Subj : ULA
To   : Markus Reschke
From : Michiel van der Vlist
Date : Thu Jul 21 2016 13:38:46

Hello Markus,

On Thursday July 21 2016 12:15, you wrote to me:

 MvdV>> ULA is not used by SixXs to route between users. All SixXs does
 MvdV>> is to maintain a list of the /48 prefixes in use. To decrease
 MvdV>> the chance of duplication.

 MR> Are they using the algorithm in RFC4193?

Yes. You seed the random number generator wit a MAC address (presumably unique).

But is is an option, you do not have to use their generator, you can enter a self generated prefix for registration.

 MvdV>> It is not supposed to be globally routed, but it can be routed
 MvdV>> between (virtual) private networks. If one has routers
 MvdV>> supporting it. Mine doesn't.

 MR> It's simply RFC1918 for IPv6 ;)

With the difference that they can be globally unique and so cause no conflict when merging networks.


Cheers, Michiel

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