20 กันยายน 2554 8:59
Wake on LAN seems to be quite unreliable. has anyone experience in that area ?
My server seems to have a WOL configuration which is working, since it was able to wake up clients in different subnets. But as soon as the Computers are turned off one day it does not work anymore.
The SCCM log looks good, no errors at all. And I can verify that the configuration is working.
As far as i know the SCCM needs a valid hardware inventory, i do not think that within one day the data is invalid. (Since i tested it over a period of one week, and turned the computer on serveral times in that week)
The only thing i can imagine ist the power saving option. Does that depend on the drivers installed in the device manager ?
The energy saving mode is turned off in the BIOS settings, nevertheless after one day he won't wake up anymore.
does a BIOS update make sense ?
Has anyonne an idea ? Has anyone managed to implement WOL successfully/reliable ?
- ย้ายโดย Raul TalmaciuMicrosoft 20 กันยายน 2554 10:26 SCCM WoL Question (From:System Center)
20 กันยายน 2554 13:14
There are LOT of customers who use WOL. There are lot of dependency involved in this. Have you scheduled any mandatory advert to send the magic packet? have you gone through WOL related log file ?
Some more interesting points about WOL http://blogs.technet.com/b/smsandmom/archive/2008/03/04/configmgr-2007-implementing-wake-on-lan-wol.aspx
Troubleshooting steps : http://technet.microsoft.com/en-us/library/bb694164.aspx
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24 กันยายน 2554 11:28
There are many factors why your machines won't wake up. One is the Arp and routing table on the router. If that clears out, as some do after 24 hours, then you won't be able to turn them on becuase the router doesn't know where they are.
Test with a machine off for 2 days. Use a free WOL tool. If that can wake it and ConfigMgr can't then you have a problem with a port or something else. We have the WOL packet blocked across routers so we can't use WOL outside of the single subnet. It also depends on which method you are using to wake them up and the network card/driver as you mentioned.
Most people have implmented out of band managment to get past some of the issues with the WOL technology. Otherwise you can invest in 1E night watchman that keeps at least 1 machine on in the subnet and uses it to send out the packets to wake the machines.
Yes, there are problems with WOL but it generally isn't in SCCM it is network or individual computer that is causing the issues.
- ทำเครื่องหมายเป็นคำตอบโดย moehringd 21 ตุลาคม 2554 11:14
26 กันยายน 2554 12:22
unfortunately I did not have the time to read the links precisely.
But as far as the logs are concerned everything seems fine even though the machines are not waking up .
I think there is only the WOL.log on the sccm server to check , which seems fine.
26 กันยายน 2554 12:48Have you tested what Matthew suggested?
You might also have to use a tool like Wireshark or NetMon to trave the activities.
Torsten Meringer | http://www.mssccmfaq.de
21 ตุลาคม 2554 11:17
Hi, thank you for your response.
We were able to "solve" the problem. Now I am reading your post and I think it matches with your suggested solution.
I haven't had the time to test it , but my colleague from networking services told me, that the mac table are only valid for half an hour !!! This would explain why machines won't wake up...
since I do not know about the network configuration I only could concentrate on the SCCM as possible failure source.
Thank you for your assisstance
22 พฤศจิกายน 2554 6:59
i have the same issue my packet send successfully from SCCM but machine cant wake up , what should i check , while i already try a freeware tool on same machine its works successfully
22 พฤศจิกายน 2554 8:23
It's also worth checking what moehringd mentioned: the ARP cache on some network devices might store MAC information only for a limited amount of time. You should also use Netmon or Wireshark to get a detailed view what's happening behind the scenes.
It would be great if you could avoid double postings. You already asked the exact same question in http://social.technet.microsoft.com/Forums/en-US/configmgrgeneral/thread/9d8b8dff-c5a4-45b7-abe1-cd4c3e304dc3/#48d0316d-d88c-445d-800d-d5046b6e0087 (which is the better place to ask, since this subforum is for 'Power Management' related questions)
Torsten Meringer | http://www.mssccmfaq.de
- แก้ไขโดย Torsten [MVP]MVP 22 พฤศจิกายน 2554 8:28