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.
The information in this document is current as of the date on the title page.
ii
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.
Table of Contents
1
About the Documentation | ix
Documentation and Release Notes | ix
Using the Examples in This Manual | ix
Merging a Full Example | x
Merging a Snippet | xi
Documentation Conventions | xi
Documentation Feedback | xiv
Requesting Technical Support | xiv
Self-Help Online Tools and Resources | xv
Creating a Service Request with JTAC | xv
iii
Overview
EX4650 Switches System Overview | 19
EX4650 Switches Hardware Overview | 19
Benefits of the EX4650 Switch | 20
Software | 20
EX4650 Switch First View | 20
Power Supplies | 23
Cooling System | 24
EX4650 Switch Models | 25
Identifying EX4650 Switch Models | 26
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
2
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
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
iv
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
DC Power Supply in EX4650 Switches | 50
Airflow Direction in Power Supplies | 51
EX4650 DC Power Specifications | 53
DC Power Supply LEDs in EX4650 Switches | 53
Site Planning, Preparation, and Specifications
Site Preparation Checklist for EX4650 Switches | 57
EX4650 Site Guidelines and Requirements | 58
Environmental Requirements and Specifications for EX4650 Switches | 58
General Site Guidelines | 60
Site Electrical Wiring Guidelines | 60
Rack Requirements for EX4650 Switches | 61
Cabinet Requirements for EX4650 Switches | 62
Clearance Requirements for Airflow and Hardware Maintenance for EX4650 Switches | 63
3
EX4650 Network Cable and Transceiver Planning | 65
Pluggable Transceivers Supported on EX4650 Switches | 65
SFP28 Direct Attach Copper Cables for EX4650 Switches | 66
Cable Specifications | 67
Standards Supported by These Cables | 67
QSFP28 Direct Attach Copper Cables for EX4650 Switches | 68
Cable Specifications | 68
Calculating the Fiber-Optic Cable Power Budget for EX Series Devices | 69
Calculating the Fiber-Optic Cable Power Margin for EX Series Devices | 69
EX4650 Management Cable Specifications and Pinouts | 71
Console Port Connector Pinout Information | 71
RJ-45 Management Port Connector Pinout Information | 72
v
RJ-45 to DB-9 Serial Port Adapter Pinout Information | 73
QSFP+, QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information | 73
Initial Installation and Configuration
Unpacking and Mounting the EX4650 Switch | 81
Unpacking the Switch | 81
Parts Inventory (Packing List) for an EX4650 Switch | 82
Registering Products—Mandatory for Validating SLAs | 83
Mounting an EX4650 Switch on Four Posts of a Rack or Cabinet | 83
Connecting the EX4650 to Power | 87
Connecting Earth Ground to an EX4650 Switch | 87
Connecting AC Power to an EX4650 Switch | 88
Connecting DC Power to an EX4650 Switch | 90
Connecting the EX4650 to the Network | 94
Installing a Transceiver | 94
Connecting a Fiber-Optic Cable | 97
Connecting the EX4650 to External Devices | 98
Connecting a Device to a Network for Out-of-Band Management | 98
Connecting a Device to a Management Console by Using an RJ-45 Connector | 99
Configuring Junos OS on the EX4650 | 100
4
5
6
EX4650 Switch Default Configuration | 101
Connecting and Configuring an EX4650 Switch | 101
Maintaining Components
Maintaining the EX4650 Cooling System | 109
Removing a Fan Module from an EX4650 Switch | 109
Installing a Fan Module in an EX4650 Switch | 110
Maintaining the EX4650 Power System | 112
Removing a Power Supply from an EX4650 Switch | 112
Installing an AC Power Supply in an EX4650 Switch | 114
Maintaining Transceivers | 115
Removing a Transceiver | 116
vi
Removing a QSFP28 Transceiver | 119
Installing a Transceiver | 121
Installing a QSFP28 Transceiver | 123
Maintaining Fiber-Optic Cables | 125
Connecting a Fiber-Optic Cable | 125
Disconnecting a Fiber-Optic Cable | 126
Maintaining Fiber-Optic Cables | 127
Troubleshooting Hardware
Troubleshooting the EX4650 Components | 131
Understanding Alarms | 131
Interface Alarm Messages | 132
Creating an Emergency Boot Device | 133
Contacting Customer Support and Returning the Chassis or Components
Returning an EX4650 Chassis or Components | 137
Returning an EX4650 Switch or Component for Repair or Replacement | 137
Locating the Serial Number on an EX4650 Switch or Component | 138
Listing the Switch and Components Details using the CLI | 138
Locating the Chassis Serial Number ID Label on an EX4650 Switch | 139
Locating the Serial Number ID Labels on FRUs in an EX4650 Switch | 139
7
Contacting Customer Support to Obtain Return Material Authorization | 140
Packing an EX4650 Switch or Component for Shipping | 141
Packing an EX4650 Switch for Shipping | 141
Packing EX4650 Switch Components for Shipping | 143
Safety and Compliance Information
General Safety Guidelines and Warnings | 147
Definitions of Safety Warning Levels | 148
Qualified Personnel Warning | 150
Warning Statement for Norway and Sweden | 151
Fire Safety Requirements | 151
Fire Suppression | 151
vii
Fire Suppression Equipment | 151
Installation Instructions Warning | 153
Chassis and Component Lifting Guidelines | 153
Restricted Access Warning | 155
Ramp Warning | 157
Rack-Mounting and Cabinet-Mounting Warnings | 157
Grounded Equipment Warning | 162
Radiation from Open Port Apertures Warning | 163
Laser and LED Safety Guidelines and Warnings | 164
General Laser Safety Guidelines | 164
Class 1 Laser Product Warning | 165
Class 1 LED Product Warning | 166
Laser Beam Warning | 167
Maintenance and Operational Safety Guidelines and Warnings | 167
Battery Handling Warning | 169
Jewelry Removal Warning | 170
Lightning Activity Warning | 172
Operating Temperature Warning | 173
Product Disposal Warning | 175
General Electrical Safety Guidelines and Warnings | 176
Action to Take After an Electrical Accident | 177
Prevention of Electrostatic Discharge Damage | 177
AC Power Electrical Safety Guidelines | 179
AC Power Disconnection Warning | 180
DC Power Electrical Safety Guidelines | 181
DC Power Disconnection Warning | 182
DC Power Grounding Requirements and Warning | 184
viii
DC Power Wiring Sequence Warning | 186
DC Power Wiring Terminations Warning | 189
Multiple Power Supplies Disconnection Warning | 192
TN Power Warning | 193
Agency Approvals for EX4650 Switches | 193
Compliance Statements for EMC Requirements for EX Series Switches | 195
Canada | 195
Taiwan | 196
European Community | 196
Israel | 196
Japan | 197
Korea | 197
United States | 197
FCC Part 15 Statement | 198
Nonregulatory Environmental Standards | 198
About the Documentation
IN THIS SECTION
Documentation and Release Notes | ix
Using the Examples in This Manual | ix
Documentation Conventions | xi
Documentation Feedback | xiv
Requesting Technical Support | xiv
Use this guide to install hardware and perform initial software configuration, routine maintenance, and
troubleshooting for the 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.
ix
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;
}
}
}
}
x
2. Merge the contents of the file into your routing platform configuration by issuing the load merge
configuration mode command:
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]
xi
3. Merge the contents of the file into your routing platform configuration by issuing the load merge
relative configuration mode command:
[edit system scripts]
user@host# load merge relative /var/tmp/ex-script-snippet.conf
load complete
For more information about the load command, see CLI Explorer.
Documentation Conventions
Table 1 on page xii defines notice icons used in this guide.
Table 1: Notice Icons
xii
DescriptionMeaningIcon
Indicates important features or instructions.Informational note
Caution
Indicates a situation that might result in loss of data or hardware
damage.
Alerts you to the risk of personal injury or death.Warning
Alerts you to the risk of personal injury from a laser.Laser warning
Indicates helpful information.Tip
Alerts you to a recommended use or implementation.Best practice
Table 2 on page xii defines the text and syntax conventions used in this guide.
Table 2: Text and Syntax Conventions
ExamplesDescriptionConvention
Fixed-width text like this
Italic text like this
Represents text that you type.Bold text like this
Represents output that appears on
the terminal screen.
Introduces or emphasizes important
•
new terms.
Identifies guide names.
•
Identifies RFC and Internet draft
•
titles.
To enter configuration mode, type
the configure command:
user@host> configure
user@host> show chassis alarms
No alarms currently active
A policy term is a named structure
•
that defines match conditions and
actions.
Junos OS CLI User Guide
•
RFC 1997, BGP Communities
•
Attribute
Table 2: Text and Syntax Conventions (continued)
xiii
ExamplesDescriptionConvention
Italic text like this
Text like this
< > (angle brackets)
| (pipe symbol)
Represents variables (options for
which you substitute a value) in
commands or configuration
statements.
Represents names of configuration
statements, commands, files, and
directories; configuration hierarchy
levels; or labels on routing platform
components.
variables.
Indicates a choice between the
mutually exclusive keywords or
variables on either side of the symbol.
The set of choices is often enclosed
in parentheses for clarity.
Configure the machine’s domain
name:
[edit]
root@# set system domain-name
domain-name
To configure a stub area, include
•
the stub statement at the [edit
protocols ospf area area-id]
hierarchy level.
The console port is labeled
•
CONSOLE.
stub <default-metric metric>;Encloses optional keywords or
broadcast | multicast
(string1 | string2 | string3)
# (pound sign)
[ ] (square brackets)
Indention and braces ( { } )
; (semicolon)
GUI Conventions
Indicates a comment specified on the
same line as the configuration
statement to which it applies.
Encloses a variable for which you can
substitute one or more values.
Identifies a level in the configuration
hierarchy.
Identifies a leaf statement at a
configuration hierarchy level.
rsvp { # Required for dynamic MPLS
only
community name members [
community-ids ]
[edit]
routing-options {
static {
route default {
nexthop address;
retain;
}
}
}
Table 2: Text and Syntax Conventions (continued)
xiv
ExamplesDescriptionConvention
Bold text like this
> (bold right angle bracket)
Represents graphical user interface
(GUI) items you click or select.
Separates levels in a hierarchy of
menu selections.
In the Logical Interfaces box, select
•
All Interfaces.
To cancel the configuration, click
•
Cancel.
In the configuration editor hierarchy,
select Protocols>Ospf.
Documentation Feedback
We encourage you to provide feedback so that we can improve our documentation. You can use either
of the following methods:
Online feedback system—Click TechLibrary Feedback, on the lower right of any page on the Juniper
•
Networks TechLibrary site, and do one of the following:
Click the thumbs-up icon if the information on the page was helpful to you.
•
Click the thumbs-down icon if the information on the page was not helpful to you or if you have
•
suggestions for improvement, and use the pop-up form to provide feedback.
E-mail—Send your comments to techpubs-comments@juniper.net. Include the document or topic name,
•
URL or page number, and software version (if applicable).
Requesting Technical Support
Technical product support is available through the Juniper Networks Technical Assistance Center (JTAC).
If you are a customer with an active Juniper Care or Partner Support Services support contract, or are
covered under warranty, and need post-sales technical support, you can access our tools and resources
online or open a case with JTAC.
JTAC policies—For a complete understanding of our JTAC procedures and policies, review the JTAC User
•
Guide located at https://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf.
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:
Chassis Physical Specifications for EX4650 Switches | 28
Field-Replaceable Units in EX4650 Switches | 28
EX4650 Switches Hardware Overview
19
IN THIS SECTION
Benefits of the EX4650 Switch | 20
Software | 20
EX4650 Switch First View | 20
Power Supplies | 23
Cooling System | 24
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.
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.
20
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
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:
g022501
g022505
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.
Figure 1 on page 21 and Figure 2 on page 21 show the front panel of an EX4650 switch.
Figure 1: Front Panel of an EX4650 Switch
21
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
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 22 shows the rear view of an EX4650 Switch with DC power supplies.
Figure 4: Rear Panel of a DC-Powered EX4650 Switch
g022506
IN
IN
134
56
2
1211108977
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
22
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 23 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
23
12—6—CLEI labelPower supplies
Table 3 on page 23 lists the EX4650 switch models and their components.
Table 3: Components in EX4650 Switches
Fan Modules Shipped by
DefaultBuilt-in PortsSwitch Model
EX4650-48Y-AFO
EX4650-48Y-AFI
EX4650-48Y-DC-AFO
EX4650-48Y-DC-AFI
48x25G SFP28 ports and
8x100G QSFP28 ports
48x25G SFP28 ports and
8x100G QSFP28 ports
48x25G SFP28 ports and
8x100G QSFP28 ports
48x25G SFP28 ports and
8x100G QSFP28 ports
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
Power Supply Shipped by
Default
Two 650 W AC power
supplies (1+1 redundancy)
Two 650 W AC power
supplies (1+1 redundancy)
Two 650 W DC power
supplies (1+1 redundancy)
Two 650 W DC power
supplies (1+1 redundancy)
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
24
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
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
g022520
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:
25
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 25 lists the components shipped with EX4650 switch models.
Table 4: EX4650 Switch Models and Shipped Components
AirflowPower SupplyPortsSwitch Model
EX4650-48Y-AFO
AC48 SFP28
8 QSFP28
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.
Table 4: EX4650 Switch Models and Shipped Components (continued)
26
AirflowPower SupplyPortsSwitch Model
EX4650-48Y-AFI
EX4650-48Y-DC-AFO
EX4650-48Y-DC-AFI
8 QSFP28
8 QSFP28
8 QSFP28
AC48 SFP28
DC48 SFP28
DC48 SFP28
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.
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.
The model number of your switch is one of the following:
27
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
28
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
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Fan modules
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Transceivers
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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 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
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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).
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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)
30
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 systemconfiguration rescue save.
The switch is powered off or halted.UnlitSYS (System)
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Junos OS for EFX Series is loaded on the switch.Green(On steadily)
Indicates a standalone EX4650 switch.Green(On steadily)MST (Master)
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.
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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.
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On steadily—The port and the link are active, but there is no link activity.
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Off—The port is not active.
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Indicates the speed.
Off—Either the port speed is 10 M or the link is down.
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Amber—Link speed is 100 Mbps.
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Green—Link speed is 1000 Mbps.
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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.
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