IPv6 Addressing Help
David Freedman
david.freedman at uk.clara.net
Fri Aug 14 16:45:29 UTC 2009
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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
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