NAT66 and the subscriber prefix length

Eugeniu Patrascu eugen at
Sat Nov 22 19:36:21 UTC 2008

michael.dillon at wrote:
>> My gripe was that I wanted to get an IPv6 allocation from 
>> RIPE to start 
>> testing how IPv6 would fit in the company that I work for and build a 
>> dual stack network so that when the time comes, just switch 
>> on IPv6 BGP 
>> neighbors and update the DNS.
>> But at almost 10.000 EUR per year it's an experiment I can't afford.
> That is not an experiment.

I was hoping to do it in one step with my own IPv6 PI space and do the 
allocation and routing on the servers/routers/firewalls, see how that 
goes and when the time was right, just announce my prefix to the world :)

> An experiment is where you go to <>,
> generate your own unique RFC 4193 prefix, and then implement your IPv6
> network using that. When you are ready to switch on BGP peering with the
> rest of the world, get a /32 from your RIR, and renumber the network
> leaving
> the interface IDs the same.

Thanks for the URL, I was not aware of it. I guess I'll have to 
experiment with prefixes from that and see hot it goes.

> If you are concerned that renumbering will be hard, go back and generate
> another ULA, and renumber your network as part of your experiment. 

I'll probably do that also.


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