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Re: [Pce] I-D Action: draft-ietf-pce-segment-routing-policy-cp-11.txt

"Mike Koldychev (mkoldych)" <mkoldych@cisco.com> Tue, 20 June 2023 17:27 UTC

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From: "Mike Koldychev (mkoldych)" <mkoldych@cisco.com>
To: "pce@ietf.org" <pce@ietf.org>
Thread-Topic: [Pce] I-D Action: draft-ietf-pce-segment-routing-policy-cp-11.txt
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Archived-At: <https://mailarchive.ietf.org/arch/msg/pce/zCLTNviEO130LZXJ_IBRgXOwoFM>
Subject: Re: [Pce] I-D Action: draft-ietf-pce-segment-routing-policy-cp-11.txt
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Hi WG,

Adding some enhancements to the draft:

* Added SR-POLICY-CAPABILITY TLV to signal whether a PCEP peer supports the extra TLVs/mechanisms that are defined in the draft.
* Added a section about making Stateless PCEP (PCReq/PCRep) OPTIONAL for SR Policy, thus updating RFC 8231.
  * Stateful bringup was previously in pce-operational draft, where it was for ALL LSP types. But defining it for all LSP types may not be a wise choice because the scope is very large. PCEP has many applications and new ones will be added.
  * To reduce the scope of the update to RFC8231, we allow stateful bringup on a per-application basis, rather than PCEP-wide.

Thanks,
Mike.

-----Original Message-----
From: Pce <pce-bounces@ietf.org> On Behalf Of internet-drafts@ietf.org
Sent: Tuesday, June 20, 2023 1:15 PM
To: i-d-announce@ietf.org
Cc: pce@ietf.org
Subject: [Pce] I-D Action: draft-ietf-pce-segment-routing-policy-cp-11.txt


A New Internet-Draft is available from the on-line Internet-Drafts directories. This Internet-Draft is a work item of the Path Computation Element (PCE) WG of the IETF.

   Title           : PCEP extension to support Segment Routing Policy Candidate Paths
   Authors         : Mike Koldychev
                     Siva Sivabalan
                     Colby Barth
                     Shuping Peng
                     Hooman Bidgoli
   Filename        : draft-ietf-pce-segment-routing-policy-cp-11.txt
   Pages           : 22
   Date            : 2023-06-20

Abstract:
   A Segment Routing (SR) Policy [RFC9256] is a non-empty set of SR
   Candidate Paths, that share the same <headend, color, endpoint>
   tuple.  This document extends [RFC8664] to fully support the SR
   Policy construct.  SR Policy is modeled in PCEP as an Association of
   one or more SR Candidate Paths.  PCEP extensions are defined to
   signal additional attributes of an SR Policy, which are not covered
   by [RFC8664].  The mechanism is applicable to all data planes of SR
   (MPLS, SRv6, etc.).

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-pce-segment-routing-policy-cp/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-pce-segment-routing-policy-cp-11

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-pce-segment-routing-policy-cp-11

Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts


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