Re: Transport level multihoming

[Jim Bound <seamus@bit-net.com>]

Hi Peter,

> One question.
> 
> In a transport level multihoming scenario, should two addresses that differ in
> the lower 64 bits (node address part) be considered independent nodes and
> handled in the traditional manner with regard to multiple addresses?

Good question.  I would say yes but SCTP would permit one to treat them as
the same node yet different links (interfaces).  But I think we need to
think hard about the question and all the matrix of answers.

> 
> Why I ask is that the upper 64 bits of all possible full addresses for a
> particular node that is multihomed have particular properties that would be
> useful to exploit in transport level multihoming.  If the lower 64 bits is not
> identical between multiple addresses, it could lead to inefficiencies in a
> compressed representation of the list of IPv6 addresses.  It may also be
> important to some layers of any multihoming protocol to consider that addresses
> which differ in the lower 64 bits would not being equivalent for the purposes
> of multihoming. 

Hmmmm... I am not sure we can assume this on the lower 64 bits...I need to
dream on that...Excellent question.

/jim