Alcatel-Lucent OmniSwitch 6800 Series Network Configuration Manual page 368

Managing IP
ICMP Message
address mask reply
In addition to the icmp type
commands for convenience. These commands are listed below with the ICMP message name, type, and
code:
ICMP Message
Network unreachable (type 0, code 3)
Host unreachable (type 3, code 1)
Protocol unreachable (type 3, code 2)
Port unreachable (type 3, code 3)
Echo reply (type 0, code 0)
Echo request (type 8, code 0)
Timestamp request (type 13, code 0)
Timestamp reply (type 14, code 0)
Address Mask request (type 17, code 0)
Address Mask reply (type 18, code 0)
These commands are entered as the
echo, timestamp, and address mask commands have options for distinguishing between a request or a
reply, and the unreachable command has options distinguishing between a network, host, protocol, or port.
For example, to enable an echo request message, enter the following:
-> icmp echo request enable
To enable a network unreachable message, enter the following:
-> icmp unreachable net-unreachable enable
Note. Enabling host-unreachable and net-unreachable messages are not recommended as it can cause
the switch instability due to high-CPU conditions depending upon the volume of traffic required by these
messages.
See Chapter 25, "IP Commands,"
Enabling All ICMP Types
To enable all ICMP message types, use the
For example:
-> icmp messages enable
To disable all ICMP messages, enter the same command with the disable keyword. For example:
-> icmp messages enable
page 18-30
Type
18
command, several commonly used ICMP messages have been separate CLI
Command
icmp unreachable
icmp unreachable
icmp unreachable
icmp unreachable
icmp echo
icmp echo
icmp timestamp
icmp timestamp
icmp addr-mask
icmp addr-mask
icmp type command, only without specifying a type or code. The
for specifics on the ICMP message commands.
icmp messages
OmniSwitch 6800/6850/9000 Network Configuration Guide
Code
0
command with the enable keyword.
Configuring IP
March 2008