Cisco Systems 6000 manual Fault-tolerant configuration, the following rules apply

Configuration Examples

In the fault-tolerant configuration, the following rules apply:

Configuration Parameter	On Both Content Switching Modules
	Same	Different
VLAN name	X
VLAN address		X
Gateway1 address	X
Virtual server name	X
Virtual IP address	X
Alias IP addresses	X
Redundancy group name	X
Redundancy VLAN ID	X

1. Server default gateways must point to the alias IP address.

Because each CSM has a different IP address on the client- and server-side VLAN, the CSM can issue health monitor probes (see the “Configuring Probes for Health Monitoring” section on page 46 for health monitoring information) to the network and receive responses. Both the primary and secondary CSMs send probes while operational. In the event that the passive CSM assumes control, it knows the status of the servers because of the probe responses it has received.

Enter the backup or no backup commands in the ip slb ft configuration mode to enable or disable sticky connection backup for the CSMs. Configuring fault-tolerant sticky connections requires the following:

•Specifying the server farm for which you are establishing fault-tolerant sticky connections using the ip slb serverfarm command.

•Enabling the fault-tolerant sticky connections while in the server farm submode.

If no router is present on the server-side VLAN, then each server’s default route points to the aliased IP address.

Figure 12 shows how the secure (router) mode fault-tolerant configuration is set up.

	Catalyst 6000 Family Content Switching Module Installation and Configuration Note
40	78-11631-02 Rev. A0