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Old 08-30-2018, 05:58 PM   #1
fannyman
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Can Wake-on-lan be enabled without using the bios menu?


I have a cluster with 50 Dell sc1435 compute nodes running centos7 and would like to enable wake-on-lan on them. I know how to do it from the bios, but would prefer to do it through the command line because even though it's doable, it'd still be a hassle to hook each of them up to the monitor and set them manually.

I tried using nmcli with the "magic" option and ethtool with the "g" option, and those tools show that it's set correctly, but it doesn't work when tested with ether-wake, and the bios still shows "disabled". Does it absolutely require enabling it in the bios?
 
Old 08-30-2018, 06:24 PM   #2
ferrari
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You can check if enabled with ethtool. For example
Code:
ethtool eth0|grep -i wake
 
Old 08-30-2018, 08:21 PM   #3
fannyman
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These are the results of that ethtool command:

Code:
Supports Wake-on: g
Wake-on: g
It looks like it should work, but doesn't. I enabled it on a couple of nodes by using the bios so I can compare. The ethtool results are the same, but only the ones that were configured from the bios actually wake from lan commands.
 
Old 08-30-2018, 08:23 PM   #4
ferrari
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Yes, that just means it's capable and configured with respect to the NIC. It will also need to be enabled within the BIOS.
 
Old 08-30-2018, 08:31 PM   #5
fannyman
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I see, thanks. Looks like there's no way around it, but I guess it's more secure that way
 
  


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