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TRILL: Resilient Distribution Trees

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Mingui Zhang , Tissa Senevirathne , Janardhanan Pathangi , Ayan Banerjee , Anoop Ghanwani
Last updated 2018-07-26 (Latest revision 2018-01-22)
Replaces draft-zhang-trill-resilient-trees
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Stream WG state Submitted to IESG for Publication
Document shepherd Donald E. Eastlake 3rd
Shepherd write-up Show Last changed 2017-10-18
IESG IESG state Expired (IESG: Dead)
Action Holders
Consensus boilerplate Yes
Telechat date (None)
Responsible AD Alia Atlas
Send notices to (None)

This Internet-Draft is no longer active.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


The TRILL (Transparent Interconnection of Lots of Links) protocol provides multicast data forwarding based on IS-IS link state routing. Distribution trees are computed based on the link state information through Shortest Path First calculation. When a link on the distribution tree fails, a campus-wide re-convergence of this distribution tree will take place, which can be time consuming and may cause considerable disruption to the ongoing multicast service. This document specifies how to build backup distribution trees to protect links on the primary distribution tree. Since the backup distribution tree is built up ahead of the link failure, when a link on the primary distribution tree fails, the pre-installed backup forwarding table will be utilized to deliver multicast packets without waiting for the campus-wide re-convergence. This minimizes the service disruption. This document updates RFC 6325.


Mingui Zhang
Tissa Senevirathne
Janardhanan Pathangi
Ayan Banerjee
Anoop Ghanwani

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