As per RFC 4291, a single interface of a router can be configured with multiple IPv6 addresses. All Cisco IOS release with IPv6 support, a router interface can be configured with multiple IPv6 global addresses within the same prefix.
In this document, interface FastEthernet 0/0 of Cisco Router 3745 is configured with multiple IPv6 addressed with command "ipv6 address".
Note: The configuration is tested on Cisco 3745 router running C3745-ADVIPSERVICESK9-M, Version 12.4(25d).
Enter configuration commands, one per line. End with CNTL/Z.