Finisar Surveyor - Manual (Page 261)

10-57
Expert Features
Transport Layer
10
Too Many Retransmissions
Counter
Too Many Retransmissions is a counter of events where the ratio of retransmissions
to packets sent exceeds a threshold value for a single station. A count of all Too
Many Retransmissions events displays in the
Overview counters of Expert View.
Expert Analysis
Too Many Retransmissions events are automatically logged as expert analyses. The
Symptom Summary field provides the retransmission ratio, showing the total
number of retransmissions divided by the total number of packets sent. For
example:
Retransmission ratio is (49 / 50) = 98%
The threshold value for this analysis can be changed. The default value is a 20%
retransmission ratio.
Diagnostic Details
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Problem Description:
The expert threshold for the ratio of retransmissions over packets sent has been exceeded.
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Probable Cause(s):
1. The network is overloaded.
2. The path to the receiving station has long delays.
3. There may be a problem with the receiver's TCP/IP stack.
4. There may be an overloaded switch or router.
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Recommended Action(s):
1. Load balance your network.
2. If you see repeated delays and too many retransmissions, your router or switch may
need upgrading.