Re: [netlmm] timestamp vs seqno redux

Ahmad Muhanna wrote:
[...]
>>> But, if the LMA falls back to the seq number based approach and 
>>> if there are no context transfers, there is always an extra round
>>>  trip for each MN registration (at handoff).
>> No, not always an extra round trip necessary.  (For our audience: 
>> in private I've discussed with Ahmad and Sri at least three 
>> possible ways to sync these seqnos and two of them assumed extra 
>> round trips.)
> 
> {Ahmad] Alex, the fact that we did not continue the offline 
> discussion is because you preferred to bring this to the mailing list
>  which is absolutely fine with me. It does not mean that I agreed
> with any of your proposals.

Right, I know, you didn't agree, and I didn't imply you agreed.  I agree
with you on this.

> You keep saying that the SQN can be provided by the LMA via a 
> profile. I want you to be specific here, tell me how that would work.
>  In details.
> 
> My understudying that profile comes from a policy server or whatever.
>  The SQN is a per-MN dynamically always changing. In your response 
> please consider how the LMA will always update the profile with the 
> last SQN.

Ahmad, when first the 'profile' is delivered by the 'policy server' or
whatever to the MAG then the LMA inserts the current seqno in that
profile.  It is not necessary to insert every time, just the first time
the MN authenticates.  This is the same  time when the home prefix (the
one that has to be put in the RA) is delivered in that same profile.

Don't you think this can work?  Why not?  Why can the LMA send to MAG
the home network prefix of the MN but not its current seqno?

Alex

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