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Intermediate System to Intermediate System (IS-IS) Extensions for Maximally Redundant Trees (MRT)

Document Type Expired Internet-Draft (isis WG)
Expired & archived
Authors Zhenbin Li , Nan Wu , Quintin Zhao , Alia Atlas , Chris Bowers , Jeff Tantsura
Last updated 2018-01-01 (Latest revision 2017-06-30)
Replaces draft-li-isis-mrt
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document describes extensions to IS-IS to support the distributed computation of Maximally Redundant Trees (MRT). Example uses of MRT include IP/LDP Fast-Reroute and global protection or live-live for multicast traffic. The extensions indicate what MRT profile(s) each router supports. Different MRT profiles can be defined to support different uses and to allow transition of capabilities. An extension is introduced to flood MRT-Ineligible links, due to administrative policy. This document also defines the Controlled Convergence sub-TLV, which is useful for MRT FRR as well as other applications.


Zhenbin Li
Nan Wu
Quintin Zhao
Alia Atlas
Chris Bowers
Jeff Tantsura

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