How to Set the Response Delay for a PXE Service Point

In System Center 2012 R2 Configuration Manager, you set the operating system deployment PXE service point response delay by updating ResponseDelay embedded property. ResponseDelay specifies how long the delay should be for this PXE service point before it responds to computer requests when multiple PXE service points are used. By default, the System Center 2012 R2 Configuration Manager PXE service point will respond immediately to the network PXE requests.

The delay is provided by the PXE client, and it shows the time that has passed since the client started the PXE boot process (seconds elapsed since client began address acquisition or renewal process). A client sends requests to the server at intervals of 0 (default), 4, 8, 16, or 32 seconds.

To set the response delay for a PXE service point

Set up a connection to the SMS Provider. For more information, see About the SMS Provider in Configuration Manager.
Make a connection to the distribution point instance with PXE enabled.
Get the embedded properties.
Update the ResponseDelay embedded property.
Commit the changes to the site control file.

Example

The following example method sets the response delay for a PXE service point.

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

C#	Copy Code
public void SetResponseDelay(WqlConnectionManager connection, string siteCode, string serverName, int delay){ try { //Connect to distribution point instance. IResultObject siteRole = connection.GetInstance("SMS_SCI_SysResUse.FileType=2,ItemName=\"[\\\"Display=\\\\\\\\" + serverName + "\\\\\\\"]MSWNET:[\\\"SMS_SITE=" + siteCode + "\\\"]\\\\\\\\" + serverName + "\\\\,SMS Distribution Point\",ItemType=\"System Resource Usage\",SiteCode=" + "\"" + siteCode + "\""); // Create temporary copy of the embedded properties. Dictionary<string, IResultObject> embeddedProperties = siteRole.EmbeddedProperties; // Enumerate through the embedded properties and makes changes as needed. foreach (KeyValuePair<string, IResultObject> kvp in siteRole.EmbeddedProperties) { // Setting: ResponseDelay if (kvp.Value.PropertyList["PropertyName"] == "ResponseDelay") { // Get current property value. Console.WriteLine(); Console.WriteLine("Property: {0}", kvp.Value.PropertyList["PropertyName"]); Console.WriteLine("Current value: {0}", kvp.Value.PropertyList["Value"]); // Change value. embeddedProperties["ResponseDelay"]["Value"].IntegerValue = delay; Console.WriteLine("Setting the {0} value to {1}.", kvp.Value.PropertyList["PropertyName"], delay); } } // Store the settings that have changed. siteRole.EmbeddedProperties = embeddedProperties; // Save the settings. siteRole.Put(); } catch (SmsException ex) { Console.WriteLine(); Console.WriteLine("Failed. Error: " + ex.InnerException.Message); }}

Copy Code

public void SetResponseDelay(WqlConnectionManager connection, 							string siteCode, 							string serverName, 							int delay){ try	{ 	//Connect to distribution point instance.						IResultObject siteRole = connection.GetInstance("SMS_SCI_SysResUse.FileType=2,ItemName=\"[\\\"Display=\\\\\\\\" + serverName + "\\\\\\\"]MSWNET:[\\\"SMS_SITE=" + siteCode + "\\\"]\\\\\\\\" + serverName + "\\\\,SMS Distribution Point\",ItemType=\"System Resource Usage\",SiteCode=" + "\"" + siteCode + "\""); 	// Create temporary copy of the embedded properties.		Dictionary<string, IResultObject> embeddedProperties = siteRole.EmbeddedProperties; 	// Enumerate through the embedded properties and makes changes as needed.		foreach (KeyValuePair<string, IResultObject> kvp in siteRole.EmbeddedProperties)		{ 		// Setting: ResponseDelay			if (kvp.Value.PropertyList["PropertyName"] == "ResponseDelay")			{ 			// Get current property value.				Console.WriteLine(); 			Console.WriteLine("Property: {0}", kvp.Value.PropertyList["PropertyName"]); 			Console.WriteLine("Current value: {0}", kvp.Value.PropertyList["Value"]); 			// Change value.				embeddedProperties["ResponseDelay"]["Value"].IntegerValue = delay; 			Console.WriteLine("Setting the {0} value to {1}.", kvp.Value.PropertyList["PropertyName"], delay); 	}	}		// Store the settings that have changed.		siteRole.EmbeddedProperties = embeddedProperties; 	// Save the settings.		 siteRole.Put(); }	catch (SmsException ex)	{ 	Console.WriteLine(); 	Console.WriteLine("Failed. Error: " + ex.InnerException.Message); }}

The example method has the following parameters:

Parameter	Type	Description
connection	Managed: WqlConnectionManager	A valid connection to the SMS Provider.
siteCode	Managed: String	The Configuration Manager site code.
serverName	Managed: String	The server name. For example, `“SERVER1.DOMAIN1.COM”`.
delay	Managed: Integer	The delay, in seconds.

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 Securing Configuration Manager Applications.