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Re: [netmod] Mirja Kühlewind's Discuss on draft-ietf-netmod-acl-model-19: (with DISCUSS)

Eliot Lear <lear@cisco.com> Tue, 25 September 2018 20:26 UTC

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To: Mahesh Jethanandani <mjethanandani@gmail.com>, "Mirja Kuehlewind (IETF)" <ietf@kuehlewind.net>
Cc: NetMod WG Chairs <netmod-chairs@ietf.org>, The IESG <iesg@ietf.org>, NetMod WG <netmod@ietf.org>, draft-ietf-netmod-acl-model@ietf.org
References: <153753763758.7269.9597830616255329217.idtracker@ietfa.amsl.com> <E957D368-88BA-442F-AB7F-F8464847C719@gmail.com> <53A51142-7568-473D-B309-E3A86459B5F9@kuehlewind.net> <8C4D59E2-0C6D-4570-B8B0-D27D6C74CA2C@gmail.com>
From: Eliot Lear <lear@cisco.com>
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Date: Tue, 25 Sep 2018 22:25:54 +0200
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Subject: Re: [netmod] Mirja Kühlewind's Discuss on draft-ietf-netmod-acl-model-19: (with DISCUSS)
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Just on this point:


On 25.09.18 20:35, Mahesh Jethanandani wrote:
>> That’s do bad. However, the document must at least say that it’s
>> scope is restricted to TCP and UDP only and it would also be nice to
>> reason why that restriction is and what would need to be done to
>> extend it in future.
>
> To the contrary. The model is *not* restricted to TCP and UDP. In
> Section 2, the document states that:
>
>    ACL implementations in every device may vary greatly in terms of the
>    filter constructs and actions that they support.  Therefore this
>    draft proposes a model that can be augmented by standard extensions
>    and vendor proprietary models.
>
>
> It is a different matter that it has chosen not to support SCTP and
> DCCP. That is because implementations today have not felt the market
> need to add support for those protocols. But that does not prevent
> anyone from adding support for them.
>
> As far as an example for how the model can be extended in the future,
> see Appendix A - Extending ACL model examples.

It's important to not try to boil the ocean, and this model is already
boiling a rather large river.  There's room for someone else to do more
work.  I know I did ;-)

Eliot

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