[116708] in North American Network Operators' Group
Re: IPv6 Addressing Help
daemon@ATHENA.MIT.EDU (David Freedman)
Fri Aug 14 12:48:33 2009
Date: Fri, 14 Aug 2009 17:45:29 +0100
From: David Freedman <david.freedman@uk.clara.net>
To: Jon Lewis <jlewis@lewis.org>
In-Reply-To: <Pine.LNX.4.61.0908141236400.4187@soloth.lewis.org>
Cc: Nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Jon Lewis wrote:
> On Fri, 14 Aug 2009, David Freedman wrote:
>
>> Will keep it simple, this is what I (and I suspect many others) do
>>
>> /128 - Loopback (what else?)
>> /126 - Router p2p
>> /112 - Router LAN shared segments (p2mp)
>
> Why even go that big on LAN segments? i.e. If you have a LAN/VLAN where
> you have say 20 devices (routers, switches, etc.) and know you'll never
> have more than say 50-100 devices, why not go as far as using a /120?
Actually, this is where I start to move from "conserve addressing
the good old way (tm)" to "Make it look readable"
$ sipcalc 2001:dbb::/64 --v6split=112 | grep \: | head -n9
- -[ipv6 : 2001:dbb::/64] - 0
Network - 2001:0dbb:0000:0000:0000:0000:0000:0000 -
2001:0dbb:0000:0000:0000:0000:0000:ffff
Network - 2001:0dbb:0000:0000:0000:0000:0001:0000 -
2001:0dbb:0000:0000:0000:0000:0001:ffff
Network - 2001:0dbb:0000:0000:0000:0000:0002:0000 -
2001:0dbb:0000:0000:0000:0000:0002:ffff
Network - 2001:0dbb:0000:0000:0000:0000:0003:0000 -
2001:0dbb:0000:0000:0000:0000:0003:ffff
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iEYEARECAAYFAkqFlKgACgkQtFWeqpgEZrJsGwCdEUcD99wpMhKvWVmxv3rogMk+
9V8An3uXswYKdE6B5Ab3AdYPTrK6otfy
=xVBB
-----END PGP SIGNATURE-----
