| Message Code | ASA-3-421003 |
| Severity | Error |
| Description | Invalid data plane encapsulation. |
| Explanation | A packet injected by the service module did not have the correct data plane header. Packets exchanged on data backplane adhere to a Cisco proprietary protocol called ASDP. Any packet that does not have the proper ASDP header is dropped. |
| User Action | Use the capture name type asp-drop [ssm-asdp-invalid-encap] command to capture the offending packets and contact Cisco TAC. |
| Reference Links |
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