Re: comments on draft-larsson-v6ops-mip-scenarios-00.txt

[Henrik Levkowetz <henrik@levkowetz.com>]

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!

	Henrik