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.
Will there also be a need to have an IPv4 equivalent?
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";
}
/js
On Thu, Jan 06, 2022 at 04:54:09PM -0500, Jeffrey Haas wrote:
> Mahesh suggested I send this suggestion here.
>
> Several IPv6 routing protocols have circumstances where the only acceptable
> address is an ipv6 link-local address.
>
> The YANG type we have for ipv6 can accommodate ipv6 link local addresses,
> however it's overly permissive for some use cases.
>
> Has the Working Group considered adding a typedef for ipv6 link-local?
>
> FWIW, the current use case under consideration is operational state for BGP
> IPv6 routes conforming to RFC 2545 and related work under consideration in
> IDR for link-local only BGP peering. In such circumstances, the BGP nexthop
> will contain a component that may only be ipv6 link-local.
>
> For the BGP YANG module, the edits under consideration will currently use the
> ipv6 type. Since the current use case is operational only state, the lack of
> the more restrictive type is not considered a blocker. For the future
> link-local-only work, configuration state will be needed.
>
> -- Jeff
>
--
Jürgen Schönwälder Jacobs University Bremen gGmbH
Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany
Fax: +49 421 200 3103 <https://www.jacobs-university.de/>
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