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High  latency post Ontap upgrade with CX5 ethernet ports

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Applies to

  • Ontap 9
  • Dual 40G/100G Ethernet Controller CX5

Issue

  • Post upgrading from 9.12.1P2 to 9.12.1P15  Ontap to high latency is seen on multiple FlexGroups and FlexVols volumes.
  • Most of the latency is accounted at the cluster interconnect layer.
  • High count of CRC errors is seen on a cluster port of one of the Node in the cluster.

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