Chapter 4      Managing Devices

Understanding Redundancy Support

Expected Behaviors for Redundant Devices

What should you expect when using redundant devices in the Hosting Solution 

Engine? 

If a redundant unit is not available, no action can be performed on either device 

pair. Every action is performed on both pairs or neither pair.

The Hosting Solution Engine cannot synchronize device configurations.

Related Topics

Device Name Display in Configure Tab, page 5 6

Understanding CSM Redundancy, page 4 43

Understanding CSS Redundancy, page 4 42

Understanding CSS Redundancy

The CSS redundancy protocol provides chassis level redundancy between two 

CSSs. This feature protects the network and ensures that users have continuous 

access to servers and content.

The Hosting Solution Engine supports the following features:

CSS

 box to box redundancy where a crossover cable connects the master and 

backup CSS interfaces. This requires a management interface to be 

configured on both the master and backup CSS devices.

Virtual IP (VIP) and virtual interface redundancy Provides redundant VIP 

addresses and redundant virtual interfaces for fate sharing (the redundant 

interfaces and redundant VIPs fail over together to the backup CSS) and 

server default gateways.

Release 1.8 does not support configuration of CSS Adaptive Session 

Redundancy.

Note

See the installation documentation or your online help for instructions on setting 

up your network devices. See the Device Manager online help for instructions on 

how to set up device redundancy for the CSS. The redundancy will appear only 

after completing these steps.

User Guide for the CiscoWorks Hosting Solution Engine 1.8.1

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