From: OPSAWG <[email protected]> on behalf of Tianran Zhou 
<[email protected]>
Sent: 24 March 2021 06:23

Hi WG,

As discussed in the IETF110 meeting, we start a two weeks adoption call on 
draft-tgraf-ipfix-mpls-sr-label-type-07:
https://datatracker.ietf.org/doc/draft-tgraf-ipfix-mpls-sr-label-type/


Please respond with your comments and thoughts on this draft.

<tp>
I struggle to make sense of the IANA Considerations.

Usual practice is to start
'IANA is requested to .. '
which is
a) polite
b) easily changed to 'IANA has ...' when they have.

There are two separate actions, or perhaps not.  Usual practice is to have 
separate sections, one might be

3.1 IANA is requested to allocate four code points in the existing sub-registry 
"IPFIX MPLS label type (Value 46)" of the "IPFIX Information Elements" registry 
for IS-IS, OSPFv2, OSPFv3 and BGP Prefix-SID Segment Routing extension 

3.2 IANA is requested to add one new "IPFIX Information Element"
   with a new sub-registry in the "IP Flow Information Export (IPFIX)
   Entities" name space.
and if 3.2 makes no sense to you it may be because the I-D makes no sense to 
me!.  Perhaps there is only one IANA Consideration.
This I think needs to be fixed before adoption.

Separately, 
2.  MPLS Segment Routing Top Label Type
is all about justification and motivation which I think that the heading should 
reflect.

' Adding an additional layer into
   the MPLS data plane to above described use case.'
is unclear to me

 ...'we get insight'  ..
is not the impersonal style that an RFC usually is
Perhaps 
Introducing four new code points to information element
   mplsTopLabelType(46) for IS-IS, OSPFv2, OSPFv3 and BGP Prefix-SID,
   when Segment Routing with one of these four routing protocols is deployed, 
makes it possible to see what traffic is being forwarded, based on which MPLS 
control plane protocol

except that is not quite right.  These four are not 'MPLS control plane 
protocol' in the accepted sense of the phrase.

Perhaps -2 

Introducing four new code points to information element
   mplsTopLabelType(46) for IS-IS, OSPFv2, OSPFv3 and BGP Prefix-SID,
   when Segment Routing with one of these four routing protocols is deployed, 
makes it possible to see what traffic is being forwarded by one of these four 
protocols'

HTH

Tom Petch

We will conclude on April 7, 2021.

Thanks,
Tianran as co-chair

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