C. Router CLI Commands, Codes, and Designations

Protocol and Port Designations

The following tables are used for filtering.

ICMP Designations

Use the Internet Control Management Protocol (ICMP) designations in Table C-15, ICMP Designations, when specifying a specific ICMP message to be filtered.

Table C-15. ICMP Designations (1 of 2)

Type

Code

ICMP Message

Description

 

 

 

 

0

0

echo-reply

Echo (ping) reply

 

 

 

 

All 3n = Destination unreachable

 

 

 

 

 

3

0

net-unreachable

Network unreachable

 

 

 

 

3

1

host-unreachable

Host unreachable

 

 

 

 

3

2

protocol-unreachable

Protocol unreachable

 

 

 

 

3

3

port-unreachable

Port unreachable

 

 

 

 

3

4

packet-too-big

Fragmentation needed and do not

 

 

 

fragment (DF) bit set

 

 

 

 

3

5

source-route-failed

Source route failed

 

 

 

 

3

6

network-unknown

Destination network unknown

 

 

 

 

3

7

host-unknown

Destination host unknown

 

 

 

 

3

8

host-isolated

Source host isolated

 

 

 

 

3

9

dod-net-prohibited

Destination network admin prohibited

 

 

 

 

3

10

dod-host-prohibited

Destination host admin prohibited

 

 

 

 

3

11

net-tos-unreachable

Network unreachable for TOS (Type

 

 

 

of Service)

 

 

 

 

3

12

host-tos-unreachable

Host unreachable for TOS

 

 

 

 

3

13

Administratively-prohibited

Communication admin. prohibited by

 

 

 

filtering

 

 

 

 

3

14

host-precedence-unreachable

Host precedence violation

 

 

 

 

3

15

precedence-unreachable

Precedence cutoff in effect

 

 

 

 

4

0

source-quench

Source quench (flow control)

 

 

 

 

9128-A2-GB20-80

September 2002

C-31

Page 413
Image 413
Paradyne 9126-II, CSU, DSU, 9128-II Protocol and Port Designations, Icmp Designations, All 3 n = Destination unreachable