documented in the draft. What happens if they get
interconnected accidentally? What is the process for recovery? This needs
to be discussed in the draft.</font><font size=3> </font><font size=2 face="sans-serif"><br>
More details here:</font><font size=3> </font><font size=3 color=blue><u><br>
</u></font><a href="http://www.ietf.org/mail-archive/web/trill/current/msg04984.html"><font size=3 color=blue><u>http://www.ietf.org/mail-archive/web/trill/current/msg04984.html</u></font></a><font size=3>
<br>
<br>
<br>
<br>
</font><font size=1 color=#5f5f5f face="sans-serif"><br>
From: &nbsp; &nbsp; &nbsp; &nbsp;</font><font size=1 face="sans-serif">Erik
Nordmark &lt;nordmark@acm.org&gt;</font><font size=3> </font><font size=1 color=#5f5f5f face="sans-serif"><br>
To: &nbsp; &nbsp; &nbsp; &nbsp;</font><font size=1 face="sans-serif">&quot;trill@ietf.org&quot;
&lt;trill@ietf.org&gt;</font><font size=3> </font><font size=1 color=#5f5f5f face="sans-serif"><br>
Date: &nbsp; &nbsp; &nbsp; &nbsp;</font><font size=1 face="sans-serif">08/15/2012
03:14 PM</font><font size=3> </font><font size=1 color=#5f5f5f face="sans-serif"><br>
Subject: &nbsp; &nbsp; &nbsp; &nbsp;</font><font size=1 face="sans-serif">[trill]
Any comments on Coordinated Multicast Trees (CMT) for TRILL &nbsp; &nbsp;
&nbsp; &nbsp;- draft-ietf-trill-cmt-00</font><font size=3> </font><font size=1 color=#5f5f5f face="sans-serif"><br>
Sent by: &nbsp; &nbsp; &nbsp; &nbsp;</font><font size=1 face="sans-serif">trill-bounces@ietf.org</font><font size=3>
<br>
</font>
<hr noshade><font size=3><br>
<br>
</font><tt><font size=2><br>
<br>
We are trying to understand if this document is getting close to WG last
<br>
call, but we don't know how many have read the document.<br>
<br>
If you have reviewed the document, please let us know.<br>
If not, this might be a good time to review the document and provide <br>
comments.<br>
<br>
Thanks,<br>
 &nbsp; Erik and Donald<br>
_______________________________________________<br>
trill mailing list<br>
trill@ietf.org</font></tt><font size=3 color=blue><u><br>
</u></font><a href=https://www.ietf.org/mailman/listinfo/trill><tt><font size=2 color=blue><u>https://www.ietf.org/mailman/listinfo/trill</u></font></tt></a><tt><font size=2><br>
</font></tt><font size=3><br>
</font><tt><font size=2>_______________________________________________<br>
trill mailing list<br>
trill@ietf.org<br>
</font></tt><a href=https://www.ietf.org/mailman/listinfo/trill><tt><font size=2>https://www.ietf.org/mailman/listinfo/trill</font></tt></a><tt><font size=2><br>
</font></tt>
<br>
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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Hi Sunny,

I'm not an author but I'll respond further to your earlier mail.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com


On Fri, Aug 17, 2012 at 1:50 PM, Sunny Rajagopalan
<sunny.rajagopalan@us.ibm.com> wrote:
> Are the authors of this draft planning to respond to these comments at all?
> A protocol spec that doesn't talk about what to do on link failure is
> incomplete, to say the least.
>
>
>
> From:        Sunny Rajagopalan/Santa Clara/IBM@IBMUS
> To:        Erik Nordmark <nordmark@acm.org>
> Cc:        trill-bounces@ietf.org, "trill@ietf.org" <trill@ietf.org>
> Date:        08/15/2012 03:28 PM
> Subject:        Re: [trill] Any comments on Coordinated Multicast Trees
> (CMT) for TRILL        - draft-ietf-trill-cmt-00
> Sent by:        trill-bounces@ietf.org
> ________________________________
>
>
>
> I had sent out comments on this a while back, and none of them have been
> addressed.
> To summarize the issues:
> 1) What happens when one of the CE-rbridge links fails? The draft doesn't
> talk about this scenario. I listed the possible solutions in my earlier
> email; are the authors planning to adopt one of them, or do they have
> another fix in mind?
>
> 2) The solution doesn't work if the CE switches are interconnected, but this
> is but this is not documented in the draft. What happens if they get
> interconnected accidentally? What is the process for recovery? This needs to
> be discussed in the draft.
> More details here:
> http://www.ietf.org/mail-archive/web/trill/current/msg04984.html
>
>
>
>
> From:        Erik Nordmark <nordmark@acm.org>
> To:        "trill@ietf.org" <trill@ietf.org>
> Date:        08/15/2012 03:14 PM
> Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT)
> for TRILL        - draft-ietf-trill-cmt-00
> Sent by:        trill-bounces@ietf.org
> ________________________________
>
>
>
>
> We are trying to understand if this document is getting close to WG last
> call, but we don't know how many have read the document.
>
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide
> comments.
>
> Thanks,
>   Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
>
> _______________________________________________
> trill mailing list
> trill@ietf.org
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>
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From ghanwani@gmail.com  Fri Aug 17 15:50:36 2012
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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I would support the document going to WG last
call.  There are some obvious typos and some
things that need to be clarified (e.g. what is a
CE node), but that can be cleaned up as part
of the last call process.

Anoop

On Wed, Aug 15, 2012 at 3:11 PM, Erik Nordmark <nordmark@acm.org> wrote:
>
> We are trying to understand if this document is getting close to WG last
> call, but we don't know how many have read the document.
>
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide
> comments.
>
> Thanks,
>    Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill

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From mmani@force10networks.com  Sat Aug 18 07:01:57 2012
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To: Shivakumar Sundaram <shivakumar@force10networks.com>, "'anoop@alumni.duke.edu'" <anoop@alumni.duke.edu>, "'nordmark@acm.org'" <nordmark@acm.org>
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Have read the draft and support it for WG last call.

Thanks,
-Mani

-----Original Message-----
From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of S=
hivakumar Sundaram
Sent: Saturday, August 18, 2012 8:54 AM
To: 'anoop@alumni.duke.edu'; 'nordmark@acm.org'
Cc: 'trill@ietf.org'
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00

I have read the draft and I feel it solves an important problem of handling=
 active/active multihoming of traffic into the Trill fabric.  I support the=
 adoption of this draft for WG last call.
-
Thanks,
Shiva


----- Original Message -----
From: trill-bounces@ietf.org <trill-bounces@ietf.org>
To: Erik Nordmark <nordmark@acm.org>
Cc: trill@ietf.org <trill@ietf.org>
Sent: Sat Aug 18 04:20:34 2012
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for =
TRILL - draft-ietf-trill-cmt-00

I would support the document going to WG last call.  There are some obvious=
 typos and some things that need to be clarified (e.g. what is a CE node), =
but that can be cleaned up as part of the last call process.

Anoop

On Wed, Aug 15, 2012 at 3:11 PM, Erik Nordmark <nordmark@acm.org> wrote:
>
> We are trying to understand if this document is getting close to WG=20
> last call, but we don't know how many have read the document.
>
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide=20
> comments.
>
> Thanks,
>    Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sun, 19 Aug 2012 11:14:02 -0400
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To: "Tissa Senevirathne (tsenevir)" <tsenevir@cisco.com>
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Cc: Naveen Nimmu <naveen@broadcom.com>, "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] FW: New Version Notification for draft-tissa-trill-mt-encode-01.txt
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Hi Tissa,

On Fri, Jul 13, 2012 at 12:13 AM, Tissa Senevirathne (tsenevir)
<tsenevir@cisco.com> wrote:
> Hi Donald
>
> Please see my comments in-line
>
> -----Original Message-----
> From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of Donald Eastlake
> Sent: Thursday, July 12, 2012 8:26 AM
> To: Naveen Nimmu
> Cc: trill@ietf.org
> Subject: Re: [trill] FW: New Version Notification for draft-tissa-trill-mt-encode-01.txt
>
> A few comments:
>
> ...
>
> I'm not sure why there has to be an MT Capability bit. Wouldn't just not including the MT TLV be a good enough indication if you required even an MT capable RBridge only participating in base topology zero to include the MT TLV?
>
> [Answer] MT capability bit was added to identify the MT capability in the Hello message itself. However, we can discuss the use of the MT TLV for the purpose. I did not quite understand the inclusion of MT TLV in base topology question.

I believe the MT TLV can occur in Hellos as well as in LSP fragment
zero. It is optional in Hellos for Layer 3 IS-IS routers that only
support topology zero. I don't see why we couldn't require it to be
present in TRILL to indicate support of the proposed data plane
topology encoding.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

> ...
>
> Thanks,
> Donald
> =============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  155 Beaver Street, Milford, MA 01757 USA  d3e3e3@gmail.com
>
> On Mon, Jun 18, 2012 at 3:12 PM, Naveen Nimmu <naveen@broadcom.com> wrote:
>> A new version of this draft is posted. This version adds  proposed  extensions to support TRILL nickname space from 16bits to 24 bits.
>> Please review and provide feedback.
>> Thanks
>> \naveen
>>
>> -----Original Message-----
>> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
>> Sent: Monday, June 18, 2012 8:13 AM
>> To: tsenevir@cisco.com
>> Cc: aldrin.ietf@gmail.com; ginsberg@cisco.com; Naveen Nimmu;
>> ayabaner@gmail.com
>> Subject: New Version Notification for
>> draft-tissa-trill-mt-encode-01.txt
>>
>>
>> A new version of I-D, draft-tissa-trill-mt-encode-01.txt
>> has been successfully submitted by Tissa Senevirathne and posted to
>> the IETF repository.
>>
>> Filename:        draft-tissa-trill-mt-encode
>> Revision:        01
>> Title:           Multi Topology Encoding within TRILL data frames
>> Creation date:   2012-06-17
>> WG ID:           Individual Submission
>> Number of pages: 12
>> URL:             http://www.ietf.org/internet-drafts/draft-tissa-trill-mt-encode-01.txt
>> Status:          http://datatracker.ietf.org/doc/draft-tissa-trill-mt-encode
>> Htmlized:        http://tools.ietf.org/html/draft-tissa-trill-mt-encode-01
>> Diff:            http://tools.ietf.org/rfcdiff?url2=draft-tissa-trill-mt-encode-01
>>
>> Abstract:
>>    Two alternate methods of encoding Multi Topology Identifier within
>>    the TRILL data frames are presented. Methods proposed herein do not
>>    require overloading TRILL RBridge nickname to encode Multi Topology
>>    Identifier. A method that expands TRILL nickname space from 16bits
>>    to 24 bits is also presented in this draft.
>>
>>
>>
>>
>> The IETF Secretariat
>>
>> _______________________________________________
>> trill mailing list
>> trill@ietf.org
>> https://www.ietf.org/mailman/listinfo/trill
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sun, 19 Aug 2012 19:13:39 -0400
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Subject: [trill] Fwd: New Version Notification for draft-eastlake-isis-rfc6326bis-09.txt
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A new version of the rfc6326bis draft has been posted. The only
significant change from the previous version is to add basic
multi-topology support.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

---------- Forwarded message ----------
From:  <internet-drafts@ietf.org>
Date: Fri, Aug 17, 2012 at 10:47 PM
Subject: New Version Notification for draft-eastlake-isis-rfc6326bis-09.txt

A new version of I-D, draft-eastlake-isis-rfc6326bis-09.txt
has been successfully submitted by Donald Eastlake and posted to the
IETF repository.

Filename:        draft-eastlake-isis-rfc6326bis
Revision:        09
Title:           Transparent Interconnection of Lots of Links (TRILL)
Use of IS-IS
Creation date:   2012-08-16
WG ID:           Individual Submission
Number of pages: 49
URL:
http://www.ietf.org/internet-drafts/draft-eastlake-isis-rfc6326bis-09.txt
Status:          http://datatracker.ietf.org/doc/draft-eastlake-isis-rfc6326bis
Htmlized:        http://tools.ietf.org/html/draft-eastlake-isis-rfc6326bis-09
Diff:
http://www.ietf.org/rfcdiff?url2=draft-eastlake-isis-rfc6326bis-09

Abstract:
   The IETF TRILL (Transparent Interconnection of Lots of Links)
   protocol provides optimal pair-wise data frame forwarding without
   configuration in multi-hop networks with arbitrary topology and link
   technology, and support for multipathing of both unicast and
   multicast traffic. This document specifies the data formats and code
   points for the IS-IS extensions to support TRILL. These data formats
   and code points may also be used by technologies other than TRILL.
   This document obsoletes RFC 6326.

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From aldrin.ietf@gmail.com  Mon Aug 20 15:32:19 2012
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From: Sam Aldrin <aldrin.ietf@gmail.com>
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Date: Mon, 20 Aug 2012 15:32:17 -0700
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To: Erik Nordmark <nordmark@acm.org>
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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I reviewed this document and it fulfills the purpose it is written for.
Fully support the last call for this document.

-sam
On Aug 15, 2012, at 3:11 PM, Erik Nordmark <nordmark@acm.org> wrote:

>=20
> We are trying to understand if this document is getting close to WG =
last call, but we don't know how many have read the document.
>=20
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide =
comments.
>=20
> Thanks,
>   Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill


From zhangmingui@huawei.com  Mon Aug 20 19:45:57 2012
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From: Mingui Zhang <zhangmingui@huawei.com>
To: Erik Nordmark <nordmark@acm.org>, "trill@ietf.org" <trill@ietf.org>
Thread-Topic: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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I support the last call of this draft.

In order to be used as a complete solution, other issues (failure recovery,=
 mac sync, ...) with active-active multi-homing should also be addressed.=20

Thanks,
Mingui


> -----Original Message-----
> From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of=
 Erik
> Nordmark
> Sent: Thursday, August 16, 2012 6:12 AM
> To: trill@ietf.org
> Subject: [trill] Any comments on Coordinated Multicast Trees (CMT) for TR=
ILL -
> draft-ietf-trill-cmt-00
>=20
>=20
> We are trying to understand if this document is getting close to WG last
> call, but we don't know how many have read the document.
>=20
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide
> comments.
>=20
> Thanks,
>     Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill

From ramkumar@cisco.com  Wed Aug 22 08:34:49 2012
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From: "Ramkumar Parameswaran (ramkumar)" <ramkumar@cisco.com>
To: "trill@ietf.org" <trill@ietf.org>
Thread-Topic: Suggestion on RFC 6325 section 4.5.2, single parent ECMP link selection.
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--_000_CC5A4A253C56ramkumarciscocom_
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Hi,


With regard to the Parallel Link check in section 4.5.2 of RFC 6325, item 3=
 talks about how to select links in multi-destination trees when a node in =
a multi-destination tree has a single parent connected to it by multiple li=
nks. The section in the RFC identifies how to select a link in the bundle,o=
ver which all multi-destination traffic may traverse, when the links are of=
 type P2P or LAN links with pseudonode suppressed. Specifically, a single l=
ink is selected and traffic for all multi-destination trees is carried over=
 the selected link.



When a node is connected to a single parent across several LAN links which =
advertise a pseudonode (when pseudonode is not suppressed), RFC 6325 sectio=
n 4.5.1 already specifies a way to load balance multi-destination traffic a=
cross these links by pulling a unique link into each multi-destination tree=
.


This is illustrated in the following example


         |   Node B      | -> upstream, closer to tree root.

         -----------------

             /  |   | \

            |   |   |  |

            |01 02  |03|04

            |   |   |  |

             \  |   |  /

         -----------------

         |   Node A      |


Consider Node A and node B being connected to each other on 4 independent L=
AN links. Each of the four links above is a LAN link with a DRB elected and=
 pseudo-node advertised. The number to the right of the link identifies the=
 pseudo-node id operational on the link. In this situation, per 4.5.1, sinc=
e seven byte system id is considered in load-balancing links across trees, =
other factors holding, link 01 will be assigned to Tree 1, link 02

will be assigned to tree 2 and so on.


However, if the links were P2P links with 01, 02, 03, and 04 being the exte=
nded circuit id of the node with higher system id (B, say), then per 4.5.2,=
 link 04 would be pulled into all multi-destination trees, with no load-bal=
ancing on any of the other links.


For P2P links and pseudonode suppressed LAN links, we were wondering whethe=
r the following variant can be accommodated, so that multi-destination traf=
fic can be  spread over more links, with better link utilization:


Modified Approach: Once a dominant link-type is identified using the tie-br=
eak rule specified in item 3 (P2P or LAN link with suppressed pseudo node),=
 if there is more than one link of the dominant type, then such links are a=
rranged in ascending order of parent's Extended Circuit ID or Pseudonode ID=
,  given serial numbers starting with 0, and assigned to trees with a logic=
 similar to the multi-parent ECMP case:


Link on Tree T =3D (T-1) mod N where N is the number of parallel links


The parallel link check in section 4.5.2 must be modified to allow only the

adjacency that is selected for the tree that the packet arrived on.


No change in metric advertisement is needed with regard to the rest of the =
network, and in line with what is mentioned in 6325, the notion of mapping =
continues to remain local to the two adjacent nodes RB1-RB2.


Please let us know if the approach suggested above is feasible or if we may=
 have missed something.

Thanks,

Ramkumar

--_000_CC5A4A253C56ramkumarciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif; ">
<div>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">Hi,</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas"><br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">With re=
gard to the Parallel Link check in section 4.5.2 of RFC 6325, item 3 talks =
about how to select links in multi-destination trees when a node in a multi=
-destination tree has a single parent
 connected to it by multiple links. The section in the RFC identifies how t=
o select a link in the bundle,over which all multi-destination traffic may =
traverse, when the links are&nbsp;of type P2P or LAN links with pseudonode =
suppressed. Specifically, a&nbsp;single link
 is selected and traffic for all multi-destination trees is&nbsp;carried ov=
er the selected link.</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">When a =
node is connected to a single parent across several LAN links which adverti=
se a pseudonode (when pseudonode is not suppressed), RFC 6325 section 4.5.1=
 already specifies a way to load balance
 multi-destination traffic across these links by pulling a unique link into=
 each multi-destination tree.</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">This is=
 illustrated in the following example</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp; Node B&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;| -&gt; upstream, closer to tree root.&nbsp;</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -----------------</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /&nbsp;&n=
bsp;|&nbsp;&nbsp; | \</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|&nbsp;&nb=
sp; |&nbsp;&nbsp; |&nbsp;&nbsp;|</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|01 02&nbs=
p;&nbsp;|03|04</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|&nbsp;&nb=
sp; |&nbsp;&nbsp; |&nbsp;&nbsp;|</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \&nbsp;&n=
bsp;|&nbsp;&nbsp; |&nbsp;&nbsp;/</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -----------------</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp; Node A&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;|</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">Conside=
r Node A and node B being connected to each other on 4 independent LAN link=
s. Each of the four links above is a LAN link with a DRB elected and pseudo=
-node advertised. The number to the
 right of the link identifies the pseudo-node id operational on the link. I=
n this situation, per 4.5.1, since seven byte system id is considered in lo=
ad-balancing links across trees, other factors holding, link 01 will be ass=
igned to Tree 1, link 02</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">will be=
 assigned to tree 2 and so on.</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">However=
, if the links were P2P links with 01, 02, 03, and 04 being the extended ci=
rcuit id of the node with higher system id (B, say), then per 4.5.2, link 0=
4 would be pulled into all multi-destination
 trees, with no load-balancing on any of the other links.</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">For P2P=
 links and pseudonode suppressed LAN links, we were wondering whether the f=
ollowing variant can be accommodated, so that multi-destination traffic can=
 be&nbsp;&nbsp;spread over more links, with
 better link utilization:</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">Modifie=
d Approach: Once a dominant link-type is identified using the tie-break rul=
e specified in item 3 (P2P or LAN link with suppressed pseudo node), if the=
re is more than one link of the dominant
 type, then such links are arranged in ascending order of parent's Extended=
 Circuit ID or Pseudonode&nbsp;ID,&nbsp;&nbsp;given serial numbers starting=
 with 0, and assigned to trees with a&nbsp;logic similar to the multi-paren=
t ECMP case:</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">Link on=
 Tree T =3D (T-1) mod N where N is the number of parallel links</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">The par=
allel link check in section 4.5.2 must be modified to allow only the</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">adjacen=
cy that is selected for the tree that the packet arrived on.</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">No chan=
ge in metric advertisement is needed with regard to the rest of the network=
, and in line with what is mentioned in 6325, the notion of mapping continu=
es to remain local to the two adjacent
 nodes RB1-RB2.</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas; min-hei=
ght: 16.0px">
<br>
</p>
<p style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Consolas">Please =
let us know if the approach suggested above is feasible or if we may have m=
issed something.&nbsp;</p>
</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Ramkumar</div>
</body>
</html>

--_000_CC5A4A253C56ramkumarciscocom_--

From d3e3e3@gmail.com  Wed Aug 22 11:12:48 2012
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References: <CC5A4A25.3C56%ramkumar@cisco.com>
From: Donald Eastlake <d3e3e3@gmail.com>
Date: Wed, 22 Aug 2012 14:12:26 -0400
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To: "Ramkumar Parameswaran (ramkumar)" <ramkumar@cisco.com>
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Cc: "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] Suggestion on RFC 6325 section 4.5.2, single parent ECMP link selection.
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Hi Ramkumar,

On Wed, Aug 22, 2012 at 11:34 AM, Ramkumar Parameswaran (ramkumar)
<ramkumar@cisco.com> wrote:

> Hi,
>
> With regard to the Parallel Link check in section 4.5.2 of RFC 6325,
> item 3 talks about how to select links in multi-destination trees
> when a node in a multi-destination tree has a single parent
> connected to it by multiple links. The section in the RFC identifies
> how to select a link in the bundle, over which all multi-destination
> traffic may traverse, when the links are of type P2P or LAN links
> with pseudonode suppressed. Specifically, a single link is selected
> and traffic for all multi-destination trees is carried over the
> selected link.

Generally speaking, if the links are equal speed P2P Ethernet links, I
would recommend just aggregating them with 802.1AX, which resolves
these issues.

> When a node is connected to a single parent across several LAN links
> which advertise a pseudonode (when pseudonode is not suppressed),
> RFC 6325 section 4.5.1 already specifies a way to load balance
> multi-destination traffic across these links by pulling a unique
> link into each multi-destination tree.
>
> This is illustrated in the following example
>
>           |   Node B      | -> upstream, closer to tree root
>           -----------------
>              /  |   |  \
>             |   |   |   |
>             |01 02  |03 |04
>             |   |   |   |
>              \  |   |  /
>          -----------------
>          |   Node A      |
>

> Consider Node A and node B being connected to each other on 4
> independent LAN links. Each of the four links above is a LAN link
> with a DRB elected and pseudo-node advertised. The number to the
> right of the link identifies the pseudo-node id operational on the
> link. In this situation, per 4.5.1, since seven byte system id is
> considered in load-balancing links across trees, other factors
> holding, link 01 will be assigned to Tree 1, link 02 will be
> assigned to tree 2 and so on.
>
> However, if the links were P2P links with 01, 02, 03, and 04 being
> the extended circuit id of the node with higher system id (B, say),
> then per 4.5.2, link 04 would be pulled into all multi-destination
> trees, with no load-balancing on any of the other links.

This provision in RFC 6325 didn't come out of nowhere. It was
requested due, if I recall correctly, to limitation of some hardware
in implementing the Reverse Path Forwarding Check for
multi-destinaiton frames.

> For P2P links and pseudonode suppressed LAN links, we were wondering
> whether the following variant can be accommodated, so that
> multi-destination traffic can be spread over more links, with better
> link utilization:

When there are multiple parallel unlabeled links visible to TRILL
between two RBridges, this is reported to the campus as a single
adjacency. If the two RBridges can come to agreement, it is really a
private matter between them how those RBridges handle it. The
provisions in RFC 6325 are just a minimum to assure that the default
behavior will interoperate, taking into account the hardware
limitations that, at the time, indicated only one of such links could
be used for multi-destinaiton frames.

There are lots of possible optimizations that are left out so that
implementations have room to distinguish themselves. For example, the
sending RBridge gets to chose which of the unlabeled parallel links to
send unicast frames on. In doing so, it might want to avoid the link
chosen for multi-destination.

> Modified Approach: Once a dominant link-type is identified using the
> tie-break rule specified in item 3 (P2P or LAN link with suppressed
> pseudo node), if there is more than one link of the dominant type,
> then such links are arranged in ascending order of parent's Extended
> Circuit ID or Pseudonode ID, given serial numbers starting with 0,
> and assigned to trees with a logic similar to the multi-parent ECMP
> case:
>
> Link on Tree T = (T-1) mod N where N is the number of parallel links
>
> The parallel link check in section 4.5.2 must be modified to allow
> only the adjacency that is selected for the tree that the packet
> arrived on.

I don't see any particular problem with such a change if we could get
assurance that the previous reported hardware limitation was no longer
a factor. However, it is pretty hard to prove a negative. And if you
could, so different multi-destination frames could be sent over
different links of such a bundle of unlabeled links, then why have any
limiations at all? Just permit the sending RBridge to send over
whichever link its private hash algorithm and weighting indicate...

In fact, the capability of receiving multi-destination frames over any
link in such a unlabeled bundle could be advertised by a capability
bit, which would make such a relaxation of the Parallel Links Check
backwards compatible. If the capability was not signalled, you would
still have to do what is in RFC 6325. This seems like a reasonable way
to go to me.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

> No change in metric advertisement is needed with regard to the rest of the
> network, and in line with what is mentioned in 6325, the notion of mapping
> continues to remain local to the two adjacent nodes RB1-RB2.
>
> Please let us know if the approach suggested above is feasible or if we may
> have missed something.
>
> Thanks,
> Ramkumar

From ghanwani@gmail.com  Wed Aug 22 11:34:23 2012
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From: Anoop Ghanwani <anoop@alumni.duke.edu>
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Cc: "Ramkumar Parameswaran \(ramkumar\)" <ramkumar@cisco.com>, "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] Suggestion on RFC 6325 section 4.5.2, single parent ECMP link selection.
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On Wed, Aug 22, 2012 at 11:12 AM, Donald Eastlake <d3e3e3@gmail.com> wrote:
> Hi Ramkumar,
>
> On Wed, Aug 22, 2012 at 11:34 AM, Ramkumar Parameswaran (ramkumar)
> <ramkumar@cisco.com> wrote:

>
>> When a node is connected to a single parent across several LAN links
>> which advertise a pseudonode (when pseudonode is not suppressed),
>> RFC 6325 section 4.5.1 already specifies a way to load balance
>> multi-destination traffic across these links by pulling a unique
>> link into each multi-destination tree.
>>
>> This is illustrated in the following example
>>
>>           |   Node B      | -> upstream, closer to tree root
>>           -----------------
>>              /  |   |  \
>>             |   |   |   |
>>             |01 02  |03 |04
>>             |   |   |   |
>>              \  |   |  /
>>          -----------------
>>          |   Node A      |
>>
>
>> Consider Node A and node B being connected to each other on 4
>> independent LAN links. Each of the four links above is a LAN link
>> with a DRB elected and pseudo-node advertised. The number to the
>> right of the link identifies the pseudo-node id operational on the
>> link. In this situation, per 4.5.1, since seven byte system id is
>> considered in load-balancing links across trees, other factors
>> holding, link 01 will be assigned to Tree 1, link 02 will be
>> assigned to tree 2 and so on.
>>
>> However, if the links were P2P links with 01, 02, 03, and 04 being
>> the extended circuit id of the node with higher system id (B, say),
>> then per 4.5.2, link 04 would be pulled into all multi-destination
>> trees, with no load-balancing on any of the other links.
>
> This provision in RFC 6325 didn't come out of nowhere. It was
> requested due, if I recall correctly, to limitation of some hardware
> in implementing the Reverse Path Forwarding Check for
> multi-destinaiton frames.

I do remember discussions around this issue, but can't remember
exactly what it was...I think it might have had to do with trying
to use these links for ECMP within the same tree.

Anoop

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From: Yizhou Li <liyizhou@huawei.com>
To: 'Erik Nordmark' <nordmark@acm.org>, <trill@ietf.org>
References: <502C1EA0.7050305@acm.org>
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL	- draft-ietf-trill-cmt-00
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I have read the document and would support it going to WG last call.

Yizhou 

-----Original Message-----
From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of
Erik Nordmark
Sent: Thursday, August 16, 2012 6:12 AM
To: trill@ietf.org
Subject: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL
- draft-ietf-trill-cmt-00


We are trying to understand if this document is getting close to WG last 
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide 
comments.

Thanks,
    Erik and Donald
_______________________________________________
trill mailing list
trill@ietf.org
https://www.ietf.org/mailman/listinfo/trill


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From: "Ramkumar Parameswaran (ramkumar)" <ramkumar@cisco.com>
To: Donald Eastlake <d3e3e3@gmail.com>
Thread-Topic: [trill] Suggestion on RFC 6325 section 4.5.2, single parent ECMP link selection.
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Cc: "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] Suggestion on RFC 6325 section 4.5.2, single parent ECMP link selection.
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=0A=
=0A=
Hi Donald,=0A=
=0A=
Thanks for the consideration. One comment inline, tagged [**]:=0A=
________________________________________=0A=
From: trill-bounces@ietf.org [trill-bounces@ietf.org] on behalf of Donald E=
astlake [d3e3e3@gmail.com]=0A=
Sent: Wednesday, August 22, 2012 11:12 AM=0A=
To: Ramkumar Parameswaran (ramkumar)=0A=
Cc: trill@ietf.org=0A=
Subject: Re: [trill] Suggestion on RFC 6325 section 4.5.2, single parent EC=
MP link selection.=0A=
=0A=
Hi Ramkumar,=0A=
=0A=
On Wed, Aug 22, 2012 at 11:34 AM, Ramkumar Parameswaran (ramkumar)=0A=
<ramkumar@cisco.com> wrote:=0A=
=0A=
> Hi,=0A=
>=0A=
> With regard to the Parallel Link check in section 4.5.2 of RFC 6325,=0A=
> item 3 talks about how to select links in multi-destination trees=0A=
> when a node in a multi-destination tree has a single parent=0A=
> connected to it by multiple links. The section in the RFC identifies=0A=
> how to select a link in the bundle, over which all multi-destination=0A=
> traffic may traverse, when the links are of type P2P or LAN links=0A=
> with pseudonode suppressed. Specifically, a single link is selected=0A=
> and traffic for all multi-destination trees is carried over the=0A=
> selected link.=0A=
=0A=
Generally speaking, if the links are equal speed P2P Ethernet links, I=0A=
would recommend just aggregating them with 802.1AX, which resolves=0A=
these issues.=0A=
=0A=
> When a node is connected to a single parent across several LAN links=0A=
> which advertise a pseudonode (when pseudonode is not suppressed),=0A=
> RFC 6325 section 4.5.1 already specifies a way to load balance=0A=
> multi-destination traffic across these links by pulling a unique=0A=
> link into each multi-destination tree.=0A=
>=0A=
> This is illustrated in the following example=0A=
>=0A=
>           |   Node B      | -> upstream, closer to tree root=0A=
>           -----------------=0A=
>              /  |   |  \=0A=
>             |   |   |   |=0A=
>             |01 02  |03 |04=0A=
>             |   |   |   |=0A=
>              \  |   |  /=0A=
>          -----------------=0A=
>          |   Node A      |=0A=
>=0A=
=0A=
> Consider Node A and node B being connected to each other on 4=0A=
> independent LAN links. Each of the four links above is a LAN link=0A=
> with a DRB elected and pseudo-node advertised. The number to the=0A=
> right of the link identifies the pseudo-node id operational on the=0A=
> link. In this situation, per 4.5.1, since seven byte system id is=0A=
> considered in load-balancing links across trees, other factors=0A=
> holding, link 01 will be assigned to Tree 1, link 02 will be=0A=
> assigned to tree 2 and so on.=0A=
>=0A=
> However, if the links were P2P links with 01, 02, 03, and 04 being=0A=
> the extended circuit id of the node with higher system id (B, say),=0A=
> then per 4.5.2, link 04 would be pulled into all multi-destination=0A=
> trees, with no load-balancing on any of the other links.=0A=
=0A=
This provision in RFC 6325 didn't come out of nowhere. It was=0A=
requested due, if I recall correctly, to limitation of some hardware=0A=
in implementing the Reverse Path Forwarding Check for=0A=
multi-destinaiton frames.=0A=
=0A=
> For P2P links and pseudonode suppressed LAN links, we were wondering=0A=
> whether the following variant can be accommodated, so that=0A=
> multi-destination traffic can be spread over more links, with better=0A=
> link utilization:=0A=
=0A=
When there are multiple parallel unlabeled links visible to TRILL=0A=
between two RBridges, this is reported to the campus as a single=0A=
adjacency. If the two RBridges can come to agreement, it is really a=0A=
private matter between them how those RBridges handle it. The=0A=
provisions in RFC 6325 are just a minimum to assure that the default=0A=
behavior will interoperate, taking into account the hardware=0A=
limitations that, at the time, indicated only one of such links could=0A=
be used for multi-destinaiton frames.=0A=
=0A=
There are lots of possible optimizations that are left out so that=0A=
implementations have room to distinguish themselves. For example, the=0A=
sending RBridge gets to chose which of the unlabeled parallel links to=0A=
send unicast frames on. In doing so, it might want to avoid the link=0A=
chosen for multi-destination.=0A=
=0A=
> Modified Approach: Once a dominant link-type is identified using the=0A=
> tie-break rule specified in item 3 (P2P or LAN link with suppressed=0A=
> pseudo node), if there is more than one link of the dominant type,=0A=
> then such links are arranged in ascending order of parent's Extended=0A=
> Circuit ID or Pseudonode ID, given serial numbers starting with 0,=0A=
> and assigned to trees with a logic similar to the multi-parent ECMP=0A=
> case:=0A=
>=0A=
> Link on Tree T =3D (T-1) mod N where N is the number of parallel links=0A=
>=0A=
> The parallel link check in section 4.5.2 must be modified to allow=0A=
> only the adjacency that is selected for the tree that the packet=0A=
> arrived on.=0A=
=0A=
I don't see any particular problem with such a change if we could get=0A=
assurance that the previous reported hardware limitation was no longer=0A=
a factor. However, it is pretty hard to prove a negative. And if you=0A=
could, so different multi-destination frames could be sent over=0A=
different links of such a bundle of unlabeled links, then why have any=0A=
limiations at all? Just permit the sending RBridge to send over=0A=
whichever link its private hash algorithm and weighting indicate...=0A=
=0A=
[**]: Agree in general, but wanted to point out the following - =0A=
the unrestricted approach of sending on any link in the bundle (on a tree) =
may have issues with RPF  (Parallel link) check.  =0A=
Waiving the RPF check may not be a good option, for whatever reasons that R=
PF check exists in networks today. If the RPF check is =0A=
retained, the hardware may have to maintain a list of interfaces to cross c=
heck against and this would be expensive - Table space for a single interfa=
ce is probably the norm. =0A=
It may also dilute the check. Or, the load-distribution hash may need to be=
 applied on the receive side before the RPF check as well, again this may b=
e expensive in =0A=
hardware. =0A=
=0A=
When it was discussed in the past, were you considering multiple links in t=
he same tree, or one link per tree? =0A=
The approach we are suggesting needs only one RPF interface (per tree), and=
 makes the P2P and pseudo-node suppressed LAN cases =0A=
symmetric with the treatment of regular LAN.  Treating it as optional tied =
to a capability bit is fine. =0A=
=0A=
thanks,=0A=
=0A=
ramkumar =0A=
=0A=
=0A=
=0A=
In fact, the capability of receiving multi-destination frames over any=0A=
link in such a unlabeled bundle could be advertised by a capability=0A=
bit, which would make such a relaxation of the Parallel Links Check=0A=
backwards compatible. If the capability was not signalled, you would=0A=
still have to do what is in RFC 6325. This seems like a reasonable way=0A=
to go to me.=0A=
=0A=
Thanks,=0A=
Donald=0A=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=0A=
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)=0A=
 155 Beaver Street, Milford, MA 01757 USA=0A=
 d3e3e3@gmail.com=0A=
=0A=
> No change in metric advertisement is needed with regard to the rest of th=
e=0A=
> network, and in line with what is mentioned in 6325, the notion of mappin=
g=0A=
> continues to remain local to the two adjacent nodes RB1-RB2.=0A=
>=0A=
> Please let us know if the approach suggested above is feasible or if we m=
ay=0A=
> have missed something.=0A=
>=0A=
> Thanks,=0A=
> Ramkumar=0A=
_______________________________________________=0A=
trill mailing list=0A=
trill@ietf.org=0A=
https://www.ietf.org/mailman/listinfo/trill=0A=

From mohsin.sardar@seecs.edu.pk  Thu Aug 23 23:11:56 2012
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From: Muhammad Mohsin Sardar <mohsin.sardar@seecs.edu.pk>
Date: Fri, 24 Aug 2012 11:11:30 +0500
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Subject: [trill] Forwarding table for TRILL
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Hi,
As per my understanding from RFC6325 <http://tools.ietf.org/html/rfc6325> that
TRILL has two forwarding tables, one having the record of nicknames for
RBridges and other haveing the MAC addresses for end stations.
Intermediate RBridges only have nicknames table to forward encapsulated
packets.
Whereas ingress/egress RBridges have both nickname and MAC Address table.

Question:
Does ingress/egress RBridges need a forwarding table having the size equal
to number of end nodes(for MAC) + total RBridges(for Nickname)?

Thanks!

-- 
Best Regards,
Muhammad Mohsin Sardar

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<div class=3D"gmail_quote">Hi,<div>As per my understanding from <a href=3D"=
http://tools.ietf.org/html/rfc6325" target=3D"_blank">RFC6325</a>=A0that TR=
ILL has two forwarding tables, one having the record of nicknames for RBrid=
ges and other haveing the MAC addresses for end stations.</div>


<div>Intermediate RBridges only have nicknames table to forward encapsulate=
d packets.</div><div>Whereas ingress/egress RBridges have both nickname and=
 MAC Address table.</div><div><br></div><div>Question:</div><div>Does ingre=
ss/egress RBridges need a forwarding table having the size equal to number =
of end nodes(for MAC) + total RBridges(for Nickname)?</div>


<div><br></div><div>Thanks!</div><span class=3D"HOEnZb"><font color=3D"#888=
888"><div><br></div></font></span></div>-- <br>Best Regards,<br>Muhammad Mo=
hsin Sardar<br>

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From sujay.ietf@gmail.com  Fri Aug 24 03:31:35 2012
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Date: Fri, 24 Aug 2012 16:01:25 +0530
From: Sujay Gupta <sujay.ietf@gmail.com>
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Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00
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I support this draft.  Section 5.4.1 mentions use of tunneling or a 
passive mode, this does not make
things specific a either or, implementation will not inter-op.

Best Regards,
-Sujay

On 16-08-2012 03:41, Erik Nordmark wrote:
>
> We are trying to understand if this document is getting close to WG 
> last call, but we don't know how many have read the document.
>
> If you have reviewed the document, please let us know.
> If not, this might be a good time to review the document and provide 
> comments.
>
> Thanks,
>    Erik and Donald
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill


From d3e3e3@gmail.com  Fri Aug 24 05:59:05 2012
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Fri, 24 Aug 2012 08:58:44 -0400
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To: Muhammad Mohsin Sardar <mohsin.sardar@seecs.edu.pk>
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Subject: Re: [trill] Forwarding table for TRILL
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Hi Muhammad,

On Fri, Aug 24, 2012 at 2:11 AM, Muhammad Mohsin Sardar
<mohsin.sardar@seecs.edu.pk> wrote:
> Hi,
>
> As per my understanding from RFC6325 that TRILL has two forwarding
> tables, one having the record of nicknames for RBridges and other
> haveing the MAC addresses for end stations.
>
> Intermediate RBridges only have nicknames table to forward encapsulated
> packets.
>
> Whereas ingress/egress RBridges have both nickname and MAC Address table.

An implementer can structure their tables however they want as long as
the bits on the wire and the external behavior is the same; however,
having two tables as you describe, one used by the native frame
ingress/egress function and one used by the TRILL Data forwarding
function is a reasonable way to look at it.

> Question:
> Does ingress/egress RBridges need a forwarding table having the size
> equal to number of end nodes(for MAC) + total RBridges(for
> Nickname)?

Sort of.

The ingress lookup is by VLAN+MAC to get an egress nickname (or find
that it is not in the table) while the egress lookup is by VLAN+MAC to
get a port (or find that it is not in the table). There is, of course,
no requirement that the ingress/egress table(s) be exactly "equal" to
the number of end station in the set of VLANs that the RBridge is
interested in and that is probably almost never true.

On the other hand, there is a requirement that an RBridge be able to
hold the link state which includes the nicknames of all other RBridges
(otherwise it is in overflow, see draft-ietf-trill-clear-correct) and
be able to look up the egress nickname from a TRILL Data frame to
determine which port (unicast) or ports (multi-destinaiton) to forward
the TRILL Data frame out of.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

> Thanks!
>
> --
> Best Regards,
> Muhammad Mohsin Sardar

From mohsin.sardar@seecs.edu.pk  Fri Aug 24 10:20:00 2012
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From: Muhammad Mohsin Sardar <mohsin.sardar@seecs.edu.pk>
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Subject: Re: [trill] Forwarding table for TRILL
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Hi Donald,
Thanks for reply!
Please clarify inline question.

On Fri, Aug 24, 2012 at 5:58 PM, Donald Eastlake <d3e3e3@gmail.com> wrote:

> Hi Muhammad,
>
> On Fri, Aug 24, 2012 at 2:11 AM, Muhammad Mohsin Sardar
> <mohsin.sardar@seecs.edu.pk> wrote:
> > Hi,
> >
> > As per my understanding from RFC6325 that TRILL has two forwarding
> > tables, one having the record of nicknames for RBridges and other
> > haveing the MAC addresses for end stations.
> >
> > Intermediate RBridges only have nicknames table to forward encapsulated
> > packets.
> >
> > Whereas ingress/egress RBridges have both nickname and MAC Address table.
>
> An implementer can structure their tables however they want as long as
> the bits on the wire and the external behavior is the same; however,
> having two tables as you describe, one used by the native frame
> ingress/egress function and one used by the TRILL Data forwarding
> function is a reasonable way to look at it.
>
> > Question:
> > Does ingress/egress RBridges need a forwarding table having the size
> > equal to number of end nodes(for MAC) + total RBridges(for
> > Nickname)?
>
> Sort of.
>
> The ingress lookup is by VLAN+MAC to get an egress nickname (or find
> that it is not in the table) while the egress lookup is by VLAN+MAC to
> get a port (or find that it is not in the table). There is, of course,
> no requirement that the ingress/egress table(s) be exactly "equal" to
> the number of end station in the set of VLANs that the RBridge is
> interested in and that is probably almost never true.
>
Do we need ingress/egress table(s) nearly "equal" to the number of end
stations?
If we need MAC to nickname mapping for all end stations, Do we need a table
size nearly equal to the number of end stations?
Therefore, a larger ingress/egress table is required in case of data center
networks of hundred thousand end servers.

>
> On the other hand, there is a requirement that an RBridge be able to
> hold the link state which includes the nicknames of all other RBridges
> (otherwise it is in overflow, see draft-ietf-trill-clear-correct) and
> be able to look up the egress nickname from a TRILL Data frame to
> determine which port (unicast) or ports (multi-destinaiton) to forward
> the TRILL Data frame out of.
>
> Thanks,
> Donald
> =============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  155 Beaver Street, Milford, MA 01757 USA
>  d3e3e3@gmail.com
>
> > Thanks!
> >
> > --
> > Best Regards,
> > Muhammad Mohsin Sardar
>



-- 
Best Regards,
Muhammad Mohsin Sardar

--047d7b34352667a4ba04c8062f38
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Hi Donald,<div>Thanks for reply!</div><div>Please clarify inline question.<=
br><br><div class=3D"gmail_quote">On Fri, Aug 24, 2012 at 5:58 PM, Donald E=
astlake <span dir=3D"ltr">&lt;<a href=3D"mailto:d3e3e3@gmail.com" target=3D=
"_blank">d3e3e3@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi Muhammad,<br>
<div class=3D"im"><br>
On Fri, Aug 24, 2012 at 2:11 AM, Muhammad Mohsin Sardar<br>
&lt;<a href=3D"mailto:mohsin.sardar@seecs.edu.pk">mohsin.sardar@seecs.edu.p=
k</a>&gt; wrote:<br>
&gt; Hi,<br>
&gt;<br>
&gt; As per my understanding from RFC6325 that TRILL has two forwarding<br>
&gt; tables, one having the record of nicknames for RBridges and other<br>
&gt; haveing the MAC addresses for end stations.<br>
&gt;<br>
&gt; Intermediate RBridges only have nicknames table to forward encapsulate=
d<br>
&gt; packets.<br>
&gt;<br>
&gt; Whereas ingress/egress RBridges have both nickname and MAC Address tab=
le.<br>
<br>
</div>An implementer can structure their tables however they want as long a=
s<br>
the bits on the wire and the external behavior is the same; however,<br>
having two tables as you describe, one used by the native frame<br>
ingress/egress function and one used by the TRILL Data forwarding<br>
function is a reasonable way to look at it.<br>
<div class=3D"im"><br>
&gt; Question:<br>
&gt; Does ingress/egress RBridges need a forwarding table having the size<b=
r>
&gt; equal to number of end nodes(for MAC) + total RBridges(for<br>
&gt; Nickname)?<br>
<br>
</div>Sort of.<br>
<br>
The ingress lookup is by VLAN+MAC to get an egress nickname (or find<br>
that it is not in the table) while the egress lookup is by VLAN+MAC to<br>
get a port (or find that it is not in the table). There is, of course,<br>
no requirement that the ingress/egress table(s) be exactly &quot;equal&quot=
; to<br>
the number of end station in the set of VLANs that the RBridge is<br>
interested in and that is probably almost never true.<br></blockquote><div>=
Do we need ingress/egress table(s) nearly &quot;equal&quot; to the number o=
f end stations?=A0</div><div>If we need MAC to nickname mapping for all end=
 stations, Do we need a table size nearly equal to the number of end statio=
ns?=A0</div>

<div>Therefore, a larger ingress/egress table is required in case of data c=
enter networks of hundred thousand end servers.</div><blockquote class=3D"g=
mail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-l=
eft:1ex">


<br>
On the other hand, there is a requirement that an RBridge be able to<br>
hold the link state which includes the nicknames of all other RBridges<br>
(otherwise it is in overflow, see draft-ietf-trill-clear-correct) and<br>
be able to look up the egress nickname from a TRILL Data frame to<br>
determine which port (unicast) or ports (multi-destinaiton) to forward<br>
the TRILL Data frame out of.<br>
<br>
Thanks,<br>
Donald<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D<br>
=A0Donald E. Eastlake 3rd =A0 <a href=3D"tel:%2B1-508-333-2270" value=3D"+1=
5083332270">+1-508-333-2270</a> (cell)<br>
=A0155 Beaver Street, Milford, MA 01757 USA<br>
=A0<a href=3D"mailto:d3e3e3@gmail.com">d3e3e3@gmail.com</a><br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
&gt; Thanks!<br>
&gt;<br>
&gt; --<br>
&gt; Best Regards,<br>
&gt; Muhammad Mohsin Sardar<br>
</div></div></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>=
Best Regards,<br>Muhammad Mohsin Sardar<br>
</div>

--047d7b34352667a4ba04c8062f38--

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Fri, 24 Aug 2012 15:34:35 -0400
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To: "Ramkumar Parameswaran (ramkumar)" <ramkumar@cisco.com>
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Subject: Re: [trill] Suggestion on RFC 6325 section 4.5.2, single parent ECMP link selection.
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Hi Ramkumar,

On Thu, Aug 23, 2012 at 10:43 PM, Ramkumar Parameswaran (ramkumar)
<ramkumar@cisco.com> wrote:
>
> Hi Donald,
>
> Thanks for the consideration. One comment inline, tagged [**]:
> ________________________________________
>> From: trill-bounces@ietf.org [trill-bounces@ietf.org] on behalf of
  Donald Eastlake [d3e3e3@gmail.com]
>> Sent: Wednesday, August 22, 2012 11:12 AM
>> To: Ramkumar Parameswaran (ramkumar)
>> Cc: trill@ietf.org
>> Subject: Re: [trill] Suggestion on RFC 6325 section 4.5.2, single
  parent ECMP link selection.
>>
>> Hi Ramkumar,
>>
>> On Wed, Aug 22, 2012 at 11:34 AM, Ramkumar Parameswaran (ramkumar)
>> <ramkumar@cisco.com> wrote:
>>
>>> Hi,
>>>
>>> ...
>>
>>> For P2P links and pseudonode suppressed LAN links, we were wondering
>>> whether the following variant can be accommodated, so that
>>> multi-destination traffic can be spread over more links, with better
>>> link utilization:
>>
>> When there are multiple parallel unlabeled links visible to TRILL
>> between two RBridges, this is reported to the campus as a single
>> adjacency. If the two RBridges can come to agreement, it is really a
>> private matter between them how those RBridges handle it. The
>> provisions in RFC 6325 are just a minimum to assure that the default
>> behavior will interoperate, taking into account the hardware
>> limitations that, at the time, indicated only one of such links could
>> be used for multi-destinaiton frames.
>>
>> There are lots of possible optimizations that are left out so that
>> implementations have room to distinguish themselves. For example, the
>> sending RBridge gets to chose which of the unlabeled parallel links to
>> send unicast frames on. In doing so, it might want to avoid the link
>> chosen for multi-destination.
>>
>>> Modified Approach: Once a dominant link-type is identified using the
>>> tie-break rule specified in item 3 (P2P or LAN link with suppressed
>>> pseudo node), if there is more than one link of the dominant type,
>>> then such links are arranged in ascending order of parent's Extended
>>> Circuit ID or Pseudonode ID, given serial numbers starting with 0,
>>> and assigned to trees with a logic similar to the multi-parent ECMP
>>> case:
>>>
>>> Link on Tree T = (T-1) mod N where N is the number of parallel links
>>>
>>> The parallel link check in section 4.5.2 must be modified to allow
>>> only the adjacency that is selected for the tree that the packet
>>> arrived on.
>>
>> I don't see any particular problem with such a change if we could get
>> assurance that the previous reported hardware limitation was no longer
>> a factor. However, it is pretty hard to prove a negative. And if you
>> could, so different multi-destination frames could be sent over
>> different links of such a bundle of unlabeled links, then why have any
>> limiations at all? Just permit the sending RBridge to send over
>> whichever link its private hash algorithm and weighting indicate...
>>

> [**]: Agree in general, but wanted to point out the following -
> the unrestricted approach of sending on any link in the bundle (on a
> tree) may have issues with RPF (Parallel link) check.  Waiving the
> RPF check may not be a good option, for whatever reasons that RPF
> check exists in networks today. If the RPF check is retained, the
> hardware may have to maintain a list of interfaces to cross check
> against and this would be expensive - Table space for a single
> interface is probably the norm.  It may also dilute the check. Or,
> the load-distribution hash may need to be applied on the receive
> side before the RPF check as well, again this may be expensive in
> hardware.

I think you have re-discovered the reason for the current provisions
in the specification. Of course, if the RPF check used a pseudo port
number which was the same for all ports in such a TRILL port group,
then it would not take any more RPF table space... So this sort of
thing is critically dependent on just how the fast path hardware is
implemented.

> When it was discussed in the past, were you considering multiple
> links in the same tree, or one link per tree?

I don't remember. You can go back and look in the mail archives if you
want.

>  The approach we are suggesting needs only one RPF interface (per
> tree), and makes the P2P and pseudo-node suppressed LAN cases
> symmetric with the treatment of regular LAN.  Treating it as
> optional tied to a capability bit is fine.

I think in practice this situation would usually be solved by either
using link aggregation or, for LAN links, by enabling pseudo-nodes on
the parallel links. (With pseudo-nodes, you would typically get ECMP
between the fastest links for unicast and different trees on different
ones of the fastest links for multi-destination, with slower links
ignored.) Furthermore, if both RBridges want to cooperate (like they
are from the same manufacturer or something), they can do whatever
fancy thing they want.

As I said, the current provisions are to get something that will
operate and interoperate correctly if such a configuration actually
occurs. Is it worth the complexity to have additional logic, a
configuration bit, etc., to make it somewhat better?

In fact, you would need additional suggestions or provisions to really
improve things for a wide variety of conditions. For example, what
should you do if there are four unlabeled links between RB1 and RB2
that are 10Meg, 100Meg, 1Gig, and 10Gig bits per second repsectively?
Auto-configuration can only get you so far before it becomes
unreasonably complex and, to get the best performance, you need
configuration. For example, one factor in such configuration might be
what percentage of traffic overall is multi-destiation, something it
would be a pain for TRILL to figure out.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

>> thanks,
>> ramkumar
>>
>>
>> In fact, the capability of receiving multi-destination frames over any
>> link in such a unlabeled bundle could be advertised by a capability
>> bit, which would make such a relaxation of the Parallel Links Check
>> backwards compatible. If the capability was not signalled, you would
>> still have to do what is in RFC 6325. This seems like a reasonable way
>> to go to me.
>>
>> Thanks,
>> Donald
>> =============================
>>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>>  155 Beaver Street, Milford, MA 01757 USA
>>  d3e3e3@gmail.com
>>
>>> No change in metric advertisement is needed with regard to the rest of the
>>> network, and in line with what is mentioned in 6325, the notion of mapping
>>> continues to remain local to the two adjacent nodes RB1-RB2.
>>>
>>> Please let us know if the approach suggested above is feasible or if we may
>>> have missed something.
>>>
>>> Thanks,
>>> Ramkumar

From touch@isi.edu  Fri Aug 24 13:24:25 2012
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Subject: Re: [trill] Forwarding table for TRILL
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Hi, Muhammed,

On 8/23/2012 11:11 PM, Muhammad Mohsin Sardar wrote:
...
> Does ingress/egress RBridges need a forwarding table having the size
> equal to number of end nodes(for MAC) + total RBridges(for Nickname)?

As an upper-bound, yes. However, just as this information is collected 
over time, the "working set" of it can be cached, and so an 
implementation may have less capacity in either table and still be useful.

Joe

From internet-drafts@ietf.org  Fri Aug 24 14:32:43 2012
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Subject: [trill] I-D Action: draft-ietf-trill-oam-req-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Transparent Interconnection of Lots of Li=
nks Working Group of the IETF.

	Title           : Requirements for Operations, Administration and Maintena=
nce (OAM) in TRILL
	Author(s)       : Tissa Senevirathne
                          David Bond
                          Sam Aldrin
                          Yizhou Li
                          Rohit Watve
                          Anoop Ghanwani
                          Naveen Nimmu
                          Radia Perlman
                          Tal Mizrahi
	Filename        : draft-ietf-trill-oam-req-01.txt
	Pages           : 14
	Date            : 2012-08-24

Abstract:
   OAM (Operations, Administration and Maintenance) is a general term
   used to identify functions and toolsets to troubleshoot and monitor
   networks. This document presents, OAM Requirements applicable to
   TRILL.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-trill-oam-req

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-trill-oam-req-01

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-trill-oam-req-01


Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nkzouwenyu@gmail.com  Fri Aug 24 18:19:29 2012
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From: wenyu zou <nkzouwenyu@gmail.com>
To: trill@ietf.org
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Subject: [trill] Query on Interested VLANsand Spanning Tree Roots Sub-TLV in RFC6326
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Hi Authors,
    I have a question about "AppointedForwarder Status Lost Counter"
in"Interested VLANs and Spanning Tree Roots Sub-TLV", as specified in
[RFC6326], Section 2.3.6. The counter is shared by VLANs from
VLAN.start toVLAN.end. But the counter for per-VLAN can easily be
different by configuration or topology change. When a port lost the
status of being an appointed forwarder for VLANx, the Sub-TLV should
be splited. So it maybe have so many Interested VLANs and Spanning
Tree Roots Sub-TLV in LSPs, and they have little chance to merge
again.
    Is it correct? Do you have some method to solve this problem?
Thanks.
Regards,
wenyu

From d3e3e3@gmail.com  Fri Aug 24 19:48:47 2012
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Fri, 24 Aug 2012 22:48:20 -0400
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To: wenyu zou <nkzouwenyu@gmail.com>
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Cc: trill@ietf.org
Subject: Re: [trill] Query on Interested VLANsand Spanning Tree Roots Sub-TLV in RFC6326
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Hi Wenyu,

On Fri, Aug 24, 2012 at 9:19 PM, wenyu zou <nkzouwenyu@gmail.com> wrote:
> Hi Authors,
>     I have a question about "AppointedForwarder Status Lost Counter"
> in"Interested VLANs and Spanning Tree Roots Sub-TLV", as specified in
> [RFC6326], Section 2.3.6. The counter is shared by VLANs from
> VLAN.start toVLAN.end. But the counter for per-VLAN can easily be
> different by configuration or topology change. When a port lost the
> status of being an appointed forwarder for VLANx, the Sub-TLV should
> be splited. So it maybe have so many Interested VLANs and Spanning
> Tree Roots Sub-TLV in LSPs, and they have little chance to merge
> again.
>     Is it correct? Do you have some method to solve this problem?

The Appointed Forwarder Status Lost Counter is a mechanism to optimize
data plane learning by trimming the expiration timer for learned
addresses per VLAN under some circumstances.
(1) If you don't care about that optimization and don't mind some time
outs being longer than they otherwise would be, you can just not
bother changing the counter, even if you are using data plane
learning. On the other hand, if you don't care about sone time outs
being shortened when they otherwise wouldn't, you could increment the
counter for multiple VLANs even you don't lose AF status on a port for
all those VLANS.
(2) If you are using ESADI or Directory Assist and not learning from
the data plane, the counter doesn't matter and there really isn't any
reason to increment it.
(3) If an RBridge port has been configured with the "disable end
station traffic" bit on (also known as the trunk bit), then it makes
no difference if that port is appointed forwarder or not. So there is
no reason to increment the counter if such a port loses Appointed
Forwarder status.
(4) If you are updating the counter, incrementing it by more than one
(even up to incrementing it by a couple of hundred), so that it
matches the counter for some other VLAN for the same RBridge would
have an extremely small probability of causing any sub-optimization
and if it did will just very rarely fail to specially decrease the
time out for some learned addresses.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

> Thanks.
> Regards,
> wenyu

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From: Haoweiguo <haoweiguo@huawei.com>
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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">As noted by Hongjun, This=
 draft provide a unified framework in solving LAN edge connectivity in TRIL=
L. It utilizes CMT concepts when solving active-active multi
 homed edge.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">CMT draft in itself is pr=
oviding a flexible framework in deriving RPF. There are many applications t=
hat can utilize the CMT concepts. E.g of such applications
 are Resilient Multicast trees, active-active edge, Multicast TE, etc. The =
&nbsp;CMT draft will remain focused on the framework and &nbsp;application =
of different solutions will be discussed in related documents.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">In that light, &nbsp;draf=
t-hu-trill-pseudonode-nickname-03.txt, discuss how CMT concepts are applied=
 to active-active LAN edge also it provide a unified solution
 for TRILL LAN edge and &nbsp;hence is the best place to discuss<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><span style=3D"mso-=
list:Ignore">1.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Edge failure scen=
arios<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><span style=3D"mso-=
list:Ignore">2.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Miss configuratio=
ns<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><span style=3D"mso-=
list:Ignore">3.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Receipt of TRILL =
encap packets on LAN edge
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><span style=3D"mso-=
list:Ignore">4.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Or please bring i=
t on any other you may think<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Appreciate very much if y=
ou can review and provide us comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thanks<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Tissa and Hongjun.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> trill-bo=
unces@ietf.org [mailto:trill-bounces@ietf.org]
<b>On Behalf Of </b>zhai.hongjun@zte.com.cn<br>
<b>Sent:</b> Sunday, August 26, 2012 7:28 PM<br>
<b>To:</b> trill@ietf.org<br>
<b>Subject:</b> [trill] FWD: New Version Notification for draft-hu-trill-ps=
eudonode-nickname-03.txt<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">Hi Folks,</span> <br>
<br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">A new version of draft-hu-trill-pseudonode-nickname has been pos=
ted. The concept of Virtual RBridge (RBv), along with its pseudo-nickname, =
is dicussed in this draft. And a unified framework is
 provided to allows RBv to be used both in shared LAN and point-piont scena=
rios at the edge of TRILL campus. Then the member Rbridges in a RBv can pro=
vide active-active load balancing to their connected end nodes in a same VL=
AN.</span>
<br>
<br>
<span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-se=
rif&quot;">Please review it and let us know your comments.<br>
<br>
Thanks,<br>
Zhai Hongjun<br>
&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&qu=
ot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;=
&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&qu=
ot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;=
&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&qu=
ot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;<br>
Protocol Development Dept.VI, Central R&amp;D Institute, ZTE Corporation<br=
>
No. 68, Zijinghua Road, Yuhuatai District, Nanjing, P.R.China, 210012<br>
<br>
Zhai Hongjun<br>
<br>
Tel: &#43;86-25-52877345<br>
Email: <a href=3D"mailto:zhai.hongjun@zte.com.cn">zhai.hongjun@zte.com.cn</=
a><br>
&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&qu=
ot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;=
&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&qu=
ot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;=
&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&qu=
ot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;<br>
<br>
</span><br>
<span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-ser=
if&quot;;color:purple">-----
</span><span lang=3D"ZH-CN" style=3D"font-size:7.5pt;color:purple">=D7=AA=
=B7=A2=C8=CB</span><span lang=3D"ZH-CN" style=3D"font-size:7.5pt;font-famil=
y:&quot;Arial&quot;,&quot;sans-serif&quot;;color:purple">
</span><span lang=3D"ZH-CN" style=3D"font-size:7.5pt;color:purple">=B5=D4=
=BA=E9=BE=FC</span><span style=3D"font-size:7.5pt;font-family:&quot;Arial&q=
uot;,&quot;sans-serif&quot;;color:purple">129567/user/zte_ltd
</span><span lang=3D"ZH-CN" style=3D"font-size:7.5pt;color:purple">=CA=B1=
=BC=E4</span><span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&=
quot;sans-serif&quot;;color:purple"> 2012-08-27 09:56 -----</span>
<o:p></o:p></p>
<table class=3D"MsoNormalTable" border=3D"0" cellpadding=3D"0" width=3D"100=
%" style=3D"width:100.0%">
<tbody>
<tr>
<td width=3D"36%" valign=3D"top" style=3D"width:36.0%;padding:.75pt .75pt .=
75pt .75pt">
<p class=3D"MsoNormal"><b><span style=3D"font-size:7.5pt;font-family:&quot;=
Arial&quot;,&quot;sans-serif&quot;"><a href=3D"mailto:internet-drafts@ietf.=
org">internet-drafts@ietf.org</a></span></b><span style=3D"font-size:7.5pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">
</span><o:p></o:p></p>
<p><span style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-=
serif&quot;">2012-08-27 09:53</span>
<o:p></o:p></p>
</td>
<td width=3D"63%" valign=3D"top" style=3D"width:63.0%;padding:.75pt .75pt .=
75pt .75pt">
<table class=3D"MsoNormalTable" border=3D"0" cellpadding=3D"0" width=3D"100=
%" style=3D"width:100.0%">
<tbody>
<tr>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt">
<p class=3D"MsoNormal" align=3D"right" style=3D"text-align:right"><span lan=
g=3D"ZH-CN" style=3D"font-size:7.5pt">=CA=D5=BC=FE=C8=CB</span><o:p></o:p><=
/p>
</td>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt">
<p class=3D"MsoNormal"><span style=3D"font-size:7.5pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;"><a href=3D"mailto:zhai.hongjun@zte.com.cn"=
>zhai.hongjun@zte.com.cn</a></span>
<o:p></o:p></p>
</td>
</tr>
<tr>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt">
<p class=3D"MsoNormal" align=3D"right" style=3D"text-align:right"><span lan=
g=3D"ZH-CN" style=3D"font-size:7.5pt">=B3=AD=CB=CD</span><o:p></o:p></p>
</td>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt">
<p class=3D"MsoNormal"><span style=3D"font-size:7.5pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;"><a href=3D"mailto:tsenevir@cisco.com">tsen=
evir@cisco.com</a>,
<a href=3D"mailto:d3e3e3@gmail.com">d3e3e3@gmail.com</a>, <a href=3D"mailto=
:radia@alum.mit.edu">
radia@alum.mit.edu</a>, <a href=3D"mailto:hu.fangwei@zte.com.cn">hu.fangwei=
@zte.com.cn</a>,
<a href=3D"mailto:zhangmingui@huawei.com">zhangmingui@huawei.com</a></span>=
 <o:p></o:p></p>
</td>
</tr>
<tr>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt">
<p class=3D"MsoNormal" align=3D"right" style=3D"text-align:right"><span lan=
g=3D"ZH-CN" style=3D"font-size:7.5pt">=D6=F7=CC=E2</span><o:p></o:p></p>
</td>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt">
<p class=3D"MsoNormal"><span style=3D"font-size:7.5pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">New Version Notification for draft-hu-tril=
l-pseudonode-nickname-03.txt</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<table class=3D"MsoNormalTable" border=3D"0" cellpadding=3D"0">
<tbody>
<tr>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt"></td>
<td valign=3D"top" style=3D"padding:.75pt .75pt .75pt .75pt"></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
<br>
<br>
<span style=3D"font-size:10.0pt"><br>
<tt>A new version of I-D, draft-hu-trill-pseudonode-nickname-03.txt</tt><br=
>
<tt>has been successfully submitted by Hongjun Zhai and posted to the</tt><=
br>
<tt>IETF repository.</tt><br>
<br>
<tt>Filename: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
;draft-hu-trill-pseudonode-nickname</tt><br>
<tt>Revision: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
;03</tt><br>
<tt>Title: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &=
nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; RBridge: Pseudo-Nick=
name</tt><br>
<tt>Creation date: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;2012-08-26</tt><br>
<tt>WG ID: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &=
nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Individual Submissio=
n</tt><br>
<tt>Number of pages: 16</tt><br>
<tt>URL: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href=3D"http://www.ie=
tf.org/internet-drafts/draft-hu-trill-pseudonode-nickname-03.txt">
http://www.ietf.org/internet-drafts/draft-hu-trill-pseudonode-nickname-03.t=
xt</a></tt><br>
<tt>Status: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<a href=3D"http://datatracker=
.ietf.org/doc/draft-hu-trill-pseudonode-nickname">http://datatracker.ietf.o=
rg/doc/draft-hu-trill-pseudonode-nickname</a></tt><br>
<tt>Htmlized: &nbsp; &nbsp; &nbsp; &nbsp;<a href=3D"http://tools.ietf.org/h=
tml/draft-hu-trill-pseudonode-nickname-03">http://tools.ietf.org/html/draft=
-hu-trill-pseudonode-nickname-03</a></tt><br>
<tt>Diff: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<a href=3D"http://www.ie=
tf.org/rfcdiff?url2=3Ddraft-hu-trill-pseudonode-nickname-03">http://www.iet=
f.org/rfcdiff?url2=3Ddraft-hu-trill-pseudonode-nickname-03</a></tt><br>
<br>
<tt>Abstract:</tt><br>
<tt>&nbsp; At the edg of TRILL campus, some RBridges provide end-station</t=
t><br>
<tt>&nbsp; services to their attached end stations; these RBridges are call=
ed</tt><br>
<tt>&nbsp; edge RBridges. &nbsp;To avoid potential frame duplication or loo=
ps in</tt><br>
<tt>&nbsp; TRILL campus, only one edge RBridge is permitted to provide such=
</tt><br>
<tt>&nbsp; services in a VLAN at all times to its attached end stations eve=
n</tt><br>
<tt>&nbsp; they are also attached to other edge RBridges. &nbsp;However, in=
 some</tt><br>
<tt>&nbsp; application scenarios, for example in Link Aggregation Group (LA=
G),</tt><br>
<tt>&nbsp; more than one edge RBridge is required to provide such services =
to an</tt><br>
<tt>&nbsp; end station even in a VLAN to improve resiliency and maximize th=
e</tt><br>
<tt>&nbsp; available network bandwidth, which causes the flip-flopping of t=
he</tt><br>
<tt>&nbsp; egress RBridge nickname for such an end station in remote RBridg=
es'</tt><br>
<tt>&nbsp; forwarding tables. &nbsp;In this document, the concept of Virtua=
l RBridge,</tt><br>
<tt>&nbsp; along with its pseudo-nickname, is introduced to address the abo=
ve</tt><br>
<tt>&nbsp; problem.</tt><br>
<br>
<tt>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &=
nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbs=
p; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</tt><br>
<br>
<br>
<tt>The IETF Secretariat</tt><br>
<br>
</span><o:p></o:p></p>
</div>
</body>
</html>

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From d3e3e3@gmail.com  Thu Aug 30 07:59:46 2012
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Thu, 30 Aug 2012 10:59:24 -0400
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Subject: [trill] Fwd: NomCom 2012-2013: Call for Nominations
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The nomcom is looking for candidates for IETF positions as below.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

---------- Forwarded message ----------
From: NomCom Chair <nomcom-chair@ietf.org>
Date: Mon, Aug 27, 2012 at 7:13 PM
Subject: NomCom 2012-2013: Call for Nominations
To: IETF Announcement List <ietf-announce@ietf.org>

The 2012-2013 Nominating Committee (NomCom) is seeking nominations
from now until September 24, 2012 . The open positions being considered
by this year's NomCom can be found at the end of this email or on the
NomCom 2012-2013 website:

https://www.ietf.org/group/nomcom/2012/

Nominations may be made by selecting the Nominate link at the top of
the NomCom 2012-2013 website or by visiting the following URL:

https://www.ietf.org/group/nomcom/2012/nominate

Note that nominations made using the web tool require an ietf.org (i.e.,
datatracker) account. You can create an ietf.org account by visiting the
following URL:

https://datatracker.ietf.org/accounts/create/

Nominations may also be made by email to nomcom12@ietf.org.
If you do so, please include the word "Nominate" in the Subject and
indicate in the email who is being nominated, their email address (to
confirm acceptance of the nomination), and the position for which you
are making the nomination. If you wish to nominate someone via email
for more than one position, please use separate emails to do so.

Self nomination is welcome.

NomCom 2012-2013 will follow the policy for "Open Disclosure of Willing
Nominees" described in RFC 5680.  As stated in RFC 5680: "The list of
nominees willing to be considered for positions under review in the
current NomCom cycle is not confidential". Willing Nominees for each
position will be publicly listed.

With the exception of publicly listing willing nominees, the
confidentiality requirements of RFC 3777 remain in effect.  All
feedback and NomCom deliberations will remain confidential and
will not be disclosed.

In order to ensure time to collect sufficient community feedback about
each of the willing nominees, nominations must be received by the
NomCom on or before September 24, 2012.

The NomCom appoints individuals to fill the open slots on the
IAOC, the IAB, and the IESG. This year, the NomCom willing be filling the
positions currently held by the following individuals, whose terms expire
in March 2013:

IAOC:
--------
Dave Crocker

IAB:
--------
Alissa Cooper
Joel Halpern
David Kessens
Danny McPherson
Jon Peterson
Dave Thaler

IESG:
--------
Russ Housley  (IETF Chair)
Pete Resnick  (Applications Area)
Ralph Droms  (Internet Area)
Ronald Bonica  (Operations and Management Area)
Robert Sparks  (Real-Time Applications and Infrastructure Area)
Adrian Farrel  (Routing Area)
Stephen Farrell  (Security Area)
Wesley Eddy  (Transport Area)

In addition to nominations, the Nominating Committee is actively
seeking community input on the jobs that need to be filled.  We have
received the job descriptions from the IAB, IESG, and IAOC and they can
be found at:

https://www.ietf.org/group/nomcom/2012/iaoc-requirements
https://www.ietf.org/group/nomcom/2012/iab-requirements
https://www.ietf.org/group/nomcom/2012/chair-requirements
https://www.ietf.org/group/nomcom/2012/iesg-requirements

However, we also need the community's views and input on the jobs
within each organization. If you have ideas on job responsibilities
(more, less, different), please let us know.  Please send suggestions
and feedback to nomcom12@ietf.org.

Thank you for your help in identifying qualified nominees.

Matt Lepinski
nomcom-chair@ietf.org

From krupakaran@force10networks.com  Fri Aug 31 03:01:24 2012
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From: Kesava Vijay Krupakaran <krupakaran@force10networks.com>
To: "trill@ietf.org" <trill@ietf.org>
Date: Fri, 31 Aug 2012 15:31:17 +0530
Thread-Topic: New draft for AF Load Share using Fair Share Scheduling
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Subject: [trill] New draft for AF Load Share using Fair Share Scheduling
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--_000_7A144FF78830994FAB72065E652E9C7F5F6BBDA4A7EXCHCLUSTER11_
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Hi fellow trillians,

We have proposed a new draft 'Fair Share AF Load Share', elaborating on an =
AF Load Share mechanism.

http://datatracker.ietf.org/doc/draft-kvk-trill-fair-share-af-load-share


Abstract:

   In an access LAN of a TRILL campus, the DRB can choose to load share

   the AF responsibility among other RBridges in the LAN. This document

   throws light on one such approach where the AF appointment is fair

   share scheduled among the RBridges.


We would love to hear your reviews and comments.

Cheers,
Krupa (kvk)


--_000_7A144FF78830994FAB72065E652E9C7F5F6BBDA4A7EXCHCLUSTER11_
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osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:=
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=3D"text/html; charset=3Dus-ascii"><meta name=3DGenerator content=3D"Micros=
oft Word 12 (filtered medium)"><style><!--
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	{mso-style-type:personal-compose;
	font-family:"Calibri","sans-serif";
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	{mso-style-name:"Plain Text Char";
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<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli=
nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>Hi fellow trilli=
ans,<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMso=
Normal>We have proposed a new draft &#8216;Fair Share AF Load Share&#8217;,=
 elaborating on an AF Load Share mechanism.<o:p></o:p></p><p class=3DMsoNor=
mal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><a href=3D"http://datatracker=
.ietf.org/doc/draft-kvk-trill-fair-share-af-load-share">http://datatracker.=
ietf.org/doc/draft-kvk-trill-fair-share-af-load-share</a><o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>Abstract:<o:=
p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp; In an access LAN of a TRIL=
L campus, the DRB can choose to load share<o:p></o:p></p><p class=3DMsoPlai=
nText>&nbsp;&nbsp; the AF responsibility among other RBridges in the LAN. T=
his document<o:p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp; throws ligh=
t on one such approach where the AF appointment is fair<o:p></o:p></p><p cl=
ass=3DMsoPlainText>&nbsp;&nbsp; share scheduled among the RBridges.<o:p></o=
:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><o:p>=
&nbsp;</o:p></p><p class=3DMsoNormal>We would love to hear your reviews and=
 comments.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=
=3DMsoNormal>Cheers,<o:p></o:p></p><p class=3DMsoNormal>Krupa (kvk)<o:p></o=
:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>=

--_000_7A144FF78830994FAB72065E652E9C7F5F6BBDA4A7EXCHCLUSTER11_--

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From: "Samer Salam (ssalam)" <ssalam@cisco.com>
To: "trill@ietf.org" <trill@ietf.org>
Thread-Topic: Rev2 of TRILL OAM Framework Document posted
Thread-Index: AQHNh7TDMLTLuUp8BEWf6AZOFeWklQ==
Date: Fri, 31 Aug 2012 20:11:10 +0000
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Cc: "Tissa Senevirathne \(tsenevir\)" <tsenevir@cisco.com>, Donald Eastlake <d3e3e3@gmail.com>, Sam Aldrin <sam.aldrin@gmail.com>
Subject: [trill] Rev2 of TRILL OAM Framework Document posted
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Hi,
We have posted an updated version of the TRILL OAM framework document
today. Feedback/comments are appreciated.

Regards,
Samer


On 12-08-31 1:07 PM, "internet-drafts@ietf.org" <internet-drafts@ietf.org>
wrote:

>
>A new version of I-D, draft-salam-trill-oam-framework-02.txt
>has been successfully submitted by Samer Salam and posted to the
>IETF repository.
>
>Filename:	 draft-salam-trill-oam-framework
>Revision:	 02
>Title:		 TRILL OAM Framework
>Creation date:	 2012-08-31
>WG ID:		 Individual Submission
>Number of pages: 23
>URL:            =20
>http://www.ietf.org/internet-drafts/draft-salam-trill-oam-framework-02.txt
>Status:         =20
>http://datatracker.ietf.org/doc/draft-salam-trill-oam-framework
>Htmlized:       =20
>http://tools.ietf.org/html/draft-salam-trill-oam-framework-02
>Diff:           =20
>http://www.ietf.org/rfcdiff?url2=3Ddraft-salam-trill-oam-framework-02
>
>Abstract:
>   This document specifies a reference framework for Operations,
>   Administration and Maintenance (OAM) in TRILL networks. The focus of
>   the document is on the fault and performance management aspects of
>   TRILL OAM.
>
>
>                 =20
>       =20
>
>
>The IETF Secretariat
>


From internet-drafts@ietf.org  Fri Aug 31 14:01:25 2012
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Date: Fri, 31 Aug 2012 14:01:24 -0700
Cc: trill@ietf.org
Subject: [trill] I-D Action: draft-ietf-trill-rbridge-mib-08.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Transparent Interconnection of Lots of Li=
nks Working Group of the IETF.

	Title           : Definitions of Managed Objects for RBridges (Routing Bri=
dges)
	Author(s)       : Anil Rijhsinghani
                          Kate Zebrose
	Filename        : draft-ietf-trill-rbridge-mib-08.txt
	Pages           : 53
	Date            : 2012-08-31

Abstract:
   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols.  In particular it defines
   objects for managing an RBridge (Routing Bridge), also known as a
   TRILL Switch, based on the IETF TRILL (Transparent Interconnection of
   Lots of Links) protocol.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-trill-rbridge-mib

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-trill-rbridge-mib-08

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-trill-rbridge-mib-08


Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/