Debug ip icmp
debug ip icmp
This command displays information about Internal Control Message Protocol (ICMP) transactions and allows you to monitor the ICMP messages sent and received by your router. Each ICMP message has a source, destination, type, and code number. RFC-792 provides complete coverage of the fields in debug ip icmp output. Example 5-8 is a debug ip icmp output sample that shows a case with five echo replies received, and a case with three host unreachable messages received.
Example 5-8 debug ip icmp Command Output
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A_StubR#debug ip icmp |
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ICMP packet debugging is on |
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A_StubR#ping 131.1.18.1 |
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Type escape sequence to abort. |
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Sending 5, 100-byte ICMP Echos to !!!!! |
131.1.18.1, |
timeout is 2 seconds: |
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Success rate is 100 percent (5/5), |
round-trip |
min/avg/max = 4/5/8 ms |
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A_StubR# |
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ICMP: echo reply rcvd, src 131.1.1 |
8.1, dst 131 |
.1.18.14 |
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ICMP: echo reply rcvd, src 131.1.1 |
8.1, dst 131 |
.1.18.14 |
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ICMP |
echo reply rcvd, |
src 131.1.18 |
1, |
dst 131.1.18.14 |
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ICMP |
echo reply rcvd, |
src 131.1.18 |
1, |
dst 131.1.18.14 |
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ICMP |
echo reply rcvd, |
src 131.1.18 |
1, |
dst 131.1.18.14 |
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A_StubR#ping 10.1.1.1 |
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Type |
escape sequence to |
abort. |
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Sending 5, 100-byte ICMP Echos to 1 |
3.1 |
.1 |
1, timeout is 2 |
seconds: |
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U.U.U |
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Success rate is 0 percent (0/5) |
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ICMP |
dst (131.1.18.14) |
host unreachable |
rcv from 131.1.1 |
8.1 |
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ICMP |
dst (131.1.18.14) |
host unreachable |
rcv from 131.1.1 |
8.1 |
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ICMP |
dst (131.1.18.14) |
host unreachable |
rcv from 131.1.1 |
8.1 |
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A_StubR# |
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Continue reading here: Debug ip rip
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