Ok - I guess you can add a registry now if you want. We don’t have any WG 
drafts adding flex-algo rules but we have draft-gong-lsr-flex-algo-exclude-node 
as an individual draft. I seem to recall discussion as to whether this draft is 
necessary since a node could be excluded by not participating in the flex-algo. 

Thanks,
Acee


> On Jan 28, 2025, at 13:58, Peter Psenak <[email protected]> wrote:
> 
> Hi Acee,
> 
> we require strict ordering - it may not be necessary now, but in the future 
> we may introduce something that will need it, so we started to enforce it 
> from day 1.
> 
> thanks,
> Peter
> 
> 
> On 28/01/2025 19:54, Acee Lindem wrote:
>> Speaking as WG member:
>> 
>> Hi Les, Peter, Shraddha,
>> 
>>> On Jan 24, 2025, at 10:34 AM, Les Ginsberg (ginsberg) <[email protected]> 
>>> wrote:
>>> 
>>> I have reviewed the draft and support moving ahead with publishing this as 
>>> an RFC.
>>> 
>>> The primary use case is well described in Section 3 of the draft. Note this 
>>> is NOT, as some folks have mistakenly inferred from the draft title,  aimed 
>>> at multicast RPF use cases.
>>> 
>>> As regards the evolving set of rules for flex-algo calculations, I think 
>>> the current model of adding an appendix with the full list of updated rules 
>>> is problematic.
>>> We now have three documents which define rules:
>>> 
>>> RFC 9350
>>> draft-ietf-lsr-flex-algo-bw-con
>>> draft-ietf-lsr-igp-flex-algo-reverse-affinity
>>> 
>>> Each document is accurate based on the rules defined at the time of 
>>> publication.
>>> But as each document is published - with potentially more on the way - it 
>>> becomes difficult to know which is the "latest".
>>> Readers of one document might not be aware of the other documents.
>>> 
>>> Perhaps the authors of the two drafts above could consider introducing an 
>>> IANA Registry which has the ordered list of rules (and appropriate 
>>> references for each) so that there is one source of truth.
>>> Each document would then simply specify the updates to the IANA registry.
>> I don't think we need this, since all the interface constraints need to be 
>> satisfied for an interface to used in a given flex algorithm, I don't see 
>> that the ordering of the rules is important.
>> 
>> Maybe the text in the two flex-algo drafts which are going to progress and 
>> be published shouldn't imply strict ordering.
>> 
>> Thanks,
>> Acee
>> 
>> 
>> 
>> 
>> 
>>>   Les
>>> 
>>>> -----Original Message-----
>>>> From: Acee Lindem <[email protected]>
>>>> Sent: Thursday, January 16, 2025 11:03 AM
>>>> To: lsr <[email protected]>
>>>> Cc: [email protected]
>>>> Subject: [Lsr] Working Group Last Call of "IGP Flexible Algorithms Reverse
>>>> Affinity Constraint" - draft-ietf-lsr-igp-flex-algo-reverse-affinity-03
>>>> 
>>>> LSR WG,
>>>> 
>>>> 
>>>> This email begins a 3 week WG Last Call for the following draft: "IGP 
>>>> Flexible
>>>> Algorithms Reverse Affinity Constraint" - 
>>>> draft-ietf-lsr-igp-flex-algo-reverse-
>>>> affinity-03"
>>>> 
>>>> Please review the document and indicate your support or objections by
>>>> February 7th, 2025. The extra week is to account for the Lunar New Year
>>>> holiday.
>>>> 
>>>> Thanks,
>>>> Acee
>>>> _______________________________________________
>>>> Lsr mailing list -- [email protected]
>>>> To unsubscribe send an email to [email protected]
>> 
> 

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