How to Clear a PXE Advertisement for a Configuration Manager Resource

To clear a PXE advertisement for a Microsoft System Center Configuration Manager 2007 resource, you call the SMS_Collection object ClearLastNBSAdvForMachines method.

Clearing PXE advertisement is used to re-advertise a mandatory advertisement that is enabled for a PXE device or assigned to a collection. For information about clearing the PXE advertisement for a collection, see How to Clear a PXE Advertisement For a Configuration Manager Collection.

Clearing a PXE advertisement forces the PXE server to re-evaluate the mandatory advertisement that a PXE device must execute on the next PXE boot. It is most often used when the last advertisement that was executed failed or when the advertisement must be re-run.

To clear a PXE advertisement for a resource

Set up a connection to the SMS Provider. For more information, see About the SMS Provider in Configuration Manager.
Create the ClearLastNBSAdvForMachines method resource identifier array for the method parameters.
Call the ClearLastNBSAdvForMachines method to clear the PXE advertisement for the resource.

Example

The following example clears the PXE advertisement for the resource identified by the resourceID parameter.

For information about calling the sample code, see Calling Configuration Manager Code Snippets.

Visual Basic Script	Copy Code
Sub ClearPxeAdvertisementResource(connection,resourceID) On Error Resume Next Dim resources Dim InParams ' Set up the Resource array parameter. resources = Array(1) resources(0) = resourceID Set InParams = connection.Get("SMS_Collection").Methods_("ClearLastNBSAdvForMachines").InParameters.SpawnInstance_ InParams.ResourceIDs = resources connection.ExecMethod "SMS_Collection","ClearLastNBSAdvForMachines", InParams if Err.number <> 0 Then WScript.Echo "Failed to clear PXE advertisement for resource: " & resourceID Exit Sub End If End Sub

Visual Basic Script

Copy Code

Sub ClearPxeAdvertisementResource(connection,resourceID)

	On Error Resume Next

	Dim resources
	Dim InParams

	' Set up the Resource array parameter.
	resources = Array(1)
	resources(0) = resourceID

	Set InParams = connection.Get("SMS_Collection").Methods_("ClearLastNBSAdvForMachines").InParameters.SpawnInstance_
	InParams.ResourceIDs = resources

	connection.ExecMethod "SMS_Collection","ClearLastNBSAdvForMachines", InParams
	 
	if Err.number <> 0 Then
		WScript.Echo "Failed to clear PXE advertisement for resource: " & resourceID
		Exit Sub
	End If

End Sub

C#	Copy Code
public void ClearPxeAdvertisementResource(WqlConnectionManager connection, int resourceID) { try { List<int> resourceIDs = new List<int>(); Dictionary<string, object> inParams = new Dictionary<string, object>(); resourceIDs.Add(resourceID); inParams.Add("ResourceIDs", resourceIDs.ToArray()); IResultObject outParams = connection.ExecuteMethod("SMS_Collection","ClearLastNBSAdvForMachines",inParams); if (outParams == null \|\| outParams["StatusCode"].IntegerValue != 0) { Console.WriteLine ("Failed to clear PXE advertisement for resource " + resourceID); return; } } catch (SmsException e) { Console.WriteLine("Failed to PXE advertisement " + e.Message); } }

Copy Code

public void ClearPxeAdvertisementResource(WqlConnectionManager connection, int resourceID)
{
	try
	{
		List<int> resourceIDs = new List<int>();
		Dictionary<string, object> inParams = new Dictionary<string, object>();

		resourceIDs.Add(resourceID);
		inParams.Add("ResourceIDs", resourceIDs.ToArray());
	
		IResultObject outParams = connection.ExecuteMethod("SMS_Collection","ClearLastNBSAdvForMachines",inParams);

		if (outParams == null || outParams["StatusCode"].IntegerValue != 0)
		{
			Console.WriteLine
				("Failed to clear PXE advertisement for resource " + resourceID);
			return;
	}
}
	catch (SmsException e)
	{
		Console.WriteLine("Failed to PXE advertisement " + e.Message);
}
}

The example method has the following parameters:

Parameter	Type	Description
connection	Managed: WqlConnectionManager VBscript: SWbemServices	A valid connection to the SMS Provider.
resourceID	Managed: Integer VBScript: Integer	The resource identifier. You can obtain this from the SMS_Resource class ResourceId property.

Compiling the Code

The C# example has the following compilation requirements:

Namespaces

System

System.Collections.Generic

System.Text

Microsoft.ConfigurationManagement.ManagementProvider

Microsoft.ConfigurationManagement.ManagementProvider.WqlQueryEngine

Assembly

microsoft.configurationmanagement.managementprovider

adminui.wqlqueryengine

Robust Programming

For more information about error handling, see About Configuration Manager Errors.

Security

For more information about securing Configuration Manager applications, see About Securing Configuration Manager Applications.