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页码 454
10-63
Expert Features
Network Layer
10
ICMP Bad IP Header
Counter
ICMP Bad IP Header 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 Bad IP Header 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].
Bad Octet at 14. SA=[206.250.228.11]
DA=[206.250.228.69]
Sent by Gateway [206.250.228.61] to [206.250.228.11] when
forwarding to Destination [206.250.228.69].
Bad Octet at
14. SA=[206.250.228.11] DA=[206.250.228.69]
Diagnostic Details
__________________________________________________________________ 
Problem Description: 
An ICMP Parameter Problem (IP header is bad) message has been sent. 
__________________________________________________________________ 
Probable Cause(s):
1. A host/router may send this message if the IP header parameters have 
problems that prevent it from processing the packet. 
2. A host/router may have a bad network stack or a bad interface card. 
3. There may be incorrect arguments in IP options. 
__________________________________________________________________ 
Recommended Action(s):
1. Check the 
ICMP Pointer
 field to see the octet in the IP header where the error 
was detected.
2. Verify that the source that sent this IP header has a good network interface 
card.
3. Verify that the network stack on the source that sent the bad IP header 
parameters is working properly.