Configuring Windows Network Load Balancing

Network Load Balancing (NLB) is commonly utilized with Web
Applications and SharePoint deployments to load balance the web traffic across
multiple servers and to increase the availability of the solution. The most
common SharePoint 2007 deployment is the 5-server farm which includes 2
SharePoint Front End servers that are load balanced.

Load balancing web servers can happen through different
options using hardware and software, and Windows 2008 NLB is one of these

WFE1: First Web Server

WFE2: Second Web Server

Following is a step by step guide on how to deploy and
configure a load balancing cluster:

Installing Network Load
balancing tool

On the first web server
(WFE1) , open Server Manager from Administration tools

Left click on Features and
the Left click on Add Feature

Select Network Load
Balancing and click next and then Install to finish the wizard

Repeat these steps on the
second web server (WFE2).

Launch  Network Load balancing Manager from All
Programs – Administrative Tools on WFE1

In the manager Right Click
on Network Load Balancer Cluster and Click New Cluster

Enter IP address of first
server to be in the cluster. Click connect and choose the network card that is
connected to the domain

Leave defaults and click

Click Add. Enter Virtual IP
address and subnet mask for your NLB Cluster (Note that this is the new IP that
you want to be assigned to your cluster)

Click Next

Enter internet name. Choose
Unicast if you have multiple network adapters or multicast if you have
single network adapter on your webserver

On Port Rules page, delete
existing rule can click add to create a new rule

Set the Rule to Port 80
using Both UDP & TCP Protocols. Note to set the affinity to single. Click
OK. Click Finish.

Once complete, you will see
a green background icon next to server name

Now we will add the second
web server to the cluster. Right click on domain name and select ‘Add host to cluster’

Enter IP address of second
web server to be added to the cluster. Click connect and choose the network
card that is connected to the domain.

Accept defaults and click

Click finish and wait till
the second server converges


Now you have the servers network load balanced and can
create a DNS entry that points to your NLB IP.

Comments (4)

  1. quite helpful article, thanks for sharing

  2. Saurin Thakkar says:

    Very informative. Nice article

  3. Kishore says:

    Thanks a lot for sharing with us!!!!!!!

  4. gk says:

    it should be step by step configurations, will help new learners. which DNS entry should modify. if i have 10 web applications which method should used and how