Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com) [LWN.net]

Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com)

Posted Oct 20, 2010 22:20 UTC (Wed) by zlynx (guest, #2285)
In reply to: Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com) by lutchann
Parent article: Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com)

I fail to see the point in complaining about "only" getting a /64.

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Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com)

Posted Oct 20, 2010 22:40 UTC (Wed) by lutchann (subscriber, #8872) [Link] (2 responses)

Due to certain design features of IPv6, a /64 is the shortest prefix that can be assigned to a broadcast link. If you need more than one link in your home or business, you need your ISP to delegate you a prefix shorter than /64.

Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com)

Posted Oct 21, 2010 5:50 UTC (Thu) by jengelh (subscriber, #33263) [Link] (1 responses)

For stateless autoconfiguration using NDP I can see why one would need a /64, but are there other reasons besides it?

Level Up to IPv6 with Ubuntu 10.10 on Comcast (Linux.com)

Posted Oct 21, 2010 13:07 UTC (Thu) by lutchann (subscriber, #8872) [Link]

Yeah, SLAAC is broken for sure, and some DHCPv6 implementations refuse to run with any link prefix other than /64. If you do manual address configuration, it'll probably be fine.