The IESG has approved the following document: - 'Coordinated Multicast Trees (CMT) for TRILL' (draft-ietf-trill-cmt-11.txt) as Proposed Standard This document is the product of the Transparent Interconnection of Lots of Links Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-trill-cmt/ Technical Summary The TRILL base protocol facilitates loop free connectivity to non-TRILL networks via choice of an Appointed Forwarder for a set of VLANs. Appointed Forwarders provides load sharing based on VLAN with an active-standby model. High performance operations require an active-active load sharing model with rapid fail over and load spreading on a per flow basis. Active-Active load sharing can be accomplished by representing any given non-TRILL network with a single virtual RBridge. Virtual representation of the non-TRILL network with a single RBridge poses serious challenges in multi-destination RPF (Reverse Path Forwarding) check calculations. This document specifies required enhancements to build Coordinated Multicast Trees (CMT) within the TRILL campus to solve RPF related issues. Working Group Summary This draft was developed by the WG over a two year period. There has been relatively little controversy over the technical content of the draft. It has good WG support. Document Quality This document is of good quality. CMT is implemented in the Cisco Nexus product line. Personnel Document Shepherd: Donald Eastlake, 3rd Responsible Area Director: Alia Atlas
