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2014 - 04
Rev. A00
Contents
1 About this Guide........................................................................................................5
Information Symbols and Warnings..................................................................................................... 5
Related Documents...............................................................................................................................6
2 The S4820T Switch...................................................................................................7
Determine System Status......................................................................................................................9
LED Displays........................................................................................................................................ 10
3 Site Preparations..................................................................................................... 13
Site Selection....................................................................................................................................... 13
Contacting the Technical Assistance Center.....................................................................................57
Requesting a Hardware Replacement................................................................................................59
1
About this Guide
This guide provides site preparation recommendations, step-by-step procedures for rack mounting and
desk mounting, inserting optional modules, and connecting to a power source.
After you have completed the hardware installation and powered up the S4820T refer to the FTOS Configuration Guide for the S4820T System for software configuration information. For command line
interface (CLI) information, refer to the FTOS Command Line Reference Guide for the S4820T System.
NOTE: User port stacking requires Dell Networking operating system (FTOS) version 8.3.19.0
NOTE: For information about upgrading the S4820T system, refer to the FTOS Release Notes for the S4820T System. If you have any questions regarding FTOS versions and system upgrades, contact
Dell Networking Technical Support.
CAUTION: To avoid electrostatic discharge (ESD) damage, wear grounding wrist straps when
handling this equipment.
WARNING: Only trained and qualified personnel can install this equipment. Read to this guide
before you install and power up this equipment. This equipment may contain two power cords.
Disconnect both power cords before servicing.
WARNING: This equipment contains optical transceivers, which comply with the limits of Class 1
laser radiation.
WARNING: When no cable is connected, visible and invisible laser radiation may be emitted from
the aperture of the optical transceiver ports. Avoid exposure to laser radiation and do not stare
into open apertures.
Information Symbols and Warnings
This book uses the following information symbols:
NOTE: The Note icon signals important operational information.
CAUTION: The Caution icon signals information about situations that could result in equipment
damage or loss of data.
WARNING: The Warning icon signals information about hardware handling that could result in
injury.
WARNING: The ESD Warning icon requires that you take electrostatic precautions when handling
the device.
About this Guide
5
Related Documents
This document provides detailed hardware installation and power-up instructions to get new systems up
and running and ready for configuration.
For more information about the S4820T system, refer to the following documents:
Table 1. S4820T Documents
InformationDocumentation
Software configurationFTOS Configuration Guide for the S4820T System
Command line interfaceFTOS Command Line Reference Guide for the
S4820T System
Latest updatesFTOS Release Notes for the S4820T System
6
About this Guide
2
The S4820T Switch
This chapter contains general features, capabilities, and physical configurations that the S4820T supports.
This chapter also contains a list of optional parts available for purchase.
Introduction
The S4820T system is a top-of-rack (ToR) switch/router product for copper connections to 10Gbps
servers and 40Gbps optical uplinks to the 40Gbps switching fabric in the core. The S4820T has 48 ports
of RJ-45 10GBase-T and four ports of 40Gbps with features and functions similar to the S4810 product.
The S4820T power supply unit (PSU) side, shown in the following figure, contains the PSU, fan modules,
and console ports.
Figure 1. S4820T PSU-Side View
1.PSU 12.Fan Modules
3.PSU 2
The S4820T input/output (I/O) side, shown in the following figure, contains the 48 10Gbps RJ-45 autosensing ports, four 40Gbps QSPFP+ ports, a universal serial bus port (USB), and stacking identification
light emitting diodes (LEDs).
The S4820T Switch
7
Figure 2. S4820T I/O-Side View
1.10GBase-T Ports2.QSFP+ Ports
3.USB Port
NOTE: The RJ-45 ports on the I/O side are labeled 0-47. When you cable these ports, be sure not
to interfere with the airflow from the small vent holes above and below the ports.
The S4820T switch runs the Dell Networking operating system (FTOS), providing switching, bridging, and
routing functionality for transmitting data, storage, and server traffic.
In a data center network, the S4820T switch provides converged network support and inter-operates
with Dell and third-party ToR devices. The switch supports data center bridging (DCB) features and
optimizes connectivity between servers and storage devices using Fibre Channel over Ethernet (FCoE)
and internet small computer system interface (iSCSI) links.
By providing increased 40GbE bandwidth for device interconnection in a shared network storage
environment (with the possibility of splitting 40GbE quad small form-factor pluggable plus (QSFP+)
uplinks into four 10GbE SFP+ or RJ-45 connections), the S4820T switch is perfectly positioned to help
transition a data center with multiple speed requirements.
Additionally, the S4820T solution is optimized to provide 10Gbps throughput for distances of up to:
•330 feet (100 meters) over Cat6, 6A, and 7 shielded copper cable and Cat6A UTP copper cable
•181.5 feet (55 meters) over Cat6 UTP copper cable
Prerequisites
Detailed installation instructions for the S4820T are provided in Site Preparationsand in Install the
Hardware sections. To successfully install the S4820T, ensure that you have the following:
•S4820T chassis (or multiple chassis, if stacking)
•At least one grounded AC or DC power source per chassis
•Cable to connect the AC or DC power source to the chassis (US AC power cables included)
•Mounting brackets for rack installation (included)
•Screws for rack installation and #1 and #2 Phillips screwdrivers (not included)
•Ground cable (not included)
•Ground cable screws (included)
•Copper/fiber cables
8
The S4820T Switch
Other optional components are:
•Additional power supply unit
•Additional fan module
•Additional mounting brackets (if installing in a four-post rack or cabinet)
Features
The S4820T offers the following:
•Forty-eight 1/10Gbps RJ-45 ports
•Four fixed 40Gbps QSFP+ ports for 40Gbps transceivers
•One universal serial bus (USB Type-A) port for additional file storage
•On-board high-performance central processing unit (CPU) system with large memory, P2020/128 MB
NOR Flash/2GB DDR III RAM.
•Temperature monitoring (TMP75)
•Software-readable thermal monitor
•Real time clock (RTC) support
•Hot-plugging redundant power supply
•Current monitoring for Power management
•Removable fan that you can manage
•Standard 1U chassis high
Physical Dimensions
The S4820T has the following physical dimensions:
•434 x 460 x 43.5 mm (W x D x H).
•17.09 x 18.11 x 1.71 inches (W x D x H).
Chassis Ports
The following is a list of the standard ports located on each S4820T chassis:
•Serial RS-232 port (RJ-45 type)
•Out of band Ethernet management port (RJ-45 type)
•Forty-eight 1/10Gbps RJ-45 ports
•Four 40Gbps QSFP+ ports for four 40Gbps transceivers
•One universal serial bus port (USB Type-A)
Determine System Status
You can view S4820T status information in several ways, including light emitting diodes (LEDs) and boot
menu options.
You can also view status information through the command line interface (CLI) show commands and
with simple network management protocol (SNMP) traps. For more information about these options,
The S4820T Switch
9
refer to the FTOS Command Line Reference Guide for the S4820T System and the FTOS Configuration Guide for the S4820T System.
LED Displays
As shown in the following figures, the S4820T includes LED displays on the front and back of the chassis.
The tables provide a detailed description of each LED’s meaning.
Figure 3. Port LEDs
1.Diag LED (Green)2.Temp LED (Red)
3.Stack LED (Blue/Green)4.Locator LED (Blue)
5.FAN LED (Green/Red)6.System LED
7.Link LED (Green/Yellow)8.Activity LED (Blinking Green)
Table 1 provides a detailed description of each LED for the S4820T system.
Table 2. System LED Displays
FeatureLED Color/DisplayComment
System LED
TEMP LED
•Solid blue –— Normal
Operation
•Blinking blue –— Booting
•Solid red –— Critical system
error
•Blinking red –— Non-critical
system error (fan fail, power
supply fail)
•Off –— Normal temperature
•Solid red–Overtemp (Refer to
the NOTE that follows this
table.)
I/O side
PSU side
10
The S4820T Switch
FeatureLED Color/DisplayComment
DIAG LED
•Off –— Normal operating
PSU side
•Solid green –— System
Booting or Diagnostics
FAN LED
•Solid green –— Fan powered
PSU side
and running at the expected
rpm
•Solid red –— Fan failed
STACK LED
•Solid blue –— Switch in
PSU side
stacking master mode
•Solid green –— Switch in
stacking slave mode
•Off –— Switch in stand-alone
mode
LOCATOR LED
•Blinking blue –— Locator
PSU side
function is enabled
•Solid blue –— Locator
function is disabled
NOTE: The system temperature threshold is 75°C. When one of the thermal sensors exceeds this
temperature, the TEMP LED turns RED.
Table 3. 10GBT Ethernet Port LEDs
FeatureLED Color/Display
Link LED
•Off –— No Link
•Solid green –— Link on 10Gbps speed
•Solid Amber –— Link on 100M or 1Gbps speeds
Activity LED
•Off –— No Link
•Blinking green –— Transmit/Receive is active
Table 4. QSFP+ Port LEDs
FeatureLED Color/Display
Link LED
•Off –— No Link
•Solid green –— Link on 40Gbps speed
•Solid amber –— Link on other speeds
Activity LED
•Off –— No Link
•Blinking green –— Transmit/Receive is active
Table 5. OOB Ethernet Port LEDs
FeatureLED Color/Display
Link LED
•Off –— No Link
•Solid green –— Link on 1Gbps speed
The S4820T Switch
11
FeatureLED Color/Display
•Solid amber –— Link on 100M or 10M speeds
Activity LED
•Off –— No Link
•Blinking green –— Transmit/Receive is active
Orderable S4820T Components
You can order the S4820T system in several different configurations. You can also order optional
modules and optics separately.
You can order the following supported hardware components.
•S4820T AC Normal Airflow: 48 port 10G RJ-45 ports with 4 QSFP+ 40G ports, 1 AC power supply and
2 fan subsystems (airflow from I/O side to power supply side)
•S4820T AC Reverse Airflow: 48 port 10G RJ-45 ports with 4 QSFP+ 40G ports, 1 AC power supply and
2 fan subsystems (airflow from power supply side to I/O side)
•S4820T AC Normal Airflow: 48 port 10G RJ-45 ports with 4 QSFP+ 40G ports, 1 DC power supply and
2 fan subsystems (airflow from I/O side to power supply side)
•S4820T AC Reverse Airflow: 48 port 10G RJ-45 ports with 4 QSFP+ 40G ports, 1 DC power supply
and 2 fan subsystems (airflow from power supply side to I/O side)
•S4820T Series — Fan with airflow from the I/O side to the PSU side
•S4820T Series — Fan with airflow from the PSU side to the I/O side
•S4820T Series — AC Power supply with airflow from the I/O side to the PSU side
•S4820T Series — AC Power supply with airflow from the PSU side to the I/O side
•S4820T Series — DC Power supply with airflow from the I/O side to the PSU side
•S4820T Series — DC Power supply with airflow from the PSU side to the I/O side
12
The S4820T Switch
3
Site Preparations
The S4820T is suitable for installation as part of a common bond network (CBN).
You can install the system in:
•network telecommunication facilities
•data centers
•other locations where the National Electric Code (NEC) applies
For S4820T specifications, refer to Technical Specifications.
NOTE: Install the S4820T system into a rack or cabinet before installing any optional components.
Site Selection
Install Dell Networking equipment in restricted access areas. A restricted access area is one in which
access can only be gained by service personnel by using a special tool, lock, key or other means of
security and access is controlled by the authority responsible for the location.
Ensure that the area where you install your S4820T system meets the following safety requirements:
•Near an adequate power source. Connect the system to the appropriate branch circuit protection as
defined by your local electrical codes.
•Environmental temperature between 32° to 104°F (from 0° to 40°C).
•Relative humidity that does not exceed 85% noncondensing.
•In a dry, clean, well-ventilated and temperature-controlled room, away from heat sources such as hot
air vents or direct sunlight.
•Away from sources of severe electromagnetic noise.
•Positioned in a rack or cabinet, or on a desktop with adequate space in the front, rear, and sides of the
S4820T for proper ventilation and access.
Cabinet Placement
Install the S4820T only in indoor cabinets designed for use in a controlled environment.
Do not install the S4820T in outside plant cabinets. For cabinet placement requirements, refer to Site
Selection.
The cabinet must be a minimum cabinet size. Airflow must be according to the Electronic Industries
Alliance (EIA) standard.
Site Preparations
13
Rack Mounting
When you prepare your equipment rack, ensure that the rack is earth ground.
Ground the equipment rack to the same ground point the power service in your area uses. The ground
path must be permanent.
Grounding
Use the S4820T in a common bond network (CBN).
Connect the grounding cables as described in Attaching the Ground Cable.
Fans and Airflow
The S4820T fans support two airflow options.
Be sure to order the fans suitable to support your site’s ventilation. Use a single type of airflow fan in your
system. Do not mix reverse and normal airflows in a single S4820T chassis.
•Normal — airflow is from the I/O panel to the power supply
•Reversed — airflow is from the power supply to the I/O panel
For proper ventilation, position the S4820T in an equipment rack (or cabinet) with a minimum of five
inches (12.7cm) of clearance around the exhaust vents. When you install two S4820T systems near each
other, position the two chassis at least five inches (12.7cm) apart to permit proper airflow. The acceptable
ambient temperature ranges are listed in Technical Specifications.
The fan speed increases when the internal temperature reaches 72°C and decreases to normal speed
when the temperature falls to 58°C. The switch never intentionally turns off the fans.
To see the log messages, use the show logging command. For more information, refer to the System
chapters of the FTOS Command Line Reference Guide for the S4820T System and FTOS
Logs
Configuration Guide for the S4820T System.
NOTE: Power Supplies and Fan Modules are field replaceable units. Dell Networking does not
support a mix of power supply types (such as, AC and DC) in the same switch. If a power supply is
added or replaced, it MUST match the existing type of power supply (such as, AC and AC or DC and
DC).
Power
To connect the chassis to the applicable power source, use the appropriate power cord with the S4820T
system.
A country/region-specific AC or DC power cord is included with the system.
When installing AC systems, follow the requirements of the National Electrical Code, ANSI/NFPA 70
where applicable.
The system is powered-up as soon as the power cord is connected between the system and the power
source.
14
Site Preparations
CAUTION: Always disconnect the power cable before you service the power supply slots.
CAUTION: Use the power supply cord as the main disconnect device on the AC system. Ensure
that the socket-outlet is located/installed near the equipment and is easily accessible.
Storing Components
If you do not install your S4820T and components immediately, Dell Networking recommends properly
storing the system and all optional components until you are ready to install them.
WARNING: Electrostatic discharge (ESD) damage can occur when components are mishandled.
Always wear an ESD-preventive wrist or heel ground strap when handling the S4820T and its
accessories. After you remove the original packaging, place the S4820T and its components on
an antistatic surface.
Follow these storage guidelines:
•Storage temperature must remain constant ranging from -4° to 158°F (-20°C to 70°C).
•Store on a dry surface or floor, away from direct sunlight, heat, and air conditioning ducts.
•Store in a dust-free environment.
Site Preparations
15
16
4
Install the Hardware
Always handle the S4820T and its components with care. Avoid dropping the system or its field
replaceable units (FRUs). Dell Networking recommends completing the installation procedures in the
order presented in this document.
Before installing the switch, verify that you meet these guidelines:
•You have enough clearance to the front of the switch so you can read the light emitting diodes
(LEDs).
•The AC/DC power cord reaches from the power outlet to the Utility-panel connector.
•The switch is rack-mounted before you power it up.
•Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent lighting.
Ensure the cabling is safely away from other devices that might damage the cables. If needed, allow
one rack unit (RU) space between devices to provide room for cabling.
•Airflow around the switch and through the vents is unrestricted.
•Temperature around the unit does not exceed 104°F (40°C). If the switch is in a closed or multirack
assembly, the temperature might be higher than normal room temperature.
•Humidity around the switch does not exceed 85 percent.
•Altitude at the installation site is below 6600 feet.
•You install the switch in an environment as free as possible from dust and foreign conductive material
(such as metal flakes from construction activities). Cooling mechanisms, such as fans and blowers in
the switch, can draw dust and other particles causing contaminant buildup inside the chassis, which
can result in system malfunction.
Unpacking the Switch
The S4820T and its accessories are shipped in multiple boxes.
Before unpacking the switch, inspect the container and immediately report any evidence of damage.
Verify that you have received your ordered items. For example, if you order one S4820T switch, the
following items are included.
WARNING: If any item is missing or damaged, contact your Dell Networking representative or
reseller for instructions.
WARNING: Electrostatic discharge (ESD) damage can occur if components are mishandled.
Always wear an ESD-preventive wrist or heel ground strap when handling the S4820T and its
components.
•One S4820T switch
•One power supply (either AC or DC)
•Two sets of rail kits (no tools required)
•One RJ-45 to DB-9 female cable
•One AC or DC power cord for AC or DC units (country/region specific)
•Getting Started Guide
•Safety and Regulatory Information
Install the Hardware
17
•Warranty and Support Information
•Software License Agreement
1.Place the container on a clean, flat surface and cut all straps securing the container.
2.Open the container or remove the container top.
3.Carefully remove all components from the container and place it on a secure and clean surface.
4.Remove all packing material.
5.Inspect the switch and accessories for damage.
Install the Chassis
To install the S4820T system, Dell Networking recommends completing the installation procedures in the
order presented in this document.
You can install the S4820T switch on a rack shelf or mount it directly into a 19–inch wide, EIA-310-Ecompliant rack (four-post, two-post, or threaded methods). Dell Networking provides the Dell
ReadyRails™ system for 1U front-rack and two-post installations. The ReadyRails system includes two
separately packaged rail assemblies and two rails that are shipped attached to the sides of the switch.
NOTE: Always handle the system and its components with care. Avoid dropping the S4820T chassis
or its field replaceable units.
NOTE: For proper ventilation, position the S4820T chassis in an equipment rack (or cabinet) with a
minimum of 5 inches (12.7 cm) of clearance around exhaust vents. The acceptable ambient
temperature ranges are listed in the
Parameters.
NOTE: The illustrations in this document are not intended to represent a specific switch.
Technical Specifications section under Environmental
CAUTION: Always wear an electrostatic discharge (ESD)-preventive wrist or heel ground strap
when handling the S4820T and its components. As with all electrical devices of this type, take
necessary safety precautions to prevent injury when installing this system. ESD damage can occur
if components are mishandled.
WARNING: This is a condensed reference. Read the safety instructions in your Safety,
Environmental, and Regulatory information booklet before you begin.
Rack Mounting Safety Considerations
You can install the S4820T switch on a rack shelf or mount it directly into a 19" wide, EIA-310-Ecompliant rack.
•Rack loading — Overloading or uneven loading of racks may result in shelf or rack failure, which may
damage the equipment and cause personal injury. Stabilize the racks in a permanent location before
loading begins. Mount the components beginning at the bottom of the rack, then work to the top. Do
not exceed your rack load rating.
•Power considerations — Connect only to the power source specified on the unit. When you install
multiple electrical components in a rack, ensure that the total component power ratings do not
exceed the circuit capabilities. Overloaded power sources and extension cords present fire and shock
hazards.
•Elevated ambient temperature — If you install the equipment in a closed rack assembly, the operating
temperature of the rack environment may be greater than the room ambient temperature. Use care
not to exceed the 40°C maximum ambient temperature of the switch.
•Reduced air flow — Install the equipment in the rack so that you do not compromise the amount of
airflow required for safe operation of the equipment.
18
Install the Hardware
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