Tunnel showing up over physical interface but showing down over protocol interface

Hi All.

Anyone working on networking side:

One query regarding eogre tunnel:

Tunnel is showing up over physical interface but it’s showing down over protocol interface.

Possible reasons:

  • Misconfiguration
  • Routing issues
  • Firewall issues
  • Hardware failure

You can try the following:

  1. Check the tunnel configuration: Make sure that the tunnel is configured correctly on both ends. Verify the IP addresses, subnet masks, encapsulation types, and any other relevant settings.

  2. Check the routing: Make sure that there are no routing issues on either end of the tunnel. You can use a traceroute to test the connectivity between the two ends of the tunnel.

  3. Check the firewall: Make sure that the firewall on either end of the tunnel is not blocking traffic. You may need to open the ports required for GRE traffic, or configure the firewall to allow GRE traffic.

  4. Check the hardware: If you have ruled out all of the above, it is possible that there is a hardware failure on either end of the tunnel. You can try connecting a different device to the tunnel interface to see if the issue persists.

Use a packet analyzer: A packet analyzer can be used to capture and analyze GRE traffic. This can be helpful for troubleshooting problems with GRE tunnels, such as misconfiguration or routing issues

can you try this …

ifconfig portid up ?

Can be several reasons, probably taking capture will help narrow down actual issue.