[6bone] return of 3FFE IPv6 address block per RFC 3701

[Kevin Loch]

Robert Fink wrote:
> Dear IANA,
> 
> Per RFC 3701, "6bone (IPv6 Testing Address Allocation) Phaseout", the
> 6bone IPv6 Testbed network has been phased out as of the 6th of June
> 2006.
> 
> Therefore, also per RFC 3701, the 3FFE::/16 prefix allocated by RFC
> 2471 for IPv6 testing, can now be reclaimed by the IANA.
> 
> To the best of my knowledge, 6bone operators are making active efforts
> to stop further usage of the 3FFE prefix, and to filter where relevant
> and necessary. Let us hope they are successful.

Robert,

Thank you for following through on winding this up after many years of
operation.  I don't know if you are still associated with ESnet,
but they are still announcing 3ffe:700::/24.  Can you or anyone
you know there fix that?

All of the paths visible from sixxs are going through 2713, if that
helps.

- Kevin