Date/Time: Monday Session II, July 21, 2025 12:00 - 13:00 (local)
Room: Hidalgo
Chairs: Tarek Saad/Tony Li/Adrian Farrel
Secretary: Mach Chen
Slides:
Codimd for Notes Taking:
Meetecho:
Zulip:
Agenda:
WG Status Update (Agenda Bashing) - 12:00
Duration: 5 mins
Presenter: WG Chairs
Slides
[Tarek]: There was a recent revision posted for mna-hdr draft
posted. Authors are willing to give a quick update on the mic now.
[Rakesh]: The recent update addresses all received feedbacks, any
further review and feedbacks are welcome.
[Adrian]: So you think this is ready?
[Rakesh]: Yes
[Adrian]: Anyone in the meeting want to disagree with that?
[Silence]: No disagreement in the room.
[Adrian]: OK. Tarek as shepherd will do the next step.
[Rakesh]: Note on the slide, the document name is
"draft-ietf-mpls-mna-ps-hdr" not "draft-ietf-mpls-ps-mna-hdr".
YANG Data Model for MPLS mLDP - 12:05
ID: https://datatracker.ietf.org/doc/draft-ietf-mpls-mldp-yang-13
Duration: 7 mins
Presenter: Kamran Raza
Slides
[Kamran]: Presents update on the document. Further meeting with
RTGDIR reviewer is being sought to close on all discussion points.
[Adrian]: When you do the next update, please fix the company
affiliation issue and clean ID nits.
[Kamran]: That was part of version 10, but will definitely do one
more on that.
[Tarek]: Please consider involving the WG on the recent seemingly
'controversial' dicussion points raised during the RTG review.
[Kamran]: There are recursive effect related comments, I'm still
trying to finalize those. If there is anything that needs WG input,
we will share with the wider list. In addition, will meet with
Jeffery in person during the meeting to close last couple of points
regardin the recursive effect. How we model this in the current
model is what we're debating, it's related to the base mLDP specs.
[Tarek]: There is another discussion point on opaque data, should
it be interpreted or not? I don't know if that is closed or not.
[Kamran]: That's part of the recursive issue as well, and we will
discuss it.
MPLS Network Action for Deterministic Latency - 12:12
ID:
https://datatracker.ietf.org/doc/draft-sxg-mpls-mna-deterministic-latency-03
Duration: 5 mins
Presenter: Xueyan Song
Slides
[Xueyan]: Presents the history and update.
[...] No questions or comments received.
Signaling MNA Capabilities Using IGP - 12:17
ID:
https://datatracker.ietf.org/doc/draft-ihlesong-mpls-mna-signaling-00
Duration: 5 mins
Presenter: Fabian Ihle
Slides
[Fabian]: Presents.
[Jim Guichard]: The encoding (those ISIS related extensions) needs
to be pursued in the LSR WG.
[Fabian]: Agree.
[Mathew Bocci]: 1. Capabilities and RLD are not same thing, we
have always separated that in the past for entroy label for example.
2. The capability to accept the bSPL is different from the
capability to support particular opcodes, I didn't see anyting in
the draft about do I support MNA at all. 3. I think we also need an
inter-domain solution, not just a single domian soltuion for the
IGP, signaling in RSVP-TE is what we've doen in the past.
[Fabian]: All good points.
[Greg Mirsky]: It seems that this information is not dynamic, if
so, maybe doing it with IGP is not a good idea. Maybe YANG is an
option, rather than using LSP Ping to do on path discovery
collectiing information about capabilities. In addition, since ISIS
is more restrictive on the size, if doing IGP based capability
advertisement, it's better to use 8 bits rather than 16 bits.
[Fabian]: Agree.
MPLS Network Action for Stack Management - 12:22
ID:
https://datatracker.ietf.org/doc/draft-ihle-mpls-mna-stack-management-00
Duration: 10 mins
Presenter: Fabian Ihle
Slides
[Fabian]: Presents.
[...] No questions or comments raised.
Stateless MNA-based Egress Protection (SMEP) - 12:32
ID:
https://datatracker.ietf.org/doc/draft-ihle-mpls-mna-stateless-egress-protection-01
Duration: 10 mins
Presenter: Fabian Ihle
Slides
[Fabian]: Presents.
[Tarek]: Mechanism seems generic enough to be applicable to
protecting egress and transit LSRs - hence maybe generalize the name
of the draft?
[Fabian]: Yes, it is generically applicable to the LSR
merge-point. Will consider if this is desirable for transit LSRs
too.
[Joel]: Processing of the pop-n action - is the condition to
trigger encoded in the NAS?
[Fabian]: Yes, good point, it is possible to encode such
additional conditions by using a single bit of the reserved bits.
MNA for Metadata in SR-MPLS Service Programming - 12:42
ID:
https://datatracker.ietf.org/doc/html/draft-liu-mpls-mna-sr-service-metadata-01
Duration: 5 mins
Presenter: Yao Liu
Slides
[Yao Liu]: Presents.
[Adrian]: Doesn't look like we have any question, this is still
quite early work. I'd like people to read it and discuss it on the
list.
Explicit Congestion Notification Using MPLS Network Actions - 12:47
ID: https://datatracker.ietf.org/doc/html/draft-halmir-mpls-ecn-00
Duration: 10 mins
Presenter: Greg Mirsky
Slides
[Greg Mirsky]: Presents and asks for WG adoption.
[Adrian]: How is this proposal better than existing ECN
mechanisms?
[Greg]: MPLS does not support ECN. Using MNA to support ECN is
better than not supporting ECN in MPLS domain.