Re: [Lsr] Flex Algorithms Drafts

Uma Chunduri <umac.ietf@gmail.com> Wed, 02 May 2018 04:06 UTC

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From: Uma Chunduri <umac.ietf@gmail.com>
Date: Tue, 01 May 2018 21:06:36 -0700
Message-ID: <CAF18ct4ze19-mGWiEobcmiqD0KmLOqQAVBcDHHctRa4ooYpdOw@mail.gmail.com>
To: Peter Psenak <ppsenak@cisco.com>
Cc: Uma Chunduri <uma.chunduri@huawei.com>, "Acee Lindem (acee)" <acee@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>, "draft-hegdeppsenak-isis-sr-flex-algo@ietf.org" <draft-hegdeppsenak-isis-sr-flex-algo@ietf.org>
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Subject: Re: [Lsr] Flex Algorithms Drafts
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>
>
> these are being renamed in the next update to:
>
> Flex-Algorithm - Single octet value between 128 and 255 inclusive
>
>
> IGP Alg. Type - Single octet. Value between 0 and 127 inclusive, that
> identifies IGP algorithm type used to compute paths for the Flex-Algoritm.
> Values are defined in "IGP Algorithm Types" registry defined under
> "Interior Gateway Protocol (IGP) Parameters" IANA registries


Hi Peter,

The above change would conflict
https://www.iana.org/assignments/igp-parameters/igp-parameters.xhtml (where
it is defined till 255) and

cause changes to

https://tools.ietf.org/html/draft-ietf-ospf-segment-routing-extensions-25
(Which is  in RFC Editor queue)

https://datatracker.ietf.org/doc/draft-ietf-isis-segment-routing-extensions/
(In WG LC)


Are we going in that direction?

I still see "Flex-Algorithm" is light-weight sub-topology with constrains
and still computed using one of the Algorithms as specified in
https://www.iana.org/assignments/igp-parameters/igp-parameters.xhtml.

Kindly avoid confusion around the terminology here, plz -

Thx!

--
Uma C.