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Re: multi6-functional-dec and re-homing
El 19/01/2005, a las 13:04, <firstname.lastname@example.org> escribió:
well, i am not sure about this...
My point was about establishing new communication after an outage with
external hosts that don't implement the shim.
This is important becuase at least in the early days, most of nodes
won't implement shim.
Explicitly taking this point into consideration would allow to provide
some degree of fault tolerance (i.e. the capability of establishing
communications after an outage) even in communications with nodes that
don't implement the shim.
This is a general transition issue; I guess the protocol should
an shim6 endpoint works with a non-shim6 endpoint.
I don't know...
I mean, on one hand, you are right, the shim protocol must specify how
to deal with non-shim hosts. this means essentially the capability
detection functions of the functional dec draft.
However, there is more that can be done in this context i suppose. I
mean there are some fault tolerance capabilities that can be provided
even though the communication is established with a non shim host. In
particular, it is possible to establish new communications after an
outage if the host withn the multihomed site is able to smartly select
the source address to be used for that communication. In order to do
this, the multihomed host needs modifications in the source address
Such mechanism could also be used when establishing communications with
a shim node, but perhaps in this scenario superior solutions can be
obtained since both nodes implement the mechanism.
So, i guess that my point is that when a non shim node is involved in a
communication, it would be good if we did more that just detecting
that the shim is not supported, but we could deploy mechanisms to
provide enhanced fault tolerance in this scenario.
(It could also be noted that such mechanism is likely to be much
simpler than the whole shim and that it will, by itself, provide some
degree of fault tolerance, so it may make sense to deploy it even
without the shim)