How do you troubleshoot NFS APD all paths down issues on Vmware ESXi?

What would you do to troubleshoot when you Cannot mount an NFS datastore?

Check to ensure that the ESX/ESXi host is correctly configured to use an NFS share:

  1. Ensure that there is a vmkernel port group.
  2. Check the VMKernel IP address: …
  3. Check to see if the NFS server can be reached using vmkping.
  4. You can try to ping the ESX/ESXi VMkernel IP from the NFS storage.

17.02.2020

Has entered all paths down state?

The messages indicate that the system has turned on a timer that allows your VMware ESXi host to continue retrying attempts to re-establish connectivity with the device for a limited time period. By default, the APD timeout is set to 140 seconds.

How do I recover from APD?

Treating APD with Lifestyle Changes

  1. Improve classroom acoustics. …
  2. Seat children near the front of the class, away from an open door or a pencil sharpener or other classroom items that make noise, like fans or fish tanks.
  3. Provide attention prompts. …
  4. Streamline communication. …
  5. Use visual aids. …
  6. Build in breaks.

5.02.2021

What is all path down in VMware?

An All-Paths-Down (APD) situation occurs when all paths to a device are down. As there is no indication whether this is a permanent or temporary device loss, the ESXi host keeps reattempting to establish connectivity.

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What port is NFS?

NFS uses port 2049. NFSv3 and NFSv2 use the portmapper service on TCP or UDP port 111.

Can’t connect to NFS server?

To resolve this issue, ensure that there are no issues related to network connectivity, permissions on the NFS Server, or firewall settings: Note: Run all commands in these steps from the ESXi/ESX command line with root access. Ensure that you can ping and vmkping the NFS server address.

What is all path down?

All Paths Down (APD) is a condition where all paths to the storage device are lost or the storage device is removed. The state is caused because the change happen in an uncontrolled manner, and the VMkernal core storage stack does not know how long the loss of access to the device will last.

What is Datastore with PDL?

There are two types of datastore accessibility failure: PDL. PDL (Permanent Device Loss) is an unrecoverable loss of accessibility that occurs when a storage device reports the datastore is no longer accessible by the host.

What is Datastore with PDL and APD?

There are two distinct states a device can be in when storage connectivity is lost; All Paths Down (APD) or Permanent Device Loss (PDL). … All Paths Down (APD) is a condition where all paths to the storage device are lost or the storage device is removed.

How do you check multipathing on ESXi host?

To obtain LUN multipathing information from the ESXi host command line:

  1. Log in to the ESXi host console.
  2. Type esxcli storage core path list to get detailed information regarding the paths. …
  3. Type esxcli storage core path list -d naaID to list the detailed information of the corresponding paths for a specific device.
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2.03.2021

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