Failover IPv6 with multiple PA prefixes (Was: IPv6 fc00::/7 - Unique local addresses)

Christopher Morrow morrowc.lists at
Thu Nov 4 01:02:44 CDT 2010

On Thu, Nov 4, 2010 at 1:31 AM, Owen DeLong <owen at> wrote:
> On Nov 3, 2010, at 5:21 PM, Valdis.Kletnieks at wrote:
>> On Wed, 03 Nov 2010 17:01:32 PDT, Owen DeLong said:
>>> On Nov 3, 2010, at 3:43 PM, Mark Andrews wrote:
>>>> Actually PI is WORSE if you can't get it routed as it requires NAT or
>>>> it requires MANUAL configuration of the address selection rules to be
>>>> used with PA.
>>> It's very easy to get PIv6 routed for free, so, I don't see the issue there.
>> It may be very easy to get it routed for free *now*.
>> Will it be possible to get PIv6 routed for free once there's 300K entries in
>> the IPv6 routing table?  Or zillions, as everybody and their pet llama start
>> using PI prefixes?  (Hey, if you managed to get PI to use instead of using an
>> ULA, and routing it is "free", may as well go for it, right?)
> Hopefully by the time it gets to that point we'll have finally come up with a
> scaleable routing paradigm. Certainly we need to do that anyway. I'm not
> sure why we chose not to do that with IPv6 in the first place.

1) there were only going to be a limited number of ISP's
b) every end site gets PA only
iii) no need for pi
d) all of the above

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