It might happen that after restart of the ESX it’s not possible to connect it back to vCenter or connect directly with vSphere client it’s not possible. Problem usually disappears after 15 minutes or so. vSphere client gives an error: The server could not interpret the communication from the client ( The remote server returned an error : (503) Server Unavailable) Restart management services doesn’t help ( service...

In pre vSphere 5 if you would like to enable Jumbo Frames (MTU 9000) on your ESX/ESXi host you had to tun command: esxcfg-vswitch -m In vSphere 5 you can do it from GUI (vSphere client), Right clicking on Properties of your vSwitch in General tab at bottom you can change MTU setting. MTU size for Jumbo Frames is 9000 and remember – whole network stack has to support Jumbo Frames beginning from ESX(i) server –> network...

This page is,  for admins which has some experience with VMware. It has basic information which could help with daily basis VMware ESX and Virtual Center administration. It will be divided by few stages such as: Command Line Interface and Log location, processes, port numbers, etc. I will not put  such information as how to connect to ESX server via VI client or how to install ESX box. I’d rather going to write information which are...