Re: [Idr] Adoption Call for draft-zhang-idr-sr-policy-metric-05 (10/20 to 11/6/2023)

[Jingrong Xie <[e-mail]>]

Hi WG:

I support the adoption.
I think the Metric added to a Segment List (in addition to the Weight) is very useful for the use of the SR policy technology. My understanding is through the overall procedure in the introduction of the draft:
(The metric of a Segment List is) calculated by path computation element, delivered to the head node of the device by BGP Update Message, and used by the ingress node to select between multiple SR Policy paths.

Thanks,
Jingrong

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From: Idr [mailto:[e-mail]] On Behalf Of Susan Hares
Sent: Saturday, October 21, 2023 1:49 AM
To: [e-mail]
Subject: [Idr] Adoption Call for draft-zhang-idr-sr-policy-metric-05 (10/20 to 11/6/2023)

This begins a 2-week WG adoption call for draft-zhang-idr-sr-policy-metric-05.txt.
https://datatracker.ietf.org/doc/html/draft-zhang-idr-sr-policy-metric-05

The authors of this draft (Ka Zhang, Jie Dong, and Ketan Talaulikar) should respond to this email
And indicate whether they know of any IPR related to this draft.

This draft proposes adding a “metric” field for each segment list for
SR Policy candidate paths in addition to the existing “weight field”
described by the tunnel attribute for the SR Policy tunnel type:

              Tunnel Type: SR Policy
                 Binding SID
                 Preference
                 Priority
                 Policy Name
                 Policy Candidate Path Name
                 Explicit NULL Label Policy (ENLP)
                 Segment List
                     Weight
                     Metric
                     Segment
                     Segment


As you discuss adopting this draft, consider:


  1.  Do the segment lists need both a weight and a metric?
  2.  Does this draft provide clear instructions on how to process a segment list that has both weight and metric?
  3.  Is this feature needed for SR Policy Candidate routes?

Cheerily, Sue