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Re: [spring] 6MAN WGLC: draft-ietf-6man-sids

Dhruv Dhody <dhruv.ietf@gmail.com> Sat, 08 October 2022 05:00 UTC

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From: Dhruv Dhody <dhruv.ietf@gmail.com>
Date: Sat, 08 Oct 2022 10:29:42 +0530
Message-ID: <CAB75xn7_x073NT1uSxP9j_GVmU71hjCqOpMJJO-dZ0hxYMF0ww@mail.gmail.com>
To: Suresh Krishnan <suresh.krishnan@gmail.com>
Cc: Joel Halpern <jmh@joelhalpern.com>, 6man <ipv6@ietf.org>, SPRING WG List <spring@ietf.org>
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Subject: Re: [spring] 6MAN WGLC: draft-ietf-6man-sids
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Thanks Suresh and Joel, the text looks good! Thanks for taking the comment
into consideration!

Dhruv

On Sat, Oct 8, 2022 at 6:46 AM Suresh Krishnan <suresh.krishnan@gmail.com>
wrote:

> Hi Joel,
>
> On Oct 7, 2022, at 9:07 PM, Joel Halpern <jmh@joelhalpern.com> wrote:
>
> Almost, but not quite.  The first part, up to "egress points" is fine.
> But the description of the reasons leaves out one case I think is
> important.  Namely, preventing packets from outside the SR Domain (e.g.
> from an outside attacker) entering the SRv6 Domain.)
>
>
> Ah. Got it. This is covered in more detail in RFC8754 Section 5.1 but it
> makes sense to at least point to it here. Take 2:
>
> NEW:
> In case the deployments do not use this allocated prefix additional care
> needs to be exercised at network ingress and egress points so that SRv6
> packets do not leak out of SR domains and they do not accidentally enter SR
> unaware domains. Similarly as stated in Section 5.1 of RFC8754 packets
> entering an SR domain from the outside need to be configured to filter out
> the selected prefix if it is different from the prefix allocated here.
>
> Thoughts?
>
> Regards
> Suresh
>
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