Revision history [back]

For debugging a Duplex there are mostly 2 ways_ -1st way: If your switch has some port counter you would see CRC error on a duplex mismatch port -2nd way: If you have a tap you can bring it in between the switch port and the device, and then you should see corrupted ethernet CRCs - a mirror port is not enough as a mirror port eliminates the frames with corrupted CRC errors.

But maybe your issue is on the uplink of the switch, where the devices with the problem are located.

For debugging a Duplex there are mostly 2 ways_ ways

-1st way: If your switch has some port counter you would see CRC error on a duplex mismatch port port

-2nd way: If you have a tap you can bring it in between the switch port and the device, and then you should see corrupted ethernet CRCs - a mirror port is not enough as a mirror port eliminates the frames with corrupted CRC errors.

But maybe your issue is on the uplink of the switch, where the devices with the problem are located.