DFN 6014 | CHAPTER 3 : MULTIAREA OSPFv3 | TROUBLESHOOTING STEPS IN MULTIAREA OSPFv3

1. Multiarea OSPF Troubleshooting Data Structures

1.1. Interface table

1.1.1. • Includes a list of all active OSPF interfaces. • Type 1 LSAs include the subnets associated with each active interface.

1.2. Neighbor table

1.2.1. • Used to manage neighbor adjacencies through hello timers and dead timers. • Neighbor entries are added and refreshed when a hello is received. • Neighbors are removed when dead timer expires.

1.3. Link-state database (LSDB)

1.3.1. • This is the primary data structure used by OSPF to store network topology information. • It includes full topological information about each area that the OSPF router is connected to and any paths that are available to reach other networks.

1.4. Routing table

1.4.1. • After the SPF algorithm is calculated, the best routes are offered to the routing table

2. Verify Multiarea OSPFv3

2.1. Use the show ipv6 protocols command to verifyOSPFv3.

2.2. Use the show ipv6 interface brief to verify the OSPFv3-enabled interfaces and the area to which they belong.

2.3. Use show ipv6 route ospf to display the routing table.

2.4. Use show ipv6 ospf database to display the contents of the LSDB.

3. Troubleshoot OSPFv3

3.1. Step 1: Test IPv6 end-to-end connectivity.

3.2. Step 2: Verify that IPv6 unicast routing has been enabled on all routers.

3.3. Step 3: Verify that all interfaces are assigned to the proper OSPFv3 areas

3.4. Step 4: Verify that all interfaces are assigned to the proper OSPFv3 areas

3.5. Step 5: Verify that all interfaces are assigned to the proper OSPFv3 areas

3.6. Step 6: Verify that all routers have correct neighbor adjacency information.

3.7. Step 7: Verify OSPFv3 routing information.

3.8. Step 8: Verify IPv6 end-to-end connectivity.