I'm trying to configure Wake on LAN and have followed http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a008084b55c.shtml to how I think it needs to be configured in our environment but it doesn't appear to work.

* 2x Catalyst 4507 (one at each end of campus)
   Main Catalyst 10.10.32.88
* multiple Nortel switches
* a few Cisco switches
* Using Dell KACE which is the WoL server. Is 172.20.95.15
* Various VLANs eg 10,20,21,30,31,100
* DHCP servesr 10.11.0.7 and 10.11.0.8
* My PC 10.100.0.14
* PC to wake up 10.100.0.3

Extract from config (of main Catalyst):

WoL is enabled in the BIOS of 10.100.0.3 but when I send the command (using Solarwinds WoL tool) it doesn't start the PC.

Any ideas why it won't work?

It turns out that the SolarWinds WakeOnLAN tool (http://www.solarwinds.com/products/freetools/wake_on_lan.aspx) does not wake up a Dell OptiPlex GX780. And nor does ProfShutdown (http://www.profshutdown.com)

Running Wireshark on a powered on GX780 and sending a magic packet to it from either of these tools shows that it does arrive and from what I can see if looks like it's in the correct format. But it just won't wake up the computer.

Using Dell KACE and also Faronics Deep Freeze to send the magic packet does work...if the BIOS is set correctly. There are 2 settings in a Dell BIOS - one to enable WoL and one to disable lower power.

Following up on this issue.....

WoL works sometimes but not others. I think there are various issues that are affecting this not just one.

Dell KACE was configured to send WoL to all known devices on VLAN20. This would wake some up but not others. Sending WoL to an individual PC that would not be woken by a group message would sometimes work. Sending individual WoL to a PC that would not be woken by a group message would not wake 2 (that I know of) PCs and the cause was the Nortel switch had those ports set to not negotiate connection speed.

Yesterday I reconfigured KACE to send a group WoL in a different way which appeared to be much better. Multiple tests showed that it would wake PCs that it had not woken before. Computers are automatically shutdown at 730pm. KACE was scheduled to WoL at 715am but it did not wake PCs that were being woken perfectly yesterday. This, to me, says that there is something in the Cisco 4507 that means it has forgotten where to find the PC and therefore can't send the WoL to it. Does that sound feasible? In saying that, I just tried sending an individual WoL to a PC that would not be woken by a group message today but would yesterday.

Any ideas?