Configuring the Open Shortest Path First Protocol
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Displaying Information on Neighbor Routers
You can display about neighboring routers on each interface within an OSPF area.
Field Attributes
• ID – Neighbor’s router ID.
• Priority – Neighbor’s router priority.
• State – OSPF state and identification flag.
States include:
- Down – Connection down
- Attempt – Connection down, but attempting contact (non-broadcast networks)
- Init – Have received Hello packet, but communications not yet established
- Two-way – Bidirectional communications established
- ExStart – Initializing adjacency between neighbors
- Exchange – Database descriptions being exchanged
- Loading – LSA databases being exchanged
- Full – Neighboring routers now fully adjacent
Identification flags include:
- D – Dynamic neighbor
- S – Static neighbor
- DR – Designated router
- BDR – Backup designated router
• Address – IP address of this interface.
Web - Click Routing Protocol, OSPF, Neighbor Information.
Figure 20-18 OSPF Neighbor Information
CLI - This shows a designated router and backup designated router as neighbors.
Console#show ip ospf neighbor 42-50
ID Pri State Address
--------------- ------ ---------------- ---------------
10.2.44.5 1 FULL/DR 10.2.44.88
10.2.44.6 2 FULL/BDR 10.2.44.88
Console#
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