UMN:CLI
User Manual
V5824G
198
If mask that is input as hexadecimal number is calculated as binary number
“1” means
“Status ON”, “0” means “Status OFF”. In binary number, if the digit showed as “1”
matches with the value of ICMP message. It means
ICMP Message is selected as “Status
ON”. Digit value starts from 0.
For example, if hexadecimal number “8” is changed as binary number, it is “1000”. In
1000, 0 digit is “0” and 1 digit is “0”, 2 digit is “0” and 3 digit is “1”. The digit showed as “1”
is
“3” and ICMP_DEST_UNREACH means ICMP value is “3”. Therefore,
ICMP_DEST_UNREACH is chosen the message of limiting the transmission time.
Default is 0x1818. If 1818 as hexadecimal number is changed as binary number, it is
1100000011000. By calculating from 0 digit, 3 digit, 4 digit, 11 digit, 12 digit is
“1” and it is
“STATUS ON”. Therefore, the message that corresponds to 3, 4, 11, and 12 is chosen as
the message limiting the transmission rate.
shows the result of mask calculation of default value.
Type
Status
ICMP_ECHOREPLY (0)
OFF
ICMP_DEST_UNREACH (3)
ON
ICMP_SOURCE_QUENCH (4)
ON
ICMP_REDIRECT (5)
OFF
ICMP_ECHO (8)
OFF
ICMP_TIME_EXCEEDED (11)
ON
ICMP_PARAMETERPROB (12)
ON
ICMP_TIMESTAMP (13)
OFF
ICMP_TIMESTAMPREPLY (14)
OFF
ICMP_INFO_REQUEST (15)
OFF
ICMP_INFO_REPLY (16)
OFF
ICMP_ADDRESS (17)
OFF
ICMP_ADDRESSREPLY (18)
OFF
Tab. 7.3
Mask Calculation of Default Value
To configure the limited ICMP transmission time, use the following command.
Command
Mode
Description
ip
icmp
interval
rate-limit
INTERVAL
Global
Configures a limited ICMP transmission time.
INTERVAL: 0-2000000000 (unit: 10 ms)
The default ICMP interval is 1 second (100 ms).
To return to default ICMP configuration, use the following command.
Command
Mode
Description
ip icmp interval default
Global
Returns to default configuration.
i
