nanog mailing list archives

Re: Using IPv6 with prefixes shorter than a /64 on a LAN


From: Valdis.Kletnieks () vt edu
Date: Tue, 01 Feb 2011 22:47:31 -0500

On Tue, 01 Feb 2011 17:37:55 PST, Bill Stewart said:
A typical home user will have a /56 of GUA, or maybe a /48 with some
ISPs.  Anybody who knows enough to figure out how to set a ULA can
figure out a /64 from their GUA space that's not being auto-assigned
by one of their various home routers.  So if that's the way you want
to do things, it won't cost you or your ISP anything.

Your local home network topology may not allow easy choice of a
/64, if you have multiple actual subnets - if it all fit into one /64, why did
you need/want that /56 or /48 in the first place?)

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