Juniper EX4650 User Manual

EX4650 Switch Hardware Guide

Published

2021-03-07

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.

EX4650 Switch 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 | x

Documentation and Release Notes | x

Using the Examples in This Manual | x

Merging a Full Example | xi

Merging a Snippet | xii

Documentation Conventions | xii

Documentation Feedback | xv

Requesting Technical Support | xv

Self-Help Online Tools and Resources | xvi

Creating a Service Request with JTAC | xvi

iii

Overview

EX4650 Switches System Overview | 18

EX4650 Switches Hardware Overview | 18

Benefits of the EX4650 Switch | 19

Software | 19

EX4650 Switch First View | 20

Virtual Chassis | 23

Power Supplies | 24

Cooling System | 25

EX4650 Switch Models | 25

Identifying EX4650 Switch Models | 27

Chassis Physical Specifications for EX4650 Switches | 28

Field-Replaceable Units in EX4650 Switches | 28

EX4650 Chassis | 29

Chassis Status LEDs on EX4650 Switches | 29

Management Port LEDs on EX4650 Switches | 31

Access Port and Uplink Port LEDs on EX4650 Switches | 31

EX4650 Cooling System | 33

Fan Modules | 34

Airflow Direction in EX4650 Switch Models | 35

Front-to-Back Airflow | 36

Back-to-Front Airflow | 37

Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch | 38

Positioning the Switch | 39

Fan Module Status | 39

EX4650 Power System | 40

AC Power Supply in EX4650 Switches | 40

DC Power Supply in EX4650 Switches | 41

Airflow Direction in Power Supplies | 42

AC Power Supply Specifications for EX4650 Switches | 43

AC Power Cord Specifications for EX4650 Switches | 44

AC Power Supply LEDs in EX4650 Switches | 46

DC Power Supply in EX4650 Switches | 47

Characteristics of a DC Power Supply | 48

DC Power Supply Airflow | 49

DC Power Supply in EX4650 Switches | 50

Airflow Direction in Power Supplies | 51

EX4650 DC Power Specifications | 52

DC Power Supply LEDs in EX4650 Switches | 53

Site Planning, Preparation, and Specifications

Site Preparation Checklist for EX4650 Switches | 56

EX4650 Site Guidelines and Requirements | 57

Environmental Requirements and Specifications for EX4650 Switches | 57

General Site Guidelines | 59

Site Electrical Wiring Guidelines | 59

Rack Requirements for EX4650 Switches | 60

Cabinet Requirements for EX4650 Switches | 61

Clearance Requirements for Airflow and Hardware Maintenance for EX4650 Switches | 62

EX4650 Network Cable and Transceiver Planning | 64

Pluggable Transceivers Supported on EX4650 Switches | 64

SFP28 Direct Attach Copper Cables for EX4650 Switches | 65

Cable Specifications | 66

Standards Supported by These Cables | 66

QSFP28 Direct Attach Copper Cables for EX4650 Switches | 67

Cable Specifications | 67

Calculating the Fiber-Optic Cable Power Budget for EX Series Devices | 68

Calculating the Fiber-Optic Cable Power Margin for EX Series Devices | 68

EX4650 Management Cable Specifications and Pinouts | 70

Console Port Connector Pinout Information | 70

RJ-45 Management Port Connector Pinout Information | 71

RJ-45 to DB-9 Serial Port Adapter Pinout Information | 72

QSFP+, QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information | 72

Initial Installation and Configuration

Unpacking and Mounting the EX4650 Switch | 78

Unpacking the Switch | 78

Parts Inventory (Packing List) for an EX4650 Switch | 79

Mounting an EX4650 Switch on Four Posts of a Rack or Cabinet | 80

Connecting the EX4650 to Power | 84

Connect the EX4650 Switch to Earth Ground | 84

Connecting AC Power to an EX4650 Switch | 86

Connecting DC Power to an EX4650 Switch | 88

Connecting the EX4650 to the Network | 93

Install a Transceiver | 93

Connect a Fiber-Optic Cable | 96

Connecting the EX4650 to External Devices | 97

Connect a Device to a Network for Out-of-Band Management | 97

Connect a Device to a Management Console Using an RJ-45 Connector | 98

Configuring Junos OS on the EX4650 | 100

EX4650 Switch Default Configuration | 100

Connecting and Configuring an EX4650 Switch | 101

Maintaining Components

Maintaining the EX4650 Cooling System | 106

Removing a Fan Module from an EX4650 Switch | 106

Installing a Fan Module in an EX4650 Switch | 107

Maintaining the EX4650 Power System | 109

Removing a Power Supply from an EX4650 Switch | 109

Installing an AC Power Supply in an EX4650 Switch | 111

Maintain Transceivers | 112

Remove a Transceiver | 113

Remove a QSFP28 Transceiver | 116

Install a Transceiver | 118

Install a QSFP28 Transceiver | 120

Maintain Fiber-Optic Cables | 122

Connect a Fiber-Optic Cable | 122

Disconnect a Fiber-Optic Cable | 123

How to Handle Fiber-Optic Cables | 124

Troubleshooting Hardware

Troubleshooting the EX4650 Components | 127

Alarm Types and Severity Levels | 127

Interface Alarm Messages | 128

Create an Emergency Boot Device | 129

Contacting Customer Support and Returning the Chassis or Components

Returning an EX4650 Chassis or Components | 132

Returning an EX4650 Switch or Component for Repair or Replacement | 132

Locating the Serial Number on an EX4650 Switch or Component | 133

Listing the Switch and Components Details using the CLI | 133

Locating the Chassis Serial Number ID Label on an EX4650 Switch | 134

Locating the Serial Number ID Labels on FRUs in an EX4650 Switch | 134

Contact Customer Support to Obtain Return Material Authorization | 135

Packing an EX4650 Switch or Component for Shipping | 136

Packing an EX4650 Switch for Shipping | 136

Packing EX4650 Switch Components for Shipping | 138

Safety and Compliance Information

vii

General Safety Guidelines and Warnings | 141

Definitions of Safety Warning Levels | 142

Qualified Personnel Warning | 145

Warning Statement for Norway and Sweden | 146

Fire Safety Requirements | 146

Fire Suppression | 146

Fire Suppression Equipment | 146

Installation Instructions Warning | 148

Chassis and Component Lifting Guidelines | 148

Restricted Access Warning | 150

Ramp Warning | 152

Rack-Mounting and Cabinet-Mounting Warnings | 153

Grounded Equipment Warning | 159

Radiation from Open Port Apertures Warning | 160

Laser and LED Safety Guidelines and Warnings | 161

General Laser Safety Guidelines | 161

Class 1 Laser Product Warning | 162

Class 1 LED Product Warning | 163

Laser Beam Warning | 164

Maintenance and Operational Safety Guidelines and Warnings | 164

Battery Handling Warning | 166

Jewelry Removal Warning | 167

Lightning Activity Warning | 169

Operating Temperature Warning | 170

Product Disposal Warning | 172

viii

General Electrical Safety Guidelines and Warnings | 173

Action to Take After an Electrical Accident | 174

Prevention of Electrostatic Discharge Damage | 175

AC Power Electrical Safety Guidelines | 176

AC Power Disconnection Warning | 178

DC Power Electrical Safety Guidelines | 179

DC Power Disconnection Warning | 180

DC Power Grounding Requirements and Warning | 182

DC Power Wiring Sequence Warning | 184

DC Power Wiring Terminations Warning | 187

Multiple Power Supplies Disconnection Warning | 190

TN Power Warning | 191

Agency Approvals for EX4650 Switches | 191

Compliance Statements for EMC Requirements for EX Series Switches | 193

Canada | 193

Taiwan | 194

European Community | 194

Israel | 194

Japan | 195

Korea | 195

United States | 195

FCC Part 15 Statement | 196

Nonregulatory Environmental Standards | 196

About the Documentation

IN THIS SECTION

Documentation and Release Notes | x

Using the Examples in This Manual | x

Documentation Conventions | xii

Documentation Feedback | xv

Requesting Technical Support | xv

Use this guide to install hardware and perform initial software configuration, routine maintenance, and troubleshooting for the EX4650 switch. 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]

xii

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 xiii defines notice icons used in this guide.

Table 1: Notice Icons

xiii

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 xiii 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)

xiv

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)

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/

•

xvi

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

EX4650 Switches System Overview | 18

EX4650 Chassis | 29

EX4650 Cooling System | 33

EX4650 Power System | 40

EX4650 Switches System Overview

IN THIS SECTION

EX4650 Switches Hardware Overview | 18

EX4650 Switch Models | 25

Identifying EX4650 Switch Models | 27

Chassis Physical Specifications for EX4650 Switches | 28

Field-Replaceable Units in EX4650 Switches | 28

EX4650 Switches Hardware Overview

IN THIS SECTION

Benefits of the EX4650 Switch | 19

Software | 19

EX4650 Switch First View | 20

Virtual Chassis | 23

Power Supplies | 24

Cooling System | 25

Juniper Networks EX4650 Ethernet Switches provide connectivity for high-density environments, scalability for growing networks, and redundancy. The EX4650 provides the flexibility to support mixed 1-Gigabit Ethernet, 10-Gigabit Ethernet, 25-Gigabit Ethernet, 40-Gigabit Ethernet, and 100-Gigabit Ethernet environments.

You can interconnect EX4650 switches to form a Virtual Chassis. You can operate these interconnected switches as a single, logical device with a single IP address. You can use EX4650 as a distribution switch with virtual chassis capability, as a satellite device for Junos Fusion Enterprise, and as an aggregation switch.

The EX4650 switch is available as a fixed-configuration switch with the following built-in ports:

Forty-eight 25-Gigabit Ethernet ports that can operate at 1-Gbps, 10-Gbps, or 25-Gbps speed and

•

support SFP, SFP+, or SFP28 transceivers.

Eight 100-Gigabit Ethernet ports that can operate at 40-Gbps or 100-Gbps speed and support QSFP+

•

or QSFP28 transceivers. When these ports operate at 40-Gbps speed, you can configure four 10-Gbps interfaces and connect breakout cables, increasing the total number of supported 10-Gbps ports to 80. When these ports operate at 100-Gbps speed, you can configure four 25-Gbps interfaces and connect breakout cables, increasing the total number of supported 25-Gbps ports to 80.

Four models are available: two featuring AC power supplies and front-to-back or back-to-front airflow and two featuring DC power supplies and front-to-back or back-to-front airflow.

Benefits of the EX4650 Switch

EVPN-VXLAN campus architecture—The EX4650 switch extends EVPN-VXLAN beyond the data center, thus providing customers the building blocks for an enterprise-wide fabric. The EVPN-VXLAN protocol is suitable for campus architectures because it provides Layer 3 transport with Layer 2 capabilities that allow enterprises to evolve, while also taking into consideration legacy applications. EX4650 also offers core aggregation capabilities aimed at enterprises with campus networks that want a compact and highly scalable solution.

Industry-leading 25-Gbps and 100-Gbps wire speeds: The EX4650 Switch offers industry-leading high density 25-Gbps and 100-Gbps wire speeds that support 48 ports at 100-Gbps or 48 ports at 25-Gbps, and 8 100-Gbps uplink ports.

Support for Virtual Chassis—EX4650 switches support virtual chassis technology. You can interconnect up to two or four QFX5120-48Y switches in a QFX5120-48Y virtual chassis.

Common data center protocols: Like the EX9000 series, the EX4650 also uses data center network protocols. The network protocols used in the EX4650 are the Ethernet VPN (EVPN) and the Virtual Extensible LAN (VXLAN). Engineers typically use it with the Border Gateway Protocol and the VXLAN encapsulation protocol which creates an overlay network on an existing Layer 3 infrastructure. As a result, the same engineering team can manage the data center and the campus.

Software

Juniper Networks EX Series Ethernet Switches run Junos OS™, which provides Layer 2 and Layer 3 switching, routing, and security services. The same Junos OS code base that runs on EX Series switches also runs on all Juniper Networks M Series, MX Series, and T Series routers, and SRX Series Services Gateways.

EX4650 Switch First View

g022501

The EX4650 switch has a 1 U form factor and is shipped with redundant fans (4+1) and redundant power supplies (1+1).

The EX4650 switch is a 25-Gigabit Ethernet enhanced small form-factor (SFP28) switch with 48 SFP28 ports and 8 100-Gbps quad small form-factor (QSFP28) pluggable ports. Each SFP28 port can operate as a native 25-Gigabit Ethernet port, 10-Gigabit Ethernet port, and can act as a 1-Gbps port based on the transceivers inserted. Each of the eight uplink ports can operate as either 100-G or 40-G based on the optics used. They can also be used as 25-Gbps ports or 10-Gbps ports using breakout cables or channelization.

NOTE:

The SFP-T transceivers are supported only on top or bottom ports, upto a maximum of 24

•

ports

The SFP28 speed can be applied only for individual quads (four ports). The speed cannot be

•

configured for a single port.

CAUTION: Do not install 1GbE copper transceivers, such as QFX-SFP-1GE-T directly

above or below another copper transceiver. Use only the top row or bottom row to avoid damage to the device by some types of copper transceivers when the transceivers are installed adjacent to each other. If you use copper transceivers with the OEM part number FCLF8521P2BTL-J1 printed on the transceiver label, you can install the transceivers in any port with no restrictions.

For more information on how to channelize interfaces on EX4650-48Y switches, see Channelizing Interfaces on EX4650-48Y Switches.

Figure 1 on page 20 and Figure 2 on page 21 show the front panel of an EX4650 switch.

Figure 1: Front Panel of an EX4650 Switch

Figure 2 on page 21 shows the components on the front panel of an EX4650 switch.

Figure 2: Components on the Front Panel of an EX4650 Switch

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2—1— QSFP28 portsSFP28 ports

Figure 3 on page 21 shows the rear panel of an EX4650 Switch with AC power supplies.

Figure 3: Rear Panel of an AC-Powered EX4650 Switch

Figure 4 on page 21 shows the rear view of an EX4650 Switch with DC power supplies.

Figure 4: Rear Panel of a DC-Powered EX4650 Switch

Figure 5 on page 22 shows the components on the rear panel of an EX4650 Switch with AC power supplies.

Figure 5: Components on the Rear Panel of an AC-Powered EX4650 Switch

1 3 4

5 6

12 11 10 89 7 7

7—1— Power Supply LEDsChassis status LEDs (ALM, SYS, MST, ID)

8—2— Fan module LEDsConsole port

9—3— RJ-45 management port (C0)RJ-45 management port (C1)

10—4— RESET buttonESD point

11—5— USB portFan module

12—6— CLEI labelPower supplies

Figure 6 on page 22 shows the components on the rear panel of an EX4650 with DC power supplies.

Figure 6: Components on the Rear Panel of a DC-Powered EX4650 Switch

7—1— Power supply LEDsChassis status LEDs (ALM, SYS, MST, ID)

8—2— Fan module LEDsConsole port

9—3— RJ-45 management port (C0)RJ-45 management port (C1)

10—4— RESET buttonESD point

11—5— USB portFan module

12—6— CLEI labelPower supplies

Table 3 on page 23 lists the EX4650 switch models and their components.

Table 3: Components in EX4650 Switches

Power Supply Shipped by Default

Two 650 W AC power supplies (1+1 redundancy)

Two 650 W DC power supplies (1+1 redundancy)

EX4650-48Y-AFO

EX4650-48Y-AFI

EX4650-48Y-DC-AFO

EX4650-48Y-DC-AFI

48x25G SFP28 ports and 8x100G QSFP28 ports

Fan Modules Shipped by DefaultBuilt-in PortsSwitch Model

Five fan modules; each with an AFO label

Five fan modules; each with an AFI label

Five fan modules; each with an AFO label

Five fan modules; each with an AFI label

Virtual Chassis

The EX4650 switch can be used as a member in an all EX4650 virtual chassis.

Starting with Junos OS Release 19.3R1, you can interconnect up to two EX4650 switches in an EX4650

•

Virtual Chassis. The two-member switches must be in the primary and backup routing engine roles.

Starting with Junos OS Release 20.1R1, you can interconnect up to four EX4650 switches in an EX4650

•

Virtual Chassis. You should configure two member switches into the primary and backup Routing Engine roles, and the remaining member switches into the linecard role.

EX4650 switches can’t be combined with any other type of switches in a virtual chassis (mixed mode). EX4650 switches do not have dedicated or default-configured VCPs, but you can set any of the 40-Gbps QSFP+ or 100-Gbps QSFP28 uplink ports on the front panel (non-channelized ports 48 through 55) as VCPs. You can’t use any of the other ports (network ports 0 through 47) as VCPs. You can configure, monitor, and maintain it the same way as a EX Series virtual chassis. See the following topics for more details on how to configure and change the members in a EX4650 virtual chassis:

Understanding Virtual Chassis Components

•

Removing or Replacing a Member Switch of a Virtual Chassis Configuration

•

Adding a New Switch to an Existing EX4650 or QFX Series Virtual Chassis

•

Virtual Chassis Fabric Overview

•

Power Supplies

Each EX4650 switch supports two AC or two DC power supplies with either front-to-back or back-to-front airflow. Power supplies for the EX4650 switch are fully redundant, load-sharing, and hot-removable and hot-insertable field-replaceable units (FRUs). The EX4650 switch models are shipped with two power supplies preinstalled in the rear panel of the chassis.

The power supplies either have labels on the handles that indicate the airflow direction or they have color-coded handles with a fan icon.An AFI label or a blue-colored handle indicates back-to-front airflow while anAFO label or a gold-colored handle indicates front-to-back airflow. See Figure 7 on page 24

Figure 7: Power Supply Handle Detail

1—AFI label

CAUTION: Do not mix:

AC and DC power supplies in the same chassis.

•

Power supplies with different airflow labels (AFI and AFO) in the same chassis.

•

Power supplies and fan modules with different airflow labels (AFI) and (AFO)) in the

•

same chassis.

Verify that the airflow direction on the power supply handle matches the direction

•

of airflow in the chassis. Ensure that each power supply you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm.

If you need to convert the airflow pattern on a chassis, you must replace all the fans

•

and power supplies at one time to use the new direction.

Cooling System

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EX4650 switches are shipped with five fan modules (4+1 redundancy) located at the rear of the chassis. These fan modules are designed for one of the two available airflow directions. The fan modules are also color-coded to indicate the airflow direction.

Figure 8 on page 25 shows the EX4650 fan module.

Figure 8: EX4650 Fan Module

The five fan modules are numbered 0 through 4 counting from left to right. Each fan module slot has a fan icon and an LED next to it.

CAUTION: Do not mix:

AC and DC power supplies in the same chassis.

•

Power supplies with different airflow labels (AFI and AFO) in the same chassis.

•

Power supplies and fan modules with different airflow labels (AFI) and (AFO)) in the

•

same chassis.

EX4650 Switch Models

The EX4650 switch is available with 48 ports and supports AC and DC power supplies depending on the switch model. All models of the EX4650 ship with two power supplies and five fans installed by default.

Table 4 on page 26 lists the components shipped with EX4650 switch models.

Table 4: EX4650 Switch Models and Shipped Components

AirflowPower SupplyPortsSwitch Model

EX4650-48Y-AFO

EX4650-48Y-AFI

EX4650-48Y-DC-AFO

8 QSFP28

AC48 SFP28

DC48 SFP28

Front-to-back—air intake to cool the chassis is through the vents on the front panel of the chassis, and hot air exhausts through the vents on the rear panel of the chassis.

Back-to-front—air intake to cool the chassis is through the vents on the rear panel of the chassis, and hot air exhausts through the vents on the front panel of the chassis.

Front-to-back—air intake to cool the chassis is through the vents on the front panel of the chassis, and hot air exhausts through the vents on the rear panel of the chassis.

EX4650-48Y-DC-AFI

DC48 SFP28

8 QSFP28

Back-to-front—air intake to cool the chassis is through the vents on the rear panel of the chassis, and hot air exhausts through the vents on the front panel of the chassis.

CAUTION: Mixing different types (AC and DC) of power supplies in the same chassis

is not supported. Mixing different airflow modules in the same chassis is not supported.

Identifying EX4650 Switch Models

Purpose

Identify the model number of your EX4650 switch.

Action Check the value of the FRU Model Number field in the Routing Engine section in the output of the show

chassis hardware extensive CLI command.

user@switch> show chassis hardware extensive

....

Routing Engine 1 REV D 650-044930 PD3113060024 EX4650-48Y Jedec Code: 0x7fb0 EEPROM Version: 0x02 P/N: 650-044930 S/N: PD3113060024 Assembly ID: 0x0b5e Assembly Version: 03.19 Date: 02-19-2013 Assembly Flags: 0x00 Version: REV D CLEI Code: ID: EX4650-48Y FRU Model Number: EX4650-48Y-AFO

....

The model number of your switch is one of the following:

EX4650-48Y-AFO

•

EX4650-48Y-AFI

•

EX4650-48Y-DC-AFO

•

EX4650-48Y-DC-AFI

•

In the sample output, the switch model is EX4650-48Y-AFO.

Meaning

In EX4650 switch model numbers:

The 48Y in the model number indicates that the number of network ports on the switch:

•

AFI indicates that the switch is shipped with two fan modules and a power supply, each bearing an AIR

•

IN (AFI) label. Switches that do not have AFI in their model numbers ship with two fan modules and a power supply, each bearing an AIR OUT (AFO) label.

The labels on the fan modules and the power supplies indicate the direction of airflow they provide within the chassis when installed in the switch. AIR IN (AFI) labels indicate back-to-front airflow, and AIR OUT (AFO) labels indicate front-to-back airflow.

The DC in the model number indicates that the switch model works on DC power supply. Switches that

•

do not have DC in their model numbers work on AC power supply.

Chassis Physical Specifications for EX4650 Switches

The EX4650 switch chassis is a rigid sheet-metal structure that houses all components of the switch.

Table 5 on page 28 summarizes the physical specifications of the EX4650 switch chassis.

Table 5: Physical Specifications of the EX4650 Switch Chassis

ValueDescription

1.72 in. (4.37 cm)Chassis height

Chassis width

17.36 in. (44.09 cm)

•

The outer edges of the front-mounting brackets extend the width to 19 in.

•

(48.2 cm)

20.48 in. (52.02 cm) excluding fan and power supply handlesChassis depth

23.69 lbs (10.75 kg) with two power supplies and fans installedWeight

Field-Replaceable Units in EX4650 Switches

Field-replaceable units (FRUs) are components that you can replace at your site. The FRUs in EX4650 switches are hot-removable and hot-insertable – you can remove and replace them without powering off the switch. The FRUs in EX4650 switches are:

Power supplies

•

Fan modules

•

Transceivers

•

NOTE: Transceivers are not part of the shipping configuration. If you want to purchase

transceivers, you must order them separately.

NOTE: If you have a Juniper J-Care service contract, register any addition, change, or upgrade

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of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/. Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

EX4650 Chassis

IN THIS SECTION

Chassis Status LEDs on EX4650 Switches | 29

Management Port LEDs on EX4650 Switches | 31

Access Port and Uplink Port LEDs on EX4650 Switches | 31

Chassis Status LEDs on EX4650 Switches

EX4650 switches have four chassis status LEDs (labeled ALM, SYS, MST, and ID) (see Figure 9 on page 29).

Figure 9: Chassis Status LEDs in EX4650

1—Chassis status LEDs

Table 6 on page 30 describes the chassis status LEDs on an EX4650 switch, their colors and states, and

the status they indicate. You can view the colors of the three LEDs remotely through the CLI by issuing the operational mode command show chassis led.

Table 6: Chassis Status LEDs on an EX4650 Switch

State and DescriptionColorLED Label

There is no alarm or the switch is halted.UnlitALM (Alarm)

Red

Amber

There is a major alarm.

NOTE: A major hardware fault has occurred, such as a temperature alarm

or power failure, and the switch has halted. Power off the unit by setting the AC power source outlet to the OFF (O) position, or unplugging the AC power cords. Correct any voltage or site temperature issues, and allow the switch to cool down. Power on the unit switch and monitor the power supply and fan LEDs to help determine where the error is occurring. s the network link and turns off the ALM LED..)

There is a minor alarm.

NOTE: The Alarm (ALM) LED glows yellow if you commit a configuration

to make it active on the switch and do not also create a rescue configuration to back it up. To save the most recently committed configuration as the rescue configuration, enter the operational mode command request system configuration rescue save.

The switch is powered off or halted.UnlitSYS (System)

•

Junos OS for EFX Series is loaded on the switch.Green(On steadily)

Indicates a standalone EX4650 switch.Green(On steadily)MST (Primary)

UnlitID(Identification)

Blinking

The beacon feature is not enabled on the switch. This feature is enabled using the request chassis beacon command.

Blinking—The beacon feature is enabled.

The beacon feature is enabled on the switch. This feature is enabled using the request chassis beacon command

A major alarm (red) indicates a critical error condition that requires immediate action.

A minor alarm (yellow) indicates a noncritical condition that requires monitoring or maintenance. A minor alarm that is left unchecked might cause interruption in service or performance degradation.

All three LEDs can be lit simultaneously.

Management Port LEDs on EX4650 Switches

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The two management ports on the rear panel of an EX4650 switch have two LEDs that indicate Link/Activity and status of the management port.Figure 10 on page 31 shows the location of the management port.

Figure 10: LEDs on the Management Port

2—1— Link/Activity LEDStatus LED

Table 7 on page 31 describes the Link/Activity LED.

Table 7: Link/Activity LED on the management port on an EX4650 Switch

State and DescriptionColorLED

GreenLink/Activity

Green/AmberStatus

Blinking—The port and the link are active, and there is link activity.

•

On steadily—The port and the link are active, but there is no link activity.

•

Off—The port is not active.

•

Indicates the speed.

Off—Either the port speed is 10 M or the link is down.

•

Amber—Link speed is 100 Mbps.

•

Green—Link speed is 1000 Mbps.

•

Access Port and Uplink Port LEDs on EX4650 Switches

Each network port and SFP+ uplink port has two LEDs that show the link activity and status of the port. The built-in QSFP+ port on a EX4650 switch has one LED that shows both the link activity and status of the port.

The following figures in this topic shows the location of those LEDs:

Figure 11 on page 32 shows the location of the LEDs on the QSFP uplink ports.

•

Figure 12 on page 32 shows the location of the LEDs on the SFP network ports.

•

Figure 11: LEDs on Network Ports

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1 2

1—Network Port LEDs.

Figure 12: LEDs on the SFP+ Network Ports

2—1— Status LEDLink/Activity LED

The Table 8 on page 32 describes the link activity LED on network ports, SFP+ uplink ports, and built-in QSFP+ ports.

Table 8: Link/Activity LED

State and DescriptionColorLED

GreenLink activity

Blinking—The port and the link are active, and there is link activity.

•

On steadily—The port and the link are active, but there is no link activity.

•

Off—The port is not active.

•

Table 9 on page 33 describes the Status LED on SFP+ uplink ports.

Table 9: Status LED on SFP+ Uplink Ports

State and DescriptionLCD IndicatorLED

GreenStatus

Indicates the speed. The speed indicators are:

Blinking green—1 Gbps and 10 Gbps

•

Stable green—25 Gbps

•

Table 10 on page 33 describes the Status LED on QSFP+ ports in EX4650 switches.

Table 10: Status LED on QSFP+ Ports

State and DescriptionLCD IndicatorLED

GreenStatus

Indicates the status. The status indicators are:

Unlit—40-Gigabit port/100-Gigabit port is down.

•

Steadily green—40-Gigabit port is up.

•

EX4650 Cooling System

IN THIS SECTION

Fan Modules | 34

Airflow Direction in EX4650 Switch Models | 35

Front-to-Back Airflow | 36

Back-to-Front Airflow | 37

Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch | 38

Positioning the Switch | 39

Fan Module Status | 39

The cooling system in an EX4650 switch consists of five fan modules and each power supply has its own fans. The switch can be set up to work in one of two airflow directions depending on the fan modules and power supplies installed in the switch.

Back-to-front airflow (air enters through the back of the switch), indicated by the label AIR IN (AFI)

•

Front-to-back (air exhausts through the back of the switch), indicated by the label AIR OUT (AFO)

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•

CAUTION: Do not mix AFI and AFO fans and power supplies in the same chassis.

Fan Modules

The fan modules in EX4650 switches are hot-insertable and hot-removable FRUs. These fan modules are designed for one of the two available airflow directions (Airflow In or Airflow Out). The fan modules are also color-coded to indicate the airflow direction. The fan modules are installed in the fan module slots between the management panel and the power supplies.

Figure 13 on page 34 shows the EX4650 fan module.

Figure 13: EX4650 Fan Module

The five fan modules are numbered 0 through 4 counting from left to right. Each fan module slot has a fan icon and an LED next to it.

You must remove only one fan module at a time for replacement from the rear panel of the chassis. The switch continues to operate for a limited period of time (30 seconds) during the replacement of the fan module without thermal shutdown.

NOTE: All the five fan modules must be installed for optimal functioning of the switch.

The fan modules are available in four models that have different airflow directions—back-to-front (air enters through the back of the switch), indicated by the label AFI and azure blue color, and front-to-back

(air exhausts through the back of the switch), indicated by label AFO and gold color. Table 11 on page 35 lists the available fan module models and the direction of airflow in them.

Table 11: Fan Modules in EX4650 Switches

Direction of Label on the Fan ModuleFan Module

Color of the Fan Module

Airflow in the Fan

Module

Power Supplies

Juniper GoldAFOEX4650-FANAFO

Juniper Azure BlueAFIEX4650-FANAFI

Front-to-back—air

intake to cool the

chassis is through the

vents on the front

panel of the chassis,

and hot air exhausts

through the vents on

the rear panel of the

chassis.

Back-to-front—air

intake to cool the

chassis is through the

vents on the rear

panel of the chassis,

and hot air exhausts

through the vents on

the front panel of the

chassis.

You must install only power supplies that have AIR OUT(AFO) labels in switches that have fan modules with AIR OUT labels.

You must install only power supplies that have AIR IN(AFI) labels in switches that have fan modules with AIR IN labels.

Airflow Direction in EX4650 Switch Models

Table 12 on page 35 shows the direction of airflow in EX4650 switch models as shipped.

Table 12: Airflow Direction in EX4650 Switch Models

Direction of AirflowFan Modules and Power SupplyModel Number

EX4650-48Y-AFO

The switch ships with five fan modules and two AC power supplies, each with a label AIR OUT (AFO).

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Table 12: Airflow Direction in EX4650 Switch Models (continued)

Direction of AirflowFan Modules and Power SupplyModel Number

EX4650-48Y-AFI

EX4650-48Y-DC-AFO

EX4650-48Y-DC-AFI

CAUTION: Do not mix:

The switch ships with five fan modules and two AC power supplies, each with a label AIR IN (AFI).

The switch ships with five fan modules and two DC power supplies, each with a label AIR OUT (AFO).

The switch ships with five fan modules and two DC power supplies, each with a label AIR IN (AFI).

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

Do not mix:

•

AC and DC power supplies in the same chassis.

•

Power supplies with different airflow labels (AFI and AFO) in the same chassis.

•

Power supplies and fan modules with different airflow labels (AFI) and (AFO)) in

•

the same chassis.

Front-to-Back Airflow

In the EX4650 switch models that have front-to-back airflow, the air intake to cool the chassis is through the vents on the front panel of the switch and hot air exhausts through the vents on the rear panel (See

Figure 14 on page 37).

Figure 14: Front-to-Back Airflow Through EX4650 Switch Chassis

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Ports

FRUs

You must install only power supplies that have AIR OUT (AFO) labels in switches that have fan modules with AIR OUT (AFO) labels.

Back-to-Front Airflow

In the EX4650 switch models that have back-to-front airflow, the air intake to cool the chassis is through the vents on the rear panel and hot air exhausts through the vents on the front panel of the switch. See

Figure 15 on page 38.

Figure 15: Back-to-Front Airflow Through EX4650 Switch Chassis

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Ports

FRUs

You must install only power supplies that have AIR IN (AFI) labels in switches in which the fan modules have AIR IN (AFI) labels.

Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch

Do not mix power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis. If the fan modules have AIR IN (AFI) labels, the power supplies must also have AIR IN

(AFI) labels; if the fan modules have AIR OUT (AFO) labels, the power supplies must also have AIR OUT (AFO) labels.

The labels on the power supplies and fan modules should match the labels on the switch chassis.

Mixing components with AIR IN (AFI) and AIR OUT (AFO) labels in the same chassis hampers the performance of the cooling system of the switch and leads to overheating of the chassis.

CAUTION: The system raises an alarm if a fan module fails or if the ambient

temperature inside the chassis rises above the acceptable range. If the temperature inside the chassis rises above the threshold temperature, the system shuts down automatically.

Positioning the Switch

In front-to-back airflow, indicated by the label AIR OUT (AFO) on the fan modules and power supplies, hot air exhausts through the vents on the rear panel of the switch. In back-to-front airflow, indicated by the label AIR IN (AFI) on the fan modules and power supplies, hot air exhausts through the vents on the front panel of the switch.

In data center deployments, position the switch in such a manner that the AIR IN (AFI) labels on switch components are next to the cold aisle, and AIR OUT (AFO) labels on switch components are next to the hot aisle.

Fan Module Status

Each fan module in the switch has a status LED next to the fan module slot on the rear panel of the chassis, which indicated the fan module status.Table 13 on page 39 describes the status LED on the fan module in an EX4650 switch.

Table 13: Fan Module Status LED

DescriptionStateColorLED

The fan module is functioning normally.On steadilyGreenStatus

BlinkingAmber

Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors in the chassis monitor the temperature within the chassis.

The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises above the acceptable range. If the temperature inside the chassis rises above the threshold temperature, the system shuts down automatically.

An error has been detected in the fan module. Replace the fan module as soon as possible. Either the fan has failed or it is seated incorrectly. To maintain proper airflow through the chassis, leave the fan module installed in the chassis until you are ready to replace it.

EX4650 Power System

IN THIS SECTION

AC Power Supply in EX4650 Switches | 40

AC Power Supply Specifications for EX4650 Switches | 43

AC Power Cord Specifications for EX4650 Switches | 44

AC Power Supply LEDs in EX4650 Switches | 46

DC Power Supply in EX4650 Switches | 47

DC Power Supply in EX4650 Switches | 50

EX4650 DC Power Specifications | 52

DC Power Supply LEDs in EX4650 Switches | 53

AC Power Supply in EX4650 Switches

IN THIS SECTION

AC Power Supply in EX4650 Switches | 40

DC Power Supply in EX4650 Switches | 41

Airflow Direction in Power Supplies | 42

EX4650 switches support two AC or DC power supplies with different airflow directions. Power supplies for the EX4650 switch are fully redundant, load-sharing, and hot-removable and hot-insertable FRUs. The EX4650 switch models are shipped with two power supplies pre-installed in the rear panel of the chassis.

AC Power Supply in EX4650 Switches

EX4650 switch supports two 650 W AC power supplies.

Figure 16 on page 41 shows an AC power supply for an EX4650 switch.

Figure 16: AC Power Supply for an EX4650 Switch

DC Power Supply in EX4650 Switches

The DC power supply in EX4650 is 650 W with dual feeds for power resiliency. Figure 17 on page 41 shows a DC power supply for an EX4650 switch.

Figure 17: DC Power Supply for an EX4650 Switch

NOTE: The DC power supply in the switch has four terminals labeled V-, V-, V+, and V+ for

connecting DC power source cables labeled and negative (–) and positive (+). See

Figure 18 on page 42.

Figure 18: DC Power Supply Faceplate of an EX4650 Switch

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5—1— Fault LEDAFI

6—2— Ouput LEDInput terminals

7—3— Input LEDEjector lever

4—ESD grounding point

Airflow Direction in Power Supplies

Each power supply has two fan supplies and is cooled by its own internal cooling system.

The power supplies either have labels on the handles that indicate the direction of airflow or they have color-coded handles with a fan icon. AIR IN (AFI) label or a blue-colored handle indicates back-to-front airflow while AIR OUT (AFO) label or a gold-colored handle indicates front-to-back airflow. See

Figure 19 on page 42

Figure 19: Power Supply Handle Detail

1—AIR IN (AFI) label

Be sure to use the correct power supply for your chassis product SKU (see Table 14 on page 43).

CAUTION: Do not mix:

AC and DC power supplies in the same chassis.

•

Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the

•

same chassis.

Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR

•

OUT (AFO)) in the same chassis.

CAUTION: Verify that the airflow direction on the power supply handle matches the

direction of airflow in the chassis. Ensure that each power supply you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm. If you need to convert the airflow pattern on a chassis, you must replace all the fans and power supplies at one time to use the new direction.

Table 14 on page 43 lists the AC and DC power supplies used in EX4650 switches and the direction of

airflow in them.

Table 14: Airflow Direction in Power Supplies for EX4650 Switches

Color of Power Supply HandleDirection of AirflowProduct Number

Juniper GoldBack to frontEX4650-48S-AFO

Juniper Azure BlueFront to backEX4650-48S-AFI

Juniper GoldBack to frontEX4650-48S-DC-AFO

Juniper Azure BlueFront to backEX4650-48S-DC-AFI

AC Power Supply Specifications for EX4650 Switches

EX4650 switches support 650 W AC power supplies.

The table in this topic provides power supply specification of AC power supplies used in an EX4650 switch:

Table 15: Power Supply Specifications of 650 W AC Power Supplies for EX4650 Switches

SpecificationItem

Operating range: 100 VAC to 240 VACAC input voltage

50–60 HzAC input line frequency

AC input current rating

7.8A at 100-120 VAC

3.8A at 200-240 VAC

260WTypical Power Consumption

450WMaximum power

AC Power Cord Specifications for EX4650 Switches

A detachable AC power cord is supplied with the AC power supplies. The coupler is type C13 as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source outlet that is standard for your geographical location.

CAUTION: The AC power cord provided with each power supply is intended for use

with that power supply only and not for any other use.

NOTE: In North America, AC power cords must not exceed 4.5 meters 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). The cords supplied with the switch are in compliance.

Table 16 on page 44 gives the AC power cord specifications for the countries and regions listed in the

table.

Table 16: AC Power Cord Specifications

Juniper Model NumberPlug StandardsElectrical SpecificationsCountry/Region

CBL-EX-PWR-C13-ARIRAM 2073 Type RA/3250 VAC, 10 A, 50 HzArgentina

Table 16: AC Power Cord Specifications (continued)

Juniper Model NumberPlug StandardsElectrical SpecificationsCountry/Region

Switzerland, and United Kingdom)

Japan

Korea

250 VAC, 10 A, 50 HzAustralia

CBL-EX-PWR-C13-AUAS/NZZS 3112 Type

SAA/3

CBL-EX-PWR-C13-BRNBR 14136 Type BR/3250 VAC, 10 A, 50 HzBrazil

CBL-EX-PWR-C13-CHGB 1002-1996 Type PRC/3250 VAC, 10 A, 50 HzChina

CBL-EX-PWR-C13-EUCEE (7) VII Type VIIG250 VAC, 10 A, 50 HzEurope (except Italy,

CBL-EX-PWR-C13-INIS 1293 Type IND/3250 VAC, 10 A, 50 HzIndia

CBL-EX-PWR-C13-ILSI 32/1971 Type IL/3G250 VAC, 10 A, 50 HzIsrael

CBL-EX-PWR-C13-ITCEI 23-16 Type I/3G250 VAC, 10 A, 50 HzItaly

CBL-EX-PWR-C13-JPSS-00259 Type VCTF125 VAC, 12 A, 50 Hz or 60

CBL-EX-PWR-C13-KRCEE (7) VII Type VIIGK250 VAC, 10 A, 50 Hz or 60

CBL-EX-PWR-C13-USNEMA 5-15 Type N5-15125 VAC, 13 A, 60 HzNorth America

250 VAC, 10 A, 50 HzSouth Africa

ZA/13

Taiwan

50 Hz

CBL-EX-PWR-C13-SASABS 164/1:1992 Type

CBL-EX-PWR-C13-SZSEV 6534-2 Type 12G250 VAC, 10 A, 50 HzSwitzerland

CBL-EX-PWR-C13-TWNEMA 5-15P Type N5-15P125 VAC, 11 A and 15 A,

CBL-EX-PWR-C13-UKBS 1363/A Type BS89/13250 VAC, 10 A, 50 HzUnited Kingdom

Figure 20 on page 46 illustrates the plug on the power cord for some of the countries or regions listed in Table 16 on page 44.

Figure 20: AC Plug Types

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AC Power Supply LEDs in EX4650 Switches

Figure 21 on page 46 shows the location of the LEDs on an AC power supply for EX4650 switches.

Figure 21: LEDs on AC power supply for EX4650 switches

3—1— FaultAC OK

2—DC OK

Table 17 on page 46 describes the AC power supply LEDs.

Table 17: AC Power Supply LEDs in EX4650 Switches

DescriptionStateColorLED

OffUnlitAC OK

The power supply is disconnected from power, or power is not coming into the power supply.

Power is coming into the power supply.On steadilyGreen

Table 17: AC Power Supply LEDs in EX4650 Switches (continued)

DescriptionStateColorLED

OffUnlitDC OK

On steadilyGreen

On steadilyAmberFault

The power supply is disconnected from power, or power is not coming into the power supply.

The power supply is sending out power correctly.

An error has been detected in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.

NOTE: If the AC OK LED and the AC OK LED are not lit green, either the AC power cord is not

installed properly or the power input voltage is not within normal operating range.

If the AC OK LED is lit green and the AC OK LED is unlit or lit red, the AC power supply is installed properly, but the power supply has an internal failure.

DC Power Supply in EX4650 Switches

IN THIS SECTION

Characteristics of a DC Power Supply | 48

DC Power Supply Airflow | 49

The DC power supply in EX4650 switches is a hot-insertable and hot-removable field-replaceable unit (FRU): You can install it without powering off the switch or disrupting the switching function.

All the EX4650 switches that are powered by DC power supplies are shipped with one DC power supply pre-installed in the rear panel of the switches.

CAUTION: Do not mix:

AC and DC power supplies in the same chassis

•

Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the

•

same chassis.

Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the

•

same chassis.

Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR

•

OUT (AFO)) in the same chassis.

This topic includes:

Characteristics of a DC Power Supply

EX4650 switches support 550 W DC power supply (see Figure 22 on page 48).

Figure 22: DC Power Supply for an EX4650 Switch

You can install up to two DC power supplies in an EX4650 switch. Power supplies are installed in the power supply slots labeled PSU 0 and PSU 1 in the rear panel of the chassis.

Table 18 on page 48 lists the details of the 550 W DC power supplies used in EX4650 switches.

Table 18: Details of the DC Power Supplies in EX4650 Switches

550 W DC Power SupplyDetails

Model number

JPSU-550-DC-AFO-A

•

JPSU-550-DC-AFI-A

•

Hot-insertable and hot-removableField-replaceable unit (FRU) type

2.43 lb (1.1 kg)Power supply weight

1Minimum installed in chassis

Table 18: Details of the DC Power Supplies in EX4650 Switches (continued)

550 W DC Power SupplyDetails

2Maximum installed in chassis

Power supply slots

Airflow

Operating range

Install in power supply slots labeled PSU 0 and PSU 1 in the rear panel of the chassis.

InternalFans

Front-to-back, indicated by label AIR OUT (AFO)

•

Back-to-front, indicated by label AIR IN (AFI)

•

AC OK and DC OKPower supply status LEDs

4 ADC input current rating

–38 through –60 VDC

NOTE: The minimum input power required to power on the switch

is –43.5 +/– 0.5 VDC. After the switch is powered on, the operating range is –38 through –60 VDC.

DC Power Supply Airflow

Each power supply has its own fan and is cooled by its own internal cooling system.

Each power supply has a label AIR OUT (AFO) or AIR IN (AFI) on the faceplate of the power supply that indicates the direction of airflow in the power supply.

Table 19 on page 49 lists the DC power supply models and the direction of airflow in them.

Table 19: Airflow Direction in DC Power Supply Models for EX4650 Switches

Label on Power SupplyModel

AIR OUT (AFO)JPSU-550-DC-AFO-A

AIR IN (AFI)JPSU-550-DC-AFI-A

Direction of Airflow

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

DC Power Supply in EX4650 Switches

IN THIS SECTION

DC Power Supply in EX4650 Switches | 50

Airflow Direction in Power Supplies | 51

EX4650 switches support two DC power supplies with either front-to back or back-to-front airflow. Power supplies for the EX4650 switch are fully redundant, load-sharing, and hot-removable and hot-insertable FRUs. The EX4650 switch models are shipped with two power supplies preinstalled in the rear panel of the chassis.

DC Power Supply in EX4650 Switches

The DC power supply in EX4650 is 650 W with dual feeds for power resiliency. Figure 23 on page 50 shows a DC power supply for an EX4650 switch.

Figure 23: DC power supply for an EX4650 switch

NOTE: The DC power supply in the switch has four terminals labeled V-, V-, V+, and V+ for

connecting DC power source cables labeled positive (+) and negative (–) as shown in

Figure 24 on page 51.

Figure 24: DC power supply faceplate of an EX4650 switch

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5—1— Fault LEDAFI

6—2— Ouput LEDInput terminals

7—3— Input LEDEjector lever

4—ESD grounding point

Airflow Direction in Power Supplies

Each power supply has two fan supplies and is cooled by its own internal cooling system.

Figure 25 on page 51

Figure 25: Power supply handle detail

1—AIR IN (AFI) label

Be sure to use the correct power supply for your chassis product SKU (see Table 20 on page 52).

CAUTION: Do not mix:

AC and DC power supplies in the same chassis.

•

Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the

•

same chassis.

Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR

•

OUT (AFO)) in the same chassis.

CAUTION: Verify that the airflow direction on the power supply handle matches the

Table 20 on page 52 lists the DC power supplies used in EX4650 switches and the direction of airflow in

them.

Table 20: Airflow direction in power supplies for EX4650 switches

Color of Power Supply HandleDirection of AirflowProduct Number

Juniper GoldFront to backJPSU-650W-DC-AFO

Juniper Azure BlueBack to frontJPSU-650W-DC-AFI

EX4650 DC Power Specifications

Table 21 on page 53 describes the EX4650 DC power specifications. The typical and maximum power

consumption values are calculated using dummy transceivers on all ports. Traffic is run at 25° C ambient temperature.

Table 21: DC Power Specifications for EX4650

SpecificationsItem

DC input voltage

Rated operating voltage: –48 VDC

•

to -60 VDC

Operating voltage range: -40.8 VDC

•

through -72 VDC

20 A maximumDC input current rating

260 WTypical power consumption

450 WMaximum power consumption

DC Power Supply LEDs in EX4650 Switches

Figure 26 on page 53 shows the location of the LEDs on the DC power supply.

Figure 26: DC Power Supply Faceplate on an EX4650 Switch

3—1— Fault LEDInput LED

2—Output LED

CAUTION: The V+ terminals are shunted internally together, as are the V- terminals.

The same polarity terminal can be wired together from the same source to provide an additional current path in a higher power chassis. Do not connect the terminals to different sources.

Table 22 on page 54 describes the LEDs on the DC power supplies.

Table 22: DC Power Supply LEDs on an EX4650 Switch

DescriptionStateColorLED

OffUnlitIn

OffUnlitOut

On steadilyGreen

On steadilyAmberFault

The power supply is disconnected from power, or power is not coming into the power supply.

Power is coming into the power supply.On steadilyGreen

The power supply is disconnected from power, or the power supply is not sending out power correctly.

The power supply is sending out power correctly.

An error has occurred in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.

CHAPTER

Site Planning, Preparation, and

Specifications

Site Preparation Checklist for EX4650 Switches | 56

EX4650 Site Guidelines and Requirements | 57

EX4650 Network Cable and Transceiver Planning | 64

EX4650 Management Cable Specifications and Pinouts | 70

Site Preparation Checklist for EX4650 Switches

The checklist in Table 23 on page 56 summarizes the tasks you need to perform to prepare a site for installing an EX4650 switch.

Table 23: Site Preparation Checklist

DatePerformed byFor More InformationItem or Task

Environment

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

Power

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

Locate sites to connect system grounding.

Calculate the power consumption and requirements.

Hardware Configuration

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

Rack or Cabinet

Environmental Requirements and

Specifications for EX Series

Switches

“EX4650 Power System” on page 40

“EX4650 Switches Hardware Overview” on page 18

Verify that the rack meets the minimum requirements for installing the switch.

Plan rack or cabinet location, including required space clearances.

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

Cables

Rack Requirements for EX4650

•

Switches on page 60

Table 23: Site Preparation Checklist (continued)

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 the cable based on the distance between the hardware components being connected.

Plan the cable routing and management.

EX4650 Site Guidelines and Requirements

DatePerformed byFor More InformationItem or Task

IN THIS SECTION

Environmental Requirements and Specifications for EX4650 Switches | 57

General Site Guidelines | 59

Site Electrical Wiring Guidelines | 59

Rack Requirements for EX4650 Switches | 60

Cabinet Requirements for EX4650 Switches | 61

Clearance Requirements for Airflow and Hardware Maintenance for EX4650 Switches | 62

Environmental Requirements and Specifications for EX4650 Switches

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

Follow these environmental guidelines:

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

•

efficiency of the switch cooling system.

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

•

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

Table 24 on page 58 provides the required environmental conditions for normal switch operation for all

EX4650 models.

Table 24: EX4650 Environmental Tolerances

ToleranceDescription

No performance degradation to 6562 feet (2000 meters)Altitude

Relative humidity

Temperature

Seismic

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

Short-term operation ensured in relative humidity range of 5% through

•

93%, noncondensing

NOTE: As defined in NEBS GR-63-CORE, Issue 3, short-term events can

be up to 96 hours in duration but not more than 15 days per year.

Normal operation ensured in temperature range of 32° F through 104° F

•

(0° C through 45° C)

Nonoperating storage temperature in shipping container: –40° F through

•

158° F (–40° C through 70° C)

Designed to comply with Zone 4 earthquake requirements per NEBS GR-63-CORE, Issue 3.

NOTE: Install EX4650 devices only in restricted areas, such as dedicated equipment rooms and

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

General Site Guidelines

Efficient device operation requires proper site planning and maintenance and proper layout of the equipment, rack or cabinet, 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 25 on page 59 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.

Avertissement Vous devez établir un environnement protégé et convenablement mis à la terre et utiliser des dispositifs de parasurtension.

Table 25: 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 25: 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

•

Rack Requirements for EX4650 Switches

EX4650 switches are designed to be installed on four-post racks.

Rack requirements consist of:

Rack type

•

Mounting bracket hole spacing

•

Rack size and strength

•

Table 26 on page 60 provides the rack requirements and specifications for the EX4650.

Table 26: Rack Requirements for the EX4650

GuidelinesRack Requirement

Rack type

Use a 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.

Table 26: Rack Requirements for the EX4650 (continued)

GuidelinesRack Requirement

Mounting bracket hole spacing

Rack size and strength

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

Ensure that the rack is a 19-in. rack as defined in Cabinets, Racks, Panels,

•

and Associated Equipment (document number EIA-310–D) published by the Electronics Components Industry Association (http://www.ecianow.org/).

Ensure that the rack is one of the following standard lengths:

•

23.6 in. (600 mm)

•

30.0 in. (762 mm

•

31.5 in. (800 mm)

•

Ensure that the rack rails are spaced widely enough to accommodate the

•

switch chassis’ external dimensions. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm).

Either side of the switch needs to be mounted flush with the rack and still

•

adjustable for racks with different depths. The front and rear rack rails must be spaced between 23.62 in. (600 mm) and 31.5 in. (800 mm) front to back.

Ensure that for four-post installations, the front and rear rack rails are spaced

•

between 23 in. (58.5 cm) to 30.25 in. (76.8 cm) front-to-back.

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

•

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

•

clearance around the switch 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 wall or floor brackets for

•

maximum stability.

Cabinet Requirements for EX4650 Switches

You can mount the EX4650 in a cabinet that contains a four-post 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry

Association.

Cabinet requirements consist of:

Cabinet size and clearance

•

Cabinet airflow requirements

•

Table 27 on page 62 provides the cabinet requirements and specifications for the EX4650 switch.

Table 27: Cabinet Requirements for the EX4650 Switch

GuidelinesCabinet Requirement

Cabinet size and clearance

Cabinet clearance

Cabinet airflow requirements

The minimum cabinet size for accommodating a EX4650 switch is 36 in. (91.4 cm) deep. Large cabinets improve airflow and reduce the chance of overheating.

The outer edges of the front-mounting brackets extend the width of the

•

chassis to 19 in. (48.2 cm)

The minimum total clearance inside the cabinet is 30.7 in. (780 mm)

•

between the inside of the front door and the inside of the rear door.

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

Ensure that the cool air supply you provide through the cabinet adequately

•

dissipates the thermal output of the switch (or switches).

Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet

•

without recirculating into the switch. 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.

The EX4650 fans exhaust hot air either through the vents on the port panel

•

or through the fans and power supplies. Install the switch in the cabinet in a way that maximizes the open space on the FRU side of the chassis. This 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 switch and cabinet.

Clearance Requirements for Airflow and Hardware Maintenance for EX4650 Switches

When planning the site for installing an EX4650 switch, you must ensure sufficient clearance around the switch.

Follow these clearance requirements:

For the cooling system to function properly, the airflow around the chassis must be unrestricted. See

Front Rear

g022084

•

Figure 27 on page 63, Figure 28 on page 63, andFigure 29 on page 64 for reference.

Figure 27: Front-to-Back Airflow

Figure 28: Back-to-Front Airflow

If you are mounting the switch on a rack or cabinet along with other equipment, ensure that the exhaust

•

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

Leave at least 6 in. (15.2 cm) clearance in front of and behind the chassis for airflow.

•

Leave at least 6 in. (15.2 cm) clearance on the left of the chassis for installing the grounding lug.

•

Leave at least 24 in. (61 cm) clearance in front of and behind the switch for service personnel to remove

•

and install hardware components.

Figure 29: Clearance Requirements for Airflow and Hardware Maintenance for an EX4650 Switch

EX4650 Network Cable and Transceiver Planning

IN THIS SECTION

Pluggable Transceivers Supported on EX4650 Switches | 64

SFP28 Direct Attach Copper Cables for EX4650 Switches | 65

QSFP28 Direct Attach Copper Cables for EX4650 Switches | 67

Calculating the Fiber-Optic Cable Power Budget for EX Series Devices | 68

Calculating the Fiber-Optic Cable Power Margin for EX Series Devices | 68

Pluggable Transceivers Supported on EX4650 Switches

EX4650 switches support SFP, SFP+, and QSFP+ transceivers. You can find the list of transceivers supported on EX4650 switches and information about those transceivers at the Hardware Compatibility Tool page

for EX4650.

NOTE: We recommend that you use only optical transceivers and optical connectors purchased

from Juniper Networks with your Juniper Networks device.

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.

The Gigabit Ethernet SFP+, and QSFP+ transceivers installed in EX4650 switches support digital optical monitoring (DOM): You can view the diagnostic details for these transceivers by issuing the operational mode CLI command show interfaces diagnostics optics.

NOTE: The transceivers support DOM even if they are installed in the SFP+ uplink module ports.

SFP28 Direct Attach Copper Cables for EX4650 Switches

IN THIS SECTION

Cable Specifications | 66

Standards Supported by These Cables | 66

Small form-factor pluggable transceiver (SFP28) direct attach copper (DAC) cables, also known as Twinax cables, are suitable for in-rack connections between servers and switches. They are suitable for short distances, making them ideal for highly cost-effective networking connectivity within a rack and between adjacent racks.

NOTE: We recommend that you use only SFP28 DAC cables purchased from Juniper Networks

with your Juniper Networks device.

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

Cable Specifications

EX4650 switches support SFP28 passive DAC cables. The passive Twinax cable is a straight cable with no active electronic components. EX4650 switches support 1 m, 3 m, and 5 m long SFP28 passive DAC cables. See Figure 30 on page 66.

Figure 30: SFP28 Direct Attach Copper Cables for EX4650 Switches

The cables are hot-removable and hot-insertable: You can remove and replace them without powering off the switch or disrupting switch functions. A cable comprises a low-voltage cable assembly that connects directly into two 25-Gigabit Ethernet ports, one at each end of the cable. The cables use high-performance integrated duplex serial data links for bidirectional communication and are designed for data rates of up to 25 Gbps.

Standards Supported by These Cables

The cables comply with the following standards:

SFP mechanical standard SFF-8431— see ftp://ftp.seagate.com/sff/SFF-8431.PDF.

•

Electrical interface standard SFF-8432— see ftp://ftp.seagate.com/sff/SFF-8432.PDF.

•

SFP+ Multi-Source Alliance (MSA) standards

•

QSFP28 Direct Attach Copper Cables for EX4650 Switches

IN THIS SECTION

Cable Specifications | 67

Quad small form-factor pluggable (QSFP28) direct attach copper (DAC) cables are suitable for in-rack connections between QSFP28 ports on EX4650 switches. They are suitable for short distances, making them ideal for highly cost-effective networking connectivity within a rack and between adjacent racks.

NOTE: We recommend that you use only QSFP28 DAC cables purchased from Juniper Networks

with your Juniper Networks device.

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

Cable Specifications

QSFP28 passive DAC cables are hot-removable and hot-insertable. A cable consists of a cable assembly that connects directly into two QSFP28 modules, one at each end of the cable. The cables use integrated duplex serial data links for bidirectional communication and are designed for data rates up to 100 Gbps. Passive DAC cables have no signal amplification built into the cable assembly. See Figure 31 on page 67.

Figure 31: QSFP28 Direct Attach Copper Cables

Calculating the Fiber-Optic Cable Power Budget for EX Series Devices

To ensure that fiber-optic connections have sufficient power for correct operation, calculate the link's power budget when planning fiber-optic cable layout and distances to ensure that fiber-optic connections have sufficient power for correct operation. The power budget is the maximum amount of power the link 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 for fiber-optic cable power budget (PB) for the link:

1. Determine values for the link's minimum transmitter power (PT) and minimum receiver sensitivity (PR). For example, here, (PT) and (PR) are measured in decibels, and decibels are referred to one milliwatt (dBm).

PT= – 15 dBm

PR= – 28 dBm

NOTE: See the specifications for your transmitter and receiver to find the minimum transmitter

power and minimum receiver sensitivity.

2. Calculate the power budget (PB) by subtracting (PR) from (PT):

– 15 dBm – (–28 dBm) = 13 dBm

Calculating the Fiber-Optic Cable Power Margin for EX Series Devices

Calculate the link's power margin when planning fiber-optic cable layout and distances to ensure that fiber-optic connections have sufficient signal power to overcome system losses and still satisfy the minimum input requirements of the receiver for the required performance level. The power margin (PM) is the amount

of power available after attenuation or link loss (LL) has been subtracted from the power budget (PB).

When you calculate the power margin, 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 worst-case levels. A power margin (PM) greater

than zero indicates that the power budget is sufficient to operate the receiver and that it does not exceed the maximum receiver input power. This means the link will work. A (PM) that is zero or negative indicates

insufficient power to operate the receiver. See the specification for your receiver to find the maximum receiver input power.

Before calculating the power margin:

Calculate the power budget (see “Calculating the Fiber-Optic Cable Power Budget for EX Series Devices”

•

on page 68).

To calculate the worst-case estimate for the power margin (PM) for the link:

1. Determine the maximum value for link loss (LL) by adding estimated values for applicable link-loss factors—for example, use the sample values for various factors as provided in Table 28 on page 69 (here, the link is 2 km long and multimode, and the (PB) is 13 dBm):

Table 28: Estimated Values for Factors Causing Link Loss

Sample (LL) Calculation ValuesEstimated Link-Loss ValueLink-Loss Factor

Higher-order mode losses (HOL)

Modal and chromatic dispersion

Fiber attenuation

Multimode—0.5 dBm

•

Single mode—None

•

Multimode—None, if product of

•

bandwidth and distance is less than 500 MHz/km

Single mode—None

•

0.5 dBmConnector

0.5 dBmSplice

Multimode—1 dBm/km

•

Single mode—0.5 dBm/km

•

0.5 dBm

•

0 dBm

•

0 dBm

•

0 dBm

•

This example assumes 5 connectors. Loss for 5 connectors:

(5) * (0.5 dBm) = 2.5 dBm

This example assumes 2 splices. Loss for two splices:

(2) * (0.5 dBm) = 1 dBm

This example assumes the link is 2 km long. Fiber attenuation for 2 km:

(2 km) * (1.0 dBm/km) = 2 dBm

•

(2 km) * (0.5 dBm/km) = 1 dBm

•

NOTE: For information about the actual amount of signal loss caused by equipment and

other factors, see your vendor documentation for that equipment.

2. Calculate the (PM) by subtracting (LL) from (PB):

PB– LL = P

1 dBm1 dBmClock Recovery Module (CRM)

(13 dBm) – (0.5 dBm [HOL]) – ((5) * (0.5 dBm)) – ((2) * (0.5 dBm)) – ((2 km) * (1.0 dBm/km)) – (1 dB [CRM]) = P

13 dBm – 0.5 dBm – 2.5 dBm – 1 dBm – 2 dBm – 1 dBm = P

PM= 6 dBm

The calculated power margin is greater than zero, indicating that the link has sufficient power for transmission. Also, the power margin value does not exceed the maximum receiver input power. Refer to the specification for your receiver to find the maximum receiver input power.

EX4650 Management Cable Specifications and Pinouts

IN THIS SECTION

Console Port Connector Pinout Information | 70

RJ-45 Management Port Connector Pinout Information | 71

RJ-45 to DB-9 Serial Port Adapter Pinout Information | 72

QSFP+, QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information | 72

Console Port Connector Pinout Information

The console port on a Juniper Networks device is an RS-232 serial interface that uses an RJ-45 connector to connect to a console management device. The default baud rate for the console port is 9600 baud.

Table 29 on page 71 provides the pinout information for the RJ-45 console connector.

NOTE: If your laptop or PC does not have a DB-9 plug connector pin and you want to connect

your laptop or PC directly to a device, use a combination of the RJ-45 to DB-9 socket adapter and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter.

Table 29: Console Port Connector Pinout Information

DescriptionSignalPin

No ConnectionNC1

No ConnectionNC2

Transmit dataTxD Output3

Signal groundSignal Ground4

Signal groundSignal Ground5

Receive dataRxD Input6

No ConnectionNC7

No ConnectionNC8

RJ-45 Management Port Connector Pinout Information

Table 30 on page 71 provides the pinout information for the RJ-45 connector for the management port

on Juniper Networks devices.

Table 30: RJ-45 Management Port Connector Pinout Information

DescriptionSignalPin

Transmit/receive data pair 1TRP1+1

Transmit/receive data pair 1TRP1—2

Transmit/receive data pair 2TRP2+3

Transmit/receive data pair 3TRP3+4

Transmit/receive data pair 3TRP3—5

Transmit/receive data pair 2TRP2—6

Transmit/receive data pair 4TRP4+7

Table 30: RJ-45 Management Port Connector Pinout Information (continued)

DescriptionSignalPin

Transmit/receive data pair 4TRP4—8

RJ-45 to DB-9 Serial Port Adapter Pinout Information

The console port is an RS-232 serial interface that uses an RJ-45 connector to connect to a management device such as a laptop or a desktop PC. If your laptop or desktop PC does not have a DB-9 plug connector pin and you want to connect your laptop or desktop PC to the device, use a combination of the RJ-45 to DB-9 socket adapter along with a USB to DB-9 plug adapter.

Table 31 on page 72 provides the pinout information for the RJ-45 to DB-9 serial port adapter.

Table 31: RJ-45 to DB-9 Serial Port Adapter Pinout Information

SignalDB-9 PinSignalRJ-45 Pin

CTS8RTS1

DSR6DTR2

RxD2TxD3

GND5GND4

TxD3RxD6

DTR4DSR7

RTS7CTS8

QSFP+, QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information

Table 32 on page 73—SFP network port connector pinout information

•

Table 33 on page 74—SFP+ network port connector pinout information

•

Table 34 on page 75—QSFP+ and QSFP28 network module ports connector pinout information

•

Table 32: SFP Network Port Connector Pinout Information

DescriptionSignalPin

Module transmitter groundVeeT1

Module transmitter faultTX_Fault2

Transmitter disabledTX_Disable3

2-wire serial interface data lineSDA4

2-wire serial interface clockSCL-5

Module absentMOD_ABS6

Rate selectRS7

Receiver loss of signal indicationRX_LOS8

Module receiver groundVeeR9

Module receiver groundVeeR10

Module receiver groundVeeR11

Receiver inverted data outputRD-12

Receiver noninverted data outputRD+13

Module receiver groundVeeR14

Module receiver 3.3 V supplyVccR15

Module transmitter 3.3 V supplyVccT16

Module transmitter groundVeeT17

Transmitter noninverted data inputTD+18

Transmitter inverted data inputTD-19

Module transmitter groundVeeT20

Table 33: SFP+ and SFP28 Network Port Connector Pinout Information

DescriptionSignalPin

Module transmitter groundVeeT1

Module transmitter faultTX_Fault2

Transmitter disabledTX_Disable3

2-wire serial interface data lineSDA4

2-wire serial interface clockSCL-5

Module absentMOD_ABS6

Rate select 0, optionally controls SFP+ module receiverRS07

Receiver loss of signal indicationRX_LOS8

Rate select 1, optionally controls SFP+ transmitterRS19

Module receiver groundVeeR10

Module receiver groundVeeR11

Receiver inverted data outputRD-12

Receiver noninverted data outputRD+13

Module receiver groundVeeR14

Module receiver 3.3 V supplyVccR15

Module transmitter 3.3 V supplyVccT16

Module transmitter groundVeeT17

Transmitter noninverted data inputTD+18

Transmitter inverted data inputTD-19

Module transmitter groundVeeT20

Table 34: QSFP+ and QSFP28 Network Port Connector Pinout Information

SignalPin

GND1

TX2n2

TX2p3

GND4

TX4n5

TX4p6

GND7

ModSelL8

LPMode_Reset9

VccRx10

SCL11

SDA12

GND13

RX3p14

RX3n15

GND16

RX1p17

RX1n18

GND19

GND20

RX2n21

Table 34: QSFP+ and QSFP28 Network Port Connector Pinout Information (continued)

SignalPin

RX2p22

GND23

RX4n24

RX4p25

GND26

ModPrsL27

IntL28

VccTx29

Vcc130

Reserved31

GND32

TX3p33

TX3n34

GND35

TX1p36

TX1n37

GND38

CHAPTER

Initial Installation and Configuration

Unpacking and Mounting the EX4650 Switch | 78

Connecting the EX4650 to Power | 84

Connecting the EX4650 to the Network | 93

Connecting the EX4650 to External Devices | 97

Configuring Junos OS on the EX4650 | 100

Unpacking and Mounting the EX4650 Switch

IN THIS SECTION

Unpacking the Switch | 78

Parts Inventory (Packing List) for an EX4650 Switch | 79

Mounting an EX4650 Switch on Four Posts of a Rack or Cabinet | 80

Unpacking the Switch

EX4650 switches are shipped in a cardboard carton, secured with foam packing material. The carton has an accessory compartment and contains the quick start instructions.

CAUTION: EX4650 switches are maximally protected inside the shipping carton. Do

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

To unpack the switch:

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 marked on the carton are pointing up.

3. Open the top flaps on the shipping carton.

4. Pull out the packing material holding the switch in place.

5. Verify the parts received against the inventory on the label attached to the carton.

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

Parts Inventory (Packing List) for an EX4650 Switch

The switch shipment includes a packing list. Check the parts you receive with the switch against the items in the packing list. The packing list specifies the part number and provides a description of each part in your order. The parts shipped depend on the switch model you order.

If any part in 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 35 on page 79 lists the parts and their quantities as listed in the standard packing list for an EX4650

switch.

Table 35: Inventory of Components Provided with an EX4650 Switch

Component

appropriate for your geographical location

Mounting brackets

Quantity

1Switch

5 preinstalledEX4650Fan modules

2 (AC or DC) preinstalledEX4650Power supplies

2EX4650AC power cord

Rear mounting blades - 2

•

Front mounting brackets - 2

•

Extension brackets - 2

•

Mounting screws - 12

•

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 the appropriate mounting screws for mounting the switch on a rack.

Register Products—Mandatory to Validate SLAs

Register all new Juniper Networks hardware products and changes to an existing installed product using the Juniper Networks website to activate your hardware replacement service-level agreements (SLAs).

CAUTION: Register product serial numbers on the Juniper Networks website and

update the installation base data if there is any addition or change to the installation base or if the installation base is moved. Juniper Networks will not be held accountable for not meeting the hardware replacement service-level agreement for products that do not have registered serial numbers or accurate installation base data.

https://www.juniper.net/customers/csc/management/updateinstallbase.jsp.

Mounting an EX4650 Switch on Four Posts of a Rack or Cabinet

You can mount an EX4650 switch on four posts of a 19-in. rack or a 19-in. cabinet by using the separately orderable four-post rack-mount kit. (The remainder of this topic uses rack to mean rack or cabinet.)

NOTE:

To ensure that the protective earthing terminal is accessible through the opening in the rear mounting-blade:

Ensure that the rack is 23 in. (58.5 cm) through 30.25 in. (76.8 cm) deep if you are mounting

•

the switch flush with the rack front on four posts of a rack.

Ensure that the rack is 25 in. (63.5 cm) through 32.25 in. (81.9 cm) deep if you are mounting

•

the switch 2 in. recessed from the rack front.

Before mounting the switch on four posts of a rack:

Verify that the site meets the requirements described in “Site Preparation Checklist for EX4650 Switches”

•

on page 56

Place the rack in its permanent location, allowing adequate clearance for airflow and maintenance, and

•

secure it to the building structure.

Read “General Safety Guidelines and Warnings” on page 141, with particular attention to “Chassis and

•

Component Lifting Guidelines” on page 148.

Remove the switch from the shipping carton (see“Unpacking the Switch” on page 78.

•

Ensure that you have the following parts and tools available:

Phillips (+) screwdriver, number 2 (not provided)

•

6 flat-head 4-40 Phillips mounting screws (provided with the four-post rack-mount kit)

•

12 flat-head 4x6-mm Phillips mounting screws (provided with the four-post rack-mount kit)

•

One pair each of flush or 2-in.-recess front-mounting brackets (provided with the four-post rack-mount

•

kit)

One pair of side mounting-rails (provided with the four-post rack-mount kit)

•

One pair of rear mounting-blades (provided with the four-post rack-mount kit)

•

Screws to secure the chassis and the rear mounting-blades to the rack (not provided)

•

NOTE: One person must be available to lift the switch 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.

To mount the switch on four posts of a rack:

g022533

1. Place the switch on a flat, stable surface.

NOTE: The four-post rack-mount kit ships with the short front-mounting brackets attached

to the side mounting-rails. If you want to recess the switch in the rack, you must unscrew the short front-mounting brackets from the side mounting-rails by using the Phillips (+) screwdriver and attach the long front-mounting brackets to the side mounting-rails.

2. Align the side mounting-rails along the side panels of the switch chassis. Align the two holes in the rear of the side mounting-rails with the two holes on the rear of the side panels.

3. Insert 4x6-mm Phillips flat-head mounting screws into the two aligned holes and tighten the screws by using the screwdriver. Ensure that the remaining four holes in the side mounting-rails are aligned with the four holes in the side panel. See Figure 32 on page 82.

Figure 32: Attaching the Side Mounting-Rail to the Switch Chassis

4. Insert the 4x6-mm Phillips flat-head mounting screws into the remaining four holes in the side mounting-rails and tighten the screws by using the screwdriver.

5. Have one person grasp both sides of the switch, lift the switch, and position it in the rack, aligning the side mounting-rail holes with the threaded holes in the front post of the rack. Align the bottom hole in both the front-mounting brackets with a hole in each rack rail, making sure the chassis is level. See

Figure 33 on page 83.

Figure 33: Mounting the Switch on Front Posts of a Rack

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g022535

6. Have a second person secure the front of the switch to the rack by using the appropriate screws for your rack.

7. Slide the rear mounting-blades into the side mounting-rails. See Figure 34 on page 83.

Figure 34: Sliding the Rear Mounting-Blades into the Side Mounting-Rails

8. Attach the rear mounting-blades to the rear post by using the appropriate screws for your rack. Tighten the screws.

9. Ensure that the switch chassis is level by verifying that all the screws on the front of the rack are aligned with the screws at the back of the rack.

NOTE: We recommend that you install cover panels in the unused power supply slots.

Connecting the EX4650 to Power

IN THIS SECTION

Connect the EX4650 Switch to Earth Ground | 84

Connecting AC Power to an EX4650 Switch | 86

Connecting DC Power to an EX4650 Switch | 88

Connect the EX4650 Switch to Earth Ground

To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect the switch to earth ground before you connect power to the switch. You must install the switch in a restricted-access location and ensure that the chassis is properly grounded at all times.

EX4650 switches have one 2-hole protective earthing terminal on the left panel. The preferred method to ground the EX4650 chassis is to use the protective earthing terminal on the switch chassis. Alternatively, you can use any additional grounding method, such as the grounding wire in the AC power cord if it is available. EX4650 switches are tested to meet or exceed all applicable EMC regulatory requirements with the 2-hole protective grounding terminal connected correctly as described in this topic.

CAUTION: Ensure that a licensed electrician has attached the appropriate grounding

lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.

NOTE: The protective earthing terminal on EX4650 switches mounted flush with the front posts

of a rack is accessible through the slot on the left rear bracket only if the distance between the front posts and the rear posts is 23 in. (58.5 cm) through 30.25 in. (76.8 cm). The protective earthing terminal on EX4650 switches mounted in a recessed position from the front posts of a rack is accessible through the slot on the left rear bracket only if the distance between the front posts and the rear posts is 25 in. (63.5 cm) through 32.25 in. (81.9 cm). AC-powered switches gain additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using the AC power cord appropriate for your geographical location. For DC-powered EX4650 switches, if you are unable to access the protective earthing terminal, you can connect the grounding cable to the earth ground terminal on the DC power supply.

Before you connect earth ground to a EX4650 switch, ensure that you have the following parts and tools available:

Grounding cable:

•

14 AWG (1.5 mm²), minimum 90° C wire, or as permitted by the local code—not provided

•

Grounding lug:

•

Panduit LCD10-10A-L or equivalent—not provided

•

Screws to secure the grounding lug:

•

Two 10-32 x .25-in. screws with #10 split-lock washers—not provided

•

Number 2 Phillips (+) screwdriver—not provided

•

ESD grounding strap—not provided

•

To ground the EX4650:

1. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.

2. Place the grounding lug attached to the grounding cable over the protective earthing terminal. The protective earthing terminal is located on the left panel (see Figure 35 on page 86).

Figure 35: Connect a Grounding Cable to the EX4650

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3. Secure the grounding lug to the protective earthing terminal with the screws.

4. Dress the grounding cable and ensure that it does not touch or block access to other switch components.

WARNING: Ensure that the cable does not drape where people could trip over it.

Connecting AC Power to an EX4650 Switch

The EX4650 is shipped with two 650 W power supplies pre-installed. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting switch functions.

Ensure that you have a power cord appropriate for your geographical location available to connect AC power to the switch.

Before you begin connecting AC power to the switch:

Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage

•

(see “Prevention of Electrostatic Discharge Damage” on page 175).

Ensure that you have connected the switch chassis to earth ground.

•

CAUTION: Before you connect power to the switch, 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 switch (for example, by causing a short circuit).

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the switch chassis to connect to the earth ground. For instructions on connecting earth ground, see Connecting Earth Ground to an EX4650. The switch gains additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using the AC power cord appropriate for your geographical location.

To connect AC power to an EX4650:

1. Attach the grounding strap to your bare wrist and to a site ESD point.

2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure. If only one power supply is installed, ensure that a blank cover panel is installed over the second power supply slot.

3. Locate the power cord or cords shipped with the switch; the cords have plugs appropriate for your geographical location.

WARNING: Ensure that the power cord does not block access to device components

or drape where people can trip on it.

4. Connect each power supply to the power sources. Insert the coupler end of the power cord into the AC power cord inlet on the AC power supply faceplate.

5. Push the power cord retainer onto the power cord (see Figure 36 on page 88).

Figure 36: Connecting an AC Power Cord to an AC Power Supply in an EX4650

g022513

1—Power cord retainer

6. The switch powers on as soon as power is provided to the power supply. There is no power switch on the device.

7. Insert the power cord plug into an AC power source outlet.

8. Verify that the AC and DC LEDs on each power supply are lit green.

If the amber fault LED is lit, remove power from the power supply, and replace the power supply. Do not remove the power supply until you have a replacement power supply ready: the power supplies or a blank cover panel must be installed in the switch to ensure proper airflow.

CAUTION: Replace a failed power supply with a blank panel or new power supply

within one minute of removal to prevent chassis overheating.

Connecting DC Power to an EX4650 Switch

The EX4650 is shipped from the factory with two 650 W power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.

WARNING: A DC-powered EX4650 is intended for installation only in a restricted

access location.

NOTE: The battery returns of the DC power supply must be connected as an isolated DC return

(DC-I).

Before you begin connecting DC power to the switch:

Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage

•

(see “Prevention of Electrostatic Discharge Damage” on page 175).

Ensure that you have connected the switch chassis to earth ground.

•

CAUTION: Before you connect power to the switch, 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 switch (for example, by causing a short circuit).

Install the power supply in the chassis.

•

Ensure that you have the following parts and tools available. Also, the grounding cable must be 14 AWG (2 mm²), minimum 90° C wire, or as permitted by the local code.

Grounding lug for your grounding cable—The grounding lug required is a Panduit LCD10-10A-L or

•

equivalent.

• Two M4 HEX nuts with integrated washers—Two nuts and washers are used to secure the grounding

•

lug to the grounding lug bracket protective earthing terminal. Four nuts are provided in the accessory kit.

• 7-mm wrench or a socket with driver to attach the two nuts.

•

To connect DC power to a EX4650:

1. Attach the grounding strap to your bare wrist and to a site ESD point.

2. 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 RTN DC cables to chassis ground:

The cable with very low resistance (indicating a closed circuit) to chassis ground is positive (+) and

•

will be installed on the V+ (return) DC power input terminal.

The cable with very high resistance (indicating an open circuit) to chassis ground is negative (–) and

•

will be installed on the V– (input) DC power input terminal.

CAUTION: You must ensure that power connections maintain the proper polarity.

The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the DC power input terminals on each power supply.

3. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable leads is 0 V and that the cable leads do not become active while you are connecting DC power.

NOTE: The V+ terminals are referred to as +RTN, and V– terminals are referred to as –48 V

in “DC Power Wiring Sequence Warning” on page 184 and “DC Power Electrical Safety

Guidelines” on page 179.

4. Ensure that the power supplies are fully inserted in the chassis.

5. Remove the terminal block cover. The terminal block cover is a piece of clear plastic that snaps into place over the terminal block (see Figure 37 on page 92).

6. Remove the screws on the terminals using the screwdriver. Save the screws.

WARNING: Ensure that the power cables do not block access to device components

or drape where people can trip on them.

7. Connect each power supply to the power sources. Secure power source cables to the power supplies by screwing the ring lugs attached to the cables to the appropriate terminals by using the screw from the terminals (seeFigure 37 on page 92 and Figure 38 on page 93).

The EX4650 is designed to operate with a DC power supply that has a single, non-redundant, feed input. For source redundancy, two DC power supplies must be installed in the EX4650; connect source (A) to one power supply and connect source (B) to the second power supply. This configuration provides the commonly deployed A/B feed redundancy for the system.

The terminal block of the power supply has four terminals labeled V+, V+, V–, and V– for connecting DC power source cables labeled positive (+) and negative (–). The V+ terminals are shunted internally together, as are the V- terminals.

CAUTION: The connection between each power source and power supply must

include a circuit breaker.

Do not connect two sources to a single power supply because doing so can potentially cause circulating current in feed wires whenever there is any difference in the voltage of the two sources.

a. Secure the ring lug of the positive (+) DC power source cable to the V+ terminal on the DC power

supply.

b. Secure the ring lug of the negative (–) DC power source cable to the V– terminal on the DC power

supply.

c. Tighten the screws on the power supply terminals until snug using the screwdriver. Do not

overtighten; apply between 5 in-lb (0.56 Nm) and 6 in-lb (0.68 Nm) of torque to the screws.

Figure 37: DC Power Supply Faceplate for an EX4650

5—1— ESD grounding pointShunt negative input terminals (+RTN)

6—2— Fault LEDShunt positive input terminals (-48V)

7—3— Output LEDTerminal block

8—4— Input LEDEjector lever

CAUTION: The V+ terminals are shunted internally together, as are the V- terminals.

The same polarity terminal can be wired together from the same source to provide an additional current path in a higher power chassis. Do not connect the terminals to different sources.

Figure 38: Securing Ring Lugs to the Terminals on the EX4650 DC Power Supply

8. Replace the terminal block cover.

9. Close the input circuit breaker.

NOTE: The switch powers on as soon as power is provided to the power supply. There is no

power switch on the device.

10. Verify that the IN and OUT LEDs on the power supply are lit green and are on steadily.

Connecting the EX4650 to the Network

IN THIS SECTION

Install a Transceiver | 93

Connect a Fiber-Optic Cable | 96

Install a Transceiver

The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting the device functions.

NOTE: After you insert a transceiver or after you change the media-type configuration, wait for

6 seconds for the interface to display operational commands.

NOTE: We recommend that you use only optical transceivers and optical connectors purchased

from Juniper Networks with your Juniper Networks device.

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

Before you install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see “Laser and LED Safety Guidelines and Warnings” on page 161).

Ensure that you have a rubber safety cap available to cover the transceiver.

Figure 39 on page 96 shows how to install a QSFP+ transceiver. The procedure is the same for all types

of transceivers except the QSFP28 and CFP transceivers.

To install a transceiver:

CAUTION: To prevent electrostatic discharge (ESD) damage to the transceiver, do

not touch the connector pins at the end of the transceiver.

1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to a site ESD point.

2. Remove the transceiver from its bag.

3. Check to see whether the transceiver is covered with a rubber safety cap. If it is not, cover the transceiver with a rubber safety cap.

WARNING: Do not leave a fiber-optic transceiver uncovered except when inserting

or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light.

4. If the port in which you want to install the transceiver is covered with a dust cover, remove the dust cover and save it in case you need to cover the port later. If you are hot-swapping a transceiver, wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver.

CAUTION: Before you slide the transceiver into the port, ensure that the transceiver

is aligned correctly. Misalignment might cause the pins to bend, making the transceiver unusable.

5. Using both hands, carefully insert the transceiver in the empty port. The connectors must face the chassis. Slide the transceiver in gently until it is fully seated. If you are installing a CFP transceiver, tighten the captive screws on the transceiver by using your fingers.

6. Remove the rubber safety cap from the transceiver and the end of the cable, and insert the cable into the transceiver.

WARNING: Do not look directly into a fiber-optic transceiver or into the ends of

fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting

or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

7. If there is a cable management system, arrange the cable in the cable management system to prevent the cable from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.

CAUTION: Do not let fiber-optic cable hang free from the connector. Do not allow

fastened loops of cable to dangle, which stresses the cable at the fastening point.

CAUTION: Avoid bending fiber-optic cable beyond its minimum bend radius. An

arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

Figure 39: Install a Transceiver

1—Ejector lever

Connect a Fiber-Optic Cable

Before you connect a fiber-optic cable to an optical transceiver installed in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see “Laser and LED Safety Guidelines and

Warnings” on page 161).

To connect a fiber-optic cable to an optical transceiver installed in a device:

WARNING: Do not look directly into a fiber-optic transceiver or into the ends of

fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.

1. If the fiber-optic cable connector is covered with a rubber safety cap, remove the cap. Save the cap.

2. Remove the rubber safety cap from the optical transceiver. Save the cap.

3. Insert the cable connector into the optical transceiver (see Figure 40 on page 97).

g000704

TransceiverFiber-optic

cable

Figure 40: Connect a Fiber-Optic Cable to an Optical Transceiver Installed in a Device

4. Secure the cables so that they do not support their own weight. Place excess cable out of the way in a neatly coiled loop. Placing fasteners on a loop helps cables maintain their shape.

CAUTION: Do not bend fiber-optic cables beyond their minimum bend radius. An

arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose.

Do not let fiber-optic cables hang free from the connector. Do not allow fastened loops of cables to dangle, which stresses the cables at the fastening point.

Connecting the EX4650 to External Devices

IN THIS SECTION

Connect a Device to a Network for Out-of-Band Management | 97

Connect a Device to a Management Console Using an RJ-45 Connector | 98

Connect a Device to a Network for Out-of-Band Management

You can monitor and manage the device by using a dedicated management channel. Each device has a management port to which you can connect an Ethernet cable with an RJ-45 connector. Use the management port to connect the device to the management device.

Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. Figure 41 on page 98

g020548

Management PC

Management

Network

To Management Port

(on Device)

shows the RJ-45 connector of the Ethernet cable supplied with the device.

Figure 41: RJ-45 Connector on an Ethernet Cable

To connect a device to a network for out-of-band management (see Figure 42 on page 98):

1. Connect one end of the Ethernet cable to the management port on the device.

2. Connect the other end of the Ethernet cable to the management device.

Figure 42: Connect a Device to a Network for Out-of-Band Management

Connect a Device to a Management Console Using an RJ-45 Connector

You can configure and manage the device by using a dedicated management channel. Each device has a console port which you can connect to using an Ethernet cable with an RJ-45 connector. Use the console port to connect the device to the console server or management console. The console port accepts a cable that has an RJ-45 connector.

Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. One such cable and an RJ-45 to DB-9 serial port adapter are supplied with the device.

Figure 43 on page 99 shows the RJ-45 connector of the Ethernet cable.

Figure 43: RJ-45 Connector on an Ethernet Cable

g020547

To Console Port Console Server

g020570

To Console port

NOTE: If your laptop or desktop PC does not have a DB-9 plug connector pin and you want to

connect your laptop or desktop PC directly to the device, use a combination of the RJ-45 to DB-9 socket adapter supplied with the device and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter.

To connect the device to a management console (see Figure 44 on page 99 and Figure 45 on page 99):

1. Connect one end of the Ethernet cable to the console port (labeled CON, CONSOLE, or CON1) on the device.

2. Connect the other end of the Ethernet cable to the console server (see Figure 44 on page 99) or management console (see Figure 45 on page 99).

Figure 44: Connect a Device to a Management Console Through a Console Server

Figure 45: Connect a Device Directly to a Management Console

Configuring Junos OS on the EX4650

IN THIS SECTION

EX4650 Switch Default Configuration | 100

Connecting and Configuring an EX4650 Switch | 101

EX4650 Switch Default Configuration

Each EX4650 switch is programmed with a factory default configuration that contains the values set for each configuration parameter when a switch is shipped. The default configuration file sets values for system parameters such as the system log and file messages.

100

When you commit changes to the configuration, a new configuration file is created that becomes the active configuration. You can always revert to the factory default configuration. See Reverting to the Factory-Default Configuration for the EX Series Switch.

A factory default configuration file of an EX4650 switch looks like this:

system {

syslog {

user * {

any emergency; } file messages {

any notice;

authorization info; } file interactive-commands {

interactive-commands any; }

} commit {

factory-settings;

}

Juniper EX4650 User Manual

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

EX4650 Switches System Overview

EX4650 Switches Hardware Overview

Benefits of the EX4650 Switch

Software

EX4650 Switch First View

Virtual Chassis

Power Supplies

Cooling System

EX4650 Switch Models

Identifying EX4650 Switch Models

Chassis Physical Specifications for EX4650 Switches

Field-Replaceable Units in EX4650 Switches

EX4650 Chassis

Chassis Status LEDs on EX4650 Switches

Management Port LEDs on EX4650 Switches

Access Port and Uplink Port LEDs on EX4650 Switches

EX4650 Cooling System

Fan Modules

Airflow Direction in EX4650 Switch Models

Front-to-Back Airflow

Back-to-Front Airflow

Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch

Positioning the Switch

Fan Module Status

EX4650 Power System

AC Power Supply in EX4650 Switches

AC Power Supply in EX4650 Switches

DC Power Supply in EX4650 Switches

Airflow Direction in Power Supplies

AC Power Supply Specifications for EX4650 Switches

AC Power Cord Specifications for EX4650 Switches

AC Power Supply LEDs in EX4650 Switches

DC Power Supply in EX4650 Switches

Characteristics of a DC Power Supply

DC Power Supply Airflow

DC Power Supply in EX4650 Switches

DC Power Supply in EX4650 Switches

Airflow Direction in Power Supplies

EX4650 DC Power Specifications

DC Power Supply LEDs in EX4650 Switches

Site Preparation Checklist for EX4650 Switches

EX4650 Site Guidelines and Requirements

Environmental Requirements and Specifications for EX4650 Switches

General Site Guidelines

Site Electrical Wiring Guidelines

Rack Requirements for EX4650 Switches

Cabinet Requirements for EX4650 Switches

Clearance Requirements for Airflow and Hardware Maintenance for EX4650 Switches

EX4650 Network Cable and Transceiver Planning

Pluggable Transceivers Supported on EX4650 Switches

SFP28 Direct Attach Copper Cables for EX4650 Switches

Cable Specifications

Standards Supported by These Cables

QSFP28 Direct Attach Copper Cables for EX4650 Switches

Cable Specifications

Calculating the Fiber-Optic Cable Power Budget for EX Series Devices

Calculating the Fiber-Optic Cable Power Margin for EX Series Devices

EX4650 Management Cable Specifications and Pinouts

Console Port Connector Pinout Information

RJ-45 Management Port Connector Pinout Information

RJ-45 to DB-9 Serial Port Adapter Pinout Information

QSFP+, QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information

Initial Installation and Configuration

Unpacking and Mounting the EX4650 Switch