Work mode of active and standby MPUs on S series switches

MPU is a mandatory card for switches. Each switch must be configured with one or two MPUs. When only one MPU is configured for a switch, the MPU can be installed in either MPU slot of the switch. When two MPUs are configured, they work in hot standby mode to improve system reliability. The two MPUs monitor each other. If the active MPU fails, the standby MPU changes to active state to ensure non-stop services.

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