Re: [mpls] [Pals] IPR poll for draft-jain-pals-p2mp-pw-lsp-ping

Gregory Mirsky <gregory.mirsky@ericsson.com> Mon, 09 May 2016 17:57 UTC

From: Gregory Mirsky <gregory.mirsky@ericsson.com>
To: "Andrew G. Malis" <agmalis@gmail.com>, "pals@ietf.org" <pals@ietf.org>, "draft-jain-pals-p2mp-pw-lsp-ping@ietf.org" <draft-jain-pals-p2mp-pw-lsp-ping@ietf.org>
Thread-Topic: [Pals] IPR poll for draft-jain-pals-p2mp-pw-lsp-ping
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Date: Mon, 09 May 2016 17:56:53 +0000
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Subject: Re: [mpls] [Pals] IPR poll for draft-jain-pals-p2mp-pw-lsp-ping
Precedence: list

Thought most of MPLS group subscribed to PALS, adding it explicitly.

From: Gregory Mirsky
Sent: Monday, May 09, 2016 10:56 AM
To: 'Andrew G. Malis'; pals@ietf.org; draft-jain-pals-p2mp-pw-lsp-ping@ietf.org
Subject: RE: [Pals] IPR poll for draft-jain-pals-p2mp-pw-lsp-ping

Dear Authors, et. al,
though the adoption call had not yet started, please consider my notes in the that context.
I’ve read the draft and support its adoption.
Now to comments:

·         Introduction states “P2MP PWs are carried over P2MP MPLS LSP”. But RFC 7338 states that p2mp PW MAY support return path which makes it bi-directional or E-Tree-like. Then p2mp LSP cannot serve as transport since  MPLS LSPs, in general, are unidirectional objects. Even in MPLS-TP p2mp LSP is unidirectional and only p2p LSP may be bidirectional. Should it be a tunnel, rather than MPLS LSP?

·         I think that it would be beneficial to discuss and demonstrate why FEC 129 PW cannot be used, re-used for p2mp PW.

·         could appropriate p2p LSP FEC and p2mp pw FEC be combined?

·         Section 5:

o   Is IPv4 the only address family to be supported? AFAIK, IPv6 address family may be used as well and thus ACH 0x0057 used

o   There’s no need to use GAL when sending OAM packets over PW VCCV as PW ACH identifies the PW VCCV

·         Which return paths can be used for Echo Reply? I believe that because RFC 7338 states that p2mp PW may be bi-directional, there may be alternative to Reply Mode value 2, i.e. out-band reply over IPv4/IPv6 network.

Regards,
                        Greg

From: Pals [mailto:pals-bounces@ietf.org] On Behalf Of Andrew G. Malis
Sent: Monday, May 09, 2016 7:47 AM
To: pals@ietf.org<mailto:pals@ietf.org>; draft-jain-pals-p2mp-pw-lsp-ping@ietf.org<mailto:draft-jain-pals-p2mp-pw-lsp-ping@ietf.org>
Subject: [Pals] IPR poll for draft-jain-pals-p2mp-pw-lsp-ping

Working Group,

https://tools.ietf.org/html/draft-jain-pals-p2mp-pw-lsp-ping-01 has been
requested for PALS working group adoption.

We will conduct an IPR poll before the adoption poll is started.

Are you aware of any IPR that applies to draft-jain-pals-p2mp-pw-lsp-ping?

If so, has this IPR been disclosed in compliance with IETF IPR rules
(see RFCs 3979, 4879, 3669 and 5378 for more details)?

There are no IPR disclosures currently filed against this document.

If you are listed as a document author or contributor please respond to
this email regardless of whether or not you are aware of any relevant
IPR. *The response needs to be sent to the PALS WG email list.* The
document will not advance to the next stage until a response has been
received from each author and contributor.

If you are on the PALS WG email list but are not listed as an author or
contributor, then please explicitly respond only if you are aware of any
IPR that has not yet been disclosed in conformance with IETF rules.

This call will remain open until we’ve heard back from all of the authors and contributors.

Thanks,
Andy

Re: [mpls] [Pals] IPR poll for draft-jain-pals-p2… Gregory Mirsky