This is a Workaround For vCenter Server 8.0U1 or above Summary Loading issue in the vSphere UI when the vCenter does not have access to the internet or a configured Proxy.
In vCenter Server 8.0U1 or above, the vCenter Details pane is blank on the Summary tab.
A vCenter Server which was recently been updated to 8.0U1 or above is loading the vCenter Details pane on the vCenter Summary tab very slowly. While watching the page load in the browser developer tools, we noticed that an 'apigw' call is erroring out after about 6 minutes with an error that says, "Configured repository is not accessible due to network connectivity or incorrect URL."
A timeout occurs in the API loading the vCenter Details pane when the vCenter does not have internet access.
Pending Resolution
Workaround:
Update Settings from VAMI shows the default repository URL, which the vCenter cannot access.
Follow the steps shared below to make the suggested changes.
Note: If the URL is https://vCenter_FQDN, vCenter summary pane loads more quickly.
Once this is setting is saved, the vCenter Details pane on the Summary page should load successfully.
This Workaround is only applicable when the VC doesn't have internet access and the customer is not willing to use the online repositories to update the VC.
For other scenarios, make sure to grant the proper internet access to vCenter's default URL repositories directly or through a Proxy configuration.