Hello,
The command was introduced in 12.2(2)T.
http://www.cisco.com/en/US/docs/ios/12_3/switch/command/reference/swi_m1.htm
l#wp1082792
So, any code version in 12.2T train or 12.3 train that was released after
12.2T should have support for that command.
Hope it helps.
Regards,
NT