Hello.
I have a Blade Center ibm h22 and 8 blades in it. All of them are running ESXi 5.5 7618464 It's newly installed after 5.1
Installation was proceeded as upgrade.
Also i installed new vCenter 6.0.
Everything works fine, except for one blade. From time to time it gives me error "Unable to connect the MKS: Could not connect to pipe \\.\pipe\vmware-authdpipe within retry period". Reboot helps for 2-3 days. Because of this Veeam backup also fails with VMs on this blade.
I'm really sorry for my awfull english.