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Re: Shim6 proxies

Scott Leibrand wrote:
...

If you don't have source address rewriting, and we assume that ingress
filters are in place (which seems the by default assumption) then the
source address selection actually determines the exit path form the
multihomed site.



Not in today's networks.  Currently routers route on destination address,
not source address, so the destination address selection determines which
route is used to route the packets, which in turn determines which source
address you have to use if you want your packets to get out.


Actually, the sending host could theoretically use a different default gateway
for each different source address. That could be used as a back door method
for choice of exit router, without needing to touch router behaviour.

btw, draft-huitema-shim6-ingress-filtering-00 talks about this problem.

   Brian