IPv6 not abale to enable at interfaces

Dear All,

I faced an issue in configuring Global IPv6 add in the router interfaces, I am able to configure link -local addresses without any issue.

any idea, is there any other command required to enable this feature. I see only IPV^ unicast-routing as the only command to enable the ipv6 routing in the routing.

Rack14R2(config)#ipv6 unicast-routing

Rack14R2(config)#interf fa0/0
Rack14R2(config-if)#ipv
Rack14R2(config-if)#ipv6 add
Rack14R2(config-if)#ipv6 address 2001:ccie:14:202::/64 eui-64                                                        ^
% Invalid input detected at '^' marker.
                                                                                                                                        
Rack14R2(config-if)#ipv6 address 2001:ccie:14:202::/64
% Incomplete command.
                                                                                                                                         
Rack14R2(config-if)#
Rack14R2(config-if)#ipv6 address 2001:ccie:14:202::/64?
WORD
                                                                                                                                         
Rack14R2(config-if)#ipv6 address 2001:ccie:14:202::/64 ?
  X:X:X:X::X/<0-128>  IPv6 prefix
                                                                                                                                         
Need your advice to continue further.

Thanks