Address assignment for the GTPv6 IPv6 experiment

A number of NRENs within GEANT already have production IPv6 address space. A full listing of current SubTLAs is available from RIPE.

RIPE has also subscribed to the global Provisional IPv6 Assignment and Address Allocation Policy Document.

This section describes the address allocation methods used in the QTPv6 network under the former TF-TANT activities. It is expected that GTPv6 will use RIPE production IPv6 address space.

The procedure for allocation of IPv6 Addresses has only recently been specified  [rfc2450].

Like in the IPv4 case, the TEN-155 network would provide two services:

     Connectivity between the NRNs
     General IP connectivity to subset of NRNs

Another service that DANTE could offer is to act as backup provider to NRNs. As a minimal requirement each NRN should be assigned a unique NLA, DANTE should try to apply for a Sub-TLA. With the currently proposed assignment rules it is unlikely that 19 bits of NLA space will be assigned, but the minimal requirements must at least be possible within the assigned NLA bits. General address assignment issues will be examined as part of the tests.

The IPv6 testing group has been assigned the 3ffe:8030::/28 for the experiments. The overall addressing herachy are defined as follows:
 

Each participant will be allocated an unique NLA, thus a participant will receive a /34 prefix.  Assignment plan for a /34 are in basic up to the participant, but it is requested that the overall addressing herachy is used and that allocations follow the procedure described in "A method for flexible IPv6 address assignments".
 

With the given pTLA the NLA cannot be expanded to the left. Therefor the NLA's are assigned beginning from the left. This allows the SLA to expand in both directions. With the first NLA assigned to the Backbone and the following to the participants, the address assignment looks like this: