Using Wake on LAN

[PaulT84]

Hi All,

 

I am looking in to using WOL to power on classroom workstations first thing of a morning.

 

Has any one any advice on the best way to implement this? Has anyone ever done this before?

 

Thanks in advance

 

Paul

[Geoff]

Yes I have this working here. There's three bits you need to get right.

 

1. (Assuming you have VLANs) Allow directed broadcasts from your source VLAN to your destination VLAN in your network switch(s) config. I can provide an example for Procurve.
   
2. Your PCs need to support WoL properly. This is simply a case of getting the BIOS settings right. I have Dell Optiplex 760 workstations so I can only give these as an example.
   
3. Your Windows NIC drivers also need to support WoL and have the options set correctly. Again anything with an Intel card is ok (like my Dells). Realteks/Broadcom, not so much.
   

Edited September 26, 2017 by Geoff

[Davit2005]

Yes I have this working here. There's three bits you need to get right.

 

1. (Assuming you have VLANs) Allow directed broadcasts from your source VLAN to your destination VLAN in your network switch(s) config. I can provide an example for Procurve.
   
2. Your PCs need to support WoL properly. This is simply a case of getting the BIOS settings right. I have Dell Optiplex 760 workstations so I can only give these as an example.
   
3. Your Windows NIC drivers also need to support WoL and have the options set correctly. Again anything with an Intel card is ok (like my Dells). Realteks/Broadcom, not so much.
   

 

Hi Geoff,

Id'd be interested in a ProCurve example if you could provide one to enable WoL on vLANS :-) .

[Geoff]

Hi Geoff,

Id'd be interested in a ProCurve example if you could provide one to enable WoL on vLANS :-) .

 

Ok this assumes that:

 

• VLANs have a one to one mapping to an IP Range.
  
• You are using the Procurve as a router (you have

  ip routing

  in your config).
  

• You have WoL set to 'Subnet directed Broadcasts' in your SCCM Site Config.
  
• In the SCCM port settings, your UDP WoL port is 9 (the default).
  

 

On the 'sending' VLAN (Where your SCCM Site Server or Distribution Point is):

 

ip udp-bcast-forward
ip forward-protocol udp  9

 

On the receiving VLAN (where your clients are)

 

ip directed-broadcast

 

You can verify the packets are working using wireshark. The capture filter you need is 'ether proto 0x0842 or udp port 9'.

Edited September 26, 2017 by Geoff