Logo
programming4us
programming4us
programming4us
programming4us
Home
programming4us
XP
programming4us
Windows Vista
programming4us
Windows 7
programming4us
Windows Azure
programming4us
Windows Server
programming4us
Windows Phone
 
Windows Server

Microsoft Exchange Server 2007 : Load Balancing in Exchange Server 2007

- How To Install Windows Server 2012 On VirtualBox
- How To Bypass Torrent Connection Blocking By Your ISP
- How To Install Actual Facebook App On Kindle Fire
2/13/2013 3:53:18 PM

Another high-availability technology provided with the Windows Server 2003 platform is Network Load Balancing (NLB). NLB clusters provide high network performance and availability by balancing client requests across several server systems. When the client load increases, Windows NLB clusters can easily be scaled out by adding more nodes to the NLB configuration, to maintain an acceptable client response time to client requests.

Using NLB offers administrators the ability to leverage two dynamic features: First, to implement Windows NLB clusters, no proprietary hardware is required and NLB clusters can be implemented and configured through Windows management interfaces fairly easily and quickly.

NLB clusters are most effectively used to provide front-end support for web applications, virus scanning, and Simple Mail Transfer Protocol (SMTP) gateways. Because they are a very effective solution when used for web application functionality, NLB technology is a very effective solution for front-end access to Exchange Outlook Web Access and terminal servers maintaining Exchange client software.

NLB clusters can grow to 32 nodes, and if larger cluster farms are necessary, the Microsoft Application Center server can be considered as an option for server platform support, along with technologies such as domain name system (DNS) round-robin to meet larger client access demands.

NLB Modes and Port Configuration Overview

In Unicast mode, clients and servers maintain a one-to-one relationship when communicating. In Multicast mode, servers respond by broadcasting a single, multicast address, which clients attach to when accessing information such as websites.

Another option when configuring NLB with Outlook Web Access is the ability to define the ports in which NLB cluster members will respond to client requests. This option is effective for the scenario because administrators can restrict and allow access to ports such as Hypertext Transfer Protocol (HTTP) port 80 and Secure Sockets Layer (SSL) port 443.

NLB Network Card Configurations

One of the first steps when configuring NLB cluster nodes is the configuration of the NICs in each server. A configuration of network cards can be completed using the NLB Manager and the TCP/IP properties of each node’s network interface. One other option for configuring NICs is the command-line tool nlb.exe. This utility enables administrators to configure TCP/IP properties on NLB cluster nodes remotely and through the command line.

Configuring Network Load Balancing with Client Access Servers

Using the NLB Manager is the simplest method in configuring Client Access servers into a load-balanced cluster configuration. When using the Network Load Balancing Manager, all information regarding the NLB cluster and load-balancing TCP/IP addresses is added dynamically to each cluster node when configured. Using the NLB Manager also simplifies the tasks of adding and removing nodes by enabling administrators to use the NetBIOS name or TCP/IP address to identify nodes.

Tip

To effectively manage NLB clusters on remote servers, install and configure two NICs on the local NLB Manager system.

For more information regarding Network Load Balancing services with Windows Server 2003, go to http://www.microsoft.com/windowsserver2003/default.mspx.


In the following example, NLB services will be implemented to provide support with two separate Outlook Web Access servers. This scenario assumes that each Outlook Web Access server has already been installed and configured and is functioning.

To begin, configure the network cards for each Outlook Web Access system that you plan to configure in the NLB cluster:

1.
Log on to the local console of a cluster node using an account with local Administrator privileges.

2.
Select Start, Control Panel, and then double-click network connections.

3.
Right-click the network adapter icon for the network adapter device managing the NLB cluster interface and choose properties.

4.
Choose the Network Load Balance option and click the Properties button.

5.
Modify the properties by setting the binding for the appropriate cluster and dedicated IP addresses to each node’s network card; use the advanced pages accessed through the General tab of the TCP/IP property page.

Tip

It is a good practice to rename each network card so you can easily identify it when configuring interfaces and troubleshooting problems.


After the TCP/IP properties of the network card for the two OWA servers have been configured and tested, configure the NLB cluster by accessing the NLB Manager in the Administrative Tools of the Windows 2003 server. To begin, open the NLB Manager and complete the following steps:

1.
From the NLB Manager menu bar, click Cluster, and then click New.

2.
Enter the cluster IP address and subnet mask of the new cluster that will be used for both OWA servers’ cluster members, similar to what is shown in Figure 1.

Figure 1. Creating the NLB cluster.


a. Enter the fully qualified domain name for the cluster in the Full Internet Name text box.

b. Choose the Cluster Operation Mode (change the default to Multicast because this is a web functional configuration).

c. Configure a remote control password if you will be using the command-line utility (nlb.exe) to remotely manage the NLB cluster.

3.
Click Next to continue.

4.
Enter any additional TCP/IP addresses that will be load-balanced and click Next to continue.

5.
Configure the appropriate port rules for each IP address in the cluster. For CAS services being accessed from the Internet only, click the Edit tab and configure the port range to be 443, allowing HTTPS traffic between cluster NLB servers.

6.
On the Connect page, type the name of the server you want to add to the cluster in the Host text box, and click Connect. Review the server information and highlight the network interface to be used for the server; click Next to continue.

7.
On the Host Parameters page, set the cluster node priority. Each node requires a unique host priority, and because this is the first node in the cluster, leave the default of 1; click Finish when you are done.

Additional CAS servers can be added to the NLB cluster by repeating these steps at any time. Validate that the state of the clustered NLB system is listed in the NLB Manager as Started, and close the Manager to complete the configuration of additional servers.

Other -----------------
- Microsoft Exchange Server 2007 : Managing a Windows Server 2003 Cluster
- BizTalk Server 2009 : Editing and Resubmitting Suspended Messages (part 2) - Pseudo-Walkthrough to Perform Edits and Resubmits
- BizTalk Server 2009 : Editing and Resubmitting Suspended Messages (part 1) - Sample Flows for Edit and Resubmit
- BizTalk Server 2009 : Building a Resequencing Aggregator
- Windows Server 2003 on HP ProLiant Servers : Security Planning and Design (part 3) - Microsoft Software Update Service and Windows Update Service
- Windows Server 2003 on HP ProLiant Servers : Security Planning and Design (part 2) - Account Lockout
- Windows Server 2003 on HP ProLiant Servers : Security Planning and Design (part 1)
- Developing with SharePoint 2010 (part 4) - Developer Toolbar
- Developing with SharePoint 2010 (part 3) - Server Object Model
- Developing with SharePoint 2010 (part 2) - SharePoint Fundamentals
 
 
Top 10
- Microsoft Visio 2013 : Adding Structure to Your Diagrams - Finding containers and lists in Visio (part 2) - Wireframes,Legends
- Microsoft Visio 2013 : Adding Structure to Your Diagrams - Finding containers and lists in Visio (part 1) - Swimlanes
- Microsoft Visio 2013 : Adding Structure to Your Diagrams - Formatting and sizing lists
- Microsoft Visio 2013 : Adding Structure to Your Diagrams - Adding shapes to lists
- Microsoft Visio 2013 : Adding Structure to Your Diagrams - Sizing containers
- Microsoft Access 2010 : Control Properties and Why to Use Them (part 3) - The Other Properties of a Control
- Microsoft Access 2010 : Control Properties and Why to Use Them (part 2) - The Data Properties of a Control
- Microsoft Access 2010 : Control Properties and Why to Use Them (part 1) - The Format Properties of a Control
- Microsoft Access 2010 : Form Properties and Why Should You Use Them - Working with the Properties Window
- Microsoft Visio 2013 : Using the Organization Chart Wizard with new data
- First look: Apple Watch

- 3 Tips for Maintaining Your Cell Phone Battery (part 1)

- 3 Tips for Maintaining Your Cell Phone Battery (part 2)
programming4us programming4us
Popular tags
Microsoft Access Microsoft Excel Microsoft OneNote Microsoft PowerPoint Microsoft Project Microsoft Visio Microsoft Word Active Directory Biztalk Exchange Server Microsoft LynC Server Microsoft Dynamic Sharepoint Sql Server Windows Server 2008 Windows Server 2012 Windows 7 Windows 8 windows Phone 7 windows Phone 8
programming4us programming4us
 
programming4us
Natural Miscarriage
programming4us
Windows Vista
programming4us
Windows 7
programming4us
Windows Azure
programming4us
Windows Server
programming4us
Game Trailer