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Signaling Maximum SID Depth using Border Gateway Protocol Link-State

Document Type Replaced Internet-Draft (idr WG)
Authors Jeff Tantsura , Uma Chunduri , Greg Mirsky , Siva Sivabalan
Last updated 2017-07-15 (Latest revision 2017-06-04)
Replaced by RFC 8814
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-idr-bgp-ls-segment-routing-msd
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at:


This document proposes a way to signal Maximum SID Depth (MSD) supported by a node at node and/or link granularity by a BGP-LS speaker. In a Segment Routing (SR) enabled network a centralized controller that programs SR tunnels needs to know the MSD supported by the head-end at node and/or link granularity to push the SID stack of an appropriate depth. MSD is relevant to the head-end of a SR tunnel or Binding-SID anchor node where Binding-SID expansions might result in creation of a new SID stack.


Jeff Tantsura
Uma Chunduri
Greg Mirsky
Siva Sivabalan

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)