Lucent Technologies 7820-0802-003 manual Resetting shelf controllers and clearing controller Nvram

Configuring Shelf-Controller Redundancy (APX 8000)

Configuring the APX 8000 for shelf-controller redundancy

Switching the primary controller at the command-line interface

You can manually switch primary shelf-controller functionality to the secondary controller by entering the command redundant-controller-switchat the command-line interface. This command causes the primary controller to give up bus (slot card) ownership and allow the other controller to become primary. The switchover to the secondary controller occur only if the secondary controller is present. After the bus is released, the old primary shelf controller reboots and assumes the role of secondary controller.

Switchover takes place only if the following conditions are met:

•The secondary controller is present.

•The primary controller currently controls the bus.

•The secondary controller requests control of the bus, which is the normal operating state of the secondary controller. The secondary controller is ready to automatically gain bus ownership whenever the primary releases its ownership.

After you use the redundant-controller-switchcommand, a prompt appears that asks for confirmation of your request. To switch primary controller functionality to the secondary controller without being prompted for confirmation, use the -fcommand option, as follows:

admin> redundant-controller-switch -f

When the command is entered on the primary controller, controller functionality is switched to the secondary controller. When the switchover command is entered on the secondary controller, no switchover occurs.

If the switchover command is entered on the primary when the secondary is not requesting control of the bus, no switchover occurs:

admin> redundant-controller-switch

The remote controller is not requesting the bus,

it cannot become PRIMARY!

If the switchover command is entered on the primary controller when only one controller is present, a notice is displayed:

admin> redundant-controller-switch

There is no remote controller!

Resetting shelf controllers and clearing controller NVRAM

The shelf controllers can be reset from the command line with the reset command. The controller’s NVRAM can be cleared from the command line with the nvram command. The use of these commands is described in this section.

Refer to the APX 8000/MAX TNT/DSLTNT Reference for additional information on the reset and nvram command-line interface commands and command options.

Resetting the controllers

The reset command resets one or both APX 8000 redundant shelf controllers. When you reset the unit, it restarts, and all active connections are terminated. All users are logged out, and

2-8 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide