I think rerouting inside the path between multi-homed source user A and multi-homed destination user B ought to be possible at which ever point prior getting to B. It may be at A and at any router in the path. It should not involve B nor the application being run at B. And it should not involve the application at A either. Rerouting may either be done such that the packets are still forwarded towards the same destination location, or, if this becomes necessary/advantageous (e.g. for reasons of traffic balancing), that the destination location is changed- e.g somewhere in the middle of the path or at/by the egress router in the first place. Is this a wanted objective ? If so, any architecture, including TARA, needs to do something about it. E.g. a natural approach is to convey an armed destination location as well the potential alternatives while a packet is transmitted. Right ? Heiner
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