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Latency reported as ICMP packets dropped by storage interface (LIF)

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ontap-9
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Perf
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Applies to

  • ONTAP 9
  • SMB
  • NFS

Issue

  • The host tries to ping the cifsserver and on receiving no response, error is reported as below:
 
05/12/2023 11:54:56:251 | 03 | 040 | p5136 | t1096 | GetVolumeStatus | DiskMonitorThread.cpp(117) | Successful attempt to ping the location: \\cifsserver.LOCAL\file01
05/12/2023 11:54:56:380 | 03 | 015 | p5136 | t1096 | TestWriteAccess | DiskMonitorThread.cpp(32) | Fail test write access: A device attached to the system is not functioning.
 
  • EMS log shows the following events:
 
Wed Nov 29 12:54:43 +0530 [NODE-01: kernel: icmp.ping.throttle:notice]: icmp_input: The system dropped 2180 ping packets after limiting the packets to 200 per second.
Wed Nov 29 13:04:44 +0530 [NODE-01: kernel: icmp.ping.throttle:notice]: icmp_input: The system dropped 4522 ping packets after limiting the packets to 200 per second.
Wed Nov 29 13:14:46 +0530 [NODE-01: kernel: icmp.ping.throttle:notice]: icmp_input: The system dropped 2013 ping packets after limiting the packets to 200 per second.
Wed Nov 29 13:24:47 +0530 [NODE-01: kernel: icmp.ping.throttle:notice]: icmp_input: The system dropped 3477 ping packets after limiting the packets to 200 per second.

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