TYPE CODE MEANING
0 0 ECHO REPLY (ping reply)
3 DESTINATION UNREACHABLE
0 network unreachable
1 host unreachable
2 protocol unreachable
3 port unreachable
4 frag needed
5 source route failed
6 destination network unknown
7 destination host unknown
8 source host isolated
9 destination network administratively prohibited
10 destination host administratively prohibited
11 network unreachable for TOS
12 host unreachable for TOS
13 prohibited by filtering
14 host precedence violation
15 precedence cutoff
4 0 SOURCE QUENCH
5 REDIRECT
0 network
1 host
2 network & TOS
3 host & TOS
8 0 ECHO REQUEST (ping request)
9 0 ROUTER ADVERTISEMENT
10 0 ROUTER SOLICITATION
11 TIME EXCEEDED
0 TTL=0 during transmit
1 TTL=0 during reassembly
12 PARAMETER PROBLEM
13 0 TIMESTAMP REQUEST
14 0 TIMESTAMP REPLY
15 0 INFO REQUEST
16 0 INFO REPLY
17 0 ADDRESS MASK REQUEST
18 0 ADDRESS MASK REPLY
Summary of ICMP message types:-
|
0 |
Echo reply |
|
3 |
Destination unreachable |
|
4 |
Source quench |
|
5 |
Redirect |
|
8 |
Echo |
|
11 |
Time exceeded |
|
12 |
Parameter problem |
|
13 |
Time stamp |
|
14 |
Time stamp reply |
|
15 |
Information request |
|
16 |
Information reply |
|
