Juniper EX9253 Installation instructions

EX9253 Switch Hardware Guide
Published
2022-07-01

Juniper Networks, Inc.
1133 Innovaon 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 respecve 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 publicaon without noce.
EX9253 Switch Hardware Guide
Copyright © 2022 Juniper Networks, Inc. All rights reserved.
The informaon in this document is current as of the date on the tle page.
YEAR 2000 NOTICE
Juniper Networks hardware and soware products are Year 2000 compliant. Junos OS has no known me-related
limitaons through the year 2038. However, the NTP applicaon is known to have some diculty in the year 2036.
END USER LICENSE AGREEMENT
The Juniper Networks product that is the subject of this technical documentaon consists of (or is intended for use
with) Juniper Networks soware. Use of such soware is subject to the terms and condions of the End User License
Agreement ("EULA") posted at hps://support.juniper.net/support/eula/. By downloading, installing or using such
soware, you agree to the terms and condions of that EULA.
ii

Table of Contents
About This Guide | ix
1
Overview
EX9253 System Overview | 2
EX9253 Switch Hardware Overview | 2
EX9253 Switch Conguraons | 7
EX9253 Switch Hardware and CLI Terminology Mapping | 10
EX9253 Chassis | 12
Chassis Physical Specicaons of an EX9253 Switch | 12
Field-Replaceable Units in an EX9253 Switch | 13
Host Subsystem in an EX9253 Switch | 15
Understanding EX9253 Switch Component and Funconality Redundancy | 20
EX9253 Cooling System | 21
EX9253 Power System | 27
EX9253 Line Cards | 34
EX9253-6Q12C Line Card | 35
EX9253-6Q12C-M Line Card | 41
2
Site Planning, Preparaon, and Specicaons
Site Preparaon Checklist for an EX9253 Switch | 48
EX9253 Site Guidelines and Requirements | 50
Environmental Requirements and Specicaons for an EX9253 Switch | 50
General Site Guidelines | 51
Site Electrical Wiring Guidelines | 52
Clearance Requirements for Airow and Hardware Maintenance for an EX9253 Switch | 53
Rack and Cabinet Requirements for EX9253 Switches | 54
iii

EX9253 Network Cable and Transceiver Planning | 57
Pluggable Transceivers Supported on an EX9253 Switch | 57
SFP+ Direct Aach Copper Cables for EX Series Switches | 58
QSFP+ Direct Aach Copper Cables for EX Series Switches | 61
Understanding EX Series Switches Fiber-Opc Cable Signal Loss, Aenuaon, and Dispersion | 62
Calculang the Fiber-Opc Cable Power Budget for EX Series Devices | 64
Calculang the Fiber-Opc Cable Power Margin for EX Series Devices | 65
EX9253 Management Cable Specicaons and Pinouts | 67
Management Cable Specicaons | 67
Console Port Connector Pinout Informaon | 68
USB Port Specicaons for an EX Series Switch | 69
RJ-45 to DB-9 Serial Port Adapter Pinout Informaon | 69
RJ-45 Management Port Connector Pinout Informaon | 70
3
Inial Installaon and Conguraon
Unpacking and Mounng the EX9253 Switch | 73
Unpacking an EX9253 Switch | 73
Parts Inventory (Packing List) for an EX9253 Switch | 74
Unpacking a Line Card Used in an EX9253 Switch | 76
Register Products—Mandatory to Validate SLAs | 77
Installing and Connecng an EX9253 Switch | 77
Mounng an EX9253 Switch on a Rack or Cabinet | 78
Connecng the EX9253 to Power | 82
Connecng Earth Ground to an EX9253 Switch | 82
Connecng AC Power to an EX9253 Switch and Powering on the Switch | 85
Connecng DC Power to an EX9253 Switch and Powering on the Switch | 87
Connecng the EX9253 to External Devices | 91
Connect a Device to a Network for Out-of-Band Management | 91
iv

Connect a Device to a Management Console Using an RJ-45 Connector | 92
Connecng the EX9253 Switch to External Clocking and Timing Devices | 94
Connecng 1-PPS and 10-MHz Timing Devices to the Switch | 94
Connecng a BITS External Clocking Device to the Switch | 95
Conguring Clock Synchronizaon Interface on EX9251 and EX9253 Switches | 95
Conguring Clock Synchronizaon Opons | 95
Connecng the EX9253 to the Network | 99
Install a Transceiver | 99
Connect a Fiber-Opc Cable | 102
Conguring Junos OS on the EX9253 | 103
EX9253 Switch Default Conguraon | 103
Connecng and Conguring an EX9253 Switch | 104
4
Maintaining Components
Roune Maintenance Procedures for EX9253 Switches | 110
Maintaining the EX9253 Cooling System | 110
Removing a Fan Tray from an EX9253 Switch | 111
Installing a Fan Tray in an EX9253 Switch | 112
Maintaining the Fan Tray in EX9253 Switches | 114
Removing the Air Filter Unit from an EX9253 Switch | 116
Installing the Air Filter Unit in an EX9253 Switch | 117
Removing the Air Filter from the Air Filter Unit in an EX9253 Switch | 118
Installing the Air Filter in the Air Filter Unit in an EX9253 Switch | 120
Maintaining the Air Filter in EX9253 Switches | 121
Maintaining the EX9253 Power System | 122
Powering O an EX9253 Switch | 122
Removing an AC Power Supply from an EX9253 Switch | 124
Installing an AC Power Supply in an EX9253 Switch | 125
v

Removing a DC Power Supply in an EX9253 Switch | 127
Installing a DC Power Supply in an EX9253 Switch | 129
Maintaining Power Supplies in EX9253 Switches | 131
Maintaining the EX9253 Roung Engine | 132
Removing a Roung Engine from an EX9253 Switch | 132
Installing a Roung Engine in an EX9253 Switch | 134
Maintaining the EX9253 Line Cards | 136
Handling and Storing Line Cards | 137
Holding a Line Card | 137
Storing a Line Card | 139
Maintaining Line Card Cables | 140
Removing a Line Card from an EX9253 Switch | 140
Installing a Line Card in an EX9253 Switch | 143
Maintaining Transceivers | 145
Remove a Transceiver | 146
Install a Transceiver | 148
Remove a QSFP28 Transceiver | 151
Install a QSFP28 Transceiver | 153
Maintain Fiber-Opc Cables | 155
Connect a Fiber-Opc Cable | 156
Disconnect a Fiber-Opc Cable | 157
How to Handle Fiber-Opc Cables | 157
5
Troubleshoong Hardware
Troubleshoong EX9253 Components | 160
Troubleshoong the Cooling System in an EX9253 Switch | 160
Troubleshoong the Power Supply in an EX9253 Switch | 161
Troubleshoong Line Cards in an EX9253 Switch | 163
vi

Troubleshoot Temperature Alarms in EX Series Switches | 165
Understand Alarm Types and Severity Levels on EX Series Switches | 171
Chassis Component Alarm Condions on EX9253 Switches | 172
Monitor System Log Messages | 179
6
Contacng Customer Support and Returning the Chassis or Components
Returning an EX9253 Chassis or Components | 188
Returning an EX9253 Switch or Component for Repair or Replacement | 188
Locang the Serial Number on an EX9253 Switch or Component | 189
Locang the Serial Number ID Label on an EX9253 Switch Chassis | 190
Locang Serial Number ID Labels on FRU Components | 190
Contact Customer Support to Obtain Return Material Authorizaon | 193
Packing an EX9253 Switch or Component | 194
Packing an EX9253 Switch | 195
Packing EX9253 Switch Components for Shipping | 196
7
Safety and Compliance Informaon
General Safety Guidelines and Warnings | 199
Denions of Safety Warning Levels | 200
Qualied Personnel Warning | 202
Warning Statement for Norway and Sweden | 202
Fire Safety Requirements | 203
Installaon Instrucons Warning | 204
Chassis and Component Liing Guidelines | 205
Restricted Access Warning | 205
Ramp Warning | 207
Rack-Mounng and Cabinet-Mounng Warnings | 207
Grounded Equipment Warning | 211
Radiaon from Open Port Apertures Warning | 212
vii

Laser and LED Safety Guidelines and Warnings | 213
Maintenance and Operaonal Safety Guidelines and Warnings | 216
General Electrical Safety Guidelines and Warnings | 222
Acon to Take Aer an Electrical Accident | 223
Prevenon of Electrostac Discharge Damage | 224
AC Power Electrical Safety Guidelines | 225
AC Power Disconnecon Warning | 226
DC Power Electrical Safety Guidelines | 227
DC Power Disconnecon Warning | 228
DC Power Grounding Requirements and Warning | 230
DC Power Wiring Sequence Warning | 230
DC Power Wiring Terminaons Warning | 232
Mulple Power Supplies Disconnecon Warning | 233
TN Power Warning | 234
Agency Approvals for EX9253 Switches | 235
Compliance Statements for EMC Requirements for EX Series Switches | 237
Compliance Statements for Acousc Noise for EX Series Switches | 242
viii

About This Guide
Use this guide to install hardware and perform inial soware conguraon, roune maintenance, and
troubleshoong for the EX9253 switch. Aer compleng the installaon and basic conguraon
procedures covered in this guide, refer to the Junos OS documentaon for informaon about further
soware conguraon.
RELATED DOCUMENTATION
EX9253 Switch Quick Start
ix

1
CHAPTER
Overview
EX9253 System Overview | 2
EX9253 Chassis | 12
EX9253 Cooling System | 21
EX9253 Power System | 27
EX9253 Line Cards | 34

EX9253 System Overview
IN THIS SECTION
EX9253 Switch Hardware Overview | 2
EX9253 Switch Conguraons | 7
EX9253 Switch Hardware and CLI Terminology Mapping | 10
EX9253 Switch Hardware Overview
IN THIS SECTION
Soware | 3
Benets of the EX9253 Switch | 3
Chassis Physical Specicaons | 3
Host Subsystem | 4
Line Cards | 5
Cooling System | 5
Power Supplies | 5
ESD Point | 6
Cable Management Brackets | 7
Juniper Networks EX9253 Ethernet Switches provide high performance, scalable connecvity, and
carrier-class reliability for high-density environments such as campus-aggregaon and data-center
networks. The EX9253 switch has a throughput of up to 2.4 terabits per second (Tbps). The EX9253
switch is a modular system that provides redundancy for all major hardware components, including
Roung Engine and power supplies.
You can manage EX9253 switches by using the CLI.
2

Soware
The Juniper Networks EX Series Ethernet Switches run Junos OS, which provides Layer 2 and Layer 3
switching, roung, and security services.
Benets of the EX9253 Switch
Simplied network architecture—EX9253 switches deliver a simple, secure, virtualized network
environment that increases business agility. They are ideal for simplifying campus, data center, and
combined campus and data center network environments by collapsing network layers. In a mulchassis
link aggregaon (MC-LAG) conguraon in the campus, you can use EX9253 switches along with
EX4300, EX3400, and EX2300 switches to eliminate Spanning Tree Protocol (STP); they collapse the
core and aggregaon layers, thereby simplifying the network architecture and network operaons. In a
data center, you can use EX9253 switches to collapse core and aggregaon layers. In combined campus
and data center environments, EX9253 switches consolidate network layers to simplify the network
architecture and operaons.
MACsec support—EX9253-12C8Q-M line card supports IEEE 802.1AE MACsec with AES-256 bit
encrypon, ensuring link-layer data condenality, data integrity, and data origin authencaon.
Chassis Physical Specicaons
The EX9253 switch is three rack units (3 U) in size. Each EX9253 switch is designed to opmize rack
space and cabling.
See Figure 1 on page 3, Figure 2 on page 4, and Figure 3 on page 4.
Figure 1: Front View of an EX9253 Switch
3

1—Host subsystem 2—Line card installed in line card slots MPC0
and MPC1
Figure 2: Rear View of an EX9253 Switch with AC Power Supplies
1—AC power supplies 2—Fan trays
Figure 3: Rear View of an EX9253 Switch with DC Power Supplies
1—DC power supplies 2—Fan trays
Host Subsystem
Switching and roung funconality, system management, and system control funcons of an EX9253
switch are performed by the host subsystem. The host subsystem consists of two Roung Engines.
You must install either one or two Roung Engines in slots labeled RE0 and RE1 on the front panel of
the chassis. A base conguraon EX9253 switch has one Roung Engine. A redundant conguraon
4

EX9253 switch has two Roung Engines. For more informaon, see "EX9253 Switch Conguraons" on
page 7.
Line Cards
The EX9253 switch has two horizontal line card slots. The line cards for EX9253 switches combine a
Packet Forwarding Engine and Ethernet interfaces in a single assembly. Line cards are eld-replaceable
units (FRUs) that you can install in the line card slots labeled MPC0 and MPC1 on the front panel of the
switch chassis.
Table 1 on page 5 lists the line cards available for EX9253 switches.
Table 1: Line Cards for EX9253 Switches
Model Descripon Addional Informaon
EX9253-6Q12C A line card with six built-in QSFP+
ports, each of which can house
QSFP+ pluggable transceivers and
12 built-in QSFP28 ports, each of
which can house QSFP28
pluggable transceivers
"EX9253-6Q12C Line Card" on page 35
EX9253-6Q12C-M A line card with six built-in QSFP+
ports, each of which can house
QSFP+ pluggable transceivers and
12 built-in QSFP28 ports with
Media Access Control Security
(MACsec) capability, each of which
can house QSFP28 pluggable
transceivers
"EX9253-6Q12C-M Line Card" on page
41
Cooling System
The cooling system consists of four hot-removable and hot-insertable fan trays and an air lter and
provides front-to-back chassis cooling (see "EX9253 Cooling System" on page 21).
Power Supplies
Power supplies for the EX9253 switch are fully redundant, load-sharing, and hot-removable and hot-
insertable FRUs. Each EX9253 switch chassis can hold up to six AC or DC power supplies. The power
5

supplies connect to the midplane, which distributes the power to the switch components depending on
their voltage requirements.
Table 2 on page 6 shows the details of the power supplies supported on EX9253 switches.
Table 2: Power Supplies Supported on EX9253 Switches
Power Supply Input Voltage
800 W AC 90–140 VAC
1600 W AC 180–260 VAC
1100 W DC –40 VDC through –72 VDC
A base conguraon EX9253 switch ships with three power supplies. A redundant conguraon
EX9253 switch ships with four power supplies. See "EX9253 Power System" on page 27 and "EX9253
Switch Conguraons" on page 7.
CAUTION: Do not mix dierent types of power supplies (AC and DC) in the same
chassis.
ESD Point
The ESD point on the EX9253 switch is on the front panel (see Figure 4 on page 6).
Figure 4: ESD Point Locaon
6

Cable Management Brackets
The cable management brackets (see Figure 5 on page 7) consists of dividers and are installed on the
front of the chassis. The cable management bracket enables you to route the cables outside the switch
and away from the components on the front panel.
Figure 5: Cable Management Bracket
The air lter unit is installed on the cable management brackets.
EX9253 Switch Conguraons
Table 3 on page 7 lists the hardware conguraons for an EX9253 switch and the components
included in each conguraon.
Table 3: EX9253 Switch Hardware Conguraons
Switch Conguraon Conguraon Components Model Number First Junos
OS
Release
EX9253-BASE-AC Chassis EX9253-CHAS-3RU 18.2R1
One roung engine EX9253-RE
Four fan trays JNP-FAN-3RU
Three AC power supplies JNP-PWR1600-AC
7

Table 3: EX9253 Switch Hardware Conguraons (Connued)
Switch Conguraon Conguraon Components Model Number First Junos
OS
Release
Cable management bracket and air
lter unit
JNP-CM-3RU
Blank panels for empty slots EX9253-LC-BLNK
EX9253-BASE-DC Chassis EX9253-CHAS-3RU 18.2R1
One roung engine EX9253-RE
Four fan trays JNP-FAN-3RU
Three DC power supplies JNP-PWR1100-DC
Cable management bracket and air
lter unit
JNP-CM-3RU
Blank panels for empty slots EX9253-LC-BLNK
EX9253-RED-AC Chassis EX9253-CHAS-3RU 18.2R1
Two roung engines EX9253-RE
Four fan trays JNP-FAN-3RU
Four AC power supplies JNP-PWR1600-AC
Cable management bracket and air
lter unit
JNP-CM-3RU
Blank panels for empty slots EX9253-LC-BLNK
8

Table 3: EX9253 Switch Hardware Conguraons (Connued)
Switch Conguraon Conguraon Components Model Number First Junos
OS
Release
EX9253-RED-DC Chassis EX9253-CHAS-3RU 18.2R1
Two roung engines EX9253-RE
Four fan trays JNP-FAN-3RU
Four DC power supplies JNP-PWR1100-DC
Cable management bracket and air
lter unit
JNP-CM-3RU
Blank panels for empty slots EX9253-LC-BLNK
NOTE: You can install up to two line cards (in any combinaon) in the switch.
NOTE: Line cards are not part of the base or redundant conguraon. You must order them
separately.
NOTE: Addional power supplies (AC or DC) must be purchased separately.
SEE ALSO
EX9253 Power System | 27
EX9253 Cooling System | 21
9

EX9253 Switch Hardware and CLI Terminology Mapping
This topic describes the hardware terms used in EX9253 switch documentaon and the corresponding
terms used in the Junos OS CLI. See Table 4 on page 10.
Table 4: CLI Equivalents of Terms Used in Documentaon for EX9253 Switches
Hardware
Item (CLI)
Descripon (CLI) Value (CLI) Item in
Documentaon
Addional Informaon
Chassis EX9253 EX9253 Switch chassis "Chassis Physical
Specicaons of an
EX9253 Switch" on
page 12
PEM ( n ) One of the
following:
•JNP-PWR1600-
AC
•JNP-PWR1100-
DC
n is a value in the range
0-3. The value
corresponds to the
power supply slot
number.
AC or DC power
supply
"EX9253 Power
System" on page 27
Roung
Engine ( n )
EX9253-RE n is a value in the range
0-1.
In base conguraon,
only one entry appears.
In redundant
conguraon, two
entries appear; one for
each Roung Engine
installed in the chassis.
Roung Engine "Host Subsystem in an
EX9253 Switch" on
page 15
10

Table 4: CLI Equivalents of Terms Used in Documentaon for EX9253 Switches (Connued)
Hardware
Item (CLI)
Descripon (CLI) Value (CLI) Item in
Documentaon
Addional Informaon
FPC ( n ) Abbreviated name
of the line card.
One of the
following:
•EX9253-6Q12C
•EX9253-6Q12C
-M
n is a value in the range
of 0-1. The value
corresponds to the line
card slot number in
which the line card is
installed.
Line card (The switch
does not have actual
FPCs—the line cards
are the FPC
equivalents on the
switch)
•"EX9253-6Q12C
Line Card" on page
35
•"EX9253-6Q12C-
M Line Card" on
page 41
PIC ( n ) Abbreviated name
of the Physical
Interface Card
(PIC).
n is a value in the range
0-1. The value
corresponds to the slot
number in which the
PIC is installed.
Abbreviated name of
the Physical Interface
Card (PIC)
•"EX9253-6Q12C
Line Card" on page
35
•"EX9253-6Q12C-
M Line Card" on
page 41
Xcvr ( n ) Abbreviated name
of the transceiver.
n is a value equivalent
to the number of the
port in which the
transceiver is installed.
Opcal transceivers "Pluggable
Transceivers
Supported on an
EX9253 Switch" on
page 57
Fan tray ( n ) JNP FAN 3RU n is a value equivalent
to the number of the
port in which the fan
tray is installed.
Fan tray "EX9253 Cooling
System" on page 21
11