Wake On Lan Feature - How to enable??

Hi..
I would like to enable WoL feature in certain part of our network. Is there a global command to enable that?. or does it only require 'dot1x control-direction in' interface configuration?..
Also does the WoL Magic packet get forwarded through routers??
Any help appreciated.
Thanks.
GT

Could I just clarify the answer that Rick gave? I fear that it might give the impression that the ip helper-address is on the remote LAN, which it is not.
You should put the ip helper-address on the LAN where you have the management server that is trying to wake up the remote PCs. If the remote PCs are distributed across several remote LANs, you will need one ip helper-address command on the "central" LAN for each and every remote LAN you are trying to get to. You can have as many ip helper-address commands as you need to cover the remote LANs you have.
As Rick says, if you have multiple routers between the server and clients, then the ip helper-address commands only need to be on the LAN that hosts your management server.
What the ip helper-address command does, is to recognise broadcasts on the server LAN, and convert them into unicasts to the address you specify: in my example 192.168.42.255. These unicasts are routed through the network in the normal way until they reach the destination LAN. When they get there, the client LAN's router say "eh-up, this is my IP subnet broadcast address; I had better put a broadcast MAC header on it." But it will only do that if you have configured ip directed-broadcast on the target LAN.
If you think of the way it works, you could even do WoL across the Internet, where you do not have the hand on the intermediate routers.
Is that OK?
Kevin Dorrell
Luxembourg

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