Applies to: all versions
If you're experiencing ESXi connectivity issues, you should consider to restart Management Agents on your ESXi host.
The restart may impact any tasks that are running on the ESXi host.
This article is also useful in case ESXi displays "Invalid user or password" and/or SynetoOS displays "Local hypervisor is inaccessible".
Restart Management Agents using DCUI (Direct Console User Interface)
Step 1. Connect to the console of your ESXi host. You can use IPMI.
Step 2. Press "F2" to customize the system.
Step 3. Login with "root" user.
Step 4. Use the Up/Down arrows and navigate to "Troubleshooting Options > Restart Management Agents".
Step 5. Press "Enter".
Step 6. Press "F11" to restart the services.
Step 7. When services are restarted, press "Enter".
Step 8. Press "Esc" to log out.
Restart Management Agents using ESXi Shell or Secure Shell
Step 1. Login to ESXi Shell or Secure Shell with "root" user (How to enable ESXi Shell or Secure Shell).
Step 2. Restart the ESXi host daemon and vCenter Agent Services:
/etc/init.d/hostd restart /etc/init.d/vpxa restart