HUAWEI NetEngine40E Universal ServiceRouter
Hardware Description
4 NE40E-X3 Chassis Overview
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Data configuration: The MPU stores configuration data, startup files, charging
information, upgrade software, and system logs.
Data storage: The MPU provides two interfaces for CF cards, which serve as mass
storage devices to store data files.
System Clock Unit
As the system clock unit, the MPU provides accurate and reliable SDH clock signals for
LPUs.
The MPU can provide two-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. In addition,
the MPU provides two time interfaces to support 1PPS+ASCII or 2 x DCLS time signals.
System Maintenance Unit
As the system maintenance unit, the MPU collects monitored information to test system units
locally or remotely, or implements in-service upgrading of system units.
The MPU periodically collects information about the operation of system units through the
Monitorbus. The MPU then generates related control information based on the collected
information, for example, the detection of board installations and adjustments to fan speed.
Through the joint test action group (JTAG) bus, the MPU remotely or locally tests system
units, or performs in-service upgrading of system units.
Reliability
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 takes over as the master MPU.
4.4.2 Main Processing Unit D2(CR5D0MPUD170)
Appearance
Figure 4-17 shows the appearance of the MPU.
Figure 4-17 Appearance of the MPU
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