Re: [IPFIX] WG Last Call for draft-ietf-ipfix-information-model-rfc5102bis-05.txt

[Paul Aitken <[e-mail]>]

Brian,

> What verb does the MP apply to a unit of information when it gives it to the EP?
>
> A delta counter counts only observations made since the last Flow Record for a given Flow was measured.
>
> Or maybe we can sidestep the action completely:
>
> A delta counter counts only observations made since the previous Flow Record for a given Flow.

No, that's still involving export.

What should the MP do if the flow ends *but isn't exported* ? Just the 
same as when the flow *is* exported. So the definition of deltaCount is 
independent of export, flow records, etc.

So the definitions have to be about the metering time, and particularly 
that we've started metering again. However, we can't write that, because 
some implementations may not hold state that tells them this. So all we 
know is that totalCounters meter from the start of the MP, while delta 
counters meter a potentially shorter interval, reporting the value 
metered since the start of that interval.

P.