8-10
Catalyst 6500 Series Content Switching Module Configuration Note
OL-4612-01
Chapter 8 Configuring Additional Features and Options
Configuring Global Server Load Balancing
Figure 8-1 Global Server Load Balancing Configuration
In this configuration illustration, the following guidelines apply to the configuration task and example:
• CSM 1 does both GSLB and SLB, while CSM 2 and CSM 3 only do SLB.
• CSM 1 has both a virtual server for SLB where the real servers in the server farm are the IP addresses
of the local servers and a virtual server for GSLB.
• The DNS policy uses a primary server farm where one of the real servers is local and the other two
real servers are virtual servers configured on CSM 2 and CSM 3, respectively.
• Probes should be added for both the remote locations and the local real and virtual server.
• DNS requests sent to a CSM 1 management IP address (a CSM 1 VLAN address or alias IP) will
receive as a response one of the three real server IPs configured in the server farm GSLBFARM.
To configure GSLB, perform these tasks:
Command Purpose
Step 1
Router(config-slb-vserver)#
serverfarm
serverfarm-name
Creates a server farm to associate with the virtual server.
Step 2
Router(config-module-csm)#
vserver
virtserver-name
Identifies a virtual server for SLB on CSM 1, and enters the
virtual server submode.
Step 3
Router(config-slb-vserver)#
virtual
ip-address
[
ip-mask
]
protocol
port-number
[service
ftp]
Configures the virtual server attributes.
Step 4
Router(config-slb-vserver)#
inservice
Enables the virtual server for load balancing.
Step 5
Router(config-module-csm)#
vserver
virtserver-name
dns
Identifies a virtual server for GSLB, and enters the virtual server
submode.
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