Cisco Switch Hardware Catalyst 2960X-48FPD-L

Is any port error-disabled, disabled, or shut down?

Re-enable the port if necessary

Verify the status of all PoE ports

Is any PoE port error-disabled, disabled, or shut down?

Re-enable the PoE port if necessary

Exchange the cable with a known good cable

Inspect cable connectors for issues

Check for bad patch panel connections or media convertors

Bypass patch panel or eliminate media convertors if possible

Test the cable in another port to see if the problem follows the cable

Inspect stack cable and stack port for bent pins or damaged connectors

Verify correct cable type for Ethernet

Get a replacement switch with the same model number as the failed switch.

Ensure the replacement switch is off and the FlexStack module is installed.

Connect the replacement switch to the stack.

Replicate the connections from the failed switch to the replacement switch.

Reinstall any modules and make cable connections.

Power on the replacement switch.

Verify link status on both sides

Troubleshooting if Port LED is Off

Connect the cable from the switch to a known good device

Ensure both ends of the cable are connected to the correct ports

Verify that both devices have power

Verify the correct cable type is used

Check for loose connections and reseat the cable

Inspect the network module and SFP module

Exchange the suspect module with a known good module

Module Compatibility Verification

Verify that the module is supported on this platform

Use the show interfaces privileged EXEC command to check port or module status