Auto MDI Issue

pradip.saha · ‎05-21-2010

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

Ganesh Hariharan · ‎05-21-2010

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

Hi,

Cisco 2950 don't support auto-mdi/mdix, so i would suggest to begin with the correct cable.

Hope to Help !!

Ganesh.H

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pradip.saha · ‎05-21-2010

Hi Ganesh,

This is not the actual issue.

Actual issue is POE line cards does not work with auto mdi enabled. So, we have disabled power-line in interface config mode to get the issue resolved.

Thanks & Regards

Leo Laohoo · ‎05-22-2010

with auto duplex & speed on

Hold on. What do you mean by "speed on"? Auto MDI/MDI-X works if speed and duplex are set to AUTO. If either one is hard-coded then auto-mdix is disabled.