| Message Code | PIX-4-409005 |
| Severity | Warning |
| Description | Invalid length number in OSPF packet from IP_address (ID IP_address), interface_name |
| Explanation | The system received an OSPF packet with a field length of less than normal header size or inconsistent with the size of the IP packet in which it arrived. This indicates a configuration error in the sender of the packet. |
| User Action | From a neighboring address, locate the problem router and reboot it. |
| Reference Links |
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