| Message Code | PIX-4-409011 |
| Severity | Warning |
| Description | OSPF detected duplicate router-id IP_address from IP_address on interface interface_name |
| Explanation | OSPF received a hello packet from a neighbor that has the same router ID as this routing process. A full adjacency cannot be established. |
| User Action | The OSPF router ID should be unique. Change the neighbor router ID. |
| Reference Links |
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