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Re: comments on draft-larsson-v6ops-mip-scenarios-00.txt
on 2004-11-19 6:08 pm Pete McCann said the following:
> Henrik Levkowetz writes:
> > on 2004-11-19 5:34 pm Soliman, Hesham said the following:
> > > > > => In both of our drafts (DSMIPv4 and DSMIPv6) we use dynamic
> > > > > address assignment for both v4 and v6. The main reason for allowing
> > > > > this is local mobility management using MIP. I don't really agree
> > > > > with Pekka's original comment about the difficulty of doing this.
> > > > > This dynamic address assignment mechanism is implemented and _used_
> > > > > today in MIPv4. It is also documented in HMIPv6 and there is no
> > > > > reason why we can't use it in DSMIP.
> > > >
> > > > Hmm - that you use dynamic address assignment indicates to me that
> > > > you don't expect the IP address to be usable as an end node
> > > > identifier; you don't expect people to be able to reach the mobile
> > > > nodes by DNS. (Maybe a pity?)
> > >
> > > => Maybe not ;) It really depends on what you're doing.
> > > First of all, using the DNS for reachability is a long and
> > > possibly separate discussion. But regardless of outcome of that
> > > discussion I think we can agree that if the address is
> > > assigned by a local agent in the visited network (local
> > > HA or MAP) then you don't use it for reachability per se
> > > (i.e. DNS). These addresses are assigned dynamically and
> > > are basically used for LMM.
> > In that case, sure. Then dynamic address assignment makes
> > sense; you're only using a certain subset of the functionality
> > provided by MIP which doesn't require the global reachability
> > it otherwise provides.
> 3GPP2 has defined behavior that updates the DNS record associated with
> a particular NAI upon dynamic assignment of the home address. This
> can be triggered from the HA or the home AAA server.
Ah! :-) The things one learns!