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Re: [Lsr] LSR Working Group Adoption Poll for Flex Algorithm Drafts

"Dongjie (Jimmy)" <jie.dong@huawei.com> Thu, 19 April 2018 07:11 UTC

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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>
Thread-Topic: [Lsr] LSR Working Group Adoption Poll for Flex Algorithm Drafts
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Date: Thu, 19 Apr 2018 07:10:53 +0000
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Subject: Re: [Lsr] LSR Working Group Adoption Poll for Flex Algorithm Drafts
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Hi,

Here are some comments on the Flex Algo drafts.

SR algorithm as defined in draft-ietf-isis-segment-routing-extensions is about the algorithm used for path calculation, such as SPF, strict SPF, etc.

In the Flex Algo drafts, the definition of algorithm is extended to include topological constraints and the metric type used in calculation, which makes its functionality analogous to multi-topology routing (MTR).

Section 4.1 of the Flex Algo drafts says "Flex-Algorithm definition is topology independent", while in some places Flex Algo is described as a "light weight alternative" to MTR.

It would be necessary if the relationship between Flex-Algo and MTR can be further clarified. Whether the two mechanisms are complementary to each other, or Flex-Algo will be used to replace MTR?

And if it is claimed that Flex-Algo is light weight than MTR, it would be helpful to give a thorough comparison of the two mechanisms somewhere.

Best regards,
Jie

From: Lsr [mailto:lsr-bounces@ietf.org] On Behalf Of Acee Lindem (acee)
Sent: Tuesday, April 17, 2018 10:44 PM
To: lsr@ietf.org
Subject: [Lsr] LSR Working Group Adoption Poll for Flex Algorithm Drafts

This begins a two-week adoption poll for the following Flex Algorithm drafts:

https://datatracker.ietf.org/doc/draft-hegdeppsenak-isis-sr-flex-algo/
https://datatracker.ietf.org/doc/draft-ppsenak-ospf-sr-flex-algo/

The adoption poll will end at 12:00 AM EST on May 2nd, 2018. Please indicate your support of opposition of the drafts.

Additionally, the authors are amenable to combining the drafts into a single draft. If you have an opinion, please state that as well.

Thanks,
Acee

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