Here you specify the length of the prefix assigned to the remote user by the router advertisement. The size of the dial-in pool depends directly on the first and last prefix. Each user is assigned precisely one /64 prefix from the pool.
Attention: In order for a client to be able to form an IPv6 address from the auto-configuration prefix, the prefix length must always be 64 bits.
    - SNMP ID:
 - 2.70.2.6.4
 - Console path:
 - Setup > IPv6 > Router-Advertisement > Prefix-Pools
 - Possible values:
 Max. 3 characters from 0123456789
- Default:
 - 64