Implementation and application of Windows Server 2003 Network Load Balancing

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Load balancing is composed of multiple servers in a symmetrical way of a server set, each server has the equivalent status, can be provided to the external service alone without the assistance of other servers. Through some load-sharing technology, the externally sent requests are evenly distributed to one of the servers in the symmetric structure, and the server receiving the request responds independently to the customer's request. The balanced load can distribute customer requests to server arrays, which provides quick access to important data and solves a large number of concurrent access service problems. This clustering technology can gain access to the performance of a large host with minimal investment.

Advantages of Network Load Balancing

First, Network Load Balancing can propagate incoming requests to up to 32 servers, that is, you can use up to 32 servers to share external network request services. The Network Load Balancing technology ensures that the server can make fast response even under heavy load.

Second, the Network load balanced external only need to provide an IP address (or domain name);

Third, the service is not interrupted when one or more servers in the Network load balance are unavailable. Network Load Balancing automatically detects that the server is unavailable and can quickly reassign client traffic to the remaining servers. This protection can help you to provide uninterrupted service for critical business processes and increase the number of Network Load Balancing servers according to the increase of network traffic;

Finally, Network Load Balancing can be realized on ordinary computers.

The realization process of Network Load Balancing

In Windows Server 2003, Network Load Balancing applications include Internet Information Services (IIS), ISA Server 2000 firewall and proxy servers, VPN virtual private networks, terminal servers, Windows Media services ( Windows video-on-demand, video broadcast) and other services. At the same time, Network Load Balancing can help improve server performance and scalability to meet the growing demand for 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 retaining the respective names of each computer. Below, we will introduce the implementation and application of Network Load Balancing on two common computers with Windows Server 2003 installed.

On both computers, one computer name is A,IP address 192.168.0.7, and the other is named B,ip address 192.168.0.8. Planning Network Load Balancing dedicated virtual IP address is 192.168.0.9. When the formal application, the client only need to use IP address 192.168 0.9来 Access server, Network Service balance will be based on the load of each server automatically choose 192.168.0.7 or 192.168.0.8 external services. The specific implementation process is as follows:

On each computer that implements Network Load balancing, you can only install the TCP/IP protocol and do not install any other protocols (such as the IPX protocol or the NetBEUI Protocol), which is viewable from network connection properties.

The first step is to log in as an administrator to A and B machines, open the Local Area Connection property interface of two machines, check the load balancing entry in this connection using the following items and go to the Properties dialog box to set the IP address to 192.168.0.9 (that is, load-balanced dedicated IP). Set the subnet mask to 255.255.255.0;

In the second step, enter the "Internet Protocol (TCP/IP)" property setting interface of A and B, respectively, and after clicking the "Advanced" button, add the IP address 192.168.0.9 and subnet mask set to 255.255.255.0 in the "Advanced TCP/IP Settings" interface that pops up.

Step three, quit the local Connection Properties window on both computers, and wait for the system to complete the setup.

Later, if the two servers do not meet the requirements, you can add a third, fourth computer to the Network Load Balancing system to meet the requirements.