6.3 OSPF Configuration and Verification  
  6.3.5 Clear and debug commands  
The following commands and their associated options can be used when troubleshooting OSPF:

To clear all routes from the IP routing table, use the following command:

Router#clear ip route *

To clear a specific route from the IP routing table, use the following command:

Router#clear ip route A.B.C.D
A.B.C.D Destination network route to delete

To debug OSPF operations, use the following debug options:

Router#debug ip ospf ?

adj OSPF adjacency events
events OSPF events
flood OSPF flooding
lsa-generation OSPF lsa generation
packet OSPF packets
retransmission OSPF retransmission events
spf OSPF spf
tree OSPF database tree

 

Lab Activity

e-Lab Activity: Clear and debug Commands

The purpose of this lab is to clear routes from the routing table and view OSPF debugging information.