Extreme Networks Px Series manual Port Rewrite, Getting Started on Load Balancing Configuration

Port Rewrite

When a request is sent by a client to a VIP service, the request contains the well-known port number for the requested application. For example, the well-known port number for HTTP is port 80.

You can configure the application switch to rewrite the port, configuring a server group to use a specific port, other than the well-known port number for the application. Port rewrite is useful in instances where multiple domains are configured on the same server (or all servers in the same server group) and each domain has its own server process.

By giving each domain its own port number, each server process can be configured to listen for requests at its own port.

Getting Started on Load Balancing Configuration

To successfully configure the Px series application switch to perform load balancing operations, you must consider the following:

•Do you want to use full NAT or server-only NAT mode? For more information on NAT, see Chapter 6.

•Do you want to use IP address history? For more information on IP address history, see Chapter 6.

•What server selection policies do you want to use? For more information on selection policies, see Chapter 6.

•If URL switching is going to be implemented, what DNS domains and patterns will be used? For more information on URL switching, see Chapter 7.

•If cookies will be used, what cookie mode will be selected, and are the cookies configured properly on the web servers? For more information on cookies, see Chapter 6.

After these decisions have been made, follow these steps to configure load balancing:

1Configure the system IP and related information. For more information, see Chapter 4.

2Configure the appropriate global parameters such as NAT mode, proxy-IPs, and stickiness options. For more information, see Chapter 6.

3Configure the servers and virtual services:

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