1.2.4.2.2 Internet Control Message Protocol (ICMP) Configurations

ICMP Specific User Configurations

• Use ICMPv4 Server:

  • Build with the ICMP server support

  • Default value: true

  • Symbol TCPIP_STACK_USE_ICMP_SERVER

• Allow Replies to Echo Broadcast Requests:

  • Allow replies to echo requests sent to a broadcast address

  • By default this should be disabled, to prevent broadcast flood attacks

  • Note that this could be a security issue

  • Default value: false

  • Symbol TCPIP_ICMP_ECHO_BROADCASTS, TCPIP_ICMP_ECHO_ALLOW_BROADCASTS

• Use ICMPv4 Client:

  • Build with the ICMP client support

  • Default value: false

  • Symbol TCPIP_STACK_USE_ICMP_CLIENT

• ICMP Task Rate (in msec):

  • ICMP task processing rate, in milliseconds.

  • The ICMP module will process a timer event with this rate for maintaining its own queues, processing timeouts, etc.

  • The lower the rate (higher the frequency) the higher the module priority and higher module performance can be obtained

  • The value cannot be lower than the TCPIP_STACK_TICK_RATE.

  • Default value: 33

  • Symbol TCPIP_ICMP_TASK_TICK_RATE

• Maximum Number of Supported Client Requests:

  • Maximum number of parallel outgoing ICMP echo requests supported at one time

  • Default value: 4

  • Symbol TCPIP_STACK_MAX_CLIENT_ECHO_REQUESTS

• Echo request timeout (in msec):

  • ICMP timeout for a request that was sent and no reply was received

  • Value is in milliseconds

  • Default value: 500

  • Symbol TCPIP_ICMP_ECHO_REQUEST_TIMEOUT

• Enable Console Commands:

  • Enable the ICMP TCP/IP Console ping commands

  • Default value: false

  • Symbol: TCPIP_ICMP_COMMAND_ENABLE

• Number of ICMP Echo requests:

  • The console ping command number of Echo requests to send

  • Default value: 4

  • Symbol TCPIP_STACK_COMMANDS_ICMP_ECHO_REQUESTS

• ICMP Request Delay (in msec):

  • The console ping command delay between between 2 echo requests

  • Default value: 1000

  • Symbol TCPIP_STACK_COMMANDS_ICMP_ECHO_REQUEST_DELAY

• ICMP Give Up Time-out (in msec):

  • The console ping command time out

  • If no reply received after this time, the command will give up

  • Default value: 5000

  • Symbol TCPIP_STACK_COMMANDS_ICMP_ECHO_TIMEOUT

• Echo Request Data Buffer size - bytes:

  • The console ping command data buffer size

  • Default value: 2000

  • Symbol TCPIP_STACK_COMMANDS_ICMP_ECHO_REQUEST_BUFF_SIZE

• Echo request Default Data Size - bytes:

  • The console ping command default echo request size

  • Default value: 100

  • Symbol TCPIP_STACK_COMMANDS_ICMP_ECHO_REQUEST_DATA_SIZE