Re: Choice of address for IPv6 default gateway

[Owen DeLong <owen () delong com>]

On Jan 25, 2012, at 7:06 AM, Leo Bicknell wrote:

> In a message written on Wed, Jan 25, 2012 at 03:41:36PM +0100, Daniel STICKNEY wrote:
> > I've seen some documentation using <prefix>::1 with either a global
> > prefix or link-local (fe80::1). Anyone use either of these in production
> > and have negative or positive feedback? fe80::1 is seductive because it
> > is short and the idea of having the same default gateway configured
> > everywhere might be simple. At the same time using the same address all
> > around the network seems to invite confusion or problems if two
> > interfaces with the address ever ended up in the same broadcast domain.
>
> I don't think the industry has really found a best practice to
> document yet.  There are people trying different ideas.  We find
> the following convention allows us to keep things organized:
>
> <prefix>::1                  - Default gateway
> <prefix>::<last octect IPv4> - Statically assigned servers.
> <prefix>:<eui-64>            - Auto-configured host
>
> If you need them to co-exist, you can also do things like:
>
> <prefix>::<10240-20480>        - DHCP Pool

I'll note that 10240-20480 are not valid IPv6 suffixes and that you
would need to represent that as <prefix>::<2800-5000> and would
probably be better off to use something more like <prefix>::8:* as
your DHCP pool.

Owen