A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Transparent Interconnection of Lots of Links Working Group of the IETF.
Title : Rbridges: Base Protocol Specification
Author(s) : R. Perlman
Filename : draft-ietf-trill-rbridge-protocol-08.txt
Pages : 79
Date : 2008-7-15
RBridges provide optimal pair-wise forwarding with zero
configuration, safe forwarding even during periods of temporary
loops, and support for multipathing of both unicast and multicast
traffic. They achieve these goals using IS-IS routing and
encapsulation of traffic with a header that includes a hop count.
RBridges are compatible with previous IEEE 802.1 customer bridges as
well as IPv4 and IPv6 routers and end nodes. They are as invisible to
current IP routers as bridges are and, like routers, they terminate
the bridge spanning tree protocol.
The design supports VLANs and optimization of the distribution of
multi-destination frames based on VLAN and IP derived multicast
groups. It also allows forwarding tables to be based on RBridge
destinations (rather than end node destinations), which allows
internal forwarding tables to be substantially smaller than in
conventional bridge systems.
A URL for this Internet-Draft is:
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