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Re: [spring] Chair Review of draft-ietf-spring-srv6-srh-compression-11

Tom Herbert <tom@herbertland.com> Mon, 25 March 2024 16:58 UTC

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From: Tom Herbert <tom@herbertland.com>
Date: Mon, 25 Mar 2024 09:57:47 -0700
Message-ID: <CALx6S35FDPDMinDYxTL9Bj8bmjzx5q-JGWMTJObCn=uyVVfrZA@mail.gmail.com>
To: Robert Raszuk <robert@raszuk.net>
Cc: Andrew Alston - IETF <andrew-ietf@liquid.tech>, Ron Bonica <rbonica@juniper.net>, "spring@ietf.org" <spring@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/298ZQUjHusSUJtUzv8gSNwbo61k>
Subject: Re: [spring] Chair Review of draft-ietf-spring-srv6-srh-compression-11
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On Mon, Mar 25, 2024 at 9:40 AM Robert Raszuk <robert@raszuk.net> wrote:
>
>
> Actually looking at this from the perspective where SRH may be omitted I see in the subject draft this clearly stated:
>
> A source node steers a packet into an SR Policy. If the SR Policy results in a Segment List containing a single segment, and there is no need to add information to the SRH flag or add TLV; the DA is set to the single Segment List entry, and the SRH MAY be omitted.¶
>
>
> That to me indicated that host computed checksum will be correct all along the transit nodes. So no issue either here.
>
> Could someone illustrate with a drawing of packet's traversing the network their assumed header format and forseen issues ?

Robert,

Are there any cases in segment routing where the Destination Address
is changed in flight and a routing header is not present in the
packet?

Tom

>
> Thx,
> R,
>

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