User's Manual

Chapter 1
13 Avaya P330 Load Balancing Manager User Guide
Combination of Applications
You can enable the P333R-LB to use various applications concurrently.
For example, it is possible to configure the same P333R-LB to perform
Server Load balancing for an Intranet web-server, Application
Redirection for web traffic that is Internet-bound, and Firewall Load
Balancing for traffic that is Internet-bound.
In some cases, the same “type” of traffic can be given two different
actions by the load balancer. In these situations, it is necessary to tell the
load balancer which action to choose. In the example described above,
web traffic to the intranet server can be configured to either be directed
to the web cache, or bypass the web cache and directly access the
Intranet server. The latter configuration will save the web cache
resources to deal with Internet-bound traffic.
You can specify the preferred action as one of the following:
• Configure SLB to take precedence over AR.
• AR can take precedence over SLB.
• Configure AR filters to redirect traffic from client/server
addresses, using wildcards.
• Configure AR filters to specify which traffic not to redirect
(“no-ar” as service) from specific client/server addresses, using
wildcards.
Load Balancing Metrics
There are several methods, or metrics, that a load balancer can use to
distribute traffic among multiple servers, firewalls or caches. These
metrics tell the load balancer which Real Server should receive each
session.
Some commonly used metrics are:
• Round Robin
• Hash
• MinMiss Hash
• Weighted Real Servers