HP ProCurve 6600 How the Management Modules Interact, Selftest, Switchover, Secondary Image

Redundancy (Switches 8200zl)

Overview

Secondary Image. The software version stored in secondary flash on each management module.

Selftest. A test performed at boot to ensure the management module is functioning correctly. If the module fails selftest, it does not go into active or standby mode. If both modules fail selftest, the switch does not boot.

Switchover. When the other management module becomes the active management module.

How the Management Modules Interact

When the switch boots up, the management modules run selftest to decide which is the active module and which is the standby module (see “Notes on How the Active Module is Determined” on page 15-44). The module that becomes active finishes booting and then brings up the interface modules and ports. The standby module boots to a certain point, syncs basic files such as the config and security files, and only finishes booting if the active management module fails or you choose to change which module is the active module.

The two management modules communicate by sending heartbeats back and forth. The active management module continuously synchronizes the configuration and security files with the standby module. If the active management module fails, the standby management module becomes the active module and finishes the boot process by reading the stored config file, resetting the interface modules, and bringing up the ports.

N o t e	The management module that becomes the “active” module will be the one
	that is booted going forward.

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