Juniper ACX2200 Hardware Guide

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ACX2200 Universal Metro Router

Published

2020-11-10

Hardware Guide

Juniper Networks, Inc. 1133 Innovation Way Sunnyvale, California 94089 USA 408-745-2000 www.juniper.net

Juniper Networks, the Juniper Networks logo, Juniper, and Junos are registered trademarks of Juniper Networks, Inc. in the United States and other countries. All other trademarks, service marks, registered marks, or registered service marks are the property of their respective owners.

Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify, transfer, or otherwise revise this publication without notice.

ACX2200 Universal Metro Router Hardware Guide

The information in this document is current as of the date on the title page.

YEAR 2000 NOTICE

Juniper Networks hardware and software products are Year 2000 compliant. Junos OS has no known time-related limitations through the year 2038. However, the NTP application is known to have some difficulty in the year 2036.

END USER LICENSE AGREEMENT

The Juniper Networks product that is the subject of this technical documentation consists of (or is intended for use with) Juniper Networks software. Use of such software is subject to the terms and conditions of the End User License Agreement (“EULA”) posted at https://support.juniper.net/support/eula/. By downloading, installing or using such software, you agree to the terms and conditions of that EULA.

About the Documentation | ix

Documentation and Release Notes | ix

Using the Examples in This Manual | ix

Merging a Full Example | x

Merging a Snippet | xi

Documentation Conventions | xi

Documentation Feedback | xiv

Requesting Technical Support | xiv

Self-Help Online Tools and Resources | xv

Creating a Service Request with JTAC | xv

iii

Overview

ACX2200 System Overview | 17

ACX2200 Universal Metro Router Overview | 17

Benefits of the ACX2200 Router | 17

Chassis Description | 18

ACX2200 Routers Hardware and CLI Terminology Mapping | 19

Packet Flow on ACX Series Routers | 21

Protocols and Applications Supported by the ACX2200 Router | 23

ACX2200 Chassis Components | 31

Front Panel of an ACX2200 Router | 31

Uplink Ports on ACX2200 Routers | 33

Gigabit Ethernet RJ-45 Ports | 34

Gigabit Ethernet SFP Ports | 34

10-Gigabit Ethernet SFP+ Ports | 35

Alarm Contact Port on the ACX2200 Router | 36

Clocking Ports on the ACX2200 Router | 37

LEDs on ACX2200 Routers | 38

System LED on the Front Panel | 39

Ethernet Port LEDs | 39

SFP and SFP+ Port LEDs | 39

Management and Console Port LEDs on the Front Panel | 40

Cooling System and Airflow in an ACX2200 Router | 41

ACX2200 Power System | 42

ACX2200 Power Overview | 42

ACX2200 AC Power Specifications | 42

ACX2200 AC Power Cord Specifications | 43

ACX2200 DC Power Specifications | 45

Site Planning, Preparation, and Specifications

Site Preparation Checklist for ACX2200 Routers | 48

ACX2200 Site Guidelines and Requirements | 49

General Site Guidelines | 50

Site Electrical Wiring Guidelines | 50

Chassis Physical Specifications for ACX2200 Routers | 51

ACX2200 Router Environmental Specifications | 51

ACX2200 Chassis Grounding Cable and Lug Specifications | 53

Grounding Points Specifications | 53

Grounding Cable Lug Specifications | 54

Grounding Cable Specifications | 55

Clearance Requirements for Airflow and Hardware Maintenance on ACX2200 Routers | 56

Cabinet Requirements for ACX2200 Routers | 57

Rack Requirements for ACX2200 Routers | 58

ACX2200 Network Cable and Transceiver Planning | 60

Determining Transceiver Support and Specifications | 60

Calculating Power Budget and Power Margin for Fiber-Optic Cables | 61

How to Calculate Power Budget for Fiber-Optic Cable | 61

How to Calculate Power Margin for Fiber-Optic Cable | 62

Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion | 63

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable | 63

Attenuation and Dispersion in Fiber-Optic Cable | 64

ACX2200 Alarm, Management, and Clocking Cable Specifications and Pinouts | 65

Alarm Contact Connector Pinouts | 65

Management Port Connector Pinout Information for ACX Series Routers | 68

Console or Auxiliary Port Connector Pinout on ACX Series Routers | 68

USB Port Specifications for an ACX Series Router | 69

Clocking Port Specifications on the ACX2200 Router | 70

External Clocking Port Connector Specifications | 70

External Clocking Input Port Specifications | 70

Initial Installation and Configuration

Installing and Connecting an ACX2200 Router Overview | 73

Unpacking and Mounting the ACX2200 | 73

Unpacking an ACX2200 Router | 74

Parts Inventory (Packing List) for an ACX2200 Router | 75

Installing the ACX2200 Mounting Brackets | 76

Installing the ACX2200 Router in the Rack | 77

Connecting the ACX2200 to Power | 79

Connecting the ACX2200 Router to Earth Ground | 79

Connecting AC Power Cords to the ACX2200 Router | 81

Connecting DC Power Cables to the ACX2200 Router | 82

Connecting the ACX2200 to External Devices | 85

Connecting ACX2200 Routers to Management Devices | 85

Connecting the Router to a Network for Out-of-Band Management | 85

Connecting the Router to a Management Console or Auxiliary Device | 86

Connecting ACX2200 Routers to an External Alarm-Reporting Device | 87

Connecting ACX2200 Routers to External Clocking Devices | 88

Connecting 1-PPS and 10-MHz Timing Devices to the Router | 88

Connecting a T1 or E1 External Clocking Device to the Router | 89

Initially Configuring the ACX2200 Router | 90

Maintaining Components

Maintaining ACX2200 Components | 96

Routine Maintenance Procedures for the ACX2200 Router | 96

Maintaining Cables That Connect to ACX2200 Network Ports | 96

Maintaining the ACX2200 Uplink Ports | 97

Replacing ACX2200 Hardware Components | 98

Replacing an ACX2200 Console or Auxiliary Cable | 98

Replacing an ACX2200 Management Ethernet Cable | 99

Replacing an ACX2200 Fiber-Optic Cable | 100

Replacing an ACX2200 Transceiver | 102

Troubleshooting Hardware

Troubleshooting the ACX2200 | 107

Troubleshooting Resources for ACX2200 Routers | 107

Command-Line Interface | 107

Front Panel LEDs | 107

Monitoring System Log Messages | 108

Alarm Types and Severity Classes on ACX Series Routers | 108

Alarm Types | 109

Alarm Severity Classes | 109

Verifying Active Alarms | 109

Contacting Customer Support and Returning the Chassis or Components

Contacting Customer Support and Returning the Chassis or Components | 112

How to Return a Hardware Component to Juniper Networks, Inc. | 112

Locating the Serial Number on a ACX2200 Chassis or Component | 113

ACX2200 Chassis Serial Number Label | 114

Guidelines for Packing Hardware Components for Shipment | 114

Packing the ACX Series Router for Shipment | 115

Safety and Compliance Information

General Safety Guidelines and Warnings | 119

Definitions of Safety Warning Levels | 120

Qualified Personnel Warning | 123

Warning Statement for Norway and Sweden | 124

Fire Safety Requirements | 124

Fire Suppression | 124

Fire Suppression Equipment | 124

Installation Instructions Warning | 126

Chassis and Component Lifting Guidelines | 126

Restricted Access Warning | 128

Ramp Warning | 130

Rack-Mounting and Cabinet-Mounting Warnings | 131

Grounded Equipment Warning | 137

Radiation from Open Port Apertures Warning | 138

vii

Laser and LED Safety Guidelines and Warnings | 139

General Laser Safety Guidelines | 139

Class 1 Laser Product Warning | 140

Class 1 LED Product Warning | 141

Laser Beam Warning | 142

Maintenance and Operational Safety Guidelines and Warnings | 142

Battery Handling Warning | 144

Jewelry Removal Warning | 145

Lightning Activity Warning | 147

Operating Temperature Warning | 148

Product Disposal Warning | 150

General Electrical Safety Guidelines and Warnings | 151

Action to Take After an Electrical Accident | 152

Prevention of Electrostatic Discharge Damage | 152

AC Power Electrical Safety Guidelines | 154

AC Power Disconnection Warning | 155

ACX2200 DC Power Electrical Safety Guidelines | 156

DC Power Copper Conductors Warning | 157

DC Power Disconnection Warning | 158

DC Power Grounding Requirements and Warning | 160

DC Power Wiring Sequence Warning | 162

DC Power Wiring Terminations Warning | 165

Midplane Energy Hazard Warning | 167

Multiple Power Supplies Disconnection Warning | 168

TN Power Warning | 169

Agency Approvals for ACX2200 Routers | 169

Compliance Statements for NEBS for ACX2200 Routers | 171

viii

Compliance Statements for EMC Requirements for ACX2200 Routers | 172

Canada | 172

European Community | 172

Israel | 172

Japan | 173

United States | 173

Compliance Statements for Environmental Requirements | 174

Compliance Statements for Acoustic Noise for ACX2200 Routers | 174

About the Documentation

IN THIS SECTION

Documentation and Release Notes | ix

Using the Examples in This Manual | ix

Documentation Conventions | xi

Documentation Feedback | xiv

Requesting Technical Support | xiv

Use this guide to install hardware and perform initial software configuration, routine maintenance, and troubleshooting for the ACX2200 Universal Metro router. After completing the installation and basic configuration procedures covered in this guide, refer to the Junos OS documentation for information about further software configuration.

Documentation and Release Notes

To obtain the most current version of all Juniper Networks®technical documentation, see the product documentation page on the Juniper Networks website at https://www.juniper.net/documentation/.

If the information in the latest release notes differs from the information in the documentation, follow the product Release Notes.

Juniper Networks Books publishes books by Juniper Networks engineers and subject matter experts. These books go beyond the technical documentation to explore the nuances of network architecture, deployment, and administration. The current list can be viewed at https://www.juniper.net/books.

Using the Examples in This Manual

If you want to use the examples in this manual, you can use the load merge or the load merge relative command. These commands cause the software to merge the incoming configuration into the current candidate configuration. The example does not become active until you commit the candidate configuration.

If the example configuration contains the top level of the hierarchy (or multiple hierarchies), the example is a full example. In this case, use the load merge command.

If the example configuration does not start at the top level of the hierarchy, the example is a snippet. In this case, use the load merge relative command. These procedures are described in the following sections.

Merging a Full Example

To merge a full example, follow these steps:

1. From the HTML or PDF version of the manual, copy a configuration example into a text file, save the file with a name, and copy the file to a directory on your routing platform.

For example, copy the following configuration to a file and name the file ex-script.conf. Copy the ex-script.conf file to the /var/tmp directory on your routing platform.

system {

scripts {

commit {

file ex-script.xsl;

}

} } interfaces {

fxp0 {

disable; unit 0 {

family inet {

address 10.0.0.1/24;

}

} }

2. Merge the contents of the file into your routing platform configuration by issuing the load merge configuration mode command:

[edit] user@host# load merge /var/tmp/ex-script.conf load complete

Merging a Snippet

To merge a snippet, follow these steps:

1. From the HTML or PDF version of the manual, copy a configuration snippet into a text file, save the file with a name, and copy the file to a directory on your routing platform.

For example, copy the following snippet to a file and name the file ex-script-snippet.conf. Copy the ex-script-snippet.conf file to the /var/tmp directory on your routing platform.

commit {

file ex-script-snippet.xsl; }

2. Move to the hierarchy level that is relevant for this snippet by issuing the following configuration mode command:

[edit] user@host# edit system scripts [edit system scripts]

3. Merge the contents of the file into your routing platform configuration by issuing the load merge relative configuration mode command:

[edit system scripts] user@host# load merge relative /var/tmp/ex-script-snippet.conf load complete

For more information about the load command, see CLI Explorer.

Documentation Conventions

Table 1 on page xii defines notice icons used in this guide.

Table 1: Notice Icons

xii

DescriptionMeaningIcon

Indicates important features or instructions.Informational note

Caution

Indicates a situation that might result in loss of data or hardware damage.

Alerts you to the risk of personal injury or death.Warning

Alerts you to the risk of personal injury from a laser.Laser warning

Indicates helpful information.Tip

Alerts you to a recommended use or implementation.Best practice

Table 2 on page xii defines the text and syntax conventions used in this guide.

Table 2: Text and Syntax Conventions

ExamplesDescriptionConvention

Fixed-width text like this

Italic text like this

Represents text that you type.Bold text like this

Represents output that appears on the terminal screen.

Introduces or emphasizes important

•

new terms.

Identifies guide names.

•

Identifies RFC and Internet draft

•

titles.

To enter configuration mode, type the configure command:

user@host> configure

user@host> show chassis alarms

No alarms currently active

A policy term is a named structure

•

that defines match conditions and actions.

Junos OS CLI User Guide

•

RFC 1997, BGP Communities

•

Attribute

Table 2: Text and Syntax Conventions (continued)

xiii

ExamplesDescriptionConvention

Italic text like this

Text like this

< > (angle brackets)

| (pipe symbol)

Represents variables (options for which you substitute a value) in commands or configuration statements.

Represents names of configuration statements, commands, files, and directories; configuration hierarchy levels; or labels on routing platform components.

variables.

Indicates a choice between the mutually exclusive keywords or variables on either side of the symbol. The set of choices is often enclosed in parentheses for clarity.

Configure the machine’s domain name:

[edit] root@# set system domain-name

domain-name

To configure a stub area, include

•

the stub statement at the [edit protocols ospf area area-id]

hierarchy level.

The console port is labeled

•

CONSOLE.

stub <default-metric metric>;Encloses optional keywords or

broadcast | multicast

(string1 | string2 | string3)

# (pound sign)

[ ] (square brackets)

Indention and braces ( { } )

; (semicolon)

GUI Conventions

Indicates a comment specified on the same line as the configuration statement to which it applies.

Encloses a variable for which you can substitute one or more values.

Identifies a level in the configuration hierarchy.

Identifies a leaf statement at a configuration hierarchy level.

rsvp { # Required for dynamic MPLS only

community name members [ community-ids ]

[edit] routing-options {

static {

route default {

nexthop address; retain;

}

Table 2: Text and Syntax Conventions (continued)

xiv

ExamplesDescriptionConvention

Bold text like this

> (bold right angle bracket)

Represents graphical user interface (GUI) items you click or select.

Separates levels in a hierarchy of menu selections.

In the Logical Interfaces box, select

•

All Interfaces.

To cancel the configuration, click

•

Cancel.

In the configuration editor hierarchy, select Protocols>Ospf.

Documentation Feedback

We encourage you to provide feedback so that we can improve our documentation. You can use either of the following methods:

Online feedback system—Click TechLibrary Feedback, on the lower right of any page on the Juniper

•

Networks TechLibrary site, and do one of the following:

Click the thumbs-up icon if the information on the page was helpful to you.

•

Click the thumbs-down icon if the information on the page was not helpful to you or if you have

•

suggestions for improvement, and use the pop-up form to provide feedback.

E-mail—Send your comments to techpubs-comments@juniper.net. Include the document or topic name,

•

URL or page number, and software version (if applicable).

Requesting Technical Support

Technical product support is available through the Juniper Networks Technical Assistance Center (JTAC). If you are a customer with an active Juniper Care or Partner Support Services support contract, or are

covered under warranty, and need post-sales technical support, you can access our tools and resources online or open a case with JTAC.

JTAC policies—For a complete understanding of our JTAC procedures and policies, review the JTAC User

•

Guide located at https://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf.

Product warranties—For product warranty information, visit https://www.juniper.net/support/warranty/.

•

JTAC hours of operation—The JTAC centers have resources available 24 hours a day, 7 days a week,

•

365 days a year.

Self-Help Online Tools and Resources

For quick and easy problem resolution, Juniper Networks has designed an online self-service portal called the Customer Support Center (CSC) that provides you with the following features:

Find CSC offerings: https://www.juniper.net/customers/support/

•

Search for known bugs: https://prsearch.juniper.net/

•

Find product documentation: https://www.juniper.net/documentation/

•

Find solutions and answer questions using our Knowledge Base: https://kb.juniper.net/

•

Download the latest versions of software and review release notes:

•

https://www.juniper.net/customers/csc/software/

Search technical bulletins for relevant hardware and software notifications:

•

https://kb.juniper.net/InfoCenter/

Join and participate in the Juniper Networks Community Forum:

•

https://www.juniper.net/company/communities/

Create a service request online: https://myjuniper.juniper.net

•

To verify service entitlement by product serial number, use our Serial Number Entitlement (SNE) Tool:

https://entitlementsearch.juniper.net/entitlementsearch/

Creating a Service Request with JTAC

You can create a service request with JTAC on the Web or by telephone.

Visit https://myjuniper.juniper.net.

•

Call 1-888-314-JTAC (1-888-314-5822 toll-free in the USA, Canada, and Mexico).

•

For international or direct-dial options in countries without toll-free numbers, see

https://support.juniper.net/support/requesting-support/.

CHAPTER

Overview

ACX2200 System Overview | 17

ACX2200 Chassis Components | 31

Cooling System and Airflow in an ACX2200 Router | 41

ACX2200 Power System | 42

ACX2200 System Overview

IN THIS SECTION

ACX2200 Universal Metro Router Overview | 17

ACX2200 Routers Hardware and CLI Terminology Mapping | 19

Packet Flow on ACX Series Routers | 21

Protocols and Applications Supported by the ACX2200 Router | 23

ACX2200 Universal Metro Router Overview

IN THIS SECTION

Benefits of the ACX2200 Router | 17

Chassis Description | 18

The ACX2200 Universal Metro Router is principally designed to provide superior management for rapid provisioning to the access network. The ACX Series routers support rich Gigabit Ethernet and 10-Gigabit Ethernet capabilities for uplink, along with support for legacy interfaces and Gigabit Ethernet interfaces for radio and NodeB connectivity in a compact form factor that is environmentally hardened and passively cooled. Seamless, end-to-end MPLS can be used to address legacy and emerging requirements to provide the foundation for a converged network that utilizes the same mobile backhaul infrastructure for business or residential services.

Benefits of the ACX2200 Router

Flexible design—A built-in service engine makes the ACX2200 fully customizable and future-proof for

•

LTE-Advanced and 5G requirements. The ACX2200 provides a seamless, end-to-end service delivery platform that can grow and adapt to changing subscriber expectations and traffic demands.

Improved operational efficiency with zero-touch deployment (ZTD)—The ACX Series routers support

•

a zero-touch deployment (ZTD) model that significantly reduces the time for any new equipment installation and provisioning, resulting in improved operational efficiency.

Installation flexibility with an environmentally hardened design—Most ACX Series routers are temperature

•

hardened and support passive cooling for outdoor deployments in extreme weather conditions.

Chassis Description

The ACX Series router is a single-board router with a built-in Routing Engine and one Packet Forwarding Engine that has one “pseudo” Flexible PIC Concentrator (FPC 0 in the CLI). Because there is no switching fabric, the single Packet Forwarding Engine takes care of both ingress and egress packet forwarding:

Routing Engine—Provides Layer 3 routing services and network management.

•

Packet Forwarding Engine—Performs Layer 2 and Layer 3 packet switching, route lookups, and packet

•

forwarding.

The ACX Series router is powered by Junos OS, supporting extensive L2 and L3 features, IP and MPLS with traffic engineering, rich network management, fault management, service monitoring and Operation, Administration, and Maintenance (OAM) capabilities, and an open software development kit (SDK) system that allows providers to customize and integrate operations with their own management systems. For a list of related Junos OS documentation, see https://www.juniper.net/documentation/software/junos/.

As part of the mobile backhaul, the ACX Series router at the cell site and the MX Series router at the aggregation layer provide comprehensive end-to-end Ethernet, MPLS, and OAM features with the one Junos OS running on both platforms.

The ACX2200 router is a compact gateway router that is one rack unit (U; that is, 1.75 in., or 4.45 cm) tall. Several gateway routers can be stacked in a single floor-to-ceiling rack for increased port density per unit of floor space.

The chassis is a rigid sheet metal structure that houses all the other router components (see

Figure 1 on page 19 and Figure 2 on page 19). The chassis measures 1.75 in. (4.45 cm) high, 9.4 in. (24 cm)

deep, and 17.5 in. (44.5 cm) wide. The outer edges of the mounting brackets extend the width to 19 in. (48 cm) (from the front-mounting brackets to the rear of the chassis). The chassis installs in standard

11.81-in. (300-mm) deep (or larger) enclosed cabinets, 19-in. equipment racks, or telco open-frame racks.

The compact routers are 1 U tall. Several routers can be stacked in a single floor-to-ceiling rack for increased port density per unit of floor space.

The ACX2200 routers contain four Gigabit Ethernet RJ-45 ports, four Gigabit Ethernet combination ports (either Gigabit Ethernet RJ-45 ports or Gigabit Ethernet SFP ports), two Gigabit Ethernet SFP ports, and two 10-Gigabit Ethernet SFP+ ports. Use only one set of these combination ports (labeled COMBO PORTS) at a time.

Figure 1: Front Panel of the ACX2200 Router

g017847

g006403

Figure 2: Rear View of the ACX2200 Router

ACX2200 Routers Hardware and CLI Terminology Mapping

Table 3 on page 19 describes the hardware terms used in ACX2200 router documentation and the

corresponding terms used in the Junos OS command line interface (CLI). Figure 3 on page 21 shows the port locations of the interfaces.

Table 3: CLI Equivalents of Terms Used in Documentation for ACX2200 Routers

Hardware Item (as displayed in the CLI)

FPC (n)

Description (as displayed in the CLI)

Abbreviated name of the Flexible PIC Concentrator (FPC)

ACX2200

Value (as displayed in the CLI)

Value of n is always

Item in Documentation

Router chassis–ACX2200Chassis

The router does not have actual FPCs. In this case, FPC refers to the router itself

Additional Information

“Chassis Physical Specifications for ACX2200 Routers” on page 51

Interface Naming

Conventions Used in the

Junos OS Operational

Commands

Table 3: CLI Equivalents of Terms Used in Documentation for ACX2200 Routers (continued)

Hardware Item (as displayed in the CLI)

PIC (n)

Description (as displayed in the CLI)

Abbreviated name of the Physical Interface Card (PIC)

4x 1GE (RJ-45)

•

4x 1GE (SFP)

•

Value (as displayed in the CLI)

n is a value in the range of 0–3.

PIC 04x 1GE (RJ-45)

PIC 1One of the following:

Item in Documentation

The router does not have actual PIC devices; see entries for PIC 0 through PIC 3 for the equivalent item on the router

Built-in uplink ports on the front panel of the router

Additional Information

Interface Naming

Conventions Used in the

Junos OS Operational

Commands

“ACX2200 Universal Metro Router Overview” on page 17

Xcvr (n)

Abbreviated name of the transceiver

Built-in power supplyPower supply (n)

PIC 22x 1GE (SFP)

PIC 32x 10GE (SFP+)

n is a value equivalent to the number of the port in which the transceiver is installed.

Built-in uplink ports on the front panel of the router

Optical transceivers

DC power supplyValue of n is always

“ACX2200 Universal Metro Router Overview” on page 17

“Uplink Ports on ACX2200 Routers” on page 33

“ACX2200 Power Overview” on page 42

Table 3: CLI Equivalents of Terms Used in Documentation for ACX2200 Routers (continued)

g017872

ACX2200

MGMT CONSOLE/AUX

SYS

0 1

EXTREF CLKIN

ALARM

OUTIN IN OUT

1PPS 10MHz

0/0/0

0/0/2

0/0/1 0/1/10/1/0

0/0/3 0/1/2GE0/1/3

COMBOPORTS XE

0/3/0

0/3/1GE

0/1/2 0/1/3 0/2/1

0/1/0 0/1/1

0/2/0

FPC 0, PIC 0 GE 0/0/0-0/0/3

FPC 0, PIC 2 GE 0/2/0-0/2/1

FPC 0, PIC 1 GE 0/1/0-0/1/3

FPC 0, PIC 3 XE 0/3/0-0/3/1

Incoming packet

Ingress classification

In order of decreasing precedence:

MF classification (DFW) Fixed classification BA classification

Queuing Egress rewrite

Outgoing packet

g006408

Buffering Scheduling

Hardware Item (as displayed in the CLI)

Description (as displayed in the CLI)

Fan

NOTE: ACX2200

routers are fanless models.

Figure 3: ACX2200 Interface Port Mapping

Value (as displayed in the CLI)

Item in Documentation

Fan–Fan

Additional Information

“Cooling System and Airflow in an ACX2200 Router” on page 41

Packet Flow on ACX Series Routers

The class-of-service (CoS) architecture for ACX Series routers is in concept similar to that of MX Series routers. The general architecture for ACX Series routers is shown in Figure 4 on page 21.

Figure 4: ACX Series Router Packet Forwarding and Data Flow

Based on the model, ACX routers contain a built-in Routing Engine and Packet Forwarding Engine and can contain both T1/E1 and Gigabit Ethernet Ports.

The Packet Forwarding Engine has one or two “pseudo” Flexible PIC Concentrators. Because there is no switching fabric, the single Packet Forwarding Engine takes care of both ingress and egress packet forwarding.

Fixed classification places all packets in the same forwarding class, or the usual multifield (MF) or behavior aggregate (BA) classifications can be used to treat packets differently. BA classification with firewall filters

can be used for classification based on IP precedence, DSCP, IEEE, or other bits in the frame or packet

g006428

Rate limiting

BA and fixed classification

Forwarding class and packet loss priority

MF classification

Policing can overwrite forwarding class and packet loss priority

Forwarding class and packet loss priority determine rewrite value

Scheduling and shaping

Scheduling and shaping Forwarding class Qn + packet loss priority

WRED

header.

However, the ACX Series routers can also employ multiple BA classifiers on the same physical interface. The physical interfaces do not have to employ the same type of BA classifier. For example, a single physical interface can use classifiers based on IP precedence as well as IEEE 802.1p. If the CoS bits of interest are on the inner VLAN tag of a dual-tagged VLAN interface, the classifier can examine either the inner or outer bits. (By default, the classification is done based on the outer VLAN tag.)

Eight queues per egress port support scheduling using the weighted deficit round- robin (WDRR) mechanism, a form of round-robin queue servicing. The supported priority levels are strict-high and default (low). The ACX series router architecture supports both weighted random early detect (WRED) and weighted tail drop (WTD).

All CoS features are supported at line rate.

The packet pipeline through an ACX Series router is shown in Figure 5 on page 22. Note that the rate limiting is done with an integrated architecture along with all other CoS functions. Scheduling and shaping are supported on the output side.

Figure 5: ACX Series Router Packet Handling

SEE ALSO

Configuring CoS on ACX Series Routers

Protocols and Applications Supported by the ACX2200 Router

Table 4 on page 23 contains the first Junos OS Release support for protocols and applications on ACX2200

routers. A dash indicates that the protocol or application is not supported.

NOTE: The [edit logical-systems logical-system-name] hierarchy level is not supported on ACX

Series routers.

Table 4: Protocols and Applications Supported by ACX2200 Routers

First Supported Junos OS ReleaseProtocol or Application

Interface and Encapsulation Types

Ethernet interfaces—10/100/1000, 1G, 10G

Layer 3

Static routes

OSPF

IS-IS

12.3X54 –D15

–ATM Interfaces (including IMA interfaces)

–E1 Interfaces

–T1 Interfaces

–Circuit emulation interfaces

12.3X54 –D15

Internet Control Message Protocol (ICMP)

Address Resolution Protocol (ARP)

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

Bidirectional Forwarding Detection (BFD) protocol

Dynamic Host Configuration Protocol (DHCP)

IP fast reroute (FRR) (OSPF, IS-IS)

Maximum transmission unit (MTU) 1518

RSVP

LDP (targeted and direct)

MPLS, VPLS, VPNs

Static label-switched path (LSP)

12.3X54 –D15

FRR

Traffic engineering

Diffserv traffic engineering

E-LINE

Pseudowire Emulation Edge to Edge [PWE3 (signaled)]

Static Ethernet PWs

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

Layer 2 circuits

IEE802.1ag CC monitoring on active and standby pseudowires

Edge protection using static (Virtual Private Wire Service (VPWS)

Ethernet Layer 2

802.3ah EFM OAM

802.1ag connectivity fault management (CFM)

IEE802.1ag interface-status type, length, and value (TLV)

QoS

12.3X54 –D15

Firewall filters (access control list—ACLs)— family inet

Match Conditions for MPLS Traffic (ACX Series Routers)

Firewall filters—family ccc/any

Policing—per logical interface

Policing—per physical interface

Policing—per family

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

TrTCM (color aware, color blind)

SrTCM (color aware, color blind)

Host protection

8 queues per port

Priority queuing

Rate control

Scheduling with two different priorities

12.3X54 –D15

Low latency queue (LLQ)

WRED with two levels of DP

Classification—DSCP

Classification—MPLS EXP

Classification—IEEE 802.1p

Rewrite—DSCP

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

Rewrite MPLS EXP

Rewrite 802.1p

Rewrite MPLS and DSCP to different values

Timing

Timing–1588-v2, 1588-2008–client clock

SyncE

Building-integrated timing supply (BITS)

Clock Sync

12.3X54 –D15

OAM, Troubleshooting, Manageability, Lawful Intercept

Network Time Protocol (NTP)

SNMP

802.1ag CFM

802.3ah EFM

Y.1731 fault and performance management

–Redundant clock (multiple 1588 primary clocks)

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

MPLS OAM

RMON

Layer 2 traceroute

DNS

TFTP for software downloads

Port mirroring [local port mirroring]

Interface loopback

12.3X54 –D15

Interface byte and packet stats (full, as implemented in Junos OS)

Interface queue stats

Drop packet stats

Distinguish each 802.1ag connection by VLAN-ID

Interface passive-monitor-mode

Security

12.3X54 –D15

–Multipacket mirror

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

TACACS AAA

RADIUS authentication

Control plane DOS prevention

High Availability

MPLS FRR

BFD

ATM Transport

ATM over PWE3

12.3X54 –D15

RFC4717 ATM encapsulation: S6.1 ATM N to one cell mode (required by standard)

RFC4717: S6.3—ATM AAL5 SDU encapsulation (optional)

ATM PWE3 control word

ATM PWE3 by means of dynamic labels

ATM VPI/VCI swapping

ATM idle/unassigned cell suppression

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

First Supported Junos OS ReleaseProtocol or Application

ATM support for N to 1 PW promiscuous mode: 1 PW per port and 1 PW per VPI

Cell concatenation (1 to 30 cells per packet)

Packet/byte counters per VP and VC

ATM IMA

ATM Encapsulation

AAL5 SDU [n-to-1 cell relay]

ATM Queuing

ATM service categories (CBR, nrt-VBR, UBR) to the UNI

12.3X54 –D15

MAP ATM service categories to PW EXP bits

Input policing per VC

VC output shaping

Early packet discard

MIBs

Standard SNMP MIBs

Juniper Networks enterprise-specific MIBs

12.3X54 –D15

Table 4: Protocols and Applications Supported by ACX2200 Routers (continued)

TDM Pseudowire

First Supported Junos OS ReleaseProtocol or Application

Structure-Agnostic TDM over packet (SAToP)

ACX2200 Chassis Components

IN THIS SECTION

Front Panel of an ACX2200 Router | 31

Uplink Ports on ACX2200 Routers | 33

Alarm Contact Port on the ACX2200 Router | 36

Clocking Ports on the ACX2200 Router | 37

LEDs on ACX2200 Routers | 38

12.3X54 –D15

Front Panel of an ACX2200 Router

The front panel of an ACX2200 router consists of the following components (see Figure 7 on page 33 and

Figure 6 on page 32):

Chassis status LED labeled SYS

•

Two USB ports for upgrading Junos OS

•

Management Ethernet port labeled MGMT

•

Console or auxiliary port labeled CONSOLE/AUX

•

Alarm contact port labeled ALARM—accepts a DE-15 alarm cable

•

External clocking input port labeled EXT REF CLK IN

•

External clocking ports supporting 1PPS and 10MHz input and output

•

Network ports and corresponding status LEDs:

•

Four Gigabit Ethernet RJ-45 ports labeled 0/0/0 through 0/0/3

g017875

ACX2200

MGMT CONSOLE/AUX

SYS

0 1

EXTREF CLKIN

ALARM

OUTIN IN OUT

1PPS 10MHz

0/0/0

0/0/2

0/0/1 0/1/10/1/0

0/0/3 0/1/2GE0/1/3

COMBOPORTS XE

0/3/0

0/3/1GE

0/1/2 0/1/3 0/2/1

0/1/0 0/1/1

0/2/0

978

1114

1 2

13 12

3 5

•

Four combination ports (COMBO PORTS): either four Gigabit Ethernet RJ-45 ports or four Gigabit

•

Ethernet SFP ports, labeled 0/1/0 through 0/1/3.

Two Gigabit Ethernet (GE) SFP ports, labeled 0/2/0 and 0/2/1, that accept transceivers

•

Two 10-Gigabit Ethernet (XE) ports, labeled 0/3/0 and 0/3/1, that accept SFP+ transceivers

•

Figure 6: Front Panel of the AC-powered ACX2200 Router

8—1— Ten-Gigabit Ethernet SFP+ portsAC inlets

9—2— Gigabit Ethernet SFP portsManagement Ethernet port

10—3— Combination Gigabit Ethernet SFP portsConsole or auxiliary port

11—4— External clocking portsAlarm contact port

12—5— External clocking input portRJ-45 Gigabit Ethernet network ports

13—6— USB portsCombination Gigabit Ethernet ports

14—7— System LEDESD point

Figure 7: Front Panel of the DC-powered ACX2200 Router

g017848

ACX2200

MGMT CONSOLE/AUX

SYS

0 1

EXTREF CLKIN

ALARM

OUTIN IN OUT

1PPS 10MHz

0/0/0

0/0/2

0/0/1 0/1/10/1/0

0/0/3 0/1/2GE0/1/3

COMBOPORTS XE

0/3/0

0/3/1GE

0/1/2 0/1/3 0/2/1

0/1/0 0/1/1

0/2/0

978

1114

1 2

13 12

3 5

9—1— Gigabit Ethernet SFP portsDC terminal

10—2— Combination Gigabit Ethernet SFP portsManagement Ethernet port

11—3— External clocking portsConsole or auxiliary port

12—4— External clocking input portAlarm contact port

13—5— USB portsRJ-45 Gigabit Ethernet network ports

14—6— System LEDCombination Gigabit Ethernet ports

8—Ten-Gigabit Ethernet SFP+ ports

Uplink Ports on ACX2200 Routers

IN THIS SECTION

Gigabit Ethernet RJ-45 Ports | 34

Gigabit Ethernet SFP Ports | 34

10-Gigabit Ethernet SFP+ Ports | 35

15—7— Grounding terminalESD point

TIP: You can find information about the pluggable transceivers supported on your Juniper

Networks device by using the Hardware Compatibility Tool. In addition to transceiver and connector type, the optical and cable characteristics—where applicable—are documented for each transceiver. The Hardware Compatibility Tool allows you to search by product, displaying all the transceivers supported on that device, or category, displaying all the transceivers by interface speed or type. The Hardware Compatibility Tool is located at

https://apps.juniper.net/hct/.

The list of supported transceivers for the ACX2200 is located at

https://pathfinder.juniper.net/hct/product/#prd=ACX2200.

The following ports are supported on ACX2200 routers:

Gigabit Ethernet RJ-45 Ports

Each ACX2200 router has eight Gigabit Ethernet RJ-45 ports. Table 5 on page 34 describes the ports in more detail.

Table 5: RJ-45 Port Features

DescriptionFeature

10/100/1000BASE-TSupported standards

Category 5Cable

RJ-45Connector

0/0/0 through 0/0/3 and 0/1/0 through 0/1/3Port numbering (hardware)

ge-0/0/0 through ge-0/0/3 and ge-0/1/0 through ge-0/1/3Port numbering (software)

Gigabit Ethernet SFP Ports

The GE ports described in Table 6 on page 35 support small form-factor pluggable (SFP) transceivers.

NOTE: You can use Gigabit Ethernet transceivers in the GE ports, or you can use 10-Gigabit

Ethernet transceivers in the XE ports. Use one set of ports at a time.

Table 6: SFP Port Features

DescriptionFeature

Supported standards

Cable

Connector

See the Hardware Compatibility Tool for the specifications of transceivers supported on the ACX2200. The list of supported transceivers for the ACX2200 is located at

https://pathfinder.juniper.net/hct/product/#prd=ACX2200.

0/1/0 through 0/1/3 and 0/2/0 through 0/2/1Port numbering (hardware)

ge-0/1/0 through ge-0/1/3 and ge-0/2/0 through ge-0/2/1Port numbering (software)

10-Gigabit Ethernet SFP+ Ports

The XE ports described in Table 7 on page 35 support SFP+ transceivers.

NOTE: You can use Gigabit Ethernet transceivers in the GE ports, or you can use 10-Gigabit

Ethernet transceivers in the XE ports. Use one set of ports at a time.

Table 7: SFP+ Port Features

Supported standards

Cable

Connector

SEE ALSO

ACX2200 Universal Metro Router Overview | 17

DescriptionFeature

See the Hardware Compatibility Tool for the specifications of transceivers supported on the ACX2200. The list of supported transceivers for the ACX2200 is located at

https://pathfinder.juniper.net/hct/product/#prd=ACX2200.

0/3/0 and 0/3/1Port numbering (hardware)

xe-0/3/0 and xe-0/3/1Port numbering (software)

Alarm Contact Port on the ACX2200 Router

The ACX2200 router has four external alarm contacts (also known as potential free contacts) for connecting the router to external alarm devices. The port labeled ALARM uses a 15-pin D-type connector. The external alarm contact has 15 pins that accept a single core wire from external alarm devices. A DE15 alarm cable is required to connect the ACX2200 router to external alarm devices. Use the gauge wire appropriate for the external device that you are connecting.

Whenever a system condition triggers an alarm, the alarm relay contacts are activated, which in turn activates the external alarm devices. The alarm setting is open or closed.

You can connect and configure two output alarms and four input alarms. Two additional output alarms are reserved and are used to indicate major and minor system alarms. Each output and input alarm has two contacts for connecting the router to external alarm devices. Contact 1 of each alarm can be configured as Normally Open [NO] or Normally Closed [NC] through the CLI. Contact 2 of each alarm functions as a reference [REF] or negative potential terminal for Contact 1 of the corresponding alarm and provides a current path for external alarm devices. Table 8 on page 36 describes the functions of the alarm contacts.

Table 8: Alarm Relay Contact Functions

FunctionContact NameContact Name

Normally Open (NO)Contact 1

Normally Closed (NC)

Reference (REF)Contact 2

Current is not flowing through Contact 1 and Contact 2 [REF] when operating normally. When the current flows, the closed alarm is generated.

Current is flowing through Contact 1 and Contact 2 [REF] when operating normally. When the current stops flowing, the open alarm is generated.

Provides the current path for the external alarm-reporting device and functions as a reference or negative potential terminal for Contact 1.

Figure 8 on page 37 shows an example of a wiring diagram for a simple output alarm-reporting device. In

this case the device is a light bulb that illuminates when the device encounters a condition that activates the red alarm LED and relay contacts. The alarm relay contacts can also be used to activate other devices such as bells or buzzers.

Figure 8: Sample Output Alarm-Reporting Device

Figure 9 on page 37 shows an example of a wiring diagram for a simple input alarm-reporting device. In

this case the push button switch is an alarm sensor that triggers an input alarm when a door-open condition occurs.

Figure 9: Sample Input Alarm- Reporting Device

SEE ALSO

Connecting ACX2200 Routers to an External Alarm-Reporting Device | 87

Clocking Ports on the ACX2200 Router

The clocking ports acquire the clock source and synchronize communication over time-division multiplexing (TDM) interfaces in the router. The clocking ports distribute a synchronized clock signal throughout the router by locking onto a clock signal originating from an internal clock source or by connecting to an external clock source.

The reference clock inputs can be T1/E1 line clocks, Ethernet recovered clocks, IEEE 1588v2 recovered clocks, or xDSL NTU-R timing. Externally available reference clocks are BITS T1/E1 rate clocks, 1 PPS, and 10 MHz. The four SubMiniature B (SMB) connectors and one RJ-48 port on the front panel of the router connect to external clock signal sources. The clocking ports provide the synchronized output clocks from any one of the above reference inputs based on the clock’s priority.

Internal clock sources within the ACX2200 router include:

External building-integrated timing system (BITS) timing port

•

10-MHz timing connectors (one input and one output)

•

1.544-MHz/2.048 MHz T1/E1 (RJ-48) ports for timing input or output

•

1 pulse-per-second (PPS) connectors (one input and one output)

•

Time-of-Day (TOD) RS232 port

•

SyncE support on RJ-45/SFP ports as timing input or output

•

Packet timing (IEEE 1588v2) includes:

•

Timing input when configured as Ordinary Clock (OC) or Boundary Clock (BC)

•

Timing output when configured as BC

•

SEE ALSO

Connecting ACX2200 Routers to External Clocking Devices | 88 Clocking Port Specifications on the ACX2200 Router | 70

LEDs on ACX2200 Routers

IN THIS SECTION

System LED on the Front Panel | 39

Ethernet Port LEDs | 39

SFP and SFP+ Port LEDs | 39

Management and Console Port LEDs on the Front Panel | 40

The following LEDs are supported on ACX2200 routers:

System LED on the Front Panel

One bicolor LED labeled SYS indicates the status of the router. Table 9 on page 39 describes the system LED in more detail.

Table 9: System LED on the Front Panel

DescriptionStateColorLabel

Router is transitioning online.BlinkingGreenSYS

Router is functioning normally.On

steadily

Router has reported an alarm.BlinkingRed

Router has failed.On

steadily

Ethernet Port LEDs

The front panel has eight Gigabit Ethernet RJ-45 ports, each with one pair of port LEDs. Table 10 on page 39 describes the LEDs in more detail.

Table 10: Ethernet Port LEDs

DescriptionStateColorLocationName

Link is online.OnGreenLeftLink

No link.Off–

The port is receiving data.BlinkingGreenRightRX

The port is not receiving data.Off–

SFP and SFP+ Port LEDs

The front panel has six Gigabit Ethernet SFP ports and two 10-Gigabit Ethernet SFP+ ports, each with one pair of port LEDs. Table 11 on page 40 describes the LEDs in more detail.

Table 11: SFP and SFP+ Link LEDs

DescriptionStateColorLocationName

Link is online.OnGreenLeftLink

No link.Off–

The port is receiving data.BlinkingGreenRightRX

The port is not receiving data.Off–

Management and Console Port LEDs on the Front Panel

Two RJ-45 ports, labeled MGMT and CONSOLE/AUX, each have a pair of LEDs that display the status of the port. Table 12 on page 40 describes the LEDs in more detail.

Table 12: Management and Console LEDs

DescriptionStateColorLocationName

Link is online.OnGreenLeftLink/Activity

Indicates link activity.BlinkingYellow

No link.Off–

The port is receiving data.BlinkingGreenRightRX

The port is not receiving data.Off–

SEE ALSO

Troubleshooting Resources for ACX2200 Routers | 107 Uplink Ports on ACX2200 Routers | 33

Cooling System and Airflow in an ACX2200 Router

g006417

Front

Rear

The ACX2200 router does not contain fans and is passively cooled by the heatsinks (see

Figure 10 on page 41).

Temperature sensors in the chassis monitor the temperature within the chassis. If the temperature inside the chassis rises above the threshold, the router shuts down automatically.

Figure 10: Cooling System and Airflow in an ACX2200 Router

RELATED DOCUMENTATION

Site Preparation Checklist for ACX2200 Routers | 48

Rack Requirements for ACX2200 Routers | 58

Cabinet Requirements for ACX2200 Routers | 57

Clearance Requirements for Airflow and Hardware Maintenance on ACX2200 Routers | 56 ACX2200 Router Environmental Specifications | 51

ACX2200 Power System

IN THIS SECTION

ACX2200 Power Overview | 42

ACX2200 AC Power Specifications | 42

ACX2200 AC Power Cord Specifications | 43

ACX2200 DC Power Specifications | 45

ACX2200 Power Overview

The power supply in an ACX2200 router is built along the front panel of the chassis, with AC inlets or DC power terminals on the front to connect power to the router.

Table 13 on page 42 lists the power consumed by the ACX2200 router.

Table 13: Power Consumed by ACX2200 Routers

ValueDescription

Maximum power consumed by the router

SEE ALSO

Connecting AC Power Cords to the ACX2200 Router | 81 Connecting DC Power Cables to the ACX2200 Router | 82

42 W @–60V and 0.7A (ACX2200 DC)

35 W @110V and 0.318A (ACX2200 AC)

ACX2200 AC Power Specifications

Table 14 on page 43 lists the AC power system electrical specifications.

Table 14: AC Power System Electrical Specifications

SpecificationItem

Operating range: 100 to 240 VACAC input voltage

50 to 60 Hz (nominal)AC input line frequency

2 A (100 VAC) or 1 A (240 VAC)AC system current rating

NOTE: We recommend that you use a dedicated customer site circuit breaker rated for 2 A (100

VAC) or 1 A (240 VAC), or as required by local code. Doing so enables you to operate the router in any configuration without upgrading the power infrastructure.

ACX2200 AC Power Cord Specifications

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the router. An AC power cord connects each power supply to the power distribution panel.

You can order detachable AC power cords, each approximately 8 ft (2.5 m) long that supply AC power to the router. The C15 appliance coupler end of the cord, as described by International Electrotechnical Commission (IEC) standard 60320, inserts into the AC appliance inlet coupler. The plug end of the power cord fits into the power source receptacle that is standard for your geographic location.

Table 15 on page 43 provides specifications on the AC power cord provided for each country or region.

Table 15: AC Power Cord Specifications

Design StandardPlug TypeElectrical SpecificationModel NumberCountry

AS/NZZS 3112-2000SAA/3250 VAC, 10 A, 50 HzCBL-GP-C15-AUAustralia

GB2099, GB1002PRC/3250 VAC, 10 A, 50 HzCBL-GP-C15-CHChina

Switzerland, and United Kingdom)

CEE (7) VIIVIIG250 VAC, 10 A, 50 HzCBL-GP-C15-EUEurope (except Italy,

Table 15: AC Power Cord Specifications (continued)

Design StandardPlug TypeElectrical SpecificationModel NumberCountry

CEI 23-16I/3G250 VAC, 10 A, 50 HzCBL-GP-C15-ITItaly

CBL-GP-C15-JPJapan

JIS 8303498GJ125 VAC, 15 A, 50 Hz or 60

CEE (7) VIIVIIG250 VAC, 10 A, 50 HzCBL-GP-C15-KRKorea

SEV 1011 / 6534-212G250 VAC, 10 A, 50 HzCBL-GP-C15-SZSwitzerland

NEMA 5-15498G125 VAC, 13 A, 60 HzCBL-GP-C15-USNorth America

BS 1363/ABS89/13250 VAC, 10 A, 50 HzCBL-GP-C15-UKUnited Kingdom

WARNING: The AC power cord for the router is intended for use with the router only

and not for any other use.

WARNING: The attached power cable is only for this product. Do not use the cable

for another product. Translation in Japanese follows:

NOTE: In North America, AC power cords must not exceed approximately 14.75 ft (4.5 m) in

length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical Code (CEC) Section 4-010(3). You can order AC power cords that are in compliance.

CAUTION: Power cords and cables must not block access to device components or

drape where people could trip on them.

ACX2200 DC Power Specifications

The power supply in ACX2200 routers is built in along the front left panel of the chassis with DC power terminals to connect power to the router.

When the ACX2200 router are operating normally and both power supplies are switched on, load sharing between them occurs automatically. When one power supply fails or is turned off, the other power supply immediately assumes the entire electrical load for the system. A single power supply can provide full power for as long as the router is operational.

NOTE: When only one power supply is available on an ACX2200 router, we recommend that

you connect both the power inputs to the same source. That is, connect both the DC power inputs of the ACX2200 router to the only available power supply. Doing so ensures that you get the maximum amount of hold-up time during a power failure.

ACX2200 routers support a wide range of voltage ranges as shown in Table 16 on page 45.

Table 16: DC Power Electrical Specifications

SpecificationItem

DC input voltages

DC input currents

20 to 30 VDC

•

–39 to –56 VDC

•

–39 to –72 VDC

•

10 A @ 24 VDC

•

5 A @ –48 VDC

•

4 A @ –60 VDC

•

200 WPower supply output

NOTE: We recommend that you provide at least 10.5 A @ 24 VDC and use a facility circuit

breaker rated for 10 A minimum. Doing so enables you to operate the router in any configuration without upgrading the power infrastructure, and allows the router to function at full capacity using multiple power supplies.

SEE ALSO

ACX2200 DC Power Electrical Safety Guidelines | 156

DC Power Copper Conductors Warning | 157

DC Power Disconnection Warning | 158

DC Power Grounding Requirements and Warning | 160

DC Power Wiring Sequence Warning | 162 DC Power Wiring Terminations Warning | 165

CHAPTER

Site Planning, Preparation, and

Specifications

Site Preparation Checklist for ACX2200 Routers | 48

ACX2200 Site Guidelines and Requirements | 49

ACX2200 Network Cable and Transceiver Planning | 60

ACX2200 Alarm, Management, and Clocking Cable Specifications and Pinouts | 65

Site Preparation Checklist for ACX2200 Routers

The checklist in Table 17 on page 48 summarizes the tasks you need to perform when preparing a site for ACX2200 router installation.

Table 17: Site Preparation Checklist

DatePerformed ByFor More InformationItem or Task

Environment

Verify that environmental factors such as temperature and humidity do not exceed router tolerances.

Power

Measure the distance between external power sources and router installation site.

Locate sites for connection of system grounding.

Calculate the power consumption and requirements.

Hardware Configuration

Choose the number and types of routers you want to install.

Rack or Cabinet

“ACX2200 Router Environmental Specifications” on page 51

“ACX2200 DC Power Specifications” on page 45

“ACX2200 Universal Metro Router Overview” on page 17

Verify that your rack or cabinet meets the minimum requirements for the installation of the router.

Plan rack or cabinet location, including required space clearances.

“Rack Requirements for ACX2200 Routers” on page 58

“Cabinet Requirements for ACX2200 Routers” on page 57

“Clearance Requirements for Airflow and Hardware Maintenance on ACX2200 Routers” on page 56

Table 17: Site Preparation Checklist (continued)

Secure the rack or cabinet to the floor and building structure.

Cables

Acquire cables and connectors:

Determine the number of cables needed

•

based on your planned configuration.

Review the maximum distance allowed

•

for each cable. Choose the length of cable based on the distance between the hardware components being connected.

Plan the cable routing and management.

DatePerformed ByFor More InformationItem or Task

RELATED DOCUMENTATION

Installing and Connecting an ACX2200 Router Overview | 73

ACX2200 Site Guidelines and Requirements

IN THIS SECTION

General Site Guidelines | 50

Site Electrical Wiring Guidelines | 50

Chassis Physical Specifications for ACX2200 Routers | 51

ACX2200 Router Environmental Specifications | 51

ACX2200 Chassis Grounding Cable and Lug Specifications | 53

Clearance Requirements for Airflow and Hardware Maintenance on ACX2200 Routers | 56

Cabinet Requirements for ACX2200 Routers | 57

Rack Requirements for ACX2200 Routers | 58

General Site Guidelines

Efficient device operation requires proper site planning and maintenance and proper layout of the equipment, rack or cabinet (if used), and wiring closet.

To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:

Keep the area around the chassis free from dust and conductive material, such as metal flakes.

•

Follow prescribed airflow guidelines to ensure that the cooling system functions properly and that

•

exhaust from other equipment does not blow into the intake vents of the device.

Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the

•

equipment. Static discharge can cause components to fail completely or intermittently over time.

Install the device in a secure area, so that only authorized personnel can access the device.

•

Site Electrical Wiring Guidelines

Table 18 on page 50 describes the factors you must consider while planning the electrical wiring at your

site.

WARNING: You must provide a properly grounded and shielded environment and use

electrical surge-suppression devices.

Table 18: Site Electrical Wiring Guidelines

Site Wiring Factor

Signaling limitations

Guidelines

If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding:

Improperly installed wires cause radio frequency interference (RFI).

•

Damage from lightning strikes occurs when wires exceed recommended distances or pass between

•

buildings.

Electromagnetic pulses (EMPs) caused by lightning damage unshielded conductors and electronic

•

devices.

Table 18: Site Electrical Wiring Guidelines (continued)

Site Wiring Factor

Guidelines

Radio frequency interference

Electromagnetic compatibility

To reduce or eliminate RFI from your site wiring, do the following:

Use a twisted-pair cable with a good distribution of grounding conductors.

•

If you must exceed the recommended distances, use a high-quality twisted-pair cable with one

•

ground conductor for each data signal when applicable.

If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice.

Some of the problems caused by strong sources of electromagnetic interference (EMI) are:

Destruction of the signal drivers and receivers in the device

•

Electrical hazards as a result of power surges conducted over the lines into the equipment

•

Chassis Physical Specifications for ACX2200 Routers

The ACX2200 router is a rigid sheet-metal structure that houses the hardware components.

Table 19 on page 51 summarizes the physical specifications of the ACX2200 router.

Table 19: Physical Specifications of the ACX2200 Router Chassis

ValueDescription

1.75 in. (4.45 cm)Height

Width

17.5 in. (44.5 cm)

•

19.2 in. (48.7 cm) with mounting brackets attached

•

9.4 in. (24 cm)Depth

7 lb (3.2 kg)Weight

ACX2200 Router Environmental Specifications

The router must be installed in a rack or cabinet housed in a dry, clean, well-ventilated, and temperature-controlled environment.

Ensure that these environmental guidelines are followed:

The site must be as dust-free as possible, because dust can clog air intake vents and filters, reducing the

•

efficiency of the router cooling system.

Maintain ambient airflow for normal router operation. If the airflow is blocked or restricted, or if the

•

intake air is too warm, the router might overheat, leading to the router temperature monitor shutting down the router to protect the hardware components.

NOTE: Depending on the ambient temperature, it may take up to 5 minutes for the router to

heat up to the operating temperature.

Table 20 on page 52 provides the required environmental conditions for normal router operation.

Table 20: Router Environmental Specifications

ValueDescription

Relative humidity

Temperature

Commercial grade SFP/SFP+ temperature

Seismic

Configuration

No performance degradation to 10,000 ft (3048 m)Altitude

Normal operation ensured in relative humidity range of 5% to 90%, noncondensing

Harsh environment: –40°F (–40°C) to 149°F (65°C)

•

Central office environment: 23°F (–5°C) to 131°F (55°C)

•

Harsh environment: –40°F (–40°C) to 122°F (50°C)

•

Central office environment: –40°F (–40°C) to 104°F (40°C)

•

Designed to meet Telcordia Technologies Zone 4 earthquake requirements

Harsh environment:

•

1-GB ports: Full traffic

•

10-GB ports: Full traffic 1G ports

•

SFP/SFP+: Extended temperature grade or industrial grade

•

Central office environment:

•

1GB ports: Full traffic

•

10GB ports: Full traffic 1G ports

•

SFP/SFP+: Extended temperature grade or industrial grade

•

NOTE: Install the router only in restricted areas, such as dedicated equipment rooms and

ACX2000

MGMT

SYS 0 1

CONSOLE/AUX

ALARM

1PPS

10MHz

OUT

IN OUT

T1/E1

0/0/4

0/0/12

0/0/5

0/0/13

0/0/6

0/0/14

0/0/7

0/0/15

0/0/0

0/0/8

0/0/1

0/0/9

0/0/2

0/0/10

0/0/3

0/0/11

0/1/0

0/1/4

0/1/1

0/1/5

0/1/2

0/1/6

0/1/3POE

0/1/7POE

0/2/0

0/2/1 0/3/0 0/3/1

g006433

EXTREF CLKIN

equipment closets, in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA 70.

ACX2200 Chassis Grounding Cable and Lug Specifications

IN THIS SECTION

Grounding Points Specifications | 53

Grounding Cable Lug Specifications | 54

Grounding Cable Specifications | 55

Grounding Points Specifications

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the router must be adequately grounded before power is connected. To ground DC-powered routers, you must connect a grounding cable to earth ground and then attach it to the chassis grounding points using the two screws provided (see Figure 11 on page 53).

Two threaded holes are provided on the front of the router chassis for connecting the router to earth ground. The grounding points fit 0.5-inch-long SAE 10-32 screws (American). The grounding points are spaced at 0.625-in. (15.86-mm) centers.

Figure 11: Grounding Points on the ACX2200 Routers

1—Grounding points

NOTE: All bare grounding connection points to the DC-powered ACX2200 router must be

cleaned and coated with an antioxidant solution before grounding the router.

NOTE: All surfaces on the ACX2200 router that are unplated must be brought to a bright finish

and treated with an antioxidant solution before connecting the router.

NOTE: All nonconductive surfaces on the ACX2200 router must be removed from all threads

and connection points to ensure electrical continuity.

Grounding Cable Lug Specifications

The grounding cable lug is used to secure the grounding cable to the grounding points on the DC-powered ACX chassis. The grounding cable lug attaches to the grounding cable (see Figure 12 on page 55) and is secured to the router by two 0.5-inch-long SAE 10–32 screws. The grounding cable lug and screws are not supplied with the router.

Figure 12: Grounding Cable Lug

CAUTION: Before router installation begins, a licensed electrician must attach a cable

lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the router.

Grounding Cable Specifications

You must provide one grounding cable that meets the following specifications: 16-AWG (1.31 mm2), minimum 90°C wire, or as required by the local code.

SEE ALSO

Connecting the ACX2200 Router to Earth Ground | 79 Prevention of Electrostatic Discharge Damage | 152

Clearance Requirements for Airflow and Hardware Maintenance on

RearFront

17.5"

(44.5 cm)

9.4"

(24 cm)

g006404

Front-mounting flange

19.2"

(48.7 cm)

2.16" (5.5 cm)

clearance required

for the cables

.75" (2 cm) clearance required for free airflow

3" (7.6 cm)

ACX2200 Routers

When planning the installation site, allow sufficient clearance around the rack (see Figure 13 on page 56):

For service personnel to remove and install hardware components, allow at least 2.16 in. (5.5 cm) in

•

front of the router.

The rack or cabinet must have an adequate supply of cooling air.

•

Ensure that the cabinet allows the chassis hot exhaust air to exit from the cabinet without recirculating

•

into the router.

When deploying the router in harsh environments where the router may operate between 131° F (55°

•

C) and 149° F (65° C), allow a 1-rack unit (U) gap above and below the router.

Ensure that there is a minimum of 1 meter/second airflow in any direction.

•

Figure 13: ACX2200 Chassis Dimensions and Clearance Requirements

SEE ALSO

Installing and Connecting an ACX2200 Router Overview | 73 Site Preparation Checklist for ACX2200 Routers | 48

Cabinet Requirements for ACX2200 Routers

You can mount the router in a cabinet that contains a 19-in. (48.3 cm) rack.

Cabinet requirements consist of:

Cabinet size

•

Clearance requirements

•

Cabinet airflow requirements

•

Table 21 on page 57 provides the cabinet requirements and specifications for the router.

Table 21: Cabinet Requirements and Specifications for the ACX2200 Router

GuidelinesCabinet Requirement

Cabinet size

Cabinet clearance

You can mount the router in a cabinet that contains a

•

19-in. (48.3 cm) rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number

EIA-310–D) published by the Electronics Industry Association (http://www.eia.org).

NOTE: The cabinet must meet the strength

requirements to support the weight of the router.

The minimum cabinet size must be able to

•

accommodate the maximum external dimensions of the router.

The outer edges of the mounting brackets extend the

•

width of the chassis to 19 in. (48.3 cm).

The minimum total clearance inside the cabinet is 30 in.

•

(76.2 cm) between the inside of the front door and the inside of the rear door.

Table 21: Cabinet Requirements and Specifications for the ACX2200 Router (continued)

GuidelinesCabinet Requirement

Cabinet airflow requirements

When you mount the router in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating.

Ensure that an adequate cool air supply to dissipate

•

the thermal output of the router or routers.

Ensure that the cabinet allows the chassis hot exhaust

•

air to exit the cabinet without recirculating into the router. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top allows the best airflow through the chassis. If the cabinet contains a top or doors, perforations in these elements assist with removing the hot air exhaust.

Install the router in the cabinet in a way that maximizes

•

the open space on the side of the chassis that has the hot air exhaust. This space maximizes the clearance for critical airflow.

Route and dress all cables to minimize the blockage of

•

airflow to and from the chassis.

Ensure that the spacing of rails and adjacent cabinets

•

allows for the proper clearance around the router and cabinet.

A cabinet larger than the minimum required provides

•

better airflow and reduces the chance of overheating.

SEE ALSO

General Site Guidelines | 50

Site Preparation Checklist for ACX2200 Routers | 48 Installing and Connecting an ACX2200 Router Overview | 73

Rack Requirements for ACX2200 Routers

You can mount the router on two-post racks or four-post racks.

Rack requirements consist of:

Rack type

•

Mounting bracket hole spacing

•

Rack size and strength

•

Rack connection to the building structure

•

Table 22 on page 59 provides the rack requirements and specifications for the router.

Table 22: Rack Requirements and Specifications for the Router

GuidelinesRack Requirement

Rack type

Mounting bracket hole spacing

Rack size and strength

Use a two-post rack or a four-post rack. You can mount the router on any two-post or four-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75 in., or 4.45 cm) increments and that meets the size and strength requirements to support the weight.

A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association (http://www.eia.org).

The rack must meet the strength requirements to support the weight of the chassis.

The holes in the mounting brackets are spaced at 1 U (1.75 in., or 4.45 cm) so that the router can be mounted in any rack that provides holes spaced at that distance.

Ensure that the rack complies with this standard:

•

A 19-in. (48.3 cm) rack as defined in Cabinets, Racks, Panels, and Associated Equipment

•

(document number EIA-310-D) published by the Electronics Industry Association (http://www.eia.org).

Ensure that the rack rails are spaced widely enough to accommodate the router chassis'

•

external dimensions . The outer edges of the front-mounting brackets extend the width of the chassis to 19.2 in. (48.7 cm).

The rack must be strong enough to support the weight of the router.

•

Ensure that the spacing of rails and adjacent racks allows for the proper clearance around

•

the router and rack.

Rack connection to building structure

Secure the rack to the building structure.

•

If earthquakes are a possibility in your geographical area, secure the rack to the floor.

•

Secure the rack to the ceiling brackets as well as to the wall or floor brackets for maximum

•

stability.

One pair of mounting brackets for mounting the router on two posts of a rack is supplied with each router. For mounting the router on four posts of a rack or cabinet, you can order a four-post rack-mount kit separately.

SEE ALSO

Installing and Connecting an ACX2200 Router Overview | 73

ACX2200 Network Cable and Transceiver Planning

IN THIS SECTION

Determining Transceiver Support and Specifications | 60

Calculating Power Budget and Power Margin for Fiber-Optic Cables | 61

Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion | 63

Determining Transceiver Support and Specifications

You can find information about the pluggable transceivers supported on your Juniper Networks device by using the Hardware Compatibility Tool. In addition to transceiver and connector type, the optical and cable characteristics—where applicable—are documented for each transceiver. The Hardware Compatibility Tool allows you to search by product, displaying all the transceivers supported on that device, or category, displaying all the transceivers by interface speed or type. The Hardware Compatibility Tool is located at

https://apps.juniper.net/hct/.

Some transceivers support additional monitoring using the operational mode CLI command show interfaces diagnostics optics. Use the Hardware Compatibility Tool to determine if your transceiver supports monitoring. See the Junos OS documentation for your device for a description of the monitoring fields.

CAUTION: If you face a problem running a Juniper Networks device that uses a

third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.

SEE ALSO

show interfaces diagnostics optics (Gigabit Ethernet, 10-Gigabit Ethernet, 40-Gigabit Ethernet, 100-Gigabit Ethernet, and Virtual Chassis Port)

show interfaces diagnostics optics (SONET)

show interfaces diagnostics optics

Calculating Power Budget and Power Margin for Fiber-Optic Cables

Use the information in this topic and the specifications for your optical interface to calculate the power budget and power margin for fiber-optic cables.

TIP: You can use the Hardware Compatibility Tool to find information about the pluggable

transceivers supported on your Juniper Networks device.

To calculate the power budget and power margin, perform the following tasks:

How to Calculate Power Budget for Fiber-Optic Cable | 61

How to Calculate Power Margin for Fiber-Optic Cable | 62

How to Calculate Power Budget for Fiber-Optic Cable

To ensure that fiber-optic connections have sufficient power for correct operation, you need to calculate the link's power budget, which is the maximum amount of power it can transmit. When you calculate the power budget, you use a worst-case analysis to provide a margin of error, even though all the parts of an actual system do not operate at the worst-case levels. To calculate the worst-case estimate of power budget (PB), you assume minimum transmitter power (PT) and minimum receiver sensitivity (PR):

PB= PT– P

The following hypothetical power budget equation uses values measured in decibels (dB) and decibels referred to one milliwatt (dBm):

PB= PT– P

PB= –15 dBm – (–28 dBm)

PB= 13 dB

How to Calculate Power Margin for Fiber-Optic Cable

After calculating a link's power budget, you can calculate the power margin (PM), which represents the amount of power available after subtracting attenuation or link loss (LL) from the power budget (PB). A worst-case estimate of PMassumes maximum LL:

PM= PB– LL

PMgreater than zero indicates that the power budget is sufficient to operate the receiver.

Factors that can cause link loss include higher-order mode losses, modal and chromatic dispersion, connectors, splices, and fiber attenuation. Table 23 on page 62 lists an estimated amount of loss for the factors used in the following sample calculations. For information about the actual amount of signal loss caused by equipment and other factors, refer to vendor documentation.

Table 23: Estimated Values for Factors Causing Link Loss

Estimated Link-Loss ValueLink-Loss Factor

Higher-order mode losses

Modal and chromatic dispersion

Fiber attenuation

Single mode—None

Multimode—0.5 dB

Single mode—None

Multimode—None, if product of bandwidth and distance is less than 500 MHz-km

0.5 dBConnector

0.5 dBSplice

Single mode—0.5 dB/km

Multimode—1 dB/km

The following sample calculation for a 2-km-long multimode link with a power budget (PB) of 13 dB uses the estimated values from Table 23 on page 62 to calculate link loss (LL) as the sum of fiber attenuation

(2 km @ 1 dB/km, or 2 dB) and loss for five connectors (0.5 dB per connector, or 2.5 dB) and two splices (0.5 dB per splice, or 1 dB) as well as higher-order mode losses (0.5 dB). The power margin (PM) is calculated

as follows:

PM= PB– LL

PM= 13 dB – 2 km (1 dB/km) – 5 (0.5 dB) – 2 (0.5 dB) – 0.5 dB

PM= 13 dB – 2 dB – 2.5 dB – 1 dB – 0.5 dB

PM= 7 dB

The following sample calculation for an 8-km-long single-mode link with a power budget (PB) of 13 dB uses the estimated values from Table 23 on page 62 to calculate link loss (LL) as the sum of fiber attenuation

(8 km @ 0.5 dB/km, or 4 dB) and loss for seven connectors (0.5 dB per connector, or 3.5 dB). The power margin (PM) is calculated as follows:

PM= PB– LL

PM= 13 dB – 8 km (0.5 dB/km) – 7(0.5 dB)

PM= 13 dB – 4 dB – 3.5 dB

PM= 5.5 dB

In both examples, the calculated power margin is greater than zero, indicating that the link has sufficient power for transmission and does not exceed the maximum receiver input power.

Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion

IN THIS SECTION

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable | 63

Attenuation and Dispersion in Fiber-Optic Cable | 64

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable

Multimode fiber is large enough in diameter to allow rays of light to reflect internally (bounce off the walls of the fiber). Interfaces with multimode optics typically use LEDs as light sources. However, LEDs are not coherent sources. They spray varying wavelengths of light into the multimode fiber, which reflects the light at different angles. Light rays travel in jagged lines through a multimode fiber, causing signal dispersion. When light traveling in the fiber core radiates into the fiber cladding, higher-order mode loss results. Together these factors limit the transmission distance of multimode fiber compared with single-mode fiber.

Single-mode fiber is so small in diameter that rays of light can reflect internally through one layer only. Interfaces with single-mode optics use lasers as light sources. Lasers generate a single wavelength of light, which travels in a straight line through the single-mode fiber. Compared with multimode fiber, single-mode fiber has higher bandwidth and can carry signals for longer distances.

Exceeding the maximum transmission distances can result in significant signal loss, which causes unreliable transmission.

Attenuation and Dispersion in Fiber-Optic Cable

Correct functioning of an optical data link depends on modulated light reaching the receiver with enough power to be demodulated correctly. Attenuation is the reduction in power of the light signal as it is transmitted. Attenuation is caused by passive media components, such as cables, cable splices, and connectors. Although attenuation is significantly lower for optical fiber than for other media, it still occurs in both multimode and single-mode transmission. An efficient optical data link must have enough light available to overcome attenuation.

Dispersion is the spreading of the signal over time. The following two types of dispersion can affect an optical data link:

Chromatic dispersion—Spreading of the signal over time resulting from the different speeds of light rays.

•

Modal dispersion—Spreading of the signal over time resulting from the different propagation modes in

•

the fiber.

For multimode transmission, modal dispersion, rather than chromatic dispersion or attenuation, usually limits the maximum bit rate and link length. For single-mode transmission, modal dispersion is not a factor. However, at higher bit rates and over longer distances, chromatic dispersion rather than modal dispersion limits maximum link length.

An efficient optical data link must have enough light to exceed the minimum power that the receiver requires to operate within its specifications. In addition, the total dispersion must be less than the limits specified for the type of link in Telcordia Technologies document GR-253-CORE (Section 4.3) and International Telecommunications Union (ITU) document G.957.

When chromatic dispersion is at the maximum allowed, its effect can be considered as a power penalty in the power budget. The optical power budget must allow for the sum of component attenuation, power penalties (including those from dispersion), and a safety margin for unexpected losses.

ACX2200 Alarm, Management, and Clocking Cable Specifications and Pinouts

IN THIS SECTION

Alarm Contact Connector Pinouts | 65

Management Port Connector Pinout Information for ACX Series Routers | 68

Console or Auxiliary Port Connector Pinout on ACX Series Routers | 68

USB Port Specifications for an ACX Series Router | 69

Clocking Port Specifications on the ACX2200 Router | 70

Alarm Contact Connector Pinouts

You can independently configure alarm input ports (0 to 3) to operate in Normally Open or Normally Closed mode, and to trigger a red alarm condition or a yellow alarm condition, or to ignore alarm conditions.

You can independently configure alarm output ports (0 and 1) can be configured to relay alarm information when the system condition goes to a red or yellow alarm condition and when the alarm output port is configured to trigger based on alarm input condition. Alarm output ports (2 and 3) are used to indicate major and minor system alarms and are normally in open mode.

Table 24 on page 65 shows the alarm contact connector pinouts.

Table 24: Alarm Contact Connector Pinouts

FunctionCLI Port MappingDirectionSignal DefinitionPin Number

Input Alarm Port 0InputALARM_IN0_NO/NC1

External alarm input 0 (if voltage on this pin is between 24V to 72V with reference to Pin 6, alarm input 0 is in closed condition)

Input Alarm Port 1InputALARM_IN1_REF2

External alarm input 1 (Reference for Pin

Table 24: Alarm Contact Connector Pinouts (continued)

FunctionCLI Port MappingDirectionSignal DefinitionPin Number

Input Alarm Port 2InputALARM_IN2_NO/NC3

Input Alarm Port 3InputALARM_IN3_NO/NC4

OutputALARM_OUT3_REF5

Reserved for Minor alarm

External alarm input 2 (if voltage on this pin is between 24V to 72V with reference to Pin 8, alarm input 2 is in closed condition)

External alarm input 3 (if voltage on this pin is between 24V to 72V with reference to Pin 8, alarm input 3 is in closed condition)

External alarm output 3 (this pin is connected to Pin 10 in closed condition)

Input Alarm Port 0InputALARM_IN0_REF6

Input Alarm Port 1InputALARM_IN1_NO/NC7

InputALARM_IN2_IN3_REF8

OutputALARM_OUT2_REF9

Input Alarm Port 2 and Input Alarm Port 3

Reserved for Major alarm

External alarm input 0 (Reference for Pin

External alarm input 1 (if voltage on this pin is between 24V to 72V with reference to Pin 2, alarm input 1 is closed)

Common contact for external alarm input 3 and 4 (Reference for Pin 3 and Pin 4)

External alarm output 2 (this pin is connected to Pin 15 in closed condition)

Table 24: Alarm Contact Connector Pinouts (continued)

FunctionCLI Port MappingDirectionSignal DefinitionPin Number

OutputALARM_OUT3_NO/NC10

Reserved for Minor alarm

Output Alarm Port 0OutputALARM_OUT0_NO/NC11

Output Alarm Port 0OutputALARM_OUT0_REF12

Output Alarm Port 1OutputALARM_OUT1_NO/NC13

Output Alarm Port 1OutputALARM_OUT1_REF14

External alarm output 3 (this pin is connected to Pin 5 in closed condition)

External alarm output 0 (this pin is connected to Pin 12 in closed condition)

External alarm output 0 (this pin is connected to Pin 11 in closed condition)

External alarm output 1 (this pin is connected to Pin 14 in closed condition)

External alarm output 1 (this pin is connected to Pin 13 in closed condition)

OutputALARM_OUT2_NO/NC15

SEE ALSO

Connecting ACX2200 Routers to External Clocking Devices | 88 Alarm Contact Port on the ACX2200 Router | 36

Reserved for Major alarm

External alarm output 2 (this pin is connected to Pin 9 in closed condition)

Management Port Connector Pinout Information for ACX Series Routers

The management port— labeled MGMT— on an ACX Series router uses an RJ-45 connector to connect to a management device for out-of-band management.

The port uses an autosensing RJ-45 connector to support a 10/100BASE-T connection. Two LEDs indicate link activity on the port and the administrative status of the port.

Table 25 on page 68 provides the pinout information for the RJ-45 connector for the management port.

Table 25: Management Port Connector Pinout Information

DirectionDescriptionPin

In/OutTRD[0]-1

In/OutTRD[0]+2

In/OutTRD[1]-3

In/OutTRD[1]+4

In/OutTRD[2]-5

In/OutTRD[2]+6

In/OutTRD[3]-7

In/OutTRD[3]+8

Console or Auxiliary Port Connector Pinout on ACX Series Routers

The port labeled CONSOLE/AUX on the front panel is an asynchronous serial interface that accept an RJ-45 connector. Use a cable with the pinouts described in Table 26 on page 69 to connect the Routing Engine to an auxiliary or console management device.

NOTE: You must use a shielded twisted pair (STP) cable for both outdoor and indoor deployments.

Table 26: Connector Pinout for the Console/Auxiliary Port

DirectionCPUDescriptionSignalPin

OutRouting EngineRequest to SendRTS1

Out1588 CPUTransmit DataTXD2

OutRouting EngineTransmit DataTXD3

––Signal GroundGround4

––Signal GroundGround5

InRouting EngineReceive DataRXD6

In1588 CPUReceive DataRXD7

InRouting EngineClear to SendCTS8

USB Port Specifications for an ACX Series Router

The following Juniper Networks USB flash drives have been tested and are officially supported for the USB port on all ACX Series routers:

RE-USB-1G-S

•

RE-USB-2G-S

•

RE-USB-4G-S

•

CAUTION: Any USB memory product that is not listed as supported for ACX Series

routers has not been tested by Juniper Networks. The use of any unsupported USB memory product could expose your ACX Series router to unpredictable behavior. Juniper Networks Technical Assistance Center (JTAC) can provide only limited support for issues related to unsupported hardware. We strongly recommend that you use only supported USB flash drives.

All USB flash drives used on ACX Series routers must have the following features:

USB 2.0 or later

•

Formatted with a FAT or MS-DOS file system

•

Clocking Port Specifications on the ACX2200 Router

IN THIS SECTION

External Clocking Port Connector Specifications | 70

External Clocking Input Port Specifications | 70

External Clocking Port Connector Specifications

The external clocking port on the ACX2200 router contains four SMB connectors that support 10 MHz GPS and 1 pulse-per-second (PPS) signals. These signals can also be accessed through the External Clocking Input port. These signals are internally isolated and have surge protection. Use a Molex 50-ohm SMB connector or equivalent (not provided) to connect to the external clocking ports.

External Clocking Input Port Specifications

An external clocking input port labeled EXT REF CLK IN on the front panel of the router allows you to connect external clock signal sources.

The port uses an autosensing RJ-48 connector to support framed T1 or E1 signals. Two LEDs indicate link activity on the port and function in the same way as the T1/E1 ports. The clocking information is extracted from the input, but the data is discarded.

Table 27 on page 70 provides the pinout information for the RJ-48 connector for the external clocking

input port.

Table 27: External Clocking Input Port Connector Pinouts

DirectionDescriptionPin

InputEXT_CLKA_RRING_LINE1

InputEXT_CLKA_RTIP_LINE2

–Reserved3

OutputEXT_CLKA_TRING_LINE4

OutputEXT_CLKA_TTIP_LINE5

–Reserved6

Table 27: External Clocking Input Port Connector Pinouts (continued)

SEE ALSO

Connecting ACX2200 Routers to External Clocking Devices | 88 Clocking Ports on the ACX2200 Router | 37

DirectionDescriptionPin

–Reserved7

–Reserved8

CHAPTER

Initial Installation and Configuration

Installing and Connecting an ACX2200 Router Overview | 73

Unpacking and Mounting the ACX2200 | 73

Connecting the ACX2200 to Power | 79

Connecting the ACX2200 to External Devices | 85

Initially Configuring the ACX2200 Router | 90

Installing and Connecting an ACX2200 Router Overview

To install and connect an ACX2200 router:

1. Unpack the router and verify the parts received. See “Unpacking an ACX2200 Router” on page 74.

2. Mount the router. See “Installing the ACX2200 Router in the Rack” on page 77.

3. Ground the router. See “Connecting the ACX2200 Router to Earth Ground” on page 79.

4. Connect the router to power.

AC-powered models—See “Connecting AC Power Cords to the ACX2200 Router” on page 81

•

DC-powered models—See “Connecting DC Power Cables to the ACX2200 Router” on page 82

•

5. Connect the router to external devices. See:

Connecting ACX2200 Routers to Management Devices on page 85

•

Connecting ACX2200 Routers to an External Alarm-Reporting Device on page 87

•

Connecting ACX2200 Routers to External Clocking Devices on page 88

•

6. Configure the router. See “Initially Configuring the ACX2200 Router” on page 90.

RELATED DOCUMENTATION

Site Preparation Checklist for ACX2200 Routers | 48 General Site Guidelines | 50

Unpacking and Mounting the ACX2200

IN THIS SECTION

Unpacking an ACX2200 Router | 74

Parts Inventory (Packing List) for an ACX2200 Router | 75

Installing the ACX2200 Mounting Brackets | 76

Installing the ACX2200 Router in the Rack | 77

Unpacking an ACX2200 Router

The ACX2200 routers are shipped in a cardboard carton, secured with foam packing material. The carton also contains an accessory box.

CAUTION: ACX2200 routers are maximally protected inside the shipping carton. Do

not unpack the routers until you are ready to begin installation.

To unpack the router and prepare for installation, you need the following tools:

Blank panels to cover any slots not occupied by a component

•

To unpack the router:

1. Move the shipping carton to a staging area as close to the installation site as possible, but where you have enough room to remove the system components.

2. Position the carton so that the arrows are pointing up.

3. Open the top flaps on the shipping carton.

4. Remove the accessory box, and verify the contents in it against the parts inventory on the label attached to the carton.

5. Pull out the packing material holding the router in place.

6. Verify the chassis components received against the packing list included with the router. An inventory of parts provided with the router is provided in “Parts Inventory (Packing List) for an ACX2200 Router”

on page 75.

7. Save the shipping carton and packing materials in case you need to move or ship the router later.

SEE ALSO

ACX2200 Universal Metro Router Overview | 17 Site Preparation Checklist for ACX2200 Routers | 48

Parts Inventory (Packing List) for an ACX2200 Router

The ACX2200 routers are shipped in a cardboard carton, secured with foam packing material. The carton also contains an accessory box.

The router shipment includes a packing list. Check the parts you receive in the router shipping carton against the items on the packing list. The packing list specifies the part number and description of each part in your order. The parts shipped depend on the configuration you order.

If any part on the packing list is missing, contact your customer service representative or contact Juniper Customer Care from within the U.S. or Canada by telephone at 1-888-314-5822. For international-dial or direct-dial options in countries without toll-free numbers, see

https://www.juniper.net/support/requesting-support.html.

Table 28 on page 75 lists the parts and their quantities in the packing list.

Table 28: Parts List for an ACX2200 Router

QuantityComponent

1Router with built-in power supply

2Mounting brackets

8Mounting screws to attach the mounting brackets to the router chassis

4SFP dust cover

1RJ-45 cable and RJ-45 to DB-9 serial port adapter

1Quick Start installation instructions

1Juniper Networks Product Warranty

1End User License Agreement

NOTE: You must provide additional mounting screws if needed that are appropriate for your

g006405

rack or cabinet to mount the chassis on a rack or a cabinet.

SEE ALSO

ACX2200 Universal Metro Router Overview | 17

Installing the ACX2200 Mounting Brackets

To attach the mounting brackets, you need the following tools:

Phillips (+) screwdriver, number 2

•

Two mounting brackets for front or rear mounting ship with the router (see Figure 14 on page 76 and

Figure 15 on page 77).

To attach both mounting brackets to either the front or rear of the chassis:

1. Align the bracket with the two sets of mounting holes.

2. Insert the four screws at the top and bottom of the bracket, and tighten each partially.

3. Tighten the four screws completely.

4. Repeat the procedure for the other bracket.

Figure 14: Installing the Mounting Brackets to the Front of the ACX2200 Router

Figure 15: Installing the Mounting Brackets to the Rear of the ACX2200 Router

g006406

Installing the ACX2200 Router in the Rack

NOTE: The router can be installed horizontally in a rack or cabinet. For additional installation

options, contact JTAC.

To install the router in the rack (see Figure 16 on page 78):

CAUTION: Before front mounting the router in a rack, have a qualified technician

verify that the rack is strong enough to support the router's weight (about 7 lb (3.2 kg)) and is adequately supported at the installation site.

NOTE: One person must be available to lift the router while another secures it to the rack.

CAUTION: If you are mounting multiple units on a rack, mount the heaviest unit at

the bottom of the rack, and mount the other units from the bottom of the rack to the top in decreasing order of the weight of the units.

1. Ensure that the rack is in its permanent location and is secured to the building. Ensure that the installation site allows adequate clearance for both airflow and maintenance.

2. Position the router in front of the rack or cabinet.

3. Hold onto the bottom of the chassis, and carefully lift it so that the mounting brackets contact the rack rails.

WARNING: To prevent injury, keep your back straight and lift with your legs, not

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Mounting rack

Mounting bracket

your back. Avoid twisting your body as you lift. Balance the load evenly and be sure that your footing is solid.

4. Align the mounting brackets with the holes in the rack rails.

5. Install a mounting screw into each of the open mounting holes aligned with the rack, starting from the bottom.

6. Visually inspect the alignment of the router. If the router is installed properly in the rack, all the mounting screws on one side of the rack should be aligned with the mounting screws on the opposite side, and the router should be level.

Figure 16: Installing the Front-Mounted Router in the Rack

SEE ALSO

Site Preparation Checklist for ACX2200 Routers | 48

Connecting the ACX2200 to Power

IN THIS SECTION

Connecting the ACX2200 Router to Earth Ground | 79

Connecting AC Power Cords to the ACX2200 Router | 81

Connecting DC Power Cables to the ACX2200 Router | 82

Connecting the ACX2200 Router to Earth Ground

To ground the router, you need the following tools:

Phillips (+) screwdriver, number 2

•

ESD grounding wrist strap

•

Two SAE 10-32 screws and flat washers (not provided)

•

Grounding lug, Panduit LCD6-14BH-L or equivalent (not provided)

•

Grounding cable, minimum 16 AWG (1.31 mm2) 90° C wire (not provided)

•

You ground the router by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points. To ground the router:

1. Verify that a licensed electrician has attached the cable lug provided with the router to the grounding cable.

2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.

3. Ensure that all grounding surfaces are clean and brought to a bright finish before grounding connections are made.

4. Connect the grounding cable to a proper earth ground.

5. Detach the ESD grounding strap from the site ESD grounding point.

6. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.

7. Place the grounding cable lug over the grounding points on the front of the chassis (see

g006419

Figure 17 on page 80).

8. Secure the grounding cable lug with the washers and screws. The holes are sized for SAE 10-32 screws. Apply 4 lb-in. (0.49 Nm) of torque to each screw. Do not overtighten the screw. (Use a number 2 Phillips screwdriver.)

CAUTION: Ensure that each grounding cable lug seats flush against the surface of

the grounding points as you are tightening the screws. Ensure that each screw is properly threaded into the grounding points. Applying installation torque to the screw when improperly threaded may result in damage to the terminal.

CAUTION: The maximum torque rating of the grounding screws on the router is

4 lb-in. (0.49 Nm). The grounding screws may be damaged if excessive torque is applied. Use only a torque-controlled driver to tighten screws. Use an appropriately sized driver, with a maximum torque capacity of 5 lb-in. or less. Ensure that the driver is undamaged and properly calibrated and that you have been trained in its use. You may wish to use a driver that is designed to prevent overtorque when the preset torque level is achieved.

9. Dress the grounding cable, and verify that it does not touch or block access to router components, and that it does not drape where people could trip on it.

Figure 17: Grounding Points on the ACX2200 Router

2—1— SAE 10-32 screws and washersGrounding lug

SEE ALSO

Installing and Connecting an ACX2200 Router Overview | 73

Prevention of Electrostatic Discharge Damage | 152

ACX2200 Power Overview | 42 ACX2200 Chassis Grounding Cable and Lug Specifications | 53

Connecting AC Power Cords to the ACX2200 Router

To connect AC power to the router, you need the following tools:

ESD grounding wrist strap

•

AC power cords

•

To connect AC power cords to the router:

1. Locate the power cords, which should have a plug appropriate for your geographical location. See the

“ACX2200 AC Power Specifications” on page 42.

2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.

3. Insert the appliance coupler end of the power cord into the appliance inlet on the power supply.

4. Insert the power cord plug into an external AC power source receptacle.

NOTE: Each power supply must be connected to a dedicated AC power feed and a dedicated

customer site circuit breaker. We recommend that you use a dedicated customer site circuit breaker rated for 2 A (100 VAC) or 1 A (240 VAC), or as required by local code.

5. Dress the power cord appropriately. Verify that the power cord does not block the air exhaust and access to router components, or drape where people could trip on it.

6. Repeat Step 1 through Step 5 for the remaining power supplies.

7. Observe the system LED on the router. If an AC power supply is functioning normally, the system LED lights green steadily. If the system LED is not lit, the power supply is not functioning normally. Repeat the cabling procedures.

Figure 18: Connecting AC Power to the Router

g006689

SEE ALSO

ACX2200 Power Overview | 42

Connecting DC Power Cables to the ACX2200 Router

To connect power to the router, you need the following tools:

Phillips (+) screwdriver, number 2

•

ESD grounding wrist strap

•

M3 screws and flat washers

•

DC power source cables, minimum 14 AWG or as required by local code (not provided)

•

Ring lugs, Molex 190700067 or equivalent (not provided)

•

The DC power supply has four terminals on the front panel, covered by a clear plastic cover.

WARNING: You must ground the router before connecting the DC power cables.

To connect the power cables:

1. Switch off the dedicated customer site circuit breakers. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.

2. Remove the clear plastic cover protecting the terminal on the faceplate.

3. Verify that the DC power cables are correctly labeled before making connections to the power supply. In a typical power distribution scheme where the return is connected to chassis ground at the battery plant, you can use a multimeter to verify the resistance of the –48V and return DC cables to chassis ground:

For –48V and –60V:

a. The cable with very large resistance (indicating an open circuit) to chassis ground is the DC input

cable (–).

b. The cable with very low resistance (indicating a closed circuit) to chassis ground is the return cable

(+).

For +24V:

a. The cable with very low resistance (indicating a closed circuit) to chassis ground is the DC input

cable (–).

b. The cable with very large resistance (indicating an open circuit) to chassis ground is the return cable

(+).

4. Remove the screws and flat washers from the terminals.

5. Secure each power cable lug to the terminal with the flat washers and screw (see Figure 19 on page 84). Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque to each screw. Do not overtighten the screw. (Use a number 2 Phillips screwdriver.)

a. Secure the positive DC source power cable lug to the return (+) terminal.

b. Secure the negative DC source power cable lug to the input (–) terminal.

CAUTION: Ensure that each power cable lug seats flush against the surface of the

terminal block as you are tightening the screws. Ensure that each screw is properly threaded into the terminal. Applying installation torque to the screw when improperly threaded may result in damage to the terminal.

CAUTION: The maximum torque rating of the terminal screws on the DC power

supply is 9 lb-in. (1.02 Nm). The terminal screws may be damaged if excessive torque is applied. Use only a torque-controlled driver to tighten screws on the DC power supply terminals. Use an appropriately sized driver, with a maximum torque capacity of 9 lb-in. or less. Ensure that the driver is undamaged and properly calibrated and that you have been trained in its use. You may wish to use a driver that is designed to prevent overtorque when the preset torque level is achieved.

6. Replace the clear plastic cover over the terminals on the faceplate.

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7. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.

8. Connect each DC power cable to the appropriate external DC power source.

NOTE: For information about connecting to external DC power sources, see the instructions

for your site.

9. Switch on the external circuit breakers to provide voltage to the DC power source cable leads. Observe the system LED on front of the router. If the DC power cable is correctly installed and functioning normally, the system LED lights green steadily. If the system LED indicates that the power supply is not functioning normally, repeat the installation and cabling procedures.

Figure 19: Connecting DC Power to the Router

SEE ALSO

ACX2200 Power Overview | 42

Installing and Connecting an ACX2200 Router Overview | 73 ACX2200 DC Power Specifications | 45

Connecting the ACX2200 to External Devices

IN THIS SECTION

Connecting ACX2200 Routers to Management Devices | 85

Connecting ACX2200 Routers to an External Alarm-Reporting Device | 87

Connecting ACX2200 Routers to External Clocking Devices | 88

Connecting ACX2200 Routers to Management Devices

IN THIS SECTION

Connecting the Router to a Network for Out-of-Band Management | 85

Connecting the Router to a Management Console or Auxiliary Device | 86

To connect external devices and cables to the router, you need the following tools:

RJ-45 Ethernet cable and RJ-45 to DB-9 serial port adapter (provided)

•

Management host, such as a PC, with an Ethernet port (not provided)

•

Connecting the Router to a Network for Out-of-Band Management

To connect to the MGMT port on the ACX2200 router:

1. Turn off the power to the management device.

2. Plug one end of the Ethernet cable into the MGMT port on the router. (Figure 20 on page 86 shows the connector. Figure 21 on page 86 shows the port.)

3. Plug the other end of the cable into the network device.

Figure 20: Ethernet Cable Connector

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Console Ser ver

CONSOLE/AUX

port

Figure 21: Ethernet Port

Connecting the Router to a Management Console or Auxiliary Device

You can connect a console, laptop, modem, or other auxiliary device by connecting a serial cable to the port on the front panel labeled CONSOLE/AUX. This port accepts a serial cable with an RJ-45 connector, which is provided with the router.

To connect a management console or auxiliary device:

1. Turn off the power to the console or auxiliary device.

2. Plug the RJ-45 end of the serial cable into the CONSOLE/AUX port on the front panel (Figure 22 on page 87 shows the connector. Figure 23 on page 87 shows the ports.)

3. Plug the DB-9 socket end into the device's serial port.

NOTE:

For console devices, configure the serial port to the following values:

Baud rate—9600

•

Parity—N

•

Data bits—8

•

Stop bits—1

•

Flow control—none

•

Figure 22: Routing Engine Console and Auxiliary Cable Connector

g006423

Console Ser ver

CONSOLE/AUX

port

Figure 23: Auxiliary and Console Connections

SEE ALSO

Installing and Connecting an ACX2200 Router Overview | 73

General Site Guidelines | 50

Management Port Connector Pinout Information for ACX Series Routers | 68

ACX2200 Chassis Grounding Cable and Lug Specifications | 53 Initially Configuring the ACX2200 Router | 90

Connecting ACX2200 Routers to an External Alarm-Reporting Device

To connect the router to external alarm-reporting devices, attach wires to the ALARM relay contacts on the front panel of the router. A system condition that triggers the red or yellow alarm on the router also activates the corresponding alarm relay contact.

The terminal blocks that plug into the alarm relay contacts are supplied with the router. They accept wire of any gauge between 20 AWG and 14 AWG (0.52 and 2.08 mm2), which is not provided. Use the gauge

of wire appropriate for the external device you are connecting.

To connect an external device to an alarm relay contact:

1. Prepare the required length of wire with gauge between 8 AWG and 14 AWG (0.08 and 2.08 mm2.

2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.

3. While the terminal block is not plugged into the relay contact, use a 2.5-mm flat-blade screwdriver to loosen the small screws on its side. With the small screws on its side facing left, insert wires into the slots in the front of the block based on the wiring for the external device. Tighten the screws to secure the wire.

4. Orient the terminal block according to the labels to the left of the appropriate relay contact (NC means “normally closed, C means “common,” and (NO means “normally open”).

5. Plug the terminal block into the relay contact and use a 2.5-mm flat-blade screwdriver to tighten the screws on the face of the block.

6. Attach the other end of the wires to the external device.

If attaching a reporting device for the other kind of alarm, repeat the procedure.

SEE ALSO

Alarm Contact Connector Pinouts | 65 Alarm Contact Port on the ACX2200 Router | 36

Connecting ACX2200 Routers to External Clocking Devices

IN THIS SECTION

Connecting 1-PPS and 10-MHz Timing Devices to the Router | 88

Connecting a T1 or E1 External Clocking Device to the Router | 89

ACX2200 routers support external clock synchronization for Synchronous Ethernet, T1 or E1 line timing sources, and external inputs.

Connecting 1-PPS and 10-MHz Timing Devices to the Router

The router has four SMB connectors that support 1-PPS and 10-MHz timing devices.

NOTE: Ensure that a cable of 3m or less in length is used for the 10-MHz and 1-PPS connectors.

To connect the SMB coaxial cable to the external clocking input port:

1. Connect one end of the SMB coaxial cable to either the 1-PPS SMB connector or the 10-MHz SMB connector on the router.

2. Connect the other end of the SMB coaxial cable to the 10-MHz or 1-PPS source network equipment.

NOTE: Ensure that the 10-MHz / 1-PPS sources are 50 ohms LVCMOS / LVTTL (3.3v)

compatible.

Connecting a T1 or E1 External Clocking Device to the Router

The router contains an external building-integrated timing system (BITS) timing port labeled EXT REF CLK IN on the front panel of the router.

To connect the router to a BITS T1/E1 external clocking device:

1. Attach an electrostatic discharge (ESD) grounding trap on your bare wrist, and connect the strap to one of the ESD points on the chassis.

2. Plug one end of the RJ-45 cable into the internal clock port on the craft interface.

3. Plug the other end of the RJ-45 cable into the T1 or E1 external clocking device.

4. Verify that the LEDs for the external clock input is lit steadily green.

5. Configure the port. See:

Initially Configuring the ACX2200 Router on page 90

•

Configuring External Clock Synchronization for ACX Series Routers

•

6. Issue the show chassis synchronization command to check the status of the port.

user@host> show chassis synchronization

Clock Synchronization Status : Clock module on CB 0

Current state : master Current clock state : internal Selected for : 13 days, 23 hours, 15 minutes, 17 seconds Selected since : 2012-10-29 18:28:35 EDT Deviation (in ppm) : +0.00 Last deviation (in ppm): +0.00 Clock Synchronization Status : Clock module on CB 1 Current state : backup Current clock state : locked to master CB Selected for : 13 days, 23 hours, 14 minutes, 23 seconds Selected since : 2012-10-29 18:29:29 EDT

SEE ALSO

Clocking Ports on the ACX2200 Router | 37 Clocking Port Specifications on the ACX2200 Router | 70

Initially Configuring the ACX2200 Router

The ACX2200 router ships with Junos OS preinstalled and ready to be configured when the router is powered on. One 4-GB internal NAND Flash memory device is divided into two partitions (da0s1 and da0s2). One partition is marked as the active partition, and the other partition functions as an alternate partition. The NAND Flash device acts as the hard drive. Two USB ports on the front panel accept USB storage devices (usb0 and usb1) that can also function as alternate boot devices.

When the router boots, it first attempts to start the image on the USB Flash memory device. If a USB Flash memory device is not inserted into the router or the attempt otherwise fails, the router next tries the active partition on the NAND Flash device, and then tries the alternate partition on the NAND Flash device.

You configure the router by issuing Junos OS command-line interface (CLI) commands, either on a console device attached to the CONSOLE/AUX port on the front panel, or over a telnet connection to a network connected to the Routing Engine MGMT port on the front panel.

Gather the following information before configuring the router:

Name that the router will use on the network

•

Domain name that the router will use

•

IP address and prefix length information for the Ethernet interface

•

IP address of a default router

•

IP address of a DNS server

•

Password for the root user

•

This procedure connects the router to the network but does not enable it to forward traffic. For complete information about enabling the router to forward traffic, including examples, see the Junos OS configuration guides.

To configure the software:

1. Verify that the router is powered on.

2. Log in as the “root” user. There is no password.

3. Start the CLI.

root# cli root@>

4. Enter configuration mode.

cli> configure [edit] root@#

5. Configure the name of the router. If the name includes spaces, enclose the name in quotation marks (“ ”).

[edit] root@# set system host-name host-name

6. Create a management console user account.

[edit] root@# set system login user user-name authentication plain-text-password New password: password Retype new password: password

7. Set the user account class to super-user.

[edit] root@# set system login user user-name class super-user

8. Configure the router’s domain name.

[edit] root@# set system domain-name domain-name

9. Configure the IP address and prefix length for the router’s Ethernet interface.

[edit] root@# set interfaces fxp0 unit 0 family inet address address/prefix-length

10. Configure the IP address of a backup router, which is used only while the routing protocol is not running.

[edit] root@# set system backup-router address

11. Configure the IP address of a DNS server.

[edit] root@# set system name-server address

12. Set the root authentication password by entering either a clear-text password, an encrypted password, or an SSH public key string (DSA or RSA).

[edit] root@# set system root-authentication plain-text-password New password: password Retype new password: password

[edit] root@# set system root-authentication encrypted-password encrypted-password

[edit] root@# set system root-authentication ssh-dsa public-key

[edit] root@# set system root-authentication ssh-rsa public-key

13. (Optional) Configure the static routes to remote subnets with access to the management port. Access to the management port is limited to the local subnet. To access the management port from a remote subnet, you need to add a static route to that subnet within the routing table. For more information about static routes, see the Junos OS Administration Library.

[edit] root@# set routing-options static route remote-subnet next-hop destination-IP retain no-readvertise

14. Configure the telnet service at the [edit system services] hierarchy level.

[edit] root@# set system services telnet

15. (Optional) Display the configuration to verify that it is correct.

[edit] root@# show system {

host-name host-name; domain-name domain-name; backup-router address; root-authentication {

authentication-method (password | public-key); } name-server {

address; }

} interfaces {

fxp0 {

unit 0 {

family inet {

address address/prefix-length;

}

} }

}

16. Commit the configuration to activate it on the router.

[edit] root@# commit

17. (Optional) Configure additional properties by adding the necessary configuration statements. Then commit the changes to activate them on the router.

[edit] root@host# commit

18. When you have finished configuring the router, exit configuration mode.

[edit] root@host# exit root@host>

RELATED DOCUMENTATION

ACX2200 Routers Hardware and CLI Terminology Mapping | 19 Protocols and Applications Supported by the ACX2200 Router | 23

CHAPTER

Maintaining Components

Maintaining ACX2200 Components | 96

Maintaining ACX2200 Components

IN THIS SECTION

Routine Maintenance Procedures for the ACX2200 Router | 96

Maintaining Cables That Connect to ACX2200 Network Ports | 96

Maintaining the ACX2200 Uplink Ports | 97

Replacing ACX2200 Hardware Components | 98

Routine Maintenance Procedures for the ACX2200 Router

Purpose

For optimum router performance, perform preventive maintenance procedures.

Action

Inspect the installation site for moisture, loose wires or cables, and excessive dust. Make sure that airflow

•

is unobstructed around the router and into the air intake vents.

Check the status-reporting devices on the font panel—system LED.

•

Maintaining Cables That Connect to ACX2200 Network Ports

Purpose

For optimum router performance, verify the condition of the cables that connect to the network ports.

Action

On a regular basis:

Place excess cable out of the way. Do not allow fastened loops of cable to dangle from the connector,

•

because this stresses the cable at the fastening point. Putting fasteners on the loops helps to maintain their shape.

Keep the cable connections clean and free of dust and other particles, which can cause drops in the

•

received power level. Always inspect cables, and clean them if necessary before connecting an interface.

Label both ends of the cables to identify them.

•

The following guidelines apply specifically to fiber-optic cables:

When you unplug a fiber-optic cable, always place a rubber safety plug over the transceiver on the

•

faceplate and on the end of the cable.

Anchor fiber-optic cables to avoid stress on the connectors. Be sure to secure fiber-optic cables so that

•

they do not support their own weight as they hang to the floor. Never let fiber-optic cable hang free from the connector.

Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a few inches can damage

•

the cable and cause problems that are difficult to diagnose.

Frequent plugging and unplugging of fiber-optic cable into and out of optical instruments can cause

•

damage to the instruments that is expensive to repair. Instead, attach a short fiber extension to the optical equipment. Any wear and tear due to frequent plugging and unplugging is then absorbed by the short fiber extension, which is easy and inexpensive to replace.

Keep fiber-optic cable connections clean. Small microdeposits of oil and dust in the canal of the transceiver

•

or cable connector could cause loss of light, reducing signal power and possibly causing intermittent problems with the optical connection.

To clean the transceivers, use an appropriate fiber-cleaning device, such as RIFOCS Fiber Optic Adaptor Cleaning Wands (part number 946). Follow the directions for the cleaning kit you use.

After you clean an optical transceiver, make sure that the connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free fiber-optic cable cleaning kit, such as the Opptex Cletop-S Fiber Cleaner. Follow the directions for the cleaning kit you use.

SEE ALSO

Troubleshooting Resources for ACX2200 Routers | 107

Maintaining the ACX2200 Uplink Ports

Purpose

For optimum performance, verify the condition of the uplink ports.

Action

On a regular basis:

Check the port LEDs. The meaning of the LED states differs for various uplink ports. For more information,

•

see “LEDs on ACX2200 Routers” on page 38. If the router detects a port failure, the router generates an alarm message to be sent to the Routing Engine.

A green status LED indicates that the port is functioning normally.

From the CLI, issue the show chassis fpc pic-status command.

•

user@host> show chassis fpc pic-status

Slot 0 Online PIC 0 Online 4x 1GE(LAN) RJ45 PIC 1 Online 4x 1GE(LAN) SFP, RJ45 PIC 2 Online 2x 1GE(LAN) SFP PIC 3 Online 2x 10GE(LAN) SFP+

SEE ALSO

ACX2200 Routers Hardware and CLI Terminology Mapping | 19 Troubleshooting Resources for ACX2200 Routers | 107

Replacing ACX2200 Hardware Components

IN THIS SECTION

Replacing an ACX2200 Console or Auxiliary Cable | 98

Replacing an ACX2200 Management Ethernet Cable | 99

Replacing an ACX2200 Fiber-Optic Cable | 100

Replacing an ACX2200 Transceiver | 102

Replacing an ACX2200 Console or Auxiliary Cable

Removing an ACX2200 Console or Auxiliary Cable | 98

Installing an ACX2200 Console or Auxiliary Cable | 99

Removing an ACX2200 Console or Auxiliary Cable

To remove a serial cable connected to a console or auxiliary device:

1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.

2. Press the tab on the connector, and pull the connector straight out of the CONSOLE/AUX port.

Figure 24 on page 99 shows the connector.

3. Disconnect the cable from the console or auxiliary device.

Figure 24: Ethernet Cable Connectors

Installing an ACX2200 Console or Auxiliary Cable

The CONSOLE/AUX port on the front panel of the router accepts an RS-232 (EIA-232) serial cable with RJ-45 connectors.

To connect a cable between the router and the console or auxiliary device:

1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.

2. Connect one end of the replacement cable into the CONSOLE/AUX port.

3. Plug the other end of the cable into the device's serial port.

Replacing an ACX2200 Management Ethernet Cable

Removing an ACX2200 Management Ethernet Cable | 99

Installing an ACX2200 Management Ethernet Cable | 100

Removing an ACX2200 Management Ethernet Cable

To remove a serial cable connected to a management device:

1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.

2. Press the tab on the connector, and pull the connector straight out of the MGMT port.

Figure 25 on page 100 shows the connector.

3. Disconnect the cable from the network device.

Figure 25: Ethernet Cable Connectors

Installing an ACX2200 Management Ethernet Cable

To install a serial cable connected to a management device:

1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.

2. Plug one end of the replacement cable into the appropriate MGMT port.

3. Plug the other end of the cable into the network device.

Replacing an ACX2200 Fiber-Optic Cable

100

Disconnecting an ACX2200 Fiber-Optic Cable | 100

Connecting an ACX2200 Fiber-Optic Cable | 101

Disconnecting an ACX2200 Fiber-Optic Cable

ACX Series routers have field-replaceable unit (FRU) optical transceivers to which you can connect fiber-optic cables.

Before you begin disconnecting a fiber-optic cable from an optical transceiver installed in an ACX Series router, ensure that you have taken the necessary precautions for safe handling of lasers (see “Radiation

from Open Port Apertures Warning” on page 138 and “Laser and LED Safety Guidelines and Warnings” on page 139).

Ensure that you have the following parts and tools available:

A rubber safety cap to cover the transceiver

•

A rubber safety cap to cover the fiber-optic cable connector

•

Juniper ACX2200 Hardware Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

About the Documentation

Documentation and Release Notes

Using the Examples in This Manual

Merging a Full Example

Merging a Snippet

Documentation Conventions

Documentation Feedback

Requesting Technical Support

Self-Help Online Tools and Resources

Creating a Service Request with JTAC

Overview

ACX2200 System Overview

ACX2200 Universal Metro Router Overview

Benefits of the ACX2200 Router

Chassis Description

ACX2200 Routers Hardware and CLI Terminology Mapping

Packet Flow on ACX Series Routers

Protocols and Applications Supported by the ACX2200 Router

ACX2200 Chassis Components

Front Panel of an ACX2200 Router

Uplink Ports on ACX2200 Routers

Gigabit Ethernet RJ-45 Ports

Gigabit Ethernet SFP Ports

10-Gigabit Ethernet SFP+ Ports

Alarm Contact Port on the ACX2200 Router

Clocking Ports on the ACX2200 Router

LEDs on ACX2200 Routers

System LED on the Front Panel

Ethernet Port LEDs

SFP and SFP+ Port LEDs

Management and Console Port LEDs on the Front Panel

Cooling System and Airflow in an ACX2200 Router

ACX2200 Power System

ACX2200 Power Overview

ACX2200 AC Power Specifications

ACX2200 AC Power Cord Specifications

ACX2200 DC Power Specifications

Site Preparation Checklist for ACX2200 Routers

ACX2200 Site Guidelines and Requirements

General Site Guidelines

Site Electrical Wiring Guidelines

Chassis Physical Specifications for ACX2200 Routers

ACX2200 Router Environmental Specifications

ACX2200 Chassis Grounding Cable and Lug Specifications

Grounding Points Specifications

Grounding Cable Lug Specifications

Grounding Cable Specifications

Cabinet Requirements for ACX2200 Routers

Rack Requirements for ACX2200 Routers

ACX2200 Network Cable and Transceiver Planning

Determining Transceiver Support and Specifications

Calculating Power Budget and Power Margin for Fiber-Optic Cables

How to Calculate Power Budget for Fiber-Optic Cable

How to Calculate Power Margin for Fiber-Optic Cable

Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable

Attenuation and Dispersion in Fiber-Optic Cable

ACX2200 Alarm, Management, and Clocking Cable Specifications and Pinouts

Alarm Contact Connector Pinouts

Management Port Connector Pinout Information for ACX Series Routers

Console or Auxiliary Port Connector Pinout on ACX Series Routers

USB Port Specifications for an ACX Series Router

Clocking Port Specifications on the ACX2200 Router

External Clocking Port Connector Specifications

External Clocking Input Port Specifications

Initial Installation and Configuration

Installing and Connecting an ACX2200 Router Overview

Unpacking and Mounting the ACX2200

Unpacking an ACX2200 Router

Parts Inventory (Packing List) for an ACX2200 Router

Installing the ACX2200 Mounting Brackets

Installing the ACX2200 Router in the Rack

Connecting the ACX2200 to Power

Connecting the ACX2200 Router to Earth Ground

Connecting AC Power Cords to the ACX2200 Router