Appendixes; Appendix A: Icmp Types And Codes - D-Link DFL-1100 User Manual

Appendixes

Appendix A: ICMP Types and Codes

The Internet Control Message Protocol (ICMP) has many messages that are identified by
a "type" field; many of these ICMP types have a "code" field. Here we list the types with their
assigned code fields.
Type Name
0 Echo Reply
3 Destination Unreachable
4 Source Quench
5 Redirect
Code Description
0 No Code
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
7 Destination Host Unknown
8 Source Host Isolated
9 Communication
Destination
Administratively Prohibited
10 Communication
Destination
Administratively Prohibited
11 Destination
Unreachable
Service
12 Destination Host Unreachable
for Type of Service
13 Communication
Administratively Prohibited
14 Host Precedence Violation
15 Precedence cutoff in effect
0 No Code
0 Redirect Datagram for the
Network (or subnet)
Reference
RFC792
RFC792
RFC792
RFC792
RFC792
RFC792
RFC792
RFC792
RFC792
RFC792
with RFC792
Network is
with RFC792
Host is
Network RFC792
for Type of
RFC792
RFC1812
RFC1812
RFC1812
RFC792
RFC792