Control Plane; Introduction To The Control Plane - Huawei Eudemon8000E Series Manual

HUAWEI Eudemon8000E Firewall
Hardware Description

4.8 Control Plane

This chapter describes the control plane of the E8000E-X3.

4.8.1 Introduction to the Control Plane

This section describes the functions of the control plane.
E8000E-X3 uses the MPUD to implement the functions of the control plane. The functions
include centralized control and management and data exchange. Two MPUDs are used to
provide 1:1 backup. The MPU consists of the main control unit, switching unit, system clock
unit, synchronous clock unit, and system maintenance unit. The functions of the MPU are
described from the following aspects:
System Control and Management Unit
As the system control and management unit, the MPU provides the following functions on the
system control panel:
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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.
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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, communications
between MPUs, LPUs, and SFUs are controlled and maintained, and messages can be
exchanged.
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.
Data storage: The MPU provides two interfaces for CF cards, which serve as mass storage
devices to store data files.
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4 E8000E-X3 Chassis Overview
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