Black Box LGB1001A User manual

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 2006. Black Box Corporation. All rights reserved.

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Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
CUSTOMER
SUPPORT
INFORMATION
MAY 2006
LGB1001A
LGB1002A
LGB1003A
8-, 16-, and 24-Port 1000BASE-TX L2
Managed Ethernet Switches

FCC AND IC RFI STATEMENTS/CE NOTICE/CAUTION
1
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used
properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio
communication. It has been tested and found to comply with the limits for a Class A computing device in
accordance with the specifications in Subpart B of Part 15 of FCC rules, which are designed to provide
reasonable protection against such interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause interference, in which
case the user at his own expense will be required to take whatever measures may be necessary to correct
the interference.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s
authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio
Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques
de la classe A prescrites dans le Règlement sur le brouillage radioélectrique publié par Industrie Canada.
EUROPEAN UNION DECLARATION OF CONFORMITY
This equipment complies with the requirements of the European EMC Directive 89/336/EEC.
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 switch, always:
• Touch your computer’s metal chassis to ground the static electrical charge before
you pick up the switch.
• Pick up the switch by holding it on the left and right edges only.

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
2
INSTRUCCIONES DE SEGURIDAD (Normas Oficiales Mexicanas Electrical Safety Statement)
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo, sótano
mojado o cerca de una alberca, etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de
operación. Todo otro servicio deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del aparato
eléctrico sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se debe colocar en
libreros o gabinetes que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas
u otros aparatos (incluyendo amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de
operación, o como se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos
colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de
ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

TRADEMARKS USED IN THIS MANUAL
3
TRADEMARKS USED IN THIS MANUAL
ST is a registered trademark of AT&T.
BLACK BOX and the Double Diamond logo are registered trademarks of BB Technologies, Inc.
VT100 is a trademark of Digital Equipment Corporation.
DB2 and IBM are registered trademarks of International Business Machines Corporation.
Linux is a registered trademark of Linus Torvalds.
Internet Explorer, Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.
Netscape is a registered trademark of Netscape Communications Corporation.
Telnet is a trademark of Telnet Communications, Inc.
UNIX is a registered trademark of UNIX System Laboratories, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
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Contents
Chapter Page
1. Specifications ......................................................................................................................................................7
1.1 Hardware...................................................................................................................................................7
1.2 Management Software .............................................................................................................................8
1.3 Null-Modem Cable ...................................................................................................................................9
2. Overview............................................................................................................................................................10
2.1 Introduction ...........................................................................................................................................10
2.2 What’s Included......................................................................................................................................11
2.3 Hardware Description............................................................................................................................12
2.3.1 8-Port Version............................................................................................................................12
2.3.2 16-Port Version..........................................................................................................................14
2.3.3 24-Port Version..........................................................................................................................16
2.4 Optional SFP Fiber Transceiver Modules.............................................................................................18
3. Installation ........................................................................................................................................................19
3.1 Installation Instructions.........................................................................................................................19
3.2 Installing the Chassis in a 19-Inch Wiring Closet Rail .........................................................................20
3.3 Cabling Requirements ...........................................................................................................................21
3.3.1 Twisted-Pair Ports......................................................................................................................21
3.3.2 Fiber Transceiver Ports.............................................................................................................21
3.3.3 Switch Cascading ......................................................................................................................21
3.4 Configuring the Management Agent....................................................................................................25
3.4.1 Via the Serial RS-232 Console Port..........................................................................................26
3.4.2 Via the Ethernet Port................................................................................................................28
3.5 IP Address Assignment...........................................................................................................................29
3.5.1 IP Address..................................................................................................................................29
3.5.2 Subnet Mask..............................................................................................................................30
3.5.3 Default Gateway ........................................................................................................................31
3.5.4 DNS............................................................................................................................................31
3.6 Typical Applications ...............................................................................................................................31
3.6.1 Remote Site/Central Site Connection....................................................................................32
3.6.2 Peer-to-Peer Network Connection...........................................................................................33
3.6.3 Office Network Connection.....................................................................................................33
4. Web-Based Management..................................................................................................................................34
4.1 Home Overview......................................................................................................................................35
4.2 System ....................................................................................................................................................35
4.2.1 System Information ..................................................................................................................35
4.2.2 IP Configuration .......................................................................................................................37
4.2.3 Time Configuration..................................................................................................................38
4.2.4 Account Configuration.............................................................................................................40
4.2.5 Management Policy ..................................................................................................................41
4.2.6 Virtual Stack ..............................................................................................................................42
4.3 Port Configuration.................................................................................................................................43

CONTENTS
5
Chapter Page
4.3.1 Status..........................................................................................................................................43
4.3.2 Configuration............................................................................................................................46
4.3.3 Simple Counter.........................................................................................................................47
4.3.4 Detail Counter ..........................................................................................................................48
4.4 Mirror......................................................................................................................................................50
4.5 Bandwidth Management........................................................................................................................51
4.6 Quality of Service (QoS) Configuration...............................................................................................52
4.6.1 Per Port Priority ........................................................................................................................53
4.6.2 VLAN Tag Priority.....................................................................................................................53
4.6.3 IP ToS Classification .................................................................................................................54
4.6.4 IP TCP/UDP Port Classification..............................................................................................55
4.6.5 IP DiffServ Classification ..........................................................................................................57
4.7 SNMP Configuration..............................................................................................................................57
4.8 IGMP Snooping......................................................................................................................................59
4.9 Maximum Packet Length ......................................................................................................................60
4.10 DHCP Boot .............................................................................................................................................61
4.11 VLAN.......................................................................................................................................................61
4.11.1 VLAN Mode ..............................................................................................................................62
4.11.2 Tag-Based Group.......................................................................................................................63
4.11.3 Port-Based Group .....................................................................................................................64
4.11.4 Tag Rule.....................................................................................................................................65
4.12 MAC Table ..............................................................................................................................................67
4.12.1 MAC Table Information ...........................................................................................................67
4.12.2 MAC Table Maintenance..........................................................................................................68
4.12.3 Static Forward ...........................................................................................................................68
4.12.4 Static Filter ................................................................................................................................69
4.12.5 MAC Alias ..................................................................................................................................69
4.13 GVRP Configuration..............................................................................................................................70
4.13.1 GVRP Config.............................................................................................................................71
4.13.2 GVRP Counter ..........................................................................................................................72
4.13.3 GVRP Group Information........................................................................................................73
4.14 STP Configuration .................................................................................................................................74
4.14.1 STP Status..................................................................................................................................74
4.14.2 STP Configuration....................................................................................................................75
4.14.3 STP Port Configuration............................................................................................................77
4.15 Trunking Configuration ........................................................................................................................79
4.15.1 Port Setting/Status ...................................................................................................................80
4.15.2 Aggregator View........................................................................................................................81
4.15.3 LACP System Priority................................................................................................................82
4.16 802.1x Configuration ............................................................................................................................82
4.16.1 802.1x State Setting ..................................................................................................................85
4.16.2 802.1x Mode Setting.................................................................................................................85
4.16.3 Port Security Management.......................................................................................................86
4.16.4 Parameter Setting .....................................................................................................................86
4.17 Alarm Configuration..............................................................................................................................88
4.17.1 Events Configuration................................................................................................................88
4.17.2 Email/SMS Configuration .......................................................................................................89

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
6
Contents (continued)
Chapter Page
4.18 Configuration .........................................................................................................................................90
4.18.1 Save/Restore .............................................................................................................................90
4.18.2 Config File.................................................................................................................................91
4.19 Diagnostics..............................................................................................................................................91
4.19.1 Diag............................................................................................................................................91
4.19.2 Loopback Test ...........................................................................................................................92
4.19.3 Ping Test ....................................................................................................................................92
4.20 TFTP Server............................................................................................................................................92
4.21 Log...........................................................................................................................................................93
4.22 Firmware Upgrade .................................................................................................................................93
4.23 Reboot ....................................................................................................................................................94
4.24 Logout ....................................................................................................................................................94
5. CLI Management..............................................................................................................................................95
5.1 Login .......................................................................................................................................................95
5.2 Commands..............................................................................................................................................95
5.2.1 Global CLI Commands.............................................................................................................96
5.2.2 Local CLI Commands ............................................................................................................101
6. Troubleshooting .............................................................................................................................................177
6.1 Resolving a No Link Condition...........................................................................................................177
6.2 Problems/Solutions .............................................................................................................................177
6.3 Calling Black Box .................................................................................................................................178
6.4 Shipping and Packaging ......................................................................................................................178

CHAPTER 1: Specifications
7
1. Specifications
1.1 Hardware
Standards: IEEE 802.3, 802.3ab, 802.3z, 802.3u, 802.1v protocol-based VLAN classification, 802.3x port-based
network access control, 802.1q tag-based VLAN, 802.1d Spanning Tree Protocol, 802.1w Rapid Spanning Tree
Protocol, 802.1p Class of Service with 2-level priority queuing, 802.1ad port trunking with flexible load
distribution and failover function
Compatible Fiber Transceiver Modules: Ports 7 and 8, or 15 and 16 or 23 and 24 are TP/SFP fiber dual-media
ports with autodetection function; Optional SFP module (LGB200C-MLC, LGB200C-SLC10, LGB200C-SLC30,
LGB204C, LGB205C) supports LC or BiDi LC transceiver
Network Interface: 10/100/1000-Mbps Gigabit twisted-pair (ports 1–8 for LGB1001A, ports 1–16 for
LGB1002A, or ports 1–24 for LGB1003A), or 1000BASE-LX duplex multimode, duplex single-mode, or single-
strand single-mode LC or WDM (BiDi LC) (ports 7–8 for LGB1001A, 15–16 for LGB1002A, or 23–24 for
LGB1003A)
Transmission Mode: 10-/100-Mbps support for full or half-duplex; 1000-Mbps support for full duplex only
Speed: 10/100/1000 Mbps for twisted pair; 1000 Mbps for fiber
Forwarding/Filtering Packet Rate: 1,488,000 pps at 1000 Mbps; 148,800 pps at 100 Mbps; 14,880 pps at 10 Mbps
MAC Address and Self-Learning: 8K MAC address, 4K VLAN table entries
Buffer Memory: Embedded frame buffer: LGB1001A: 144 KB; LGB1002A: 272 KB; LGB1003A: 400 KB
Flow Control: IEEE 802.3x compliant for full duplex; Backpressure flow control for half-duplex
Cable Type and Maximum Length: Twisted-pair: CAT5 UTP cable, up to 328 feet (100 m) (ports 1–8 for
LGB1001A, ports 1–16 for LGB1002A, or ports 1–24 for LGB1003A);
Single-mode single-strand fiber, up to 12.4 miles (20 km): 1000BASE-LX single-strand single-mode WDM (BiDi)
SFP for LGB204C and LGB205C (slots 7 and 8 for LGB1001A, 15 and 16 for LGB1002A, or 23 and 24
for LGB1003A);
Multimode fiber, up to 1804.4 feet (550 m) for LGB200C-MLC;
Single-mode duplex fiber, up to 6.2 miles (10 km) for LGB200C-SLC10;
Single-mode duplex fiber up to 18.6 miles (30 km) for LGB200C-SLC30
User Controls: (1) Reset button
Connectors: LGB1001A: (8) RJ-45, (2) LC;
LGB1002A: (16) RJ-45, (2) slots for fiber media converter modules;
LGB1003A: (24) RJ-45, (2) slots for fiber media converter modules;
LGB200C-MLC, LGB200C-SLC10, LGB200C-SLC30: (2) LC;
LGB204C, LGB205C: (1) LC
Indicators: All: System LEDs: (1) Power, (1) CPU;
LGB1001A: (8) 10/100/1000 Mbps TP and (8) Link/Act for ports 1–8, (2) SFP (Link/Act) for ports 7–8;
LGB1002A: (16) 10/100/1000 Mbps TP and (16) Link/Act for ports 1–16, (2) SFP (Link/Act) for ports 15–16;
LGB1003A: (24) 10/100/1000 Mbps TP and (24) Link/Act for ports 1–24, (2) SFP (Link/Act) for ports 23–24

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
8
Temperature Tolerance: 32 to 104°F (0 to 40°C)
Humidity: 5 to 90%, noncondensing
Power: 100–240 VAC, 50–60 Hz, 13 W
Size: LGB1001A: 1.8"H x 8.5"W x 5.2"D (4.6 x 21.6 x 13.2 cm);
LGB1002A, LGB1003A: 1.8"H x 17.4"W x 8.2"D (4.6 x 44.2 x 20.8 cm)
1.2 Management Software
System Configuration: Autonegotiation support on 10/100/1000BASE-TX ports; Web browser or console
interface can set transmission speed (10/100/1000 Mbps) and operation mode (full/half-duplex) on each
port, enable/disable any port, set VLAN group, set trunk connection
Management Agent: SNMP support; MIB II, Bridge MIB, RMON MIB
Spanning Tree Algorithm: IEEE 802.1d
VLAN Function: Port-based/802.1q tagged allows up to 256 VLANs in one switch
Trunk Function: Port trunk connections allowed
IGMP: IP multicast filtering by passively snooping on the IGMP query
Bandwidth Control: Supports by-port Egress/Ingress rate control
Quality of Service (QoS): Referred to as Class of Service (CoS)by the IEEE 802.1p standard; classification of
packet priority can be based on either a VLAN tag on a packet or user-defined per-port QoS; Two queues per
port; IP ToS classification, TCP/UDP port classification, IP DiffServe classification
Port Security: Limited number of MAC addresses learned per port; static MAC addresses in the filtering table
stay in the filtering table
Internetworking Protocol: Bridging: 802.1d spanning tree; IP Multicast: IGMP snooping; Maximum of 256
active LANs and IP multicast sessions
Network Management: (1) RS-232 port as local control console, Telnet™ remote-control console; SNMP agent:
MIB-2 (RFC 1213), Bridge MIB (RFC 1493), RMON MIB (RFC 1757)-statistics; VLAN MIN (802.1q); Web
browser support based on HTTP server and CGI parser TFTP software-upgrade capability

CHAPTER 1: Specifications
9
1.3 Null-Modem Cable
Use the included DB9 cable to connect a terminal or terminal emulator to the managed switch’s RS-232 port to
access the command-line interface. Table 1-1 shows the pin assignments for the DB9 cable.
Table 1-1. Command-line interface DB9 connector pinout.
Function Pin
Carrier (CD) 1
Receive Data (RXD) 2
Transmit Data (TXD) 3
Data Terminal Ready (DTR) 4
Signal Ground (GND) 5
Data Set Ready (DSR) 6
Request To Send (RTS) 7
Clear To Send (CTS) 8
Table 1-2 shows the pinout for the null-modem cable.
Table 1-2. Null-modem cable pinout.
Signal Pin Pin Signal
CD 1 4 DTR
DSR 6 1 CD
DTR 4 6 DSR
RXD 2 3 TXD
TXD 3 2 RXD
GND 5 5 GND
RTS 7 8 CTS
CTS 8 7 RTS
Not used 9 9 Not used

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
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2. Overview
2.1 Introduction
The 8-, 16-, and 24-Port 1000BASE-TX L2 Managed Ethernet Switches (LGB1001A, LGB1002A, and
LGB1003A) are standard switches that meet all IEEE 802.3/u/x/z Gigabit and Fast Ethernet specifications.
Manage the switch via an async console directly connected to the switch’s RS-232 port, or through an Ethernet
port using CLI or SNMP.
This standalone off-the-shelf switch provides comprehensive hardware features. Each switch has (depending on
the model) 8, 16, or 24 RJ-45 twisted-pair ports and two STP fiber transceiver module slots (for STP fiber [LC or
BiDi LC] modules). The 1000-Mbps SFP fiber transceiver is used for high-speed connection expansion. These
ports autodetect whether the 10/100/1000-Mbps TP or the 1000-Mbps SFP fiber port is used. On the 8-port
switch, ports 7 and 8 can be twisted-pair or Ethernet. On the 16- and 24-port switches, these option ports are 15
and 16 or 23 and 24. Multimode or single-mode fiber transceiver modules plug into these two ports. (See
Section 2.4 for more information about the fiber transceiver modules.)
The LGB1001A has a 144 KB on-chip frame buffer, the LGB1002A features a 272 KB buffer, and the LGB1003A
uses a 400 KB buffer. All the switches feature jumbo frame support, programmable classifier for QoS (Layer
4/Multimedia), 8K MAC address and 4K VLAN support (IEEE 802.1a), per-port shaping, policing, and
Broadcast Storm Control, IEEE 802.1q-in-q nested VLAN support, full-duplex flow control (IEEE 802.3x) and
half-duplex backpressure, and extensive front-panel diagnostic LEDs.
Software features include port status and configuration, per-port traffic monitoring counters, system
information snapshot upon login, port mirroring, static trunk, and 802.1q VLAN. The switch also supports user
management and limits three users to login to enhance security. The maximum packet length can be up to
9208 bytes for a jumbo frame application. More features include DHCP broadcasting suppression to avoid a
suspended or crashed network, sending trap event for monitored events, default configuration that can be
restored to overwrite the current configuration working on either a Web browser or CLI, online plug/unplug
SFP modules, port mirror function with Ingress traffic, rapid spanning tree (802.1w RSTP), 802.1x port security
on a VLAN, user management, and only the first login administrator can configure the device.
With the SNMP agent, the network administrator can log in to the switch to monitor, configure, and control
each port’s activity. The overall network management is enhanced and the network efficiency is also improved
to accommodate high-bandwidth applications. In addition, the switch features comprehensive and useful
functions such as QoS (Quality of Service), Spanning Tree, VLAN, Port Trunking, Bandwidth Control, Port
Security, SNMP/RMON, and IGMP Snooping capability via the intelligent software. These functions are
described below and on the next page. The switch is suitable for both metro-LAN and office applications.
• QoS complies with the IEEE 802.1p standard. There are two priority queue and packet transmission
schedules.
• Spanning Tree complies with IEEE 802.1d and IEEE 802.1w (RSTP: Rapid Spanning Tree Protocol)
standards.
• The switch also supports port-based VLAN and IEEE 802.1a tag VLAN, with 256 active VLANs and VLAN
IDs from 1–4094. It also handles static port trunking and IEEE 802.3ad LACP port trunking.
• Supports Ingress and Egress per port bandwidth control.

CHAPTER 2: Overview
11
• Port Security: Support allowed, denied forwarding, and port security with MAC address.
• SNMP/RMON: SNMP agent and RMON MIB. In the device, the SNMP agent is client software that’s
operating over the SNMP protocol used to receive the command from an SNMP manager (server site) and
echo the corresponding data (MIB object). The SNMP agent actively issues TRAP information.
• RMON is the abbreviation for Remote Network Monitoring and is a branch of the SNMP MIB.
• The device supports MIB-2 (RFC 1213), Bridge MIB (RFC 1493), RMON MIB (RFC 1757)-statistics Group
1, 2, 3, and 9, Ethernet-like MIB (RFC 1643), and Ethernet MIB (RFC 1643).
• IGMP Snooping: Supports IGMP version 2 (RFC 2236): IGMP snooping establishes the multicast groups
that forward multicast packets to the member ports. This avoids wasting the bandwidth while IP multicast
packets are running over the network.
2.2 What’s Included
Your package should contain the following items. If anything is missing or damaged, please contact Black Box
at 724-746-5500.
• 8-, 16-, or 24-Port 1000BASE-TX L2 Managed Ethernet Switch
• CD-ROM containing this user’s manual in PDF format
• A printed Quick Start Guide
• AC power cord
• DB9 female to DB9 female RS-232 cable
• Rackmount kit (16- and 24-port switches only)
• (4) rubber feet

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
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2.3 Hardware Description
2.3.1 8-PORT VERSION
Figure 2-1 shows the 8-port switch. The numbered components in the figure are described in Table 2-1.
Figure 2-1. The 8-port switch’s front panel.
Table 2-1. The 8-port switch’s front-panel components.
Component Description
① Power LED Lights when power is on.
②SFP Link/Act LEDs SFP7 and SFP8 fiber port status LEDs.
Lights when connection to the remote device is good.
Blinks when any traffic is present.
Off when the module connection isn’t good.
③ CPU LED Blinks when there is activity on the CPU.
④TP Link/ACT LEDs There are eight TP Link/ACT LEDs. Each lights when the twisted-pair
connection to the remote device is good.
Blinks when any traffic is present.
Off when the cable connection isn’t good.
⑤ Gigabit Ethernet ports Eight 10/100/1000-Mbps autosensing ports.
④
⑤
⑥
①
②
⑦
⑧
③

CHAPTER 2: Overview
13
Table 2-1 (continued). The 8-port switch’s front-panel components.
Component Description
⑥ 10/100/1000 TP LEDs There are eight LEDs. Each lights green when 1000-Mbps speed is active.
Lights amber when 100-Mbps speed is active.
Off when 10-Mbps speed is active.
⑦ SFP Fiber Ports SFP fiber port module slots.
⑧ Reset button Resets the management system.
The 8-port switch’s rear panel is shown in Figure 2-2. The numbered components in the figure are described in
Table 2-2.
Figure 2-2. 8-port switch’s rear panel.
Table 2-2. The 8-port switch’s rear panel components.
Component Description
⑨ DB9 connector RS-232 serial console port for configuration or management.
⑩ Power connector Connects to a 100–240-VAC, 50/60-Hz AC power line.
⑩
⑨

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
14
2.3.2 16-PORT VERSION
Figure 2-3 shows the 16-port switch. The numbered components in the figure are described in Table 2-3.
Figure 2-3. The 16-port switch’s front panel.
Table 2-3. The 16-port switch’s front-panel components.
Component Description
① CPU LED Blinks when there is activity on the CPU.
②TP Link/ACT LEDs There are 16 TP Link/ACT LEDs. Each lights when the twisted-pair
connection to the remote device is good.
Blinks when any traffic is present.
Off when the cable connection is not good.
③SFP Link/Act LEDs SFP15 and SFP16, fiber port status LEDs.
Lights when connection to the remote device is good.
Blinks when any traffic is present.
Off when the module connection is not good
④ Power LED Lights when power is on.
⑤ 10/100/1000 TP LEDs There are 16 LEDs. Each lights green when 1000-Mbps speed is active.
Lights amber when 100-Mbps speed is active.
Off when 10-Mbps speed is active.
⑥ Gigabit Ethernet ports 16 10/100/1000-Mbps autosensing ports.
①②③
⑧
⑤
⑥
⑥
⑦
④

CHAPTER 2: Overview
15
Table 2-3 (continued). The 16-port switch’s front-panel components.
Component Description
⑦ SFP Fiber Ports SFP fiber port module slots.
⑧ Reset button Resets the management system.
The 16-port switch’s rear panel is shown in Figure 2-4. The numbered components in the figure are described
in Table 2-4.
Figure 2-4. 16-port switch’s rear panel.
Table 2-4. The 16-port switch’s rear panel components.
Component Description
⑨ DB9 connector RS-232 serial console port for configuration or management.
⑩ Power connector Connects to a 100–240-VAC, 50/60-Hz AC power line.
⑩
⑨

8-, 16-, AND 24-PORT 1000BASE-TX L2 MANAGED ETHERNET SWITCHES
16
2.3.3 24-PORT VERSION
Figure 2-5 shows the 24-port switch’s front panel. The numbered components in the figure are described in
Table 2-5.
Figure 2-5. The 24-port switch’s front panel.
Table 2-5. The 24-port switch’s front-panel components.
Component Description
① CPU LED Blinks when there is activity on the CPU.
②TP Link/ACT LEDs There are 24 TP Link/ACT LEDs. Each lights when the twisted-pair
connection to the remote device is good.
Blinks when any traffic is present.
Off when the cable connection is not good.
③SFP Link/Act LEDs SFP23 and SFP24 fiber port status LEDs.
Lights when connection to the remote device is good.
Blinks when any traffic is present.
Off when the module connection is not good
④ Power LED Lights when power is on.
①②③
⑧
⑤
⑥
⑥
⑦
④

CHAPTER 2: Overview
17
Table 2-5 (continued). The 24-port switch’s front-panel components.
Component Description
⑤ 10/100/1000 TP LEDs There are 24 LEDs. Each lights green when 1000-Mbps speed is active.
Lights amber when 100-Mbps speed is active.
Off when 10-Mbps speed is active.
⑥ Gigabit Ethernet ports 24 10/100/1000-Mbps autosensing ports.
Blinks when any traffic is present.
⑦ SFP Fiber Ports SFP fiber port module slots.
⑧ Reset button Resets the management system.
The 24-port switch’s rear panel is shown in Figure 2-6. The numbered components in the figure are described
in Table 2-6.
Figure 2-6. 24-port switch’s rear panel.
Table 2-6. The 24-port switch’s rear panel components.
Component Description
⑨ DB9 connector RS-232 serial console port for configuration or management.
⑩ Power connector Connects to a 100–240-VAC, 50/60-Hz AC power line.
⑩
⑨