H3C MSR-20-21 ROUTER Installation guide

H3C MSR 20 Series Routers

Installation Manual

Hangzhou H3C Technologies Co., Ltd.

http://www.h3c.com

Manual Version: T2-08047K-20081106-C-1.03

No part of this manual may be reproduced or transmitted in any form or by any means without prior

written consent of Hangzhou H3C Technologies Co., Ltd.

Trademarks

H3C, , Aolynk, , H

3

Care,

, TOP G, , IRF, NetPilot, Neocean, NeoVTL,

SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V

2

G, V

n

G, PSPT,

XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co.,

Ltd.

All other trademarks that may be mentioned in this manual are the property of their respective owners.

Notice

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Technical Support

customer_service@h3c.com

http://www.h3c.com

About This Manual

Organization

MSR 20 Series Routers Installation Manual is organized as follows:

Chapter Contents

1 Overview

Briefly introduces the appearance, system description, as well as

the features and applications of the MSR 20 series.

2 Installation Preparation

Describes the requirements on installation site, the safety

recommendations before and during installation, and the required

tools.

3. Installation

Covers the procedures for installing the MSR 20 series, power cord

connection, AUX cable connection, Console cable connection,

Ethernet cable connection and Synchronous/asynchronous serial

interface cable connection.

4. Startup and Configuration

Helps you get familiar with the basic knowledge of how to boot and

configure the MSR 20 series, including device startup, power-on,

and initialization of system files, and so on.

5. Software Maintenance

Introduces how to maintain BootROM menu and software of the

MSR 20 series.

6. Hardware Maintenance

Introduces how to install and remove SDRAM, ESM/VCPM card

and CF card of the MSR 20 series.

7. Troubleshooting Describes some problems that may arise and how to solve them.

Conventions

The manual uses the following conventions:

Command conventions

Convention Description

Boldface

The keywords of a command line are in Boldface.

italic

Command arguments are in italic.

[ ] Items (keywords or arguments) in square brackets [ ] are optional.

{ x | y | ... }

Alternative items are grouped in braces and separated by vertical bars.

One is selected.

[ x | y | ... ]

Optional alternative items are grouped in square brackets and

separated by vertical bars. One or none is selected.

{ x | y | ... } *

Alternative items are grouped in braces and separated by vertical bars.

A minimum of one or a maximum of all can be selected.

[ x | y | ... ] *

Optional alternative items are grouped in square brackets and

separated by vertical bars. Many or none can be selected.

&<1-n>

The argument(s) before the ampersand (&) sign can be entered 1 to n

times.

# A line starting with the # sign is comments.

GUI conventions

Convention Description

< > Button names are inside angle brackets. For example, click <OK>.

[ ]

Window names, menu items, data table and field names are inside

square brackets. For example, pop up the [New User] window.

/

Multi-level menus are separated by forward slashes. For example,

[File/Create/Folder].

Symbols

Convention Description

Means reader be extremely careful. Improper operation may cause

bodily injury.

Means reader be careful. Improper operation may cause data loss or

damage to equipment.

Means a complementary description.

Related Documentation

In addition to this manual, each MSR Series Routers documentation set includes the following:

Manual Description

MSR Series Routers User

Manual

It is a guide for the user to perform the operations correctly. It is

organized into the parts of getting started, system management,

interface, link layer protocol, network protocol, routing protocol,

multicast protocol, security, VPN, reliability, QoS, dial-up and VoIP,

as well as acronyms used in the manual.

It gives the user a detailed description of the operating commands.

It is organized into the parts of getting started, system

management, interface, link layer protocol, network protocol,

routing protocol, multicast protocol, security, VPN, reliability, QoS,

dial-up and VoIP, as well as a command index.

MSR Series Routers Interface

Card and Interface Module

Manual

It covers the pinouts, function, interface attributes, panels and

LEDs of all interface cards and modules available with the router.

MSR 20-1X Series Routers

Installation Manual

This guide describes the MSR 20-1X Series Routers and how to

install hardware, configure and boot software, and maintain

software and hardware. This guide also provides troubleshooting

and support information for your router.

MSR 30 Series Routers

Installation Manual

This guide describes the MSR 30 Series Routers and how to install

hardware, configure and boot software, and maintain software and

hardware. This guide also provides troubleshooting and support

information for your router.

MSR 50 Series Routers

Installation Manual

This guide describes the MSR 50 Series Routers and how to install

hardware, configure and boot software, and maintain software and

hardware. This guide also provides troubleshooting and support

information for your router.

MSR 20-1x Series Routers

Web-Based Configuration

Manual

It provides guidelines to Web-based configuration on the MSR

20-1x Series Routers.

MSR 20/30/50 Series Routers

Web-Based Configuration

Manual

It provides guidelines to Web-based configuration on the MSR

20/30/50 Series Routers.

Obtaining Documentation

You can access the most up-to-date H3C product documentation on the World Wide Web at this URL:

http://www.h3c.com.

The following are the columns from which you can obtain different categories of product documentation:

[Products & Solutions]: Provides information about products and technologies, as well as solutions.:

Provides information about products and technologies.

[Technical Support & Document > Technical Documents]: Provides several categories of product

documentation, such as installation, operation, and maintenance.

[Technical Support & Document > Product Support > Software]: Provides the documentation released

with the software version.

Documentation Feedback

You can e-mail your comments about product documentation to [email protected].

We appreciate your comments.

Environmental Protection

This product has been designed to comply with the requirements on environmental protection. For the

proper storage, use and disposal of this product, national laws and regulations must be observed.

1

Table of Contents

1 Overview.....................................................................................................................................................1-1

Introduction .............................................................................................................................................1-1

Router Model and Structure....................................................................................................................1-1

Fixed Interface.................................................................................................................................1-1

Interface Card..................................................................................................................................1-2

Processor and Memory...................................................................................................................1-2

Other Hardware Specifications........................................................................................................1-2

MSR 20-20 Router...........................................................................................................................1-3

MSR 20-21 Router...........................................................................................................................1-4

MSR 20-40 Router...........................................................................................................................1-6

Generic Modules.....................................................................................................................................1-7

SIC and DSIC Interface Cards........................................................................................................1-7

ESM Module....................................................................................................................................1-8

VPM and VCPM Module..................................................................................................................1-8

2 Installation Preparations...........................................................................................................................2-1

Requirements on Environment........................................................................................................2-1

Requirements on Temperature/Humidity ........................................................................................2-1

Requirements on Cleanness...........................................................................................................2-1

Requirements on Electrostatic Discharge Prevention.....................................................................2-2

Requirements on Electromagnetic Environments...........................................................................2-2

Requirements on Preventing Lightning...........................................................................................2-2

Checking the Rack ..........................................................................................................................2-3

Safety Precautions ..........................................................................................................................2-3

Installation Tools and Meters and Equipments...............................................................................2-3

3 Installation..................................................................................................................................................3-1

Installation Process.................................................................................................................................3-1

Installing the Cabinet...............................................................................................................................3-2

Installing the Router................................................................................................................................3-2

Installing the Router on a Workbench.............................................................................................3-2

Installing the Router on a Chassis...................................................................................................3-2

Installing Generic Modules......................................................................................................................3-3

Connecting the PGND Wire....................................................................................................................3-4

Connecting the Power Cord....................................................................................................................3-4

Power Input and PGND...................................................................................................................3-5

Connecting the AC-input Power Cord.............................................................................................3-5

Connecting the Console Terminal...........................................................................................................3-5

Fixed Interfaces.......................................................................................................................................3-6

Ethernet Interface............................................................................................................................3-6

Ethernet Switching Interface ...........................................................................................................3-8

Connecting AUX to a Modem..........................................................................................................3-9

Interface Card Module...........................................................................................................................3-10

Installation and Uninstall of the Slide Rail on MSR 20-40 Router ........................................................3-10

Slide Rail .......................................................................................................................................3-10

2

Installing the Slide Rail..................................................................................................................3-10

Uninstalling the Slide Rail..............................................................................................................3-11

Verifying Installation..............................................................................................................................3-11

4 Startup and Configuration ........................................................................................................................4-1

Startup.....................................................................................................................................................4-1

Setting up Configuration Environment.............................................................................................4-1

Powering on the Router...................................................................................................................4-3

Startup Process...............................................................................................................................4-4

Configuration Fundamentals...................................................................................................................4-5

Basic Configuration Procedures......................................................................................................4-6

Command Line Interface.................................................................................................................4-6

Arranging Slots and Numbering Interfaces .....................................................................................4-7

5 Software Maintenance...............................................................................................................................5-1

Introduction .............................................................................................................................................5-1

Files.................................................................................................................................................5-1

Software Maintenance Methods......................................................................................................5-3

BootROM Menu ......................................................................................................................................5-4

Main BootROM Menu......................................................................................................................5-4

BootROM Submenus.......................................................................................................................5-6

Upgrading BootROM Through Serial Port ..............................................................................................5-9

Modifying Serial Port Parameters....................................................................................................5-9

Upgrading BootROM.....................................................................................................................5-11

Upgrading Application Program Through Serial Port............................................................................5-12

Upgrading Application Program Through Ethernet Interface................................................................5-12

Configuring Ethernet Parameters..................................................................................................5-12

Upgrading Application Program Through Ethernet Interface........................................................5-14

Maintaining Application Program and Configuration Through Command Lines...................................5-16

Maintaining the Router with TFTP Server.....................................................................................5-16

Maintaining the Router with FTP Server .......................................................................................5-18

Maintaining Application Program and Configuration File......................................................................5-21

Dealing with Router Password Loss.....................................................................................................5-24

User Password Loss......................................................................................................................5-24

BootROM Password Loss .............................................................................................................5-25

Super Password Loss....................................................................................................................5-25

Backing up and Restoring BootROM....................................................................................................5-25

6 Hardware Maintenance..............................................................................................................................6-1

Preparing Tools.......................................................................................................................................6-1

Opening/Closing Chassis Cover.............................................................................................................6-1

Internal Structure.....................................................................................................................................6-3

Installing/Removing CF Card..................................................................................................................6-4

Structure..........................................................................................................................................6-4

Installing CF Card............................................................................................................................6-4

Removing CF Card..........................................................................................................................6-4

Replacing Memory Bar............................................................................................................................6-5

Memory Bar Structure .....................................................................................................................6-6

Memory Bar Slot..............................................................................................................................6-6

Installing/Removing Memory Bar ....................................................................................................6-6

3

Installing/Removing ESM/VCPM Card....................................................................................................6-7

7 Troubleshooting.........................................................................................................................................7-1

Troubleshooting the Power System........................................................................................................7-1

Troubleshooting the Configuration System.............................................................................................7-1

Troubleshooting Application Software Upgrade .....................................................................................7-1

i

Table of Contents

1 Overview·····················································································································································1-1

Introduction ·············································································································································1-1

Router Model and Structure····················································································································1-1

Fixed Interface·································································································································1-1

Interface Card··································································································································1-2

Processor and Memory···················································································································1-2

Other Hardware Specifications········································································································1-2

MSR 20-20 Router···························································································································1-3

MSR 20-21 Router···························································································································1-4

MSR 20-40 Router···························································································································1-6

Generic Modules·····································································································································1-7

SIC and DSIC Interface Cards········································································································1-7

ESM Module····································································································································1-8

VPM and VCPM Module··················································································································1-8

1-1

1 Overview

Introduction

MSR 20 Series Routers were self-developed by our company. for use on enterprise-level networks.

Depending on the network size, MSR 20 Series Routers can be either core routers on small and

medium enterprise networks, or access routers for network branches on some large-sized enterprise

networks. Therefore, MSR 20 Series Routers are suitable for the application on the carrier-level

networks, such as telecom management networks and billing networks. MSR 20 Series Routers adopt

modular design and provide a wide range of optional smart interface cards (SICs). The MSR-20, MSR

20-21 and MSR 20-40 are available with AC-powered units.

Currently, the MSR 20 series includes the following models:

z MSR 20-20

z MSR 20-21

z MSR 20-40

Router Model and Structure

The MSR 20 Series Routers include MSR 20-20, MSR 20-21, and MSR 20-40. These three models are

similar in chassis structure and layout. All of them can be put on the tabletop and can be mounted in

19-inch standard racks. The following subsections will give you more details about these three models.

Fixed Interface

Table 1-1 MSR 20-20/20-21/20-40 Routers Interface Description

Item MSR 20-20 MSR 20-21 MSR 20-40

Console 1 1 1

AUX 1 1 1

USB 1 1 1

FE Two FE interfaces Two FE interfaces Two FE interfaces

Fixed

interf

ace

FE switching interface 0 8 0

1-2

Interface Card

Table 1-2 Interface card description of MSR 20-20/20-21/20-40 Routers

Item MSR 20-20 MSR 20-21 MSR 20-40

External module SIC module 2 SICs 2 SICs 4 SICs

ESM module 1 1 2

VCPM module 0 0 1

Internal module

VPM strip 0 0 2

Processor and Memory

Table 1-3 Processor and memory description of MSR 20-20/20-21/20-40 Routers

Item MSR 20-20 MSR 20-21 MSR 20-40

Processor PowerPC PowerPC PowerPC

BootROM 4 MB 4 MB 4 MB

Memory

SDRAM

Default: 128 MB

Maximum: 384 MB

SDRAM

Default: 128 MB

Maximum: 384 MB

SDRAM

Default: 128 MB

Maximum: 384 MB

CF Flash

Default: 256 MB

Maximum: 1 GB

Default: 256 MB

Maximum: 1 GB

Default: 256 MB

Maximum: 1 GB

z BootROM stores bootstrap.

z The memory is used to store the communication data between the system and the CPU when the

system is running.

z The CF card is used to store the software system and configuration file. The CF card LED blinks

when the system is reading/writing data from/to the CF card. In this case, do not remove the CF

card, otherwise hardware and software damage may occur.

Other Hardware Specifications

Table 1-4 Other specifications description of MSR 20-20/20-21/20-40 Routers

Item

MSR 20-20

Description

MSR 20-21

Description

MSR 20-40

Description

Dimensions (H x W x

D)

(excluding feet and

rack-mounting ear)

44.2 × 360 × 287.1 mm

(1.74 × 14.17 × 11.3

in.)

44.2 × 360 × 287.1 mm

(1.74 × 14.17 × 11.3

in.)

44.2 × 442 × 407.1 mm

(1.74 × 17.4 × 16.02

in.)

Weight 3.4 kg (7.5 lb.) 3.4 kg (7.5 lb.) 5.4 kg (11.9 lb.)

1-3

Item

MSR 20-20

Description

MSR 20-21

Description

MSR 20-40

Description

AC input

Rated voltage: 100

VAC to 240 VAC;

50/60 Hz

Rated voltage: 100

VAC to 240 VAC;

50/60 Hz

Rated voltage: 100

VAC to 240 VAC;

50/60 Hz

Max power 54 W 54 W 100 W

Operating temperature

0°C to 40°C (32°F to

104°F)

0°C to 40°C (32°F to

104°F)

0°C to 40°C (32°F to

104°F)

Relative humidity

(noncondensing)

5% to 90% 5% to 90% 5% to 90%

MSR 20-20 Router

Appearance

1) Front view

Figure 1-1 Front view of MSR 20-20 router

(1) Power LED (PWR) (2) System LED (SYS)

(3) ESM LED (ESM)

2) Rear view

Figure 1-2 Rear view of MSR 20-20 router

(1) SIC slot2 (2) SIC slot1

(3) Grounding terminal (4) Power socket

(5) Power switch (6) Fixed Ethernet port0 (LAN0)

(7) Fixed Ethernet interface 1 (LAN1) (8) Console port (CON)

(9) Auxiliary port (AUX) (10) USB interface

(11) CF card LED (12) CF card interface

Panel LEDs

The following table gives the features of MSR 20-20 router LEDs:

1-4

Table 1-5 Front panel LEDs description of MSR 20-20 router

LED Description

PWR

Power LED:

ON means power is on.

OFF means power is off.

SYS

System operating LED:

Green and fast blinking means the system is booting.

Green and slow blinking means the system is operating normally.

Yellow and fast blinking means the system is malfunctioning.

Steady OFF means the system does not operate normally.

ESM

ESM module LED:

Green and slow blinking means the system is booting.

Green means ESM card is operation normally.

Yellow means ESM card is malfunctioning.

Steady OFF means no ESM card is present.

Table 1-6 Rear panel LEDs of MSR 20-20 Router

LED Description

LINK

OFF means no link is present.

ON means a link is present.

ACT

OFF means no data is being transmitted or received.

Blinking means data is being transmitted or received.

CF

Steady green means a CF card is present.

Green and blinking means the CF card is reading/writing data. To prevent data

corruption, do not remove the running CF card.

Steady yellow means the present CF card is malfunctioning.

Steady OFF means no CF card is present or the present CF card cannot be

identified by the system.

MSR 20-21 Router

Appearance

1) Front view

Figure 1-3 Front view of MSR 20-21

(1) Power LED (PWR) (2) System LED (SYS)

(3) ESM LED (ESM)

1-5

2) Rear view

Figure 1-4 Rear view of MSR 20-21

(1) SIC slot2 (2) SIC slot1

(3) Grounding terminal (4) Power socket

(5) Power switch (6) Fixed Ethernet port0 (LAN0)

(7) Fixed Ethernet port1 (LAN1) (8) Console port (CON)

(9) Auxiliary port (AUX) (10) USB interface

(11) CF card LED (12) CF card interface

(13) Fixed L2 switching port (LAN2LAN9)

Panel LEDs

The following table gives the features of MSR 20-21 router LEDs:

Table 1-7 Front panel LEDs description of MSR 20-21 router

LED Description

PWR

Power LED:

ON means power is on.

OFF means power is off.

SYS

System operating LED:

Green and fast blinking means the system is booting.

Green and slow blinking means the system is operating normally.

Yellow and fast blinking means the system is malfunctioning.

Steady OFF means the system does not operate normally.

ESM

ESM module LED:

Green and slow blinking means the system is booting.

Steady green means ESM card is operation normally.

Steady yellow means ESM card is malfunctioning.

Steady OFF means no ESM card is present.

Table 1-8 The rear panel LEDs of MSR 20-21 Router

LED Description

LINK

OFF means no link is present.

ON means a link is present.

ACT

OFF means no data is being transmitted or received.

Blinking means data is being transmitted or received.

1-6

LED Description

CF

Steady green means a CF card is present.

Green and blinking means the CF card is reading/writing data. To prevent data

corruption, do not remove the running CF card.

Steady yellow means the present CF card is malfunctioning.

Steady OFF means no CF card is present or the present CF card cannot be

identified by the system.

MSR 20-40 Router

Appearance

1) Front view

Figure 1-5 Front view of MSR 20-40

(1) Power LED (POWER) (2) System LED (SYSTEM)

(3) Console port (CONSOLE) (4) Auxiliary port (AUX)

(5) USB interface (6) CF card

(7) CF card LED (8) Power socket

(9) Power switch

2) Rear view

Figure 1-6 Rear view of MSR 20-40

(1) FE interface 0 (2) FE interface 1

(3) SIC slot1 (4) SIC slot2

(5) SIC slot3 (6) SIC slot4

(7) Grounding terminal (8) LEDs

Panel LEDs

The description of LEDs on MSR 20-40 router is as follows:

1-7

Table 1-9 Front panel LEDs description of MSR 20-40 router

LED Description

PWR

Power LED:

ON means the circuit board supplies power normally.

OFF means the circuit board does not supply power.

SYS

Hardware system operation LED:

Blinking means the system is operating normally.

Steady ON or steady OFF means the system does not operate normally.

CF

CF card LED:

Steady green means the CF card is in place, and can be identified by the router.

Blinking green means the CF card is being accessed and cannot be removed.

Steady yellow means the CF card is in place, but cannot be identified by the router.

OFF means no CF card is inserted or the CF card cannot be identified.

Table 1-10 Rear panel LEDs description of MSR 20-40 router

LED Description

LINK

OFF means no link is present.

ON means a link is present.

ACT

OFF means no data is being transmitted or received.

Blinking means data is being transmitted or received.

ESM0 to 1

OFF means no ESM is in the ESMx slot.

Steady green means an ESM is in the ESMx slot and operates normally.

Steady yellow means an ESM is in the ESMx slot but does not operate normally.

VCPM

OFF means no VCPM is in the slot.

Steady green means a VCPM is in the slot and operates normally.

Steady yellow means a VCPM is in the slot but does not operate normally.

VPM0 to 1

OFF means no VPM is in the VPMx slot.

Steady green means a VPM is in the VPMx slot and operates normally.

Steady yellow means a VPM is in the VPMx slot but does not operate normally.

Generic Modules

The MSR 20 series is available with generic modules such as SIC interface card and ESM. For detailed

information about interface cards, refer to MSR Series Routers Interface Card and Interface Module

Manual.

SIC and DSIC Interface Cards

MSR series routers adopt modular design and support a wide range of optional SIC/DSIC interface

cards, providing various interfaces, such as synchronous/asynchronous serial interface, Ethernet

interface, E1/T1, ISDN BRI/PRI, ADSL, audio interface, and Layer 2 switching interface, and so on.

1-8

z For an MSR 20-40 router, 4FSW/1FEA/1GEC/1ADSL/1ADSL-I can only be installed in Slot 2 or

Slot 4.

z Currently, MSR 20 series routers do not support PoE and regard SIC-4FSW-POE and

DSIC-9FSW-POE (if used) as only ordinary Layer 2 switching modules.

ESM Module

z High-performance network data encryption ESM module (ESM-ANDE)

z Standard network data encryption ESM module (ESM-SNDE)

ESM module supports IPSec and by using hardware encryption expedites IP packet encryption. The

use of hardware encryption/decryption and hashing operation allows the router to encrypt packets with

high performance and reliability.

The encryption card is optional. On a router installed with an encryption card, the main control board

functions to route IP packets and implement encryption-enabled VPN, while the encryption card

functions to encrypt packets.

Table 1-11 Encryption card attributes

Attribute Description

Protocol IPsec

Hardware encryption algorithm

Key algorithms: DES, 3DES, AES

Authentication algorithms: HMAC-MD5-96, HMAC-SHA-1-96

VPM and VCPM Module

VPM (Voice Processing Module) functions to implement the encryption/decryption, EC and CNG of

voices.

VCPM (Voice Co-Processing Module) processes the voice data in combination with VPM.

z Voice co-processing module (RT-VCPM)

z 8-channel voice processing module (RT-VPM8)

z 16-channel voice processing module (RT-VPM16)

z 24-channel voice processing module (RT-VPM24)

z 32-channel voice processing module (RT-VPM32)

VPM/VCPM is only available on MSR 20-40.

i

Table of Contents

2 Installation Preparations···························································································································2-1

Requirements on Environment········································································································2-1

Requirements on Temperature/Humidity ························································································2-1

Requirements on Cleanness···········································································································2-1

Requirements on Electrostatic Discharge Prevention·····································································2-2

Requirements on Electromagnetic Environments···········································································2-2

Requirements on Preventing Lightning···························································································2-2

Checking the Rack ··························································································································2-3

Safety Precautions ··························································································································2-3

Installation Tools and Meters and Equipments···············································································2-3

2-1

2 Installation Preparations

Requirements on Environment

MSR 20 Series must be used indoors. To ensure the normal operation and prolong their service life, the

following requirements for installation site must be met.

Requirements on Temperature/Humidity

To ensure the normal operation and prolong their service life, certain requirements on temperature and

humidity in the equipment room shall be met. If the relative humidity is too high, the insulation materials

in it will deteriorate easily or even lead to electric leakage. Sometimes this will result in change to the

mechanical performance of the materials and rusting of the metal components. If the relative humidity is

too low, the fastening screw will become loosen due to shrinkage of the isolation spacer. In an

environment with dry climate, static electricity may be produced, putting the CMOS of the router to risk.

High temperature is of the greatest risk: for it will significantly degrade the router’s reliability, speed up

aging process of the insulating materials, and shorten the service life of the router.

The requirements on the temperature and humidity for MSR 20 Series are shown in the following table:

Table 2-1 Temperature/humidity requirements in the equipment room

Temperature Relative Humidity

0°C to 40°C (32°F to 104°F)

5% to 90% (noncondensing)

Requirements on Cleanness

Dust is harmful to the safe operation of the Router. Dust on the chassis may result in static absorption,

thus causing poor contact of the metal connection components or points. Especially under the condition

of low indoor humidity, dust is easier to be absorbed.

The requirements on the dust concentration and diameter are shown in the following table:

Table 2-2 Limitation on dust content in equipment room

Diameter (μm)

0.5 1 3 5

Concentration

(particle/m³)

1.4 × 107

7 × 105

2.4 × 105

1.3 × 105

Besides the dust specifications, the equipment room of the Router should also meet the rigorous

requirements for the content of salt, acid and sulfide. These harmful gases could accelerate the metal

erosion and aging process of some parts. The specific limits of these harmful gases as SO

2

, H

2

S, NO

2

,

NH

3

and CI

2

are given in the following table.

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H3C MSR-20-21 ROUTER Installation guide

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H3C MSR-20-21 ROUTER Installation guide

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