Using Redundantm; Configuration Considerations; Temperature Sensor; Switchover - HP 9304m Installation And Getting Started Manual

This chapter describes the redundant management modules and how to configure and manage them. Redundant
management modules provide increased routing capacity and failover for HP 9304M, HP 9308M, or HP 9315M
Chassis devices.
See the following sections for information:
• "Configuring the Redundant Management Parameters" on page 3-3
• "File Synchronization Between the Active and Standby Redundant Management Modules" on page 3-10
• "Switching Over to the Standby Redundant Management Module" on page 3-15
The redundant management modules are fully-functional CPU management modules for Chassis devices. You
can use one or two redundant management modules in these devices.
You can use one or two redundant management modules in a Chassis device. Using two redundant management
modules adds fault protection against system outage. The two modules work together as active and standby
management modules. If the active module becomes unavailable, the standby module automatically takes over
system operation.

Configuration Considerations

• The Management Modules II and IV support redundancy.
• You can use one or two redundant management modules in a Chassis device.
• You cannot use older management modules in the same Chassis device with redundant management
modules.

Temperature Sensor

The redundant management modules contain a temperature sensor. You can use the CLI or Web management
interface to display the active redundant management module's temperature and to change the warning and
shutdown temperature levels. See "Using the Temperature Sensor" on page 4-44.

Switchover

When you power on or reload a Chassis device that contains two redundant management modules, the active
redundant management module is selected based on the chassis slot previously specified by you or according to
the lower slot number.
Using Redundant Management Modules
Chapter 3
3 - 1