Troubleshooting OSPF: Show Commands and Debug Commands

Relevant Debug and Show Commands 

1. OSPF Show Commands
2. OSPF Debug Commands 

OSPF Show Commands

• Show IP Protocols 
• Data Displayed by the command:
• OSPF Status and process-id
• area types configured
• protocols being redistributed
• networks being advertised
• neighbors/gateways
• helpful in troubleshooting:
• neighbor relationships
• missing routes
• summarization issues 
• filtering problems 
• Show IP route OSPF
• Data Displayed by the Command;
• OSPF routes from neigbors
• administrative distance
• cumulative cost metric
• route source/interface
• helpful in troubleshooting:
• missing routes 
• summarization issues 
• filtering problems
• general troubleshooting 
• Show IP OSPF Interfaces
• Data Displayed:
• Interfaces participating in OSPF
• Network Type(s)
• Neighbor count
• Authentication Type
• Timer Values
• Helpful in troubleshooting:
• neighbor relationships
• local congiuration issues
• routing problems
• Show IP OSPF Neighbors
• data displayed:
• Active fully adjacent neighbors
• router ID of neighbors
• IP address/interface of neighbors
• dead time of neighbors
• neighbor state/DR state (designated router state)
• Helpful for;
• Neighbor relationships
• local configuration issues
• Show IP OSPF Database
• Data Displayed:
• LSA types Per area
• Advertising router
• Link ID(Subnet)
• age
• Helpful For:
• Missing Routes
• Filtering Problems
• General troubleshooting