D-Link DFL-1100 Product Manual - Page 123

Appendixes

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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 Code Description Reference 0 Echo Reply 0 No Code RFC792 3 Destination Unreachable 0 Net Unreachable RFC792 1 Host Unreachable RFC792 2 Protocol Unreachable RFC792 3 Port Unreachable RFC792 4 Fragmentation Needed and RFC792 Don't Fragment was Set 5 Source Route Failed RFC792 6 Destination Network Unknown RFC792 7 Destination Host Unknown RFC792 8 Source Host Isolated RFC792 9 Communication with RFC792 Destination Network is Administratively Prohibited 10 Communication with RFC792 Destination Host is Administratively Prohibited 11 Destination Network RFC792 Unreachable for Type of Service 12 Destination Host Unreachable RFC792 for Type of Service 4 Source Quench 5 Redirect 13 Communication Administratively Prohibited RFC1812 14 Host Precedence Violation RFC1812 15 Precedence cutoff in effect RFC1812 0 No Code RFC792 0 Redirect Datagram for the RFC792 Network (or subnet)

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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
Code
Description
Reference
0
Echo Reply
0
No Code
RFC792
3
Destination Unreachable
0
Net Unreachable
RFC792
1
Host Unreachable
RFC792
2
Protocol Unreachable
RFC792
3
Port Unreachable
RFC792
4
Fragmentation Needed and
Don't Fragment was Set
RFC792
5
Source Route Failed
RFC792
6
Destination Network Unknown
RFC792
7
Destination Host Unknown
RFC792
8
Source Host Isolated
RFC792
9
Communication
with
Destination
Network
is
Administratively Prohibited
RFC792
10
Communication
with
Destination
Host
is
Administratively Prohibited
RFC792
11
Destination
Network
Unreachable
for
Type
of
Service
RFC792
12
Destination Host Unreachable
for Type of Service
RFC792
13
Communication
Administratively Prohibited
RFC1812
14
Host Precedence Violation
RFC1812
15
Precedence cutoff in effect
RFC1812
4
Source Quench
0
No Code
RFC792
5
Redirect
0
Redirect Datagram for the
Network (or subnet)
RFC792