Re: [netmod] draft-ietf-netmod-rfc6991-bis - ipv6-link-local address?

[Jeffrey Haas <[e-mail]>]

Jürgen,


> On Jan 13, 2022, at 5:49 AM, Jürgen Schönwälder <[e-mail]> wrote:
> 
> As pointed out by others, this is what I proposed back in July '21:
> 
> typedef ipv6-address-link-local {
>  type ipv6-address;
>  pattern '[fF][eE]80:.*';
>  description
>    "A link-local IPv6 address in the prefix fe80::/10 as defined
>     in section 2.5.6. of RFC 4291.";
>  reference
>    "RFC 4291: IP Version 6 Addressing Architecture";
> }
> 
> If this serves the purpose, I can add this definition to the
> inet-types module.

This example had been the first time I'd seen a pattern on top of a typedef with its own pattern.
That said, it seems to be what I would expect.

> 
> Will there also be a need to have an IPv4 equivalent?

For most of the routing technologies I have worked on, it's not a requirement.  But it's an appropriate gap to fill and will potentially be useful for other technologies.  E.g. BRAS.

> 
> typedef ipv4-address-link-local {
>  type ipv4-address;
>  pattern '169\.254\..*';
>  description
>    "A link-local IPv4 address in the prefix 169.254.0.0/16 as 
>     defined in section 2.1. of RFC 3927.";
>  reference
>    "RFC 3927: Dynamic Configuration of IPv4 Link-Local Addresses";
> }

-- Jeff