RE: multihoming issues via SCTP

["Christian Huitema" <huitema@windows.microsoft.com>]

> Please keep in mind that selection of the source address and of the
> source
> interface are not related. In TCP, the system will select the source
> address matching the output interface for the first packet of an
> outgoing
> session. Since the remote TCP expects this address to stay the same,
> subsequent packets within a session all have the same source address,
> regardless of the output interface.
> 
> Since it is possible in TCP to find a source address based on the
> output
> interface for the first packet, it stands to reason that SCTP could do
> this for every packet.

There are issues with this if the ISP enforces verification of the
source address. The issues are discussed in 
	draft-draves-ipngwg-ingress-filtering-00.txt
These issues should be addressed by any multihoming solution.

-- Christian Huitema