Finisar Surveyor manual Excessive ARP, Rate of change of ARP Requests=20

Expert Features 10

MAC Layer

Excessive ARP

Counter

The Excessive ARP counter increments when a change in the number of ARP requests per second exceeds a threshold. A count of all Excessive ARP events displays in the Overview counters of Expert View. A threshold for this counter can be set in Expert Alarms.

Expert Symptom

Excessive ARP events are automatically logged as expert symptoms. The Symptom Summary field provides information about the rate of change for ARP requests. For example:

Rate of change of ARP Requests=20

This threshold value for this symptom can be changed. The default threshold is a delta of 10 ARP requests per second.

Diagnostic Details

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Problem Description:

The expert threshold for ARP Broadcasts has been exceeded for this segment, resulting in an Excessive ARP symptom.

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Probable Cause(s):

1.The network is overloaded.

2.Variations in application traffic patterns.

3.Heavy Internet usage.

4.Too many new TCP/IP connections.

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Recommended Action(s):

1.Load balance your network.

2.If you see repeated overloads and too many retransmissions, your router or switch may need upgrading.

Your network may have just come up after a power down; if so, ignore this problem.

3.If there is a high level of Internet usage, then ignore this message.

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