Re: [netmod] Comments on draft-ietf-netmod-acl-extensions

[Oscar González de Dios <[e-mail]>]

Hi Mahesh, Med,

   Comments inline,

Oscar

De: [e-mail] <[e-mail]>
Enviado el: lunes, 24 de julio de 2023 15:48
Para: Mahesh Jethanandani <[e-mail]>; NetMod WG <[e-mail]>
CC: [e-mail]; Oscar González de Dios <[e-mail]>
Asunto: RE: [netmod] Comments on draft-ietf-netmod-acl-extensions

Hi Mahesh,

Thank you for the comments.

Please see inline. I let my co-author further comment as appropriate.

Cheers,
Med

De : netmod <[e-mail]<mailto:[e-mail]>> De la part de Mahesh Jethanandani
Envoyé : lundi 24 juillet 2023 14:53
À : NetMod WG <[e-mail]<mailto:[e-mail]>>
Objet : [netmod] Comments on draft-ietf-netmod-acl-extensions

I do support this work to extend the ACL model defined in RFC 8519.

What I suggested on the mike was that the ICMP types be defined in an existing IANA YANG module. But my own search did not reveal an existing model that has type definitions where ICMP types could be added. I would suggest that the authors name the module something more generic than iana-icmp-types simply to allow future additions to the model for other type definitions, something like iana-acl-header-types.

[Med] The new IANA ICMP type module can be used by models other than ACL-specific ones. I prefer to not have acl in the IANA module.

[Oscar] I also agree with Med on having ICMP types in a specific file to match 1:1 with an IANA  registry (https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xml) . Other type definitions should have also their own IANA maintained module. In fact... ICMPv6 has a separate registry which should be added too ...

The other question relates to how ICMP type are currently defined in RFC 8519. Is there a plan to update that type to the new types that will be defined in the IANA module? Is there a plan to include ICMP subtype (called code in RFC 8519) both in the new IANA module, but also update RFC 8519 with the definition in the IANA module?

[Med] We aren't updating that part of 8519 because we are not approaching this as a bis. The new type is only used in the new extensions.

[Oscar] In fact, one of my questions of todays presentation at the end was .... Are we happy with current approach of augment-only? Should we opt for a new version of the yang model, the match vs ICMP code could be modified from matching vs a unit8 for type and code, match vs an identityref (which I guess is a non backwards compatible change).

Regards

Mahesh Jethanandani
[e-mail]<mailto:[e-mail]>






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