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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, et al.
Filename : draft-ietf-trill-rbridge-protocol-05.txt
Pages : 71
Date : 2007-7-10
RBridges allow for optimal pair-wise forwarding with zero
configuration, safe forwarding even during periods of temporary
loops, and multipathing for 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 bridges as well as
current 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, optionally, 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.
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