Finisar Surveyor - Manual (Page 249)

10-45
Expert Features
Transport Layer
10
TCP Checksum Errors
Counter
TCP Checksum Errors is a counter of all incorrect TCP checksums over a period of
time per segment. A count of all TCP Checksum Errors events displays in the
Overview counters of Expert View.
Expert Symptom
TCP Checksum Errors events are automatically logged as expert symptoms. The
Symptom Summary field provides the IP source and destination address for the
checksum error. For example:
SA=[206.250.228.69] DA=[206.250.228.11]
Diagnostic Details
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Problem Description:
A TCP/IP packet has a checksum value that is in error.
The packet may be discarded.
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Probable Cause(s):
1. The station that sent this packet may have a faulty network stack.
2. The router that forwarded this packet may have a faulty stack.
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Recommended Action(s):
1. Identify the station that sent this packet (Source Addresses).
2. Verify the transport layer stack for this station.
3. The station may need to be reset.