The log message:

fpc0 prds_packet_get_host_headers:Unsupported packets proto 10 for cpuNormal injection!

indicates that the system has received unsupported packets with protocol number 10 for CPU normal injection. These messages generally occur when the system encounters packets it does not recognize or support during packet processing.

In similar scenarios, such errors are associated with packet parsing issues where invalid packets are received. For instance, on platforms like MPC10E, such messages can occur due to invalid packets being processed by the sampler module.

The following messages repeatedly appear in the system logs:

%PFE-3: fpc0 prds_packet_get_host_headers:Unsupported packets proto 10 for cpuNormal injection!
%PFE-3: fpc0 expr_packet_inject_host: failed in prds_packet_get_host_headers

No Performance Impact:

• These error messages are debug-level logs that do not affect the system's overall performance.

The messages are triggered when the system receives unrecognized or unsupported packets. These expected debug logs caused by invalid or malformed packets can be safely ignored or suppressed.

To address the issue:

1. Log Suppression:

   • If the messages are too frequent or cluttering the logs, you can prevent these messages from being written to the syslog.
   • For instructions on suppressing specific syslog messages, refer to the following documentation:
     How to Prevent Certain Syslog Messages from Being Written to the Log File .

2. Verify the Packet Source:

   • If necessary, inspect the traffic flow to identify the source of the invalid packets. Tools like packet capture and monitoring can help pinpoint the issue.

3. Ignore the Logs:

   • As these logs do not impact system performance, they can be safely ignored unless they correlate with other system issues.