UMN:CLI User ManualV81022307.15.2 Interval for Transmit ICMP MessageUser can configure the interval for transmit ICMP message. After you configure the inter-val, ICMP message will be blocked until the configured time based on the last message isup. For example, if you configure the interval as 1 second, ICMP will not be sent within 1second after the last message has been sent.To configure interval to transmit ICMP message, the administrator should configure thetype of message and the interval time.Use the following command, to configure the interval for transmit ICMP message.Command Mode Descriptionip icmp interval rate-mask MASK GlobalConfigures the interval for transmit ICMP message.MASK: user should input hexadecimal value until0xFFFFFFFF. The default is 0x1818.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” match-es 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”. In1000, 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 is1100000011000. 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 asthe message limiting the transmission rate.The table shows the result of mask calculation of default value.Type StatusICMP_ECHOREPLY (0) OFFICMP_DEST_UNREACH (3) ONICMP_SOURCE_QUENCH (4) ONICMP_REDIRECT (5) OFFICMP_ECHO (8) OFFICMP_TIME_EXCEEDED (11) ONICMP_PARAMETERPROB (12) ONICMP_TIMESTAMP (13) OFFICMP_TIMESTAMPREPLY (14) OFFICMP_INFO_REQUEST (15) OFFICMP_INFO_REPLY (16) OFFICMP_ADDRESS (17) OFFICMP_ADDRESSREPLY (18) OFFTab. 7.3 Mask Calculation of Default Value
