ICMP Types and Codes
| Type Number | Type Name | Optional Code(s) |
|
0 |
Echo Reply |
|
|
1 |
Unassigned |
|
|
2 |
Unassigned |
Type Number Type Name Optional Code(s)
0 Net Unreachable
1 Host Unreachable
2 Protocol Unreachable
3 Port Unreachable
4 Fragmentation Needed and Don’t Fragment was Set
5 Source Route Failed
6 Destination Network Unknown
3 Destination
Unreachable
7 Destination Host Unknown
8 Source Host Isolated
9 Communication with Destination Network is Administratively
Prohibited
10 Communication with Destination Host is Administratively Pro- hibited
11 Destination Network Unreachable for Type of Service
12 Destination Host Unreachable for Type of Service
13 Communication Administratively Prohibited
14 Host Precedence Violation
15 Precedence cutoff in effect
4 Source Quench
0 Redirect Datagram for the Network (or subnet)
5 Redirect
1 Redirect Datagram for the Host
2 Redirect Datagram for the Type of Service and Network
3 Redirect Datagram for the Type of Service and Host
6 Alternate Host
Address
7 Unassigned
| Type Number | Type Name | Optional Code(s) |
|
8 |
Echo |
|
|
9 |
Router Advert- isement |
|
|
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 |
Timestand Reply |
|
|
15 |
Information Request |
|
|
16 |
Information Reply |
|
|
17 |
Address Mask Request |
|
|
18 |
Address Mask Reply |
|
|
19 |
Reserved (for Security) |
|
|
20 – 29 |
Reserved (for Robustness Exper- iment) |
|
|
30 |
Traceroute |
|
|
31 |
Datagram Con- version Error |
|
|
32 |
Mobile Host Redir- ect |
| Type Number | Type Name | Optional Code(s) |
|
33 |
IPv6 Where-Are- You |
|
|
34 |
IPv6 I-Am-Here |
|
|
35 |
Mobile Registration |
|
|
36 |
Mobile Registration Reply |
|
|
37 |
Domain Name Request |
|
|
38 |
Domain Name Reply |
|
|
39 |
SKIP |
|
|
40 |
Photuris |
|
|
41 – 255 |
Reserved |