Huawei NetEngine40E Hardware Description

HUAWEI NetEngine40E Universal ServiceRouter
Hardware Description
3 NE40E-X8 Chassis Overview
Issue 01 (2012-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
60
System Control and Management Unit
As the system control and management unit, the SRU provides the following functions on the
system control panel:

Route calculation: All routing protocol packets are sent by the forwarding engine to the
SRU for processing. In addition, the SRU broadcasts and filters packets, and downloads
routing policies from the policy server.

Outband communication between boards: The LAN switch modules integrated on the
SRU provide outband communications between boards. In this manner, messages can be
controlled, maintained, and exchanged between the boards.

Device management and maintenance: Devices can be managed and maintained through
the management interfaces (serial interfaces) provided by the SRU.

Data configuration: The SRU stores configuration data, startup files, charging
information, upgrade software, and system logs.

Data storage: The SRU 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 SRU provides accurate and reliable SDH clock signals for LPUs.
The SRU 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 SRU collects system monitoring information to test
system units locally or remotely, or implement in-service upgrading of system units.
The SRU periodically collects information about the operation of system units through the
Monitorbus. The SRU 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 SRU 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 SRU work in 1:1
hot backup mode, thus improving system reliability.
The two SRUs work in 1:1 backup mode. Each SRU monitors the status of the other. If the
master SRU is faulty, the slave SRU automatically takes over as the master SRU.
3.5.2 Switch and Route Processing Unit A7
Switch and Route Processing Unit A7 is the 100G Switch and Route Processing Unit
Appearance
Figure 3-21 shows appearance of the CR5D0SRUA770 .

Huawei NetEngine40E Specifications

General

Brand	Huawei
Model	NetEngine40E
Category	Network Router
Language	English