We use WOL here at KBS.  Some machines require a low power setting in the BIOS that is less rigorous than the default.  I have found that the WolCmd.exe [Copyright www.depicus.com (Brian Slack) 1966-2005] requires the sending machine to be on the same IP subnet as the receiving machine whose IP address is specified on the command line.  However, since the IP address specified on the command line is only used to determine which broadcast address to use, like 192.108.188.255, the ip address does not need to match the destination computer.  Most routers don't relay broadcast addresses (those ending in 255), so WOL does not work across subnets separated by routers.

Just to be sure, on our network with four sets of addresses (not separated by routers), I sent a magic packet to a machine whose address is in 192.231.113.x (when awake), by specifying my own address from the subnet 192.108.188.x on the command line.  The broadcast address 192.108.188.255 was used to send the packet containing the destination machine's MAC address which was specified on the command line.  The target machine woke up.

-Stefan

On 8/13/2012 12:41 PM, Wortz, Joshua wrote:
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Depending on your subletting this should work. WOL runs layer-2 by either a broadcast or talking to a specific MAC address. This also means it can’t route. So the machine you use to send your WOL, will need to be on the same subnet as your target machine.

 

From: Jon Galbreath [mailto:[log in to unmask]]
Sent: Monday, August 13, 2012 12:25 PM
To: [log in to unmask]
Subject: [MSUNAG] Wake On LAN

 

Does anyone use Wake On LAN to remotely wake a machine for maintenance or other tasks?  Or can someone comment on whether it even works with MSU’s network?  My workstation has a static IP address with most of the computers in the building using DHCP addresses, so routing could obviously be an issue.

 

Any thoughts are appreciated.

 

Thanks!

Jon

 

Jon Galbreath, MCSE

Systems Administrator

International Studies and Programs

Helpdesk: 517-884-2148

Ph: 517-884-2144

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