Huawei CR-SRUB Manuel utilisateur

Quidway® NetEngine 40 Series Universal Switching Router Route Switching Units

http://www.huawei.com/products/datacomm/ 1

Quidway® NetEngine 40 Series Universal

Switching Router Route Switching Units

Overview

The Route Switching Unit (SRU) is the core of the Quidway® NetEngine 40 universal

switching router (USR) series (abbreviated as NE40).

NE40-8 and NE40-4 provide 2 slots, where one or two SRUs can be located. It is suggested

that you configure two SRUs in order to implement SRU redundancy and enhance system

reliability. NE40-2 has only one SRU slot, so it does not support SRU redundancy.

CR-SRUB

CR-SRUE

When the active SRU runs normally, the standby one is backing up such information in real

time as data configuration and status of slot, board, interface, power, fan and protocol. When

the active SRU is seriously faulty or is reset manually, the system restores services on the

standby one (automatically or by command). Meanwhile, it generates an alarm and records

the switchover cause and process in the log file which will be notified to the NMS.

Quidway® NetEngine 40 Series Universal Switching Router Route Switching Units

http://www.huawei.com/products/datacomm/ 2

The SRU consists of main processing unit (MPU), switching fabric unit (Fabric) and clock

module (CLK). As the core of system control and management, SRU also serves as system

clock source and maintenance and management unit. It implements the functions of the

control plane, switching plane and system maintenance plane.

Below follows a description of functions.

I. MPU

zProcess routing protocols, generate and sent forwarding tables to line

boards.

zConduct system management and performance monitoring as commanded

and feed back the information of system running to the operator.

zMonitor and maintain the running of LPU.

zMonitor and maintain the running of Fabric and CLK.

zMonitor the running of the fan system and power system.

II. Fabric

zSupport non-blocking and automatic routing data exchange.

zSupport dynamic sharing of output buffer.

zSupport multi-priority switching.

zSupport multicast switching.

zSupport hardware flow control and back pressure.

zThe temperature sensor tests the temperature of the SRU. It can also collect

and report temperature information and generate related alarms.

III. CLK

zProvide a standard level-3 synchronization clock with the clock reference

source (2048 Kbit/s or 2048 KHz).

zSupport clock priority.

zHave four working modes: fast tracking, normal (tracking), hold and free-run.

zHave rough tune and fine tune function, realizing on-site frequency

adjustment.

zEnable synchronization performance detection, alarming and control.

Specifications

At present, the NE40 provides three types of SRUs, including CR-SRUB, CR-SRUC and

CR-SRUE.

Compared with first-generation SRUs of CR-SRUB and CR-SRUC, CR-SRUE demonstrates

much better performance. CR-SRUB and CR-SRUE are applicable to NE40-8, NE40-4 and

NE40-2, while the CR-SRUC is only applicable to NE40-2.

In addition, the CR-SRUE provides 10/100/1000 Mbps Ethernet interface while CR-SRUB and

CR-SRUC provide 10/100 Mbps Ethernet interface.

Quidway® NetEngine 40 Series Universal Switching Router Route Switching Units

http://www.huawei.com/products/datacomm/ 3

Refer to the table below for details.

Module

name

Interface

name Interface

type Description

Ethernet

port RJ45

Connect the NM station. This interface is

10/100 Mbps adaptive and supports a

maximum transmission distance of 100m. It

is configured with LINK and ACT indicators.

CONSOLE

port RJ45

It is of RS-232 level and used to connect

with the console for onsite configuration,

maintenance, management and upgrade of

system.

AUX port RJ45

It is of RS-232 level and used to connect

with the Modem for remote configuration,

maintenance and management by means of

dialing.

CLK-IN1

CLK-IN2 SMB Receive 2.048 MHz or 2.048 Mbps clock

signals.

CLK-OUT1

CR-SRUB/

CR-SRUC

CLK-OUT2 SMB Send 2.048 MHz or 2.048 Mbps clock

signals to downstream devices.

Ethernet

port RJ45

Connect the NM station. It is 10/100/1000

Mbps adaptive and supports a maximum

transmission distance of 100m. It is

configured with LINK and ACT indicators.

CONSOLE

port RJ45

It is of RS-232 level and used to connect

with the console for onsite configuration,

maintenance, management and upgrade of

system.

AUX port RJ45

It is of RS-232 level and used to connect

with the Modem for remote configuration,

maintenance and management by means of

dialing.

CLK-IN1

CLK-IN2 SMB Receive 2.048 MHz or 2.048 Mbps clock

signals.

CR-SRUE

CLK-OUT1 SMB Send 2.048 MHz or 2.048 Mbps clock

Quidway® NetEngine 40 Series Universal Switching Router Route Switching Units

http://www.huawei.com/products/datacomm/ 4

Module

name

Interface

name Interface

type Description

CLK-OUT2 signals to downstream devices.

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