RE: The state of IPv6 multihoming development

["Hesham Soliman (EAB)" <hesham.soliman@era.ericsson.se>]

  > >   > Also note that
  > >   > current mobility will not support multihoming in any way,
  > >   > it would just
  > >   > be a starting point and we can borrow the header.
  > 
  > > => Current MIPv6 mechanisms _will_ support a multihomed/
  > > multiaddressed hosts. However, they will not give you a
  > > seamless switch from one path to another when one of the
  > > paths fail.
  > 
  > So what's the use then? We don't multihome because we like 
  > having many
  > addresses, but to survive failures.

=> That's why I asked: "How much interruption is acceptable?"
What do you mean by survive failure? Is it ok to lose 150 ms
of traffic? Or are you asking for a seamless survival failures
(i.e. zero interruption). Frankly I don't think that a 100 - 200 ms
interruption is a big deal, considering that this failure is not 
something that will happen once a minute.


  > 
  > > The host will somehow need to be explicitly
  > > notified that it should choose a new CoA. So this will
  > > interrupt (but need not break) ongoing connections.
  > 
  > How does a mobile host survive the home agent becoming unreachable?

=> I'm confused. Why would a home Agent become unreachable??
You seem to assume that the HA must be located in the 
upstream provider's network (that's the only interpretation
I can think of for your statement above). The HA can be located
in the mutlihomed enterprise. 


Hesham



  >