[mpls] draft mpls wg minutes

[Loa Andersson <[e-mail]>]

All,

this is a draft version of the mpls working group notes from the
Paris meeting. I would like to ask especially people that made
presentation to review the agenda items that relates to their
presentaions. Comments to me and/or the list before eob Tue Aug 23rd.

Also make sure I've all slides that were used. If you are
uncertain - please send!

/Loa

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



Multi-Protocol Label Switching WG (mpls)

MONDAY, August 1 at 10:30 - 12:30
=================================

CHAIRS: Loa Andersson <[e-mail]>
         George Swallow <[e-mail]>

AGENDA:

1.  ICMP interactions with MPLS
===============================
<http://www.ietf.org/proceedings/01aug/I-D/draft-ietf-mpls-icmp-02.txt>
Ron

Ron gave a short background; ICMP as specified in RFC792, does not have 
a mechanism to report MPLS header information when a router fails to 
deliver a packet. The MPLS WG processed a draft on MPLS extensions (an 
object to report the MPLS header) for ICMP and requested that the draft 
should be published as an RFC on the Standards track. The IESG decided 
not to publish it because of "layer violation". However the draft has 
been widely implemented and is an integrated part of most MPLS 
implementations.
The draft has now been resurrected < draft-ietf-mpls-icmp-03>, and the 
discussion is what work we need to undertake get it published.
It was pointed out that we can’t change anything in the technical 
details. This needs to be coordinated with the Internet Area, and one
Suggestion is to move the parts that are not MPLS specific into a draft 
that the Internet Area will progress, while the MPLS specific parts goes 
through the MPLS working group.
Ron will discuss this in the Internet Area meeting and we will await the 
outcome of this discussion.

2.  Agenda bashing
==================
Apart from moving the discussion on MPLS ICMP, to the top of the agenda 
to make possible for Ron to present the same topic in the Internet Area 
meeting (taking place at the same time), there were no other changes in 
agenda.

3.  Working group status
========================
Working group chairs reported on the status of working group documents:

Parking Place
-------------
We have a new “parking place”, i.e. a web site that lists all documents 
that IESG have approved to be published as RFCs. The parking place is 
located at:

http://rtg.ietf.org:8080/Test/parking

New RFCs from the MPLS working group since last meeting:
-------------------------------------------------------
RFC 4090 Fast Reroute Extensions for RSVP-TE for LSP Tunnels

Working group documents in RFC-ed queue:
----------------------------------------
draft-ietf-mpls-lsp-hierarchy-08.txt (2002-04-11!)
draft-ietf-mpls-bundle-06.txt
draft-ietf-mpls-telink-mib-07.txt
draft-ietf-mpls-explicit-null-02.txt
draft-ietf-mpls-mgmt-overview-09.txt

We have documents that have been stuck in the RFC-editors queue for some 
time. Actually the oldest document in the queue comes from the MPLS 
working group.

Working group documents in parking place:
-----------------------------------------
None

Working group documents in IESG review:
---------------------------------------
draft-ietf-mpls-ecmp-bcp-01.txt (publication requested)
draft-ietf-mpls-lc-if-mib-06.txt (new ID needed)
draft-ietf-mpls-lsp-ping-09.txt (new ID needed)
draft-ietf-mpls-nodeid-subobject-05.txt (ietf last call)
draft-ietf-mpls-bgp-mpls-restart (IESG evaluation)
draft-ietf-mpls-rsvpte-attributes (IESG evaluation)

MPLS working group drafts:
--------------------------
draft-ietf-mpls-lsr-self-test
draft-ietf-mpls-oam-frmwk
draft-ietf-mpls-oam-requirements-06.txt (dated)
draft-ietf-mpls-over-l2tpv3
draft-ietf-mpls-p2mp-sig-requirement
draft-ietf-mpls-rsvp-te-p2mp
draft-ietf-mpls-rfc3036bis-01.txt (dated)
draft-ietf-mpls-soft-preemption


4.  LDP to Draft Standards
==========================
<draft-ietf-mpls-rfc3036bis-01.txt>
<draft-minei-ldp-operational-experience-01.txt>
Ina

draft-ietf-mpls-rfc3036bis-01.txt has gone through minor editing and is 
ready for WG last call.

draft-minei-ldp-operational-experience-01.txt has been refreshed, it is 
a required informational reference for advancing the BIS draft. Please 
provide this draft with in depth review.

One additional draft - protocol analysis - is also required (RFC 1264) 
to take LDP to draft standard to receive in depth review.
The packages we need to prepare for taking LDP to Draft Standard also 
include <draft-thomas-mpls-ldp-survey2002-00.txt>.

Working group chairs will start the Working Last Call on the LDP 
document and poll the list for making the implementation survey and the 
operational experiences working group documents.

5.  MPLS OAM
============

LSR Self Test
-------------
<draft-ietf-mpls-lsr-self-test>
George

This draft has been waiting for the LSP Ping to clear working last call. 
This has now happened and after minor changes it is ready go to working 
group last call.


P2MP LSP Ping
-------------
<draft-yasukawa-mpls-p2mp-lsp-ping-02.txt>
Adrian

Since the meeting in Minneapolis a new work from Bill Fenner (new 
co-author) has been added and the objectives have been made more 
precise. Currently it is possible to ping one specific leaf or the whole 
tree.
There was a good support for making it a working group document. Working 
group chairs will confirm this based on input on the working group 
mailing list.

<draft-nadeau-mpls-interas-lspping-00.txt>
Tom

The draft addresses issues for using the base LSP Ping in Inter AS 
contexts. Although there is a need to complete some sections of the 
draft the authors ask for feedback. One problem with using base LSP Ping 
is that the IP address found in the packet need not be routable if the 
forwarding failure occurs in an AS to which the AS where the packet 
originates does not announce the address that is found “under” the MPLS 
label. The indicated solution is to record the ASBR that the LSP Ping 
packet passes through, and if a failure occurs return the packet to the 
ASBR.

P2MP OAM requirements
---------------------
draft-yasukawa-mpls-p2mp-oam-reqs-00.txt
Tom
The document addresses issues on how to detect and report data plane 
failures. Tom thinks that the document is a little rough; it needs a 
clarification and additional review. The P2MP OAM requirements should go 
into a document of its own and needs to address both diagnostic and 
periodic OAM. Input from Service Providers and careful review is important.
Loa asked who has read and who supported this to become a working group 
document. Among those who have read the document there is a good support 
for making it a working group document. Needs to be confirmed on the list.

6.  MPLS Multicast and MPLS P2MP
================================
<draft-ietf-mpls-rsvp-te-p2mp-02.txt>
Rahul

Rahul said that version -02 was recently published, according the 
authors it is not entirely ready for last called and a version -03 is 
planned. The working group should take the opportunity to read and comment.

<draft-rosen-mpls-multicast-encaps-00.txt>
<draft-raggarwa-mpls-upstream-label-00.txt>
<draft-raggarwa-mpls-rsvp-ldp-upstream-00.txt>
Rahul

The background is that there is some inconsistency between what RFC3032 
says about multicast and unicast, and the actual requirements. The three 
drafts discuss separate aspects of this and propose mechanisms solutions 
to some of the problems.
One of the mechanisms that are introduced is upstream label allocation 
(UAL). The drafts also concluded that it is not necessary to have one 
code point allocated for unicast and one for multicast, since this is 
given by context in the NHLFE.
Conclusion is that there is some need to revisit how code points have 
been assigned. Instead of assigning one code point for unicast (8847) 
and one for multicast (8848), the draft suggests that the code points 
are used for downstream allocated (8847) and upstream allocated (8848).
The concept of “Neighbor specific labels” is introduced since this is 
required for support of upstream assigned labels. With UAL - the context 
of a label is derived from the neighbor from whom the labeled packet was 
sent.

The chairs asked how many had read the drafts and who thought they need 
to become working group drafts. Neither the amount of people who have 
read the drafts nor the support for making them working group drafts was 
conclusive.

The working group chairs will take steps to initiate a discussion on the 
mailing list. Adrian pointed out that the LDP and RSVP-TE aspects are 
split out in separate drafts. The working group co-chairs strongly 
supported this. Authors agreed to this.

MPLS Multicast
--------------
<draft-leroux-mpls-mp-ldp-reqs-01.txt>
Jean-Louis
Jean-Louis discussed the multicast requirements that are emerging
in MPLS VPN applications. Extending LDP is a fairly low complexity route 
to support P2MP LSP setup requirements.

The discussion brought up issues like why it is appropriate to have a
leaf-initiated protocol in the p2mp case when this was not the case in 
the TE case. The benefits of shared trees vs. source based trees were 
discussed.

George pointed out that some of the requirements are on the IGP routing 
rather than MPLS or LDP.

Since this work is not captured in the working group milestones we need 
to ask the ADs if we can update the working group charter. Only after 
that we can accept this as a working group document.

George asked for a sense of how many people were interested
in doing this work in this WG. Many hands were raised. The working group 
chairs will bring this to the ADs.

<draft-minei-mpls-ldp-p2mp-01.txt>
Ina
To extend LDP for p2mp is an attractive option since LDP is widely 
deployed. In these networks there might be a need for p2mp LSPs, but 
deploying RSVP-TE might be considered too much of a cost.

<draft-wijnands-mpls-ldp-mcast-ext-00.txt>
Ice
This draft also proposes extensions to LDP for multicast, there seems to 
be enough overlap between two drafts to look into if there is a 
possibility to merge them into one. The author agreed to this.

BGP Point to Multipoint LSP
---------------------------
<draft-satoru-mpls-bgp-multipoint-01.txt>
Satoru Matsushima

Due to lack of time it was not possible to make this presentation.

6.  Inter-AS LDP
================
<draft-decraene-mpls-ldp-interarea-00.txt>
Bruno
Due to lack of time it was not possible to make this presentation.

7.  End of meeting



-- 
Loa Andersson

Principal Networking Architect
Acreo AB                           phone:  [phone]
Isafjordsgatan 22                  mobile: [phone]
Kista, Sweden                      email:  [e-mail]
                                            [e-mail]

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