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

On 6/20/14, Wilfried Woeber <Woeber@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.