Cisco Systems 78-16019-02 manual Configuring CPU Switch Module Redundancy

Chapter 3 Initial Configuration

Configuring CPU Switch Module Redundancy

•The active CPU switch module fails. The standby CPU switch module takes over as the active CPU switch module, using the last synchronized running configuration file (or the last saved startup configuration file if the running configuration file synchronization was disabled or failed).

•A switchover is manually forced with the redundancy switch-activitycommand.

Configuring CPU Switch Module Redundancy

This section describes how to configure CPU switch module redundancy for your Cisco ONS 15530.

Note The initial default configuration will support CPU switch module redundancy and database synchronization with no manual configuration required.

Forcing a Switchover from Privileged EXEC Mode

You can manually force the standby CPU switch module to take over as the active CPU switch module from privileged EXEC mode. To force a switchover from privileged EXEC mode, enter the following command on the active CPU switch module CLI:

Command	Purpose
redundancy switch-activity [force]	Causes a CPU switch module switchover. If the
	standby CPU switch module has not reached the
	hot-standby software state, use the force option.

As long as you have not changed the default configuration register setting from autoboot, the standby CPU switch module (formerly the active CPU switch module) automatically boots until it reaches the hot-standby state.

Note Data transmission through the system is not affected by a CPU switch module switchover.

Example

The following example shows how to manually cause a CPU switch module switchover from privileged EXEC mode:

Switch# redundancy switch-activity

This will reload the active unit and force a switch of activity [confirm] y

Preparing to switch activity

00:12:05: %SYS-5-RELOAD: Reload requested <Information deleted>

	Cisco ONS 15530 Configuration Guide and Command Reference
78-16019-02, Cisco IOS Release 12.2(18)SV2		3-15