RE: IETF multihoming powder: just add IPv6 and stir

["Tony Li" <Tony.Li@procket.com>]

|    >> 1) Rewriting addresses in the site exit routers 
|    deprives smart hosts
|    >> from the capacity to select their preferred return path;
|    
|    > To be sure I understand, you are saying that my laptop 
|    should have the 
|    > ability to make a decision as to what ISP Microsoft uses 
|    to route 
|    > packets back to me?
|    
|    Just because that's the way it's done today doesn't mean it has to 
|    continue to be done like that in the future. 


If you follow this argument a bit further, the number of possible
paths internal to the core explodes.  There is no way to completely
specify the path of a packet without a connection oriented setup
protocol.  Further, unless one wants to sever the loose coupling
between the routing subsystem and the host, it's not going to be
possible to specify even a partial path.  

Frankly, there's no way to reasonably support a host path selection
feature in the Internet architecture.

Tony