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Re: [spring] [EXTERNAL] Re: A technical concern regarding draft-schmutzer-spring-cs-sr-policy-00

Alexander Vainshtein <Alexander.Vainshtein@rbbn.com> Sun, 18 June 2023 07:33 UTC

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From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
To: Robert Raszuk <robert@raszuk.net>
CC: "Christian Schmutzer (cschmutz)" <cschmutz@cisco.com>, "spring@ietf.org" <spring@ietf.org>, "Dongjie (Jimmy)" <jie.dong@huawei.com>, Stewart Bryant <stewart.bryant@gmail.com>
Thread-Topic: [EXTERNAL] Re: [spring] A technical concern regarding draft-schmutzer-spring-cs-sr-policy-00
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Date: Sun, 18 Jun 2023 07:33:01 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/wY4Se0eb5iNNW7A6ejv31z1kmjQ>
Subject: Re: [spring] [EXTERNAL] Re: A technical concern regarding draft-schmutzer-spring-cs-sr-policy-00
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Robert.
I do not assume about 100% traffic in the given network is SR.

I only assume that the operator prevents any traffic paths from using SIDs that have been associated with the CS topology and its resources (e.g., steering all non-CS traffic across the default topology), be it intentionally or due to some transient condition (FRR, micro-loop avoidance etc.).

Regards,
Sasha

From: Robert Raszuk <robert@raszuk.net>
Sent: Thursday, June 15, 2023 6:43 PM
To: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
Cc: Christian Schmutzer (cschmutz) <cschmutz@cisco.com>; spring@ietf.org; Dongjie (Jimmy) <jie.dong@huawei.com>; Stewart Bryant <stewart.bryant@gmail.com>
Subject: Re: [EXTERNAL] Re: [spring] A technical concern regarding draft-schmutzer-spring-cs-sr-policy-00


Physical links would be shared, but “soft” resources (queues, buffers etc.) would not.

Well ingress or egress interface queue is a physical resource last time I checked.

Leave alone zero view of intra chassis fabric issues and drops.

Then last but not least you are making a huge assumption that in the given network 100% of traffic is SR ..

Good luck !
Robert

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