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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: <mpls@ietf.org>
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Date: Thu, 1 Feb 2018 15:38:21 -0000
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Subject: [mpls] FW: I-D Action: draft-farrel-mpls-sfc-03.txt
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Hi,

Loa did a review so we made a few minor updates for clarity.

Cheers,
Adrian

> -----Original Message-----
> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> Sent: 01 February 2018 15:18
> To: i-d-announce@ietf.org
> Subject: I-D Action: draft-farrel-mpls-sfc-03.txt
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> 
> 
>         Title           : An MPLS-Based Forwarding Plane for Service Function
Chaining
>         Authors         : Adrian Farrel
>                           Stewart Bryant
>                           John Drake
> 	Filename        : draft-farrel-mpls-sfc-03.txt
> 	Pages           : 23
> 	Date            : 2018-02-01
> 
> Abstract:
>    Service Function Chaining (SFC) is the process of directing packets
>    through a network so that they can be acted on by an ordered set of
>    abstract service functions before being delivered to the intended
>    destination.  An architecture for SFC is defined in RFC7665.
> 
>    The Network Service Header (NSH) can be inserted into packets to
>    steer them along a specific path to realize a Service Function Chain.
> 
>    Multiprotocol Label Switching (MPLS) is a widely deployed forwarding
>    technology that uses labels to identify the forwarding actions to be
>    taken at each hop through a network.  Segment Routing is a mechanism
>    that provides a source routing paradigm for steering packets in an
>    MPLS network.
> 
>    This document describes how Service Function Chaining can be achieved
>    in an MPLS network by means of a logical representation of the NSH in
>    an MPLS label stack.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-farrel-mpls-sfc/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-farrel-mpls-sfc-03
> https://datatracker.ietf.org/doc/html/draft-farrel-mpls-sfc-03
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-farrel-mpls-sfc-03
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
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> Internet-Draft directories: http://www.ietf.org/shadow.html
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From nobody Thu Feb  1 20:35:54 2018
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To: Greg Mirsky <gregimirsky@gmail.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
Cc: "draft-ietf-mpls-static-yang@ietf.org" <draft-ietf-mpls-static-yang@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, Michael Gorokhovsky <Michael.Gorokhovsky@ecitele.com>, "draft-ietf-mpls-static-yang@ietf.org" <draft-ietf-mpls-static-yang@ietf.org>
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From: Loa Andersson <loa@pi.nu>
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Subject: Re: [mpls] YANG for MPLS-TP?
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Greg, Sasha, working group,

First, yes Greg is right, review of e.g. draft-zhang-mpls-tp-yang-oam,
comments on if this is something we should work on would be very good.

Second, I take it that you talk about a new MPLS-TP yang document.
Between draft-zhang-mpls-tp-yang-oam and draft-ietf-mpls-static-yang,
what is needed. Could that be covered in one the existing documents.

/Loa

On 2018-01-31 09:32, Greg Mirsky wrote:
> Hi Sasha,
> although we had MPLS WG invited to the discussion, I'm calling on Loa 
> (hi, Loa!) to look into it.
> Your the most detailed questions prompted me to investigate and ask my 
> colleagues. Indeed, ITU-T SG-15 is working on G.8152 Protocol-neutral 
> management information model for the MPLS-TP network element. SG-15 uses 
> UML to define informational model so that, as I understand, YANG data 
> model can be produced automatically (almost). I haven't inspected the 
> document in all the details but got feeling that MPLS-TP Identifiers and 
> MPLS-TP OAM, ITU-style, have been addressed. Taking on IETF-style 
> MPLS-TP OAM YANG model seems to me both logical and useful. Should we, 
> or someone else interested, take on MPLS-TP Linear and Ring protection 
> RFCs - depends on whether SG-15 using G.8131 sufficiently cover RFC 6378.
> I'm very much interested to have comments from MPLS WG whether work on 
> aspects of MPLS-TP data model, including 
> draft-zhang-mpls-tp-yang-oam ,is of interest and has WG support.
> 
> Regards,
> Greg
> 
> On Tue, Jun 14, 2016 at 3:22 AM, Alexander Vainshtein 
> <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>> wrote:
> 
>     Hi all,____
> 
>     I wonder what are the WG plans (if any) regarding YANG data models
>     for MPLS-TP.____
> 
>     __ __
> 
>     While it is obviously true that static MPLS and MPLS-TP are
>     different (neither is the subset of the other), MPLS-TP is today the
>     most important application of static MPLS. ____
> 
>     __ __
> 
>     However, after looking up draft-ietf-mpls-static-yang
>     <https://datatracker.ietf.org/doc/draft-ietf-mpls-static-yang/?include_text=1>
>     I did not find there any mention of MPLS-TP-specific issues.____
> 
>     __ __
> 
>     One example that comes to mind is co-routed bi-directional and
>     associated bi-directional MPLS-TP LSPs. Other issues include:____
> 
>     __1.__MPLS-TP Identifiers (i.e. YANG model for RFC 6370
>     <https://tools.ietf.org/html/rfc6370>). From my POV such a data
>     model is a pre-requisite for all MPLS-TP-related work____
> 
>     __2.__MPLS-TP protection mechanisms____
> 
>     __3.__MPLS-TP OAM mechanisms. There is an individual draft
>     <https://datatracker.ietf.org/doc/draft-zhang-mpls-tp-yang-oam/?include_text=1>
>     that tries to address these issues, but it looks to me like very
>     much incomplete. E.g.:____
> 
>     __o__It does not even mention RFC 6428
>     <https://tools.ietf.org/html/rfc6428>____
> 
>     __o__While RFC 6427 <https://tools.ietf.org/html/rfc6427> appears in
>     the list of Normative references in this draft, there are no actual
>     references to this document.____
> 
>     __ __
> 
>     Any inputs in this regard would be highly appreciated.____
> 
>     __ __
> 
>     Regards, and lots of thanks in advance,____
> 
>     Sasha____
> 
>     __ __
> 
>     Office: +972-39266302 <tel:+972%203-926-6302>____
> 
>     Cell: +972-549266302 <tel:+972%2054-926-6302>____
> 
>     Email: Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>____
> 
>     __ __
> 
> 
>     _______________________________________________
>     mpls mailing list
>     mpls@ietf.org <mailto:mpls@ietf.org>
>     https://www.ietf.org/mailman/listinfo/mpls
>     <https://www.ietf.org/mailman/listinfo/mpls>
> 
> 

-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Huawei Technologies (consultant)     phone: +46 739 81 21 64


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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/_Oqd4mmRrY168vQRfyLCVoyi_tE>
Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
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Content-Type: text/plain; charset="us-ascii"
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Hi,

The WGLC for draft-ietf-mpls-ri-rsvp-frr-02 is closed. I think we can move =
forward - there was support on the mailing list.
But there are also some comments which need to be taken into account.  Can =
the authors please address the comments
and post an updated version of the document.

Regards

Nic

Von: Leymann, Nicolai
Gesendet: Mittwoch, 10. Januar 2018 15:57
An: mpls@ietf.org
Cc: mpls-chairs@ietf.org; tsaad@cisco.com
Betreff: WGLC for draft-ietf-mpls-ri-rsvp-frr-02

Working Group,

This is to initiate a two week MPLS working group last call in on
draft-ietf-mpls-ri-rsvp-frr-02.

Please send your comments to the mpls wg mailing list (mpls@ietf.org<mailto=
:mpls@ietf.org>).

Please note that there is already one IPR disclosed for the individual
document:

https://datatracker.ietf.org/ipr/2580/

All the authors and contributors have stated on the working group
mailing list that they are not aware of any other IPRs that relates to
this document.

As with any WGLC, working group participants are requested to read
the document and comment. If you feel that the document is ready
for publication, it is appropriate to respond to the WGLC with a short
and simple email indicating support.

This working group last call ends January 24th, 2018.

Regards

Nic


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Hi,<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US">The WGLC for draft-ietf-mpls-ri-rsvp-frr-02 is closed. I think we can=
 move forward &#8211; there was support on the mailing list.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US">But there are also some comments which need to be taken into account.=
 &nbsp;Can the authors please address the comments<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US">and post an updated version of the document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US">Regards<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US">Nic<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-US"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b>Von:</b> Leymann, Nicolai <br>
<b>Gesendet:</b> Mittwoch, 10. Januar 2018 15:57<br>
<b>An:</b> mpls@ietf.org<br>
<b>Cc:</b> mpls-chairs@ietf.org; tsaad@cisco.com<br>
<b>Betreff:</b> WGLC for draft-ietf-mpls-ri-rsvp-frr-02<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal">Working Group,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">This is to initiate a two week MPLS working group la=
st call in on
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">draft-ietf-mpls-ri-rsvp-frr-02.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Please send your comments to the mpls wg mailing lis=
t (<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>).<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Please note that there is already one IPR disclosed =
for the individual
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">document:<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/ipr/2580/">h=
ttps://datatracker.ietf.org/ipr/2580/</a><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">All the authors and contributors have stated on the =
working group
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">mailing list that they are not aware of any other IP=
Rs that relates to
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">this document. <o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">As with any WGLC, working group participants are req=
uested to read
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">the document and comment. If you feel that the docum=
ent is ready
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">for publication, it is appropriate to respond to the=
 WGLC with a short
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">and simple email indicating support. <o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">This working group last call ends January 24th, 2018=
.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Regards<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Nic<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
</div>
</body>
</html>

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From nobody Sat Feb 10 01:08:50 2018
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Subject: [mpls] I-D Action: draft-ietf-mpls-ri-rsvp-frr-03.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching WG of the IETF.

        Title           : Refresh Interval Independent FRR Facility Protection
        Authors         : Chandra Ramachandran
                          Ina Minei
                          Dante Pacella
                          Tarek Saad
	Filename        : draft-ietf-mpls-ri-rsvp-frr-03.txt
	Pages           : 25
	Date            : 2018-02-10

Abstract:
    RSVP-TE relies on periodic refresh of RSVP messages to synchronize
    and maintain the LSP related states along the reserved path. In the
    absence of refresh messages, the LSP related states are
    automatically deleted. Reliance on periodic refreshes and refresh
    timeouts are problematic from the scalability point of view. The
    number of RSVP-TE LSPs that a router needs to maintain has been
    growing in service provider networks and the implementations should
    be capable of handling increase in LSP scale.

    RFC 2961 specifies mechanisms to eliminate the reliance on periodic
    refresh and refresh timeout of RSVP messages, and enables a router
    to increase the message refresh interval to values much longer than
    the default 30 seconds defined in RFC 2205. However, the protocol
    extensions defined in RFC 4090 for supporting fast reroute (FRR)
    using bypass tunnels implicitly rely on short refresh timeouts to
    cleanup stale states.

    In order to eliminate the reliance on refresh timeouts, the routers
    should unambiguously determine when a particular LSP state should be
    deleted. Coupling LSP state with the corresponding RSVP-TE signaling
    adjacencies as recommended in RSVP-TE Scaling Recommendations
    (draft-ietf-teas-rsvp-te-scaling-rec) will apply in scenarios other
    than RFC 4090 FRR using bypass tunnels. In scenarios involving RFC
    4090 FRR using bypass tunnels, additional explicit tear down
    messages are necessary. Refresh-interval Independent RSVP FRR (RI-
    RSVP-FRR) extensions specified in this document consists of
    procedures to enable LSP state cleanup that are essential in
    scenarios not covered by procedures defined in RSVP-TE Scaling
    Recommendations. Hence, this document updates the semantics of
    Refresh-Interval Independent RSVP (RI-RSVP) capability specified in
    RSVP-TE Scaling Recommendations (draft-ietf-teas-rsvp-te-scaling-
    rec).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-ri-rsvp-frr/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-mpls-ri-rsvp-frr-03
https://datatracker.ietf.org/doc/html/draft-ietf-mpls-ri-rsvp-frr-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-ri-rsvp-frr-03


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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


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From: Alexander Okonnikov <alexander.okonnikov@gmail.com>
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To: Chandrasekar Ramachandran <csekar@juniper.net>
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Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
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	charset=utf-8

Hi Chandra,

My comments inline.

> 8 =D1=84=D0=B5=D0=B2=D1=80. 2018 =D0=B3., =D0=B2 21:49, Chandrasekar =
Ramachandran <csekar@juniper.net> =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB=
(=D0=B0):
>=20
> Hi Alexander,
> Please refer to my responses inline.
> =20
> From: Alexander Okonnikov [mailto:alexander.okonnikov@gmail.com =
<mailto:alexander.okonnikov@gmail.com>]=20
> Sent: Monday, January 29, 2018 7:31 PM
> To: Chandrasekar Ramachandran <csekar@juniper.net =
<mailto:csekar@juniper.net>>; Mike Taillon (mtaillon) =
<mtaillon@cisco.com <mailto:mtaillon@cisco.com>>
> Cc: mpls@ietf.org <mailto:mpls@ietf.org>; mpls-chairs@ietf.org =
<mailto:mpls-chairs@ietf.org>
> Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
> =20
> Hi Chandra,
>=20
> I'm sorry. Yes, I mixed these two drafts. Follow is my comments for =
draft-ietf-mpls-ri-rsvp-frr-02:
>=20
> Section 2:
>=20
> "NP-MP node: Merger Point router at the tail of Node-protecting bypass =
tunnel."
>=20
> Merger -> Merge
>=20
> [Chandra] I will fix this in the next version of the draft.
>=20
>=20
> Section 4.1.1:
>=20
> "If the NP-MP in a different area has not included NodeID in RRO, then =
the PLR SHOULD use NP-MP's interface address present in the RRO."
>=20
> It would cause for NodeID-based adjacency and bypass tunnel to be =
broken in case of Nhop node failure.
>=20
> [Chandra] Inclusion of NodeID in RRO is a SHOULD clause in the draft.
>=20
>     -  The PLR SHOULD also include its router ID in a NodeID =
sub-object
>       in PATH RRO unless configured explicitly not to include NodeID.
>       While including its router ID in the NodeID sub-object carried =
in
>       the outgoing Path message, the PLR MUST include the NodeID sub-
>       object after including its IPv4/IPv6 address or unnumbered
>       interface ID sub-object.
> So the condition you have pointed out is the case that may occur if =
the PLR is explicitly configured by policy not to include NodeID in the =
RRO. It should also be noted that even if PLR is configured not to =
include NodeID in RRO, the PLR can offer protection for the following =
failures.
>=20
> 1.       PLR nhop link failure
>=20
> 2.       Nhop node control plane failures that do not automatically =
result in LoS at the NP-MP
>=20
> Hence, the draft does not specify inclusion of NodeID as a MUST =
condition.
>=20
>=20
>=20
Here I said about not inclusion of NodeID by MP in RESV RRO, not by PLR.

Per RFC 4090, backup LSP cannot traverse protected node and/or link. In =
many cases link between protected node and MP will also be protected =
link (as part of protected node). Unless MP's phop link is LAN, and =
backup LSP's upstream hop is on the same LAN and different from =
protected node, backup LSP will be broken in case of node failure.

>=20
> Section 4.1.3:
>=20
> "In addition to the above procedures, the node SHOULD check the =
presence of remote signaling adjacency with PLR. If a matching Bypass =
Summary FRR Extended Association object is found in the PATH and if the =
RSVP-TE signaling adjacency is also present, then the node concludes =
that the PLR will undertake refresh-interval independent FRR procedures =
specified in this document."
>=20
> What if PLR implements Summary FRR, but doesn't support RI-RSVP and =
has established signaling adjacency for purpose other than RI-RSVP? =
Should not MP analyze I-bit in NodeID-based Hello message from PLR, like =
PLR does for NodeID Hello messages received from MP?
>=20
>=20
> [Chandra] I will modify the first sentence as the one below:
>=20
>     In addition to the above procedures, the node SHOULD check the
>     presence of remote signaling adjacency with RI-RSVP capable =
[TE-SCALE-REC] PLR.
>=20
>=20
> "If the PLR has included NodeID sub-object in PATH RRO, then that =
NodeID is the remote neighbor address. Otherwise, the PLR's interface =
address in PATH RRO will be the remote neighbor address."
>=20
> Maybe it should be said: "Otherwise, the address from =
Bypass_Source_IPv4_Address field of Bypass Summary FRR Extended =
Association object will be the remote neighbor address"? If not then in =
this case PLR will use another address (different from its one in RRO) =
as source for its bypass tunnel such that MP will not be able to match =
two interface addresses (one for remote neighbor address from RRO and =
another for bypass source address) of PLR in order to perform matching =
of Bypass Summary FRR Extended Association to NodeID hello adjacency. =
Also, if MP will use PLR's interface address from RRO, NodeID session =
probably will be broken in case of Nhop link/node failure on PLR.
>=20
> [Chandra] It should be noted that if the PLR and the MP are in the =
same IGP area, the Bypass_source_IPv4_address field B-SFRR extended =
association object may also be an interface address (Of course, the =
interface address that PLR uses as the source address of the bypass =
tunnel will be different from the protected interface address =E2=80=93 =
otherwise basic FRR will itself break). In such a case, the MP may =
utilize the TED to determine whether the Bypass_source_IPv4_address =
corresponds to the same node as the content of the node-id sub-object =
included by the PLR. I will add the following text to this paragraph to =
clarify this.
>=20
>     In addition to the above procedures, the node SHOULD check the
>     presence of remote signaling adjacency with PLR. If a matching
>     Bypass Summary FRR Extended Association object is found in the =
PATH
>     and if the RSVP-TE signaling adjacency is also present, then the
>     node concludes that the PLR will undertake refresh-interval
>     independent FRR procedures specified in this document. If the PLR
>     has included NodeID sub-object in PATH RRO, then that NodeID is =
the
>     remote neighbor address. Otherwise, the PLR's interface address in
>     PATH RRO will be the remote neighbor address. In order to enable
>     the MP to match the bypass source address in B-SFRR Extended=20
>     Association object with the RSVP-TE signaling adjacency with the
>     PLR, the bypass source address in B-SFRR Extended Association =
object
>     should either be (a) the same as the PLR=E2=80=99s address used =
for Hello
>     messages of RSVP-TE signaling adjacency or, (b) attached on the =
same
>     node on TED as the PLR=E2=80=99s address used for Hello messages =
of RSVP-TE
>     signaling adjacency.
>   =20
>=20
>=20
What about follow sentence? "Otherwise, the PLR's interface address in =
PATH RRO will be the remote neighbor address."

If the PLR has been established adjacency from its IP address that is =
present in PATH RRO (i.e. IP address of protected link), then after =
failure the adjacency will be broken. As a result, MP will remove normal =
and remote path state.

My point here is that PLR must not establish NodeID hello session using =
IP address of protected link.

> Section 4.4.2:
>=20
> "When a router that has already made NP available detects a change in =
the RRO carried in RESV message, and if the RRO change indicates that =
the router's former NP-MP is no longer present in the LSP path, then the =
router SHOULD send "Remote" PathTear directly to its former NP-MP."
>=20
> What if MP doesn't signal its NodeID in Resv RRO, and PLR and MP are =
in different areas? In this case it could be that "old" and "new" NNhops =
in fact are the same node.
>=20
> [Chandra] This has already been discussed at length in Section 4.1.1 =
itself (on how to select the destination address for bypass LSP) and =
will only be a repetition in Section 4.4.2.=20
>=20
>=20
I feel that I need to provide example here. R1 and R3 are in different =
areas, R2 and R4 are ABRs. R3 doesn't insert its NodeID in RESV RRO.


R1-----R2-----R3
 |      |     |
 +-----R4-----+

Before failure R1 receives RESV RRO that contains R3's R3->R2 address. =
Then link R2-R3 had been broken, and R2 has activated FRR and signaled =
backup LSP R2-R4-R3. As a result R1 now receives RESV RRO with R3's =
R3->R4 address. As soon as R3's R3->R2 address is not present in RESV =
RRO, R1 concludes that R3 is not present on LSP path anymore. Hence it =
sends remote PathTear to R3.

My point here is that PLR can use this procedure, unless NP-MP is in =
different area and doesn't insert its NodeID in RESV RRO. I.e. in this =
case PLR is not able to identify whether new and old NNhops are the same =
node or two different ones.
>=20
> Section 4.5.2.1:
>=20
> It is clear that if neighbor doesn't signal I-bit then it doesn't =
support RI-RSVP-FRR. But what if it signals I-bit? It could mean that it =
supports RI-RSVP, but not RI-RSVP-FRR. Particularly, it could be that =
downstream neighbor doesn't support Conditional PathTear, and thus will =
treat Conditional PathTear as normal one.
>=20
> [Chandra] As explained in Section 3, there are gaps in introducing =
refresh-interval independence to RFC 4090 facility FRR. Hence, if an =
implementation has to support both RFC 4090 facility FRR and RI-RSVP, =
then this draft should also be supported. In other words, the RI-RSVP =
flag means both draft in the context RFC 4090 facility FRR.
>=20
> Previously, draft-ietf-teas-rsvp-te-scaling-rec (RI-RSVP) used to have =
text in Section 3 that mandated the support of =
draft-ietf-mpls-ri-rsvp-frr =
(seehttps://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02 =
<https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02>) in =
the context of RFC 4090 facility FRR. The authors have subsequently =
removed the line based on a comment that the TEAS draft should be =
technology independent.
>=20
> You point is valid and we will address this by making =
draft-ietf-mpls-ri-rsvp-frr semantically update the RI-RSVP flag in the =
context of RFC 4090 facility FRR. IOW draft-ietf-mpls-ri-rsvp-frr =
updates draft-ietf-teas-rsvp-te-scaling-rec.
>=20
>=20
> Section 4.5.2.2:
>=20
> "- If node protection is requested and the Phop node does not support =
the RI-RSVP-FRR extensions, then the node SHOULD reduce the "refresh =
period" in TIME_VALUES object carried in PATH to default value."
>=20
> Was it meant RESV in place of PATH?
>=20
> [Chandra] TIME_VALUES object in both PATH and RESV should be modified =
to carry short refresh interval. This is illustrated in the following =
portion of an LSP.
>=20
> =20
>=20
> =E2=80=A6 R11 ---- R12 --- R13 ---
>=20
> =20
>=20
> R11 does not support RI-RSVP whereas R12 and R13 do. If R12 did not =
use short refresh interval for signaling PATH messages to R13, then on =
R13 there will be disparity between the refresh periods of primary PATH =
arriving from R12 and the backup LSP PATH arriving from R11 after any =
failure. The benefits of long refresh would anyway be lost once R11 =
signals backup PATH to R13. Hence, instead of requiring R13 to handle =
the switch from long to short refresh after a failure in the network, it =
is recommended to have the refresh periods consistent across failures.
>=20
> =20
>=20
> In summary, if there is a router not supporting RI-RSVP in the =
network, then the =E2=80=9Cimpact=E2=80=9D radius will be (a) one in =
both upstream & downstream directions along with LSP path for LSPs =
requesting link protection, and (b) two in both upstream & downstream =
directions along with LSP path for LSPs requesting node protection.
>=20
> =20
>=20
> Thanks,
>=20
> Chandra.
>=20
>=20
> Thank you.
>=20
> 29.01.2018 16:40, Chandrasekar Ramachandran =D0=BF=D0=B8=D1=88=D0=B5=D1=82=
:
> Hi Alexander,
> RI-RSVP-FRR specification does not remove the backup LSP signaling but =
only uses B-SFRR association to enable the PLR to signal availability of =
local protection to the corresponding Merge Point (MP). The MP does not =
carry B-SFRR association back to the PLR for the actual FRR =
summarization. RI-RSVP-FRR aims to remove the dependencies that facility =
FRR has on a short refresh interval. So, with these extensions the LSP =
states on the Merge Point can remain long enough to ensure that PLR is =
not time constrained to schedule backup LSP signaling immediately.
> =20
> Your comment/question though is relevant to the actual FRR =
summarization (i.e. summary-frr draft) where the PLR does not have to =
send the entire backup LSP Path message to the MP after the failure.
> =20
> Thanks,
> Chandra.
> =20
> From: mpls [mailto:mpls-bounces@ietf.org =
<mailto:mpls-bounces@ietf.org>] On Behalf Of Alexander Okonnikov
> Sent: Saturday, January 27, 2018 3:25 AM
> To: Mike Taillon (mtaillon) <mtaillon@cisco.com> =
<mailto:mtaillon@cisco.com>
> Cc: mpls@ietf.org <mailto:mpls@ietf.org>; mpls-chairs@ietf.org =
<mailto:mpls-chairs@ietf.org>
> Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
> =20
> Hi,
> =20
> What about signaling of MTU, which in regular facility FRR is conveyed =
in ADSPEC within Path of backup LSP. Per my understanding with proposed =
solution this information is being lost. Maybe it could be done by =
signaling MTU in SUMMARY_FRR_BYPASS object and specifying procedure for =
MP regarding modifying ADSPEC objects of the protected LSPs.
> =20
> Thank you.
>=20
>=20
>=20
> 26 =D1=8F=D0=BD=D0=B2. 2018 =D0=B3., =D0=B2 20:04, Mike Taillon =
(mtaillon) <mtaillon@cisco.com <mailto:mtaillon@cisco.com>> =
=D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=B0):
> =20
> I have reviewed the latest version of this document and believe this =
is ready to progress to the next stage.
>=20
> Regards,
> -Mike (as a contributor)=20
> =20
> =20
> On Jan 10, 2018, at 9:56 AM, N.Leymann@telekom.de =
<mailto:N.Leymann@telekom.de> wrote:
> =20
> Working Group,
> =20
> This is to initiate a two week MPLS working group last call in on=20
> draft-ietf-mpls-ri-rsvp-frr-02.
> =20
> Please send your comments to the mpls wg mailing list (mpls@ietf.org =
<mailto:mpls@ietf.org>).
> =20
> Please note that there is already one IPR disclosed for the individual=20=

> document:
> =20
> https://datatracker.ietf.org/ipr/2580/ =
<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.o=
rg_ipr_2580_&d=3DDwMFaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3D=
iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=3DeW0CpjEzVwQYj4blOzVet21naP=
3yv894yzb0eNsfzVQ&s=3D7c5J69aODGQPWNcc2zevUqG2W0dlgUrPv5fFe-BbGl4&e=3D>
> =20
> All the authors and contributors have stated on the working group=20
> mailing list that they are not aware of any other IPRs that relates to=20=

> this document.=20
> =20
> As with any WGLC, working group participants are requested to read=20
> the document and comment. If you feel that the document is ready=20
> for publication, it is appropriate to respond to the WGLC with a short=20=

> and simple email indicating support.=20
> =20
> This working group last call ends January 24th, 2018.
> =20
> Regards
> =20
> Nic
> =20
> _______________________________________________
> mpls mailing list
> mpls@ietf.org <mailto:mpls@ietf.org>
> https://www.ietf.org/mailman/listinfo/mpls =
<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailm=
an_listinfo_mpls&d=3DDwMFaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoC=
I&r=3DiEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=3DeW0CpjEzVwQYj4blOzVe=
t21naP3yv894yzb0eNsfzVQ&s=3DlaVW7-nrUNOG8Uqb8hb1Rxi5cHgbR1OgHAf-ikU5DsU&e=3D=
>
> =20
> _______________________________________________
> mpls mailing list
> mpls@ietf.org <mailto:mpls@ietf.org>
> https://www.ietf.org/mailman/listinfo/mpls =
<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailm=
an_listinfo_mpls&d=3DDwMDaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoC=
I&r=3DiEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=3DqOtXhu4o1urgFIp2tneO=
y0W2FUPVH1vUrMqjwASJuIU&s=3DQGooQgdSL_viQdGJavb9u63_lo5hVN_PuDNN40mRCsw&e=3D=
>
> =20
> =20


--Apple-Mail=_537E07F6-176A-48E0-B351-43EB804694AC
Content-Transfer-Encoding: quoted-printable
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi =
Chandra,<div class=3D""><br class=3D""></div><div class=3D"">My comments =
inline.<br class=3D""><div><br class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">8 =D1=84=D0=B5=D0=B2=D1=80. 2018 =D0=B3., =D0=B2=
 21:49, Chandrasekar Ramachandran &lt;<a =
href=3D"mailto:csekar@juniper.net" class=3D"">csekar@juniper.net</a>&gt; =
=D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=B0):</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
TrebuchetMS; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: =
rgb(255, 255, 255);"><div style=3D"margin: 0in 0in 0.0001pt; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">Hi Alexander,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Please refer to my =
responses inline.<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"border-style: none none none solid; border-left-width: 1.5pt; =
border-left-color: blue; padding: 0in 0in 0in 4pt;" class=3D""><div =
class=3D""><div style=3D"border-style: solid none none; =
border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: =
3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><b class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: windowtext;" class=3D"">From:</span></b><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
windowtext;" class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span>Alexander Okonnikov [<a =
href=3D"mailto:alexander.okonnikov@gmail.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">mailto:alexander.okonnikov@gmail.com</a>]<span =
class=3D"Apple-converted-space">&nbsp;</span><br class=3D""><b =
class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Monday, January 29, 2018 =
7:31 PM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Chandrasekar Ramachandran =
&lt;<a href=3D"mailto:csekar@juniper.net" style=3D"color: purple; =
text-decoration: underline;" class=3D"">csekar@juniper.net</a>&gt;; Mike =
Taillon (mtaillon) &lt;<a href=3D"mailto:mtaillon@cisco.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">mtaillon@cisco.com</a>&gt;<br class=3D""><b =
class=3D"">Cc:</b><span class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:mpls@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">mpls@ietf.org</a>;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:mpls-chairs@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">mpls-chairs@ietf.org</a><br =
class=3D""><b class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [mpls] WGLC for =
draft-ietf-mpls-ri-rsvp-frr-02<o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D"">Hi =
Chandra,<o:p class=3D""></o:p></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">I'm sorry. Yes, I mixed these two =
drafts. Follow is my comments for draft-ietf-mpls-ri-rsvp-frr-02:<o:p =
class=3D""></o:p></p><p style=3D"margin-right: 0in; margin-left: 0in; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">Section 2:<br class=3D""><br class=3D"">"NP-MP node: Merger =
Point router at the tail of Node-protecting bypass tunnel."<br =
class=3D""><br class=3D"">Merger -&gt; Merge<br class=3D""><br =
class=3D""><b class=3D""><i class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(0, 112, 192);" =
class=3D"">[Chandra] I will fix this in the next version of the =
draft.</span></i></b><b class=3D""><i class=3D""><span style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif; color: windowtext;" =
class=3D""><o:p class=3D""></o:p></span></i></b></p><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><br =
class=3D"">Section 4.1.1:<br class=3D""><br class=3D"">"If the NP-MP in =
a different area has not included NodeID in RRO, then the PLR SHOULD use =
NP-MP's interface address present in the RRO."<br class=3D""><br =
class=3D"">It would cause for NodeID-based adjacency and bypass tunnel =
to be broken in case of Nhop node failure.<span style=3D"color: =
windowtext;" class=3D""><o:p class=3D""></o:p></span></p><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><b =
class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D"">[Chandra] =
Inclusion of NodeID in RRO is a SHOULD clause in the =
draft.</span></i></b><b class=3D""><i class=3D""><span style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif; color: windowtext;" =
class=3D""><o:p class=3D""></o:p></span></i></b></p><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 10pt; =
font-family: &quot;Courier New&quot;; color: windowtext;" =
class=3D"">&nbsp;&nbsp;&nbsp; -&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;; color: =
rgb(0, 112, 192);" class=3D"">The PLR SHOULD also include its router ID =
in a NodeID sub-object<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;; color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; in PATH RRO unless configured =
explicitly not to include NodeID.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;; color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While including its router ID =
in the NodeID sub-object carried in<o:p class=3D""></o:p></span></div><div=
 style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;; color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the outgoing Path message, the =
PLR MUST include the NodeID sub-<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;; color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; object after including its =
IPv4/IPv6 address or unnumbered<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;; color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; interface ID =
sub-object.</span><span style=3D"font-size: 10pt; font-family: =
&quot;Courier New&quot;; color: windowtext;" class=3D""><o:p =
class=3D""></o:p></span></div><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">So the condition you have pointed out is =
the case that may occur if the PLR is explicitly configured by policy =
not to include NodeID in the RRO. It should also be noted that even if =
PLR is configured not to include NodeID in RRO, the PLR can offer =
protection for the following failures.<o:p =
class=3D""></o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0.25in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><b class=3D""><i =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(0, 112, 192);" class=3D""><span class=3D"">1.<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span></i></b>=
<b class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D"">PLR nhop link =
failure<o:p class=3D""></o:p></span></i></b></p><p style=3D"margin-right: =
0in; margin-left: 0.25in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><b class=3D""><i =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(0, 112, 192);" class=3D""><span class=3D"">2.<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span></i></b>=
<b class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D"">Nhop node =
control plane failures that do not automatically result in LoS at the =
NP-MP<o:p class=3D""></o:p></span></i></b></p><p style=3D"margin-right: =
0in; margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">Hence, the draft does not specify =
inclusion of NodeID as a MUST condition.<o:p =
class=3D""></o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><br =
class=3D""></p></div></div></div></blockquote><div>Here I said about not =
inclusion of NodeID by MP in RESV RRO, not by PLR.</div><div><br =
class=3D""></div><div>Per RFC 4090, backup LSP cannot traverse protected =
node and/or link. In many cases link between protected node and MP will =
also be protected link (as part of protected node). Unless MP's phop =
link is LAN, and backup LSP's upstream hop is on the same LAN and =
different from protected node, backup LSP will be broken in case of node =
failure.</div><div class=3D""><br class=3D""></div><blockquote =
type=3D"cite" class=3D""><div class=3D""><div class=3D"WordSection1" =
style=3D"page: WordSection1; font-family: TrebuchetMS; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; background-color: rgb(255, 255, =
255);"><div style=3D"border-style: none none none solid; =
border-left-width: 1.5pt; border-left-color: blue; padding: 0in 0in 0in =
4pt;" class=3D""><p style=3D"margin-right: 0in; margin-left: 0in; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><br class=3D"">Section 4.1.3:<br class=3D""><br class=3D"">"In =
addition to the above procedures, the node SHOULD check the presence of =
remote signaling adjacency with PLR. If a matching Bypass Summary FRR =
Extended Association object is found in the PATH and if the RSVP-TE =
signaling adjacency is also present, then the node concludes that the =
PLR will undertake refresh-interval independent FRR procedures specified =
in this document."<br class=3D""><br class=3D"">What if PLR implements =
Summary FRR, but doesn't support RI-RSVP and has established signaling =
adjacency for purpose other than RI-RSVP? Should not MP analyze I-bit in =
NodeID-based Hello message from PLR, like PLR does for NodeID Hello =
messages received from MP?<br class=3D""><br class=3D""><span =
style=3D"color: windowtext;" class=3D""><o:p =
class=3D""></o:p></span></p><p style=3D"margin-right: 0in; margin-left: =
0in; font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><b class=3D""><i class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(0, 112, 192);" =
class=3D"">[Chandra] I will modify the first sentence as the one =
below:</span></i></b><b class=3D""><i class=3D""><span style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif; color: windowtext;" =
class=3D""><o:p class=3D""></o:p></span></i></b></p><pre style=3D"margin: =
0in 0in 0.0001pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D"">&nbsp;&nbsp;&nbsp; <span style=3D"color: =
rgb(0, 112, 192);" class=3D"">In addition to the above procedures, the =
node SHOULD check the<o:p class=3D""></o:p></span></pre><pre =
style=3D"margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; color: windowtext;" class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; =
presence of remote signaling adjacency with RI-RSVP capable =
[TE-SCALE-REC] PLR.</span><o:p class=3D""></o:p></pre><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><br =
class=3D""><br class=3D"">"If the PLR has included NodeID sub-object in =
PATH RRO, then that NodeID is the remote neighbor address. Otherwise, =
the PLR's interface address in PATH RRO will be the remote neighbor =
address."<br class=3D""><br class=3D"">Maybe it should be said: =
"Otherwise, the address from Bypass_Source_IPv4_Address field of Bypass =
Summary FRR Extended Association object will be the remote neighbor =
address"? If not then in this case PLR will use another address =
(different from its one in RRO) as source for its bypass tunnel such =
that MP will not be able to match two interface addresses (one for =
remote neighbor address from RRO and another for bypass source address) =
of PLR in order to perform matching of Bypass Summary FRR Extended =
Association to NodeID hello adjacency. Also, if MP will use PLR's =
interface address from RRO, NodeID session probably will be broken in =
case of Nhop link/node failure on PLR.<br class=3D""><br class=3D""><b =
class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D"">[Chandra] It =
should be noted that if the PLR and the MP are in the same IGP area, the =
Bypass_source_IPv4_address field B-SFRR extended association object may =
also be an interface address (Of course, the interface address that PLR =
uses as the source address of the bypass tunnel will be different from =
the protected interface address =E2=80=93 otherwise basic FRR will =
itself break). In such a case, the MP may utilize the TED to determine =
whether the Bypass_source_IPv4_address corresponds to the same node as =
the content of the node-id sub-object included by the PLR. I will add =
the following text to this paragraph to clarify this.<o:p =
class=3D""></o:p></span></i></b></p><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><span style=3D"color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp; In addition to the above procedures, the =
node SHOULD check the<o:p class=3D""></o:p></span></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 5.5pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; color: windowtext;" class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; =
presence of remote signaling adjacency with PLR. If a matching<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; color: =
windowtext;" class=3D""><span style=3D"color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp; Bypass Summary FRR Extended Association =
object is found in the PATH<o:p class=3D""></o:p></span></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 5.5pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; color: windowtext;" class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; and if =
the RSVP-TE signaling adjacency is also present, then the<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; color: =
windowtext;" class=3D""><span style=3D"color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp; node concludes that the PLR will undertake =
refresh-interval<o:p class=3D""></o:p></span></pre><pre style=3D"margin: =
0in 0in 0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier =
New&quot;; color: windowtext;" class=3D""><span style=3D"color: rgb(0, =
112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; independent FRR procedures =
specified in this document. If the PLR<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; color: =
windowtext;" class=3D""><span style=3D"color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp; has included NodeID sub-object in PATH =
RRO, then that NodeID is the<o:p class=3D""></o:p></span></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 5.5pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; color: windowtext;" class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; remote =
neighbor address. Otherwise, the PLR's interface address in<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; color: =
windowtext;" class=3D""><span style=3D"color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp; PATH RRO will be the remote neighbor =
address. <b class=3D""><u class=3D"">In order to enable<o:p =
class=3D""></o:p></u></b></span></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; the MP =
to match the bypass source address in B-SFRR Extended <o:p =
class=3D""></o:p></span></u></b></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;Association object with the RSVP-TE =
signaling adjacency with the<o:p =
class=3D""></o:p></span></u></b></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; PLR, =
the bypass source address in B-SFRR Extended Association object<o:p =
class=3D""></o:p></span></u></b></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; should =
either be (a) the same as the PLR=E2=80=99s address used for Hello<o:p =
class=3D""></o:p></span></u></b></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; =
messages of RSVP-TE signaling adjacency or, (b) attached on the same<o:p =
class=3D""></o:p></span></u></b></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; node on =
TED as the PLR=E2=80=99s address used for Hello messages of RSVP-TE<o:p =
class=3D""></o:p></span></u></b></pre><pre style=3D"margin: 0in 0in =
0.0001pt 5.5pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
color: windowtext;" class=3D""><b class=3D""><u class=3D""><span =
style=3D"color: rgb(0, 112, 192);" class=3D"">&nbsp;&nbsp;&nbsp; =
signaling adjacency.</span></u></b><o:p class=3D""></o:p></pre><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;; color: windowtext;" =
class=3D"">&nbsp;&nbsp;&nbsp;<o:p class=3D""></o:p></span></div><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><br =
class=3D""></p></div></div></div></blockquote><div>What about follow =
sentence? "Otherwise, the PLR's interface address in PATH RRO will be =
the remote neighbor address."</div><div><br class=3D""></div><div>If the =
PLR has been established adjacency from its IP address that is present =
in PATH RRO (i.e. IP address of protected link), then after failure the =
adjacency will be broken. As a result, MP will remove normal and remote =
path state.</div><div><br class=3D""></div><div>My point here is that =
PLR must not establish NodeID hello session using IP address of =
protected link.</div><div class=3D""><br class=3D""></div><blockquote =
type=3D"cite" class=3D""><div class=3D""><div class=3D"WordSection1" =
style=3D"page: WordSection1; font-family: TrebuchetMS; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; background-color: rgb(255, 255, =
255);"><div style=3D"border-style: none none none solid; =
border-left-width: 1.5pt; border-left-color: blue; padding: 0in 0in 0in =
4pt;" class=3D""><p style=3D"margin-right: 0in; margin-left: 0in; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">Section 4.4.2:<br class=3D""><br class=3D"">"When a router =
that has already made NP available detects a change in the RRO carried =
in RESV message, and if the RRO change indicates that the router's =
former NP-MP is no longer present in the LSP path, then the router =
SHOULD send "Remote" PathTear directly to its former NP-MP."<br =
class=3D""><br class=3D"">What if MP doesn't signal its NodeID in Resv =
RRO, and PLR and MP are in different areas? In this case it could be =
that "old" and "new" NNhops in fact are the same node.<br class=3D""><br =
class=3D""><b class=3D""><i class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(0, 112, 192);" =
class=3D"">[Chandra] This has already been discussed at length in =
Section 4.1.1 itself (on how to select the destination address for =
bypass LSP) and will only be a repetition in Section 4.4.2.<span =
class=3D"Apple-converted-space">&nbsp;</span></span></i></b><br =
class=3D""><br class=3D""></p></div></div></div></blockquote><div>I feel =
that I need to provide example here. R1 and R3 are in different areas, =
R2 and R4 are ABRs. R3 doesn't insert its NodeID in RESV =
RRO.</div><div><br class=3D""></div><div><br class=3D""></div><div><font =
face=3D"Courier New" class=3D"">R1-----R2-----R3</font></div><div><font =
face=3D"Courier New" class=3D"">&nbsp;| &nbsp; &nbsp; &nbsp;| &nbsp; =
&nbsp; |</font></div><div><font face=3D"Courier New" =
class=3D"">&nbsp;+-----R4-----+</font></div><div><br =
class=3D""></div><div>Before failure R1 receives RESV RRO that contains =
R3's R3-&gt;R2 address. Then link R2-R3 had been broken, and R2 has =
activated FRR and signaled backup LSP R2-R4-R3. As a result R1 now =
receives RESV RRO with R3's R3-&gt;R4 address. As soon as R3's R3-&gt;R2 =
address is not present in RESV RRO, R1 concludes that R3 is not present =
on LSP path anymore. Hence it sends remote PathTear to R3.</div><div><br =
class=3D""></div><div>My point here is that PLR can use this procedure, =
unless NP-MP is in different area and doesn't insert its NodeID in RESV =
RRO. I.e. in this case PLR is not able to identify whether new and old =
NNhops are the same node or two different ones.</div><blockquote =
type=3D"cite" class=3D""><div class=3D""><div class=3D"WordSection1" =
style=3D"page: WordSection1; font-family: TrebuchetMS; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; background-color: rgb(255, 255, =
255);"><div style=3D"border-style: none none none solid; =
border-left-width: 1.5pt; border-left-color: blue; padding: 0in 0in 0in =
4pt;" class=3D""><p style=3D"margin-right: 0in; margin-left: 0in; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><br class=3D"">Section 4.5.2.1:<br class=3D""><br class=3D"">It=
 is clear that if neighbor doesn't signal I-bit then it doesn't support =
RI-RSVP-FRR. But what if it signals I-bit? It could mean that it =
supports RI-RSVP, but not RI-RSVP-FRR. Particularly, it could be that =
downstream neighbor doesn't support Conditional PathTear, and thus will =
treat Conditional PathTear as normal one.<br class=3D""><br class=3D""><b =
class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D"">[Chandra] As =
explained in Section 3, there are gaps in introducing refresh-interval =
independence to RFC 4090 facility FRR. Hence, if an implementation has =
to support both RFC 4090 facility FRR and RI-RSVP, then this draft =
should also be supported. In other words, the RI-RSVP flag means both =
draft in the context RFC 4090 facility FRR.<o:p =
class=3D""></o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">Previously, =
draft-ietf-teas-rsvp-te-scaling-rec (RI-RSVP) used to have text in =
Section 3 that mandated the support of draft-ietf-mpls-ri-rsvp-frr =
(see<a =
href=3D"https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02=
" style=3D"color: purple; text-decoration: underline;" =
class=3D"">https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec=
-02</a>) in the context of RFC 4090 facility FRR. The authors have =
subsequently removed the line based on a comment that the TEAS draft =
should be technology independent.<o:p =
class=3D""></o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">You point is valid and we will address =
this by making draft-ietf-mpls-ri-rsvp-frr semantically update the =
RI-RSVP flag in the context of RFC 4090 facility FRR. IOW =
draft-ietf-mpls-ri-rsvp-frr updates =
draft-ietf-teas-rsvp-te-scaling-rec.</span></i></b><br class=3D""><br =
class=3D""><br class=3D"">Section 4.5.2.2:<br class=3D""><br class=3D"">"-=
 If node protection is requested and the Phop node does not support the =
RI-RSVP-FRR extensions, then the node SHOULD reduce the "refresh period" =
in TIME_VALUES object carried in PATH to default value."<br class=3D""><br=
 class=3D"">Was it meant RESV in place of PATH?<o:p =
class=3D""></o:p></p><p style=3D"margin-right: 0in; margin-left: 0in; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><b class=3D""><i class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(0, 112, 192);" =
class=3D"">[Chandra] TIME_VALUES object in both PATH and RESV should be =
modified to carry short refresh interval. This is illustrated in the =
following portion of an LSP.<o:p class=3D""></o:p></span></i></b></p><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><b =
class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">=E2=80=A6 R11 ---- R12 --- R13 ---<o:p =
class=3D""></o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">R11 does not support RI-RSVP whereas R12 =
and R13 do. If R12 did not use short refresh interval for signaling PATH =
messages to R13, then on R13 there will be disparity between the refresh =
periods of primary PATH arriving from R12 and the backup LSP PATH =
arriving from R11 after any failure. The benefits of long refresh would =
anyway be lost once R11 signals backup PATH to R13. Hence, instead of =
requiring R13 to handle the switch from long to short refresh after a =
failure in the network, it is recommended to have the refresh periods =
consistent across failures.<o:p class=3D""></o:p></span></i></b></p><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><b =
class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">In summary, if there is a router not =
supporting RI-RSVP in the network, then the =E2=80=9Cimpact=E2=80=9D =
radius will be (a) one in both upstream &amp; downstream directions =
along with LSP path for LSPs requesting link protection, and (b) two in =
both upstream &amp; downstream directions along with LSP path for LSPs =
requesting node protection.<o:p class=3D""></o:p></span></i></b></p><p =
style=3D"margin-right: 0in; margin-left: 0in; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><b =
class=3D""><i class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(0, 112, 192);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">Thanks,<o:p =
class=3D""></o:p></span></i></b></p><p style=3D"margin-right: 0in; =
margin-left: 0in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><b class=3D""><i class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(0, 112, 192);" class=3D"">Chandra.<o:p =
class=3D""></o:p></span></i></b></p><p class=3D"MsoNormal" =
style=3D"margin: 0in 0in 12pt; font-size: 12pt; font-family: &quot;Times =
New Roman&quot;, serif;"><br class=3D"">Thank you.<o:p =
class=3D""></o:p></p><div class=3D""><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">29.01.2018 16:40, Chandrasekar Ramachandran =
=D0=BF=D0=B8=D1=88=D0=B5=D1=82:<o:p =
class=3D""></o:p></div></div><blockquote style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D""><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Hi =
Alexander,</span><o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">RI-RSVP-FRR =
specification does not remove the backup LSP signaling but only uses =
B-SFRR association to enable the PLR to signal availability of local =
protection to the corresponding Merge Point (MP). The MP does not carry =
B-SFRR association back to the PLR for the actual FRR summarization. =
RI-RSVP-FRR aims to remove the dependencies that facility FRR has on a =
short refresh interval. So, with these extensions the LSP states on the =
Merge Point can remain long enough to ensure that PLR is not time =
constrained to schedule backup LSP signaling immediately.</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Your comment/question =
though is relevant to the actual FRR summarization (i.e. summary-frr =
draft) where the PLR does not have to send the entire backup LSP Path =
message to the MP after the failure.</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Thanks,</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Chandra.</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"border-style: none none none solid; =
border-left-width: 1.5pt; border-left-color: blue; padding: 0in 0in 0in =
4pt;" class=3D""><div class=3D""><div style=3D"border-style: solid none =
none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><b class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">From:</span></b><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"Apple-converted-space">&nbsp;</span>mpls =
[</span><a href=3D"mailto:mpls-bounces@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" =
class=3D"">mailto:mpls-bounces@ietf.org</span></a><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">]<span class=3D"Apple-converted-space">&nbsp;</span><b =
class=3D"">On Behalf Of<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Alexander Okonnikov<br =
class=3D""><b class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Saturday, January 27, 2018 =
3:25 AM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Mike Taillon =
(mtaillon)<span class=3D"Apple-converted-space">&nbsp;</span></span><a =
href=3D"mailto:mtaillon@cisco.com" style=3D"color: purple; =
text-decoration: underline;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" =
class=3D"">&lt;mtaillon@cisco.com&gt;</span></a><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><br class=3D""><b =
class=3D"">Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span></span><a =
href=3D"mailto:mpls@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">mpls@ietf.org</span></a><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">;<span class=3D"Apple-converted-space">&nbsp;</span></span><a =
href=3D"mailto:mpls-chairs@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" =
class=3D"">mpls-chairs@ietf.org</span></a><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><br class=3D""><b =
class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [mpls] WGLC for =
draft-ietf-mpls-ri-rsvp-frr-02</span><o:p =
class=3D""></o:p></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div><div style=3D"margin:=
 0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">Hi,<o:p class=3D""></o:p></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">What about signaling of MTU, which in regular =
facility FRR is conveyed in ADSPEC within Path of backup LSP. Per my =
understanding with proposed solution this information is being lost. =
Maybe it could be done by signaling MTU in SUMMARY_FRR_BYPASS object and =
specifying procedure for MP regarding modifying ADSPEC objects of the =
protected LSPs.<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">Thank you.<o:p class=3D""></o:p></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><br =
class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></div><blockquote style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D""><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">26 =D1=8F=D0=BD=D0=B2. 2018 =D0=B3., =D0=B2=
 20:04, Mike Taillon (mtaillon) &lt;<a href=3D"mailto:mtaillon@cisco.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">mtaillon@cisco.com</a>&gt; =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=
=D0=BB(=D0=B0):<o:p class=3D""></o:p></div></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div><div =
class=3D""><div class=3D""><div class=3D""><div class=3D""><p =
class=3D"MsoNormal" style=3D"margin: 0in 0in 12pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;">I have reviewed the =
latest version of this document and believe this is ready to progress to =
the next stage.<o:p class=3D""></o:p></p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">Regards,<o:p class=3D""></o:p></div></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">-Mike (as a =
contributor)<span class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div><div class=3D""><blockquote style=3D"margin-top: =
5pt; margin-bottom: 5pt;" class=3D""><div class=3D""><div style=3D"margin:=
 0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">On Jan 10, 2018, at 9:56 AM,<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:N.Leymann@telekom.de" style=3D"color: purple; =
text-decoration: underline;" class=3D"">N.Leymann@telekom.de</a><span =
class=3D"Apple-converted-space">&nbsp;</span>wrote:<o:p =
class=3D""></o:p></div></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div class=3D""><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Working Group,</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">This is to initiate a two week MPLS working group last call =
in on<span class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">draft-ietf-mpls-ri-rsvp-frr-02.</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Please send your comments to the mpls wg mailing =
list (</span><a href=3D"mailto:mpls@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" =
class=3D"">mpls@ietf.org</span></a><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">).</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Please note that there is already one IPR =
disclosed for the individual<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">document:</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker=
.ietf.org_ipr_2580_&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb=
3voDTXcWzoCI&amp;r=3DiEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=3De=
W0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&amp;s=3D7c5J69aODGQPWNcc2zevUqG=
2W0dlgUrPv5fFe-BbGl4&amp;e=3D" style=3D"color: purple; text-decoration: =
underline;" class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" =
class=3D"">https://datatracker.ietf.org/ipr/2580/</span></a><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">All the authors and contributors have stated on =
the working group<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">mailing list that they are not aware of any =
other IPRs that relates to<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">this document.<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">As with any WGLC, working group participants are =
requested to read<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">the document and comment. If you feel that the =
document is ready<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">for publication, it is appropriate to respond to =
the WGLC with a short<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">and simple email indicating support.<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">This working group last call ends January 24th, =
2018.</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Regards</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Nic</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
9pt; font-family: Helvetica, sans-serif;" =
class=3D"">_______________________________________________<br =
class=3D"">mpls mailing list<br class=3D""></span><a =
href=3D"mailto:mpls@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D""><span style=3D"font-size: 9pt; font-family: =
Helvetica, sans-serif;" class=3D"">mpls@ietf.org</span></a><span =
style=3D"font-size: 9pt; font-family: Helvetica, sans-serif;" =
class=3D""><br class=3D""></span><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.or=
g_mailman_listinfo_mpls&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DiEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=
=3DeW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&amp;s=3DlaVW7-nrUNOG8Uqb8hb=
1Rxi5cHgbR1OgHAf-ikU5DsU&amp;e=3D" style=3D"color: purple; =
text-decoration: underline;" class=3D""><span style=3D"font-size: 9pt; =
font-family: Helvetica, sans-serif;" =
class=3D"">https://www.ietf.org/mailman/listinfo/mpls</span></a><o:p =
class=3D""></o:p></div></div></blockquote></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">_______________________________________________<br =
class=3D"">mpls mailing list<br class=3D""><a =
href=3D"mailto:mpls@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">mpls@ietf.org</a><br class=3D""><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.or=
g_mailman_listinfo_mpls&amp;d=3DDwMDaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DiEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=
=3DqOtXhu4o1urgFIp2tneOy0W2FUPVH1vUrMqjwASJuIU&amp;s=3DQGooQgdSL_viQdGJavb=
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--Apple-Mail=_537E07F6-176A-48E0-B351-43EB804694AC--


From nobody Tue Feb 13 09:49:40 2018
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/cQ09PnbTDzSmXkMYmfV0m5UDCyI>
Subject: [mpls] Datatracker State Update Notice: <draft-ietf-mpls-spring-entropy-label-08.txt>
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IESG state changed:

New State: Expert Review

(The previous state was Publication Requested)


Datatracker URL: https://datatracker.ietf.org/doc/draft-ietf-mpls-spring-entropy-label/


From nobody Thu Feb 15 09:41:42 2018
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching WG of the IETF.

        Title           : A YANG Data Model for MPLS Base
        Authors         : Tarek Saad
                          Kamran Raza
                          Rakesh Gandhi
                          Xufeng Liu
                          Vishnu Pavan Beeram
	Filename        : draft-ietf-mpls-base-yang-06.txt
	Pages           : 15
	Date            : 2018-02-15

Abstract:
   This document contains a specification of the the MPLS base YANG
   model.  The MPLS base YANG module serves as a base framework for
   configuring and managing an MPLS switching subsystem.  It is expected
   that other MPLS technology YANG models (e.g.  MPLS LSP Static, LDP or
   RSVP-TE models) will augment the MPLS base YANG model.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-base-yang/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-mpls-base-yang-06
https://datatracker.ietf.org/doc/html/draft-ietf-mpls-base-yang-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-base-yang-06


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
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From nobody Thu Feb 15 09:42:34 2018
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching WG of the IETF.

        Title           : A YANG Data Model for MPLS Static LSPs
        Authors         : Tarek Saad
                          Kamran Raza
                          Rakesh Gandhi
                          Xufeng Liu
                          Vishnu Pavan Beeram
	Filename        : draft-ietf-mpls-static-yang-05.txt
	Pages           : 20
	Date            : 2018-02-15

Abstract:
   This document contains the specification for the MPLS Static Label
   Switched Paths (LSPs) YANG model.  The model allows for the
   provisioning of static LSP(s) on LER(s) and LSR(s) devices along a
   LSP path without the dependency on any signaling protocol.  The MPLS
   Static LSP model augments the MPLS base YANG model with specific data
   to configure and manage MPLS Static LSP(s).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-static-yang/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-mpls-static-yang-05
https://datatracker.ietf.org/doc/html/draft-ietf-mpls-static-yang-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-static-yang-05


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/6P3YnxSvU5CWcUBNvqLfwkMQpbE>
Subject: Re: [mpls] I-D Action: draft-ietf-mpls-static-yang-05.txt
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As a YANG module, I think that this needs some - well, quite a lot of -
work

- Terminology section needs to reference RFC8174

- ietf-netmod-revised-datastores is the correct reference for most of
the terms in the Terminology section

- ietf-rib needs a reference (ietf-routing is the usual base routing
module)

- it references YANG 1.0 and not 1.1 - if this is justified, it needs an
explanation

- it is not NMDA compliant - this needs changing or justifying

- " and augments the MPLS Base YANG model defined in module
   "ietf-mpls" in [I-D.saad-mpls-static-yang].

ietf-mpls does not appear an the referenced I-D

- the I-D has five authors, the YANG module has ten

- the module lacks a copyright clause

- the imports need references, best provided with a reference clause for
each,  and again in the text of the I-D and in the I-D References
section
see
draft-ietf-ccamp-alarm-module
for an example of this

- good practice is to list the prefix used and the RFC in which they can
be found somewhere in the text of the I-D
draft-ietf-netmod-rfc8022bis
has an example of this

- the YANG module needs a reference back to the RFC in which it appears
along with a note to the RC editor to replace XXXX with the relevant
number - you have a reference to RFC3031 which is sadly mistaken

- If a reference to RFC3031 is warranted, then it needs to appear in the
text of the I-D and in the References section

- static-extended - same comments

- Security Considerations needs updating - it needs to call out the
vulnerable objects

Tom Petch

----- Original Message -----
From: <internet-drafts@ietf.org>
To: <i-d-announce@ietf.org>
Cc: <mpls@ietf.org>
Sent: Thursday, February 15, 2018 5:42 PM
Subject: I-D Action: draft-ietf-mpls-static-yang-05.txt


>
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> This draft is a work item of the Multiprotocol Label Switching WG of
the IETF.
>
>         Title           : A YANG Data Model for MPLS Static LSPs
>         Authors         : Tarek Saad
>                           Kamran Raza
>                           Rakesh Gandhi
>                           Xufeng Liu
>                           Vishnu Pavan Beeram
> Filename        : draft-ietf-mpls-static-yang-05.txt
> Pages           : 20
> Date            : 2018-02-15
>
> Abstract:
>    This document contains the specification for the MPLS Static Label
>    Switched Paths (LSPs) YANG model.  The model allows for the
>    provisioning of static LSP(s) on LER(s) and LSR(s) devices along a
>    LSP path without the dependency on any signaling protocol.  The
MPLS
>    Static LSP model augments the MPLS base YANG model with specific
data
>    to configure and manage MPLS Static LSP(s).
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-mpls-static-yang/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-mpls-static-yang-05
> https://datatracker.ietf.org/doc/html/draft-ietf-mpls-static-yang-05
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-static-yang-05
>
>
> Please note that it may take a couple of minutes from the time of
submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


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Subject: [mpls] RtgDir review: draft-ietf-mpls-spring-entropy-label
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: "<rtg-ads@ietf.org> (rtg-ads@ietf.org)" <rtg-ads@ietf.org>
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Thread-Topic: RtgDir review: draft-ietf-mpls-spring-entropy-label
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Date: Tue, 20 Feb 2018 15:09:52 +0000
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Subject: [mpls] RtgDir review: draft-ietf-mpls-spring-entropy-label
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--_000_HE1PR0701MB271403843E6045F404111EF7F0CF0HE1PR0701MB2714_--


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Subject: [mpls] =?utf-8?q?RFC_8320_on_LDP_Extensions_to_Support_Maximally_?= =?utf-8?q?Redundant_Trees?=
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A new Request for Comments is now available in online RFC libraries.

        
        RFC 8320

        Title:      LDP Extensions to Support Maximally 
                    Redundant Trees 
        Author:     A. Atlas,
                    K. Tiruveedhula,
                    C. Bowers, 
                    J. Tantsura,
                    IJ. Wijnands
        Status:     Standards Track
        Stream:     IETF
        Date:       February 2018
        Mailbox:    akatlas@juniper.net, 
                    kishoret@juniper.net, 
                    cbowers@juniper.net,
                    jefftant.ietf@gmail.com, 
                    ice@cisco.com
        Pages:      21
        Characters: 47801
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-mpls-ldp-mrt-07.txt

        URL:        https://www.rfc-editor.org/info/rfc8320

        DOI:        10.17487/RFC8320

This document specifies extensions to the Label Distribution Protocol
(LDP) to support the creation of Label Switched Paths (LSPs) for
Maximally Redundant Trees (MRTs).  A prime use of MRTs is for unicast
and multicast IP/LDP Fast Reroute, which we will refer to as
"MRT-FRR".

The sole protocol extension to LDP is simply the ability to advertise
an MRT Capability.  This document describes that extension and the
associated behavior expected for Label Switching Routers (LSRs) and
Label Edge Routers (LERs) advertising the MRT Capability.

MRT-FRR uses LDP multi-topology extensions, so three multi-topology
IDs have been allocated from the MPLS MT-ID space.

This document is a product of the Multiprotocol Label Switching Working Group of the IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
memo is unlimited.

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From nobody Fri Feb 23 01:53:53 2018
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Reply-To: <adrian@olddog.co.uk>
From: "Adrian Farrel" <adrian@olddog.co.uk>
To: <draft-nslag-mpls-deprecate-md5@ietf.org>
Cc: <mpls@ietf.org>
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Date: Fri, 23 Feb 2018 09:53:45 -0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/xNmdfrRlcCDAaCbMUMBpOyh8hPQ>
Subject: Re: [mpls] I-D Action: draft-nslag-mpls-deprecate-md5-00.txt
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Not bad as a stake in the ground, but it raises as many questions as it answers.
Not least among these is the status of TCP-AO implementation without which this
spec is not going to get traction.

You should probably make significant reference to RFC 6952.

Adrian

> -----Original Message-----
> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> Sent: 23 February 2018 04:53
> To: i-d-announce@ietf.org
> Subject: I-D Action: draft-nslag-mpls-deprecate-md5-00.txt
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> 
> 
>         Title           : Deprecating MD5 for LDP
>         Authors         : Loa Andersson
>                           Stewart Bryant
>                           Andrew G. Malis
>                           Deutshe Telekom
>                           George Swallow
> 	Filename        : draft-nslag-mpls-deprecate-md5-00.txt
> 	Pages           : 6
> 	Date            : 2018-02-22
> 
> Abstract:
>    When the MPLS Label Distribution Protocol (LDP) was specified circa
>    1999, there were very strong requirements that LDP should use a
>    cryptographic hash function to sign LDP protocol messages.  MD5 was
>    widely used at that time, and was the obvious choices.
> 
>    However, even when this decision was being taken there were concerns
>    as to whether MD5 was a strong enough signing option.  This
>    discussion was briefly reflected in section 5.1 of RFC 5036 [RFC5036]
>    (and also in RFC 3036 [RFC3036]).
> 
>    Over time it has been shown that MD5 can be compromised.  Thus, there
>    is a concern shared in the security community and the working groups
>    responsible for the development of the LDP protocol that LDP is no
>    longer adequately secured.
> 
>    This document deprecates MD5 as the signing method for LDP messages.
>    The document also selects a future method to secure LDP messages -
>    the choice is TCP-AO.  In addition, we specify that the TBD
>    cryptographic mechanism is to be the default TCP-AO security method.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-nslag-mpls-deprecate-md5/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-nslag-mpls-deprecate-md5-00
> https://datatracker.ietf.org/doc/html/draft-nslag-mpls-deprecate-md5-00
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
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From nobody Mon Feb 26 06:51:49 2018
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From: Chandrasekar Ramachandran <csekar@juniper.net>
To: Alexander Okonnikov <alexander.okonnikov@gmail.com>
CC: "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, Vishnu Pavan Beeram <vbeeram@juniper.net>
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From nobody Tue Feb 27 15:13:17 2018
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From: "\"IETF Secretariat\"" <agenda@ietf.org>
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Subject: [mpls] mpls - Requested session has been scheduled for IETF 101
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Dear Tarek Saad,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 

mpls Session 1 (2:30:00)
    Thursday, Morning Session I 0930-1200
    Room Name: Blenheim size: 200
    ---------------------------------------------
    


Request Information:


---------------------------------------------------------
Working Group Name: Multiprotocol Label Switching
Area Name: Routing Area
Session Requester: Tarek Saad

Number of Sessions: 1
Length of Session(s):  2.5 Hours
Number of Attendees: 100
Conflicts to Avoid: 
 First Priority: teas ccamp pce spring bess bfd idr pals bier detnet
 Second Priority: nvo3 sfc i2rs rtgarea rtgwg
 Third Priority: ospf isis sidr


People who must be present:
  George Swallow
  Loa Andersson
  Deborah Brungard
  Nicolai Leymann
  Tarek Saad

Resources Requested:

Special Requests:
  If 2.5 hr is not feasible, can exchange with 2x1hr slots
---------------------------------------------------------


From nobody Tue Feb 27 20:24:21 2018
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From: "Tarek Saad (tsaad)" <tsaad@cisco.com>
To: "mpls@ietf.org" <mpls@ietf.org>
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To: Chandrasekar Ramachandran <csekar@juniper.net>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, Vishnu Pavan Beeram <vbeeram@juniper.net>
References: <FRXPR01MB040778B3FB1875A5130DF6B298110@FRXPR01MB0407.DEUPRD01.PROD.OUTLOOK.DE> <7AF6585D-8133-497B-AB2B-51ACE1151B53@cisco.com> <755D5543-804A-4319-A7DB-6D2D9B922AA9@gmail.com> <BN3PR0501MB137715A1FE30162695F8C5ACD9E50@BN3PR0501MB1377.namprd05.prod.outlook.com> <e986009a-0b1c-7547-e037-c1ff2f6fd6e3@gmail.com> <CY1PR0501MB138828A8AA7D0F14F2E3BF48D9F30@CY1PR0501MB1388.namprd05.prod.outlook.com> <9B3EE129-1F74-4B4D-B551-56B0989894B4@gmail.com> <CY1PR0501MB1388F505FF91FDB7AF1817A6D9C10@CY1PR0501MB1388.namprd05.prod.outlook.com>
From: Alexander Okonnikov <alexander.okonnikov@gmail.com>
Message-ID: <3c79c287-0e0e-12d2-259a-be9450f8278b@gmail.com>
Date: Wed, 28 Feb 2018 18:48:46 +0300
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Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
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Hi Chandra,


Please, see inline.


Thank you.


26.02.2018 17:51, Chandrasekar Ramachandran пишет:
>
> Hi Alexander,
>
> Sorry about the delay in responding. Please see inline. If the 
> proposed modifications are acceptable, then I will make the update in 
> the next version soon.
>
> Thanks,
>
> Chandra.
>
> *From:*Alexander Okonnikov [mailto:alexander.okonnikov@gmail.com]
> *Sent:* Sunday, February 11, 2018 12:03 AM
> *To:* Chandrasekar Ramachandran <csekar@juniper.net>
> *Cc:* mpls@ietf.org; mpls-chairs@ietf.org; Vishnu Pavan Beeram 
> <vbeeram@juniper.net>
> *Subject:* Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
> Hi Chandra,
>
> My comments inline.
>
>
>
>     8 февр. 2018 г., в 21:49, Chandrasekar Ramachandran
>     <csekar@juniper.net <mailto:csekar@juniper.net>> написал(а):
>
>     Hi Alexander,
>
>     Please refer to my responses inline.
>
>     *From:*Alexander Okonnikov [mailto:alexander.okonnikov@gmail.com]
>     *Sent:*Monday, January 29, 2018 7:31 PM
>     *To:*Chandrasekar Ramachandran <csekar@juniper.net
>     <mailto:csekar@juniper.net>>; Mike Taillon (mtaillon)
>     <mtaillon@cisco.com <mailto:mtaillon@cisco.com>>
>     *Cc:*mpls@ietf.org <mailto:mpls@ietf.org>;mpls-chairs@ietf.org
>     <mailto:mpls-chairs@ietf.org>
>     *Subject:*Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
>     Hi Chandra,
>
>     I'm sorry. Yes, I mixed these two drafts. Follow is my comments
>     for draft-ietf-mpls-ri-rsvp-frr-02:
>
>     Section 2:
>
>     "NP-MP node: Merger Point router at the tail of Node-protecting
>     bypass tunnel."
>
>     Merger -> Merge
>
>     */[Chandra] I will fix this in the next version of the draft./*
>
>
>     Section 4.1.1:
>
>     "If the NP-MP in a different area has not included NodeID in RRO,
>     then the PLR SHOULD use NP-MP's interface address present in the RRO."
>
>     It would cause for NodeID-based adjacency and bypass tunnel to be
>     broken in case of Nhop node failure.
>
>     */[Chandra] Inclusion of NodeID in RRO is a SHOULD clause in the
>     draft./*
>
>         - The PLR SHOULD also include its router ID in a NodeID sub-object
>
>           in PATH RRO unless configured explicitly not to include NodeID.
>
>           While including its router ID in the NodeID sub-object
>     carried in
>
>           the outgoing Path message, the PLR MUST include the NodeID sub-
>
>           object after including its IPv4/IPv6 address or unnumbered
>
>           interface ID sub-object.
>
>     */So the condition you have pointed out is the case that may occur
>     if the PLR is explicitly configured by policy not to include
>     NodeID in the RRO. It should also be noted that even if PLR is
>     configured not to include NodeID in RRO, the PLR can offer
>     protection for the following failures./*
>
>     */1./**/PLR nhop link failure/*
>
>     */2./**/Nhop node control plane failures that do not automatically
>     result in LoS at the NP-MP/*
>
>     */Hence, the draft does not specify inclusion of NodeID as a MUST
>     condition./*
>
> Here I said about not inclusion of NodeID by MP in RESV RRO, not by PLR.
>
> Per RFC 4090, backup LSP cannot traverse protected node and/or link. 
> In many cases link between protected node and MP will also be 
> protected link (as part of protected node). Unless MP's phop link is 
> LAN, and backup LSP's upstream hop is on the same LAN and different 
> from protected node, backup LSP will be broken in case of node failure.
>
> */[Chandra] How about changing the paragraph to the following?/*
> *//*
>
>     -  While selecting the destination address of the bypass LSP, the
>
>      PLR SHOULD select the router ID of the NNhop or Nhop node set
>
>       in the NodeID sub-object included in RRO of RESV. If the MP has
>
>       not included NodeID sub-object in RESV RRO and if the PLR and
>
>       the MP are in same area, then the PLR may utilize the TED to
>
>       determine the router ID from the interface address in RRO. If the
>
>       NP-MP in a different area has not included NodeID in RRO, then the
>
>       PLR SHOULD NOT execute the procedures specified in this document
>
>       because the PLR cannot reliably determine an MP address that does
>
>       not share fate of the protected LSP.
>
> */The above text in effect recommends a router always include its 
> NodeID sub-object in the RRO object carried in PATH as well as RESV 
> message – as one of additional recommendations over RFC 4090 to 
> support FRR with RI-RSVP. Please see next response./*
I am OK with this change.
>
>
>     Section 4.1.3:
>
>     "In addition to the above procedures, the node SHOULD check the
>     presence of remote signaling adjacency with PLR. If a matching
>     Bypass Summary FRR Extended Association object is found in the
>     PATH and if the RSVP-TE signaling adjacency is also present, then
>     the node concludes that the PLR will undertake refresh-interval
>     independent FRR procedures specified in this document."
>
>     What if PLR implements Summary FRR, but doesn't support RI-RSVP
>     and has established signaling adjacency for purpose other than
>     RI-RSVP? Should not MP analyze I-bit in NodeID-based Hello message
>     from PLR, like PLR does for NodeID Hello messages received from MP?
>
>
>     */[Chandra] I will modify the first sentence as the one below:/*
>
>          In addition to the above procedures, the node SHOULD check the
>
>         presence of remote signaling adjacency with RI-RSVP capable
>     [TE-SCALE-REC] PLR.
>
>
>
>     "If the PLR has included NodeID sub-object in PATH RRO, then that
>     NodeID is the remote neighbor address. Otherwise, the PLR's
>     interface address in PATH RRO will be the remote neighbor address."
>
>     Maybe it should be said: "Otherwise, the address from
>     Bypass_Source_IPv4_Address field of Bypass Summary FRR Extended
>     Association object will be the remote neighbor address"? If not
>     then in this case PLR will use another address (different from its
>     one in RRO) as source for its bypass tunnel such that MP will not
>     be able to match two interface addresses (one for remote neighbor
>     address from RRO and another for bypass source address) of PLR in
>     order to perform matching of Bypass Summary FRR Extended
>     Association to NodeID hello adjacency. Also, if MP will use PLR's
>     interface address from RRO, NodeID session probably will be broken
>     in case of Nhop link/node failure on PLR.
>
>     */[Chandra] It should be noted that if the PLR and the MP are in
>     the same IGP area, the Bypass_source_IPv4_address field B-SFRR
>     extended association object may also be an interface address (Of
>     course, the interface address that PLR uses as the source address
>     of the bypass tunnel will be different from the protected
>     interface address – otherwise basic FRR will itself break). In
>     such a case, the MP may utilize the TED to determine whether the
>     Bypass_source_IPv4_address corresponds to the same node as the
>     content of the node-id sub-object included by the PLR. I will add
>     the following text to this paragraph to clarify this./*
>
>         In addition to the above procedures, the node SHOULD check the
>
>         presence of remote signaling adjacency with PLR. If a matching
>
>         Bypass Summary FRR Extended Association object is found in the
>     PATH
>
>         and if the RSVP-TE signaling adjacency is also present, then the
>
>         node concludes that the PLR will undertake refresh-interval
>
>         independent FRR procedures specified in this document. If the PLR
>
>         has included NodeID sub-object in PATH RRO, then that NodeID
>     is the
>
>         remote neighbor address. Otherwise, the PLR's interface address in
>
>         PATH RRO will be the remote neighbor address. *_In order to
>     enable_*
>
>     *_    the MP to match the bypass source address in B-SFRR Extended _*
>
>     *_    Association object with the RSVP-TE signaling adjacency with
>     the_*
>
>     *_    PLR, the bypass source address in B-SFRR Extended Association
>     object_*
>
>     *_    should either be (a) the same as the PLR’s address used for
>     Hello_*
>
>     *_    messages of RSVP-TE signaling adjacency or, (b) attached on
>     the same_*
>
>     *_    node on TED as the PLR’s address used for Hello messages of
>     RSVP-TE_*
>
>     *_    signaling adjacency._*
>
> What about follow sentence? "Otherwise, the PLR's interface address in 
> PATH RRO will be the remote neighbor address."
>
> If the PLR has been established adjacency from its IP address that is 
> present in PATH RRO (i.e. IP address of protected link), then after 
> failure the adjacency will be broken. As a result, MP will remove 
> normal and remote path state.
>
> My point here is that PLR must not establish NodeID hello session 
> using IP address of protected link.
>
> */[Chandra] Yes, I will remove that sentence. How about the following 
> as the opening paragraphs under Section 4.1.3?/*
>
> *//*
>
>     With regard to the MP procedures that are specified in
>
> RFC 4090 <https://tools.ietf.org/html/rfc4090>, this document 
> specifies the following additional
>
>     procedures.
>
>     Each router supporting this document SHOULD also include its
>
>     router ID in a NodeID sub-object in RRO object carried in the
>
>     RESV message unless configured explicitly not to include NodeID.
>
>     If the router does not include NodeID in RESV RRO and if the
>
>     PLR is in a different IGP area, then the router SHOULD NOT
>
>     execute the MP procedures specified in this document.
>
> */The above text is the counterpart for the proposed text for PLR 
> procedures (in addition to RFC 4090 procedures) in the previous 
> response above./*
>
/*OK.*/
>
>     Section 4.4.2:
>
>     "When a router that has already made NP available detects a change
>     in the RRO carried in RESV message, and if the RRO change
>     indicates that the router's former NP-MP is no longer present in
>     the LSP path, then the router SHOULD send "Remote" PathTear
>     directly to its former NP-MP."
>
>     What if MP doesn't signal its NodeID in Resv RRO, and PLR and MP
>     are in different areas? In this case it could be that "old" and
>     "new" NNhops in fact are the same node.
>
>     */[Chandra] This has already been discussed at length in Section
>     4.1.1 itself (on how to select the destination address for bypass
>     LSP) and will only be a repetition in Section 4.4.2./*
>
> I feel that I need to provide example here. R1 and R3 are in different 
> areas, R2 and R4 are ABRs. R3 doesn't insert its NodeID in RESV RRO.
>
> R1-----R2-----R3
>
>  |  |     |
>
>  +-----R4-----+
>
> Before failure R1 receives RESV RRO that contains R3's R3->R2 address. 
> Then link R2-R3 had been broken, and R2 has activated FRR and signaled 
> backup LSP R2-R4-R3. As a result R1 now receives RESV RRO with R3's 
> R3->R4 address. As soon as R3's R3->R2 address is not present in RESV 
> RRO, R1 concludes that R3 is not present on LSP path anymore. Hence it 
> sends remote PathTear to R3.
>
> */[Chandra] The backup LSP PATH is from a different Sender and is a 
> logically separate state (though tied to the primary PATH). Hence R2 
> should not send remote PathTear to R3. You have made a good point 
> because that is somewhat unclear in the draft. Would the following 
> text in Section 4.4.2 clarify this?/*
>
/*I was talking about sending remote PathTear by R1, not by R2. Before 
failure R1 is receiving Resv RRO as R3'-R2. After failure and signaling 
backup LSP by R2 it is receiving Resv RRO R3''-R4-R2. Here R3' is IP 
address of R3 on interface R3->R2 and R3'' is IP address of R3 on 
interface R3-R4. If R3 is not inserting NodeID in Resv RRO, R1 can't 
understand that R3' and R3'' are both the same node (R3).
*/
>
> *//*
>
> *//*
>
>     When a router that has already made NP available detects a change in
>
>     the RRO carried in RESV message, and if the RRO change indicates
>
>     that the router's former NP-MP is no longer present in the LSP path,
>
>     then the router SHOULD send "Remote" PathTear directly to its former
>
>     NP-MP. *_However, the change in RRO carried in backup LSP RESV 
> message_*
>
> *_    that a router detects during local repair actions must be 
> handled as_*
>
> *_    per RFC 4090._*
>
> *//*
>
> My point here is that PLR can use this procedure, unless NP-MP is in 
> different area and doesn't insert its NodeID in RESV RRO. I.e. in this 
> case PLR is not able to identify whether new and old NNhops are the 
> same node or two different ones.
>
> *//*
>
> */[Chandra] The clarifying text above should address the confusion? /*
>

/*Not specific to this section, but to the whole draft itself. May be it 
would be better near beginning of the draft to state as a prerequisite 
that all LSRs must include their NodeID into Path and Resv RROs, unless 
they could determine NodeID of each other by some other means. Otherwise 
the solution must not be utilized. Then in the body of the draft to omit 
cases when PLR and/or MP are not including their NodeID. Also, removing 
cases when remote adjacency is being established on non-NodeID addresses 
will avoid establishing of multiple remote adjacencies between a pair of 
LSRs.*/
>
> *//*
>
>
>     Section 4.5.2.1:
>
>     It is clear that if neighbor doesn't signal I-bit then it doesn't
>     support RI-RSVP-FRR. But what if it signals I-bit? It could mean
>     that it supports RI-RSVP, but not RI-RSVP-FRR. Particularly, it
>     could be that downstream neighbor doesn't support Conditional
>     PathTear, and thus will treat Conditional PathTear as normal one.
>
>     */[Chandra] As explained in Section 3, there are gaps in
>     introducing refresh-interval independence to RFC 4090 facility
>     FRR. Hence, if an implementation has to support both RFC 4090
>     facility FRR and RI-RSVP, then this draft should also be
>     supported. In other words, the RI-RSVP flag means both draft in
>     the context RFC 4090 facility FRR./*
>
>     */Previously, draft-ietf-teas-rsvp-te-scaling-rec (RI-RSVP) used
>     to have text in Section 3 that mandated the support of
>     draft-ietf-mpls-ri-rsvp-frr
>     (see/**/https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02/*
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec-2D02&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=wfWRjYko2S0Ze3RznOMyQDWN2koviAgzgwPJxbJ-Dp8&s=kDHxZ7eLH490Pyb0NhegZ97C6I3bL5hz2gAZIrqt3nU&e=>*/)
>     in the context of RFC 4090 facility FRR. The authors have
>     subsequently removed the line based on a comment that the TEAS
>     draft should be technology independent./*
>
>     */You point is valid and we will address this by making
>     draft-ietf-mpls-ri-rsvp-frr semantically update the RI-RSVP flag
>     in the context of RFC 4090 facility FRR. IOW
>     draft-ietf-mpls-ri-rsvp-frr updates
>     draft-ietf-teas-rsvp-te-scaling-rec./*
>
>
>     Section 4.5.2.2:
>
>     "- If node protection is requested and the Phop node does not
>     support the RI-RSVP-FRR extensions, then the node SHOULD reduce
>     the "refresh period" in TIME_VALUES object carried in PATH to
>     default value."
>
>     Was it meant RESV in place of PATH?
>
>     */[Chandra] TIME_VALUES object in both PATH and RESV should be
>     modified to carry short refresh interval. This is illustrated in
>     the following portion of an LSP./*
>
>     *//*
>
>     */… R11 ---- R12 --- R13 ---/*
>
>     *//*
>
>     */R11 does not support RI-RSVP whereas R12 and R13 do. If R12 did
>     not use short refresh interval for signaling PATH messages to R13,
>     then on R13 there will be disparity between the refresh periods of
>     primary PATH arriving from R12 and the backup LSP PATH arriving
>     from R11 after any failure. The benefits of long refresh would
>     anyway be lost once R11 signals backup PATH to R13. Hence, instead
>     of requiring R13 to handle the switch from long to short refresh
>     after a failure in the network, it is recommended to have the
>     refresh periods consistent across failures./*
>
>     *//*
>
>     */In summary, if there is a router not supporting RI-RSVP in the
>     network, then the “impact” radius will be (a) one in both upstream
>     & downstream directions along with LSP path for LSPs requesting
>     link protection, and (b) two in both upstream & downstream
>     directions along with LSP path for LSPs requesting node protection./*
>
>     *//*
>
>     */Thanks,/*
>
>     */Chandra./*
>
>
>     Thank you.
>
>     29.01.2018 16:40, Chandrasekar Ramachandran пишет:
>
>         Hi Alexander,
>
>         RI-RSVP-FRR specification does not remove the backup LSP
>         signaling but only uses B-SFRR association to enable the PLR
>         to signal availability of local protection to the
>         corresponding Merge Point (MP). The MP does not carry B-SFRR
>         association back to the PLR for the actual FRR summarization.
>         RI-RSVP-FRR aims to remove the dependencies that facility FRR
>         has on a short refresh interval. So, with these extensions the
>         LSP states on the Merge Point can remain long enough to ensure
>         that PLR is not time constrained to schedule backup LSP
>         signaling immediately.
>
>         Your comment/question though is relevant to the actual FRR
>         summarization (i.e. summary-frr draft) where the PLR does not
>         have to send the entire backup LSP Path message to the MP
>         after the failure.
>
>         Thanks,
>
>         Chandra.
>
>         *From:*mpls [mailto:mpls-bounces@ietf.org]*On Behalf
>         Of*Alexander Okonnikov
>         *Sent:*Saturday, January 27, 2018 3:25 AM
>         *To:*Mike Taillon (mtaillon)<mtaillon@cisco.com>
>         <mailto:mtaillon@cisco.com>
>         *Cc:*mpls@ietf.org <mailto:mpls@ietf.org>;mpls-chairs@ietf.org
>         <mailto:mpls-chairs@ietf.org>
>         *Subject:*Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
>         Hi,
>
>         What about signaling of MTU, which in regular facility FRR is
>         conveyed in ADSPEC within Path of backup LSP. Per my
>         understanding with proposed solution this information is being
>         lost. Maybe it could be done by signaling MTU in
>         SUMMARY_FRR_BYPASS object and specifying procedure for MP
>         regarding modifying ADSPEC objects of the protected LSPs.
>
>         Thank you.
>
>
>
>
>
>             26 янв. 2018 г., в 20:04, Mike Taillon (mtaillon)
>             <mtaillon@cisco.com <mailto:mtaillon@cisco.com>> написал(а):
>
>             I have reviewed the latest version of this document and
>             believe this is ready to progress to the next stage.
>
>             Regards,
>
>             -Mike (as a contributor)
>
>                 On Jan 10, 2018, at 9:56 AM,N.Leymann@telekom.de
>                 <mailto:N.Leymann@telekom.de>wrote:
>
>                 Working Group,
>
>                 This is to initiate a two week MPLS working group last
>                 call in on
>
>                 draft-ietf-mpls-ri-rsvp-frr-02.
>
>                 Please send your comments to the mpls wg mailing list
>                 (mpls@ietf.org <mailto:mpls@ietf.org>).
>
>                 Please note that there is already one IPR disclosed
>                 for the individual
>
>                 document:
>
>                 https://datatracker.ietf.org/ipr/2580/
>                 <https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_ipr_2580_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=eW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&s=7c5J69aODGQPWNcc2zevUqG2W0dlgUrPv5fFe-BbGl4&e=>
>
>                 All the authors and contributors have stated on the
>                 working group
>
>                 mailing list that they are not aware of any other IPRs
>                 that relates to
>
>                 this document.
>
>                 As with any WGLC, working group participants are
>                 requested to read
>
>                 the document and comment. If you feel that the
>                 document is ready
>
>                 for publication, it is appropriate to respond to the
>                 WGLC with a short
>
>                 and simple email indicating support.
>
>                 This working group last call ends January 24th, 2018.
>
>                 Regards
>
>                 Nic
>
>                 _______________________________________________
>                 mpls mailing list
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    <p>Hi Chandra,</p>
    <p><br>
    </p>
    <p>Please, see inline.</p>
    <p><br>
    </p>
    <p>Thank you.<br>
    </p>
    <br>
    <div class="moz-cite-prefix">26.02.2018 17:51, Chandrasekar
      Ramachandran пишет:<br>
    </div>
    <blockquote type="cite"
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      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
            Alexander,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Sorry
            about the delay in responding. Please see inline. If the
            proposed modifications are acceptable, then I will make the
            update in the next version soon.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Chandra.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
                    style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                  Alexander Okonnikov
                  [<a class="moz-txt-link-freetext" href="mailto:alexander.okonnikov@gmail.com">mailto:alexander.okonnikov@gmail.com</a>]
                  <br>
                  <b>Sent:</b> Sunday, February 11, 2018 12:03 AM<br>
                  <b>To:</b> Chandrasekar Ramachandran
                  <a class="moz-txt-link-rfc2396E" href="mailto:csekar@juniper.net">&lt;csekar@juniper.net&gt;</a><br>
                  <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:mpls-chairs@ietf.org">mpls-chairs@ietf.org</a>; Vishnu
                  Pavan Beeram <a class="moz-txt-link-rfc2396E" href="mailto:vbeeram@juniper.net">&lt;vbeeram@juniper.net&gt;</a><br>
                  <b>Subject:</b> Re: [mpls] WGLC for
                  draft-ietf-mpls-ri-rsvp-frr-02<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">Hi Chandra,<o:p></o:p></p>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">My comments inline.<o:p></o:p></p>
            <div>
              <p class="MsoNormal"><br>
                <br>
                <o:p></o:p></p>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <p class="MsoNormal">8 февр. 2018 г., в 21:49,
                    Chandrasekar Ramachandran &lt;<a
                      href="mailto:csekar@juniper.net"
                      moz-do-not-send="true">csekar@juniper.net</a>&gt;
                    написал(а):<o:p></o:p></p>
                </div>
                <p class="MsoNormal"><o:p> </o:p></p>
                <div>
                  <div>
                    <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
                        Alexander,</span><o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Please
                        refer to my responses inline.</span><o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                  </div>
                  <div style="border:none;border-left:solid blue
                    1.5pt;padding:0in 0in 0in 4.0pt">
                    <div>
                      <div style="border:none;border-top:solid #E1E1E1
                        1.0pt;padding:3.0pt 0in 0in 0in">
                        <div>
                          <p class="MsoNormal" style="background:white"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
                              class="apple-converted-space"><span
                                style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span></span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Alexander
                              Okonnikov [</span><a
                              href="mailto:alexander.okonnikov@gmail.com"
                              moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mailto:alexander.okonnikov@gmail.com</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">]<span
                                class="apple-converted-space"> </span><br>
                              <b>Sent:</b><span
                                class="apple-converted-space"> </span>Monday,
                              January 29, 2018 7:31 PM<br>
                              <b>To:</b><span
                                class="apple-converted-space"> </span>Chandrasekar
                              Ramachandran &lt;</span><a
                              href="mailto:csekar@juniper.net"
                              moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">csekar@juniper.net</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;;
                              Mike Taillon (mtaillon) &lt;</span><a
                              href="mailto:mtaillon@cisco.com"
                              moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mtaillon@cisco.com</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;<br>
                              <b>Cc:</b><span
                                class="apple-converted-space"> </span></span><a
                              href="mailto:mpls@ietf.org"
                              moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;<span
                                class="apple-converted-space"> </span></span><a
                              href="mailto:mpls-chairs@ietf.org"
                              moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls-chairs@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
                              <b>Subject:</b><span
                                class="apple-converted-space"> </span>Re:
                              [mpls] WGLC for
                              draft-ietf-mpls-ri-rsvp-frr-02</span><o:p></o:p></p>
                        </div>
                      </div>
                    </div>
                    <div>
                      <p class="MsoNormal" style="background:white"> <o:p></o:p></p>
                    </div>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">Hi
                      Chandra,<o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">I'm
                      sorry. Yes, I mixed these two drafts. Follow is my
                      comments for draft-ietf-mpls-ri-rsvp-frr-02:<o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">Section
                      2:<br>
                      <br>
                      "NP-MP node: Merger Point router at the tail of
                      Node-protecting bypass tunnel."<br>
                      <br>
                      Merger -&gt; Merge<br>
                      <br>
                      <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            I will fix this in the next version of the
                            draft.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                      Section 4.1.1:<br>
                      <br>
                      "If the NP-MP in a different area has not included
                      NodeID in RRO, then the PLR SHOULD use NP-MP's
                      interface address present in the RRO."<br>
                      <br>
                      It would cause for NodeID-based adjacency and
                      bypass tunnel to be broken in case of Nhop node
                      failure.<o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            Inclusion of NodeID in RRO is a SHOULD
                            clause in the draft.</span></i></b><o:p></o:p></p>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New&quot;">    - <span
                            class="apple-converted-space"> </span><span
                            style="color:#0070C0">The PLR SHOULD also
                            include its router ID in a NodeID sub-object</span></span><o:p></o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier
                          New&quot;;color:#0070C0">      in PATH RRO
                          unless configured explicitly not to include
                          NodeID.</span><o:p></o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier
                          New&quot;;color:#0070C0">      While including
                          its router ID in the NodeID sub-object carried
                          in</span><o:p></o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier
                          New&quot;;color:#0070C0">      the outgoing
                          Path message, the PLR MUST include the NodeID
                          sub-</span><o:p></o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier
                          New&quot;;color:#0070C0">      object after
                          including its IPv4/IPv6 address or unnumbered</span><o:p></o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier
                          New&quot;;color:#0070C0">      interface ID
                          sub-object.</span><o:p></o:p></p>
                    </div>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">So
                            the condition you have pointed out is the
                            case that may occur if the PLR is explicitly
                            configured by policy not to include NodeID
                            in the RRO. It should also be noted that
                            even if PLR is configured not to include
                            NodeID in RRO, the PLR can offer protection
                            for the following failures.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-indent:-.25in;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">1.</span></i></b><span
                        style="font-size:7.0pt;color:#0070C0">      <span
                          class="apple-converted-space"> </span></span><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">PLR
                            nhop link failure</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-indent:-.25in;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">2.</span></i></b><span
                        style="font-size:7.0pt;color:#0070C0">      <span
                          class="apple-converted-space"> </span></span><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Nhop
                            node control plane failures that do not
                            automatically result in LoS at the NP-MP</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Hence,
                            the draft does not specify inclusion of
                            NodeID as a MUST condition.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><o:p> </o:p></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal">Here I said about not inclusion of
                  NodeID by MP in RESV RRO, not by PLR.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal">Per RFC 4090, backup LSP cannot
                  traverse protected node and/or link. In many cases
                  link between protected node and MP will also be
                  protected link (as part of protected node). Unless
                  MP's phop link is LAN, and backup LSP's upstream hop
                  is on the same LAN and different from protected node,
                  backup LSP will be broken in case of node failure.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
                <pre><b><i><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra] How about changing the paragraph to the following?<o:p></o:p></span></i></b></pre>
                <pre><b><i><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></i></b></pre>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    -  While selecting the destination
                    address of the bypass LSP, the<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">     PLR SHOULD select the router ID of
                    the NNhop or Nhop node set<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      in the NodeID sub-object included
                    in RRO of RESV. If the MP has<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      not included NodeID sub-object in
                    RESV RRO and if the PLR and
                    <o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      the MP are in same area, then the
                    PLR may utilize the TED to
                    <o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      determine the router ID from the
                    interface address in RRO. If the<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      NP-MP in a different area has not
                    included NodeID in RRO, then the<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      PLR SHOULD NOT execute the
                    procedures specified in this document
                    <o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      because the PLR cannot reliably
                    determine an MP address that does<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">      not share fate of the protected
                    LSP.<o:p></o:p></span></p>
                <pre><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></pre>
                <pre><b><i><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The above text in effect recommends a router always include its NodeID sub-object in the RRO object carried in PATH as well as RESV message – as one of additional recommendations over RFC 4090 to support FRR with RI-RSVP. Please see next response.</span></i></b><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></pre>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    I am OK with this change.<br>
    <blockquote type="cite"
cite="mid:CY1PR0501MB1388F505FF91FDB7AF1817A6D9C10@CY1PR0501MB1388.namprd05.prod.outlook.com">
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        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
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            <div>
              <div>
              </div>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <div style="border:none;border-left:solid blue
                    1.5pt;padding:0in 0in 0in 4.0pt">
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                      Section 4.1.3:<br>
                      <br>
                      "In addition to the above procedures, the node
                      SHOULD check the presence of remote signaling
                      adjacency with PLR. If a matching Bypass Summary
                      FRR Extended Association object is found in the
                      PATH and if the RSVP-TE signaling adjacency is
                      also present, then the node concludes that the PLR
                      will undertake refresh-interval independent FRR
                      procedures specified in this document."<br>
                      <br>
                      What if PLR implements Summary FRR, but doesn't
                      support RI-RSVP and has established signaling
                      adjacency for purpose other than RI-RSVP? Should
                      not MP analyze I-bit in NodeID-based Hello message
                      from PLR, like PLR does for NodeID Hello messages
                      received from MP?<br>
                      <br>
                      <br>
                      <o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            I will modify the first sentence as the one
                            below:</span></i></b><o:p></o:p></p>
                    <pre style="background:white">    <span style="color:#0070C0">In addition to the above procedures, the node SHOULD check the</span><o:p></o:p></pre>
                    <pre style="background:white"><span style="color:#0070C0">    presence of remote signaling adjacency with RI-RSVP capable [TE-SCALE-REC] PLR.</span><o:p></o:p></pre>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                      <br>
                      "If the PLR has included NodeID sub-object in PATH
                      RRO, then that NodeID is the remote neighbor
                      address. Otherwise, the PLR's interface address in
                      PATH RRO will be the remote neighbor address."<br>
                      <br>
                      Maybe it should be said: "Otherwise, the address
                      from Bypass_Source_IPv4_Address field of Bypass
                      Summary FRR Extended Association object will be
                      the remote neighbor address"? If not then in this
                      case PLR will use another address (different from
                      its one in RRO) as source for its bypass tunnel
                      such that MP will not be able to match two
                      interface addresses (one for remote neighbor
                      address from RRO and another for bypass source
                      address) of PLR in order to perform matching of
                      Bypass Summary FRR Extended Association to NodeID
                      hello adjacency. Also, if MP will use PLR's
                      interface address from RRO, NodeID session
                      probably will be broken in case of Nhop link/node
                      failure on PLR.<br>
                      <br>
                      <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            It should be noted that if the PLR and the
                            MP are in the same IGP area, the
                            Bypass_source_IPv4_address field B-SFRR
                            extended association object may also be an
                            interface address (Of course, the interface
                            address that PLR uses as the source address
                            of the bypass tunnel will be different from
                            the protected interface address – otherwise
                            basic FRR will itself break). In such a
                            case, the MP may utilize the TED to
                            determine whether the
                            Bypass_source_IPv4_address corresponds to
                            the same node as the content of the node-id
                            sub-object included by the PLR. I will add
                            the following text to this paragraph to
                            clarify this.</span></i></b><o:p></o:p></p>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    In addition to the above procedures, the node SHOULD check the</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    presence of remote signaling adjacency with PLR. If a matching</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    Bypass Summary FRR Extended Association object is found in the PATH</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    and if the RSVP-TE signaling adjacency is also present, then the</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    node concludes that the PLR will undertake refresh-interval</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    independent FRR procedures specified in this document. If the PLR</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    has included NodeID sub-object in PATH RRO, then that NodeID is the</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    remote neighbor address. Otherwise, the PLR's interface address in</span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    PATH RRO will be the remote neighbor address. <b><u>In order to enable</u></b></span><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    the MP to match the bypass source address in B-SFRR Extended </span></u></b><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    Association object with the RSVP-TE signaling adjacency with the</span></u></b><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    PLR, the bypass source address in B-SFRR Extended Association object</span></u></b><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    should either be (a) the same as the PLR’s address used for Hello</span></u></b><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    messages of RSVP-TE signaling adjacency or, (b) attached on the same</span></u></b><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    node on TED as the PLR’s address used for Hello messages of RSVP-TE</span></u></b><o:p></o:p></pre>
                    <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    signaling adjacency.</span></u></b><o:p></o:p></pre>
                    <div>
                      <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   </span><o:p></o:p></p>
                    </div>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><o:p> </o:p></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal">What about follow sentence?
                  "Otherwise, the PLR's interface address in PATH RRO
                  will be the remote neighbor address."<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal">If the PLR has been established
                  adjacency from its IP address that is present in PATH
                  RRO (i.e. IP address of protected link), then after
                  failure the adjacency will be broken. As a result, MP
                  will remove normal and remote path state.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal">My point here is that PLR must not
                  establish NodeID hello session using IP address of
                  protected link.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra]
                        Yes, I will remove that sentence. How about the
                        following as the opening paragraphs under
                        Section 4.1.3?<o:p></o:p></span></i></b></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></i></b></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    With regard to the MP procedures that
                    are specified in<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">   
                    <a href="https://tools.ietf.org/html/rfc4090"
                      moz-do-not-send="true">RFC 4090</a>, this document
                    specifies the following additional
                    <o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    procedures.<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;"><o:p> </o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    Each router supporting this document
                    SHOULD also include its
                    <o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    router ID in a NodeID sub-object in
                    RRO object carried in the<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    RESV message unless configured
                    explicitly not to include NodeID.<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    If the router does not include NodeID
                    in RESV RRO and if the<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    PLR is in a different IGP area, then
                    the router SHOULD NOT
                    <o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    execute the MP procedures specified
                    in this document.<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;"><o:p> </o:p></span></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The
                        above text is the counterpart for the proposed
                        text for PLR procedures (in addition to RFC 4090
                        procedures) in the previous response above.</span></i></b></p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <i><b>OK.</b></i><br>
    <blockquote type="cite"
cite="mid:CY1PR0501MB1388F505FF91FDB7AF1817A6D9C10@CY1PR0501MB1388.namprd05.prod.outlook.com">
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        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
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          <div>
            <div>
              <div>
                <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></p>
              </div>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <div style="border:none;border-left:solid blue
                    1.5pt;padding:0in 0in 0in 4.0pt">
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;margin-bottom:12.0pt;background:white">
                      Section 4.4.2:<br>
                      <br>
                      "When a router that has already made NP available
                      detects a change in the RRO carried in RESV
                      message, and if the RRO change indicates that the
                      router's former NP-MP is no longer present in the
                      LSP path, then the router SHOULD send "Remote"
                      PathTear directly to its former NP-MP."<br>
                      <br>
                      What if MP doesn't signal its NodeID in Resv RRO,
                      and PLR and MP are in different areas? In this
                      case it could be that "old" and "new" NNhops in
                      fact are the same node.<br>
                      <br>
                      <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            This has already been discussed at length in
                            Section 4.1.1 itself (on how to select the
                            destination address for bypass LSP) and will
                            only be a repetition in Section 4.4.2.<span
                              class="apple-converted-space"> </span></span></i></b><o:p></o:p></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal">I feel that I need to provide
                  example here. R1 and R3 are in different areas, R2 and
                  R4 are ABRs. R3 doesn't insert its NodeID in RESV RRO.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-family:&quot;Courier New&quot;">R1-----R2-----R3</span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-family:&quot;Courier New&quot;"> |    
                     |     |</span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
                    style="font-family:&quot;Courier New&quot;"> +-----R4-----+</span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal">Before failure R1 receives RESV RRO
                  that contains R3's R3-&gt;R2 address. Then link R2-R3
                  had been broken, and R2 has activated FRR and signaled
                  backup LSP R2-R4-R3. As a result R1 now receives RESV
                  RRO with R3's R3-&gt;R4 address. As soon as R3's
                  R3-&gt;R2 address is not present in RESV RRO, R1
                  concludes that R3 is not present on LSP path anymore.
                  Hence it sends remote PathTear to R3.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra]
                        The backup LSP PATH is from a different Sender
                        and is a logically separate state (though tied
                        to the primary PATH). Hence R2 should not send
                        remote PathTear to R3. You have made a good
                        point because that is somewhat unclear in the
                        draft. Would the following text in Section 4.4.2
                        clarify this?</span></i></b></p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <i><b>I was talking about sending remote PathTear by R1, not by R2.
        Before failure R1 is receiving Resv RRO as R3'-R2. After failure
        and signaling backup LSP by R2 it is receiving Resv RRO
        R3''-R4-R2. Here R3' is IP address of R3 on interface R3-&gt;R2
        and R3'' is IP address of R3 on interface R3-R4. If R3 is not
        inserting NodeID in Resv RRO, R1 can't understand that R3' and
        R3'' are both the same node (R3).<br>
      </b></i>
    <blockquote type="cite"
cite="mid:CY1PR0501MB1388F505FF91FDB7AF1817A6D9C10@CY1PR0501MB1388.namprd05.prod.outlook.com">
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            <div>
              <div>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></i></b></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></i></b></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    When a router that has already made
                    NP available detects a change in<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    the RRO carried in RESV message, and
                    if the RRO change indicates<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    that the router's former NP-MP is no
                    longer present in the LSP path,<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    then the router SHOULD send "Remote"
                    PathTear directly to its former<o:p></o:p></span></p>
                <p class="MsoNormal"><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;">    NP-MP.
                    <b><u>However, the change in RRO carried in backup
                        LSP RESV message<o:p></o:p></u></b></span></p>
                <p class="MsoNormal"><b><u><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;">    that a router detects during
                        local repair actions must be handled as<o:p></o:p></span></u></b></p>
                <p class="MsoNormal"><b><u><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;">    per RFC 4090.</span></u></b><span
                    style="font-size:10.0pt;font-family:&quot;Courier
                    New&quot;"><o:p></o:p></span></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></i></b></p>
                <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal">My point here is that PLR can use
                  this procedure, unless NP-MP is in different area and
                  doesn't insert its NodeID in RESV RRO. I.e. in this
                  case PLR is not able to identify whether new and old
                  NNhops are the same node or two different ones.<o:p></o:p></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></i></b></p>
                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra]
                        The clarifying text above should address the
                        confusion?
                      </span></i></b></p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
    <i><b>Not specific to this section, but to the whole draft itself.
        May be it would be better near beginning of the draft to state
        as a prerequisite that all LSRs must include their NodeID into
        Path and Resv RROs, unless they could determine NodeID of each
        other by some other means. Otherwise the solution must not be
        utilized. Then in the body of the draft to omit cases when PLR
        and/or MP are not including their NodeID. Also, removing cases
        when remote adjacency is being established on non-NodeID
        addresses will avoid establishing of multiple remote adjacencies
        between a pair of LSRs.</b></i><br>
    <blockquote type="cite"
cite="mid:CY1PR0501MB1388F505FF91FDB7AF1817A6D9C10@CY1PR0501MB1388.namprd05.prod.outlook.com">
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                <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></i></b></p>
              </div>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <div style="border:none;border-left:solid blue
                    1.5pt;padding:0in 0in 0in 4.0pt">
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                      Section 4.5.2.1:<br>
                      <br>
                      It is clear that if neighbor doesn't signal I-bit
                      then it doesn't support RI-RSVP-FRR. But what if
                      it signals I-bit? It could mean that it supports
                      RI-RSVP, but not RI-RSVP-FRR. Particularly, it
                      could be that downstream neighbor doesn't support
                      Conditional PathTear, and thus will treat
                      Conditional PathTear as normal one.<br>
                      <br>
                      <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            As explained in Section 3, there are gaps in
                            introducing refresh-interval independence to
                            RFC 4090 facility FRR. Hence, if an
                            implementation has to support both RFC 4090
                            facility FRR and RI-RSVP, then this draft
                            should also be supported. In other words,
                            the RI-RSVP flag means both draft in the
                            context RFC 4090 facility FRR.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Previously,
                            draft-ietf-teas-rsvp-te-scaling-rec
                            (RI-RSVP) used to have text in Section 3
                            that mandated the support of
                            draft-ietf-mpls-ri-rsvp-frr (see</span></i></b><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec-2D02&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=wfWRjYko2S0Ze3RznOMyQDWN2koviAgzgwPJxbJ-Dp8&amp;s=kDHxZ7eLH490Pyb0NhegZ97C6I3bL5hz2gAZIrqt3nU&amp;e="
                        moz-do-not-send="true"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02</span></i></b></a><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">)
                            in the context of RFC 4090 facility FRR. The
                            authors have subsequently removed the line
                            based on a comment that the TEAS draft
                            should be technology independent.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">You
                            point is valid and we will address this by
                            making draft-ietf-mpls-ri-rsvp-frr
                            semantically update the RI-RSVP flag in the
                            context of RFC 4090 facility FRR. IOW
                            draft-ietf-mpls-ri-rsvp-frr updates
                            draft-ietf-teas-rsvp-te-scaling-rec.</span></i></b><br>
                      <br>
                      <br>
                      Section 4.5.2.2:<br>
                      <br>
                      "- If node protection is requested and the Phop
                      node does not support the RI-RSVP-FRR extensions,
                      then the node SHOULD reduce the "refresh period"
                      in TIME_VALUES object carried in PATH to default
                      value."<br>
                      <br>
                      Was it meant RESV in place of PATH?<o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                            TIME_VALUES object in both PATH and RESV
                            should be modified to carry short refresh
                            interval. This is illustrated in the
                            following portion of an LSP.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">…
                            R11 ---- R12 --- R13 ---</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">R11
                            does not support RI-RSVP whereas R12 and R13
                            do. If R12 did not use short refresh
                            interval for signaling PATH messages to R13,
                            then on R13 there will be disparity between
                            the refresh periods of primary PATH arriving
                            from R12 and the backup LSP PATH arriving
                            from R11 after any failure. The benefits of
                            long refresh would anyway be lost once R11
                            signals backup PATH to R13. Hence, instead
                            of requiring R13 to handle the switch from
                            long to short refresh after a failure in the
                            network, it is recommended to have the
                            refresh periods consistent across failures.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">In
                            summary, if there is a router not supporting
                            RI-RSVP in the network, then the “impact”
                            radius will be (a) one in both upstream
                            &amp; downstream directions along with LSP
                            path for LSPs requesting link protection,
                            and (b) two in both upstream &amp;
                            downstream directions along with LSP path
                            for LSPs requesting node protection.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Thanks,</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Chandra.</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="margin-bottom:12.0pt;background:white"><br>
                      Thank you.<o:p></o:p></p>
                    <div>
                      <div>
                        <p class="MsoNormal" style="background:white">29.01.2018
                          16:40, Chandrasekar Ramachandran пишет:<o:p></o:p></p>
                      </div>
                    </div>
                    <blockquote
                      style="margin-top:5.0pt;margin-bottom:5.0pt">
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
                            Alexander,</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">RI-RSVP-FRR
                            specification does not remove the backup LSP
                            signaling but only uses B-SFRR association
                            to enable the PLR to signal availability of
                            local protection to the corresponding Merge
                            Point (MP). The MP does not carry B-SFRR
                            association back to the PLR for the actual
                            FRR summarization. RI-RSVP-FRR aims to
                            remove the dependencies that facility FRR
                            has on a short refresh interval. So, with
                            these extensions the LSP states on the Merge
                            Point can remain long enough to ensure that
                            PLR is not time constrained to schedule
                            backup LSP signaling immediately.</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Your
                            comment/question though is relevant to the
                            actual FRR summarization (i.e. summary-frr
                            draft) where the PLR does not have to send
                            the entire backup LSP Path message to the MP
                            after the failure.</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Thanks,</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Chandra.</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                      </div>
                      <div style="border:none;border-left:solid blue
                        1.5pt;padding:0in 0in 0in 4.0pt">
                        <div>
                          <div style="border:none;border-top:solid
                            #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
                            <div>
                              <p class="MsoNormal"
                                style="background:white"><b><span
                                    style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
                                  class="apple-converted-space"><span
                                    style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span></span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mpls
                                  [</span><a
                                  href="mailto:mpls-bounces@ietf.org"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mailto:mpls-bounces@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">]<span
                                    class="apple-converted-space"> </span><b>On
                                    Behalf Of<span
                                      class="apple-converted-space"> </span></b>Alexander
                                  Okonnikov<br>
                                  <b>Sent:</b><span
                                    class="apple-converted-space"> </span>Saturday,
                                  January 27, 2018 3:25 AM<br>
                                  <b>To:</b><span
                                    class="apple-converted-space"> </span>Mike
                                  Taillon (mtaillon)<span
                                    class="apple-converted-space"> </span></span><a
                                  href="mailto:mtaillon@cisco.com"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">&lt;mtaillon@cisco.com&gt;</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
                                  <b>Cc:</b><span
                                    class="apple-converted-space"> </span></span><a
                                  href="mailto:mpls@ietf.org"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;<span
                                    class="apple-converted-space"> </span></span><a
                                  href="mailto:mpls-chairs@ietf.org"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls-chairs@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
                                  <b>Subject:</b><span
                                    class="apple-converted-space"> </span>Re:
                                  [mpls] WGLC for
                                  draft-ietf-mpls-ri-rsvp-frr-02</span><o:p></o:p></p>
                            </div>
                          </div>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"> <o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white">Hi,<o:p></o:p></p>
                        </div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"> <o:p></o:p></p>
                          </div>
                        </div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white">What about
                              signaling of MTU, which in regular
                              facility FRR is conveyed in ADSPEC within
                              Path of backup LSP. Per my understanding
                              with proposed solution this information is
                              being lost. Maybe it could be done by
                              signaling MTU in SUMMARY_FRR_BYPASS object
                              and specifying procedure for MP regarding
                              modifying ADSPEC objects of the protected
                              LSPs.<o:p></o:p></p>
                          </div>
                        </div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"> <o:p></o:p></p>
                          </div>
                        </div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white">Thank you.<o:p></o:p></p>
                          </div>
                          <div>
                            <div>
                              <p class="MsoNormal"
                                style="background:white"><br>
                                <br>
                                <br>
                                <br>
                                <o:p></o:p></p>
                            </div>
                            <blockquote
                              style="margin-top:5.0pt;margin-bottom:5.0pt">
                              <div>
                                <div>
                                  <p class="MsoNormal"
                                    style="background:white">26 янв.
                                    2018 г., в 20:04, Mike Taillon
                                    (mtaillon) &lt;<a
                                      href="mailto:mtaillon@cisco.com"
                                      moz-do-not-send="true"><span
                                        style="color:purple">mtaillon@cisco.com</span></a>&gt;
                                    написал(а):<o:p></o:p></p>
                                </div>
                              </div>
                              <div>
                                <p class="MsoNormal"
                                  style="background:white"> <o:p></o:p></p>
                              </div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="margin-bottom:12.0pt;background:white">I
                                        have reviewed the latest version
                                        of this document and believe
                                        this is ready to progress to the
                                        next stage.<o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="background:white">Regards,<o:p></o:p></p>
                                    </div>
                                  </div>
                                  <div>
                                    <p class="MsoNormal"
                                      style="background:white">-Mike (as
                                      a contributor)<span
                                        class="apple-converted-space"> </span><o:p></o:p></p>
                                  </div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="background:white"> <o:p></o:p></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="background:white"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <blockquote
                                        style="margin-top:5.0pt;margin-bottom:5.0pt">
                                        <div>
                                          <div>
                                            <p class="MsoNormal"
                                              style="background:white">On
                                              Jan 10, 2018, at 9:56 AM,<span
class="apple-converted-space"> </span><a
                                                href="mailto:N.Leymann@telekom.de"
                                                moz-do-not-send="true"><span
                                                  style="color:purple">N.Leymann@telekom.de</span></a><span
class="apple-converted-space"> </span>wrote:<o:p></o:p></p>
                                          </div>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="background:white"> <o:p></o:p></p>
                                        </div>
                                        <div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Working
                                                  Group,</span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This
                                                  is to initiate a two
                                                  week MPLS working
                                                  group last call in on<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">draft-ietf-mpls-ri-rsvp-frr-02.</span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Please
                                                  send your comments to
                                                  the mpls wg mailing
                                                  list (</span><a
                                                  href="mailto:mpls@ietf.org"
                                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">).</span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Please
                                                  note that there is
                                                  already one IPR
                                                  disclosed for the
                                                  individual<span
                                                    class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">document:</span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_ipr_2580_&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=eW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&amp;s=7c5J69aODGQPWNcc2zevUqG2W0dlgUrPv5fFe-BbGl4&amp;e="
                                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">https://datatracker.ietf.org/ipr/2580/</span></a><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">All
                                                  the authors and
                                                  contributors have
                                                  stated on the working
                                                  group<span
                                                    class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mailing
                                                  list that they are not
                                                  aware of any other
                                                  IPRs that relates to<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">this
                                                  document.<span
                                                    class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">As
                                                  with any WGLC, working
                                                  group participants are
                                                  requested to read<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">the
                                                  document and comment.
                                                  If you feel that the
                                                  document is ready<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">for
                                                  publication, it is
                                                  appropriate to respond
                                                  to the WGLC with a
                                                  short<span
                                                    class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">and
                                                  simple email
                                                  indicating support.<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This
                                                  working group last
                                                  call ends January
                                                  24th, 2018.</span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Regards</span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"><span
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                                              <p class="MsoNormal"
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                                            <p class="MsoNormal"
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--------------77046464CC7ED43721E90765--


From nobody Wed Feb 28 07:52:54 2018
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Date: Wed, 28 Feb 2018 23:52:46 +0800
From: Lizhong Jin <lizho.jin@gmail.com>
To: Loa Andersson <loa@pi.nu>, mpls <mpls@ietf.org>
Cc: Sam Aldrin <aldrin.ietf@gmail.com>, Mach Chen <mach.chen@huawei.com>, "=?utf-8?Q?Bocci=2C_Matthew_(Nokia_-_GB)?=" <matthew.bocci@nokia.com>, "=?utf-8?Q?draft-farrel-mpls-sfc=40ietf.org?=" <draft-farrel-mpls-sfc@ietf.org>, "=?utf-8?Q?mpls-chairs=40ietf.org?=" <mpls-chairs@ietf.org>
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Subject: Re: [mpls] MPLS-RT review of draft-farrel-mpls-sfc
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From: Chandrasekar Ramachandran <csekar@juniper.net>
To: Alexander Okonnikov <alexander.okonnikov@gmail.com>
CC: "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, Vishnu Pavan Beeram <vbeeram@juniper.net>
Thread-Topic: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/bEMjBDpQwjj-aG8qNIxig7Oocfc>
Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/PEVAXSslZMGCf2_4BLIORVYbcZk>
Subject: Re: [mpls] MPLS-RT review of draft-farrel-mpls-sfc
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Thanks Lizhong,
=20
We could certainly look at adding more discussion on the scope of =
applicability. We don't want to get into a competitive discussion wrt =
NSH, but since NSH naturally has more functionality, we could highlight =
what you cannot do in MPLS.
=20
I'm curious about your implementation. You say "using per-packet =
metadata (strictly saying, it is per-flow)". What I read there is that =
the metadata for packets on a flow was constant, but that you had =
multiple flows mixed together so that an SF that received a packet =
looked at the metadata carried by the packet rather than hashing to find =
the flow and then looking up the metadata. Do I have this right?
=20
If I have understood you, then this is the same as the function in MPLS =
although there is an additional indirection. That is, each packet can =
carry a pointer to its per flow metadata allowing multiple flows to be =
mixed and avoiding the need for an SF to have to work out the specific =
flow through hashing.=20
=20
However, true per-packet metadata allows the value of the metadata to =
vary on every packet. An example of this might be a CRC on the packet. =
NSH supports this, but our proposal does not.
=20
Cheers,
Adrian
=20
From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Lizhong Jin
Sent: 28 February 2018 15:53
To: Loa Andersson; mpls
Cc: draft-farrel-mpls-sfc@ietf.org; mpls-chairs@ietf.org
Subject: Re: [mpls] MPLS-RT review of draft-farrel-mpls-sfc
=20
Hi all,
This is an alternative for SFC implementation in MPLS network. Since it =
is WG adoption, not last call, basically I believe the document is ready =
for adoption.
And I have one concern to the solution regarding the metadata. There is =
no per packet metadata like NSH, which will surely bring some =
restriction to the applications. I know some SFC application even does =
not require metadata, but I did one development of SFC application using =
per-packet metadata (strictly saying, it is per-flow) which is of course =
not under MPLS infrastructure.
If possible, could authors add a section to describe what kind of =
capability this approach could achieve, and what could not compared with =
NSH. With that context, the operators could understand better, and =
easier to decide which solution to deploy.
=20
Regards
Lizhong
On 2/3/2018 14:02=EF=BC=8C <mailto:loa@pi.nu> Loa Andersson<loa@pi.nu> =
wrote=EF=BC=9A=20
Matthew, Lizhong, Sam, and Mach,

You have been selected as MPLS-RT reviewers for draft-farrel-mpls-sfc.

Note to authors: You have been CC'd on this email so that you can know
that this review is going on. However, please do not review your own
document.

Reviews should comment on whether the document is coherent, is it
useful (ie, is it likely to be actually useful in operational networks), =

and is the document technically sound?

We are interested in knowing whether the document is ready to be
considered for WG adoption (ie, it doesn't have to be perfect at this
point, but should be a good start). Please remember that it often is
easier to progress the document when it has become a working group
document. All comments in the MPLS-RT review needs to be addressed,
but please think carefully about whether a comment is gating the
adoption or could just as easily be addressed after the adoption.

Reviews should be sent to the document authors, WG co-chairs and WG
secretary, and CC'd to the MPLS WG email list. If necessary, comments
may be sent privately to only the WG chairs.

If you have technical comments you should try to be explicit about what
needs to be resolved before adopting it as a working group document, and
what can wait until the document is a working group document and the
working group has the revision control.

Are you able to review this draft by February 28, 2018? Please respond
whether you are available to do the review in a timely fashion.


Thanks, Loa
(as MPLS WG co-chair)
--=20


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Huawei Technologies (consultant)     phone: +46 739 81 21 64

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB link=3Dblue =
vlink=3Dpurple style=3D'tab-interval:36.0pt'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Thanks =
Lizhong,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>We could certainly look at =
adding more discussion on the scope of applicability. We don't want to =
get into a competitive discussion wrt NSH, but since NSH naturally has =
more functionality, we could highlight what you cannot do in =
MPLS.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>I'm curious about your =
implementation. You say &quot;using per-packet metadata (strictly =
saying, it is per-flow)&quot;. What I read there is that the metadata =
for packets on a flow was constant, but that you had multiple flows =
mixed together so that an SF that received a packet looked at the =
metadata carried by the packet rather than hashing to find the flow and =
then looking up the metadata. Do I have this =
right?<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>If I have understood you, then =
this is the same as the function in MPLS although there is an additional =
indirection. That is, each packet can carry a pointer to its per flow =
metadata allowing multiple flows to be mixed and avoiding the need for =
an SF to have to work out the specific flow through hashing. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>However, true per-packet =
metadata allows the value of the metadata to vary on every packet. An =
example of this might be a CRC on the packet. NSH supports this, but our =
proposal does not.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New =
Roman";color:#1F497D'>Cheers,<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Adrian<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New =
Roman";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=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-f=
ont-family:"Times New =
Roman";mso-ansi-language:EN-US'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-f=
ont-family:"Times New Roman";mso-ansi-language:EN-US'> mpls =
[mailto:mpls-bounces@ietf.org] <b>On Behalf Of </b>Lizhong =
Jin<br><b>Sent:</b> 28 February 2018 15:53<br><b>To:</b> Loa Andersson; =
mpls<br><b>Cc:</b> draft-farrel-mpls-sfc@ietf.org; =
mpls-chairs@ietf.org<br><b>Subject:</b> Re: [mpls] MPLS-RT review of =
draft-farrel-mpls-sfc<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New Roman"'>Hi all,<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New Roman"'>This is an alternative for SFC =
implementation in MPLS network.&nbsp;Since it is WG adoption, not last =
call, basically I believe the document is ready for =
adoption.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New Roman"'>And I have one concern to the solution =
regarding the metadata. There is no per packet metadata like NSH, which =
will surely bring some restriction to the applications. I know some SFC =
application even does not require metadata, but I did one development of =
SFC application using per-packet metadata (strictly saying, it is =
per-flow) which is of course not under MPLS =
infrastructure.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New Roman"'>If possible, could authors add a section to =
describe what kind of capability this approach could achieve, and what =
could not compared with NSH. With that context, the operators could =
understand better, and easier to decide which solution to =
deploy.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New Roman"'>Regards<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;mso-fareast-fon=
t-family:"Times New =
Roman"'>Lizhong<o:p></o:p></span></p></div></div><div =
style=3D'margin-top:33.75pt;margin-bottom:15.0pt;border-radius:3px;-moz-b=
order-radius:3px;-webkit-border-radius:3px'><div =
style=3D'margin-left:7.5pt;margin-right:7.5pt'><p class=3DMsoNormal =
style=3D'background:#F2F2F2;word-break:break-all'><span =
style=3D'font-size:9.0pt;font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91=
;mso-fareast-font-family:"Times New Roman";color:black'>On <span =
class=3Dmail-date>2/3/2018 14:02</span></span><span =
style=3D'font-size:9.0pt;font-family:"MS =
Mincho";mso-bidi-font-family:"MS =
Mincho";color:black'>=EF=BC=8C</span><span =
style=3D'font-size:9.0pt;font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91=
;mso-fareast-font-family:"Times New Roman";color:black'><a =
href=3D"mailto:loa@pi.nu"><span =
style=3D'color:#2A83F2;text-decoration:none;text-underline:none'>Loa =
Andersson&lt;loa@pi.nu&gt;</span></a> wrote</span><span =
style=3D'font-size:9.0pt;font-family:"MS =
Mincho";mso-bidi-font-family:"MS =
Mincho";color:black'>=EF=BC=9A</span><span =
style=3D'font-size:9.0pt;font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91=
;mso-fareast-font-family:"Times New Roman";color:black'> =
<o:p></o:p></span></p></div></div><blockquote id=3Dntes-pcmail-quote><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91=
;mso-fareast-font-family:"Times New Roman"'>Matthew, Lizhong, Sam, and =
Mach,<br><br>You have been selected as MPLS-RT reviewers for =
draft-farrel-mpls-sfc.<br><br>Note to authors: You have been CC'd on =
this email so that you can know<br>that this review is going on. =
However, please do not review your own<br>document.<br><br>Reviews =
should comment on whether the document is coherent, is it<br>useful (ie, =
is it likely to be actually useful in operational networks), <br>and is =
the document technically sound?<br><br>We are interested in knowing =
whether the document is ready to be<br>considered for WG adoption (ie, =
it doesn't have to be perfect at this<br>point, but should be a good =
start). Please remember that it often is<br>easier to progress the =
document when it has become a working group<br>document. All comments in =
the MPLS-RT review needs to be addressed,<br>but please think carefully =
about whether a comment is gating the<br>adoption or could just as =
easily be addressed after the adoption.<br><br>Reviews should be sent to =
the document authors, WG co-chairs and WG<br>secretary, and CC'd to the =
MPLS WG email list. If necessary, comments<br>may be sent privately to =
only the WG chairs.<br><br>If you have technical comments you should try =
to be explicit about what<br>needs to be resolved before adopting it as =
a working group document, and<br>what can wait until the document is a =
working group document and the<br>working group has the revision =
control.<br><br>Are you able to review this draft by February 28, 2018? =
Please respond<br>whether you are available to do the review in a timely =
fashion.<br><br><br>Thanks, Loa<br>(as MPLS WG co-chair)<br>-- =
<br><br><br>Loa Andersson =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;email: =
loa@pi.nu<br>Senior MPLS Expert<br>Huawei Technologies (consultant) =
&nbsp;&nbsp;&nbsp;&nbsp;phone: +46 739 81 21 =
64<o:p></o:p></span></p></blockquote></div></div></div></body></html>
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To: Chandrasekar Ramachandran <csekar@juniper.net>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, Vishnu Pavan Beeram <vbeeram@juniper.net>
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From: Alexander Okonnikov <alexander.okonnikov@gmail.com>
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Subject: Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
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Hi Chandra,


Inline.


28.02.2018 18:58, Chandrasekar Ramachandran пишет:
>
> Hi Alexander,
>
> Please see inline.
>
> Thanks,
>
> Chandra.
>
> *From:*Alexander Okonnikov [mailto:alexander.okonnikov@gmail.com]
> *Sent:* Wednesday, February 28, 2018 9:19 PM
> *To:* Chandrasekar Ramachandran <csekar@juniper.net>
> *Cc:* mpls@ietf.org; mpls-chairs@ietf.org; Vishnu Pavan Beeram 
> <vbeeram@juniper.net>
> *Subject:* Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
> Hi Chandra,
>
> Please, see inline.
>
> Thank you.
>
> 26.02.2018 17:51, Chandrasekar Ramachandran пишет:
>
>     Hi Alexander,
>
>     Sorry about the delay in responding. Please see inline. If the
>     proposed modifications are acceptable, then I will make the update
>     in the next version soon.
>
>     Thanks,
>
>     Chandra.
>
>     *From:*Alexander Okonnikov [mailto:alexander.okonnikov@gmail.com]
>     *Sent:* Sunday, February 11, 2018 12:03 AM
>     *To:* Chandrasekar Ramachandran <csekar@juniper.net>
>     <mailto:csekar@juniper.net>
>     *Cc:* mpls@ietf.org <mailto:mpls@ietf.org>; mpls-chairs@ietf.org
>     <mailto:mpls-chairs@ietf.org>; Vishnu Pavan Beeram
>     <vbeeram@juniper.net> <mailto:vbeeram@juniper.net>
>     *Subject:* Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
>     Hi Chandra,
>
>     My comments inline.
>
>
>
>
>         8 февр. 2018 г., в 21:49, Chandrasekar Ramachandran
>         <csekar@juniper.net <mailto:csekar@juniper.net>> написал(а):
>
>         Hi Alexander,
>
>         Please refer to my responses inline.
>
>         *From:*Alexander Okonnikov [mailto:alexander.okonnikov@gmail.com]
>         *Sent:*Monday, January 29, 2018 7:31 PM
>         *To:*Chandrasekar Ramachandran <csekar@juniper.net
>         <mailto:csekar@juniper.net>>; Mike Taillon (mtaillon)
>         <mtaillon@cisco.com <mailto:mtaillon@cisco.com>>
>         *Cc:*mpls@ietf.org <mailto:mpls@ietf.org>;mpls-chairs@ietf.org
>         <mailto:mpls-chairs@ietf.org>
>         *Subject:*Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
>         Hi Chandra,
>
>         I'm sorry. Yes, I mixed these two drafts. Follow is my
>         comments for draft-ietf-mpls-ri-rsvp-frr-02:
>
>         Section 2:
>
>         "NP-MP node: Merger Point router at the tail of
>         Node-protecting bypass tunnel."
>
>         Merger -> Merge
>
>         */[Chandra] I will fix this in the next version of the draft./*
>
>
>         Section 4.1.1:
>
>         "If the NP-MP in a different area has not included NodeID in
>         RRO, then the PLR SHOULD use NP-MP's interface address present
>         in the RRO."
>
>         It would cause for NodeID-based adjacency and bypass tunnel to
>         be broken in case of Nhop node failure.
>
>         */[Chandra] Inclusion of NodeID in RRO is a SHOULD clause in
>         the draft./*
>
>         - The PLR SHOULD also include its router ID in a NodeID sub-object
>
>               in PATH RRO unless configured explicitly not to include
>         NodeID.
>
>               While including its router ID in the NodeID sub-object
>         carried in
>
>               the outgoing Path message, the PLR MUST include the
>         NodeID sub-
>
>               object after including its IPv4/IPv6 address or unnumbered
>
>         interface ID sub-object.
>
>         */So the condition you have pointed out is the case that may
>         occur if the PLR is explicitly configured by policy not to
>         include NodeID in the RRO. It should also be noted that even
>         if PLR is configured not to include NodeID in RRO, the PLR can
>         offer protection for the following failures./*
>
>         */1./**/PLR nhop link failure/*
>
>         */2./**/Nhop node control plane failures that do not
>         automatically result in LoS at the NP-MP/*
>
>         */Hence, the draft does not specify inclusion of NodeID as a
>         MUST condition./*
>
>     Here I said about not inclusion of NodeID by MP in RESV RRO, not
>     by PLR.
>
>     Per RFC 4090, backup LSP cannot traverse protected node and/or
>     link. In many cases link between protected node and MP will also
>     be protected link (as part of protected node). Unless MP's phop
>     link is LAN, and backup LSP's upstream hop is on the same LAN and
>     different from protected node, backup LSP will be broken in case
>     of node failure.
>
>     */[Chandra] How about changing the paragraph to the following?/*
>
>     *//*
>
>         -  While selecting the destination address of the bypass LSP, the
>
>          PLR SHOULD select the router ID of the NNhop or Nhop node set
>
>           in the NodeID sub-object included in RRO of RESV. If the MP has
>
>           not included NodeID sub-object in RESV RRO and if the PLR and
>
>           the MP are in same area, then the PLR may utilize the TED to
>
>           determine the router ID from the interface address in RRO.
>     If the
>
>           NP-MP in a different area has not included NodeID in RRO,
>     then the
>
>           PLR SHOULD NOT execute the procedures specified in this
>     document
>
>           because the PLR cannot reliably determine an MP address that
>     does
>
>           not share fate of the protected LSP.
>
>     */The above text in effect recommends a router always include its
>     NodeID sub-object in the RRO object carried in PATH as well as
>     RESV message – as one of additional recommendations over RFC 4090
>     to support FRR with RI-RSVP. Please see next response./*
>
> I am OK with this change.
>
>
>         Section 4.1.3:
>
>         "In addition to the above procedures, the node SHOULD check
>         the presence of remote signaling adjacency with PLR. If a
>         matching Bypass Summary FRR Extended Association object is
>         found in the PATH and if the RSVP-TE signaling adjacency is
>         also present, then the node concludes that the PLR will
>         undertake refresh-interval independent FRR procedures
>         specified in this document."
>
>         What if PLR implements Summary FRR, but doesn't support
>         RI-RSVP and has established signaling adjacency for purpose
>         other than RI-RSVP? Should not MP analyze I-bit in
>         NodeID-based Hello message from PLR, like PLR does for NodeID
>         Hello messages received from MP?
>
>
>
>         */[Chandra] I will modify the first sentence as the one below:/*
>
>              In addition to the above procedures, the node SHOULD check the
>
>             presence of remote signaling adjacency with RI-RSVP
>         capable [TE-SCALE-REC] PLR.
>
>
>
>         "If the PLR has included NodeID sub-object in PATH RRO, then
>         that NodeID is the remote neighbor address. Otherwise, the
>         PLR's interface address in PATH RRO will be the remote
>         neighbor address."
>
>         Maybe it should be said: "Otherwise, the address from
>         Bypass_Source_IPv4_Address field of Bypass Summary FRR
>         Extended Association object will be the remote neighbor
>         address"? If not then in this case PLR will use another
>         address (different from its one in RRO) as source for its
>         bypass tunnel such that MP will not be able to match two
>         interface addresses (one for remote neighbor address from RRO
>         and another for bypass source address) of PLR in order to
>         perform matching of Bypass Summary FRR Extended Association to
>         NodeID hello adjacency. Also, if MP will use PLR's interface
>         address from RRO, NodeID session probably will be broken in
>         case of Nhop link/node failure on PLR.
>
>         */[Chandra] It should be noted that if the PLR and the MP are
>         in the same IGP area, the Bypass_source_IPv4_address field
>         B-SFRR extended association object may also be an interface
>         address (Of course, the interface address that PLR uses as the
>         source address of the bypass tunnel will be different from the
>         protected interface address – otherwise basic FRR will itself
>         break). In such a case, the MP may utilize the TED to
>         determine whether the Bypass_source_IPv4_address corresponds
>         to the same node as the content of the node-id sub-object
>         included by the PLR. I will add the following text to this
>         paragraph to clarify this./*
>
>             In addition to the above procedures, the node SHOULD check the
>
>             presence of remote signaling adjacency with PLR. If a matching
>
>             Bypass Summary FRR Extended Association object is found in
>         the PATH
>
>             and if the RSVP-TE signaling adjacency is also present,
>         then the
>
>             node concludes that the PLR will undertake refresh-interval
>
>             independent FRR procedures specified in this document. If
>         the PLR
>
>             has included NodeID sub-object in PATH RRO, then that
>         NodeID is the
>
>             remote neighbor address. Otherwise, the PLR's interface
>         address in
>
>             PATH RRO will be the remote neighbor address. *_In order
>         to enable_*
>
>         *_    the MP to match the bypass source address in B-SFRR
>         Extended _*
>
>         *_    Association object with the RSVP-TE signaling adjacency
>         with the_*
>
>         *_    PLR, the bypass source address in B-SFRR Extended
>         Association object_*
>
>         *_    should either be (a) the same as the PLR’s address used
>         for Hello_*
>
>         *_    messages of RSVP-TE signaling adjacency or, (b) attached
>         on the same_*
>
>         *_    node on TED as the PLR’s address used for Hello messages
>         of RSVP-TE_*
>
>         *_    signaling adjacency._*
>
>     What about follow sentence? "Otherwise, the PLR's interface
>     address in PATH RRO will be the remote neighbor address."
>
>     If the PLR has been established adjacency from its IP address that
>     is present in PATH RRO (i.e. IP address of protected link), then
>     after failure the adjacency will be broken. As a result, MP will
>     remove normal and remote path state.
>
>     My point here is that PLR must not establish NodeID hello session
>     using IP address of protected link.
>
>     */[Chandra] Yes, I will remove that sentence. How about the
>     following as the opening paragraphs under Section 4.1.3?/*
>
>     *//*
>
>         With regard to the MP procedures that are specified in
>
>     RFC 4090
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_rfc4090&d=DwMDaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=T65i8EMHLU8ObCceVRWi_OwEWo5Wid3fKN72TAGgxB4&s=rdQWQ8nNflyxhpgEyo1EKwsXzg_ReOXi4f95x5FmkWs&e=>,
>     this document specifies the following additional
>
>         procedures.
>
>         Each router supporting this document SHOULD also include its
>
>         router ID in a NodeID sub-object in RRO object carried in the
>
>         RESV message unless configured explicitly not to include NodeID.
>
>         If the router does not include NodeID in RESV RRO and if the
>
>         PLR is in a different IGP area, then the router SHOULD NOT
>
>         execute the MP procedures specified in this document.
>
>     */The above text is the counterpart for the proposed text for PLR
>     procedures (in addition to RFC 4090 procedures) in the previous
>     response above./*
>
> */OK./*
>
>         Section 4.4.2:
>
>         "When a router that has already made NP available detects a
>         change in the RRO carried in RESV message, and if the RRO
>         change indicates that the router's former NP-MP is no longer
>         present in the LSP path, then the router SHOULD send "Remote"
>         PathTear directly to its former NP-MP."
>
>         What if MP doesn't signal its NodeID in Resv RRO, and PLR and
>         MP are in different areas? In this case it could be that "old"
>         and "new" NNhops in fact are the same node.
>
>         */[Chandra] This has already been discussed at length in
>         Section 4.1.1 itself (on how to select the destination address
>         for bypass LSP) and will only be a repetition in Section 4.4.2./*
>
>     I feel that I need to provide example here. R1 and R3 are in
>     different areas, R2 and R4 are ABRs. R3 doesn't insert its NodeID
>     in RESV RRO.
>
>     R1-----R2-----R3
>
>      |      |     |
>
>      +-----R4-----+
>
>     Before failure R1 receives RESV RRO that contains R3's R3->R2
>     address. Then link R2-R3 had been broken, and R2 has activated FRR
>     and signaled backup LSP R2-R4-R3. As a result R1 now receives RESV
>     RRO with R3's R3->R4 address. As soon as R3's R3->R2 address is
>     not present in RESV RRO, R1 concludes that R3 is not present on
>     LSP path anymore. Hence it sends remote PathTear to R3.
>
>     */[Chandra] The backup LSP PATH is from a different Sender and is
>     a logically separate state (though tied to the primary PATH).
>     Hence R2 should not send remote PathTear to R3. You have made a
>     good point because that is somewhat unclear in the draft. Would
>     the following text in Section 4.4.2 clarify this?/*
>
> */I was talking about sending remote PathTear by R1, not by R2. Before 
> failure R1 is receiving Resv RRO as R3'-R2. After failure and 
> signaling backup LSP by R2 it is receiving Resv RRO R3''-R4-R2. Here 
> R3' is IP address of R3 on interface R3->R2 and R3'' is IP address of 
> R3 on interface R3-R4. If R3 is not inserting NodeID in Resv RRO, R1 
> can't understand that R3' and R3'' are both the same node (R3).
>
> /*
>
> */[Chandra] Actually it is a typo – I wanted to mention “R1 should not 
> send Remote PathTear to R3.” The text proposed below will make it 
> explicit because backup LSP signaling during local repair in a way 
> involves some change to Resv RRO. Please see my next response./*
>
/*I'm not sure that have understood you. What do you mean by saying that 
RRO of backup LSP must be handled as per RFC 4090. In RFC 4090 I can 
only see section 6.5 which describes handling of RRO by PLR. Several 
implementations of PLR update RRO being sent to upstream router by 
replacing RRO part of protected LSP from PLR to Tail-end by RRO from 
backup LSP.

In the example above R1 is PLR regarding NP-MP R3. Once R2 has signaled 
backup LSP (after R2-R3 link failure) to R3, R2 is sending updated RRO 
in Resv of protected LSP. Per section 4.4.2 of the draft, R1, as a PLR 
for NP-MP, is detecting absence of NP-MP in RRO and thus is sending 
remote PathTear to R3. R1 has not signaled backup LSP and has deal only 
with Resv RRO of protected LSP. I don't understand how RFC 4090 will 
help here.
*/
>
> *//*
>
>     *//*
>
>         When a router that has already made NP available detects a
>     change in
>
>         the RRO carried in RESV message, and if the RRO change indicates
>
>         that the router's former NP-MP is no longer present in the LSP
>     path,
>
>         then the router SHOULD send "Remote" PathTear directly to its
>     former
>
>         NP-MP. *_However, the change in RRO carried in backup LSP RESV
>     message_*
>
>     *_    that a router detects during local repair actions must be
>     handled as_*
>
>     *_    per RFC 4090._*
>
>     *//*
>
>     My point here is that PLR can use this procedure, unless NP-MP is
>     in different area and doesn't insert its NodeID in RESV RRO. I.e.
>     in this case PLR is not able to identify whether new and old
>     NNhops are the same node or two different ones.
>
>     *//*
>
>     */[Chandra] The clarifying text above should address the confusion? /*
>
>
> */Not specific to this section, but to the whole draft itself. May be 
> it would be better near beginning of the draft to state as a 
> prerequisite that all LSRs must include their NodeID into Path and 
> Resv RROs, unless they could determine NodeID of each other by some 
> other means. Otherwise the solution must not be utilized. Then in the 
> body of the draft to omit cases when PLR and/or MP are not including 
> their NodeID. Also, removing cases when remote adjacency is being 
> established on non-NodeID addresses will avoid establishing of 
> multiple remote adjacencies between a pair of LSRs./*
>
> */[Chandra] I’m okay with adding such text in Section 4.1.2 Remote 
> Signaling Adjacency. I guess that should be fine with you too?/*
>
> */BTW, after the two proposed changes above, there will not be any 
> text in the draft that mentions anything about “interface address” 
> instead of node-id./*
>
>
>         Section 4.5.2.1:
>
>         It is clear that if neighbor doesn't signal I-bit then it
>         doesn't support RI-RSVP-FRR. But what if it signals I-bit? It
>         could mean that it supports RI-RSVP, but not RI-RSVP-FRR.
>         Particularly, it could be that downstream neighbor doesn't
>         support Conditional PathTear, and thus will treat Conditional
>         PathTear as normal one.
>
>         */[Chandra] As explained in Section 3, there are gaps in
>         introducing refresh-interval independence to RFC 4090 facility
>         FRR. Hence, if an implementation has to support both RFC 4090
>         facility FRR and RI-RSVP, then this draft should also be
>         supported. In other words, the RI-RSVP flag means both draft
>         in the context RFC 4090 facility FRR./*
>
>         */Previously, draft-ietf-teas-rsvp-te-scaling-rec (RI-RSVP)
>         used to have text in Section 3 that mandated the support of
>         draft-ietf-mpls-ri-rsvp-frr
>         (see/**/https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02/*
>         <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec-2D02&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=wfWRjYko2S0Ze3RznOMyQDWN2koviAgzgwPJxbJ-Dp8&s=kDHxZ7eLH490Pyb0NhegZ97C6I3bL5hz2gAZIrqt3nU&e=>*/)
>         in the context of RFC 4090 facility FRR. The authors have
>         subsequently removed the line based on a comment that the TEAS
>         draft should be technology independent./*
>
>         */You point is valid and we will address this by making
>         draft-ietf-mpls-ri-rsvp-frr semantically update the RI-RSVP
>         flag in the context of RFC 4090 facility FRR. IOW
>         draft-ietf-mpls-ri-rsvp-frr updates
>         draft-ietf-teas-rsvp-te-scaling-rec./*
>
>
>         Section 4.5.2.2:
>
>         "- If node protection is requested and the Phop node does not
>         support the RI-RSVP-FRR extensions, then the node SHOULD
>         reduce the "refresh period" in TIME_VALUES object carried in
>         PATH to default value."
>
>         Was it meant RESV in place of PATH?
>
>         */[Chandra] TIME_VALUES object in both PATH and RESV should be
>         modified to carry short refresh interval. This is illustrated
>         in the following portion of an LSP./*
>
>         *//*
>
>         */… R11 ---- R12 --- R13 ---/*
>
>         *//*
>
>         */R11 does not support RI-RSVP whereas R12 and R13 do. If R12
>         did not use short refresh interval for signaling PATH messages
>         to R13, then on R13 there will be disparity between the
>         refresh periods of primary PATH arriving from R12 and the
>         backup LSP PATH arriving from R11 after any failure. The
>         benefits of long refresh would anyway be lost once R11 signals
>         backup PATH to R13. Hence, instead of requiring R13 to handle
>         the switch from long to short refresh after a failure in the
>         network, it is recommended to have the refresh periods
>         consistent across failures./*
>
>         *//*
>
>         */In summary, if there is a router not supporting RI-RSVP in
>         the network, then the “impact” radius will be (a) one in both
>         upstream & downstream directions along with LSP path for LSPs
>         requesting link protection, and (b) two in both upstream &
>         downstream directions along with LSP path for LSPs requesting
>         node protection./*
>
>         *//*
>
>         */Thanks,/*
>
>         */Chandra./*
>
>
>         Thank you.
>
>         29.01.2018 16:40, Chandrasekar Ramachandran пишет:
>
>             Hi Alexander,
>
>             RI-RSVP-FRR specification does not remove the backup LSP
>             signaling but only uses B-SFRR association to enable the
>             PLR to signal availability of local protection to the
>             corresponding Merge Point (MP). The MP does not carry
>             B-SFRR association back to the PLR for the actual FRR
>             summarization. RI-RSVP-FRR aims to remove the dependencies
>             that facility FRR has on a short refresh interval. So,
>             with these extensions the LSP states on the Merge Point
>             can remain long enough to ensure that PLR is not time
>             constrained to schedule backup LSP signaling immediately.
>
>             Your comment/question though is relevant to the actual FRR
>             summarization (i.e. summary-frr draft) where the PLR does
>             not have to send the entire backup LSP Path message to the
>             MP after the failure.
>
>             Thanks,
>
>             Chandra.
>
>             *From:*mpls [mailto:mpls-bounces@ietf.org]*On Behalf
>             Of*Alexander Okonnikov
>             *Sent:*Saturday, January 27, 2018 3:25 AM
>             *To:*Mike Taillon (mtaillon)<mtaillon@cisco.com>
>             <mailto:mtaillon@cisco.com>
>             *Cc:*mpls@ietf.org
>             <mailto:mpls@ietf.org>;mpls-chairs@ietf.org
>             <mailto:mpls-chairs@ietf.org>
>             *Subject:*Re: [mpls] WGLC for draft-ietf-mpls-ri-rsvp-frr-02
>
>             Hi,
>
>             What about signaling of MTU, which in regular facility FRR
>             is conveyed in ADSPEC within Path of backup LSP. Per my
>             understanding with proposed solution this information is
>             being lost. Maybe it could be done by signaling MTU in
>             SUMMARY_FRR_BYPASS object and specifying procedure for MP
>             regarding modifying ADSPEC objects of the protected LSPs.
>
>             Thank you.
>
>
>
>
>
>
>                 26 янв. 2018 г., в 20:04, Mike Taillon (mtaillon)
>                 <mtaillon@cisco.com <mailto:mtaillon@cisco.com>>
>                 написал(а):
>
>                 I have reviewed the latest version of this document
>                 and believe this is ready to progress to the next stage.
>
>                 Regards,
>
>                 -Mike (as a contributor)
>
>                     On Jan 10, 2018, at 9:56 AM,N.Leymann@telekom.de
>                     <mailto:N.Leymann@telekom.de>wrote:
>
>                     Working Group,
>
>                     This is to initiate a two week MPLS working group
>                     last call in on
>
>                     draft-ietf-mpls-ri-rsvp-frr-02.
>
>                     Please send your comments to the mpls wg mailing
>                     list (mpls@ietf.org <mailto:mpls@ietf.org>).
>
>                     Please note that there is already one IPR
>                     disclosed for the individual
>
>                     document:
>
>                     https://datatracker.ietf.org/ipr/2580/
>                     <https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_ipr_2580_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=eW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&s=7c5J69aODGQPWNcc2zevUqG2W0dlgUrPv5fFe-BbGl4&e=>
>
>                     All the authors and contributors have stated on
>                     the working group
>
>                     mailing list that they are not aware of any other
>                     IPRs that relates to
>
>                     this document.
>
>                     As with any WGLC, working group participants are
>                     requested to read
>
>                     the document and comment. If you feel that the
>                     document is ready
>
>                     for publication, it is appropriate to respond to
>                     the WGLC with a short
>
>                     and simple email indicating support.
>
>                     This working group last call ends January 24th, 2018.
>
>                     Regards
>
>                     Nic
>
>                     _______________________________________________
>                     mpls mailing list
>                     mpls@ietf.org <mailto:mpls@ietf.org>
>                     https://www.ietf.org/mailman/listinfo/mpls
>                     <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_mpls&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=eW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&s=laVW7-nrUNOG8Uqb8hb1Rxi5cHgbR1OgHAf-ikU5DsU&e=>
>
>                 _______________________________________________
>                 mpls mailing list
>                 mpls@ietf.org <mailto:mpls@ietf.org>
>                 https://www.ietf.org/mailman/listinfo/mpls
>                 <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_mpls&d=DwMDaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&m=qOtXhu4o1urgFIp2tneOy0W2FUPVH1vUrMqjwASJuIU&s=QGooQgdSL_viQdGJavb9u63_lo5hVN_PuDNN40mRCsw&e=>
>


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    <p>Hi Chandra,</p>
    <p><br>
    </p>
    <p>Inline.<br>
    </p>
    <br>
    <div class="moz-cite-prefix">28.02.2018 18:58, Chandrasekar
      Ramachandran пишет:<br>
    </div>
    <blockquote type="cite"
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      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
            Alexander,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Please
            see inline.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Chandra.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                  Alexander Okonnikov
                  [<a class="moz-txt-link-freetext" href="mailto:alexander.okonnikov@gmail.com">mailto:alexander.okonnikov@gmail.com</a>]
                  <br>
                  <b>Sent:</b> Wednesday, February 28, 2018 9:19 PM<br>
                  <b>To:</b> Chandrasekar Ramachandran
                  <a class="moz-txt-link-rfc2396E" href="mailto:csekar@juniper.net">&lt;csekar@juniper.net&gt;</a><br>
                  <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:mpls-chairs@ietf.org">mpls-chairs@ietf.org</a>; Vishnu
                  Pavan Beeram <a class="moz-txt-link-rfc2396E" href="mailto:vbeeram@juniper.net">&lt;vbeeram@juniper.net&gt;</a><br>
                  <b>Subject:</b> Re: [mpls] WGLC for
                  draft-ietf-mpls-ri-rsvp-frr-02<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p>Hi Chandra,<o:p></o:p></p>
          <p>Please, see inline.<o:p></o:p></p>
          <p>Thank you.<o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <p class="MsoNormal">26.02.2018 17:51, Chandrasekar
              Ramachandran пишет:<o:p></o:p></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
                Alexander,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Sorry
                about the delay in responding. Please see inline. If the
                proposed modifications are acceptable, then I will make
                the update in the next version soon.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Thanks,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Chandra.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span
                        style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                      Alexander Okonnikov [<a
                        href="mailto:alexander.okonnikov@gmail.com"
                        moz-do-not-send="true">mailto:alexander.okonnikov@gmail.com</a>]
                      <br>
                      <b>Sent:</b> Sunday, February 11, 2018 12:03 AM<br>
                      <b>To:</b> Chandrasekar Ramachandran <a
                        href="mailto:csekar@juniper.net"
                        moz-do-not-send="true">&lt;csekar@juniper.net&gt;</a><br>
                      <b>Cc:</b> <a href="mailto:mpls@ietf.org"
                        moz-do-not-send="true">mpls@ietf.org</a>; <a
                        href="mailto:mpls-chairs@ietf.org"
                        moz-do-not-send="true">
                        mpls-chairs@ietf.org</a>; Vishnu Pavan Beeram <a
                        href="mailto:vbeeram@juniper.net"
                        moz-do-not-send="true">
                        &lt;vbeeram@juniper.net&gt;</a><br>
                      <b>Subject:</b> Re: [mpls] WGLC for
                      draft-ietf-mpls-ri-rsvp-frr-02</span><o:p></o:p></p>
                </div>
              </div>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p class="MsoNormal">Hi Chandra,<o:p></o:p></p>
              <div>
                <p class="MsoNormal"> <o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal">My comments inline.<o:p></o:p></p>
                <div>
                  <p class="MsoNormal"><br>
                    <br>
                    <br>
                    <o:p></o:p></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <p class="MsoNormal">8 февр. 2018 г., в 21:49,
                        Chandrasekar Ramachandran &lt;<a
                          href="mailto:csekar@juniper.net"
                          moz-do-not-send="true">csekar@juniper.net</a>&gt;
                        написал(а):<o:p></o:p></p>
                    </div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                    <div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
                            Alexander,</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Please
                            refer to my responses inline.</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                      </div>
                      <div style="border:none;border-left:solid blue
                        1.5pt;padding:0in 0in 0in 4.0pt">
                        <div>
                          <div style="border:none;border-top:solid
                            #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
                            <div>
                              <p class="MsoNormal"
                                style="background:white"><b><span
                                    style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
                                  class="apple-converted-space"><span
                                    style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span></span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Alexander
                                  Okonnikov [</span><a
                                  href="mailto:alexander.okonnikov@gmail.com"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mailto:alexander.okonnikov@gmail.com</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">]<span
                                    class="apple-converted-space"> </span><br>
                                  <b>Sent:</b><span
                                    class="apple-converted-space"> </span>Monday,
                                  January 29, 2018 7:31 PM<br>
                                  <b>To:</b><span
                                    class="apple-converted-space"> </span>Chandrasekar
                                  Ramachandran &lt;</span><a
                                  href="mailto:csekar@juniper.net"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">csekar@juniper.net</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;;
                                  Mike Taillon (mtaillon) &lt;</span><a
                                  href="mailto:mtaillon@cisco.com"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mtaillon@cisco.com</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;<br>
                                  <b>Cc:</b><span
                                    class="apple-converted-space"> </span></span><a
                                  href="mailto:mpls@ietf.org"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;<span
                                    class="apple-converted-space"> </span></span><a
                                  href="mailto:mpls-chairs@ietf.org"
                                  moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls-chairs@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
                                  <b>Subject:</b><span
                                    class="apple-converted-space"> </span>Re:
                                  [mpls] WGLC for
                                  draft-ietf-mpls-ri-rsvp-frr-02</span><o:p></o:p></p>
                            </div>
                          </div>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"> <o:p></o:p></p>
                        </div>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">Hi
                          Chandra,<o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">I'm
                          sorry. Yes, I mixed these two drafts. Follow
                          is my comments for
                          draft-ietf-mpls-ri-rsvp-frr-02:<o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">Section
                          2:<br>
                          <br>
                          "NP-MP node: Merger Point router at the tail
                          of Node-protecting bypass tunnel."<br>
                          <br>
                          Merger -&gt; Merge<br>
                          <br>
                          <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                I will fix this in the next version of
                                the draft.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                          Section 4.1.1:<br>
                          <br>
                          "If the NP-MP in a different area has not
                          included NodeID in RRO, then the PLR SHOULD
                          use NP-MP's interface address present in the
                          RRO."<br>
                          <br>
                          It would cause for NodeID-based adjacency and
                          bypass tunnel to be broken in case of Nhop
                          node failure.<o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                Inclusion of NodeID in RRO is a SHOULD
                                clause in the draft.</span></i></b><o:p></o:p></p>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New&quot;,serif">   
                              - <span class="apple-converted-space"> </span></span><span
style="font-size:10.0pt;font-family:&quot;Courier
                              New&quot;,serif;color:#0070C0">The PLR
                              SHOULD also include its router ID in a
                              NodeID sub-object</span><o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New
                              ;color:#0070C0&quot;,serif">      in PATH
                              RRO unless configured explicitly not to
                              include NodeID.</span><o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New
                              ;color:#0070C0&quot;,serif">      While
                              including its router ID in the NodeID
                              sub-object carried in</span><o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New
                              ;color:#0070C0&quot;,serif">      the
                              outgoing Path message, the PLR MUST
                              include the NodeID sub-</span><o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New
                              ;color:#0070C0&quot;,serif">      object
                              after including its IPv4/IPv6 address or
                              unnumbered</span><o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New
                              ;color:#0070C0&quot;,serif">     
                              interface ID sub-object.</span><o:p></o:p></p>
                        </div>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">So
                                the condition you have pointed out is
                                the case that may occur if the PLR is
                                explicitly configured by policy not to
                                include NodeID in the RRO. It should
                                also be noted that even if PLR is
                                configured not to include NodeID in RRO,
                                the PLR can offer protection for the
                                following failures.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-indent:-.25in;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">1.</span></i></b><span
                            style="font-size:7.0pt;color:#0070C0">      <span
                              class="apple-converted-space"> </span></span><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">PLR
                                nhop link failure</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-indent:-.25in;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">2.</span></i></b><span
                            style="font-size:7.0pt;color:#0070C0">      <span
                              class="apple-converted-space"> </span></span><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Nhop
                                node control plane failures that do not
                                automatically result in LoS at the NP-MP</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Hence,
                                the draft does not specify inclusion of
                                NodeID as a MUST condition.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"> <o:p></o:p></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class="MsoNormal">Here I said about not inclusion
                      of NodeID by MP in RESV RRO, not by PLR.<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal">Per RFC 4090, backup LSP cannot
                      traverse protected node and/or link. In many cases
                      link between protected node and MP will also be
                      protected link (as part of protected node). Unless
                      MP's phop link is LAN, and backup LSP's upstream
                      hop is on the same LAN and different from
                      protected node, backup LSP will be broken in case
                      of node failure.<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
                    <pre><b><i><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra] How about changing the paragraph to the following?</span></i></b><o:p></o:p></pre>
                    <pre><b><i><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span></i></b><o:p></o:p></pre>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    -  While selecting the
                        destination address of the bypass LSP, the</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">     PLR SHOULD select the
                        router ID of the NNhop or Nhop node set</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      in the NodeID sub-object
                        included in RRO of RESV. If the MP has</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      not included NodeID
                        sub-object in RESV RRO and if the PLR and
                      </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      the MP are in same area,
                        then the PLR may utilize the TED to
                      </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      determine the router ID
                        from the interface address in RRO. If the</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      NP-MP in a different area
                        has not included NodeID in RRO, then the</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      PLR SHOULD NOT execute
                        the procedures specified in this document
                      </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      because the PLR cannot
                        reliably determine an MP address that does</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">      not share fate of the
                        protected LSP.</span><o:p></o:p></p>
                    <pre><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></pre>
                    <pre><b><i><span style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The above text in effect recommends a router always include its NodeID sub-object in the RRO object carried in PATH as well as RESV message – as one of additional recommendations over RFC 4090 to support FRR with RI-RSVP. Please see next response.</span></i></b><o:p></o:p></pre>
                  </div>
                </div>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal">I am OK with this change.<br>
            <br>
            <o:p></o:p></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div style="border:none;border-left:solid blue
                        1.5pt;padding:0in 0in 0in 4.0pt">
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                          Section 4.1.3:<br>
                          <br>
                          "In addition to the above procedures, the node
                          SHOULD check the presence of remote signaling
                          adjacency with PLR. If a matching Bypass
                          Summary FRR Extended Association object is
                          found in the PATH and if the RSVP-TE signaling
                          adjacency is also present, then the node
                          concludes that the PLR will undertake
                          refresh-interval independent FRR procedures
                          specified in this document."<br>
                          <br>
                          What if PLR implements Summary FRR, but
                          doesn't support RI-RSVP and has established
                          signaling adjacency for purpose other than
                          RI-RSVP? Should not MP analyze I-bit in
                          NodeID-based Hello message from PLR, like PLR
                          does for NodeID Hello messages received from
                          MP?<br>
                          <br>
                          <br>
                          <br>
                          <o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                I will modify the first sentence as the
                                one below:</span></i></b><o:p></o:p></p>
                        <pre style="background:white">    <span style="color:#0070C0">In addition to the above procedures, the node SHOULD check the</span><o:p></o:p></pre>
                        <pre style="background:white"><span style="color:#0070C0">    presence of remote signaling adjacency with RI-RSVP capable [TE-SCALE-REC] PLR.</span><o:p></o:p></pre>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                          <br>
                          "If the PLR has included NodeID sub-object in
                          PATH RRO, then that NodeID is the remote
                          neighbor address. Otherwise, the PLR's
                          interface address in PATH RRO will be the
                          remote neighbor address."<br>
                          <br>
                          Maybe it should be said: "Otherwise, the
                          address from Bypass_Source_IPv4_Address field
                          of Bypass Summary FRR Extended Association
                          object will be the remote neighbor address"?
                          If not then in this case PLR will use another
                          address (different from its one in RRO) as
                          source for its bypass tunnel such that MP will
                          not be able to match two interface addresses
                          (one for remote neighbor address from RRO and
                          another for bypass source address) of PLR in
                          order to perform matching of Bypass Summary
                          FRR Extended Association to NodeID hello
                          adjacency. Also, if MP will use PLR's
                          interface address from RRO, NodeID session
                          probably will be broken in case of Nhop
                          link/node failure on PLR.<br>
                          <br>
                          <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                It should be noted that if the PLR and
                                the MP are in the same IGP area, the
                                Bypass_source_IPv4_address field B-SFRR
                                extended association object may also be
                                an interface address (Of course, the
                                interface address that PLR uses as the
                                source address of the bypass tunnel will
                                be different from the protected
                                interface address – otherwise basic FRR
                                will itself break). In such a case, the
                                MP may utilize the TED to determine
                                whether the Bypass_source_IPv4_address
                                corresponds to the same node as the
                                content of the node-id sub-object
                                included by the PLR. I will add the
                                following text to this paragraph to
                                clarify this.</span></i></b><o:p></o:p></p>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    In addition to the above procedures, the node SHOULD check the</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    presence of remote signaling adjacency with PLR. If a matching</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    Bypass Summary FRR Extended Association object is found in the PATH</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    and if the RSVP-TE signaling adjacency is also present, then the</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    node concludes that the PLR will undertake refresh-interval</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    independent FRR procedures specified in this document. If the PLR</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    has included NodeID sub-object in PATH RRO, then that NodeID is the</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    remote neighbor address. Otherwise, the PLR's interface address in</span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><span style="color:#0070C0">    PATH RRO will be the remote neighbor address. <b><u>In order to enable</u></b></span><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    the MP to match the bypass source address in B-SFRR Extended </span></u></b><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    Association object with the RSVP-TE signaling adjacency with the</span></u></b><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    PLR, the bypass source address in B-SFRR Extended Association object</span></u></b><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    should either be (a) the same as the PLR’s address used for Hello</span></u></b><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    messages of RSVP-TE signaling adjacency or, (b) attached on the same</span></u></b><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    node on TED as the PLR’s address used for Hello messages of RSVP-TE</span></u></b><o:p></o:p></pre>
                        <pre style="margin-left:5.5pt;background:white"><b><u><span style="color:#0070C0">    signaling adjacency.</span></u></b><o:p></o:p></pre>
                        <div>
                          <p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:&quot;Courier New&quot;,serif">   </span><o:p></o:p></p>
                        </div>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"> <o:p></o:p></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class="MsoNormal">What about follow sentence?
                      "Otherwise, the PLR's interface address in PATH
                      RRO will be the remote neighbor address."<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal">If the PLR has been established
                      adjacency from its IP address that is present in
                      PATH RRO (i.e. IP address of protected link), then
                      after failure the adjacency will be broken. As a
                      result, MP will remove normal and remote path
                      state.<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal">My point here is that PLR must
                      not establish NodeID hello session using IP
                      address of protected link.<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra]
                            Yes, I will remove that sentence. How about
                            the following as the opening paragraphs
                            under Section 4.1.3?</span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    With regard to the MP
                        procedures that are specified in</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">   
                        <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_rfc4090&amp;d=DwMDaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=T65i8EMHLU8ObCceVRWi_OwEWo5Wid3fKN72TAGgxB4&amp;s=rdQWQ8nNflyxhpgEyo1EKwsXzg_ReOXi4f95x5FmkWs&amp;e="
                          moz-do-not-send="true">
                          RFC 4090</a>, this document specifies the
                        following additional </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    procedures.</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif"> </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    Each router supporting this
                        document SHOULD also include its
                      </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    router ID in a NodeID
                        sub-object in RRO object carried in the</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    RESV message unless
                        configured explicitly not to include NodeID.</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    If the router does not
                        include NodeID in RESV RRO and if the</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    PLR is in a different IGP
                        area, then the router SHOULD NOT
                      </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    execute the MP procedures
                        specified in this document.</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif"> </span><o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The
                            above text is the counterpart for the
                            proposed text for PLR procedures (in
                            addition to RFC 4090 procedures) in the
                            previous response above.</span></i></b><o:p></o:p></p>
                  </div>
                </div>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><b><i>OK.</i></b><br>
            <br>
            <o:p></o:p></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div style="border:none;border-left:solid blue
                        1.5pt;padding:0in 0in 0in 4.0pt">
                        <p class="MsoNormal"
                          style="mso-margin-top-alt:auto;margin-bottom:12.0pt;background:white">
                          Section 4.4.2:<br>
                          <br>
                          "When a router that has already made NP
                          available detects a change in the RRO carried
                          in RESV message, and if the RRO change
                          indicates that the router's former NP-MP is no
                          longer present in the LSP path, then the
                          router SHOULD send "Remote" PathTear directly
                          to its former NP-MP."<br>
                          <br>
                          What if MP doesn't signal its NodeID in Resv
                          RRO, and PLR and MP are in different areas? In
                          this case it could be that "old" and "new"
                          NNhops in fact are the same node.<br>
                          <br>
                          <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                This has already been discussed at
                                length in Section 4.1.1 itself (on how
                                to select the destination address for
                                bypass LSP) and will only be a
                                repetition in Section 4.4.2.<span
                                  class="apple-converted-space"> </span></span></i></b><o:p></o:p></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class="MsoNormal">I feel that I need to provide
                      example here. R1 and R3 are in different areas, R2
                      and R4 are ABRs. R3 doesn't insert its NodeID in
                      RESV RRO.<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
                        style="font-family:&quot;Courier
                        New&quot;,serif">R1-----R2-----R3</span><o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
                        style="font-family:&quot;Courier
                        New&quot;,serif"> |      |     |</span><o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
                        style="font-family:&quot;Courier
                        New&quot;,serif"> +-----R4-----+</span><o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"> <o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal">Before failure R1 receives RESV
                      RRO that contains R3's R3-&gt;R2 address. Then
                      link R2-R3 had been broken, and R2 has activated
                      FRR and signaled backup LSP R2-R4-R3. As a result
                      R1 now receives RESV RRO with R3's R3-&gt;R4
                      address. As soon as R3's R3-&gt;R2 address is not
                      present in RESV RRO, R1 concludes that R3 is not
                      present on LSP path anymore. Hence it sends remote
                      PathTear to R3.<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra]
                            The backup LSP PATH is from a different
                            Sender and is a logically separate state
                            (though tied to the primary PATH). Hence R2
                            should not send remote PathTear to R3. You
                            have made a good point because that is
                            somewhat unclear in the draft. Would the
                            following text in Section 4.4.2 clarify
                            this?</span></i></b><o:p></o:p></p>
                  </div>
                </div>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><b><i>I was talking about sending remote
                PathTear by R1, not by R2. Before failure R1 is
                receiving Resv RRO as R3'-R2. After failure and
                signaling backup LSP by R2 it is receiving Resv RRO
                R3''-R4-R2. Here R3' is IP address of R3 on interface
                R3-&gt;R2 and R3'' is IP address of R3 on interface
                R3-R4. If R3 is not inserting NodeID in Resv RRO, R1
                can't understand that R3' and R3'' are both the same
                node (R3).<br>
                <br>
              </i></b><o:p></o:p></p>
          <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">[Chandra]
                  Actually it is a typo – I wanted to mention “R1 should
                  not send Remote PathTear to R3.” The text proposed
                  below will make it explicit because backup LSP
                  signaling during local repair in a way involves some
                  change to Resv RRO. Please see my next response.</span></i></b></p>
        </div>
      </div>
    </blockquote>
    <i><b>I'm not sure that have understood you. What do you mean by
        saying that RRO of backup LSP must be handled as per RFC 4090.
        In RFC 4090 I can only see section 6.5 which describes handling
        of RRO by PLR. Several implementations of PLR update RRO being
        sent to upstream router by replacing RRO part of protected LSP
        from PLR to Tail-end by RRO from backup LSP.<br>
        <br>
        In the example above R1 is PLR regarding NP-MP R3. Once R2 has
        signaled backup LSP (after R2-R3 link failure) to R3, R2 is
        sending updated RRO in Resv of protected LSP. Per section 4.4.2
        of the draft, R1, as a PLR for NP-MP, is detecting absence of
        NP-MP in RRO and thus is sending remote PathTear to R3. R1 has
        not signaled backup LSP and has deal only with Resv RRO of
        protected LSP. I don't understand how RFC 4090 will help here.<br>
      </b></i>
    <blockquote type="cite"
cite="mid:BY1PR0501MB138164E83DCC53E4EA523B10D9C70@BY1PR0501MB1381.namprd05.prod.outlook.com">
      <div class="WordSection1">
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p></o:p></span></i></b></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div>
                  <div>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    When a router that has
                        already made NP available detects a change in</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    the RRO carried in RESV
                        message, and if the RRO change indicates</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    that the router's former
                        NP-MP is no longer present in the LSP path,</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    then the router SHOULD send
                        "Remote" PathTear directly to its former</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
                        style="font-size:10.0pt;font-family:&quot;Courier
                        New&quot;,serif">    NP-MP.
                        <b><u>However, the change in RRO carried in
                            backup LSP RESV message</u></b></span><o:p></o:p></p>
                    <p class="MsoNormal"><b><u><span
                            style="font-size:10.0pt;font-family:&quot;Courier
                            New&quot;,serif">    that a router detects
                            during local repair actions must be handled
                            as</span></u></b><o:p></o:p></p>
                    <p class="MsoNormal"><b><u><span
                            style="font-size:10.0pt;font-family:&quot;Courier
                            New&quot;,serif">    per RFC 4090.</span></u></b><o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal">My point here is that PLR can
                      use this procedure, unless NP-MP is in different
                      area and doesn't insert its NodeID in RESV RRO.
                      I.e. in this case PLR is not able to identify
                      whether new and old NNhops are the same node or
                      two different ones.<o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span></i></b><o:p></o:p></p>
                    <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Chandra]
                            The clarifying text above should address the
                            confusion?
                          </span></i></b><o:p></o:p></p>
                  </div>
                </div>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><br>
            <b><i>Not specific to this section, but to the whole draft
                itself. May be it would be better near beginning of the
                draft to state as a prerequisite that all LSRs must
                include their NodeID into Path and Resv RROs, unless
                they could determine NodeID of each other by some other
                means. Otherwise the solution must not be utilized. Then
                in the body of the draft to omit cases when PLR and/or
                MP are not including their NodeID. Also, removing cases
                when remote adjacency is being established on non-NodeID
                addresses will avoid establishing of multiple remote
                adjacencies between a pair of LSRs.</i></b><br>
            <br>
            <o:p></o:p></p>
          <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">[Chandra]
                  I’m okay with adding such text in Section 4.1.2 Remote
                  Signaling Adjacency. I guess that should be fine with
                  you too?<o:p></o:p></span></i></b></p>
          <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">BTW,
                  after the two proposed changes above, there will not
                  be any text in the draft that mentions anything about
                  “interface address” instead of node-id.<o:p></o:p></span></i></b></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div style="border:none;border-left:solid blue
                        1.5pt;padding:0in 0in 0in 4.0pt">
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><br>
                          Section 4.5.2.1:<br>
                          <br>
                          It is clear that if neighbor doesn't signal
                          I-bit then it doesn't support RI-RSVP-FRR. But
                          what if it signals I-bit? It could mean that
                          it supports RI-RSVP, but not RI-RSVP-FRR.
                          Particularly, it could be that downstream
                          neighbor doesn't support Conditional PathTear,
                          and thus will treat Conditional PathTear as
                          normal one.<br>
                          <br>
                          <b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                As explained in Section 3, there are
                                gaps in introducing refresh-interval
                                independence to RFC 4090 facility FRR.
                                Hence, if an implementation has to
                                support both RFC 4090 facility FRR and
                                RI-RSVP, then this draft should also be
                                supported. In other words, the RI-RSVP
                                flag means both draft in the context RFC
                                4090 facility FRR.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Previously,
                                draft-ietf-teas-rsvp-te-scaling-rec
                                (RI-RSVP) used to have text in Section 3
                                that mandated the support of
                                draft-ietf-mpls-ri-rsvp-frr (see</span></i></b><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dteas-2Drsvp-2Dte-2Dscaling-2Drec-2D02&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=wfWRjYko2S0Ze3RznOMyQDWN2koviAgzgwPJxbJ-Dp8&amp;s=kDHxZ7eLH490Pyb0NhegZ97C6I3bL5hz2gAZIrqt3nU&amp;e="
                            moz-do-not-send="true"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">https://tools.ietf.org/html/draft-ietf-teas-rsvp-te-scaling-rec-02</span></i></b></a><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">)
                                in the context of RFC 4090 facility FRR.
                                The authors have subsequently removed
                                the line based on a comment that the
                                TEAS draft should be technology
                                independent.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">You
                                point is valid and we will address this
                                by making draft-ietf-mpls-ri-rsvp-frr
                                semantically update the RI-RSVP flag in
                                the context of RFC 4090 facility FRR.
                                IOW draft-ietf-mpls-ri-rsvp-frr updates
                                draft-ietf-teas-rsvp-te-scaling-rec.</span></i></b><br>
                          <br>
                          <br>
                          Section 4.5.2.2:<br>
                          <br>
                          "- If node protection is requested and the
                          Phop node does not support the RI-RSVP-FRR
                          extensions, then the node SHOULD reduce the
                          "refresh period" in TIME_VALUES object carried
                          in PATH to default value."<br>
                          <br>
                          Was it meant RESV in place of PATH?<o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">[Chandra]
                                TIME_VALUES object in both PATH and RESV
                                should be modified to carry short
                                refresh interval. This is illustrated in
                                the following portion of an LSP.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">…
                                R11 ---- R12 --- R13 ---</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">R11
                                does not support RI-RSVP whereas R12 and
                                R13 do. If R12 did not use short refresh
                                interval for signaling PATH messages to
                                R13, then on R13 there will be disparity
                                between the refresh periods of primary
                                PATH arriving from R12 and the backup
                                LSP PATH arriving from R11 after any
                                failure. The benefits of long refresh
                                would anyway be lost once R11 signals
                                backup PATH to R13. Hence, instead of
                                requiring R13 to handle the switch from
                                long to short refresh after a failure in
                                the network, it is recommended to have
                                the refresh periods consistent across
                                failures.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">In
                                summary, if there is a router not
                                supporting RI-RSVP in the network, then
                                the “impact” radius will be (a) one in
                                both upstream &amp; downstream
                                directions along with LSP path for LSPs
                                requesting link protection, and (b) two
                                in both upstream &amp; downstream
                                directions along with LSP path for LSPs
                                requesting node protection.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0"> </span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Thanks,</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#0070C0">Chandra.</span></i></b><o:p></o:p></p>
                        <p class="MsoNormal"
                          style="margin-bottom:12.0pt;background:white"><br>
                          Thank you.<o:p></o:p></p>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white">29.01.2018 16:40,
                              Chandrasekar Ramachandran пишет:<o:p></o:p></p>
                          </div>
                        </div>
                        <blockquote
                          style="margin-top:5.0pt;margin-bottom:5.0pt">
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Hi
                                Alexander,</span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">RI-RSVP-FRR
                                specification does not remove the backup
                                LSP signaling but only uses B-SFRR
                                association to enable the PLR to signal
                                availability of local protection to the
                                corresponding Merge Point (MP). The MP
                                does not carry B-SFRR association back
                                to the PLR for the actual FRR
                                summarization. RI-RSVP-FRR aims to
                                remove the dependencies that facility
                                FRR has on a short refresh interval. So,
                                with these extensions the LSP states on
                                the Merge Point can remain long enough
                                to ensure that PLR is not time
                                constrained to schedule backup LSP
                                signaling immediately.</span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Your
                                comment/question though is relevant to
                                the actual FRR summarization (i.e.
                                summary-frr draft) where the PLR does
                                not have to send the entire backup LSP
                                Path message to the MP after the
                                failure.</span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Thanks,</span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Chandra.</span><o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                          </div>
                          <div style="border:none;border-left:solid blue
                            1.5pt;padding:0in 0in 0in 4.0pt">
                            <div>
                              <div style="border:none;border-top:solid
                                #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
                                <div>
                                  <p class="MsoNormal"
                                    style="background:white"><b><span
                                        style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
                                      class="apple-converted-space"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span></span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mpls
                                      [</span><a
                                      href="mailto:mpls-bounces@ietf.org"
                                      moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mailto:mpls-bounces@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">]<span
                                        class="apple-converted-space"> </span><b>On
                                        Behalf Of<span
                                          class="apple-converted-space"> </span></b>Alexander
                                      Okonnikov<br>
                                      <b>Sent:</b><span
                                        class="apple-converted-space"> </span>Saturday,
                                      January 27, 2018 3:25 AM<br>
                                      <b>To:</b><span
                                        class="apple-converted-space"> </span>Mike
                                      Taillon (mtaillon)<span
                                        class="apple-converted-space"> </span></span><a
                                      href="mailto:mtaillon@cisco.com"
                                      moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">&lt;mtaillon@cisco.com&gt;</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
                                      <b>Cc:</b><span
                                        class="apple-converted-space"> </span></span><a
                                      href="mailto:mpls@ietf.org"
                                      moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;<span
                                        class="apple-converted-space"> </span></span><a
                                      href="mailto:mpls-chairs@ietf.org"
                                      moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls-chairs@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
                                      <b>Subject:</b><span
                                        class="apple-converted-space"> </span>Re:
                                      [mpls] WGLC for
                                      draft-ietf-mpls-ri-rsvp-frr-02</span><o:p></o:p></p>
                                </div>
                              </div>
                            </div>
                            <div>
                              <p class="MsoNormal"
                                style="background:white"> <o:p></o:p></p>
                            </div>
                            <div>
                              <p class="MsoNormal"
                                style="background:white">Hi,<o:p></o:p></p>
                            </div>
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="background:white"> <o:p></o:p></p>
                              </div>
                            </div>
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="background:white">What about
                                  signaling of MTU, which in regular
                                  facility FRR is conveyed in ADSPEC
                                  within Path of backup LSP. Per my
                                  understanding with proposed solution
                                  this information is being lost. Maybe
                                  it could be done by signaling MTU in
                                  SUMMARY_FRR_BYPASS object and
                                  specifying procedure for MP regarding
                                  modifying ADSPEC objects of the
                                  protected LSPs.<o:p></o:p></p>
                              </div>
                            </div>
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="background:white"> <o:p></o:p></p>
                              </div>
                            </div>
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="background:white">Thank you.<o:p></o:p></p>
                              </div>
                              <div>
                                <div>
                                  <p class="MsoNormal"
                                    style="background:white"><br>
                                    <br>
                                    <br>
                                    <br>
                                    <br>
                                    <o:p></o:p></p>
                                </div>
                                <blockquote
                                  style="margin-top:5.0pt;margin-bottom:5.0pt">
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="background:white">26 янв.
                                        2018 г., в 20:04, Mike Taillon
                                        (mtaillon) &lt;<a
                                          href="mailto:mtaillon@cisco.com"
                                          moz-do-not-send="true"><span
                                            style="color:purple">mtaillon@cisco.com</span></a>&gt;
                                        написал(а):<o:p></o:p></p>
                                    </div>
                                  </div>
                                  <div>
                                    <p class="MsoNormal"
                                      style="background:white"> <o:p></o:p></p>
                                  </div>
                                  <div>
                                    <div>
                                      <div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="margin-bottom:12.0pt;background:white">I
                                            have reviewed the latest
                                            version of this document and
                                            believe this is ready to
                                            progress to the next stage.<o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="background:white">Regards,<o:p></o:p></p>
                                        </div>
                                      </div>
                                      <div>
                                        <p class="MsoNormal"
                                          style="background:white">-Mike
                                          (as a contributor)<span
                                            class="apple-converted-space"> </span><o:p></o:p></p>
                                      </div>
                                      <div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="background:white"> <o:p></o:p></p>
                                        </div>
                                      </div>
                                      <div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="background:white"> <o:p></o:p></p>
                                        </div>
                                        <div>
                                          <blockquote
                                            style="margin-top:5.0pt;margin-bottom:5.0pt">
                                            <div>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="background:white">On
                                                  Jan 10, 2018, at 9:56
                                                  AM,<span
                                                    class="apple-converted-space"> </span><a
href="mailto:N.Leymann@telekom.de" moz-do-not-send="true"><span
                                                      style="color:purple">N.Leymann@telekom.de</span></a><span
class="apple-converted-space"> </span>wrote:<o:p></o:p></p>
                                              </div>
                                            </div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="background:white"> <o:p></o:p></p>
                                            </div>
                                            <div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Working
                                                      Group,</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This
                                                      is to initiate a
                                                      two week MPLS
                                                      working group last
                                                      call in on<span
                                                        class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">draft-ietf-mpls-ri-rsvp-frr-02.</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Please
                                                      send your comments
                                                      to the mpls wg
                                                      mailing list (</span><a
href="mailto:mpls@ietf.org" moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">).</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Please
                                                      note that there is
                                                      already one IPR
                                                      disclosed for the
                                                      individual<span
                                                        class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">document:</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_ipr_2580_&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=eW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&amp;s=7c5J69aODGQPWNcc2zevUqG2W0dlgUrPv5fFe-BbGl4&amp;e="
moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:purple">https://datatracker.ietf.org/ipr/2580/</span></a><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">All
                                                      the authors and
                                                      contributors have
                                                      stated on the
                                                      working group<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mailing
                                                      list that they are
                                                      not aware of any
                                                      other IPRs that
                                                      relates to<span
                                                        class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">this
                                                      document.<span
                                                        class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">As
                                                      with any WGLC,
                                                      working group
                                                      participants are
                                                      requested to read<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">the
                                                      document and
                                                      comment. If you
                                                      feel that the
                                                      document is ready<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">for
                                                      publication, it is
                                                      appropriate to
                                                      respond to the
                                                      WGLC with a short<span
class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">and
                                                      simple email
                                                      indicating
                                                      support.<span
                                                        class="apple-converted-space"> </span></span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This
                                                      working group last
                                                      call ends January
                                                      24th, 2018.</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Regards</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Nic</span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="background:white"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
                                                </div>
                                              </div>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="background:white"><span
style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">_______________________________________________<br>
                                                    mpls mailing list<br>
                                                  </span><a
                                                    href="mailto:mpls@ietf.org"
moz-do-not-send="true"><span
style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif;color:purple">mpls@ietf.org</span></a><span
style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif"><br>
                                                  </span><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_mpls&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=eW0CpjEzVwQYj4blOzVet21naP3yv894yzb0eNsfzVQ&amp;s=laVW7-nrUNOG8Uqb8hb1Rxi5cHgbR1OgHAf-ikU5DsU&amp;e="
moz-do-not-send="true"><span
style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif;color:purple">https://www.ietf.org/mailman/listinfo/mpls</span></a><o:p></o:p></p>
                                              </div>
                                            </div>
                                          </blockquote>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="background:white"> <o:p></o:p></p>
                                        </div>
                                      </div>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="background:white">_______________________________________________<br>
                                        mpls mailing list<br>
                                        <a href="mailto:mpls@ietf.org"
                                          moz-do-not-send="true"><span
                                            style="color:purple">mpls@ietf.org</span></a><br>
                                        <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_mpls&amp;d=DwMDaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=iEQmXlRGWdNbtvVr6ghcatwLYhZUbMF-u63wi_-VTtA&amp;m=qOtXhu4o1urgFIp2tneOy0W2FUPVH1vUrMqjwASJuIU&amp;s=QGooQgdSL_viQdGJavb9u63_lo5hVN_PuDNN40mRCsw&amp;e="
                                          moz-do-not-send="true"><span
                                            style="color:purple">https://www.ietf.org/mailman/listinfo/mpls</span></a><o:p></o:p></p>
                                    </div>
                                  </div>
                                </blockquote>
                              </div>
                              <div>
                                <p class="MsoNormal"
                                  style="background:white"> <o:p></o:p></p>
                              </div>
                            </div>
                          </div>
                        </blockquote>
                        <div>
                          <p class="MsoNormal" style="background:white"> <o:p></o:p></p>
                        </div>
                      </div>
                    </div>
                  </blockquote>
                </div>
                <p class="MsoNormal"> <o:p></o:p></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><o:p> </o:p></p>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

--------------1CCA812E08039F5622CCBD8A--


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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: "ccamp@ietf.org" <ccamp@ietf.org>, "lisp@ietf.org" <lisp@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "pce@ietf.org" <pce@ietf.org>, "teas@ietf.org" <teas@ietf.org>
Thread-Topic: Quiet period for document publication?
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Date: Wed, 28 Feb 2018 23:03:51 +0000
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Subject: [mpls] Quiet period for document publication?
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Hi,

I've had several inquiries on progressing documents, here's an update. As a=
 result of an extremely heavy load for the telechats during these couple of=
 months due to exiting ADs clearing their decks and the resulting overwhelm=
ing load for the directorate reviewers, the remaining ADs have been request=
ed to refrain from any Last Calls. Additionally any non-essential documents=
 have been requested to be postponed to late April telechats.

I already had initiated Last Calls before the freeze for:
draft-ietf-lisp-signal-free-multicast
draft-ietf-teas-rsvp-egress-protection
draft-ietf-teas-rsvp-ingress-protection
I've scheduled these for the 3/8 telechat. Due to the heavy load, these may=
 or may not be reviewed. The authors should ensure to timely answer any com=
ments and upload a clean document if needed for the telechat review by 3/2.=
 If the document has not been updated for dir review comments, I will need =
to move it to a future telechat.

I also have in progress Last Calls for:
draft-ietf-pce-lsp-setup-type
draft-teas-scheduled-resources
Due to the overload, I needed to request extended Last Calls for these with=
 a new date of 3/28, telechat 4/5. Again, the authors should ensure timely =
responses to the reviewers and upload a clean document if needed for the te=
lechat review by 4/1.

The quiet period continues for this next month for requesting Last Calls. A=
fter the IETF meeting, we can start progressing our documents.

Safe travels for IETF101-
Deborah


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<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I&#8217;ve had several inquiries on progressing docu=
ments, here&#8217;s an update. As a result of an extremely heavy load for t=
he telechats during these couple of months due to exiting ADs clearing thei=
r decks and the resulting overwhelming load for
 the directorate reviewers, the remaining ADs have been requested to refrai=
n from any Last Calls. Additionally any non-essential documents have been r=
equested to be postponed to late April telechats.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I already had initiated Last Calls before the freeze=
 for:<o:p></o:p></p>
<p class=3D"MsoNormal">draft-ietf-lisp-signal-free-multicast<o:p></o:p></p>
<p class=3D"MsoNormal">draft-ietf-teas-rsvp-egress-protection<o:p></o:p></p=
>
<p class=3D"MsoNormal">draft-ietf-teas-rsvp-ingress-protection<o:p></o:p></=
p>
<p class=3D"MsoNormal">I&#8217;ve scheduled these for the 3/8 telechat. Due=
 to the heavy load, these may or may not be reviewed. The authors should en=
sure to timely answer any comments and upload a clean document if needed fo=
r the telechat review by 3/2. If the document
 has not been updated for dir review comments, I will need to move it to a =
future telechat.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I also have in progress Last Calls for:<o:p></o:p></=
p>
<p class=3D"MsoNormal">draft-ietf-pce-lsp-setup-type<o:p></o:p></p>
<p class=3D"MsoNormal">draft-teas-scheduled-resources<o:p></o:p></p>
<p class=3D"MsoNormal">Due to the overload, I needed to request extended La=
st Calls for these with a new date of 3/28, telechat 4/5. Again, the author=
s should ensure timely responses to the reviewers and upload a clean docume=
nt if needed for the telechat review
 by 4/1.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The quiet period continues for this next month for r=
equesting Last Calls. After the IETF meeting, we can start progressing our =
documents.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Safe travels for IETF101-<o:p></o:p></p>
<p class=3D"MsoNormal">Deborah<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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From: Dino Farinacci <farinacci@gmail.com>
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To: "BRUNGARD, DEBORAH A" <db3546@att.com>
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Subject: Re: [mpls] [lisp] Quiet period for document publication?
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> I already had initiated Last Calls before the freeze for:
> draft-ietf-lisp-signal-free-multicast
> draft-ietf-teas-rsvp-egress-protection
> draft-ietf-teas-rsvp-ingress-protection
> I=E2=80=99ve scheduled these for the 3/8 telechat. Due to the heavy =
load, these may or may not be reviewed. The authors should ensure to =
timely answer any comments and upload a clean document if needed for the =
telechat review by 3/2. If the document has not been updated for dir =
review comments, I will need to move it to a future telechat.

draft-ietf-lisp-signal-free-multicast-08 is up to date and reflects the =
following comments:



Thanks,
Dino/Victor=

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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
line-break: after-white-space;"><blockquote type=3D"cite" class=3D"">I =
already had initiated Last Calls before the freeze for:<br =
class=3D""></blockquote><blockquote type=3D"cite" =
class=3D"">draft-ietf-lisp-signal-free-multicast<br =
class=3D"">draft-ietf-teas-rsvp-egress-protection<br =
class=3D"">draft-ietf-teas-rsvp-ingress-protection<br class=3D"">I=E2=80=99=
ve scheduled these for the 3/8 telechat. Due to the heavy load, these =
may or may not be reviewed. The authors should ensure&nbsp;to timely =
answer any comments and upload a clean document if needed for the =
telechat review by 3/2. If the document has not&nbsp;been updated for =
dir review comments, I will need to move it to a future =
telechat.</blockquote><br class=3D""><div =
class=3D"">draft-ietf-lisp-signal-free-multicast-08 is up to date and =
reflects the following comments:</div><div class=3D""><br =
class=3D""></div><div class=3D""><img apple-inline=3D"yes" =
id=3D"14DB0E65-9065-454F-87EA-9AFE0067DCBC" width=3D"449" height=3D"100" =
src=3D"cid:88A950EC-2881-4C1C-BC60-6E391D707556@wp.comcast.net" =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D"">Thanks,</div><div class=3D"">Dino/Victor</div></body></html>=

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References: <51b67c94-b1a2-316c-7936-f800a7f7acbf@pi.nu> <36109BFE-88CD-4F56-99ED-D44CE7286BC4@gmail.com> <03a901d3b0b2$38f25830$aad70890$@olddog.co.uk>
From: Lizhong Jin <lizho.jin@gmail.com>
Date: Thu, 1 Mar 2018 11:30:02 +0800
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To: adrian@olddog.co.uk
Cc: Loa Andersson <loa@pi.nu>, mpls <mpls@ietf.org>, draft-farrel-mpls-sfc@ietf.org, mpls-chairs <mpls-chairs@ietf.org>
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Subject: Re: [mpls] MPLS-RT review of draft-farrel-mpls-sfc
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Hi Adrian, see inline below. Thanks.

Lizhong

On Thu, Mar 1, 2018 at 12:36 AM, Adrian Farrel <adrian@olddog.co.uk> wrote:

> Thanks Lizhong,
>
>
>
> We could certainly look at adding more discussion on the scope of
> applicability. We don't want to get into a competitive discussion wrt NSH=
,
> but since NSH naturally has more functionality, we could highlight what y=
ou
> cannot do in MPLS.
>
>
>
> I'm curious about your implementation. You say "using per-packet metadata
> (strictly saying, it is per-flow)". What I read there is that the metadat=
a
> for packets on a flow was constant, but that you had multiple flows mixed
> together so that an SF that received a packet looked at the metadata
> carried by the packet rather than hashing to find the flow and then looki=
ng
> up the metadata. Do I have this right?
>
[Lizhong] Are you referring the flow identifier as metadata? The flow
identifier is only one of the metadata, and there is some other information
required to be carried between SFs, e.g., some classification result to the
next SF

>
>
> If I have understood you, then this is the same as the function in MPLS
> although there is an additional indirection. That is, each packet can car=
ry
> a pointer to its per flow metadata allowing multiple flows to be mixed an=
d
> avoiding the need for an SF to have to work out the specific flow through
> hashing.
>
[Lizhong] The indirection approach introduce additional per-flow state
configuration on SF, the table of metadata programmed by in-band/out-band
message. There will be more aspects need to be investigated, e.g., table
synchronization across all related SFs. While for some SF with NSH
approach, per-flow state maintenance is not required, and there is no
synchronization problem.
But the interesting thing is, if there are two many metadata required, an
indirection approach is preferred. So in some design, a mixed solution is
applied. The most frequent info is carried with packet, and also with an
metadata index to get less frequent info.

>
>
> However, true per-packet metadata allows the value of the metadata to var=
y
> on every packet. An example of this might be a CRC on the packet. NSH
> supports this, but our proposal does not.
>
[Lizhong] yes, and per packet info may also include timestamp, CRC checking
results, etc.

>
>
> Cheers,
>
> Adrian
>
>
>
> *From:* mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Lizhong Jin
> *Sent:* 28 February 2018 15:53
> *To:* Loa Andersson; mpls
> *Cc:* draft-farrel-mpls-sfc@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [mpls] MPLS-RT review of draft-farrel-mpls-sfc
>
>
>
> Hi all,
>
> This is an alternative for SFC implementation in MPLS network. Since it i=
s
> WG adoption, not last call, basically I believe the document is ready for
> adoption.
>
> And I have one concern to the solution regarding the metadata. There is n=
o
> per packet metadata like NSH, which will surely bring some restriction to
> the applications. I know some SFC application even does not require
> metadata, but I did one development of SFC application using per-packet
> metadata (strictly saying, it is per-flow) which is of course not under
> MPLS infrastructure.
>
> If possible, could authors add a section to describe what kind of
> capability this approach could achieve, and what could not compared with
> NSH. With that context, the operators could understand better, and easier
> to decide which solution to deploy.
>
>
>
> Regards
>
> Lizhong
>
> On 2/3/2018 14:02=EF=BC=8CLoa Andersson<loa@pi.nu> <loa@pi.nu> wrote=EF=
=BC=9A
>
> Matthew, Lizhong, Sam, and Mach,
>
> You have been selected as MPLS-RT reviewers for draft-farrel-mpls-sfc.
>
> Note to authors: You have been CC'd on this email so that you can know
> that this review is going on. However, please do not review your own
> document.
>
> Reviews should comment on whether the document is coherent, is it
> useful (ie, is it likely to be actually useful in operational networks),
> and is the document technically sound?
>
> We are interested in knowing whether the document is ready to be
> considered for WG adoption (ie, it doesn't have to be perfect at this
> point, but should be a good start). Please remember that it often is
> easier to progress the document when it has become a working group
> document. All comments in the MPLS-RT review needs to be addressed,
> but please think carefully about whether a comment is gating the
> adoption or could just as easily be addressed after the adoption.
>
> Reviews should be sent to the document authors, WG co-chairs and WG
> secretary, and CC'd to the MPLS WG email list. If necessary, comments
> may be sent privately to only the WG chairs.
>
> If you have technical comments you should try to be explicit about what
> needs to be resolved before adopting it as a working group document, and
> what can wait until the document is a working group document and the
> working group has the revision control.
>
> Are you able to review this draft by February 28, 2018? Please respond
> whether you are available to do the review in a timely fashion.
>
>
> Thanks, Loa
> (as MPLS WG co-chair)
> --
>
>
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert
> Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
>

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<div dir=3D"ltr"><div><div>Hi Adrian, see inline below. Thanks.<br></div><b=
r></div>Lizhong<br><div><div><div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Thu, Mar 1, 2018 at 12:36 AM, Adrian Farrel <span dir=
=3D"ltr">&lt;<a href=3D"mailto:adrian@olddog.co.uk" target=3D"_blank">adria=
n@olddog.co.uk</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 link=3D"blue" vlink=3D"purple" lang=3D"EN-GB"><div class=3D"m_-58418864641=
83962777WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:11.0p=
t;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">Tha=
nks Lizhong,<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;col=
or:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span sty=
le=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quo=
t;;color:#1f497d">We could certainly look at adding more discussion on the =
scope of applicability. We don&#39;t want to get into a competitive discuss=
ion wrt NSH, but since NSH naturally has more functionality, we could highl=
ight what you cannot do in MPLS.<u></u><u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;=
sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"=
MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:#1f497d">I&#39;m curious about your implementa=
tion. You say &quot;using per-packet metadata (strictly saying, it is per-f=
low)&quot;. What I read there is that the metadata for packets on a flow wa=
s constant, but that you had multiple flows mixed together so that an SF th=
at received a packet looked at the metadata carried by the packet rather th=
an hashing to find the flow and then looking up the metadata. Do I have thi=
s right?</span></p></div></div></blockquote><div>
[Lizhong] Are you referring the flow identifier as metadata? The flow=20
identifier is only one of the metadata, and there is some other information=
 required to=20
be carried between SFs, e.g., some classification result to the next SF

<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex"><div link=3D"blue" vlink=3D"purple=
" lang=3D"EN-GB"><div class=3D"m_-5841886464183962777WordSection1"><p class=
=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;;color:#1f497d"><u></u><u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></span></p><p=
 class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,&quot;sans-serif&quot;;color:#1f497d">If I have understood you, t=
hen this is the same as the function in MPLS although there is an additiona=
l indirection. That is, each packet can carry a pointer to its per flow met=
adata allowing multiple flows to be mixed and avoiding the need for an SF t=
o have to work out the specific flow through hashing. </span></p></div></di=
v></blockquote><div>
[Lizhong] The indirection approach introduce additional per-flow state conf=
iguration on SF, the table of metadata programmed by in-band/out-band messa=
ge. There will be more aspects need to be investigated, e.g., table synchro=
nization across all related SFs. While for some SF with NSH approach, per-f=
low state maintenance is not required, and there is no synchronization prob=
lem.<br></div><div>But the interesting thing is, if there are two many meta=
data required, an indirection approach is preferred. So in some design, a m=
ixed solution is applied. The most frequent info is carried with packet, an=
d also with an metadata index to get less frequent info.<br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex"><div link=3D"blue" vlink=3D"purple" lang=3D"EN-GB"><d=
iv class=3D"m_-5841886464183962777WordSection1"><p class=3D"MsoNormal"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;;color:#1f497d"><u></u><u></u></span></p><p class=3D"MsoNormal"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;;color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal=
"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;san=
s-serif&quot;;color:#1f497d">However, true per-packet metadata allows the v=
alue of the metadata to vary on every packet. An example of this might be a=
 CRC on the packet. NSH supports this, but our proposal does not.</span></p=
></div></div></blockquote><div>[Lizhong] yes, and per packet info may also =
include timestamp, CRC checking results, etc.<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex"><div link=3D"blue" vlink=3D"purple" lang=3D"EN-GB"><div class=3D=
"m_-5841886464183962777WordSection1"><p class=3D"MsoNormal"><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;col=
or:#1f497d"><u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;col=
or:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span sty=
le=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quo=
t;;color:#1f497d">Cheers,<u></u><u></u></span></p><p class=3D"MsoNormal"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-se=
rif&quot;;color:#1f497d">Adrian<u></u><u></u></span></p><p class=3D"MsoNorm=
al"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;s=
ans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></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 0=
cm 0cm"><p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-fami=
ly:&quot;Tahoma&quot;,&quot;sans-serif&quot;" lang=3D"EN-US">From:</span></=
b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans=
-serif&quot;" lang=3D"EN-US"> mpls [mailto:<a href=3D"mailto:mpls-bounces@i=
etf.org" target=3D"_blank">mpls-bounces@ietf.org</a>] <b>On Behalf Of </b>L=
izhong Jin<br><b>Sent:</b> 28 February 2018 15:53<br><b>To:</b> Loa Anderss=
on; mpls<br><b>Cc:</b> <a href=3D"mailto:draft-farrel-mpls-sfc@ietf.org" ta=
rget=3D"_blank">draft-farrel-mpls-sfc@ietf.org</a><wbr>; <a href=3D"mailto:=
mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a><br><b>Subj=
ect:</b> Re: [mpls] MPLS-RT review of draft-farrel-mpls-sfc<u></u><u></u></=
span></p></div></div><div><div class=3D"h5"><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p><div><div><div><p class=3D"MsoNormal"><span style=3D"font-=
family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91">Hi all,<u></u><u></u></span></=
p></div><div><p class=3D"MsoNormal"><span style=3D"font-family:=E5=BE=AE=E8=
=BD=AF=E9=9B=85=E9=BB=91">This is an alternative for SFC implementation in =
MPLS network.=C2=A0Since it is WG adoption, not last call, basically I beli=
eve the document is ready for adoption.<u></u><u></u></span></p></div><div>=
<p class=3D"MsoNormal"><span style=3D"font-family:=E5=BE=AE=E8=BD=AF=E9=9B=
=85=E9=BB=91">And I have one concern to the solution regarding the metadata=
. There is no per packet metadata like NSH, which will surely bring some re=
striction to the applications. I know some SFC application even does not re=
quire metadata, but I did one development of SFC application using per-pack=
et metadata (strictly saying, it is per-flow) which is of course not under =
MPLS infrastructure.<u></u><u></u></span></p></div><div><p class=3D"MsoNorm=
al"><span style=3D"font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91">If pos=
sible, could authors add a section to describe what kind of capability this=
 approach could achieve, and what could not compared with NSH. With that co=
ntext, the operators could understand better, and easier to decide which so=
lution to deploy.<u></u><u></u></span></p></div><div><p class=3D"MsoNormal"=
><span style=3D"font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91"><u></u>=
=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"fo=
nt-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91">Regards<u></u><u></u></span=
></p></div><div><p class=3D"MsoNormal"><span style=3D"font-family:=E5=BE=AE=
=E8=BD=AF=E9=9B=85=E9=BB=91">Lizhong<u></u><u></u></span></p></div></div><d=
iv style=3D"margin-top:33.75pt;margin-bottom:15.0pt;border-radius:3px"><div=
 style=3D"margin-left:7.5pt;margin-right:7.5pt"><p class=3D"MsoNormal" styl=
e=3D"background:#f2f2f2;word-break:break-all"><span style=3D"font-size:9.0p=
t;font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;color:black">On <span cl=
ass=3D"m_-5841886464183962777mail-date">2/3/2018 14:02</span></span><span s=
tyle=3D"font-size:9.0pt;font-family:&quot;MS Mincho&quot;;color:black">=EF=
=BC=8C</span><span style=3D"font-size:9.0pt;font-family:=E5=BE=AE=E8=BD=AF=
=E9=9B=85=E9=BB=91;color:black"><a href=3D"mailto:loa@pi.nu" target=3D"_bla=
nk"><span style=3D"color:#2a83f2;text-decoration:none">Loa Andersson&lt;loa=
@pi.nu&gt;</span></a> wrote</span><span style=3D"font-size:9.0pt;font-famil=
y:&quot;MS Mincho&quot;;color:black">=EF=BC=9A</span><span style=3D"font-si=
ze:9.0pt;font-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91;color:black"> <u>=
</u><u></u></span></p></div></div><blockquote id=3D"m_-5841886464183962777n=
tes-pcmail-quote"><p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;fo=
nt-family:=E5=BE=AE=E8=BD=AF=E9=9B=85=E9=BB=91">Matthew, Lizhong, Sam, and =
Mach,<br><br>You have been selected as MPLS-RT reviewers for draft-farrel-m=
pls-sfc.<br><br>Note to authors: You have been CC&#39;d on this email so th=
at you can know<br>that this review is going on. However, please do not rev=
iew your own<br>document.<br><br>Reviews should comment on whether the docu=
ment is coherent, is it<br>useful (ie, is it likely to be actually useful i=
n operational networks), <br>and is the document technically sound?<br><br>=
We are interested in knowing whether the document is ready to be<br>conside=
red for WG adoption (ie, it doesn&#39;t have to be perfect at this<br>point=
, but should be a good start). Please remember that it often is<br>easier t=
o progress the document when it has become a working group<br>document. All=
 comments in the MPLS-RT review needs to be addressed,<br>but please think =
carefully about whether a comment is gating the<br>adoption or could just a=
s easily be addressed after the adoption.<br><br>Reviews should be sent to =
the document authors, WG co-chairs and WG<br>secretary, and CC&#39;d to the=
 MPLS WG email list. If necessary, comments<br>may be sent privately to onl=
y the WG chairs.<br><br>If you have technical comments you should try to be=
 explicit about what<br>needs to be resolved before adopting it as a workin=
g group document, and<br>what can wait until the document is a working grou=
p document and the<br>working group has the revision control.<br><br>Are yo=
u able to review this draft by February 28, 2018? Please respond<br>whether=
 you are available to do the review in a timely fashion.<br><br><br>Thanks,=
 Loa<br>(as MPLS WG co-chair)<br>-- <br><br><br>Loa Andersson =C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0email: <a href=3D"mailto=
:loa@pi.nu" target=3D"_blank">loa@pi.nu</a><br>Senior MPLS Expert<br>Huawei=
 Technologies (consultant) =C2=A0=C2=A0=C2=A0=C2=A0phone: +46 739 81 21 64<=
u></u><u></u></span></p></blockquote></div></div></div></div></div></div></=
blockquote></div><br></div></div></div></div></div>

--000000000000a4ec0f0566517978--


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------=ALIBOUNDARY_18761_56028940_5a97b2dc_1c8f63--

