RE: Source address selection insufficient?

[Erik Nordmark <Erik.Nordmark@sun.com>]

> Note that this situation is not restricted to the case when two multihomed
> sites interact, but it is also possible when a non multihomed hosts
> initiates a communication with a multihomed host.
> For instance suppose a non multihomed host with address H1 and a host H2 in
> a multihomed site with addresses A:H2 and B:H2.
> Host H1 initiates a communication using as destination address A:H2 and
> source address H1
> Host H2 will reply using the same addresses so, source address A:H2 and
> destination address H1
> 
> Now if the multihomed site is using source address discovery and internal
> routing within the multihomed site has determined that the route to get to
> H1 is through IPSB, then the reply packet will not make it and a icmp packet
> will be sent back to H2 informing that it has to use prefix B in the source
> address. Clearly H2 cannot do that and the communication will fail

Yes, but in that case wouldn't the initiator retry with the other destination
address?

   Erik