Re: [netmod] Link-local address
Jürgen Schönwälder <j.schoenwaelder@jacobs-university.de> Fri, 23 July 2021 20:18 UTC
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Date: Fri, 23 Jul 2021 22:18:27 +0200
From: Jürgen Schönwälder <j.schoenwaelder@jacobs-university.de>
To: Reshad Rahman <reshad=40yahoo.com@dmarc.ietf.org>
Cc: "'netmod@ietf.org'" <netmod@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/P-D1OhKPS8DVqsSQ0sN760ZOQsk>
Subject: Re: [netmod] Link-local address
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On Fri, Jul 23, 2021 at 03:37:08PM -0400, Reshad Rahman wrote:
> Hi,
>
> Are there any defined types for V4 and V6 link-local addresses? Didn’t see a definition in ietf-inet-types.
>
So far we stayed away from defining specific types for the different
"classes" of IP addresses, such as link-local or multi-cast or private
or loopback or ... addresses.
Since an ip-address (ipv4-address, ipv6-address) carries an optional
zone index, it should be possible to derive further types that add a
pattern for the specific prefixes, e.g. something like this:
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"
}
Translating the prefix into a pattern is a bit ugly but doable. The
pattern does not try to capture all restrictions but the description
clause takes care of this. ;-)
/js
--
Juergen Schoenwaelder 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/>
- [netmod] Link-local address Reshad Rahman
- Re: [netmod] Link-local address Jürgen Schönwälder