WebLogic Server provides failover within MAN and WAN networks. This feature provides more reliability by allowing failover to occur across a larger geographic area. It also provides failover across multiple WebLogic Server domains.
To provide failover within a MAN/WAN environment, you must use hardware load balancers. This document outlines the procedures for configuring Radware hardware load balancers to work with WebLogic Server.
For information on configuring WebLogic Server to use MAN/WAN, see Session State Replication Across Clusters in a MAN/WAN. For information on configuring Radware hardware load balancers, see http://www.radware.com
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Before configuring your load balancers to work within a MAN/WAN environment, you must have performed certain prequisite steps.
Installed and configured your WebLogic Server environment. This includes creating and configuring clusters and Managed Servers.
Installed and configured at least two Radware Web Server Director load balancers. This is the minimum hardware requirement for using Radware devices within a MAN/WAN environment. At least one of these must be configured as a global load balancer
Ensured that your network and DNS are configured correctly
The first step in configuring Web Server Director is to create an Authoritative Delegation Zone within the local DNS.
To do this, perform the following using the Radware administration utility:
Web Server Director balances load among servers within a server farm.
Clients access a server using a virtual IP address. Web Server Director directs traffic from this virtual IP address to the appropriate server. The following sections describe how to create and configure server farm virtual IPs.
To create a farm IP, perform the following using the Radware administration utility:
To configure the dispatch method for the server farm, perform the following procedures using the Radware configuration utility:
Use the following procedures to configure port multiplexing:
You must configure HTTP redirects in order to configure global load balancers to work within a MAN/WAN environment. HTTP redirects ensure proper distribution of traffic across Web Server Director devices.
To configure HTTP redirect, perform the following procedures using the Radware administration utility:
Server persistence is based on HTTP session IDs. Web Server Director inspects incoming traffic to a farm, then selects the appropriate server based on session information in the HTTP header.
To configure session ID persistency, perform the following procedures using the Radware administration utility:
JESESSIONID
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.Inactivity Timeout
to the value of your session time-out.Configuring the LRP component ensures that traffic is correctly distributed to remote locations.
To configure LRP, perform the following:
After you have configured your Radware devices, you must configure WebLogic Server to use MAN/WAN failover.
For information on configuring WebLogic Server to use MAN/WAN, see Session State Replication Across Clusters in a MAN/WAN.