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Coordinated Multicast Trees (CMT)for TRILL

Document type: Replaced Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2012-04-19 (latest revision 2012-04-13)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

Stream State:No stream defined
Document shepherd: No shepherd assigned

IESG State: Replaced by draft-ietf-trill-cmt
Responsible AD: (None)
Send notices to: No addresses provided

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


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)