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Error Indication in a Protocol Analysis SessionWhether the error is a CRC, Collision, Long/Short, or Jabber indicated by an Ethernet physical frame, it still indicates a possible NIC failure in the network peripheral. Swap the respective NIC and rerun another thorough a protocol analysis session on the segment. Some types of network peripherals have a NIC physically built into the motherboard. If this is the case, you may have to replace the whole unit. Refer to the manufacturer's instructions. After you swapped the NIC and reran a protocol analysis session, did the error go away?  Leave the newly replaced NIC in the network peripheral and record the
problem in the network maintenance and service log.
 Replace
the original NIC in the network periphera
l and
rerun
a protocol analysis session on the segment.
Sometimes by rerunning a
protocol analysis session, the failure cause becomes more clear by moving
to another Ethernet address.
If after rerunning a protocol analysis session the error does not move to another device and is still identifying the particular NIC address as a failure cause, troubleshoot the assigned segment area for the respective NIC. If after using these procedures you cannot locate the problem and continue to find failure symptoms that point to a network peripheral problem, refer to the manufacturer's instructions. November 15, 1996 
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