itojun,
To be more precise, is that what you mean:
The box maintains a cache of currently active flow IDs.
For each arriving packet, it looks to see if the flow ID on that
packet is in the cache.
If no ==> extract the 5-tuple, cache the flow ID and the 5-tuple,
then apply corresponding RSVP or diffserv action.
If yes ==> extract the 5-tuple from the cache,
then apply corresponding RSVP or diffserv action.
The problem is that for encrypted packets, the first step is impossible.
Brian
[EMAIL PROTECTED] wrote:
>
> >>Only if we define a standard way of compressing the ports and protocol type
> >>into the flow label.
> > i don't think there needs to be a standard way. if there's some
> > pseudorandom and unique number in flow label field (as suggested in
> > RFC2460) it is more than enough.
>
> oops, what I meant here was:
> - router/RSVP device looks at full 5-tuple, on the first packet it sees,
> and remember flow label value
> (need to chase extension headers)
> - for subsequent packets router/RSVP device will classify packets
> based on flow label value
> there's no need for compression rule from 5-tuple to flow label
> (some other protocol may use something other than 5-tuple!)
>
> I admit that ESP case is tricky.
>
> itojun
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