Routing Table Problems

Routing table problems include but are not limited to:

• inactive routes

• unnecessary routes

• black hole routes

  

  Note

  Only black hole routes that belong to the static type protocol are supported. An inter-VRF black hole route is not installed in the routing table of the destination VRF on the same switch.

• flapping links (links that go up and come down) that cause the routes to flap

• incorrect route tables

• invalid Address Resolution Protocol (ARP) cache that causes incorrect IP to MAC assignment

• problems with administrative distance or other parameters

Important

Do not restart a device to clear a problem. In restarting the device, you also clear the logs. Logs are vital and can help determine many problems.