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ME60 V800R010C10SPC500 Hardware Description

This is ME60 V800R010C10SPC500 Hardware Description
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Introduction to the Control Plane

Introduction to the Control Plane

This section describes the functions of the control plane.

The control plane of the ME60-X16A is separated from the data plane and the monitoring plane.

The MPU on the ME60-X16A is responsible for system control and management, including route calculation, device management and maintenance, and device monitoring.

System Control and Management Unit

As the system control and management unit, the MPU provides the following functions on the system control panel:

  • Route calculation: All routing protocol packets are sent by the forwarding engine to the MPU for processing. In addition, the MPU broadcasts and filters packets, and downloads routing policies from the policy server.

  • Outband communication between boards: The LAN switch modules integrated on the MPU provide outband communications between boards. In this manner, messages can be controlled, maintained, and exchanged between SFUs and LPUs.

  • Device management and maintenance: Devices can be managed and maintained through the management interfaces (serial interfaces) provided by the MPU.

  • Data configuration: The MPU stores configuration data, startup files, charging information, upgrade software, and system logs.

System Clock Unit

As the system clock unit, the MPU provides accurate and reliable SDH clock signals for LPUs. The MPU can provide three-channel 2.048 MHz synchronous clock signals for the downstream devices, or receive 2.048 MHz or 2.048 Mbit/s external reference clock signals.

To support IEEE 1588v2, that is, the Precision Time Protocol (PTP), the SDH clock interface can input time information in multiple formats by selecting specific software.

System Maintenance Unit

As the system maintenance unit, the MPU collects monitored information to test system units locally or remotely or perform in-service upgrades on system units.

The MPU periodically collects information about the operation of system units through the monitor bus. The MPU then generates related control information based on the collected information, for example, information collected by detecting board installations and adjusting fan speed. Through the joint test action group (JTAG) bus, the MPU remotely or locally tests system units or performs in-service upgrades on system units.


The main control modules, clock modules, and LAN switch modules on the MPU work in 1:1 hot backup mode, thus improving system reliability.

The two MPUs work in 1:1 backup mode. Each MPU monitors the status of the other. If the master MPU is faulty, the slave MPU automatically becomes the master MPU.

Updated: 2019-01-04

Document ID: EDOC1100059474

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