[ipv6-wg] is use of IF-ID 0 "clean"

Fri Jun 20 19:54:22 CEST 2014

On 6/20/14, Wilfried Woeber <Woeber at cc.univie.ac.at> wrote:
> Dear WG-folks,
>
> out of curiosity and because I got asked this question, here we go:
>
> Is the use of "0" as the interface ID in an IPv6 network "clean"?
> I haven't found any indication that "0" is reserved (as in IPv4), or
> should not be used, but there's a lingering feeling that it may cause
> trouble, somewhere, somehow.

Using all-zero IID forms a subnet-router anycast address:

http://tools.ietf.org/html/rfc4291#section-2.6.1

Also, I've read about linux hosts responding to fe80:: if it is
configured on any link on the router (though reads like a clear bug to
me, and maybe fixed already).

--a

>
> Any input appreciated, tia,
> Wilfried.
>
>