Coordinated Multicast Trees (CMT) for Transparent Interconnection of Lots of Links (TRILL) (RFC7783)
Original Publication Date: 2016-Feb-01
Included in the Prior Art Database: 2016-Feb-26
Internet Society Requests For Comment (RFCs)
T. Senevirathne: AUTHOR [+2]
TRILL (Transparent Interconnection of Lots of Links), as presented in [RFC6325] and other related documents, provides methods of utilizing all available paths for active forwarding, with minimum configuration. TRILL utilizes IS-IS (Intermediate System to Intermediate System) [IS-IS] as its control plane and uses a TRILL Header that includes a Hop Count.
Internet Engineering Task Force (IETF) T. Senevirathne Request for Comments: 7783 Consultant Updates: 6325 J. Pathangi Category: Standards Track Dell ISSN: 2070-1721 J. Hudson Brocade February 2016
Coordinated Multicast Trees (CMT) for Transparent Interconnection of Lots of Links (TRILL)
TRILL (Transparent Interconnection of Lots of Links) facilitates
loop-free connectivity to non-TRILL networks via a choice of an
Appointed Forwarder for a set of VLANs. Appointed Forwarders provide
VLAN-based load sharing with an active-standby model. High-
performance applications require an active-active load-sharing model.
The active-active load-sharing model can be accomplished by
representing any given non-TRILL network with a single virtual
RBridge (also referred to as a virtual Routing Bridge or virtual
TRILL switch). 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 related RPF issues. CMT,
which only requires a software upgrade, provides flexibility to
RBridges in selecting a desired path of association to a given TRILL
multi-destination distribution tree. This document updates RFC 6325.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7783.
al. Standards Track [Page 1]
RFC 7783 Coordinated Multicast Trees for TRILL February 2016
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