Ethernet Link query with Cisco 7609

[HCL Support]

Hi,

We have Cisco 7609 Router and one 6 Mbps link which is on ethernet . When we are trerminating on Gigaethernet of 7609 router it is not coming up. While same link is showing up and working fine on other routers which is having Ethernet interface.

Attaching here show version, show inventory, show module, show interface <port>, show run int <port.

Regards,

Ashutosh

[vmiller]

your show interface commands indicate Frame and CRC errors.

double check and test your L1 stuff.

take all the speed and bandwidth commands off.

try and connect it to a known good switch and see if it connects. don't pass any traffic.

then try your other link.

[kaflinqalex3]

1. Check Physical Connection: Ensure the Ethernet cable is securely connected to both the Cisco 7609 router and the device.
2. LED Status Indicators: Check the LED status indicators on the Ethernet port to determine if there are any connectivity issues.
3. Port Configuration: Verify that the Ethernet port on the Cisco 7609 is properly configured with the correct speed and duplex settings.
4. Check Interface Status: Use the "show interface" command on the Cisco 7609 to check the status of the Ethernet interface.
5. Physical Layer Issues: Investigate any physical layer issues such as cable damage or interference.
6. Speed and Duplex Mismatch: Ensure that the speed and duplex settings on both ends of the Ethernet link match.
7. Check VLAN Configuration: Verify that the VLAN configuration on the Cisco 7609 is correct with app and matches the device on the other end of the Ethernet link.
8. Update Firmware: Ensure that the Cisco 7609 router has the latest firmware installed to address any known Ethernet link issues.
9. Test with Different Device: Test the Ethernet link with a different device to determine if the issue is specific to the Cisco 7609 or the connected device.
10. Check for Errors: Use the "show interfaces <interface> | include errors" command on the Cisco 7609 to check for any errors on the Ethernet interface.
11. Power Cycle: Try power cycling the Cisco 7609 router and the connected device to reset any potential issues.
12. Verify IP Configuration: Confirm that the IP configuration (IP address, subnet mask, gateway) is correctly configured on both ends of the Ethernet link.
13. Spanning Tree Protocol (STP): Check the STP configuration on the Cisco 7609 to ensure there are no blocking ports causing connectivity issues.
14. Update Drivers/Firmware: If applicable, update the drivers or firmware of the connected device to ensure compatibility with the Cisco 7609.
15. Engage Cisco Support: If the issue persists, engage Cisco support for further troubleshooting and assistance.