On Sun, 15 Jul 2001 jlewis@lewis.org wrote:
In most cases you don't. What pushed the client I'm thinking of to multihome though was the C&W/PSI peering issue and the threat of similar issues in the future. They only had connectivity to C&W and needed to reach networks only on PSI. Multiple BGP peers and full routes would have worked for them in this case. Customer routes and multiple defaults would likely not have worked.
True. Of course there are multiple ways to take customer routes, one of which is filtering. A unique situation such as the CW/PSI mess would have called for a prefix filter tweak, which, albeit, not automatic, relatively painless on a small scale (i.e, you don't have to change hundreds of customer routers because they don't have the talent themselves). andy