A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Considerations in Validating the Path in Routing Protocols
Author(s) : R. White
Filename : draft-white-pathconsiderations-00.txt
Pages : 9
Date : 2004-2-2
A good deal of consideration has gone into, and is currently being
given to, validating the path to a destination advertised by an
adjacent router or peer, such as [S-BGP], [SOBGP], and [IRV]. Since
much of this effort has been focused on BGP, this draft discusses
some issues with this work in terms of BGP.
The theory advanced by this draft is that the AS Path of a received
advertisement can only be validated, or proven 'correct', in one
respect: that the advertiser has at least one known path to the
destination advertised. A participant in a path vector routing
protocol cannot verify (1) whether the path a packet takes to its
destination corresponds to the path advertised by the routing
protocol, or (2) whether the chosen path is in accordance with the
policies of other ASes.
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