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|
ICMP | |||||||||||||||||||||||||||||||
| Bit Number |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 1 0 | 1 1 | 1 2 | 1 3 | 1 4 | 1 5 | 1 6 | 1 7 | 1 8 | 1 9 | 2 0 | 2 1 | 2 2 | 2 3 | 2 4 | 2 5 | 2 6 | 2 7 | 2 8 | 2 9 | 3 0 | 3 1 |
| Type | Code | Checksum | |||||||||||||||||||||||||||||
| Other message-specific information... | |||||||||||||||||||||||||||||||
| Type Name/Codes (Code=0 unless otherwise specified |
| 0 | Echo Reply | ||
| 3 | Destination Unreachable | ||
| 0 | Net Unreachable | ||
| 1 | Host Unreachable | ||
| 2 | Protocol Unreachable | ||
| 3 | Port Unreachable | ||
| 4 | Fragmentation Needed & DF Set | ||
| 5 | Source Route Failed | ||
| 6 | Destination Network Unknown | ||
| 7 | Destination Host Unknown | ||
| 8 | Source Host Isolated | ||
| 9 | Network Administratively Prohibited | ||
| 10 | Host Administratively Prohibited | ||
| 11 | Network Unreachable for TOS | ||
| 12 | Host Unreachable for TOS | ||
| 13 | Communication Administratively Prohibited | ||
| 4 | Source Quench | ||
| 5 | Redirect | ||
| 0 | Redirect Datagram for the Network | ||
| 1 | Redirect Datagram for the Host | ||
| 2 | Redirect Datagram for the TOS & Network | ||
| 3 | Redirect Datagram for the TOS & Host | ||
| 8 | Echo | ||
| 9 | Router Advertisement | ||
| 10 | Router Selection | ||
| 11 | Time Exceeded | ||
| 0 | Time to Live exceeded in Transit | ||
| 1 | Fragment Reassembly Time Exceeded | ||
| 12 | Parameter Problem | ||
| 0 | Pointer indicates the error | ||
| 1 | Missing a Required Option | ||
| 2 | Bad Length | ||
| 13 | Timestamp | ||
| 14 | Timestamp Reply | ||
| 15 | Information Request | ||
| 16 | Information Reply | ||
| 17 | Address Mask Request | ||
| 18 | Address Mask Reply | ||
| 30 | Traceroute | ||