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# 1.2.4.7.2 Neighbor Discovery Protocol (NDP) Configurations

NDP Specific User Configurations

- NDP Task Rate (in msec):

  - NDP task processing rate, in milliseconds.
  - The NDP 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.
  - Value is in milliseconds
  - Default value: 32
  - Symbol TCPIP_NDP_TASK_TIMER_RATE, TCPIP_IPV6_NDP_TASK_TIMER_RATE

- RTR Solicitation Delay (in sec):

  - Router Solicitation Delay
  - Value is in seconds
  - Default value: 1
  - Symbol TCPIP_MAX_RTR_SOLICITATION_DELAY, TCPIP_IPV6_NDP_MAX_RTR_SOLICITATION_DELAY

- RTR Solicitation Interval (in sec):

  - Router Solicitation Interval
  - Value is in seconds
  - Default value: 4
  - Symbol TCPIP_RTR_SOLICITATION_INTERVAL, TCPIP_IPV6_NDP_RTR_SOLICITATION_INTERVAL

- Maximum RTR Solicitations:

  - Maximum number of router solicitations
  - Default value: 3
  - Symbol TCPIP_MAX_RTR_SOLICITATIONS, TCPIP_IPV6_NDP_MAX_RTR_SOLICITATIONS

- Maximum Multicast Solicitations:

  - Maximum number of multicast solicitations
  - Default value: 3
  - Symbol TCPIP_MAX_MULTICAST_SOLICIT, TCPIP_IPV6_NDP_MAX_MULTICAST_SOLICIT

- Maximum Unicast Solicitations:

  - Maximum number of unicast solicitations
  - Default value: 3
  - Symbol TCPIP_MAX_UNICAST_SOLICIT, TCPIP_IPV6_NDP_MAX_UNICAST_SOLICIT

- Maximum Anycast Delay Time (in sec):

  - Maximum anycast delay time
  - Value is in seconds
  - Default value: 1
  - Symbol TCPIP_MAX_ANYCAST_DELAY_TIME, TCPIP_IPV6_NDP_MAX_ANYCAST_DELAY_TIME

- Maximum Neighbor Advertisement Transmissions:

  - Maximum number of neighbor advertisement transmissions
  - Default value: 3
  - Symbol TCPIP_MAX_NEIGHBOR_ADVERTISEMENT, TCPIP_IPV6_NDP_MAX_NEIGHBOR_ADVERTISEMENT

- Reachable Time (in sec):

  - Value for the reachable time
  - Value is in seconds
  - Default value: 30
  - Symbol TCPIP_REACHABLE_TIME, TCPIP_IPV6_NDP_REACHABLE_TIME

- Re-transmission Timer (in sec):

  - Value of the retransmission timer
  - Value is in seconds
  - Default value: 1
  - Symbol TCPIP_RETRANS_TIMER, TCPIP_IPV6_NDP_RETRANS_TIMER

- Delay First Probe Time (in sec):

  - Value of the delay for the first probe
  - Value is in seconds
  - Default value: 5
  - Symbol TCPIP_DELAY_FIRST_PROBE_TIME, TCPIP_IPV6_NDP_DELAY_FIRST_PROBE_TIME

- IPv6 MTU Increase Time-out (in sec):

  - Sets the maximum transmit unit increase timeout
  - Value is in seconds
  - Default value: 600
  - Symbol TCPIP_IPV6_MTU_INCREASE_TIMEOUT