A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : RBridges: Transparent Routing
Author(s) : R. Perlman, et al.
Filename : draft-perlman-rbridge-02.txt
Pages : 21
Date : 2005-2-21
This design provides the ability to have an entire campus, with
multiple physical links, look to IP like a single subnet. This
allows zero configuration of the switches within the campus, and
addresses. This capability is often provided today with bridges.
Bridges do accomplish this goal. However, bridges have
disadvantages: routing is confined to a spanning tree (precluding
pair-wise shortest paths), the header on which the spanning tree
forwards has no hop count, spanning tree forwarding in the presence
of temporary loops spawns exponential copies of packets, nodes can
have only a single point of attachment, and the spanning tree, in
order to avoid temporary loops, is slow to start forwarding on new
ports. The design in this paper avoids these disadvantages of
bridges while maintaining the advantages. This design works for both
IPv4 and IPv6.
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