vCenter VAMI "Network update in progress" stuck at 50% "Modifying network Configuration" with a warning "Avoid refreshing your web browser to ensure a successful network upgrade" after adding incorrect additional DNS IP address

Products

• VMware vCenter Server

Issue/Introduction

• VAMI page stuck loading and "cancel network update" is grayed out.
• Normal vCenter UI is not affected and works as normal.
• After adding wrong additional DNS IP in DNS configuration through VAMI, the UI gets stuck at the following:
  

Cause

If incorrect IP address was added as an alternative DNS, after applying the change, Appliance Management page may get stuck at Modifying Network Configuration.

Resolution

• To unstuck the VAMI page, you can restart the applmgmt service through SSH connection to vCenter:
  1. Take offline snapshot of vCenter VM
  2. Connect to vCenter over SSH session
  3. Login as root
  4. Type shell to access shell
  5. Run the following command to stop Appliance Management Service:
     

     service-control --stop --applmgmt

     Once the service is stopped, run the following command to start the service:
     

     service-control --start --applmgmt

• You should be able to login to VAMI page now. After logging in, you can edit the incorrectly added alternative DNS IP address