Sometimes it happened to me that the HP ILO (Integrated Lights Out) is unresponsive. Not only the remote console but the whole web interface. In the past I used to shut down the server, unplugged it, plugged it in again and booted it. Well this is pretty uncool in combination with service level agreements, he?!
But here is what you can do if your ILO is unresponsive now:
If you can still login to the website, you can go to the administration -> network settings pane and simply click apply. ILO will reset itself and everything should work fine after that. If installed on the servers operating system, you could also use the HP Lights-Out Online Configuration Utility.
If you cannot login to the ILO webinterface you can try to login via ssh. Simply open putty (or something else) and enter the ILO ip. If this works ILO will ask you for credentials… Login and you will see the name of the server and its current power status. No type the following commands:
Now ILO is resetting…
If you cannot even login via ssh, you may have a third option. Download the latest ILO firmware upgrade utility, or if company policies do not allow that, download the firmware for the ILO version you are using at current. Login to your server and run the firmware upgrade. If it is the same version, the utility will tell you that installation is possible but not needed. Of course run the upgrade. When completed the utility will tell you that it will reset ILO now. Thats all…
If none of these did the trick, you can finally shut down your server unplug it, …