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Issue 5 October 2007
293
Appendix C: ICMP Packet Types & Codes
This appendix lists the various ICMP Packet Types and Codes as used in
Note:
Note:
Some ICMP Packet Types have no corresponding Code.
ICMP Packet Type/Code List
Table 120: ICMP Packet Types/Codes
Description
ICMP Type
ICMP Code
Echo Reply
0
0
Unreachable
3
--
Network Unreachable
3
--
Host Unreachable
3
1
Protocol Unreachable
3
2
Port Unreachable
3
3
Fragmentation Needed but DF Bit Set
3
4
Source Route Failed
3
5
Destination Network Unknown
3
6
Destination Host Unknown
3
7
Destination Network Administratively Prohibited
3
9
Network Unreachable for TOS
3
11
Host Unreachable for TOS
3
12
Communication Administratively Prohibited by Filtering
3
13
Host Precedence Violation
3
14
Precedence Cutoff in Effect
3
15
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