Re: [OPSAWG] Feedback on draft-www-opsawg-yang-vpn-service-pm

[[e-mail]]

Hi Joe, all, 

Thank you for sharing these comments.

Instead of sharing avg values, we do think that sharing percentile values is more useful. Up to 3 sets of percentiles can be shared for each performance metric: low (e.g., 5.00), mid (50.00), or high (90.00). The exact percentile value to characterize low/mid/high is configurable. Otherwise, default values will be used (will update the module + explain the behavior in the text).    

If all *-percentile parameters are set to 0.00, this means that no percentile-related nodes will be reported for a given performance metric (one-way delay, one-way delay variation). Only peak/min/current values can be reported.

Fully agree with your comment on the counters.

More text will be added to describe the intended behavior. 

Cheers,
Med

> -----Message d'origine-----
> De : OPSAWG [mailto:[e-mail]] De la part de Joe
> Clarke (jclarke)
> Envoyé : vendredi 11 décembre 2020 21:28
> À : opsawg <[e-mail]>
> Objet : [OPSAWG] Feedback on draft-www-opsawg-yang-vpn-service-pm
> 
> During the IETF109 opsawg session, this draft was presented, and I
> was concerned that a lot of its work had happened amongst the
> authors of the L2NM/L3NM et al work.  I hadn’t seen a lot of
> discussion on this list.
> 
> I wanted to kick off some discussion around it.
> 
> As contributor:
> 
> I think this work is useful and complements the VPN NM work nicely.
> I had a few questions/comments as I read the -02 version of this
> draft.  First, the percentile leafs use the word “percentile” to
> define what it is.  I think some more wording around what is meant
> by the low/middle/high percentiles would be useful.  One can piece
> this together by reading through the YANG module, but I would like
> to see some explanatory text in the body of the document that
> explains the percentile breakdowns.  Examples of this would also be
> helpful.
> 
> What would happen if you set all percentile leafs to 0.00?  Would
> that only affect the delay and jitter leafs?  Again, I think some
> clarifying text is needed here as to how to use these data points.
> 
> I’m also curious about some of the tp-telemetry-attributes counters.
> Why are the octets, unicast, and nunicast counters 32-bit?  I think
> they should be 64-bit to be in line with ietf-interfaces.  And for
> all of these leafs, why are they uint instead of counter?  They seem
> to be counters in reading the descriptions.  The same counter
> questions applies to those -count leafs under loss-statistics.
> 
> Joe
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