Hi Gyan,
If I understand you right, in the virtualization scenario, eventually there
would be some way to tell virtual routing instances apart from the routing
protocol's perspective, either they can be treated as different routers with
different router ID (taking OSPF as an example), or they share the same routing
protocol instance, but own different virtual/sub ports, similar as the line
card case. In the first case, the per-node MSD is applicable, in the latter
case, the per-link MSD would work.
Is there a third situation?
Thanks,
Yao
Original
From: GyanMishra <[email protected]>
To: Tony Li <[email protected]>;
Cc: Les Ginsberg <[email protected]>;刘尧00165286;[email protected]
<[email protected]>;mpls <[email protected]>;
Date: 2023年08月29日 11:03
Subject: Re: [Lsr] New Version Notification for
draft-liu-lsr-mpls-inspection-msd-01.txt
Hi Tony
Would the granularity you would want for the modular node that is now
virtualized into virtual routing instances be on per routing instance level.
Each vendor has a different flavor of how this virtualization is done.
So the MSD capability would be at that level.
Kind Regards
Gyan
On Mon, Aug 28, 2023 at 10:36 PM Tony Li <[email protected]> wrote:
Hi Yao,
Please consider the case of a modular node with a number of different line
cards, where the line cards are based on different forwarding engines.
RLD needs to be link specific.
Regards,
Tony
On Aug 28, 2023, at 6:55 PM, <[email protected]> <[email protected]>
wrote:
Hi Les,
Thanks a lot for your review and comments.
This new MSD is a per-node capability just like ERLD-MSD, mainly because it
represents how many MPLS labels the node can read, and it is not related with
the links.
And the description in this draft you mentioned is written taking example by
RFC9088(section 4. Advertising ERLD Using IS-IS).
I'll explicitly state the scope of the new MSD in the next version.
Best Regards,
Yao
Original
From: LesGinsberg(ginsberg) <[email protected]>
To: 刘尧00165286;[email protected] <[email protected]>;[email protected] <[email protected]>;
Date: 2023年08月28日 20:57
Subject: RE: [Lsr] Fw: New Version Notification for
draft-liu-lsr-mpls-inspection-msd-01.txt
Yao –
Both RFC 8476(OSPF) and RFC 8491(IS-IS) define MSD advertisements with per-link
scope and per-node scope.
Your draft only states:
“If a router has multiple interfaces with different capabilities of
reading the maximum label stack depth, the router MUST advertise the
smallest value found across all its interfaces.”
This suggests that you intend only to advertise a per-node capability – but as
you don’t explicitly state that – and you don’t provide a reason why a per link
capability isn’t applicable, I am unclear as to what your intentions are here.
Could you clarify whether you intend to support both per link and per node
capability – and if not why not?
Thanx.
Les
From: Lsr <[email protected]> On Behalf Of [email protected]
Sent: Monday, August 28, 2023 12:33 AM
To: [email protected]; [email protected]
Subject: [Lsr] Fw: New Version Notification for
draft-liu-lsr-mpls-inspection-msd-01.txt
Hi All,
A new version of draft-liu-lsr-mpls-inspection-msd has just been uploaded.
In this document, a new type of MSD is defined to reflect the Readable Label
Depth(RLD), which helps in the MPLS MNA solution.
In this version, the main update is that some description is added to explain
why a new MSD is preferred instead of the ERLD-MSD.
Currently this new MSD is called Base MPLS Inspection MSD, it may be changed to
a more straightforward name like RLD-MSD based on the description in the MNA
architecture/solution document.
Your comments and suggestions are more than welcome!
Thanks,
Yao
Original
From: [email protected] <[email protected]>
Date: 2023年08月28日 14:55
Subject: New Version Notification for draft-liu-lsr-mpls-inspection-msd-01.txt
A new version of Internet-Draft draft-liu-lsr-mpls-inspection-msd-01.txt has
been successfully submitted by Yao Liu and posted to the
IETF repository.
Name: draft-liu-lsr-mpls-inspection-msd
Revision: 01
Title: Signaling Base MPLS Inspection MSD
Date: 2023-08-27
Group: Individual Submission
Pages: 7
URL:
https://www.ietf.org/archive/id/draft-liu-lsr-mpls-inspection-msd-01.txt
Status: https://datatracker.ietf.org/doc/draft-liu-lsr-mpls-inspection-msd/
HTML:
https://www.ietf.org/archive/id/draft-liu-lsr-mpls-inspection-msd-01.html
HTMLized:
https://datatracker.ietf.org/doc/html/draft-liu-lsr-mpls-inspection-msd
Diff:
https://author-tools.ietf.org/iddiff?url2=draft-liu-lsr-mpls-inspection-msd-01
Abstract:
This document defines a new type of MSD, Base MPLS Inspection MSD to
reflect the Readable Label Depth(RLD), and the mechanism to signal
this MSD using IGP and BGP-LS.
The IETF Secretariat
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Gyan Mishra
Network Solutions Architect
Email [email protected]
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