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 but not the running VMs.

This article is also useful in case ESXi displays "Invalid user or password" or web UI are not available and 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, using Physical Display and keyboard or IPMI

Step 2: Press "F2" to customise the system

Step 3: Login with "root" user and your password

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

Using ESXi Shell or Secure Shell

Step 1: Login to ESXi Shell or Secure Shell with "root" user 

Step 2: Restart the ESXi host daemon and vCenter Agent Services:

/etc/init.d/hostd restart
/etc/init.d/vpxa restart

Vmware related documentation:

Restarting the Management agents in ESXi
How to enable ESXi Shell or Secure Shell