Finisar Surveyor, User Manual

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10-70
Surveyor
User’s Guide
ICMP Fragment Reassembly Time Exceeded
Counter
ICMP Fragment Reassembly Time Exceeded events are counted in the All ICMP
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 Fragment Reassembly Time Exceeded events are automatically logged as
expert symptoms. The
Symptom Summary
field provides information about the IP
addresses involved. For example:
Sent by Destination Host [206.250.228.69] to
[206.250.228.11]. SA=[206.250.228.11] DA=[206.250.228.69]
Diagnostic Details
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Problem Description:
An ICMP Fragment Reassembly Time Exceeded message has been sent.
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Probable Cause(s):
1. A host may send this message if it cannot reassemble the fragments (due to
missing fragments) on time.
2. There may be a lot of missing IP fragments (possibly due to NFS traffic or
network overload).
3. The routing tables may be incorrect on the source.
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Recommended Action(s):
1. Check the routing tables of the source.
2. Check the netmask configuration of the source.
3. Check for missing IP fragments.
4. May need to upgrade the host that sent this message.