.. _icmp_messages_full:

=============
ICMP Messages
=============

This appendix table describes the association between ICMP type/code
couples and ICMP messages.

+-------------+-------------+-------------------------------------------------------------------------+
| ICMP Type   | ICMP Code   | ICMP Message                                                            |
+=============+=============+=========================================================================+
| 0           | 0           | Echo Reply                                                              |
+-------------+-------------+-------------------------------------------------------------------------+
| 3           | | 0         | | Network 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                                           |
|             | | 7         | | Destination Host Unknown                                              |
|             | | 8         | | Source Host Isolated                                                  |
|             | | 9         | | Communication with Destination Network is Administratively Prohibited |
|             | | 10        | | Communication with Destination Host is Administratively Prohibited    |
|             | | 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           | 0           | Source Quench                                                           |
+-------------+-------------+-------------------------------------------------------------------------+
| 5           | | 0         | | Redirect Datagram for the Network (or subnet)                         |
|             | | 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           | 0           | Alternate Address for Host                                              |
+-------------+-------------+-------------------------------------------------------------------------+
| 8           | 0           | Echo                                                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 9           | | 0         | | Normal router advertisement                                           |
|             | | 16        | | Does not route common traffic                                         |
+-------------+-------------+-------------------------------------------------------------------------+
| 10          | 0           | Router Selection                                                        |
+-------------+-------------+-------------------------------------------------------------------------+
| 11          | | 0         | | Time to Live exceeded in Transit                                      |
|             | | 1         | | Fragment Reassembly Time Exceeded                                     |
+-------------+-------------+-------------------------------------------------------------------------+
| 12          | | 0         | | Pointer indicates the error                                           |
|             | | 1         | | Missing a Required Option                                             |
|             | | 2         | | Bad Length                                                            |
+-------------+-------------+-------------------------------------------------------------------------+
| 13          | 0           | Timestamp                                                               |
+-------------+-------------+-------------------------------------------------------------------------+
| 14          | 0           | Timestamp Reply                                                         |
+-------------+-------------+-------------------------------------------------------------------------+
| 15          | 0           | Information Request                                                     |
+-------------+-------------+-------------------------------------------------------------------------+
| 16          | 0           | Information Reply                                                       |
+-------------+-------------+-------------------------------------------------------------------------+
| 17          | 0           | Address Mask Request                                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 18          | 0           | Address Mask Reply                                                      |
+-------------+-------------+-------------------------------------------------------------------------+
| 19          | 0           | Reserved (for Security)                                                 |
+-------------+-------------+-------------------------------------------------------------------------+
| 20          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 21          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 22          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 23          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 24          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 25          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 26          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 27          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 28          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 29          | 0           | Reserved (for Robustness Experiment)                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 30          | 0           | Traceroute                                                              |
+-------------+-------------+-------------------------------------------------------------------------+
| 31          | 0           | Datagram Conversion Error                                               |
+-------------+-------------+-------------------------------------------------------------------------+
| 32          | 0           | Mobile Host Redirect                                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 33          | 0           | IPv6 Where-Are-You                                                      |
+-------------+-------------+-------------------------------------------------------------------------+
| 34          | 0           | IPv6 I-Am-Here                                                          |
+-------------+-------------+-------------------------------------------------------------------------+
| 35          | 0           | Mobile Registration Request                                             |
+-------------+-------------+-------------------------------------------------------------------------+
| 36          | 0           | Mobile Registration Reply                                               |
+-------------+-------------+-------------------------------------------------------------------------+
| 39          | 0           | SKIP                                                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 40          | | 0         | | Bad SPI                                                               |
|             | | 1         | | Authentication Failed                                                 |
|             | | 2         | | Decompression Failed                                                  |
|             | | 3         | | Decryption Failed                                                     |
|             | | 4         | | Need Authentication                                                   |
|             | | 5         | | Need Authorization                                                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 128         | 0           | IPv6 Echo Request                                                       |
+-------------+-------------+-------------------------------------------------------------------------+
| 129         | 0           | IPv6 Echo Reply                                                         |
+-------------+-------------+-------------------------------------------------------------------------+
| 130         | 0           | IPv6 Multicast Listener Query                                           |
+-------------+-------------+-------------------------------------------------------------------------+
| 131         | 0           | IPv6 Multicast Listener Report                                          |
+-------------+-------------+-------------------------------------------------------------------------+
| 132         | 0           | IPv6 Multicast Listener Done                                            |
+-------------+-------------+-------------------------------------------------------------------------+
| 133         | 0           | IPv6 Router Solicitation                                                |
+-------------+-------------+-------------------------------------------------------------------------+
| 134         | 0           | IPv6 Router Advertisement                                               |
+-------------+-------------+-------------------------------------------------------------------------+
| 135         | 0           | IPv6 Neighbor Solicitation                                              |
+-------------+-------------+-------------------------------------------------------------------------+
| 136         | 0           | IPv6 Neighbor Advertisement                                             |
+-------------+-------------+-------------------------------------------------------------------------+
| 137         | 0           | IPv6 Redirect Message                                                   |
+-------------+-------------+-------------------------------------------------------------------------+
| 138         | | 0         | | Command                                                               |
|             | | 1         | | Result                                                                |
|             | | 255       | | Reset                                                                 |
+-------------+-------------+-------------------------------------------------------------------------+
| 139         | | 0         | | Subject                                                               |
|             | | 1         | | Subject or Empty                                                      |
|             | | 2         | | Ipv4 Subject                                                          |
+-------------+-------------+-------------------------------------------------------------------------+
| 140         | | 0         | | Successful                                                            |
|             | | 1         | | Refused                                                               |
|             | | 2         | | Unknown                                                               |
+-------------+-------------+-------------------------------------------------------------------------+
| 141         | 0           | IPv6 Inverse Neighbor Discovery Solicitation Message                    |
+-------------+-------------+-------------------------------------------------------------------------+
| 142         | 0           | IPv6 Inverse Neighbor Discovery Advertisement Message                   |
+-------------+-------------+-------------------------------------------------------------------------+
| 144         | 0           | IPv6 Home Agent Address Discovery Request Message                       |
+-------------+-------------+-------------------------------------------------------------------------+
| 145         | 0           | IPv6 Home Agent Address Discovery Reply Message                         |
+-------------+-------------+-------------------------------------------------------------------------+
| 146         | 0           | IPv6 Mobile Prefix Solicitation                                         |
+-------------+-------------+-------------------------------------------------------------------------+
| 147         | 0           | IPv6 Mobile Prefix Advertisement                                        |
+-------------+-------------+-------------------------------------------------------------------------+
| 148         | 0           | IPv6 Certification Path Solicitation Message                            |
+-------------+-------------+-------------------------------------------------------------------------+
| 149         | 0           | IPv6 Certification Path Advertisement Message                           |
+-------------+-------------+-------------------------------------------------------------------------+
| 151         | 0           | IPv6 Multicast Router Advertisement                                     |
+-------------+-------------+-------------------------------------------------------------------------+
| 152         | 0           | IPv6 Multicast Router Solicitation                                      |
+-------------+-------------+-------------------------------------------------------------------------+
| 153         | 0           | IPv6 Multicast Router Termination                                       |
+-------------+-------------+-------------------------------------------------------------------------+
| 154         | 0           | FMIPv6 Messages                                                         |
+-------------+-------------+-------------------------------------------------------------------------+
| 253         | 0           | RFC3692-style Experiment 1                                              |
+-------------+-------------+-------------------------------------------------------------------------+
| 254         | 0           | RFC3692-style Experiment 2                                              |
+-------------+-------------+-------------------------------------------------------------------------+