Extreme Networks Px Series - Manual (Page 16)

1-6 Px Series Application Switch Installation and Configuration Guide
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:
1 Configure the system IP and related information. For more information, see
Chapter 4.
2 Configure the appropriate global parameters such as NAT mode, proxy-IPs, and
stickiness options. For more information, see Chapter 6.
3 Configure the servers and virtual services: