Router(config)#ipv6 unicast-routing ^ % Invalid input detected at '^' marker. Router(config)#ipv6 ? % Unrecognized command Directory of flash:/ 1 -rw- 37175292 Dec 23 2013 22:09:34 +00:00 c2801-spservicesk9-mz.124- 15.T13b.bin 63983616 bytes total (26808320 bytes free) Router# Router#dir flash: Directory of flash:/ 1 -rw- 28233996 Sep 8 2010 08:08:52 +00:00 c1841-spservicesk9-mz.124- 15.T13b_2.bin 2 -rw- 23078024 Jun 11 2010 14:54:24 +00:00 c1841-ipbase-mz.124-15.T10 .bin 3 -rw- 30149668 Sep 8 2010 08:04:58 +00:00 c1841-entservicesk9-mz.124 -15.T13b.bin 4 -rw- 34134116 Aug 3 2010 14:12:32 +00:00 c1841-advipservicesk9-mz.1 24-15.T13b.bin 125820928 bytes total (10207232 bytes free) Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#ipv6 ? % Unrecognized command