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Re: [ANCP] Comments on draft-ietf-ancp-framework-05.txt

>
> I am happy to leave the choice of the actual mechanism to the protocol
> design team (ie timeout or something else). But as far as the
> requirements document is concerned, it seems useful to point out that
> ANCP needs to support a mechanism to "release resources" when those  
> are
> no longer used by any flow of the pre-admitted set. Can we try  
> include a
> requirement to that effect and that leaves the actual mechanism to the
> protocol design team?
> Maybe something like:
> "   o  after receiving ANCP messages from the NAS containing
> admission control information for a set of multicast flows, the AN
> should support using ANCP to notify the NAS when the admission for  
> this
> multicast flows set in no longer needed (e.g. there is no longer any
> multicast flows from that set joined). This allows corresponding
> bandwidth to be released on NAS."
>
> <Sven> Sounds like a good way forward. How about rewording your  
> proposal
> to the following:
>
> "   o  The AN should support using ANCP to notify the NAS when  
> resources
> for a multicast flow are no longer in use (e.g. the AN is no longer
> replicating any multicast flows from a set of multicast flows sharing
> the same admission control rules). This allows corresponding bandwidth
> to be released on NAS."
>

I think we need to make it clear upfront that we are talking about  
"resources for a set of multicast flow" and not "resources for a  
multicast flow".
How about:

    o  after receiving ANCP messages from the NAS containing
admission control information for a set of multicast flows, the AN
should support using ANCP to notify the NAS when those resources
are no longer in use (e.g. the AN is no longer replicating any
multicast flows from that that set). This allows corresponding
bandwidth to be released on NAS."

Francois
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