PXE Filter and Obsolete Machines

By Rikard Ronnkvist, 2008-06-10 09:39 ConfigMgr

There is a small problem with the PXE filter and obsolete machines.

Today the PXE-Filter scans the SCCM-database for the machine and doesn’t bother if the machine is obsolete or not… and that might result in problems (The filter adds the obsolete machine to your collection).

Since the PXE-Filter is a VBScript… you can create a small hack…

Around row 150 you will find:

bFound = False
Set oClients = oSMS.ExecQuery(sQuery)
For each oClient in oClients
        bFound = true
        iResourceID = oClient.ResourceID
        PXE.LogTrace "Found existing machine " & oClient.NetbiosName & " with ResourceID = " & iResourceID
        sNetBiosName = oClient.NetbiosName
        Exit For
Next

Change that piece of code to:

bFound = False
Set oClients = oSMS.ExecQuery(sQuery)
For each oClient in oClients
        If oClient.Obsolete = 1 Then
                PXE.LogTrace "Found obsolete machine " & oClient.NetbiosName & ", skipping"
        Else
                bFound = True
                iResourceID = oClient.ResourceID
                PXE.LogTrace "Found existing machine " & oClient.NetbiosName & " with ResourceID = " & iResourceID
                sNetBiosName = oClient.NetbiosName
                Exit For
        End If
Next

That will result In a WDSServer.log (If you turn on tracing)

[4332] 09:49:22: [WDSPXE] [Microsoft.BDD.PXEFilter] Request from 10.26.64.240:67 Len:548
[4332] 09:49:22: [WDSPXE] [Microsoft.BDD.PXEFilter] About to run script
[4332] 09:49:22: [WDSPXE] [Microsoft.BDD.PXEFilter] Processing request from MAC address = 00:1E:0B:34:0F:E7, IP address = 0.0.0.0, UUID = E11832C1-58C0-DC11-BBDA-0B340FE7001E
[4332] 09:49:22: [WDSPXE] [Microsoft.BDD.PXEFilter] Found obsolete machine RIRO003, skipping
[4332] 09:49:22: [WDSPXE] [Microsoft.BDD.PXEFilter] Found existing machine RIRO003 with ResourceID = 112
[4332] 09:49:22: [WDSPXE] [Microsoft.BDD.PXEFilter] Added new membership rule to collection B0100012