OmniSwitch os6900 Network Configuration Manual page 364

Managing IP
Activating ICMP Control Messages
ICMP messages are identified by a type and a code. This number pair specifies an ICMP message. For
example, ICMP type 4, code 0, specifies the source quench ICMP message.
To enable or disable an ICMP message, use the
example, to enable the source quench the ICMP message (type 4, code 0) enter the following:
-> icmp type 4 code 0 enable
To list the ICMP message information use the show icmp control command.
In addition to the icmp type
commands for convenience. The following table lists 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 15, "IP Commands,"
page 15-30
icmp type
command, many commonly used ICMP messages have 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.
OmniSwitch AOS Release 7 Network Configuration Guide
command with the type and code. For
Configuring IP
June 2013