IPv6 Conventions

Wed May 18 15:21:06 UTC 2011

On May 18, 2011 8:07 AM, "Iljitsch van Beijnum" <iljitsch at muada.com> wrote:
>
> On 18 mei 2011, at 16:44, Todd Snyder wrote:
>
> > 1) Is there a general convention about addresses for DNS servers? NTP
> > servers? dhcp servers?
>
> There are people who do stuff like blah::53 for DNS, or blah:193:77:81:20
for a machine that has IPv4 address 193.177.81.20.
>
> For the DNS, I always recommend using a separate /64 for each one, as that
way you can move them to another location without having to renumber, and
make the addresses short, so a ::1 address or something, because those are
the IPv6 addresses that you end up typing a lot.
>
> For all the other stuff, just use stateless autoconfig or start from ::1
when configuring things manually although there is also a little value in
putting some of the IPv4 address in there. Note that 2001:db8::10.0.0.1 is a
valid IPv6 address. Unfortunately when you see it copied back to you it
shows up as 2001:db8::a00:1 which is less helpful.
>
> > 2) Are we tending to use different IPs for each service on a device?
>
> No, the same Internet Protocol.
>
> > Finally, what tools do people find themselves using to manage IPv6 and
> > addressing?
>
> Stateless autoconfig for hosts, EUI-64 addressing for routers, VLAN ID in
the subnet bits. That makes life simple. Simple be good.
>

You may want to use some randomness to limit address scanning.  Ymmv on how
well this works or applies, I do it.

Cb
>