I am working on a 4321, IOS-XE version 03.16.04b.S, IOS version 15.5(3)S4b. I am trying to enable DHCPv6 prefix delegation. On previous IOS-based routers this is done by going to interface configuration ("int gx/x/x") and using the "ipv6 dhcp client pd <name>" option.
My 4321 doesn't seem to have this option, or any client option at all! :
4321(config-if)#ipv6 dhcp ?
framed Framed-IPv6-Prefix allocation
relay Act as an IPv6 DHCP relay agent
server Act as an IPv6 DHCP server
4321(config-if)#ipv6 dhcp client pd PD
^
% Invalid input detected at '^' marker.
4321(config-if)#
What's going on?
