Reference Guide

660 | Open Shortest Path First (OSPFv2 and OSPFv3)
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Troubleshooting OSPFv2
FTOS has several tools to make troubleshooting easier.
Be sure to check the following, as these are typical issues that interrupt an OSPFv2 process.
• Has OSPF been enabled globally?
• Is the OSPF process active on the interface?
• Are adjacencies established correctly?
• Are the interfaces configured for Layer 3 correctly?
• Is the router in the correct area type?
• Have the routes been included in the OSPF database?
• Have the OSPF routes been included in the routing table (not just the OSPF database)?
Some useful troubleshooting commands are:
•
show interfaces
• show protocols
• debug IP OSPF events and/or packets
• show neighbors
• show routes
To view the state of all the enabled OSPFv2 processes, use the following commands.
Note: This is not a comprehensive list, just some examples of typical troubleshooting checks.
Command Syntax Command Mode Usage
show running-config ospf EXEC Privilege View the summary of all OSPF process IDs enables on the
router.
show ip route summary EXEC Privilege View the summary information of the IP routes.
show ip ospf database EXEC Privilege View the summary information for the OSPF database.
show ip ospf neighbor EXEC Privilege View the configuration of OSPF neighbors connected to the
local router.
show ip ospf timers
rate-limit
EXEC Privilege View the LSAs currently in the queue.