Black Box LGB5028A-R2 User manual

24/7 TECHNICAL SUPPORT AT 1.877.877.2269 OR VISIT BLACKBOX.COM
INSTALLATION & GETTING STARTED GUIDE
GBE
MANAGED
SWITCHES
LGB5028A-R2, LGB5052A-R2
1 3 5 972 4 6 8 10 12 14 18 20 22 24 25 26 27 28
16
11 13 15 17 19 21 2323
SFP/SFP+
System
Link/Act
Speed
Mode
28-PORT GbE MANAGED SWITCH
25 26
135 2
SFP/SFP+
System
Link/Act
Speed
Mode
28-PORT GbE MANAGED SWITCH
4 6 27 28
7 9 10 12 13 15 17 21 2319 14 16 20 22 2418
118

2
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
TABLE OF CONTENTS
SAFETY INFORMATION.................................................................................................................................................................... 4
RELATED PUBLICATIONS................................................................................................................................................................. 5
REVISION HISTORY .......................................................................................................................................................................... 5
1. INTRODUCTION............................................................................................................................................................................. 6
1.1 Over view ....................................................................................................................................................................................................6
1.2 Front View of the Switch..........................................................................................................................................................................6
1.3 Rear View of the Switch ...........................................................................................................................................................................6
1.4 Switch Architecture..................................................................................................................................................................................7
1.5 Network Management Options...............................................................................................................................................................7
2. HARDWARE DESCRIPTION .......................................................................................................................................................... 8
2.1 1000BASE-T Ports....................................................................................................................................................................................8
2.2 SFP+ Transceiver Slots............................................................................................................................................................................8
2.3 Port and System Status LEDs.................................................................................................................................................................9
3. INSTALLING THE SWITCH.......................................................................................................................................................... 10
3.1 What’s Included ......................................................................................................................................................................................10
3.2 Selecting a Site.......................................................................................................................................................................................10
3.3 Ethernet Cabling.....................................................................................................................................................................................10
3.4 Mounting the Switch in a 19-inch Rack................................................................................................................................................11
3.5 Mounting the Switch on a Desk or Shelf ..............................................................................................................................................12
3.6 Installing an Optional SFP Transceiver ................................................................................................................................................13
3.7 Connecting to a Power Source..............................................................................................................................................................14
3.8 Connecting to the Console Port............................................................................................................................................................15
3.9 Wiring Map for Serial Cable (LGB5028A-R2 Only)...............................................................................................................................15
3.10 Operation of Web-Based Management ..............................................................................................................................................16
4. MAKING NETWORK CONNECTIONS......................................................................................................................................... 17
4.1 Connecting Network Devices................................................................................................................................................................17
4.2 Twisted-Pair Devices .............................................................................................................................................................................17
4.3 Cabling Guidelines .................................................................................................................................................................................17
4.4 Connecting to PCs, Servers, Hubs and Switches................................................................................................................................17
4.5 Network Wiring Connections ................................................................................................................................................................18
4.6 Fiber Optic SFP Devices ........................................................................................................................................................................18
4.7 Connectivity Rules..................................................................................................................................................................................19
4.8 1000BASE-T and Fiber Cable Requirements .......................................................................................................................................19

3
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
TABLE OF CONTENTS
5. CABLE LABELING CONNECTION AND RECORDS .................................................................................................................... 21
6. TROUBLESHOOTING................................................................................................................................................................... 22
7. POWER AND COOLING PROBLEMS ........................................................................................................................................... 23
7.1 Installation...............................................................................................................................................................................................23
7.2 In-Band Access.......................................................................................................................................................................................23
8. SPECIFICATIONS......................................................................................................................................................................... 24
APPENDIX A. REGULATORY INFORMATION................................................................................................................................ 26
A.1 FCC Statement .......................................................................................................................................................................................26
A.2 NOM Statement .....................................................................................................................................................................................27
APPENDIX B. DISCLAIMER/TRADEMARKS ................................................................................................................................. 28
B.1 Disclaimer ...............................................................................................................................................................................................28
B.2 Trademarks Used in this Manual ..........................................................................................................................................................28
The switch’s default values are listed below:
IP Address: 192.168.1.1
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.254
Username: admin
Password: <none> (Just press the Enter key.)

41. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
SAFETY INFORMATION
SAFETY INFORMATION
CAUTION: Circuit devices are sensitive to static electricity, which can damage their delicate electronics. Dry weather conditions
or walking across a carpeted floor may cause you to acquire a static electrical charge.
To protect your device, always:
Touch the metal chassis of your computer to ground the static electrical charge before you pick up the circuit device.
Pick up the device by holding it on the left and right edges only.
If you need to connect this device to an outdoor device, add an arrester on the cable between the outdoor device and this device.
NOTE: The switch is indoor device; if it will be used in an outdoor environment or connects with an outdoor device, you must use
a lightning arrester to protect the switch.
WARNING:
Self-demolition on the product is strictly prohibited. Damage caused by self-demolition will be charged repairing fees.
Do not place product at outdoor or sandstorm..
Before installation, make sure the input power supply and product specifications are compatible with each other.
To reduce the risk of electric shock, disconnect all AC or DC power cord and RPS cables to completely remove power from the unit.
Before importing/exporting a configuration, make sure the firmware version is always the same.
After a firmware upgrade, the switch will replace the configuration automatically with the latest firmware version.
WARNING: EYE HAZARD! The SFP modules are Class 1 laser devices. Do not look direcly at the beam coming from the transmit
port.

5
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
RELATED PUBLICATIONS/REVISION HISTORY
RELATED PUBLICATIONS
The following publications give specific information on how to operate and use the management functions of the switch:
GUI User Guide
CLI User Guide
To download the user guides from blackbox.com:
1. Go to www.blackbox.com
2. Enter the part number in the search box (for example, LGB5028A-R2 or LGB5052A-R2).
3. Click on the product in the “Products” page.
4. Click on the “Support” tab on the product page and select the document you wish to download.
REVISION HISTORY
Current version: Release 6.38, Revision A1

6
CHAPTER 1: HEADLINE
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
CHAPTER 1: INTRODUCTION
1.1 OVERVIEW
This LGB5028A-R2, LGB5052A-R2 Gigabit Ethernet (GbE) Managed Switches offer a full suite of L2 Ethernet Switch features and
additional 10GbE uplink connections, including advanced L3 features such as Static Route for Enterprise networks via fiber or
copper connections.
LGB5028A-R2 has 24 (10M/100M/1G) RJ-45 ports, 4 GbE/10G SFP+ ports and DB9 console port.
LGB5052A-R2 has 48 (10M/100M/1G) RJ-45 ports, 4 GbE/10G SFP+ ports and an RJ-45 console port.
Both switches provide high hardware performance and environment flexibility for SMBs and Enterprises.
The switches are ideal to deliver management simplicity, optimum user experience, and lower cost. The embedded Device
Managed System is designed to be extremely easy-to-use/manage/install IP Phone, IP Cam, or Wifi-AP for Enterprise Applications.
1.2 FRONT VIEW OF THE SWITCH
10/100/1000
RJ-45 ports
Mode
button
System
LED
Port Status
LEDs
1G/10G
SFP+ ports
Mode
LEDs
FIGURE 1-1. FRONT PANEL OF THE LGB5028A-R2 SWITCH
1.3 REAR VIEW OF THE SWITCH
AC power
socket
Console
port
FIGURE 1-2. BACK PANEL OF THE LGB5028A-R2 SWITCH

7
CHAPTER 1: HEADLINE
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
CHAPTER 1: INTRODUCTION
1.4 SWITCH ARCHITECTURE
The switch performs wire-speed, non-blocking switching. This allows wire-speed transport of multiple packets at low latency on all
ports simultaneously. The switch also features full-duplex capability on all ports, which effectively doubles the bandwidth of each
connection.
This switch uses store-and-forward technology to ensure maximum data integrity. With this technology, the entire packet must be
received into a buffer and checked for validity before being forwarded. This prevents errors from being propagated throughout the
network.
1.5 NETWORK MANAGEMENT OPTIONS
The switch can also be managed over the network with a web browser or Telnet application. The switch includes a built-in network
management agent that allows it to be managed in-band using SNMP or RMON (Groups 1, 2, 3, 9) protocols. The LGB5028A-R2 has
a DB9 console port and the LGB5052A-R2 has an RJ-45 console port connector for out-of-band management.
A PC may be connected to this port for configuration and monitoring out-of-band via a null-modem serial cable.
NOTE: For a detailed description of the management features, refer to the user guides.

8
CHAPTER 1: HEADLINE
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
CHAPTER 2: HARDWARE DESCRIPTION
2.1 1000BASE-T PORTS
The switch contains 24 or 48 1000BASE-T RJ-45 ports. All RJ-45 ports support automatic MDI/MDI-X operation, auto-negotiation
and IEEE 802.3x auto-negotiation of flow control, so the optimum data rate and transmission can be selected automatically.
2.2 SFP+ TRANSCEIVER SLOTS
The LGB5028A-R2 or LGB5052A-R2 switch supports the Small Form Factor Pluggable (SFP+) transceiver slots on ports 25-28
or 49-52.
The following table shows a list of transceiver types that have been tested with the switch. For an updated list of vendors supplying
these transceivers, contact your local dealer. For information on the recommended standards for fiber optic cabling, see Section
4.8 in Chapter 4.
TABLE 2-1. COMPATIBLE SFP/SFP+ MODULES
PRODUCT CODE DESCRIPTION
LFP411 SFP, 1250-Mbps Fiber with Extended Diagnostics, 850-nm Multimode, 550 m LC
LFP412 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Multimode, 2 km LC
LFP413 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, 10 km LC
LFP414 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, 30 km LC
LFP415 SFP with SerDes Interface, 1250 Mbps, RJ45, 1000BASE-T, Extended Diagnostics
LFP416 SFP with SGMII Interface, 1250 Mbps, RJ45, 10/100/1000BASE-T, Extended Diagnostics
LFP417 SFP with SerDes Interface, 1250 Mbps, RJ45, 1000BASE-T, Extended Diagnostics
LFP418 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1550-nm Single-Mode, 80 km, LC
LFP420 SFP, 1250-Mbps Simplex Fiber with Extended Diagnostics, 1550-nm TX, 1310-nm RX, Single-Mode, 10 km, LC
LFP421 SFP, 1250-Mbps Simplex Fiber with Extended Diagnostics, 1310-nm TX, 1550-nm RX, Single-Mode, 10 km, LC
LFP401 SFP, 155-Mbps Fiber with Extended Diagnostics, 850-nm Multimode, 2 km, LC
LFP402 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Multimode, 2 km, LC
LFP403 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, 30 km, LC
LPF404 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, 60 km, LC

9
CHAPTER 1: HEADLINE
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
CHAPTER 2: HARDWARE DESCRIPTION
2.3 PORT AND SYSTEM STATUS LEDS
The LGB5028A-R2 and LGB5052A-R2 switches include a display panel for system and port indications that simplify installation and
network troubleshooting. The LEDs are located on left hand side of the front panel for easy viewing. Details are shown below and
described in the following tables.
TABLE 2-2. MODE STATUS LEDS
LED CONDITION STATUS
TP Link/Act Green/Blinking Lights Green when TP link is good
Blinks when any traffic is present
TP Speed Green/Yellow Lights Green when TP link is running at 1000 Mbps
Yellow when TP link is running at 10/100 Mbps
SFP Link/Act Green/Blinking Lights ON Green when SFP link is good
Blinks when any traffic is present
SFP Speed Blue/Green Lights Blue when SFP link is running at 10 Gbps
Lights Green when SFP link is running at 1000 Mbps
TABLE 2-2. SYSTEM STATUS LED
SYSTEM LED CONDITION STATE
Power Green Lights ON when power is coming up
OFF Power is OFF

10
CHAPTER 1: HEADLINE
1. 8 7 7. 8 7 7. 2 2 6 9 BLACKBOX.COM
NEED HELP?
LEAVE THE TECH TO US
LIVE 24/7
TECHNICAL
SUPPORT
1.877.877.2 269
CHAPTER 3: INSTALLING THE SWITCH
3.1 WHAT’S INCLUDED
Your package should include the following items. If anything is missing or damaged, contact Black Box Technical Support
at 877-877-2269 or [e-mail]
28-Port or 52-Port Gigabit Ethernet (GbE) Managed Switch
Rackmount brackets and hardware
AC power cord
DB9 console cable (for LGB5028A-R2) or RJ-45 console cable (for LGB5052A-R2)
(4) adhesive rubber feet
This Installation and Getting Started Guide
WARNING: EYE HAZARD! The SFP modules are Class 1 laser devices. Do not look direcly at the beam coming from the transmit
port.
3.2 SELECTING A SITE
The Switch can be mounted in a standard 19-inch equipment rack (via an included rackmount kit) or on a flat surface. Be sure to
follow the guidelines below when choosing a location.
The site should:
Be at the center of all the devices you want to link and near a power outlet.
Be able to maintain its temperature within 32 to 113° F 0 to 45° C) and its humidity within 10% to 90%, non-condensing.
Be accessible for installing, cabling and maintaining the devices.
Allow the status LEDs to be clearly visible.
Make sure the twisted-pair Ethernet cable is always routed away from power lines, radios, transmitters or any other electrical
interference.
Make sure that LGB5028A-R2, LGB5052A-R2 10Port Series Switch is connected to a separate grounded power outlet that provides
100 to 240 VAC, 50 to 60 Hz.
3.3 ETHERNET CABLING
To ensure proper operation when installing the switch into a network, make sure that the current cables are suitable
for 100BASE-TX or 1000BASE-T operation. Check the following criteria against the current installation of your network:
Cable type: We recommend using Unshielded twisted pair (UTP) or shielded twisted pair (STP) cable with RJ-45 connectors;
Category 5 or Category 5e with maximum length of 328 feet (100 meters) for 100BASE-TX, and Category 5e or 6 with maximum
length of 328 feet (100 meters) for 1000BASE-T.
Protection from radio frequency interference emissions.
Electrical surge suppression.
Separation of electrical wires and data based network wiring.
Safe connections with no damaged cables, connectors or shields.