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This draft is a work item of the Transparent Interconnection of Lots of Links Working Group of the IETF.
Title : Transparent Interconnection of Lots of Links (TRILL): Problem and Applicability Statement
Author(s) : J. Touch, R. Perlman
Filename : draft-ietf-trill-prob-01.txt
Pages : 16
Date : 2006-10-23
Current Ethernet (802.1) link layers use custom routing protocols
that have a number of challenges. The routing protocols need to
strictly avoid loops, even temporary loops during route propagation,
because of the lack of header loop detection support. Routing tends
not to take full advantage of alternate paths, or even non-
overlapping pairwise paths (in the case of spanning trees). The
convergence of these routing protocols and stability under link
changes and failures is also of concern. This document addresses
these concerns and suggests that they are related to the need to be
able to apply modern network layer routing protocols at the link
layer. This document assumes that solutions would not address issues
of scalability beyond that of existing bridged (802.1D) links, but
that a solution would be backward compatible with 802.1D, including
hubs, bridges, and their existing plug-and-play capabilities.
This document is a work in progress; we invite you to participate on
the mailing list at http://www.postel.org/rbridge
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