Did you tried disable and enable the health check and see if the error appears again? And tell us details about your host network hardware and check that another thread: Re: Teaming and failover status comes up as warning -- NON IP Hash mismatch---
Senior Infrastructure Specialist
Yes I already tried to dis- and enable it.
The Link to the other threat I already found before but there is no match to v6.5 only for earlier versions.
Regarding my hardware it's a HPE QLogic NC382i/NC532x aka NC523SFP.
The mentioned firmware on the VMware side is not available neither via VMware nor via HPE support. I don't think/hope that this is the cause of the problem, because I have the latest available firmware and drivers from HPE.
Do you need any more information ?
I experienced the same event at vSphere 6.5U2.
I cleared "Non-IP Hash Mismatch" warning by the following procedure.
1. Delete ESXi with Non-IP Hash Mismatch displayed from Distributed Switch
2. Rejoin ESXi to the Distributed Switch