Foundry FastIron SuperX, Руководство по установке оборудования

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December 2008 © 2008 Foundry Networks, Inc. 6 - 1
Chapter 6
Using a Redundant Management Module
NOTE: This chapter applies to the FSX 800 and FSX 1600 chassis devices only.
You can install a redundant management module in the FSX 800 and FSX 1600 chassis. By default, the system
considers the module installed in the lower-numbered slot to be the active management module, and the module
installed in the higher-numbered slot to be the redundant or standby module. If the active module becomes
unavailable, the standby module automatically takes over management of the system.
This chapter describes the redundant management module, how it works with the active module, and how to
configure and manage it.
This chapter provides the following information:
• How management module redundancy works
• Optional management module redundancy configurations that you can perform
• Hitless management features (hitless Layer 2 switchover and hitless Layer 2 OS upgrade)
• How to manage and monitor the redundancy feature
How Management Module Redundancy Works
This section explains the following:
• How management module redundancy works under normal operating conditions.
• Events that cause a standby management module to assume the role of the active module and how the
switchover occurs as a result of each event.
• Implications that you should be aware of if a switchover occurs.
Management Module Redundancy Overview
When you power on or reload a FSX 800 or FSX 1600 chassis with two management modules installed, by
default, the management module installed in the lower-numbered slot becomes the active module and the
management module in the higher-numbered slot becomes the standby module. (You can change the default
active slot using the
set-active-mgmt command. For information about performing this task, see “Changing the
Default Active Chassis Slot” on page 6-4.)
After the active and standby modules are determined, both modules boot from the source specified for the active
module. The active management module boots from the active management module’s flash memory.