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Re: [Qemu-discuss] wake on lan support

From: Jakob Bohm
Subject: Re: [Qemu-discuss] wake on lan support
Date: Mon, 17 Aug 2015 12:01:16 +0200
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0

On 17/08/2015 10:52, Lior Nahmanson wrote:


does QEMU support Wake On Lan feature while using the standard libvirt (assuming I implement a NIC that support this feature)?

Lior Nahmanson


When a QEMU virtual machine is "powered off", the qemu
program is not running and cannot do anything.

However if another program on the host computer (maybe
libvirtd, maybe something extra) watches the network
for "wake-on-lan" packets matching the MAC in the
virtual machines configuration, then that program
could start the computer when the wake-on-lan packet

I don't remember the standard way for a physical
wake-on-lan card to tell the booting OS that the
computer was powered on due to a wake-on-lan packet
arriving, but this can probably be emulated in some
trivial way too.


Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
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