WON not working after Power Outage

[mattx]

Interesting to find out if anyone has experienced this problem.....

Power outage over the weekend - [ I was in switching everything off, servers, switches etc ] - all went well, turned everything back on and hunky dory.
Come in this morning and only a few of the WON PCs I set to come on at 7:30am have come on.
I run the script manually and nothing. This has been working for ages. I run the script from my workstation, nothing......
What am I missing ?

[sparkeh]

Generally, Wake on Lan requires a clean shutdown of the PCs to function correctly, a power outage can effect this.
Have you tried powering on an affected machine, shutting down and rerunning the script?

Edit: Rather than 'generally' I should perhaps have said 'dependant on machine and model' - some machines support WOL after power failure, some don't.

[mattx]

Generally, Wake on Lan requires a clean shutdown of the PCs to function correctly, a power outage can effect this.
Have you tried powering on an affected machine, shutting down and rerunning the script?

All the PCs were shutdown cleanly as I knew the outage was going to happen.
I'll see what happens in the morning as I have now manually powered the PCs back on.

[sparkeh]

All the PCs were shutdown cleanly as I knew the outage was going to happen.

Sure but (dependant on machine) the fact that power to the machine was cut, even when the machine was powered off, can stop WOL working. The network card needs power to be reserved for it when powered down, after a power failure some machines will restore power to the NIC, some won't.

[danrhodes]

We have problems with LAN when we have blackout / brownouts (No silly comments please).

The solution we have found is to go into the bios, disable the NIC and everything asociated with it. Save settings and power cycle.

Enter the bios again and enable the NIC and everything asociated with it. Then try your WOL/WON and you may find that it is back working again.

D