Learn how to troubleshoot link flapping issue. Our Server Management Support team is here to help you with your questions and concerns.

How to troubleshoot the link flapping issue

Link flapping is when a network link repeatedly goes up and down. This causes intermittent connectivity issues.

Here are some troubleshooting tips to help resolve the issue:

• Check the physical connections of the affected link.
• Analyze the logs on network devices to identify any error messages or warnings related to the flapping link.
• Ensure that the link parameters, such as speed and duplex settings, are correctly configured and match on both ends of the link.
• Verify that the link negotiation is functioning correctly, or manually set the link parameters if necessary.
• Check the network traffic and link utilization during the flapping incidents.
• Analyze if there are any specific applications, devices, or activities that coincide with the link flapping.
• Ensure that the firmware or software on network devices, such as routers or switches, is up to date.
• Review the network topology to identify any loops, spanning tree misconfigurations, or other issues that may lead to link flapping.

Network Flapping- Copper Ports: Troubleshooting Tips

If the link light is solid green, it means that the link is up. In case the link is not up or the LED is not solid green then follow these steps:

1. First, check if the cable has been physically damaged.
2. Then, check the correct cable type has been used.
3. Our experts recommend trying different patch interfaces in case we are using one.
4. Next, check the speed or duplex setting on both sides of the link and modify the same if required.
5. Then, verify if the cable distance is within specification for the connection type.
6. If a different interface is available, our experts suggest moving the existing non-working connection to that port.

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Conclusion

To conclude, our Support Techs demonstrated how to troubleshoot link flapping issue.