For cellular networks with IPv6 support, the support of DHCPv6 prefix delegation is only expected to be provided with 3GPP Release 10. So for cellular networks earlier than Release 10, the only way to assign just one /64 prefix to a terminal device is, for example, by using router advertisements. In the case of smartphones or laptops, this method allows IPv6 support to be implemented relatively simply. However, each IPv6 router needs at least one additional prefix that it can propagate to clients on the LAN.
IPv6 prefix delegation from the WWAN into the LAN makes it possible for clients to use the /64 prefix, as assigned on the WAN cellular network side, to be used on the LAN. This makes it possible to operate a router in an IPv6 cellular network without DHCPv6 prefix delegation and neighbor discovery proxy (ND proxy). The router announces the assigned /64 prefix by router advertisement on the LAN, rather than adding it at the WAN interface. Clients can then generate an address from this prefix and use it for IPv6 communication.
This option allows you to set the way in which the router performs the prefix delegation:
- DHCPv6: Prefix delegation via DHCPv6
- Router advertisement: Prefix delegation via router advertisement, in which case the DHCPv6 client is not activated.
- Telnet path:
- Possible values:
- DHCPv6
- Router advertisement
- Default:
- DHCPv6