Cisco catalyst 6500 series Configuration Note page 40

Preparing to Configure the CSM
Before you can configure server load balancing, you must obtain the following information:
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Configure VLANs on the Catalyst 6500 series switch before you configure VLANs for the CSM.
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VLAN IDs must be the same for the switch and the module. Refer to the Catalyst 6500 Series
Software Configuration Guide for details.
This example shows how to configure VLANs:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)# vlan 130
Router(config-vlan)# name CLIENT_VLAN
Router(config-vlan)# exit
Router(config)# vlan 150
Router(config-vlan)# name SERVER_VLAN
Router(config-vlan)# end
• Place physical interfaces that connect to the servers or to the clients in the corresponding VLAN.
This example shows how to configure a physical interface as a Layer 2 interface and assign it to a
VLAN:
Router>
Router> enable
Router# config
Router(config)# interface 3/1
Router(config-if)# switchport
Router(config-if)# switchport access vlan 150
Router(config-if)# no shutdown
Router(vlan)# exit
• If the Multilayer Switch Function Card (MSFC) is used on the next-hop router on either the client
or the server-side VLAN, then you must configure the corresponding Layer 3 VLAN interface.
You cannot use the MSFC simultaneously as the router for both the client and the server side unless
Caution
policy-based routing or source NAT is used and the CSM is configured in router mode. This situation
occurs because the CSM must see both flow directions it load balances or forwards. If you use the
CSM in bridge (single subnet) mode, do not configure the Layer 3 VLAN interface on the MSFC
for both the client and the server side. If you use the CSM in router mode, do not configure the Layer
3 VLAN interface on the MSFC for both the client and the server side unless you properly configure
policy-based routing or source NAT to direct return traffic back to the CSM.
This example shows how to configure the Layer 3 VLAN interface:
Router>
Router> enable
Router# config
Router(config)# interface vlan 130
Router(config-if)# ip address 10.10.1.10 255.255.255.0
Router(config-if)# no shutdown
Router(vlan)# exit
Catalyst 6500 Series Content Switching Module Configuration Note
3-2
Network topology that you are using in your installation
Real server IP addresses
An entry for the CSM VIPs in the Domain Name Server (DNS) (if you want them to be reached
through names)
Each virtual server's IP address
Chapter 3
End with CNTL/Z.
Getting Started
OL-4612-01