Implementation of Network Load Balancing for Windows 2003 System

In many current network applications, sometimes a server often cannot meet the requirements of the client. At this time, the problem can only be solved by adding a server.

So, is there a way or technique to solve this kind of problem? You can use Network Load Balancing cluster in Windows 2000 or Windows Server 2003 (this article will introduce the network load balancing technology in Windows Server 2003). Implementation).

First, the advantages of network load balancing

1. Network load balancing allows you to propagate incoming requests to up to 32 servers, that is, you can use up to 32 servers to share External network request service. Network load balancing technology ensures that they respond quickly even under heavy load conditions.

2. Network load balancing only needs to provide an IP address (or domain name).

3. If one or several servers in network load balancing are not available, the service will not be interrupted. Network Load Balancing automatically detects that the server is not available and can quickly reassign client communications to the remaining servers. This protection can help you provide uninterrupted service for critical business processes. You can increase the number of network load balancing servers based on the increase in network traffic.

4. Network load balancing can be implemented on a normal computer.

In Windows Server 2003, network load balancing applications include Internet Information Services (IIS), ISA Server 2000 Firewall and Proxy Server, VPN Virtual Private Network, Terminal Server, Windows Media Services (Windows Video on Demand, Video broadcast) and other services. At the same time, network load balancing can help improve your server's performance and scalability to meet the growing needs of Internet-based clients.

Network Load Balancing allows clients to access the cluster with a logical Internet name and virtual IP address (also known as a cluster IP address) while preserving the name of each computer.

Below, we will introduce the implementation and application of network load balancing on two ordinary computers with Windows Server 2003 installed. Second, the implementation of network load balancing

Of the two computers, one computer name is w2003-1, the IP address is 202.206.197.190, the other is named w2003-2, and the IP address is 202.206.197.191 .

Plan the network load balancing cluster to use the IP address 202.206.197.195, and plan the network load balancing cluster. The complete computer name is cluster.heinfo.edu.cn. You need to register in the heinfo.edu.cn domain. This host name and the address is set to 202.206.197.195. If you do not have DNS, you can edit the hosts in the %systemroot%"system32"drivers" etc directory on clients that need to access network load balancing (including network load balancing hosts). File, add a message < 202.206.197.195 cluster.heinfo.edu.cn & rdquo;, you can solve the problem of DNS domain name resolution.

When officially applied, the client only needs to use cluster.heinfo.edu.cn or IP address 202.206.197.195 to access the server. Network service balance will automatically select 202.206.197.190 according to the load of each server. 202.206.197.191 provides external services.

The process of network load balancing is as follows:

On each computer that implements network load balancing, you can only install TCP/IP protocol, and do not install any other protocols (such as IPX protocol). Or NetBEUI protocol), in the network properties, "Network Load Balancing" can not be selected, which can be viewed from the "Network Connection Properties".

1 first enter the first computer, log in as an administrator, run from “Administrative Tools">;Network Load Balancing Manager", right-click "Network Load Balancing Cluster ”, select “New Cluster> from the menu that appears, go to the “Cluster Parameters” interface.

Enter the planned cluster parameter address 202.206.197.195 after “IP address", use the default value at the subnet mask, and enter cluster.heinfo.edu after "full Internet name". Cn (may be another name, but the entered DNS name must match the entered IP address).

If remote control is allowed, check "Allow remote control" and enter a password that can be remotely controlled at "Remote Password" and "Confirm Password".

2 Click the “Next” button to enter the cluster IP address page and then enter the “Port Rules” interface. Click the “Next” button to enter the “Connect” interface.

3Enter the current computer name w2003-1 in the "Host" column of the "Connection" dialog box, and then click the "Connect" button to configure a new cluster in the "Host" pair. The Available Interfaces box shows the network card and IP address of the connected computer. Select the address of the same network segment as the cluster IP address (for the network card that provides external network applications), and then click the “Next” button to enter the “Host Parameters” interface. Click the “Complete” button. The configuration of the Network Load Balancing cluster will start automatically. After a few minutes, the Network Load Balancing cluster configuration is complete.

4Open the second computer and log in as an administrator.

Note: On each node in Network Load Balancing, the username and password of the administrator account are preferably the same.

5 Then, on the first computer, right-click on the newly created cluster and select “Add Host to Cluster” from the menu that appears. The “Connection” interface will appear, enter the computer name of the second computer in “Host”, click the “Connect” button, and the connection will be displayed under “The interface available to the configuration cluster”. Network configuration on your computer. Select the network card of 202.206.197.191, enter the host parameter interface, click the “Complete” button to return to the Network Load Balancing Manager.

6Turn off the Network Load Balancing Manager before entering the Network Load Balancing Manager. Right-click on “Network Load Balancing Cluster” and select “Connect to Existing” from the menu that appears, and the “Connections” interface will pop up.

Enter the name of the first computer, click the “link” button, and the cluster's IP address will be listed under "Cluster", select this IP address, and click the “Complete” button , connect to the cluster to complete.

In the future, if the two servers cannot meet the demand, you can add the third and fourth computers to the network load balancing according to the above steps to meet the requirements.
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