I can't enable IPV6 in a Cisco 2800 router that runs iOS version 12.4T.
I followed the summary steps section in Cisco's web page . But whenever I type "ipv6" on the command line (as in 'ipv6 address' - Step 4 in the summary steps), I get an error message stating command not supported, with a caret pointing at the "v" in the ipv6. From the same web page, iOS versions greater than 12.2 should support IPv6.
What could be the problem? Do you need more data?