[Pce] Re: I-D Action: draft-ietf-pce-sid-algo-09.txt

"Samuel Sidor (ssidor)" <ssidor@cisco.com> Fri, 07 June 2024 12:11 UTC

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From: "Samuel Sidor (ssidor)" <ssidor@cisco.com>
To: "Samuel Sidor (ssidor)" <ssidor=40cisco.com@dmarc.ietf.org>
Thread-Topic: [Pce] Re: I-D Action: draft-ietf-pce-sid-algo-09.txt
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Date: Fri, 07 Jun 2024 12:11:50 +0000
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Subject: [Pce] Re: I-D Action: draft-ietf-pce-sid-algo-09.txt
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Hi PCE WG,

In latest version of the draft, 3 new metric types are introduced:
- P2P and P2MP Bandwidth metric type (2 separate metric types)
- User defined metric types

Since operator can use multiple "user-defined" metrics in the topology in IGP, each of them will use different metric type from range 128-255, which is allocated for such purposes. See proposed metric type values in IGP:
https://www.ietf.org/archive/id/draft-ietf-lsr-flex-algo-bw-con-12.html#name-igp-metric-type-registry

Since only simple way to map between user-defined IGP metric types and PCEP metric types is to use same metric type range and 1:1 mapping between them, we are allocating it in PCEP as well.

We have a plan to ask for early IANA codepoint allocation for those metric types soon (to avoid any potential conflicting allocation in PCEP metric types registry, which would complicate mapping in the future), so please check updated version of the draft and provide any feedback.

Thanks a lot,
Samuel

-----Original Message-----
From: Samuel Sidor (ssidor) <ssidor=40cisco.com@dmarc.ietf.org> 
Sent: Friday, June 7, 2024 11:39 AM
To: pce@ietf.org
Subject: [Pce] Re: I-D Action: draft-ietf-pce-sid-algo-09.txt

Hi PCE WG,

FYI: Updated version introduced new PCEP metric types to be able to encode metric types introduced in IGP as part of:
https://datatracker.ietf.org/doc/draft-ietf-lsr-flex-algo-bw-con/

Regards,
Samuel

-----Original Message-----
From: internet-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Friday, June 7, 2024 11:35 AM
To: i-d-announce@ietf.org
Cc: pce@ietf.org
Subject: [Pce] I-D Action: draft-ietf-pce-sid-algo-09.txt

Internet-Draft draft-ietf-pce-sid-algo-09.txt is now available. It is a work item of the Path Computation Element (PCE) WG of the IETF.

   Title:   Carrying SR-Algorithm information in PCE-based Networks.
   Authors: Samuel Sidor
            Alex Tokar
            Shaofu Peng
            Shuping Peng
            Andrew Stone
   Name:    draft-ietf-pce-sid-algo-09.txt
   Pages:   22
   Dates:   2024-06-07

Abstract:

   The SR-Algorithm associated with a Prefix Segment-ID (SID) defines
   the path computation algorithm used by Interior Gateway Protocols
   (IGPs).  This information is available to controllers such as the
   Path Computation Element (PCE) via topology learning.  This document
   proposes an approach for informing headend routers regarding the SR-
   Algorithm associated with each Prefix SID used in PCE-computed paths,
   as well as signalling a specific SR-Algorithm as a constraint to the
   PCE.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-pce-sid-algo/

There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-pce-sid-algo-09

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-pce-sid-algo-09

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


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