Hello, Verify Configuration: Double-check the configuration of the port channel and the interfaces involved. Ensure that the port channel configuration matches on both switches and that the interfaces are properly configured as members of the port channel. Check Compatibility: Confirm that the SFP-10G-LR modules you are using are compatible with your switches and meet the required specifications. Ensure that they are properly inserted and seated in the module slots. Verify Link Status: Check the link status on both ends of the connection. Ensure that the link lights are active and indicating a proper link connection. You can also check the interface status using the "show interface" command on the switch. Check Cable and Fiber Connections: Examine the fiber or copper cable connections to ensure they are securely connected. Verify that the cable type (single-mode or multimode) matches the SFP module specifications. Confirm Module Compatibility: Ensure that the C3KX-NM-10G modules are compatible with your switches and that they are installed correctly in the stack. Refer to the product documentation or contact the manufacturer for specific compatibility information. Reboot if Necessary: If you suspect that the modules may require a reboot to properly initialize, you can try rebooting the affected switch or the entire stack to see if that resolves the issue. However, this should be considered as a last resort and should be performed during a maintenance window. MyBKExperience Survey
