Layer 7 Load-Balancing Example - Cisco ACE-4710-K9 Administration Manual

Chapter 4 Configuring Class Maps and Policy Maps

Layer 7 Load-Balancing Example

Step 1
Step 2
Step 3
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This example shows how to create a Layer 7 load-balancing traffic policy that
enables the following processes to occur on the ACE:
Load balances traffic to the SPORTS-SERVER and NEWS-SERVER server
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farms based on the following criteria:
HTTP header and header value expression
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URL expression
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Classifies the 3-tuple flow of the VIP address, protocol, and port as matching
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criteria for server load balancing
Utilizes an HTTP parameter map to enable HTTP persistence
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Perform the following steps:
Create a Layer 7 class map that defines an HTTP header and header value
expression string and URL expression for load balancing to the
SPORTS-SERVER server farm.
host1/Admin(config)# class-map type http loadbalance match-all
SPORTS-MAP_CLASS
host1/Admin(config-cmap-http-lb)# match http header host header-value
.*test.com
host1/Admin(config-cmap-http-lb)# match http url /sports/
host1/Admin(config-cmap-http-lb)# exit
Create a Layer 7 class map that defines a URL expression for load balancing to
the NEWS-SERVER serverfarm.
host1/Admin(config)# class-map type http loadbalance NEWS-MAP_CLASS
host1/Admin(config-cmap-http-lb)# match http url /news/
host1/Admin(config-cmap-http-lb)# exit
Create a Layer 7 server load-balancing policy by entering the following
commands:
host1/Admin(config)# policy-map type loadbalance first-match
L7_SLB_POLICY
host1/Admin(config-pmap-lb)# class SPORTS-MAP_CLASS
host1/Admin(config-pmap-lb-c)# serverfarm SPORTS-SERVER
host1/Admin(config-pmap-lb-c)# exit
host1/Admin(config-pmap-lb)# class NEWS-MAP_CLASS
host1/Admin(config-pmap-lb-c)# serverfarm NEWS-SERVER
host1/Admin(config-pmap-lb-c)# exit
Cisco 4700 Series Application Control Engine Appliance Administration Guide
Class Maps and Policy Map Examples
4-63