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

Owen DeLong owen at
Tue Feb 1 20:27:47 CST 2011

On Feb 1, 2011, at 5:37 PM, Bill Stewart wrote:

> On 2/1/11, Chuck Anderson <cra at> wrote:
>> What would your recommended solution be then for disconnected
>> networks?  Every home user and enterprise user requests GUA directly
>> from their RIR/NIR/LIR at a cost of hunderds of dollars per year or
>> more?
> 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.
> If your ISP is only assigning you a /64 of GUA, that's another story.
If your ISP assigns you less than a  /48, ask them to fix it.

If they refuse, get a new ISP or use that ISP to connect a tunnel
to someone who will give you a /48.


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