I get the following when trying to create a vlan interface on a RSFC in a 5500/Super3G (CatOS 6.3.2), RSFC is IOS 12.1(9)
router(config)#int vlan ?
<1-1000> Vlan interface number
router(config)#int vlan 1000
^
% Invalid input detected at '^' marker.
(under the "l" in vlan - font changes the position of the ^)
Even though vlan 1000 is active in the domain, and is listed as a valid value, it will not let me create the router interface. This command works fine on a 6506/Super2/MSFC2/PFC2 running 6.3.2/12.1(8a)E4.
Should I open a TAC case? I worked around it by using vlan999 instead, and moving all my hosts/access ports.