Arista 7300 Series User manual

ARISTA
Quick Start Guide
7300 Series
Modular Data Center Switches
Arista Networks

PDOC-00040-1 6

Contents
Contents
Chapter 1: Overview................................................................................1
1.1 Scope......................................................................................................................................1
1.2 Receiving and Inspecting the Equipment...............................................................................1
1.3 Installation Process.................................................................................................................1
1.4 Safety Information...................................................................................................................2
1.5 Obtaining Technical Assistance............................................................................................. 2
1.6 Specifications..........................................................................................................................3
Chapter 2: Preparation............................................................................9
2.1 Site Selection..........................................................................................................................9
2.2 Tools Required for Installation............................................................................................. 10
2.3 Electrostatic Discharge (ESD) Precautions..........................................................................11
Chapter 3: Rack Mounting the Switch................................................ 13
3.1 Two-Post Rack Mount..........................................................................................................13
3.1.1 Attaching Mounting Brackets to the Chassis..........................................................13
3.1.2 Inserting the Switch into the Rack..........................................................................14
3.2 Four-Post Rack Mount......................................................................................................... 15
3.2.1 Component Description...........................................................................................15
3.2.2 Component Placement............................................................................................17
3.2.3 Switch Mounting Process....................................................................................... 17
Chapter 4: Powering the Modular Switch...........................................23
4.1 Cabling the AC Power Supply..............................................................................................24
4.1.1 Grounding the Switch............................................................................................. 24
4.1.2 Connecting Power Cables to an AC Power Supply................................................24
4.2 Cabling the DC Power Supply............................................................................................. 25
4.2.1 DC Power Supplies.................................................................................................25
4.2.2 Wire and Lug Preparation...................................................................................... 26
4.2.3 PWR-3K-DC-Blue Power Supply............................................................................28
4.3 DC Power Adapter Installation for PWR-2700-DC-R...........................................................28
4.3.1 Connecting the Power Cable Lug to the Terminal Studs........................................28
4.3.2 Connecting the Ground to PWR-2700-DC-R Power Supply...................................28
Chapter 5: Connecting Serial and Management Cables....................31
5.1 Connecting Supervisor Cables.............................................................................................31
5.2 Connecting Linecard Modules and Cables...........................................................................32
Chapter 6: Configuring the Switch......................................................33
Appendix A: Status Indicators.............................................................35
A.1 Supervisor Module............................................................................................................... 35
A.2 Line Card Module Indicators................................................................................................36
iii

A.3 Fan and Fabric Status Indicators.........................................................................................38
A.4 Power Supply Status Indicators...........................................................................................39
Appendix B: Fabric and Fan-only Module Description..................... 41
B.1 Handling Fabric Modules..................................................................................................... 42
B.1.1 Removing Fabric Modules......................................................................................43
B.1.2 Inserting Fabric Modules........................................................................................44
B.2 Handling Fan-only Modules................................................................................................. 45
B.2.1 Removing Fan-only Modules..................................................................................45
B.2.2 Inserting Fan-only Modules....................................................................................46
Appendix C: Parts List..........................................................................47
C.1 Parts Used in All Configurations..........................................................................................47
C.2 Four-Post Rack Mount Parts............................................................................................... 47
C.3 Four-Post Rack Mount Kit (Optional - 106-575-074-00)......................................................48
C.4 Two-Post Rack Mount Parts................................................................................................48
Appendix D: Front Panels.................................................................... 51
Appendix E: Rear Panels......................................................................55
Appendix F: Line Cards........................................................................59
Appendix G: Taiwan RoHS Information..............................................61
iv

Chapter 1
Overview
1.1 Scope
This guide is intended for properly trained service personnel and technicians who need to install Arista
Networks Data Center Switches.
This guide is intended for the following Arista Networks Data Center Switches:
DCS-7304 DCS-7304X3
DCS-7308 DCS-7308X3
DCS-7316
DCS-7324
DCS-7328
Important: Only qualified personnel should install, service, or replace this equipment.
Seul le personnel qualifié doit installer, service, ou remplacer cet équipement.
1.2 Receiving and Inspecting the Equipment
Upon receiving the switch, inspect the shipping boxes and record any external damage. Retain
packing materials if you suspect that part of the shipment is damaged; the carrier may need to inspect
them.
If the boxes were not damaged in transit, unpack them carefully. Ensure that you do not discard any
accessories that may be packaged in the same box as the main unit.
Inspect the packing list and confirm that you received all listed items. Compare the packing list with
your purchase order. Parts List provides a list of components included with the switch.
1.3 Installation Process
The following tasks are required to install and use the switch:
1. Select and prepare the installation site (Site Selection).
2. Assemble the installation tools listed (Tools Required for Installation).
3. Attach the mounting brackets and install the switch in an equipment rack (Two-Post Rack Mount ).
4. Connect the switch to the power source and network devices ( Powering the Modular Switch and
Connecting Serial and Management Cables).
5. Configure the switch (Configuring the Switch).
Important: Class 1 Laser Product: This product has provisions to install Class 1 laser
transceivers that provides optical coupling to the communication network. Once a Class
1 laser product is installed, the equipment is a Class 1 Laser Product (Appareil à Laser
de Classe 1). The customer is responsible for selecting and installing the Class 1 laser
transceiver and for insuring that the Class 1 AEL (Allowable Emission Limit) per EN/IEC
1

6-825, CSA E60825-1, and Code of Federal Regulations 21 CFR 1040 is not exceeded after
the laser transceiver have been installed. Do not install laser products whose class rating
is greater than 1. Refer to all safety instructions that accompanied the transceiver prior to
installation. Only Class 1 laser devices certified for use in the country of installation by the
cognizant agency are to be utilized in this product.
Produit Laser de classe 1: Ce produit a des dispositions pour installer des émetteurs-
récepteurs de laser de classe 1 qui offre de couplage au réseau de communication
optique.Une fois un produit laser de classe 1 est installé, l'équipement est un produit Laser
de classe 1 (Appareil à Laser de Classe 1).Le client est responsable pour sélectionner
et installer l'émetteur/récepteur de laser de classe 1 et pour assurer que la classe 1 AEL
(limite d'émission admissible) par EN/IEC 60825, CSA E60825-1, et Code des règlements
fédéraux 21 CFR 1040 ne soit pas dépassée après avoir installé l'émetteur/récepteur
de laser. Ne pas installer des appareils à laser dont la cote de classe est supérieure à
1.Voir toutes les consignes de sécurité qui ont accompagné l'émetteur-récepteur avant
l'installation. Seuls appareils laser de classe 1 certifiés pour une utilisation dans le pays
d’installation par l’organisme compétent doivent être utilisées dans ce produit.
Important: Ultimate disposal of this product must be handled in accordance with all
national laws and regulations.
Aucune pièce réparable par l'utilisateur à l'intérieur. Confiez toute réparation à un technicien
qualifié.
The fabric module requires special handling when removing, inserting, or handling the component.
Fabric and Fan-only Module Description provides instructions for handing fabric modules.
1.4 Safety Information
Refer to the Arista Networks document Safety Information and Translated Safety Warnings available
at: https://www.arista.com/en/support/product-documentation.
1.5 Obtaining Technical Assistance
Any customer, partner, reseller or distributor holding a valid Arista Service Contract can obtain
technical support in any of the following ways:
•Email: http://[email protected]. This is the easiest way to create a new service request.
Include a detailed description of the problem and the output of “show tech-support”.
•Web: https://www.arista.com/en/support.
A support case may be created through the support portal on our website. You may also download
the most current software and documentation, as well as view FAQs, Knowledge Base articles,
Security Advisories, and Field Notices.
•Phone: [phone] or [phone].
Note:
No user serviceable parts inside. Refer all servicing to qualified service personnel.
Aucune pièce réparable par l'utilisateur à l'intérieur. Confiez toute réparation à un technicien
qualifié.
2

Overview
1.6 Specifications
Table 1: 7300 Modular Switch and Component Specifications lists specifications of Arista Data Center
modular switches and components covered by this guide.
Table 1: 7300 Modular Switch and Component Specifications
DCS-7304/7324/7304X3 DCS-7308/7328/7308X3 DCS-7316
Height 8 RU: 353mm (13.9
inches) 13 RU: 572 mm (22.5 inches) 21 RU: 930 mm (36.6 inches)
Width 442 mm (17.4 inches) 442 mm (17.4 inches) 442 mm (17.4 inches)
Depth 602 mm (23.7 inches) 602 mm (23.7 inches) 706 mm (27.8 inches)
Weight
Empty 36 kg (78 lbs) 50 kg (110 lbs) 81 kg (178 lbs)
Fully Loaded 89 kg (196 lbs) 140 kg (309 lbs) 244 kg (536 lbs)
Input Power (per circuit)
AC Power 200 - 240 VAC, 16 A (20 A
US), 50 or 60 Hz 200 - 240 VAC, 16 A (20 A US), 50 or 60 Hz 200 - 240 VAC, 16 A (20 A US), 50 or 60
Hz
DC Power -48 - -60 VDC, 80 A -48 - -60 VDC, 80 A -48 - -60 VDC, 80 A
Branch Circuit Protection
AC Power 20 A 20 A 20 A
DC Power 100 A 100 A 100 A
Input Power
Circuits 1 to 4 circuits 2 to 6 circuits 3 to 8 circuits
Operating
Temperature 0° to 40°C (32° to 104°F) 0° to 40°C (32° to 104°F) 0° to 40°C (32° to 104°F)
Storage
Temperature -40° to 70°C (-40° to 158°F) -40° to 70°C (-40° to 158°F) -40° to 70°C (-40° to 158°F)
Operating
Altitude 0 to 3,000 meters (0 to 10,000 feet) 0 to 3,000 meters (0 to 10,000 feet) 0 to 3,000 meters (0 to 10,000 feet)
Relative
Humidity 5 to 90% 5 to 90% 5 to 90%
Cooling 6000 W maximum 9000 W maximum 12000 W maximum
Table 2: 7300 Series Power Specifications lists power specifications of modular switch components.
Table 2: 7300 Series Power Specifications
Module Type Part Number Power Draw Typical /
Maximum
Supervisor Modules DCS-7300(-D)-SUP 65 W / 80 W
3

Linecard Modules DCS-7300X-32Q-LC
DCS-7300X-64S-LC
DCS-7300X-64T-LC
DCS-7320X-32C-LC
DCS-7300X3-32C-LC
DCS-7300X3-48YC4-LC
219 W / 372 W
166 W / 232 W
279 W / 430 W
428 W / 516 W
284 W / 491 W
193 W / 228 W
Fabric Modules DCS-7304X-FM
DCS-7308X-FM
DCS-7316X-FM
DCS-7324X-FM
DCS-7328X-FM
DCS-7304X3-FM
DCS-7308X3-FM
98 W / 172 W
195 W / 343 W
550 W / 760 W
192W / 288 W
380W / 578 W
98 W / 172 W
195 W / 343 W
Fan-Only Modules DCS-7304-S-FAN
DCS-7308-S-FAN
16 W / 32 W
32 W / 64 W
Power Supplies PWR-2700-DC (fan power
PWR-3K-AC (fan power)
PWR-3KT-AC (fan power)
PWR-3K-DC (fan power)
43 W/ 43 W
43 W/ 43 W
43 W/ 43 W
43 W/ 43 W
7304 Series System Full chassis loaded with four
DCS-7300X-64T-LC line cards
1573 W / 3048 W
7308 Series System Full chassis loaded with eight
DCS-7300X-64T-LC line cards
3077 W / 4972 W
7316 Series System Full chassis loaded with
Sixteen
DCS-7300X-64T-LC line cards
6729 W / 10080 W
7324X Series System Full chassis loaded with four
DCS-7320X-32C-LC line cards
2545 W / 3376 W
7328X Series System Full chassis loaded with eight
DCS-7320X-32C-LC line cards
5009 W / 6600 W
7304X3 Series System Full chassis loaded with four
DCS-7300X3-32C-LC line
cards
1885 W / 3078 W
7308X3 Series System Full chassis loaded with eight
DCS-7300X3-32C-LC line
cards
4005 W / 6490 W
4

Overview
Table 3: 7300X Series lists 7300X Series switch components.
Table 3: 7300X Series
Chassis
Model Fabric Module Fan-only Module Fan Spare Line Card Power Supply
DCS-7304
(Forward) DCS-7304X- FM-F DCS-7304-S- FAN-F FAN-7002-F DCS-7300X- 32Q-LC
DCS-7300X-
64S-LC
DCS-7300X-
64T-LC
PWR-3K-AC-
F
PWR-2700-
DC-F
DCS-7304
(Reverse) DCS-7304X- FM-R DCS-7304-S- FAN-R FAN-7002-R DCS-7300X- 32Q-LC
DCS-7300X-
64S-LC
DCS-7300X-
64T-LC
PWR-3K-AC-
R
PWR-2700-
DC-R
DCS-7308
(Forward) DCS-7308X- FM-F DCS-7308-S- FAN-F FAN-7002-F DCS-7300X- 32Q-LC
DCS-7300X
-64S-LC
DCS-7300X-
64T-LC
PWR-3K-AC-
F
PWR-2700-
DC-F
DCS-7308
(Reverse) DCS-7308X- FM-R DCS-7308-S- FAN-R FAN-7002-R DCS-7300X- 32Q-LC
DCS-7300X-
64S-LC
DCS-7300X-
64T-LC
PWR-3K-AC-
R
PWR-2700-
DC-R
DCS-7316
(Forward) DCS-7316X- FM-F Not Available FAN-7002-F DCS-7300X- 32Q-LC
DCS-7300X-
64S-LC
DCS-7300X-
64T-LC
PWR-3K-AC-
F
PWR-2700-
DC-F
PWR-3K-AC-
R
PWR-2700-
DC-R
5

DCS-7316
(Reverse) DCS-7316X- FM-R Not Available FAN-7002-R DCS-7300X- 32Q-LC
DCS-7300X-
64S-LC
DCS-7300X-
64T-LC
PWR-3K-AC-
F
PWR-2700-
DC-F
PWR-3K-AC-
R
PWR-2700-
DC-R
Table 4: 7320X Series lists 7320X Series switch components.
Table 4: 7320X Series
Chassis Model Fabric Module Fan Spare Line Card Power Supply
DCS-7324X
(Forward) DCS-7324X-FM- FFAN-7002H-F DCS-7320X-32C- LC PWR-3KT-AC- BLUE
DCS-7328X
(Forward) DCS-7328X-FM- FFAN-7002H-F DCS-7320X-32C- LC PWR-3KT-AC- BLUE
Table 5: 7320X3 Series lists 7300X3 Series switch components.
Table 5: 7320X3 Series
Chassis Model Fabric Module Fan Spare Line Card Power Supply
DCS-7304X3 DCS-7304X3-FM FAN-7002H-F DCS-7300X3-32C-
LC PWR-3KT-AC- BLUE
DCS-7308X3 DCS-7308X3-FM FAN-7002H-F DCS-7320X-32C-
LC PWR-3KT-AC- BLUE
Table 6: AC/DC PSU Comparison (Circuit, Cabling, and Airflow for DCS-7304, DCS-7308, and
DCS-7316) lists an AC and DC Power Supply Unit (PSU) comparison of circuit, cabling, and airflow for
the DCS-7304, DCS-7308, and DCS-7316.
Table 6: AC/DC PSU Comparison (Circuit, Cabling, and Airflow for DCS-7304, DCS-7308, and
DCS-7316)
Required Cabling and InterconnectModel Supported
Chassis Input Power (Per Circuit) Branch Circuit
Protection Description Qty PSU Air
Flow
PWR-3K-
AC-R
PWR-3K-
AC-F
DCS-7304
DCS-7308
DCS-7316
200 - 240
VAC
16 A (20 A
US)
50 or 60 Hz
20 A Power
cables: 14
AWG, C19-
C20
One for
each AC
power
supply
module
supplied with
switch.
Reverse
(Red)
Forward
(Blue)
6

Overview
PWR-3KT-
AC- BLUE DCS-7304
DCS-7308
200 - 240
VAC
16 A (20 A
US)
50 or 60 Hz
20 A Power
cables: 14
AWG, C19-
C20
One for
each AC
power
supply
module
supplied with
switch.
Forward
(Blue)
PWR-2700-
DC-R
PWR-2700-
DC-F
DCS-7304
DCS-7308
DCS-7316
-48 to -60
VDC
80 A
100 A DC Adapter
(Arista part
number
CON-00581)
2 hole
compression
lug (not
included)
One DC
adapter
per power
supply
2
compression
lugs per DC
Adapter
Reverse
(Red)
Forward
(Blue)
PWR-3K-
DC- BLUE DCS-7304
DCS-7308
-48 to -60
VDC
82.5 A
100 A 2 hole
compression
lug (not
included)
2
compression
lugs per DC
Adapter
Forward
(Blue)
Table 7: Power Supply Setup for LED Status lists the power supply setup for LED status indicators.
Table 7: Power Supply Setup for LED Status
PWR-3K-AC-
Blue PWR-3KT- AC-R PWR-2700- DC-R PWR-3K-DC- Blue
Power
Supply State LED Name
PWR-3K-AC-
Red PWR-3KT-AC -F PWR-2700- DC-F PWR-3K-DC- Red
Input power
present
Normal
Operation
Vin Good
DC Good
Fault
Green
Green
Off
Green
Green
Off
Green
Green
Off
Green
Input power
present
Main output
off
Vin Good
DC Good
Fault
Green
Off
Off
Green
Off
Off
Green
Off
Off
Blinking
Green
Input power
present
Power Supply
Fault
Vin Good
DC Good
Fault
Green
Off
Blinking
Amber
Green
Off
Blinking
Amber
Green
Off
Blinking
Amber
Blinking
Amber, 1 sec
on, 1 sec off
No Input
Power
Supply
installed in
chassis
Vin Good
DC Good
Fault
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
7

Input power
present
Supply not
seated in
chassis
Vin Good
DC Good
Fault
Off
Off
Off
Off
Off
Blinking
Green
Off
Off
Off
Blinking
Amber, 0.5
sec on/off
8

Chapter 2
Preparation
2.1 Site Selection
Describes the location specifications.
Consider the following criteria when selecting a site to install the switch:
Floor Space:Install the switch in an area that provides adequate clearance for removing front and rear
components. Thre following figure displays switch clearance requirements.
Figure 1: Switch Component Removal Footprint
1. Temperature and Ventilation: For proper ventilation, install the switch where there is ample airflow
to the front and back of the switch. The temperature should not go below 0° or exceed 40°C.
Important: To prevent the switch from overheating, do not operate it in an area where the
ambient temperature exceeds 40°C (104°F).
Pour empêcher l'interrupteur de surchauffe, ne pas utiliser il dans une zone où la
température ambiante est supérieure à 40°C (104°F).
2. Airflow Orientation: Determine airflow direction of the fan modules and power supply modules.
Fan and power supply module handles indicate airflow direction:
•Blue Handle: Air Inlet module.
•Red Handle: Air Exit module.
Front Panels displays power supply module locations on the front panel. Rear Panels displays fan
module locations on the rear panel (DCS-7316 switches may also contain rear panel power supply
modules). Verify the airflow direction of all modules satisfy these criteria:
• All rear panel modules have the same color handles.
• All front panel modules have the same color handles.
• Rear panel modules must have different color handles than front panel modules.
Orient the switch to assure that the air intake modules face the cool aisle. If the airflow direction is
not compatible with the installation site, contact your sales representative to obtain modules that
circulate air in the opposite direction.
•Rack Space: Install the switch in a 19" rack or cabinet. The switch height depends on the switch
model, as specified in Table 1: 7300 Modular Switch and Component Specifications . Verify that
the linecard and supervisor removal clearance (Figure 1: Switch Component Removal Footprint )
provide adequate space for the power and data cables that connect to the switch.
9

When mounting the switch in a partially filled rack, load the rack from bottom to top, with the
heaviest equipment at the bottom. Load the switch at the bottom if it is the only item in the rack.
The accessory kit provides mounting brackets for four-post racks. Contact your sales representative
to obtain two-post mounting racks.
•Power Requirements: Power requirements vary by switch. Refer to Table 1: 7300 Modular Switch
and Component Specifications for information regarding your specific system.
Multiple circuits provide redundancy protection. The switch uses power cables that have an
IEC-320 C19 plug. The accessory kit provides IEC-320 C19 to C20 power cables.
Important: All power input plug-socket combinations must be accessible at all times; they
provide the primary method of disconnecting power from the system.
Toutes les combinaisons de fiche-prise d’entrée de puissance doivent être accessibles en
tout temps; ils fournissent le principal moyen de coupure d’alimentation du système.
•Other Requirements: Select a site where liquids or objects cannot fall onto the equipment and
foreign objects are not drawn into the ventilation holes. Verify these guidelines are met:
• Clearance areas to the front and rear panels allow for unrestricted cabling.
• All front and rear panel indicators can be easily read.
• AC power cords can reach from the AC power outlet to the connectors on the front panel.
Important: Disconnecting power to all input sockets is required to completely power off
the unit.
Coupure d’alimentation sur toutes les entrées il faut pouvoir complètement l’appareil hors
tension.
2.2 Tools Required for Installation
Each switch provides an accessory kit that contains parts for installing the switch into a four-post rack.
Two-post rack mount parts are available through your sales representative.
Accessory kits do not include screws, nuts, or bolts for attaching the switch to a conventional rack.
In addition to the accessory kit, the following tools are required to install a modular switch:
All Racks
Mechanical device capable of lifting chassis being installed (chassis weight listed in Table 1: 7300
Modular Switch and Component Specifications ).
Two-Post Conventional Rack
• Screws or rack mounting nuts and bolts.
• Screwdriver.
Four-Post Tool-less Rack
No additional equipment required.
Four-Post Conventional Rack
• Screws or rack mounting nuts and bolts.
• Screwdriver.
10

Preparation
2.3 Electrostatic Discharge (ESD) Precautions
Observe these guidelines to avoid ESD damage when installing or servicing the switch.
• Assemble or disassemble equipment only in a static-free work area.
• Use a conductive work surfaces (such as an antistatic mat) to dissipate static charge.
• Wear an ESD wrist strap to dissipate static charge accumulation.
• Minimize handling of assemblies and components.
• Keep replacement parts in their original static-free packaging.
• Remove all plastic, foam, vinyl, paper, and other static-generating materials from the work area.
• Use tools that do not create ESD.
11

12

Chapter 3
Rack Mounting the Switch
Important: The rack mounting procedure is identical for all modular switches. Illustrations in
this chapter depict the mounting of an unpopulated DCS-7304 chassis.
Les procédure de montage du bâti est identique pour tous les commutateurs modulaires.
Illustrations dans ce chapitre montrent le montage d’un châssis de DCS-7304 inhabité.
•Two-Post Rack Mount provides instructions for mounting the switch in a two-post rack.
•Four-Post Rack Mount provides instructions for mounting the switch in a four-post rack.
After completing the instructions for your rack type, proceed to Powering the Modular Switch .
3.1 Two-Post Rack Mount
To mount the switch to a two-post rack, assemble mounting brackets to the middle of the chassis, then
attach the brackets to the rack.
Important: Two-post rack mount parts are only available through your sales representative.
Two-post rack mounting is not supported for DCS-7316 switches.
Pièces de montage rack à deux montants sont uniquement disponibles par l’intermédiaire de
votre représentant des ventes. Montage en rack de deux-poteau n’est pas supporté pour les
commutateurs DCS-7316.
The accessory kit includes the following two-post mounting parts:
• 2 center-mount brackets.
• 16 (DCS-7304) or 20 (DCS-7308) M4x8 panhead Phillips screws.
3.1.1 Attaching Mounting Brackets to the Chassis
1. Orient the switch chassis and the two center-mount brackets (Figure 2: Attaching the Center-mount
Brackets).
Figure 2: Attaching the Center-mount Brackets
Position the flanges that attach to the rack posts toward the front of the chassis.
13

2. Attach both center-mount brackets to the chassis with the provided M4x8 panhead Phillips screws.
Secure the bracket by attaching screws through each bracket hole.
3.1.2 Inserting the Switch into the Rack
1. Rotate the stabilizer bar from the left shelf toward the right shelf such that the nob at the end of the
stabilizer bar inserts into the notch at the rear of the ledge of the right shelf.
Figure 3: Both Switch Shelves Installed
2. Move the chassis to the rack using a mechanical lift (Figure 4: Lifting the Switch Chassis). If
modules are inserted in the chassis, use the lift carefully to avoid damaging any components.
Figure 4: Lifting the Switch Chassis
3. Lift the chassis into the rack.
4. Secure the chassis by tightening the six thumbscrews on the front flanges into the rack posts.
After completing the Four-Post Installation, proceed to Powering the Modular Switch .
14

Rack Mounting the Switch
3.2 Four-Post Rack Mount
The switch is mounted onto a four-post rack by assembling a shelf into the rack, then attaching the
switch on the shelf.
The four-post rack mount instructions include these sections:
•Component Description
•Component Placement
•Switch Mounting Process
3.2.1 Component Description
The four-post mount accessory kit contains these components:
• 1 Left Shelf and 1 Right Shelf (Shelves)
• 2 Mounting Ears (Mounting Ears)
Note: Components are designed for tool-less installation in square-hole racks. To install the
switch in round hole or threaded hole racks, remove all rack plugs from rail kit, if required
(described below), and attach all components with nuts and bolts that fit the rack.
The finished assembly for rack mounting the device is shown in Figure 6: Left Shelf – Inner View.
Detailed mounting instructions for all rack types start from Shelf Installation.
Figure 5: Switch Shelves Installed
Note: The parts list for rack kit installations for round and threaded hole racks are listed in
Parts List.
3.2.1.1 Shelves
The two shelves are almost identical, differing in that 1) they are mirror-images of each other, and 2)
the left shelf includes a stabilizer bar. Each shelf is a two-piece mechanism. The base includes the
surface upon which the switch is placed and is oriented towards the front of the rack. The slide-end
adjusts the shelf’s length for fitting the shelf between front and rear posts of various size racks.
15

Figure 6: Left Shelf – Inner View displays the inner view of the left shelf. Depending on the rack kit
ordered, each shelf may include latches to the locking mechanism that secures the shelf to the rack. If
the locking mechanism is not present, the kit shall be attached with appropriate screws (not included).
Figure 6: Left Shelf – Inner View displays latches that are closed; the insets display open latches The
inner side of each shelf is oriented toward the center of the rack.
Figure 6: Left Shelf – Inner View
1 Front post attachments 4 Rear post attachments 7 Stabilizer bar (left shelf
only)
2 Front latch (closed) 5 Slide-end 8 Front latch (open)
3 Rear latch (closed) 6 Base 9 Rear latch (open)
Figure 7: Right Shelf – Outer View displays the outside view of the right shelf, from where rack plugs
and guide pins that insert into rack posts are visible (Insets A and B). To install shelves into posts with
threaded or rounded holes, attach the shelves with bolts that fit the rack. Remove all plugs from the
shelves if present.
Figure 7: Right Shelf – Outer View
1 Front post attachments
(Inset A) 4 Rear post attachments (Inset B) 7 Inset B
2 Base 5 Inset A 8 Rack plugs
3 Slide-end 6 Rack plugs
3.2.1.2 Mounting Ears
Figure 8: Mounting Ears displays the mounting ears, which secure the switch top to the rack. The two
mounting ears are identical and installed above each shelf. The inner side of each ear may include a
latch to the locking mechanism that secures the ear to the rack.
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