One of our cisco 4500 series L3 switch is not accepting "no switchport" comand on its Gig port. As of now the port is L2.
Giving below message after executing command "no switchport" on gig interface:-
Command rejected: Not a convertible port.
IoS version on the switch is :-
System image file is "bootflash:cat4000-i9k91s-mz.122-20.EWA4.bin"
cisco WS-C4507R (MPC8245) processor (revision 4) with 524288K bytes of memory
What could be the reason for the message ...how to overcome the problem..