From: Pce <[email protected]> on behalf of Samuel Sidor (ssidor) 
<[email protected]>
Sent: 10 January 2024 10:18

Hi PCE WG,

I would like to ask for WG LC for draft-ietf-pce-sid-algo on behalf of authors. 
Are there any remaining issues/comments/questions which I (or co-authors) 
missed and which are not handled yet?

URL: https://datatracker.ietf.org/doc/draft-ietf-pce-sid-algo/

<tp>
Well new to the PCE list may be I fear but I have a basic problem about 
'algorithm'.

You reference RFC8665 and RFC 8667.  In those it is always SR-Algorithm so I 
think that that should be the spelling here.

More fundamentally,  8665 sets up an IANA registry with two values, 0 and 1, 
which tells me that 8665 is out of date as soon as it is published and that all 
references should be  to IANA and not the RFC.  The update policy is Standards 
Action.  ADs regard additions to IANA registries as not updating the RFC 
creating the registry so reading 8665 will not tell you that it is out of date 
unless you read between the lines of the IANA Considerations and go see what is 
current.

It gets more problematic.  The IANA registry was updated by RFC9350 which keeps 
the same update criteria  but splits the range into two 0-127 and 128-255, the 
latter being flexible.

s.4.2.1 talks of Flexible Algorithm with a Normative reference to RFC9350 which 
begs the question as to the relationship between SR Algorithm and Flexible 
Algorithm when used in this document. Either/or, Synonyms?

Here and  now it may all be obvious but in years to come with multiple 
algorithms in use it will likely be unclear what you are referencing in s.3.2, 
s.3.3, s.3.4; is it the range 0-127 or 0-255 or 128-255 or...?

Tom Petch



Thanks a lot,
Samuel

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