Black Box LGB1126A-R2 User manual

L G B 11X X S E R I E S
GIGABIT
MANAGED
ENET SWITCH
INSTALLATION AND GETTING STARTED GUIDE
24/7 TECHNICAL SUPPORT AT 1.877.877.2269 OR VISIT BLACKBOX.COM

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TABLE OF CONTENTS
SAFETY INFORMATION............................................................................................................................................................................... 4
RELATED PUBLICATIONS............................................................................................................................................................................ 5
REVISION HISTORY ..................................................................................................................................................................................... 6
1. SPECIFICATIONS...................................................................................................................................................................................... 7
2. OVERVIEW............................................................................................................................................................................................... 11
2.1 Description..........................................................................................................................................................................................................11
2.2 Switch Architecture ...........................................................................................................................................................................................11
2.3 Network Management Options.........................................................................................................................................................................11
2.4 Hardware Description....................................................................................................................................................................................... 12
2.4.1 1000BASE-T Ports........................................................................................................................................................................................................12
2.4.2 SFP Transceiver Slots..................................................................................................................................................................................................12
2.4.3 Port and System Status LEDs....................................................................................................................................................................................12
3. NETWORK PLANNING ........................................................................................................................................................................... 13
3.1 Introduction to Switching ................................................................................................................................................................................. 13
3.2 Application Examples....................................................................................................................................................................................... 13
4. INSTALLING THE SWITCH .................................................................................................................................................................... 14
4.1 Selecting a Site .................................................................................................................................................................................................. 14
4.2 Ethernet Cabling................................................................................................................................................................................................ 14
4.3 Equipment Checklist......................................................................................................................................................................................... 14
4.4 Package Contents............................................................................................................................................................................................. 15
4.5 Mounting............................................................................................................................................................................................................ 15
4.5.1 Rackmounting................................................................................................................................................................................................................16
4.5.2 Desktop or Shelf Mounting.........................................................................................................................................................................................16
4.6 Installing an Optional SFP Transceiver ........................................................................................................................................................... 17
4.7 Connecting to a Power Source......................................................................................................................................................................... 17
4.8 Connecting to the Console Port....................................................................................................................................................................... 18
4.9 Wiring Map for Serial Cable.............................................................................................................................................................................. 18
4.10 Operation of Web-based Management ......................................................................................................................................................... 19
5. MAKING NETWORK CONNECTIONS.................................................................................................................................................... 20
5.1 Connecting Network Devices........................................................................................................................................................................... 20
5.2 Twisted-Pair Connections ................................................................................................................................................................................ 20
5.3 Cabling Guidelines ............................................................................................................................................................................................ 20
5.4 Connecting to PCs, Servers, Hubs, and Switches.......................................................................................................................................... 20
5.5 Network Wiring Connections ........................................................................................................................................................................... 21
5.6 Fiber Optic SFP Devices ................................................................................................................................................................................... 22
5.7 Connectivity Rules............................................................................................................................................................................................. 22
5.8 1000BASE-T Cable Requirements ................................................................................................................................................................... 22
5.9 1000- Mbps Gigabit Ethernet Collision Domain ............................................................................................................................................. 22
5.10 100-Mbps Fast Ethernet Collision Domain ................................................................................................................................................... 23

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TABLE OF CONTENTS
6. CABLE LABELING AND CONNECTION RECORDS ............................................................................................................................... 24
7. TROUBLESHOOTING.............................................................................................................................................................................. 25
7.1 Basic Troubleshooting Tips .............................................................................................................................................................................. 25
7.2 Troubleshooting Chart ...................................................................................................................................................................................... 25
8. POWER AND COOLING PROBLEMS...................................................................................................................................................... 26
8.1 Installation ......................................................................................................................................................................................................... 26
8.2 In-Band Access ................................................................................................................................................................................................. 26
9. CABLES.................................................................................................................................................................................................... 27
9.1 Twisted-Pair Cable and Pin Assignments ....................................................................................................................................................... 27
9.2 10BASE-T/100BASE-TX Pin Assignments ...................................................................................................................................................... 27
9.3 Straight-Through Wiring ................................................................................................................................................................................... 28
9.4 Crossover Wiring ............................................................................................................................................................................................... 28
9.5 1000BASE-T Pin Assignments ......................................................................................................................................................................... 29
9.6 Cable Testing for Existing Category 5 Cable .................................................................................................................................................. 29
9.7 Adjusting Existing Category 5 Cabling to Run 1000BASE-T.......................................................................................................................... 29
9.8 Fiber Standards ................................................................................................................................................................................................. 30
10. COMPLIANCES AND STANDARDS ..................................................................................................................................................... 31
10.1 Compliances .................................................................................................................................................................................................... 31
10.1.1 FCC RFI Statement .....................................................................................................................................................................................................31
10.1.2 CE Mark Declaration of Conformance for EMI and Safety (EEC)......................................................................................................................31
10.2 Standards......................................................................................................................................................................................................... 31

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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.
NOTE: The switch is for indoor use only.
Self-demolition of the switch is strictly prohibited. Damage caused by self-demolition will void the warranty.
Do not place the switch outdoors or in a 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 cords and cables to completely remove power from the unit.
Before importing / exporting configuration, please make sure the firmware version is always the same.
After firmware upgrade, the switch will replace the configuration automatically with the latest firmware version.

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RE L ATE D PU B LI CATIO NS
RELATED PUBLICATIONS
The User’s Manual and the Management Guide give specific information on how to operate and use the management functions of
the switch:
To download from the Web site:
1. Go to www.blackbox.com
2. Enter the part number (LGB1110A, LGB1126A-R2, or LGB1152A) in the search box.
3. Click on the product in the “Product Results” page.
4. Click on the “Support” tab on the product page,
and select the document you wish to download.
If you have any trouble accessing the Black Box site to download the manual, you can contact our Technical Support
at 877-877-2269 or [e-mail].

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REVISION HISTORY
REVISION HISTORY
Release Number: 6.38
Date: 10/19/2015
Revision: A1

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CHAPTER 1: SPECIFICATIONS
TABLE 1-1. SPECIFICATIONS
SWITCH PART NUMBER LGB1110A LGB1126A- R2 LG B1152A
CONNECTORS
Total Ports 10 26 52
RJ-45 (10M/100M/1G) 824 48
Uplinks (100M/1G) (2) RJ-45/SFP combo (2) RJ-45/SFP combo (4) SFP
Console (1) RJ-45 (1) RJ-45 (1) RJ-45
HARDWARE PERFORMANCE
Forwarding Capacity 14.88 Mpps 38.68 Mpps 77.3 8 Mpps
Switching Capacity 20 Gbps 52 Gbps 104 Gbps
Mac Table 8K 8K 32K
Jumbo Frames 9216 Bytes 9216 Bytes 14000 Bytes
ENVIRONMENTAL
Operating Temperature 32 to 104° F (0 to 40 °C) 32 to 104° F (0 to 40 °C) 32 to 104° F (0 to 40 °C)
Storage Temperature -4 to +158 F ( -20 to +70° C) -4 to +158 F ( -20 to +70° C) -4 to +158 F ( -20 to +70° C)
Altitude <1000 ft. (<3000 m) <1000 ft. (<3000 m) <1000 ft. (<3000 m)
Operating Humidity 10 to 90%, noncondensing 10 to 90%, noncondensing 10 to 90%, noncondensing
MECHANICAL
Dimensions 1.5"H x 8.7"W x 5.28"D
(3.81 x 22.1 x 13.4 cm)
1.73"H x 17.4"W x 8.3"D
(4.4 x 44.2 x 21.1 cm)
1.73"H x 17.4"W x 11.8"D
(4.4 x 44.2 x 30 cm)
Weight 3.1 lb. (1.4 kg) 5.5 lb. (2.5 kg) 9.0 lb. (4.1 kg)
POWER
Voltage 100–240 VAC 100–240 VAC 100–240 VAC
Frequency 50–60 Hz 50–60 Hz 50–60 Hz
APPROVALS
Certification CE, FCC Part 15 Class A CE, FCC Part 15 Class A CE, FCC Part 15 Class A

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CHAPTER 1: SPECIFICATIONS
TABLE 1-2. SOFTWARE FEATURES
LAYER 2 SWITCHING
Spanning Tree Protocol (STP) • Standard Spanning Tree 802.1d
• Rapid Spanning Tree (RSTP) 802.1w
• Multiple Spanning Tree (MSTP) 802.1s
Trunking Link Aggregation Control Protocol (LACP) IEEE 802.3ad
• Up to 5 groups (LGB1110A), 13 groups (LGB116A-R2), or 26 groups (LGB1152A)
• Up to 2 ports (LGB1110A), 4 ports (LGB1126A-R2), or 8 ports (LGB1152A) per group
VLAN Supports up to 4K VLANs simultaneously (out of 4096 VLAN IDs)
• Port-based VLANs
• 802.1Q tag-based VLAN
• MAC-based VLAN
• Management VLAN
• Private VLAN Edge (PVE)
• Q-in-Q (double tag) VLAN
• Voice VLAN
• GARP VLAN Registration Protocol (GVRP)
DHCP Relay • Relay of DHCP traffic to DHCP server in different VLAN.
• Works with DHCP Option 82
IGMP v1/v2/v3 Snooping IGMP limits bandwidth-intensive multicast traffic to only the requesters. Supports 1024 multicast groups
IGMP Querier IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router
IGMP Proxy IGMP snooping with proxy reporting or report suppression actively filters IGMP packets in order to reduce load on the multi-
cast router
MLD v1/v2 Snooping Delivers IPv6 multicast packets only to the required receivers
DEVICE MANAGEMENT SYSTEM (DMS)
Graphical Monitoring • Topology view: Support intuitive way to configure and manage switches and devices with visual relations
• Floor view: It’s easy to drag and drop PoE devices and help you to build smart workforces
• Map view: Enhance efficiency to drag and drop devices and monitor surroundings on google map
Find my Switch Search your real switches quickly and manage directly.
Traffic Monitoring Display visual chart of network traffic of all devices and monitor every port at any time from switches
Troubleshooting • Network diagnostic between master switch and devices
• Support protection mechanism, such as rate-limiting to protect your devices from brute-force downloading
LAYER 3 SWITCHING
IPv4 Static Routing IPv4 Unicast: Static routing
IPv6 Static Routing IPv6 Unicast: Static routing

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CHAPTER 1: SPECIFICATIONS
TABLE 1-2 (CONTINUED). SOFTWARE FEATURES
SECURITY
Secure Shell (SSH) SSH secures Telnet traffic in or out of the switch, SSH v1 and v2 are supported
Secure Sockets Layer (SSL) SSL encrypts the http traffic, allowing advanced secure access to the browser-based management GUI in the switch
IEEE 802.1X • IEEE 802.1X: RADIUS authentication, authorization and accounting, MD5 hash, guest VLAN, single/multiple host
mode and single/multiple sessions
• Supports IGMP-RADIUS based 802.1X
• Dynamic VLAN assignment
Layer 2 Isolation Private VLAN Edge PVE (also known as protected ports) provides L2 isolation between clients in the same VLAN. Supports multiple uplinks
Port Security Locks MAC addresses to ports, and limits the number of learned MAC address
IP Source Guard Prevents illegal IP address from accessing to specific port in the switch
RADIUS/ TACACS+ Supports RADIUS and TACACS+ authentication. Switch as a client
Storm Control Prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast storm on a port
DHCP Snooping A feature acts as a firewall between untrusted hosts and trusted DHCP servers
ACLs Supports up to 256 entries. Drop or rate limitation based on:
• Source and destination MAC, VLAN ID or IP address, protocol, port,
• Differentiated services code point (DSCP) / IP precedence
• TCP/ UDP source and destination ports
• 802.1p priority
• Ethernet type
• Internet Control Message Protocol (ICMP) packets
• TCP flag
QUALITY OF SERVICE
Hardware Queue Supports 8 hardware queues
Scheduling • Strict priority and weighted round-robin (WRR)
• Queue assignment based on DSCP and class of service
Classification • Port based
• 802.1p VLAN priority based
• IPv4/IPv6 precedence / DSCP based
• Differentiated Services (DiffServ)
• Classification and re-marking ACLs
Rate Limiting • Ingress policer
• Egress shaping and rate control
• Per port

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CHAPTER 1: SPECIFICATIONS
TABLE 1-2 (CONTINUED). SOFTWARE FEATURES
MANAGEMENT
DHCP Server Support DHCP server to assign IP to DHCP clients
Zero Touch Upgrade Upgrade single switch automatically when you get notification
Remote Monitoring (RMON) Embedded RMON agent supports RMON groups 1,2,3,9 (history, statistics, alarms, and events) for enhanced traffic
management, monitoring and analysis
Port Mirroring Traffic on a port can be mirrored to another port for analysis with a network analyzer or RMON probe. Up to N-1 (N is
Switch’s Ports) ports can be mirrored to single destination port. A single session is supported.
UPnP The Universal Plug and Play Forum, an industry group of companies working to enable device-to-device
interoperability by promoting Universal Plug and Play
s-Flow The industry standard for monitoring high speed switched networks. It gives complete visibility into the use of networks
enabling performance optimization, accounting/billing for usage, and defense against security threats.
IEEE 802.1ab (LLDP) • Used by network devices for advertising their identities, capabilities, and neighbors on an IEEE 802ab local area
network
• Support LLDP-MED extensions
Web GUI Interface Built-in switch configuration utility for browser-based device configuration
CLI For users to configure/manage switches in command line modes
Dual Image Independent primary and secondary images for backup while upgrading
SNMP SNMP version1, 2c and 3 with support for traps, and SNMP version 3 user-based security model (USM)
Firmware Upgrade • Web browser upgrade (HTTP/ HTTPs) and TFTP
• Upgrade through console port as well
NTP Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over pack-
et-switched
Other Management • HTTP/HTTPs; SSH
• DHCP Client/ DHCPv6 Client
• Cable Diagnostics
• Ping
• Syslog
• Telnet Client
• IPv6 Management

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CHAPTER 2: OVERVIEW
2.1 DESCRIPTION
The Gigabit Managed Ethernet Switches are affordable managed switches that provide a reliable infrastructure for your business
network. These switches deliver the intelligent features you need to improve the availability of your critical business applications, protect
your sensitive information, and optimize your network bandwidth to deliver information and applications more effectively. Easy to set up
and use, the switches are ideal for entry- level networking, including small business or enterprise applications.
The Gigabit Managed Ethernet Switches have 10, 26, or 48 ports. The switches provide advanced security management capabilities and
network features that support data, voice, security, and wireless technologies.
Three Gigabit Managed Ethernet Switch models are available:
Gigabit Managed Ethernet Switch - 10-Ports (LGB1110A)
Gigabit Managed Ethernet Switch - 26-Ports (LGB1126A-R2)
Gigabit Managed Ethernet Switch - 52-Ports (LGB1152A)
2.2 SWITCH ARCHITECTURE
The switch transports multiple wire-speed 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.
2.3 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. It also has an RJ-45 console
port connector on the front panel for out-of-band management. You can connect a PC 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’s manual.

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CHAPTER 2: OVERVIEW
2.4 HARDWARE DESCRIPTION
2.4.1 1000BASE-T PORTS
The RJ-45 ports on the switch support automatic MDI/MDI-X operation, auto-negotiation, and IEEE 802.3x auto-negotiation of flow
control; it selects the optimum data rate and transmission automatically.
2.4.2 SFP TRANSCEIVER SLOTS
The Gigabit Managed Ethernet Switch supports Small Form Factor Pluggable (SFP) transceiver slots. In the default configuration, if an
SFP transceiver (purchased separately) is installed in a slot and has a valid link on the port, the associated RJ-45 port is disabled.
The following table shows a list of transceiver types that have been tested with the switch.
TABLE 2-1. SUPPORTED SFP TRANSCEIVERS
PART NUMBER DESCRIPTION
LFP411 SFP, 1250-Mbps Fiber with Extended Diagnostics, 850-nm Multimode, LC, 550 m
LFP412 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Multimode, LC, 2 km
LFP413 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Single-mode, LC, 10 km
LFP414 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, LC, 30 km
LFP418 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1550-nm Single-Mode, LC, 80 km
LFP420 SFP, Simplex, 1250-Mbps Fiber with Extended Diagnostics, 1550-nm TX, 1310-nm RX, Single-Mode, LC, 10 km
2.4.3 PORT AND SYSTEM STATUS LEDS
The Gigabit Managed Ethernet Switch switch includes 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. STATUS LEDS
LED CONDITION STATUS
Link/Act/Speed LED Green Lit green when all LEDS for each port are in Link/Act/Speed mode
Power LED Green Lit when switch is powering up;
OFF when switch power is turned off

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CHAPTER 3: NETWORK PLANNING
3.1 INTRODUCTION TO SWITCHING
A network switch allows simultaneous transmission of multiple packets; it can partition a network more efficiently than bridges or
routers.
When performance bottlenecks are caused by congestion at the network access point such as a file server, the device can be connected
directly to a switched port. Using full-duplex mode, the bandwidth of the dedicated segment can be doubled to maximize throughput.
When networks are based on repeater (hub) technology, the distance between end stations is limited by a maximum hop count. A switch
can subdivide the network into smaller and more manageable segments, and link them to the larger network so the hop count turns back
to zero and removes the limitation.
A switch can be easily configured in any Ethernet, Fast Ethernet, or Gigabit Ethernet network to significantly increase bandwidth while
using conventional cabling and network cards.
3.2 APPLICATION EXAMPLES
The Gigabit Managed Ethernet Switch has 8, 24, or 48 Gigabit Ethernet TP ports with auto MDI-X. The LGB1110A and LGB1126A-R2 each
have (2) dual-media ports, each consisting of (1) RJ-45 (100/1000 Mbps) and (1) SFP slot for a removable SFP module. The LGB1152A
has (4) SFP (100/1000) slots.
The switch is suitable for the following applications.
Remote site for Enterprise or SMB
Peer-to-peer for two remote offices
Office network
High-performance environment
Advanced security for network safety
Data/voice and video conferencing

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CHAPTER 4. INSTALLING THE SWITCH
4.1 SELECTING A SITE
The switch can be mounted in a standard 19-inch equipment rack (via an optional rackmount kit) or on a flat surface. 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 0 to 45°C (32 to 113 °F) 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 Gigabit Managed Ethernet Switch is connected to a separate grounded power outlet that provides 100 to 240 VAC,
50 to 60 Hz.
4.2 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: Use 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.
4.3 EQUIPMENT CHECKLIST
After unpacking this switch, please check the contents to be sure you have received all the components. Then, before beginning the
installation, be sure you have all other necessary installation equipment.
4.4 PACKAGE CONTENTS
Gigabit Managed Ethernet Switch
Four adhesive rubber feet
Mounting kit (for 19” Rack Shelf, Optional)
This Installation Guide
AC power cord
RJ-45 console cable
WARNING: The SFP ports are Class 1 laser devices. Avoid direct eye exposure to the beam coming from the transmit port.

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CHAPTER 4. INSTALLING THE SWITCH
4.5 MOUNTING
The switch can be mounted in a standard 19-inch equipment rack or on a desktop or shelf. Mounting instructions for each type of
site as follows.
4.5.1 RACKMOUNTING
Before rack mounting the switch, please pay attention to the following factors:
Temperature: Since the temperature within a rack assembly may be higher than the ambient room temperature, check that the rack
environment temperature is within the specified operating temperature range 32 to 104*F (0 to 45 °C).
Mechanical Loading: Do not place any equipment on top of a rackmounted unit.
Circuit Overloading: Be sure that the supply circuit to the rack assembly is not overloaded.
Grounding: Rackmounted equipment should be properly grounded.
To rackmount devices:
STEP 1: Attach the brackets to the device using the screws provided in the mounting kit.
FIGURE 4-1. ATTACHING THE BRACKETS.

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CHAPTER 4. INSTALLING THE SWITCH
STEP 2: Mount the device in the rack (via the optional rackmount kit), using four rackmounting screws (not provided). Be sure to
secure the lower rackmounting screws first to prevent the brackets from bending caused by the weight of the switch.
FIGURE 4-2. INSTALLING THE SWITCH IN A RACK
STEP 3: If you are installing a single switch only, turn to “Connecting to a Power Source at the end of this chapter.
STEP 4: If you are installing multiple switches, mount them in the rack, one below the other, in any order.
4.5.2 DESKTOP OR SHELF MOUNTING
STEP 1: Attach the four adhesive rubber feet to the bottom of the first switch.
STEP 2: Set the device on a flat surface near an AC power source, making sure there are at least two inches of space on all sides for
proper air flow.
STEP 3: If you are installing a single switch only, go to “Connecting to a Power Source” at the end of this chapter.
STEP 4: If you are installing multiple switches, attach four adhesive feet to each one. Place each device squarely on top of the one
below, in any order.

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CHAPTER 4. INSTALLING THE SWITCH
4.6 INSTALLING AN OPTIONAL SFP TRANSCEIVER
You can install or remove an SFP transceiver from an SFP transceiver slot slot without powering off the switch.
NOTES:
On the LGB1110A and LGB1126A-R2, the SFP slots are shared with the two 10/100/1000BASE-T RJ-45 ports. If an SFP is installed
in a slot, the associated RJ-45 port is disabled and cannot be used.
The SFP ports operate only at full-duplex. Half-duplex operation is not supported.
Make sure network cable is NOT connected when you install or remove an SFP module.
CAUTION: Use only supported SFP modules with your switch.
NOTE: SFP transceivers are not included with the switch (you need to order them separately).
TABLE 4-1. SUPPORTED SFP TRANSCEIVERS
PART NUMBER DESCRIPTION
LFP411 SFP, 1250-Mbps Fiber with Extended Diagnostics, 850-nm Multimode, LC, 550 m
LFP412 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Multimode, LC, 2 km
LFP413 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Single-mode, LC, 10 km
LFP414 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, LC, 30 km
LFP418 SFP, 1250-Mbps Fiber with Extended Diagnostics, 1550-nm Single-Mode, LC, 80 km
LFP420 SFP, Simplex, 1250-Mbps Fiber with Extended Diagnostics, 1550-nm TX, 1310-nm RX, Single-Mode, LC, 10 km
TO INSTALL AN SFP TRANSCEIVER, FOLLOW THESE STEPS:
STEP 1: Consider network and cabling requirements to select an appropriate SFP transceiver type.
STEP 2: Insert the transceiver with the optical connector facing outward and the slot connector facing down. Note that SFP transceivers
are keyed so they can only be installed in one orientation.
STEP 3: Slide the SFP transceiver into the slot until it clicks into place.
NOTE: SFP transceivers are not included with the switch (you need to order them separately).
4.7 CONNECTING TO A POWER SOURCE
You can plug or remove the power cord from AC power socket to turn the switch power on and off.
STEP 1: Insert the power cable plug directly into the AC socket located on the back of the switch.
STEP 2: Plug the other end of the cable into a grounded, 3-Pin, AC power source.
STEP 3: Make sure the POWER LED on the switch is lit. If not, check that the power cable is correctly plugged in.
WARNING: For International use, you may need to change the AC line cord. You must use a line cord set that has been approved for the
socket type in your country.

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CHAPTER 4. INSTALLING THE SWITCH
4.8 CONNECTING TO THE CONSOLE PORT
The RJ-45 serial port on the switch’s front panel is used to connect to the switch for out-of-band console configuration. You can access
the command-line-driven configuration program from a terminal or a PC running a terminal emulation program. The pin assignments
used to connect to the serial port are provided in the following table.
2 TXD
3 RXD
5 GND
12345678
FIGURE 4-3. SERIAL PORT (RJ-45) PINOUT
4.9 WIRING MAP FOR SERIAL CABLE
TABLE 4-2. WIRING MAP FOR SERIAL CABLE
SWITCH’S 8-PIN SERIAL PORT NULL-MODEM PC’S 9-PIN DTE PORT
6 RXD (receive data) --------------------------------------------- 3 TXD (transmit data)
3 TXD (transmit data) --------------------------------------------- 2 RXD (RECEIVE DATA)
5 SGND (Signal ground) --------------------------------------------- 5 SGND (SIGNAL GROUND)
NOTE: No other pins are used.
Plug in the console port.
The serial port’s configuration requirements are as follows:
Default Baud rate—115,200 bps
Character Size—8 Characters
Parity—None
Stop bit—One
Data bits—8
Flow control—none

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CHAPTER 4. INSTALLING THE SWITCH
4.10 OPERATION OF WEB-BASED MANAGEMENT
The default values of the switch are listed below:
IP address: 192.168.1.1
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.254
Username: admin
Password: <blank>
To access the web management of the switch, enter the default IP address in the web browser and press enter.
Example: http://192.168.1.1
Once you enter the IP address into the web browser, you will be prompted to enter a username and password to access the web
management interface. Enter the default values:
Username: admin
Password: <blank>
For full configuration details of the switch, refer to the user’s manual.

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CHAPTER 5: MAKING NETWORK CONNECTIONS
5.1 CONNECTING NETWORK DEVICES
The switch is designed to be connected to 10, 100, or 1000 Mbps network cards in PCs and servers, as well as to other switches
and hubs. It may also be connected to remote devices using optional SFP transceivers.
5.2 TWISTED-PAIR DEVICES
Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors at both ends. Use Category 5, 5e, or 6 cables
for 1000BASE-T connections, Category 5 or better for 100BASE-TX connections.
5.3 CABLING GUIDELINES
The RJ-45 ports on the switch support automatic MDI/MDI-X pinout configuration, so you can use standard straight-through twisted-pair
cables to connect to any other network device (PCs, servers, switches, routers, or hubs).
CAUTION: Do not plug a phone jack connector into an RJ-45 port. This will damage the switch. Use only twisted-pair cables with RJ-45
connectors that conform to FCC standards.
5.4 CONNECTING TO PCS, SERVERS, HUBS, AND SWITCHES
STEP 1: Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector.
STEP 2: . If the device is a network card and the switch is in the wiring closet, attach the other end of the cable segment to a modular
wall outlet that is connected to the wiring closet. (See the section “Network Wiring Connections.”) Otherwise, attach the other end to an
available port on the switch.
Make sure each twisted pair cable does not exceed 100 meters (328 ft) in length.
NOTE: Avoid using flow control on a port connected to a hub unless it is actually required to solve a problem. Otherwise, backpressure
jamming signals may degrade overall performance for the segment attached to the hub.
STEP 3: As each connection is made, the Link LED (on the switch) corresponding to each port will light green (1000 Mbps) or amber
(100 Mbps) to indicate that the connection is valid.