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CIFS connections became unstable after ONTAP upgarading

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nas
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Applies to

  • FAS2720
  • Cisco Catalyst 3650 Switch
  • Upgrading from ONTAP 9.8P8 to ONTAP 9.13.1P13

Issue

  • After upgrading ONTAP from 9.7P8  to 9.13.1P13 both Linux and Windows CIFS connections became unstable .
  • From packet trace, the ping responses disappear on switch.
  • when run command # lsof +D /var/local/hpc from any of the Linux clients then the CIFS became stable.

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