ESXi 5.5/6.0 fails to restore NFS mounts automatically after a reboot

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• Rebooting an ESXi 5.5/6.0 host reports the NFS datastore that it uses as disconnected.
• The NFS datastore is grayed out in the vSphere Client.
  

Environment

VMware vSphere ESXi 5.5
VMware vSphere ESXi 6.0

Cause

This issue occurs if the spanning tree protocol setting on the physical network switch port(s) is not set to portfast.

Note: The spanning tree protocol setting is used by the ESXi host to access the NFS storage device.

If the ESXi host has network connectivity issues during boot time, the NFS mount process may time out during the spanning tree protocol convergence.

Resolution

This is an expected behavior with certain spanning tree configurations.

To resolve this issue, set the spanning protocol to portfast for all physical switch ports used by ESXi hosts.

Note: VMware recommends all physical switch ports connected to ESXi hosts that use spanning tree protocol be set to portfast.

For more information, see STP may cause temporary loss of network connectivity when a failover or failback event occurs (1003804).

Additional Information

STP may cause temporary loss of network connectivity when a failover or failback event occurs
ESXi 5.5 ホストを再起動すると NFS の自動マウントに失敗する