Unable to PXE boot over subnet

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  • #2784
    rcarmack
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    I have a WDM server on a Windows XP Pro box. DHCP is running on same subnet as WDM. We have IP helpers configured on the router. No problems with V90LE’s that are on the same subnet as the WDM. I can automatically detect the thin clients on the seperate subnet, but in the Device Manager, it shows them as “PXE Capable – No”. Rebooting the devices and remote shadow from the WDM seems to work ok for those TC’s on the seperate subnet. All thin clients on seperate subnet are V90LE’s.

    What is missing that I need to do in order to be able to image the TC’s on a seperate subnet? I was hoping that the IP helpers would do the trick. All help is greatly appreciated.

    #15942
    ConfGen
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    Are the IP helpers pointing to the DHCP AND WDM server? You will need at least two IP helpers in your case.

    CG

    #15943
    rcarmack
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    I have IP helpers pointing to both the DHCP server that were previously in place before the WDM, and I have also recently added IP helpers to point to the WDM also.

    #15944
    ConfGen
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    Set the WDM eventlog to Debug to see if DHCP requests are reaching the server at all. (Configuration Manager-Preferences-Logging). Logs can be seen in the system tray.

    CG

    #15945
    rcarmack
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    I can see several DHCP packets, and they keep repeating themselves and are from a TC that I do not have listed in the device manager. There is one other device that keeps sending DHCPINFORM packets that is on the same subnet as the WDM, and it is listed in the device manager.

    #15956
    rcarmack
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    Ok, I deleted all of the thin clients from the seperate subnet, and they are reappearing slowly.

    I found that deleting the clients on the same subnet as the WDM from the device manager causes them to send DHCP request to the WDM as they check in and reappear on the list.

    If I do this for the clients on the troublesome subnet, i am not seeing the DHCP request. Some are slowly reappearing, even though the WDM IP address is configured in Rapport in the Control Panel on all devices. I suppose this means that the IP helper is configured incorrectly?

    #15957
    rcarmack
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    Another update:
    I am seeing some DHCP request now from the remote subnet. It shows them as PXE capable for a few minutes after they appear in the device manager, and later changes to PXE unavailable.

    If the DHCP request are making it to the WDM, then that means that the IP helper is configured correctly?

    All devices are connected to a Cisco 2960 48 port switch(es).

    #16742
    J027
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    I’m having an issue that seems to fit into this category

    “In other cases, if the thin client is sitting on different subnet with DHCP relay or a redundancy router (not the real DHCP sever) the DHCP relay will answer the PXE broadcast request, and at the same time the real DHCP will also answer the PXE request from the thin client. This results in a conflict of information to the WDM database. With this scenario you will see the thin client register in the WDM as Imegeable=YES, eventually will flip back to NO, and flip back and forth.”

    That block of text was given to me by Wyse customer support, but no solution was attached.

    If I right click devices in wdm and select refresh device configuration, the pxe status changes to “yes.” When I try to get device image it will start the process on the thin client, then after it reboots it does not pick up on the pxe boot and boots to windows instead. Then when I look back in WDM the pxe capable status says “no.”

    The WDM is running on a virtual server with no other services. We do have ip helpers in our configuration. Any advice would be appreciated.

    #16745
    J027
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    This post is in conjunction with my previous post. I set logs to debug and I am not receiving dhcp packets from any of my thin clients when trying to get device image.

    #16747
    thinkthin
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    Is this your configuration:

    Router one:-
    Has IP helper address pointing to the DHCP server and WDM server, the DHCP server is a seperate server behind the router.
    (I assume this is what you mean when you say DHCP relay)

    Router Two:-
    Is for back up and has a DHCP server hosted on it and IPhelper for WDM?

    Cheers,
    -TT

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