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NFS Datastores unavailable after ONTAP and Switch upgrade

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ontap-9
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nas
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Applies to

  • ONTAP 9
  • Cluster Switches
  • VMware NFS Datastores

Issue

  • After upgrading ONTAP and the cluster switches, NFS datastores became inaccessible when the volume was not local to the NFS LIF.
  • Symptoms included:
    • High latency and zero throughput on affected volumes
    • VMware VMs disconnected or lost access to datastores
    • Migrating NFS LIFs to other nodes temporarily restored connectivity
    • Diagnostic analysis revealed that cluster switch ports 49 and 50 had no configuration applied, despite being present in the RCF file
    • Jumboframes (9000 MTU) were not working across inter-switch links

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