Finisar Surveyor - Manual (Page 308)

10-104
Surveyor
User’s Guide
CRC Frame counter
Counter
The CRC Frame counter increments when a frame has a CRC error and is greater
than 63 bytes in length. A count of all CRC Frames is included in the Bad Frames
counter. The CRC Frame counter is used for Expert Alarms.
Expert Symptom
CRC Frame events are automatically logged as expert symptoms. The Symptom
Summary field contains the following information:
CRC error with more than 63 bytes
Diagnostic Details
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Problem Description:
A packet with more than 63 bytes of data and a CRC error has been received.
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Probable Cause(s):
1. The network is overloaded, resulting in too many collisions.
2. A faulty hub/switch/router device.
3. An end station may have a faulty network interface card.
4. A protocol analyzer has been transmitting error packets.
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Recommended Action(s):
1. Find out the source device and fix the problem.