Command:

debug ip icmp


Mode:

Router#


Syntax:

debug ip icmp

no debug ip icmp

 

Syntax Description:

This command has no arguments or keywords.

 

Command Description:

To display information on Internal Control Message Protocol (ICMP) transactions, use the debug ip icmp privileged EXEC command. The no form of this command disables debugging output.

This command helps you determine whether the router is sending or receiving ICMP messages. Use it, for example, when you are troubleshooting an end-to-end connection problem.


Example:

The following is sample output from the debug ip icmp command:

Router# debug ip icmp
ICMP: rcvd type 3, code 1, from 10.95.192.4
ICMP: src 10.56.0.202, dst 172.69.16.1, echo reply
ICMP: dst (10.120.1.0) port unreachable rcv from 10.120.1.15
ICMP: src 172.69.12.35, dst 172.69.20.7, echo reply
ICMP: dst (255.255.255.255) protocol unreachable rcv from 10.31.7.21
ICMP: dst (10.120.1.0) port unreachable rcv from 10.120.1.15
ICMP: dst (255.255.255.255) protocol unreachable rcv from 10.31.7.21
ICMP: dst (10.120.1.0) port unreachable rcv from 10.120.1.15
ICMP: src 10.56.0.202, dst 172.69.16.1, echo reply
ICMP: dst (10.120.1.0) port unreachable rcv from 10.120.1.15
ICMP: dst (255.255.255.255) protocol unreachable rcv from 10.31.7.21
ICMP: dst (10.120.1.0) port unreachable rcv from 10.120.1.15


Misconceptions:

None.


Related Commands:

None.


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