Signaling Maximum SID Depth (MSD) Using IS-IS

Approval announcement
Draft of message to be sent after approval:

From: The IESG <>
To: IETF-Announce <>
Cc: The IESG <>,,,, Christian Hopps <>,,,
Subject: Protocol Action: 'Signaling MSD (Maximum SID Depth) using IS-IS' to Proposed Standard (draft-ietf-isis-segment-routing-msd-18.txt)

The IESG has approved the following document:
- 'Signaling MSD (Maximum SID Depth) using IS-IS'
  (draft-ietf-isis-segment-routing-msd-18.txt) as Proposed Standard

This document is the product of the Link State Routing Working Group.

The IESG contact persons are Alvaro Retana, Martin Vigoureux and Deborah

A URL of this Internet Draft is:

Technical Summary

   This document defines a way for an Intermediate System to
   Intermediate System (IS-IS) Router to advertise multiple types of
   supported Maximum SID Depths (MSDs) at node and/or link granularity.
   Such advertisements allow entities (e.g., centralized controllers) to
   determine whether a particular SID stack can be supported in a given

Working Group Summary

   Nothing to highlight; normal process.

Document Quality

  This document has been a WG document for over a year (and has existed for
  over 2 yars) and has been regularly revised and well reviewed.


   Shepherd: Christian Hopps
   AD: Alvaro Retana

  Designated Experts for the new "IGP MSD Types" registry are: Uma Chunduri ( and Jeff Tantsura (