Coordinated Multicast Trees (CMT) for TRILL

The information below is for an old version of the document
Document Type Expired Internet-Draft (trill WG)
Authors Tissa Senevirathne  , Janardhanan Pathangi  , Jon Hudson 
Last updated 2013-05-12 (latest revision 2012-11-08)
Replaces draft-tissa-trill-cmt
Stream Internet Engineering Task Force (IETF)
Expired & archived
pdf htmlized bibtex
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Stream WG state WG Document
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


TRILL facilitates loop free connectivity to non-TRILL legacy networks via choice of an Appointed Forwarder for a set of VLANs. Appointed Forwarder provides VLAN level load sharing with active- standby model. Mission critical operations such as High Performance Data Centers require active-active load sharing model. Active-Active load sharing model can be accomplished by representing any given non-TRILL legacy network with a single virtual RBridge. Virtual representation of the non-TRILL legacy network with a single RBridge poses serious challenges in multi-destination RPF calculations. This document presents the required enhancements to build Coordinated Multicast Trees (CMT) within the TRILL campus to solve related RPF issues. CMT provides flexibility to RBridges to select desired path of association to a given distribution tree.


Tissa Senevirathne (
Janardhanan Pathangi (
Jon Hudson (

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