Chapter 7 Configuring Redundant Connections; Configuring Fault Tolerance - Cisco catalyst 6500 series Configuration Note

Configuring Redundant Connections
This chapter describes how to configure redundant connections and contains these sections:
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Configuring Fault Tolerance

This section describes a fault-tolerant configuration. In this configuration, two separate Catalyst 6500
series chassis each contain a CSM.
You can also create a fault-tolerant configuration with two CSMs in a single Catalyst 6500 series
Note
chassis. You also can create a fault-tolerant configuration in either the secure (router) mode or nonsecure
(bridge) mode.
In the secure (router) mode, the client-side and server-side VLANs provide the fault-tolerant (redundant)
connection paths between the CSM and the routers on the client side and the servers on the server side.
In a redundant configuration, two CSMs perform active and standby roles. Each CSM contains the same
IP, virtual server, server pool, and real server information. From the client-side and server-side networks,
each CSM is configured identically. The network sees the fault-tolerant configuration as a single CSM.
Note When you configure multiple fault-tolerant CSM pairs, do not configure multiple CSM pairs to use the
same FT VLAN. Use a different fault-tolerant VLAN for each fault-tolerant CSM pair.
Configuring fault tolerance requires the following:
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OL-4612-01
Configuring Fault Tolerance, page 7-1
Configuring HSRP, page 7-5
Configuring Connection Redundancy, page 7-8
Configuring a Hitless Upgrade, page 7-9
Two CSMs that are installed in the Catalyst 6500 series chassis.
Identically configured CSMs. One CSM is configured as the active; the other is configured as the
standby.
Each CSM connected to the same client-side and server-side VLANs.
Communication between the CSMs provided by a shared private VLAN.
A network that sees the redundant CSMs as a single entity.
C H A P T E R
Catalyst 6500 Series Content Switching Module Configuration Note
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