One of the create extra features on most NICs nowadays is the support for Wake On LAN. An option to wake up your system by sending a signal to your Network Interface Card (NIC). This signal can be a so called Magic Packet.
All you need for this option is a Motherboard that supports Wake-On-LAN (WOL) or Power Management Events (PME); which has to be enabled in the BIOS. And a NIC that also supports WOL. Even though WOL is Operation System independent, it’s behavior is usually configured from within the OS.
I want to be able to use WOL as a startup method for my XenServer systems, Therefore I looked at the options Linux has to offer to enable a NIC to listen for special WOL packets and boot up the system.
This post offers instructions to enable the WOL support with XenServer 5.5.