[140784] in North American Network Operators' Group
Re: IPv6 Conventions
daemon@ATHENA.MIT.EDU (Owen DeLong)
Wed May 18 23:26:06 2011
From: Owen DeLong <owen@delong.com>
In-Reply-To: <91704ACC-E2F4-4FD9-8F74-1136256E94D3@muada.com>
Date: Wed, 18 May 2011 20:21:35 -0700
To: Iljitsch van Beijnum <iljitsch@muada.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On May 18, 2011, at 8:05 AM, Iljitsch van Beijnum wrote:
> On 18 mei 2011, at 16:44, Todd Snyder wrote:
>=20
>> 1) Is there a general convention about addresses for DNS servers? NTP
>> servers? dhcp servers?
>=20
> 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.
>=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.
>=20
> 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.
>=20
>> 2) Are we tending to use different IPs for each service on a device?
>=20
> No, the same Internet Protocol.
>=20
I believe he meant different IP addresses and I highly recommend doing =
so.
If you do so, then you can move services around and name things =
independent of
the actual host that they happen to be on at the moment without having =
to renumber
or rename.
>> Finally, what tools do people find themselves using to manage IPv6 =
and
>> addressing?
>=20
> Stateless autoconfig for hosts, EUI-64 addressing for routers, VLAN ID =
in the subnet bits. That makes life simple. Simple be good.
>=20
Yep, where that works, those are fine ideas.
Owen
