I have one 4506E with sup card cp-wx45-sup6l-e and line card wx4648e running IOS version 12.2 (53) sg2. Other end is connected to 2950, IOS 2.1`(22).
Auto MDI is enabled on line card wx4648e with auto duplex & speed on. But operational status of the port is going down when I am connecting with a straight cable. With crossover cable it is working fine.
Waiting for urgent reply.
Thanks & Regards