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

Carlos Martinez-Cagnazzo carlos at
Mon Jan 24 08:35:17 CST 2011

Doing a little introspection, I found myself realizing that one of the
most bothersome aspects of the /64 boundary (for me, just speaking for
myself here) is exactly that, the tendency to the hardcoding of boundaries.


On Mon, Jan 24, 2011 at 12:26 PM, Phil Regnauld <regnauld at> wrote:
> bmanning at (bmanning) writes:
>>  as a test case, i built a small home network out of  /120. works just fine.
>> my home network has been native IPv6 for about 5 years now, using a /96 and IVI.
>> some thoughts.  disable RD/RA/ND.
>>               none of the DHCPv6 code works like DHCP, so I re-wrote
>>                       client and server code so that it does.
>>               static address assignment is a good thing for services like DNS/HTTP
>>               secure dynmaic update is your friend
>> summary - its not easy, vendors don't want to help.  but it can be done.
>        Right - /64 is an assumption that's hardcoded many places.
>        But it does work.

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