User Manual
UMN:CLI
V8102
229
The following figure shows simple ICMP message structure.
0 7 15 16 31
8-bit Type
8-bit Code
16-bit Checksum
(Contents Depend on Type and Code)
Fig. 7.9
ICMP Message Structure
It is possible to control ICMP message through user
’s configuration. You can configure to
block the echo reply message to the partner who is doing ping test to device and interval
to transmit ICMP message.
7.15.1
Blocking Echo/Bogus Reply Message
It is possible to configure block echo reply message to the partner who is doing ping test
to switch. To block echo reply message, use the following command.
Command
Mode
Description
ip icmp ignore echo all
Global
Blocks echo reply message to all partners who are
taking ping test to device.
ip icmp ignore echo broadcast
Blocks echo reply message to partner who is taking
broadcast ping test to device.
To release the blocked echo reply message, use the following command.
Command
Mode
Description
no ip icmp ignore echo all
Global
Releases blocked echo reply message to all partners
who are taking ping test to device.
no ip icmp ignore echo broad-
cast
Releases blocked echo reply message to partner who
is taking broadcast ping test to device.
To block the ICMP bogus packets, use the following command.
Command
Mode
Description
ip icmp ignore bogus error re-
sponses
Global
Blocks the ICMP bogus packets.
no ip icmp ignore bogus error
responses
Releases blocked ICMP bogus packets.
