Registration/Unregistration of third-party IO filter storage provider fails on a host alarm on ESXi host.

Products

• VMware vSphere ESXi

Issue/Introduction

• ESXi host might show an alarm triggered as below:

Registration/Unregistration of third-party IO filter storage provider fails on a host.

Environment

• VMware ESXi
• VMware vCenter Server

Cause

• TCP port 9080 must be open between vCenter Server and ESXi. If blocked, VP service registration fails and the alarm is triggered.

Resolution

To resolve this issue, unblock TCP port 9080 between the vCenter Server and the ESXi host.

Notes:

• This alarm can be ignored if you don't use features provided by I/O filters.
• This can be a known cosmetic issue.
  When hosts are restarted, the storage providers of the host can be temporarily unavailable.
  This can happen because the host is not fully booted up yet, and the IO filter is truly not reachable/registerable yet.
  If this alarm is triggered, check the online status of the IO Filter storage and validate the VASA storage provider is compatible with vCenter and ESXi.
  If compatibility and online status are good, try resetting the alarm to green to see if the alarm is re-triggered.

Additional Information

• vSphere Ports and Protocols
• VASA Provider Registration Troubleshooting