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Counter

ICMP Source Quench events are counted in the ICMP All Errors counter. A count 
of all ICMP errors displays in the 

 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 

 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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An ICMP Source Quench message has been sent. 

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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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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.