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) : D. Eastlake 3rd, D. Dutt, S. Gai, A. Ghanwani, R. Perlman
Filename : draft-ietf-trill-rbridge-protocol-15.txt
Pages : 113
Date : 2010-1-22
RBridges provide optimal pair-wise forwarding without 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 unicast forwarding tables at transit RBridges
to be sized according to the number of RBridges (rather than the
number of end nodes), which allows their forwarding tables to be
substantially smaller than in conventional customer bridges.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-trill-rbridge-protocol-15.txt
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