Dan Wing allegedly wrote on 03 22 2009 10:09 AM:
>>> When one of these NATs goes down, active connections will be
>>> lost, but IGP routing will switch users automatically to a
>>> different NAT when they retry.
>> 
>> If you allow your hosts to use multiple connection points into the 
>> Internet, and external routing changes so that the packets they
>> send go out different connection points, their apparent source
>> address can change.  One of the requirements for effective use of
>> NAT and multihoming is that your hosts' peers need to handle this
>> (via Multipath, HIP, MIP, SCTP or whatever).  That is, you can't
>> allow your hosts to use multiple connection points until everyone
>> _else_ they talk to has been upgraded.  How will you know when that
>> is?
> 
> A host knows if it is using HIP, MIP, or SCTP to communicate with 
> another host.  

I was asking how the site knows when its hosts peers have been upgraded,
so that it can allow their traffic to be routed out multiple interfaces.

> FYI, there is also a new idea for Mobile DTLS which
> provides similar address mobility, draft-barrett-mobile-dtls-00.txt.

Yes but that should be a different thread.

Scott
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