I actually have a SR open on 4.7.510 where hosts will randomly and consistently disconnect from vCenter. We're running a G560.

We are experiencing the same issue reported by @tuxthepenguinx. 

We are on 4.7.511 on 7 host cluster of P570F and it seems like at least once per week one of our hosts will just randomly disconnect. 

Very disconcerting when those alerts come through. We probably have 6 or 7 SR's opened over the last few weeks for this exact issue. 

Some support engineers have told us it is a known issue. Others have said there is no known issue. 

For anyone thinking about upgrading... I'd wait for a release where this specific condition is called out as fixed in the release notes.

@maltedhops and others that may be having this issue...

This issue started on 4.7.510 and is most likely occurs on 4.7.511, if you are on a version prior to these I would avoid upgrading for the time being.The engineer I have been working with said the following:

"I wanted to provide you with an update, VMware has confirmed that the fix for this issue will be included in 6.7 P 03. However there still isn't a firm release date for this version and it will be sometime after the vmware release that it gets integrated into a VxRail release. "

It should be noted I am running a G560 14G that has this issue.

4.7.515 is released on Sep 4

Includes esxi 6.7 patch 03

Fixed issue:

VXP-20727: vSAN route is missing on the L3 first node of the initial segment after the second node of the second segment validation is done.

Packaged versions:

VMWare ESXi 6.7 Patch 03 GA build 16713306
VMware vCenter Server Virtual Appliance (vCSA) 6.7 U3j GA build 16708996
VMware vSAN 6.7 Patch 03
VMware vRealize Log Insight 4.8.0-13036238

vxRail 4.7.515 Release notes: https://support.emc.com/docu91467

VMware 6.7 Patch Release notes: https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202008001.html