Control Plane; Introduction To The Control Plane - Huawei NE40E-X1 Hardware Description

HUAWEI NE40E-X1 & NE40E-X2 Universal Service
Router
Hardware Description
Indicator/
Button
L/A0
indicator
L/A1
indicator

1.5 Control Plane

1.5.1 Introduction to the Control Plane

The function of control plane is implemented by the MPU.
The device can be equipped with a single MPU or double MPUs (in backup mode).
In the case of double MPUs, the master MPU works and the slave MPU is in the standby state.
You cannot access the management network interface on the slave MPU or run commands on
the console or AUX interface. The slave MPU exchanges information (heartbeat messages and
backup data) with only the master MPU. Data consistency between the master and slave MPUs
is ensured through high reliability mechanisms such as batch backup and real-time backup. After
the master-slave switchover, the slave MPU immediately takes over as the master MPU. The
default master MPU is configurable. During the start process, the MPU that you set wins the
competition and becomes the master MPU.
MPUs support two switchover modes: failover and manual switchover. The failover is triggered
by serious faults or resetting of the master MPU. The manual switchover is triggered by
commands run on the console interface or management interface.
The MPU integrates multiple functional units. By integrating the system control and
management unit, clock unit, and system maintenance unit, the MPU provides the functions of
the control plane and maintenance plane. The functions of the MPU are detailed as follows:
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Issue 02 (2011-09-10)
Description
If the indicator is steady green, it indicates that the corresponding link is Up.
If the indicator blinks green, it indicates that data is being transmitted.
If the indicator is off, it indicates that the corresponding link is Down.
If the indicator is steady green, it indicates that the corresponding link is Up.
If the indicator blinks green, it indicates that data is being transmitted.
If the indicator is off, it indicates that the corresponding link is Down.
System control and management unit
The MPU is mainly responsible for processing routing protocols. In addition, the MPU
broadcasts and filters routing packets, downloads routing policies from the policy server.
The MPU manages the NPUs and communicates with the NPUs. The MPU implements
outband communication between boards. The MPU manages and carries out
communication between the NPUs and slave MPU through the outband management bus.
The MPU is also responsible for data management. The system configuration data, booting
file, upgrade software, and system logs are stored on the MPU. The Compact Flash (CF)
card on the MPU functions as a mass storage device for saving data files including system
files, configuration files, and logs, and is not hot-swappable.
The MPU manages and maintains the device. Through management interfaces such as serial
interfaces and network interfaces on the MPU, you can manage and maintain the device.
System clock unit
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