The minimum required IOS release for the static routing feature in each train is generally the one where IPv6 became first available, that is 12.0(21)ST, 12.0(22)S, 12.2(2)T, 12.2(14)S, 12.3(2)T, 12.3(1)M.

Before configuring the router with a static IPv6 route you must enable the forwarding of IPv6 packets using the ipv6 unicast-routing global configuration command. Then enable IPv6 on at least one interface by configuring an IPv6 address on it, which can be accomplished with the command ipv6 address in the respective interface’s context.