Finisar Surveyor manual Too Many Retransmissions, Retransmission ratio is 49 / 50 = 98%

Expert Features 10

Transport Layer

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.

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