Hi Lou, Dimitri, JP,
draft-ietf-mpls-gmpls-lsp-reroute doesn't explicitly include or
exclude P2MP LSPs, but I think most of the function applies equally
to both P2P and P2MP. I'd like to suggest a couple of tweaks for
explicit P2MP support.
1. Section 2.3 recommends that ingress nodes use make-before-break
for rerouting:
... When an
alternate path is identified, a corresponding make-before-break LSP
SHOULD be initiated, and standard make-before-break procedures MUST
be followed.
For P2MP LSPs, the PathErr will only apply to one sub-group (or a
subset of the S2L sub-LSPs in a sub-group). It would therefore be
more efficient to use sub-group-based re-optimization (RFC 4875
section 14.2) rather than make-before-break.
2. Section 2.2 of your draft states that transit nodes MUST use
"standard local repair processing":
When the reroute request can be processed locally, standard local
repair processing MUST be followed.
For P2MP LSPs, I think that means sub-group-based
re-optimization. If you agree, it would be helpful to state it
explicitly. If not, please could you clarify.
Thanks,
Nic
-----Original Message-----
From: mpls-bounces at ietf.org [mailto:mpls-bounces at ietf.org] On Behalf
Of Loa Andersson
Sent: 20 October 2008 22:52
To: mpls at ietf.org
Cc: Ross Callon; Cisco - David Ward
Subject: [mpls] last call on three mpls wg documents
Working group,
the authors of
draft-ietf-mpls-gmpls-lsp-reroute-02.txt
draft-ietf-mpls-soft-preemption-13.txt
draft-ietf-mpls-3209-patherr-03.txt
has asked that we issue a working group last call on these document
as a group. This mail starts the wg last call.
There has gone quite an effort to align the three document and to
create a coherent structure.
The working group last call will end on Nov 7.
Please send comments to the working group mailing-list or to the
working group co-chairs.
/Loa
--
Loa Andersson
Principal Networking Architect
Acreo AB phone: +46 8 632 77 14
Isafjordsgatan 22 mobile: +46 739 81 21 64
Kista, Sweden email: loa.andersson at acreo.se
loa at pi.nu
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