I-D Action: draft-li-idr-sr-policy-metric-04.txt

internet-drafts@ietf.org Mon, 10 August 2026 07:05 UTC

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Subject: I-D Action: draft-li-idr-sr-policy-metric-04.txt
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Internet-Draft draft-li-idr-sr-policy-metric-04.txt is now available.

   Title:   BGP SR Policy Extensions for Performance-Aware Path Selection
   Authors: Zhenqiang Li
            Liyan Song
   Name:    draft-li-idr-sr-policy-metric-04.txt
   Pages:   11
   Dates:   2026-08-09

Abstract:

   To enable the headend node to do performance-aware path selection,
   this document proposes an extension to the BGP SR Policy protocol by
   defining a new optional Metric Sub-TLV within the BGP Tunnel
   Encapsulation Attribute.  The introduced Metric Sub-TLV encodes
   performance parameters (such as latency, bandwidth, reliability,
   etc.) for SR Policy paths.

   This specification also updates the BGP route selection procedures in
   RFC4271, modifying the Breaking Ties (Phase 2) logic to prioritize
   the metrics for SR Policy paths.

   Key contributions include:

   *  Introduce Metric Sub-TLV in BGP SR Policy

   *  Update the tie-breaking procedure for BGP route selection

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-li-idr-sr-policy-metric/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-li-idr-sr-policy-metric-04.html

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-li-idr-sr-policy-metric-04

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

I-D Action: draft-li-idr-sr-policy-metric-04.txt internet-drafts