Tool to create RFC4193 addresses

[David Gethings]

Hi All,

Does anyone know of a tool that will generate locally assigned unique  
local IPv6 addresses (RFC4193)? I am creating a test IPv6 network and  
would like to assign the IPv6 addresses properly (read "as according  
to to the latest RFCs").

I could create a tool but was wondering if one already existed.

Cheers

Dg