Coordinated Multicast Trees (CMT)for TRILL

Document Type Replaced Internet-Draft (individual)
Authors Tissa Senevirathne  , Janardhanan Pathangi  , Jon Hudson 
Last updated 2012-04-19 (latest revision 2012-04-13)
Replaced by RFC 7783
Stream (None)
Intended RFC status (None)
Expired & archived
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IESG IESG state Replaced by draft-ietf-trill-cmt
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This Internet-Draft is no longer active.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 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.)