High latency after ONTAP upgrade with CX5 Ethernet ports
Applies to
- ONTAP 9
- Dual 40G/100G Ethernet Controller CX5
Issue
- After upgrading from ONTAP 9.12.1P2 to 9.12.1P5, high latency is seen on multiple FlexGroup and FlexVol volumes.
- Most of the latency is determined to occur at the cluster interconnect layer.
- High counts of CRC errors are seen on a cluster port of one of the nodes in the cluster.