Prefix selection process

Upon receiving a request, the DHCPv6 server selects the prefix and other configuration parameters from the address pool that is applied to the interface receiving the request. An address pool may contain the static prefixes configured for specific clients, or have a prefix pool referenced for dynamic assignment from the specific prefix range.

A DHCPv6 server selects a prefix from the address pool according to the following sequence:

1. The desired static prefix with the DUID and IAID matching those of the client

2. The static prefix with the DUID and IAID matching those of the client

3. The desired static prefix with the DUID matching the client's DUID and with no client IAID specified

4. The static prefix with the DUID matching the client's DUID and with no client IAID specified

5. The desired idle prefix in the prefix pool

6. An idle prefix in the prefix pool