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SnapMirror is failing with CSM errors

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Category:
snapmirror
Specialty:
DP
Last Updated:

Applies to

  • ONTAP 9
  • SnapMirror

Issue

  • High SnapMirror lag-time reported
  • SnapMirror is failing with the following errors
    • CSM: Operation referred to a non-existent session
    • CSM: An operation did not complete within the specified timeout window
  • Packet traces reveal duplicate packets arriving on destination that the source did not send
  • Switch is reporting loop errors
    • 2022 Jul  1 12:28:45 Switch_01 %ABC-2-STM_LOOP_DETECT: Loops detected in the network for mac <> among ports Eth1/XX and Eth1/XX vlan XXX - Disabling dynamic learn notifications for 180 seconds

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