Cisco Catalyst 2000 Configuration Handbook page 303

282 Cisco LAN Switching Configuration Handbook
Table B-2 shows the assigned ICMP type numbers, ICMP codes (where applicable), a
brief description, and a reference to an RFC.
Table B-2 Assigned ICMP Type Numbers, Codes, Descriptions, and Associated RFCs
Type Code
0
1
2
3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
4
5
0
1
2
3
6
Name
Echo Reply
Unassigned
Unassigned
Destination Unreachable
Net Unreachable
Host Unreachable
Protocol Unreachable
Port Unreachable
Fragmentation Needed and Don't Fragment Was Set
Source Route Failed
Destination Network Unknown
Destination Host Unknown
Source Host Isolated
Destination Network Is Administratively Prohibited
Destination Host Is Administratively Prohibited
Destination Network Unreachable for Type of Service
Destination Host Unreachable for Type of Service
Communication Administratively Prohibited
Host Precedence Violation
Precedence Cutoff in Effect
Source Quench
Redirect
Redirect Datagram for the Network (or Subnet)
Redirect Datagram for the Host
Redirect Datagram for the Type of Service and Network
Redirect Datagram for the Type of Service and Host
Alternate Host Address
Reference
RFC 792
RFC 792
RFC 1812
RFC 1812
RFC 1812
RFC 792
RFC 792