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What are the effects of options ip.ping_throttle.drop_level 0 on system environment?

Last Updated:

Applies to

  •  Data ONTAP 8 7-Mode    
  •  ONTAP 9 


What are the effects of options ip.ping_throttle.drop_level 0 on the system environment?
  • The ping throttling mechanism was introduced to mitigate risks from denial of service attacks based on the ICMP protocol.
  • The existing ping throttling mechanism uses the value stored in the option ip.ping_throttle.drop_level option to obtain a threshold of packets to accept before dropping packets, in a one-second interval.
  • NetApp does not currently have a recommended value to set ip.ping_throttle.drop_level.
  • The default value is 150. The value can be increased to a higher value.
  • The option ip.ping_throttle.drop_level setting is not as per client; however, it is for all clients. The max limit is 4294967295.
  • The reason that NetApp does not recommend any value in environments with many CIFS clients is that a threshold exceeds easily.
  • As a result, CIFS clients experience temporary to persistent unavailability of the appliance. 
  • Set  ip.ping_throttle.drop_level option between 50 to 150 and increase if an issue arises.
  • To allow clients to send more than 16 packets per second, disable ping throttling. Run the following command to disable this option:

options ip.ping_throttle.drop_level 0

  • After ONTAP 9.3+, the node shell command was deprecated for this new cluster-sell option:

::> network tuning icmp

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