Finisar Surveyor manual Icmp Source Quench

Expert Features 10

Network Layer

ICMP Source Quench

Counter

ICMP Source Quench events are counted in the ICMP All Errors counter. A count of all ICMP errors displays in the Overview counters of Expert View. A threshold can be set in Expert Alarms for all ICMP errors.

Expert Symptom

ICMP Source Quench events are automatically logged as expert symptoms. The Symptom Summary field provides information about the IP addresses involved. Examples are:

Sent by Destination Host [206.250.228.69] to [206.250.228.11]. SA=[206.250.228.11] DA=[206.250.228.69]

Sent by Gateway Host [206.250.228.61] to [206.250.228.11] when forwarding to Destination [206.250.228.69]. SA=[206.250.228.11] DA=[206.250.228.69]

Diagnostic Details

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Problem Description:

An ICMP Source Quench message has been sent.

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Probable Cause(s):

1.If a router has a buffer space problem, it may send this message.

2.A host may send this message if it can’t keep up with processing of packets and is reaching its limits.

3.The network may be overloaded.

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Recommended Action(s):

1.Check the routing table buffer statistics and upgrade the router if problem persists.

2.If the message is from a host, you may need to upgrade its resources.

3.Increase the bandwidth of your network to reduce network overload.

4.If the message is infrequent, ignore it. The problem will rectify itself.

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