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24 Port 10/100Mbps Switch
FMS-24K
Installation Guide
24-Port Fast Ethernet Switch
Intelligent Fast Ethernet Switch with 24 10BASE-T / 100BASE-TX (RJ-45) Ports, and 2 Slots for 100BASE-FX or Gigabit Uplink Modules
Compliances
FCC - Class A
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to Subpart B of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when 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 required to correct the interference. You are cautioned that changes or modifications not expressly approved by the party responsible for compliance could void your authority to operate the equipment.
You may use unshielded twisted-pair (UTP) for RJ-45 connections - Category 3 or greater for 10 Mbps connections, Category 5 for 100 Mbps connections, Category 5, 5e, or 6 for
1000 Mbps connections. For fiber optic connections, you may use 50/125 or 62.5/125 micron multimode fiber or 9/125 micron single-mode fiber.
Warnings: 1. Wear an anti-static wrist strap or take other suitable measures to prevent electrostatic discharge when handling this equipment.
2. When connecting this hub to a power outlet, connect the field ground lead on the tri-pole power plug to a valid earth ground line to prevent electrical hazards.
Industry Canada - Class A
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in the interference-causing equipment standard entitled
“Digital Apparatus,” ICES-003 of the Department of Communications.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils numériques de Classe A prescrites dans la norme sur le matériel brouilleur:
“Appareils Numériques,” NMB-003 édictée par le ministère des Communications.
Japan VCCI Class A
i
CE Mark Declaration of Conformance for EMI and Safety (EEC)
This information technology equipment complies with the requirements of the Council
Directive 89/336/EEC on the Approximation of the laws of the Member States relating to
Electromagnetic Compatibility and 73/23/EEC for electrical equipment used within certain voltage limits and the Amendment Directive 93/68/EEC. For the evaluation of the compliance with these Directives, the following standards were applied:
RFI Emission: • Limit class A according to EN 55022:1998
• Limit class A for harmonic current emission according to EN 61000-3-2/1995
Immunity:
• Limitation of voltage fluctuation and flicker in low-voltage supply system according to EN 61000-3-3/1995
• Product family standard according to EN 55024:1998
• Electrostatic Discharge according to EN 61000-4-2:1995
(Contact Discharge: ±4 kV, Air Discharge: ±8 kV)
• Radio-frequency electromagnetic field according to EN 61000-4-3:1996
(80 - 1000 MHz with 1 kHz AM 80% Modulation: 3 V/m)
LVD:
• Electrical fast transient/burst according to EN 61000-4-4:1995 (AC/DC power supply: ±1 kV, Data/Signal lines: ±0.5 kV)
• Surge immunity test according to EN 61000-4-5:1995
(AC/DC Line to Line: ±1 kV, AC/DC Line to Earth: ±2 kV)
• Immunity to conducted disturbances, Induced by radio-frequency fields:
EN 61000-4-6:1996 (0.15 - 80 MHz with 1 kHz AM 80% Modulation: 3 V/m)
• Power frequency magnetic field immunity test according to
EN 61000-4-8:1993
(1 A/m at frequency 50 Hz)
• Voltage dips, short interruptions and voltage variations immunity test according to EN 61000-4-11:1994 (>95% Reduction @10 ms, 30%
Reduction @500 ms, >95% Reduction @5000 ms)
• EN 60950 (A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)
Warning! Do not plug a phone jack connector in the RJ-45 port. This may damage this device. Les raccordeurs ne sont pas utilisé pour le système téléphonique!
Taiwan BSMI Class A
Australia AS/NZS 3548 (1995) - Class A
ACN 066 352 010 ii
Safety Compliance
Warning: Fiber Optic Port Safety
CLASS I
LASER DEVICE
When using a fiber optic port, never look at the transmit laser while it is powered on. Also, never look directly at the fiber TX port and fiber cable ends when they are powered on.
Avertissment: Ports pour fibres optiques - sécurité sur le plan optique
DISPOSITIF LASER
DE CLASSE I
Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais directement le port TX (Transmission) à fibres optiques et les embouts de câbles à fibres optiques tant qu'ils sont sous tension.
Warnhinweis: Faseroptikanschlüsse - Optische Sicherheit
LASERGER ÄT
DER KLASSE I
Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet ist. Niemals direkt auf den Faser-TX-Anschluß und auf die Faserkabelenden schauen, während diese eingeschaltet sind.
Underwriters Laboratories Compliance Statement
Important! Before making connections, make sure you have the correct cord set. Check it (read the label on the cable) against the following:
Operating Voltage
120 Volts
240 Volts (Europe only)
Cord Set Specifications
UL Listed/CSA Certified Cord Set
Minimum 18 AWG
Type SVT or SJT three conductor cord
Maximum length of 15 feet
Parallel blade, grounding type attachment plug rated 15A, 125V
Cord Set with H05VV-F cord having three conductors with minimum diameter of 0.75 mm 2
IEC-320 receptacle
Male plug rated 10A, 250V
The unit automatically matches the connected input voltage. Therefore, no additional adjustments are necessary when connecting it to any input voltage within the range marked on the rear panel.
Wichtige Sicherheitshinweise (Germany)
1. Bitte lesen Sie diese Hinweise sorgfältig durch.
2. Heben Sie diese Anleitung für den späteren Gebrauch auf.
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine
Flüssigoder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur iii
Reinigung.
4. Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.
5. Das Gerät ist vor Feuchtigkeit zu schützen.
6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen könnte Beschädigungen hervorrufen.
7. Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung schützt.
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
9. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch nichts auf der Leitung abgestellt werden.
10. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.
11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.
12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.
13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur von authorisiertem Servicepersonal geöffnet werden.
14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer qualifizierten Servicestelle zu überprüfen: a. Netzkabel oder Netzstecker sind beschädigt.
b. Flüssigkeit ist in das Gerät eingedrungen.
c. Das Gerät war Feuchtigkeit ausgesetzt.
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit
Hilfe dieser Anleitung keine Verbesserung erzielen.
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
15. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden. Für einen
Nennstrom bis 6A und einem Gerätegewicht größer 3kg ist eine Leitung nicht leichter als
H05VV-F, 3G, 0.75mm
2 einzusetzen.
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A) oder weniger.
iv
Contents
Contents
Chapter 1: About the Switch 1-1
Optional Media Extender Modules
Chapter 2: Network Planning
2-1
Chapter 3: Installing the Switch
Optional Rack-Mounting Equipment 3-2
3-1
Installing an Optional Module into the Switch
Connecting to the Stack’s Backplane
Chapter 4: Making Network Connections
4-1
v
Contents
Connecting to PCs, Servers, Hubs and Switches
Appendix A: Troubleshooting
A-1
Power and Cooling Problems A-1
Appendix B: Cables
Twisted-Pair Cable and Pin Assignments
10BASE-T/100BASE-TX Pin Assignments
B-1
1000BASE-T Pin Assignments B-3
1000BASE-T Cable Requirements B-5
Cable Testing for Existing Category 5 Cable
Adjusting Existing Category 5 Cabling
Console Port to 9-Pin DTE Port on PC
Console to 25-Pin DTE Port on PC
Appendix C: Specifications
C-1
Glossary
vi
Index
Contents vii
Contents viii
Chapter 1: About the Switch
Overview
This switch is an intelligent Fast Ethernet switch with 24 10BASE-T / 100BASE-TX
(RJ-45) Ports and 2 Slots for 100BASE-FX or Gigabit Uplink Modules. This switch can easily tame your network with full support for Spanning Tree Protocol, Multicast
Switching, Virtual LANs, and Layer 2/3/4 CoS services.
System Indicators
Port Status Indicators (1-24)
Media and Stacking Slots
Module 2 Module 1
10/100 Mbps RJ-45 Ports Module Status Indicators (25/26)
Console Port
100-240V~
50/60Hz, 2A
Power Socket
Figure 1-1. Front and Rear Panels
Switch Architecture
The FMS-24K employs a wire-speed, non-blocking switching fabric. This permits simultaneous wire-speed transport of multiple packets at low latency on all ports.
This switch also features full-duplex capability on all ports, which effectively doubles the bandwidth of each connection.
Auto-negotiation is used to select the optimal transmission speed and communication mode for each connection. With store-and-forward switching and flow control, maximum data integrity is always maintained, even under heavy loading.
This switch includes two slots on the front panel for slide-in 1000BASE-LX,
1000BASE-SX, 1000BASE-T, 100BASE-FX, or 1000BASE-X (GBIC) modules.
Cascade connections between switches can be made using these modules.
The switch also supports a stacking module that can be installed into slot Module 2.
The stacking module allows up to eight units to be linked together and managed from one unit using one IP address.
1-1
About the Switch
Management Options
This switch contains a comprehensive array of LEDs for “at-a-glance” monitoring of network and port status. It also includes a management agent that allows you to configure or monitor the switch using its embedded management software, or via
SNMP applications. To manage the switch, you can make a direct connection to the
RS-232 console port (out-of-band), or you can manage the switch through a network connection (in-band) using Telnet, the on-board Web agent, or Windows-based network management software.
The management agent provides a wide range of advanced performance-enhancing features. Port-based VLANs provide traffic security and efficient use of network bandwidth. QoS priority queueing ensures the minimum delay for moving real-time multimedia data through the switch. Flow control eliminates the loss of packets due to bottlenecks caused by port saturation. Port security is provided to filter unwanted traffic from the switch.
For a detailed description of the switch’s advanced features, refer to the
Management Guide.
Description of Hardware
RJ-45 Ports
The switch base unit contains 24 10BASE-T/100BASE-TX RJ-45 ports. All of these ports support automatic MDI/MDI-X operation, so you can use straight-through cables for all network connections to PCs or servers, or to other switches or hubs.
(See “10BASE-T/100BASE-TX Pin Assignments” on page B-2.)
Each of these ports support auto-negotiation, so the optimum transmission mode
(half or full duplex), and data rate (10 or 100 Mbps) can be selected automatically, if this feature is also supported by the attached device. If a device connected to one of these ports does not support auto-negotiation, the correct speed will be sensed by the port, but the transmission mode will default to half duplex.
Each port also supports auto-negotiation of flow control, so the switch can automatically prevent port buffers from becoming saturated.
1-2
Description of Hardware
Port Status LEDs
The base unit also includes a display panel for key system and port indications that simplify installation and network troubleshooting. The LEDs, which are located on the front panel for easy viewing, are shown below and described in the following tables.
Figure 1-2. Port Status LEDs
LED
Base Unit Ports
1~24
(Link/Activity)
Condition
Port Status LEDs
Status
On/Flashing Amber Port has established a valid 10 Mbps network connection.
Flashing indicates activity.
On/Flashing Green Port has established a valid 100 Mbps network connection.
Flashing indicates activity.
Off There is no valid link on the port.
Module Ports
25, 26
(Link/Activity)
On/Flashing Amber Port has established a valid 10/100 Mbps network connection. Flashing indicates activity.
On/Flashing Green Port has established a valid 1000 Mbps network connection. Flashing indicates activity.
Off There is no valid link on the port.
1-3
About the Switch
System Status LEDs
Module 1
Link PWR
Duplex Diag
M1 RPU
M2 Stack
LED
PWR
Diag
Link
Duplex
Stack
Figure 1-3. System Status LEDs
Condition
On Green
On Amber
Off
On Green
Flashing Green
On Amber
N/A
N/A
Flashing Amber
Green
Amber
Flashing Green
System Status LEDs
Status
The unit’s internal power supply is operating normally.
The unit’s internal power supply has failed.
The unit has no power connected.
The system diagnostic test has completed successfully.
The system diagnostic test is in progress.
The system diagnostic test has detected a fault.
This indicator is not currently implemented.
This indicator is not currently implemented.
An initial state of stacking configuration upon powering on.
This switch is acting as the master unit in the stack.
This switch is acting as a slave unit in the stack.
When the user enters the light unit command in the CLI, the unit ID of each switch in the stack will be displayed by port LEDs 1 to 8.
1-4
Description of Hardware
Optional Media Extender Modules
Optional 1000BASE-T Module
1000BASE-T RJ45 Module
Figure 1-4. Single-Port 1000BASE-T Module
Using Category 5, 5e, or 6 twisted-pair cable you can connect to another device up to 100 m (328 ft) away. The 1000BASE-T module operates at 10/100/1000 Mbps. At
1000 Mbps it operates at full duplex and supports auto-negotiation of speed and flow control. At 10/100 Mbps it supports auto-negotiation of speed, duplex mode
(i.e., half or full duplex), and flow control. Note that you should first test the cable
installation for IEEE 802.3ab compliance. See “1000BASE-T Cable Requirements” on page B-5.
Optional 1000BASE-SX Module
1000BASE-SX Multimode Module
TX RX
Figure 1-5. Single-Port 1000BASE-SX Gigabit Module
Using multimode fiber optic cable, the 1000BASE-SX port can be connected to a remote site up to 550 m (1805 ft) away. The 1000BASE-SX Gigabit module operates at 1 Gbps, with support for full-duplex mode and flow control.
Optional 1000BASE-LX Module
Figure 1-6. Single-Port 1000BASE-LX Gigabit Module
1-5
About the Switch
Using single-mode fiber optic cable, the 1000BASE-LX port can be connected to a remote site up to 5 km (16404 ft) away. The 1000BASE-LX Gigabit module operates at 1 Gbps, with support for full-duplex mode and flow control.
Optional 100BASE-FX Multimode Module
100BASE-FX Multimode Module
TX RX
Figure 1-7. Single-Port 100BASE-FX Multimode Module
Using multimode fiber optic cable, the 100BASE-FX port can be connected to a remote site up to 2 km (1.24 miles) away. The 100BASE-FX module is fixed to operate at 100 Mbps full duplex, and supports auto-negotiation for flow control. The module is fitted with an SC connector.
Optional 100BASE-FX Single-mode Module
100BASE-FX Singlemode Module
TX RX
Figure 1-8. Single-Port 100BASE-FX Single-mode Module
Using fiber optic cable, the 100BASE-FX port can be connected to a remote site up to 20 km (12.43 miles) away. The 100BASE-FX module is fixed to operate at
100 Mbps full duplex, and supports auto-negotiation for flow control. The module is fitted with an SC connector.
Optional 1000BASE-X GBIC Module
1000BASE-X GBIC Module
Figure 1-9. Single Port 1000BASE-X GBIC Module
1-6
Description of Hardware
This module supports 5 V 1000BASE-SX, 1000BASE-LX and 1000BASE-LH GBIC transceivers:
1000BASE-SX GBIC transceivers provide one short-wavelength (850 nm) Gigabit port that can be used for a high-speed backbone or server connection. This port can be connected to a site up to 220 m (722 ft) away with 62.5/125 micron multimode fiber cable, or up to 500 m (1641 ft) with 50/125 micron multimode fiber cable.
1000BASE-LX GBIC transceivers provide one long-wavelength (1300 nm) Gigabit port that can be used for a high-speed backbone or server connection. This port can be connected to a site up to 5 km (16404 ft) away with single-mode fiber cable.
1000BASE-LH GBIC transceivers provide one long-wavelength (1550 nm) Gigabit port that can be used for a long-haul connection to a remote location. This port can be connected to a site up to 70 km (43.5 miles) away with single-mode fiber cable.
Caution: Install only 5 V GBIC transceivers into the module slots.
Optional Stacking Module
Stacking Module
RX TX
Figure 1-10. Stacking Module
The module provides two 1 Gbps ports via USB Type-A connectors. The right port is a transmit port and the one on the left a receive port. The module allows up to eight switches to be linked together using stacking cables (ordered separately). The push button on the module enables one switch in the stack to be selected as the master.
Combo Module
1000BASE Combo Module
Figure 1-11. Combo Module
This combo module provides a Gigabit RJ-45 port with a shared Small Form Factor
Pluggable (SFP) transceiver slot. 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
1-7
About the Switch disabled.
To connect a device to an SFP port, do the following:
1. Use your cabling requirements to select an appropriate SFP transceiver type.
2. Insert the SFP transceiver (sold separately) into an SFP slot. The slot’s LED indicator turns on to confirm that it is correctly installed.
The 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation, so you can use straight-through cables for all network connections to PCs or servers, or to other
switches or hubs. (See “10BASE-T/100BASE-TX Pin Assignments” on page B-2.)
Power Supply Receptacle
The power receptacle is located on the rear panel of the switch. The standard power receptacle is for the AC power cord.
100-240V~
50/60Hz, 2A
Figure 1-12. Power Supply Receptacle
1-8
Features and Benefits
Features and Benefits
Connectivity
• 24 dual-speed ports for 10 or 100 Mbps Ethernet connections
• Auto-negotiation enables each RJ-45 port to automatically select the optimum communication mode (half or full duplex) for the attached device
• Independent RJ-45 ports with support for automatic MDI/MDI-X
• Unshielded (UTP) cable supported on all RJ-45 ports: Category 3, 4 or 5 for
10 Mbps connections and Category 5 for 100 Mbps connections
• IEEE 802.3 Ethernet and 802.3u Fast Ethernet compliance ensures compatibility with standards-based hubs, network cards and switches from any vendor
• Provides stacking capability via a module with 1 Gbps stacking bandwidth. Up to 8 units can be stacked.
Expandability
• Optional single-port 1000BASE-SX Gigabit module that can run up to 550 meters using 50/125 micron multimode fiber cable, and operates at 1 Gbps, full duplex, with auto-negotiation for flow control
• Optional single-port 1000BASE-LX Gigabit module that can run up to 5 km using
9/125 micron single-mode fiber cable, and operates at 1 Gbps, full duplex, with auto-negotiation for flow control
• Optional single-port 1000BASE-T Gigabit module that can run up to 100 meters using 100-ohm Category 5, 5e, or 6 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable, and operates at 1 Gbps, full duplex, with auto negotiation for flow control
• Optional single-port 100BASE-FX module that can run up to 20 km using 9/125 micron single-mode fiber cable and operates at 100 Mbps, full duplex, with auto-negotiation for flow control
• Optional single-port 100BASE-TX module that can run a connection up to 100 meters away using 100-ohm Category 5 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable, and operates at 10/100 Mbps, full/half duplex, with auto negotiation for speed, duplex mode, and flow control
• Optional 2-port 1000BASE-T module, with combined Small Form Factor Pluggable
(SFP) slot
• Optional 1000BASE-X GBIC module
Performance
• Transparent bridging
• Aggregate bandwidth up to 8.8 Gbps
• Switching Table with 8K MAC address entries
• Filtering and forwarding at line speed
1-9
About the Switch
• Desktop or rack-mountable
1-10
Features and Benefits
Management
• “At-a-glance” LEDs for easy troubleshooting
• Management agent:
• Supports Telnet, SNMP and Web-based interface
• Manages switch (or entire stack) in-band or out-of-band
• Spanning Tree Protocol
• Private VLAN function providing port-based security and isolation between ports
• VLAN support with up to 25 6 groups, port-based or with 802.1Q VLAN tagging, and GVRP for automatic VLAN learning
• Quality of Service (QoS) supports four levels of priority and Weighted Round
Robin
• Multicast Switching based on IGMP Snooping
• Port trunking supported for 2, 3 or 4-port groups
1-11
About the Switch
1-12
Chapter 2: Network Planning
Introduction to Switching
A network switch allows simultaneous transmission of multiple packets via non-crossbar switching. This means that it can partition a network more efficiently than bridges or routers. The switch has, therefore, been recognized as one of the most important building blocks for today’s networking technology.
When performance bottlenecks are caused by congestion at the network access point (such as the network card for a high-volume file server), the device experiencing congestion (server, power user or hub) can be attached directly to a switched port. And, by 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 maximum distance between end stations is limited. For Ethernet, there may be up to four hubs between any pair of stations; for Fast Ethernet, the maximum is two. This is known as the hop count. However, a switch turns the hop count back to zero. So subdividing the network into smaller and more manageable segments, and linking them to the larger network by means of a switch, removes this limitation.
A switch can be easily configured in any Ethernet or Fast Ethernet network to significantly boost bandwidth while using conventional cabling and network cards.
2-1
Network Planning
Application Examples
This switch is not only designed to segment your network, but also to provide a wide range of options in setting up network connections. Some typical applications are described below.
Collapsed Backbone
This switch is an excellent choice for mixed Ethernet and Fast Ethernet installations where significant growth is expected in the near future. You can easily build on this basic configuration, adding direct full-duplex connections to workstations or servers.
When the time comes for further expansion, just cascade the switch to an Ethernet or Fast Ethernet hub or switch.
Module 2 Module 1
...
Servers
200 Mbps
Full Duplex
...
Workstations
200 Mbps
Full Duplex
Figure 2-1. Collapsed Backbone
...
Workstations
20 Mbps
Full Duplex
2-2
Application Examples
Central Wiring Closet
With 26 parallel bridging ports (i.e., 26 distinct collision domains), this switch can collapse a complex network down into a single efficient bridged node, increasing overall bandwidth and throughput.
In the figure below, the 10BASE-T/100BASE-TX ports on the switch are providing
100 Mbps connectivity for up to 24 segments. In addition, the switch is also connecting servers at 100 Mbps.
Module 2 Module 1
...
10/100 Mbps Segments
...
Figure 2-2. Central Wiring Closet
Server Farm
2-3
Network Planning
Making VLAN Connections
VLANs can be based on port groups, or each data frame can be explicitly tagged to identify the VLAN group to which it belongs. When using port-based VLANs, ports can either be assigned to one specific group or to all groups. Port-based VLANs are suitable for small networks. A single switch can be easily configured to support several VLAN groups for various organizational entities (such as Finance and
Marketing).
When you expand port-based VLANs across several switches, you need to make a separate connection for each VLAN group. This approach is, however, inconsistent with the Spanning Tree Protocol, which can easily segregate ports that belong to the same VLAN. When VLANs cross separate switches, it is therefore better to use
VLAN tagging. This allows you to assign multiple VLAN groups to the “trunk” ports
(that is, tagged ports) connecting different switches.
R&D
VLAN 2
Testing
VLAN 1
Tagged
Ports
Finance
Untagged Ports
VLAN unaware switch
Marketing
Tagged Port
Module 2
Finance
VLAN 3
VLAN 4
VLAN 3
Figure 2-3. Making VLAN Connections
R&D
Module 1
VLAN 1
VLAN 2
VLAN aware switch
Testing
2-4
Connectivity Rules
Connectivity Rules
When adding hubs (repeaters) to your network, please follow the connectivity rules listed below for Ethernet, Fast Ethernet, or Gigabit Ethernet. However, note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices.
Fiber Size
62.5/125 micron
50/125 micron
Maximum Fiber Optic Cable Distance for 1000BASE-SX
Fiber Bandwidth
160 MHz/km
200 MHz/km
400 MHz/km
500 MHz/km
Maximum Cable Length
2-220 m (7-722 ft)
2-275 m (7-902 ft)
2-500 m (7-1641 ft)
2-550 m (7-1805 ft)
Fiber Size
9/125 micron
Maximum Fiber Optic Cable Distance for 1000BASE-LX
Fiber Bandwidth
N/A
Maximum Cable Length
2 m - 5 km (7 - 16404 ft)
Maximum Cable Distance for 1000BASE-T
Type Connector
Cat. 5, 5e, or 6 100-ohm UTP RJ-45
Maximum Cable Length
100 m (328 ft)
Type
10BASE-T
100BASE-TX
100BASE-FX
Multimode
100BASE-FX
Single-Mode
Maximum Cable Distance for 10/100BASE
Cable Type
Twisted Pair, Categories 3, 4, 5
Category 5 100-ohm UTP or STP
50/125 or 62.5/125 micron core multimode fiber
(MMF)
9/125 micron core single-mode fiber (SMF)
Maximum Cable Length
100 m (328 ft)
100 m (328 ft)
2 km (1.24 miles)
20 km (12.43 miles)
2-5
Network Planning
Application Notes
1.
Full-duplex operation only applies to point-to-point access (such as when a switch is attached to a workstation, server or another switch). When the switch is connected to a hub, both devices must operate in half-duplex mode.
2.
When a switch is connected to a hub or any kind of shared media, you may want to turn off back pressure flow control to prevent jamming packets from being propagated thoughout the hub.
3.
As a general rule the length of fiber optic cable for a single switched link should not exceed:
• 1000BASE-SX/LX: 550 m (1805 ft) for multimode fiber or 5 km (16404 ft) for single-mode fiber.
• 100BASE-FX: 2 km (1.24 miles) for multimode fiber or 20 km (2.43 miles) for single-mode fiber.
However, power budget constraints must also be considered when calculating the maximum cable length for your specific environment.
2-6
Chapter 3: Installing the Switch
Selecting a Site
Switch units can be mounted in a standard 19-inch equipment rack 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 0 to 50° C (32 to 122 °F) and its humidity within 10% to 90%, non-condensing
• provide adequate space (approximately two inches) on all sides for proper air flow
• be accessible for installing, cabling and maintaining the devices
• allow the status LEDs to be clearly visible
• Make sure twisted-pair cable is always routed away from power lines, fluorescent lighting fixtures and other sources of electrical interference, such as radios, transmitters, etc.
• Make sure that a separate grounded power outlet that provides 100 to 240 VAC,
50 to 60 Hz, is within 2.44 m (8 feet) of each device and is powered from an independent circuit breaker. As with any equipment, using a filter or surge suppressor is recommended.
Equipment Checklist
After unpacking the switch, 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.
Package Contents
• 24-Port Fast Ethernet Switch
• Four adhesive foot pads
• Bracket Mounting Kit containing two brackets and four screws for attaching the brackets to the switch
• Power Cord—either US, Continental Europe or UK
• RS-232 console cable
• This Installation Guide
• Management Guide
3-1
Installing the Switch
Optional Rack-Mounting Equipment
If you plan to rack-mount the switch, be sure to have the following equipment available:
• Four mounting screws for each device you plan to install in a rack—these are not included
• A screwdriver (Phillips or flathead, depending on the type of screws used)
Mounting
A switch unit can be mounted in a standard 19-inch equipment rack or on a desktop or shelf. Mounting instructions for each type of site follow.
Installing Optional Modules: Before mounting the switch, be sure you install any optional modules. If you have purchased optional slide-in 1000BASE-T,
1000BASE-SX, 1000BASE-LX, 100BASE-FX, or 1000BASE-X GBIC media
Rack Mounting
Before rack mounting the switch, pay particular 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. (See page C-1.)
• Mechanical Loading: Do not place any equipment on top of a rack-mounted unit
• Circuit Overloading: Be sure that the supply circuit to the rack assembly is not overloaded.
• Grounding: Rack-mounted equipment should be properly grounded. Particular attention should be given to supply connections other than direct connections to the mains.
To rack-mount devices:
1.
Attach the brackets to the device using the screws provided in the Bracket
Mounting Kit.
100BASE-FX
Singlemode
Module
TX
RX
Link
PWR
Duplex
Diag
M1
RPU
M2
Stack
3-2
Mounting
Figure 3-1. Attaching the Brackets
2.
Mount the device in the rack, using four rack-mounting screws (not provided).
100BASE-FX
Singlemode
Module
Module
1
TX
RX
Link
PWR
Duplex
Diag
M1
RPU
M2
Stack
Figure 3-2. Installing the Switch in a Rack
3.
If installing a single switch only, turn to “Connecting to a Power Source” at the
end of this chapter.
4.
If installing multiple switches, mount them in the rack, one below the other, in any order.
Desktop or Shelf Mounting
1.
Attach the four adhesive feet to the bottom of the first switch.
ck
Duplex
1
Module
2
Module
Figure 3-3. Attaching the Adhesive Feet
3-3
Installing the Switch
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.
3.
If installing a single switch only, go to “Connecting to a Power Source” at the
end of this chapter.
4.
If installing multiple switches, attach four adhesive feet to each one. Place each device squarely on top of the one below, in any order.
Installing an Optional Module into the Switch
Module
2
Module
1
Link
PWR
Duplex
Diag
M1
RPU
M2
Stack
100B
ASE-FX
Sing lemod e Module
TX
RX
Figure 3-4. Installing an Optional Module
Caution: DO NOT install slide-in modules with the switch powered on. Be sure you power off the switch before installing any module.
Note: The stacking module must only be installed in slot Module 2.
To install an optional module into the switch, do the following:
1.
Disconnect power to the switch.
2.
Remove the blank metal plate (or a previously installed module) from the appropriate slot by removing the two screws with a flat-head screwdriver.
3.
With the module still in the anti-static bag, touch the metal frame of the switch to prevent damage caused by static electricity discharge. Also, it is recommended to use an ESD wrist strap during installation.
4.
Remove the module from the anti-static shielded bag.
3-4
Installing a GBIC Transceiver
5.
Holding the module level, guide it into the carrier rails on each side and gently push it all the way into the slot, ensuring that it firmly engages with the connector.
Installing a GBIC Transceiver
1000BA
SE-X
GBIC
Module Module
1
Link
Duplex
PWR
Diag
M1
RPU
M2
Stack
Figure 3-5. Installing a GBIC Transceiver
You can install a GBIC transceiver as described below:
1.
Insert the transceiver with the SC connector facing out toward you. Note that the transceiver is keyed so that it can only be installed in one orientation.
2.
Press in on the transceiver’s side tabs, and gently slide it into the GBIC interface slot until it clicks into place.
Note: GBIC transceivers are hot-swappable. You do not need to power off the switch before installing or removing a transceiver.
Caution: Install only 5 V GBIC transceivers into the module slots.
3-5
Installing the Switch
Connecting to the Stack’s Backplane
Plug one end of the stack cable (ordered separately) in the TX (right) port of the top unit and the other end to the RX (left) port of the next unit. Repeat this step for each unit in the stack. Form a simple chain starting at the TX port on the top unit and ending at the RX port on the bottom unit (stacking up to 8 units). Finally, complete the stack connections by plugging one end of a stack cable into the TX port on the bottom unit and the other end into the RX port on the top unit.
Stacking
Module
RX
TX
Module
1
Stacking
Module
RX
Module
2
TX
Module
1
Stacking
Module
RX
Module
2
TX
Link
Duple x
PWR
Diag
M1
RPU
M2
Stack
Module
1
Link
Duplex
PWR
Diag
M1
RPU
M2
Stack
Figure 3-6. Connecting to backplane
Select the Master unit in the stack by pressing the push button in on only one of the stacking modules. Only one switch in the stack can operate as the Master, all other units operate in slave mode. If more than one switch in the stack is selected as
Master, or if no switches are selected, the stack will not function.
Note: The stacking feature requires that all stacking module ports be connected and the switches powered on. If one stack link is not connected, or if a switch is powered off, the stack will not function.
3-6
Connecting to a Power Source
Connecting to a Power Source
To connect a device to a power source:
1.
Insert the power cable plug directly into the receptacle located at the back of the device.
100-240V~
50/60Hz, 2A
Figure 3-7. Power Receptacle
2.
Plug the other end of the cable into a grounded, 3-pin socket.
Note: 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 receptacle type in your country.
3.
Check the front-panel LEDs as the device is powered on to be sure the Power
LED is lit. If not, check that the power cable is correctly plugged in.
3-7
Installing the Switch
3-8
Chapter 4: Making Network Connections
Connecting Network Devices
The switch may be connected to 10 or 100 Mbps network cards in PCs and servers, as well as to Ethernet and Fast Ethernet hubs and switches. It may also be connected to remote devices using the optional fiber optic modules.
Twisted-Pair Devices
Each device requires a shielded or unshielded twisted-pair (STP or UTP) cable with
RJ-45 connectors at both ends. For 1000BASE-T Category 5, 5e, or 6 cable is required, for 100BASE-TX connections, Category 5 cable is required; for 10BASE-T,
Category 3, 4 or 5 cable can be used.
Cabling Guidelines
A twisted-pair connection between two ports must have a crossover of the transmit and receive wires to be able to function. This crossover can be implemented in either of the ports, or in the cable connecting them.
Network card ports in PCs and servers do not contain an internal wiring crossover, these are known as straight-through (MDI) ports. Therefore, most switch and hub ports implement a built-in crossover — known as fixed crossover (MDI-X) ports — so that they can be connected to PCs and servers using standard straight-through cable. Some switches and hubs also have an MDI port, so that they can connect to another switch’s/hub’s MDI-X port using straight-through cable. To connect between two switches/hubs that only have fixed MDI-X ports, the wiring crossover must be implemented in the cable — known as a crossover cable.
The RJ-45 ports on the switch base unit support automatic MDI/MDI-X operation, which means that they automatically detect the wiring in the link and configure as
MDI or MDI-X accordingly. So for these ports, you can use standard straight-through twisted-pair cables to connect to any other network device (PCs, servers, switches, hubs, or routers). However, note that auto-negotiation must be enabled on these ports for automatic wiring configuration to function properly.
4-1
Making Network Connections
Connecting to PCs, Servers, Hubs and Switches
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.
1.
Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector.
Figure 4-1. Making Twisted-Pair Connections
2.
If the device is a PC 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 “Wiring Closet Connections” on the next page.) Otherwise, attach the other end to an available port on the switch.
3.
Make sure each twisted pair cable does not exceed 100 meters (328 ft) in length.
Note: When connected to a shared collision domain (such as a hub with multiple workstations), switch ports must be set to half-duplex mode.
4.
As each connection is made, the green Link LED (on the switch) corresponding to each port will light to indicate that the connection is valid.
Wiring Closet Connections
Today, the punch-down block is an integral part of many of the newer equipment racks. It is actually part of the patch panel. Instructions for making connections in the wiring closet with this type of equipment follows.
1.
Attach one end of a patch cable to an available port on the switch, and the other end to the patch panel.
2.
If not already in place, attach one end of a cable segment to the back of the patch panel where the punch-down block is located, and the other end to a
4-2
modular wall outlet.
3.
Label the cables to simplify future troubleshooting.
24-Port Fast Ethernet Switch
Equipment Rack
(side view)
Module 2 Module 1
Twisted-Pair Devices
Patch Panel
Punch-Down Block
Wall
Figure 4-2. Wiring Closet Connections
4-3
Making Network Connections
Fiber Optic Devices
An optional slide-in 1000BASE-SX, 1000BASE-LX or 100BASE-FX module, or
1000BASE-X transceiver may be used for backbone and long distance connections.
A 1000BASE-SX, 100BASE-LX, or 1000BASE-X transceiver may also be for connecting to a high-speed server.
Each single-mode fiber optic port requires 9/125 micron multimode fiber optic cabling with an SC connector at both ends. Each multimode fiber optic port requires
50/125 or 62.5/125 micron multimode fiber optic cabling with an SC connector at both ends.
Warning: This switch uses lasers to transmit signals over fiber optic cable. The lasers are compliant with the requirements of a Class 1 Laser Product and are inherently eye safe in normal operation. However, you should never look directly at a transmit port when it is powered on.
1.
Remove and keep the SC port’s rubber plug. When not connected to a fiber cable, the rubber plug should be replaced to protect the optics.
2.
Check that the fiber terminators are clean. You can clean the cable plugs by wiping them gently with a clean tissue or cotton ball moistened with a little ethanol. Dirty fiber terminators on fiber optic cables will impair the quality of the light transmitted through the cable and lead to degraded performance on the port.
3.
Connect one end of the cable to the SC port on the switch and the other end to the SC port on the other device. Since SC connectors are keyed, the cable can be attached in only one orientation.
SC fiber connector
Module
2
100BAS
E-FX Sing lemode
Module
Module
1
TX
RX
Link
PWR
Duplex
Diag
M1
RPU
M2
Stack
Figure 4-3. Making SC Port Connections
4.
As a connection is made, check the Activity LED on the switch’s front panel for the corresponding module to be sure that the connection is valid.
4-4
Appendix A: Troubleshooting
Diagnosing Switch Indicators
Symptom
PWR LED is Off
PWR LED is Amber
Link LED is Off
Troubleshooting Chart
Action
• Internal power supply is disconnected.
• Check connections between the switch, the power cord, the wall outlet.
• Internal power supply has failed.
• Contact your local dealer for assistance.
• Verify that the switch and attached device are powered on.
• Be sure the cable is plugged into both the switch and corresponding device.
• If the switch is installed in a rack, check the connections to the punch-down block and patch panel.
• Verify that the proper cable type is used and its length does not exceed specified limits.
• Check the adapter on the attached device and cable connections for possible defects. Replace the defective adapter or cable if necessary.
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply.
However, if the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet, and verify that the fans on the unit are unobstructed and running prior to shutdown. If you still cannot isolate the problem, then the internal power supply may be defective.
Installation
Verify that all system components have been properly installed. If one or more components appear to be malfunctioning (such as the power cord or network cabling), test them in an alternate environment where you are sure that all the other components are functioning properly.
In-Band Access
You can access the management agent in the switch from anywhere within the attached network using Telnet, a Web browser, or other network management software. However, you must first configure the switch with a valid IP address, subnet mask, and default gateway. If you have trouble establishing a link to the management agent, check to see if you have a valid network connection. Then
A-1
Troubleshooting verify that you entered the correct IP address. Also, be sure the port through which you are connecting to the switch has not been disabled.
If it has not been disabled, then check the network cabling that runs between your remote location and the switch.
Note: The management agent accepts up to four simultaneous Telnet sessions. If the maximum number of sessions already exists, an additional Telnet connection will not be able to log into the system.
A-2
Appendix B: Cables
Specifications
Cable
10BASE-T
100BASE-TX
100BASE-FX
100BASE-FX
1000BASE-SX
1000BASE-LX
1000BASE-T
Cable Types and Specifications
Type
Cat. 3, 4, 5 100-ohm UTP
Max. Length
100 m (328 ft)
Cat. 5 100-ohm UTP
50/125 or 62.5/125 micron core multimode fiber (MMF)
9/125 9 micron core single-mode fiber (SMF)
50/125 or 62.5/125 micron core
MMF
9/125 micron SMF
Cat. 5, 5e, or 6 100-ohm UTP
100 m (328 ft)
2 km (1.24 miles)
20 km (12.43 miles)
See the following table
5 km (3.12 miles)
100 m (328 ft)
Connector
RJ-45
RJ-45
SC
SC
SC
SC
RJ-45
Fiber Diameter
62.5/125 micron MMF
50/125 micron MMF
1000BASE-SX Fiber Specifications
Fiber Bandwidth
160 MHz/km
200 MHz/km
400 MHz/km
500 MHz/km
Maximum Cable Length
2-220 m (7-722 ft)
2-275 m (7-902 ft)
2-500 m (7-1641 ft)
2-550 m (7-1805 ft)
B-1
Cables
Twisted-Pair Cable and Pin Assignments
Caution: DO NOT plug a phone jack connector into any RJ-45 port. Use only twisted-pair cables with RJ-45 connectors that conform with FCC standards.
For 10BASE-T/100BASE-TX connections, a twisted-pair cable must have two pairs of wires. Each wire pair is identified by two different colors. For example, one wire might be red and the other, red with white stripes. Also, an RJ-45 connector must be attached to both ends of the cable.
Caution: Each wire pair must be attached to the RJ-45 connectors in a specific
orientation. (See “Cabling Guidelines” on page 4-1 for an explanation.)
The figure below illustrates how the pins on the RJ-45 connector are numbered. Be sure to hold the connectors in the same orientation when attaching the wires to the pins.
10BASE-T/100BASE-TX Pin Assignments
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm Category 3, 4 or 5 cable for 10 Mbps connections or 100-ohm
Category 5 cable for 100 Mbps connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).
The RJ-45 ports on the switch base unit support automatic MDI/MDI-X operation, you can use straight-through cables for all network connections to PCs or servers, or to other switches or hubs. In straight-through cable, pins 1, 2, 3, and 6, at one end of the cable, are connected straight through to pins 1, 2, 3, and 6 at the other end of the cable. When using any RJ-45 port on this switch, you can use either straight-through or crossover cable.
1
2
Pin MDI-X Signal Name
Receive Data plus (RD+)
Receive Data minus (RD-)
MDI Signal Name
Transmit Data plus (TD+)
Transmit Data minus (TD-)
3
6
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Receive Data plus (RD+)
Receive Data minus (RD-)
4,5,7,8 Not used Not used
Note: The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
B-2
1000BASE-T Pin Assignments
Straight-Through Wiring
If the twisted-pair cable is to join two ports and only one of the ports has an internal crossover (MDI-X), the two pairs of wires must be straight-through. (When auto-negotiation is enabled for any RJ-45 port on this switch, you can use either straight-through or crossover cable to connect to any device type.)
Straight-Through RJ-45 Pin Assignments
End 1
1 (RD+)
End 2
1 (TD+)
2 (RD-)
3 (TD+)
6 (TD-)
2 (TD-)
3 (RD+)
6 (RD-)
Crossover Wiring
If the twisted-pair cable is to join two ports and either both ports are labeled with an
“X” (MDI-X) or neither port is labeled with an “X” (MDI), a crossover must be implemented in the wiring. (When auto-negotiation is enabled for any RJ-45 port on this switch, you can use either straight-through or crossover cable to connect to any device type.)
Crossover RJ-45 Pin Assignments
End 1
1 (TD+)
2 (TD-)
3 (RD+)
6 (RD-)
End 2
3 (RD+)
6 (RD-)
1 (TD+)
2 (TD-)
1000BASE-T Pin Assignments
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports require that all four pairs of wires be connected. Note that for 1000BASE-T operation, all four pairs of wires are used for both transmit and receive.
Use 100-ohm Category 5, 5e, or 6 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).
3
4
1
2
Pin MDI Signal Name MDI-X Signal Name
Transmit Data plus (TD1+) Transmit Data plus (TD2 +)
Receive Data minus (RD1-) Receive Data minus (RD2-)
Transmit Data plus (TD2+)
Transmit Data plus (TD3+)
Transmit Data plus (TD1+)
Transmit Data plus (TD4+)
B-3
Cables
6
7
8
Pin
5
MDI Signal Name MDI-X Signal Name
Receive Data minus (RD3-) Receive Data minus (RD4-)
Receive Data minus (RD2-) Receive Data minus (RD1-)
Transmit Data plus (TD4+) Receive Data minus (RD3+)
Receive Data minus (RD4-) Receive Data minus (RD3-)
B-4
1000BASE-T Cable Requirements
1000BASE-T Cable Requirements
All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four wire pairs are connected. However, it is recommended that for all critical connections, or any new cable installations,
Category 5e (enhanced Category 5) or 6 cable should be used. The Category 5e and 6 specification includes test parameters that are only recommendations for
Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3ab standards.
Cable Testing for Existing Category 5 Cable
Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk
(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional
Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”
Note that when testing your cable installation, be sure to include all patch cables between switches and end devices.
Adjusting Existing Category 5 Cabling
If your existing Category 5 installation does not meet one of the test parameters for
1000BASE-T, there are basically three measures that can be applied to try to correct the problem:
1.
Replace any Category 5 patch cables with high-performance Category 5e or 6 cables.
2.
Reduce the number of connectors used in the link.
3.
Reconnect some of the connectors in the link.
Console Port Pin Assignments
The DB-9 serial port on the switch’s front panel is used to connect to the switch for out-of-band console configuration. The on-board menu-driven configuration program can be accessed 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
B-5
Cables tables.
DB-9 Port Pin Assignments
EIA
Circuit
CCITT
Signal
Description
BB
BA
AB
104
103
102
RxD (Received Data)
TxD (Transmitted Data)
SG (Signal Ground)
No other pins are used.
3
5
2
Switch’s
DB9 DTE
Pin #
2
3
5
PC DB9
DTE
Pin #
2
7
3
PC DB25
DTE
Pin #
Console Port to 9-Pin DTE Port on PC
Switch’s 9-Pin
Serial Port
2 RXD <---------
3 TXD
5 SGND
-----------
-----------
No other pins are used.
Null Modem
TXD
PC’s 9-Pin
DTE Port
-----------3 TXD
RXD
SGND
----------> 2 RXD
---------5 SGND
Console to 25-Pin DTE Port on PC
Switch’s 9-Pin
Serial Port
2 RXD
3 TXD
<---------
-----------
5 SGND -----------
No other pins are used.
Null Modem
TXD
RXD
SGND
PC’s 25-Pin
DTE Port
-----------2 TXD
----------> 3 RXD
---------7 SGND
B-6
Appendix C: Specifications
Physical Characteristics
Base Unit
Ports
24 10BASE-T/100BASE-TX, with auto-negotiation
Media Slots
2 slots for optional 100BASE-FX, 1000BASE-T, 1000BASE-SX,1000BASE-LX,
2-port 1000BASE-T and 1000BASE-X with SFP slots, and 1000BASE-X GBIC modules
Network Interface
10BASE-T: RJ-45 (100-ohm, UTP cable; Categories 3, 4, 5)
100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5)
Ports 1-24: RJ-45 connectors, auto MDI/MDI-X
Communication Speed
10 and 100 Mbps
Communication Mode
Full and half duplex
Buffer Architecture
32 Mbyte per system
Aggregate Bandwidth
8.8 Gbps
Switching Database
8K MAC address entries
LEDs
System: PWR, Diag, Stack
Ports: Link/Activity
Weight
4.06 kg (6 lb 13 oz)
Size
44 x 32.4 x 4.3 cm (17.32 x 12.8 x 1.69 in.)
C-1
Specifications
Temperature
Operating: 0 to 50 °C (32 to 122 °F)
Storage: -40 to 70 °C (-40 to 158 °F)
Humidity
Operating: 10% to 90%
Power Supply
Internal, auto-ranging transformer: 100 to 240 VAC, 47 to 63 Hz
Power Consumption
60 Watts maximum
Heat Dissipation
205 BTU/hr maximum
Maximum Current
3.0 A @ 110 V
2.0 A @ 240 V
Switch Features
Spanning Tree Protocol
Forwarding Mode
Store-and-forward
Throughput
Wire speed
Flow Control
Full Duplex: IEEE 802.3x
Half Duplex: Back pressure
Broadcast Storm Suppression
Traffic throttled above a critical threshold
VLAN Support
Up to 25 6 groups; port-based or with 802.1Q VLAN tagging,
GVRP for automatic VLAN learning, private VLANs
Multicast Switching
IGMP Snooping
Quality of Service
Supports four levels of priority and Weighted Round Robin Queueing
C-2
(which can be configured by VLAN tag or port),
Layer 3/4 priority mapping: IP Precedence, IP DSCP
Switch Features
C-3
Specifications
Management Features
In-Band Management
Telnet, or SNMP manager
Out-of-Band Management
RS-232 DB-9 console port
Software Loading
TFTP in-band, or XModem out-of-band
MIB Support
MIB II (RFC1213), Bridge MIB (RFC 1493, without Static Table)
Standards
IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet
IEEE 802.1p priority tags
IEEE 802.3ac VLAN tagging
IEEE 802.1D (Bridging)
IEEE 802.1w Rapid Spanning Tree Protocol
IEEE 802.3ad Link Aggregation
IEEE 802.1Q VLAN Bridge Management
IEEE 802.1x RADIUS user authentication
IEEE 802.3x full-duplex flow control
ISO/IEC 8802-3
UDP (RFC 768), IP (RFC 791), TCP (RFC793), TFTP (RFC 783), TELNET
(RFC 783), SNMP (RFC 1157), MIB II (RFC 1213), Traps (RFC 1215), Bridge MIB
(RFC 1493), RMON (RFC 1757), HTML (RFC 1866), HTTP (RFC 2068), RADIUS
(RFC 2618)
C-4
Compliances
CE Mark
Emissions
FCC Class A
Industry Canada Class A
EN55022 (CISPR 22) Class A
EN 61000-3-2/3
VCCI Class A
C-Tick - AS/NZS 3548 (1995) Class A
Immunity
EN 61000-4-2/3/4/5/6/8/11
Safety
CSA/NRTL (CSA 22.2.950 & UL 1950)
TUV/GS (EN60950)
Slide-in Modules
100BASE-FX Extender Modules
Ports
1 100BASE-FX, SC connectors
Communication Speed
100 Mbps
Communication Mode
Full duplex
Network Interface
MS-3726-SFC: 9/125 micron single-mode fiber cable
MS-3726-MFC: 50/125 or 62.5/125 micron multimode fiber cable
Standards
IEEE 802.3u Fast Ethernet
ISO/IEC 8802-3
1000BASE-T Extender Module
Ports
1 10000BASE-T, RJ-45 connector
Communication Speed
10/100/1000 Mbps
Compliances
C-5
Specifications
Communication Mode
Full duplex only at 1000 Mbps
Full and half duplex at 10/100 Mbps
Network Interface
RJ-45 (100-ohm, UTP cable; Category 5, 5e, or 6)
Standards
IEEE 802.3ab Gigabit Ethernet
IEEE 802.3u Fast Ethernet
IEEE 802.3 Ethernet
1000BASE-SX Extender Module
Ports
1 1000BASE-SX SC-type port
Communication Speed
1000 Mbps
Communication Mode
Full duplex
Network Interface
SC connector: 50/125 or 62.5/125 micron multimode fiber cable
Standards
IEEE 802.3z Gigabit Ethernet
1000BASE-LX Extender Module
Ports
1 1000BASE-LX SC-type port
Communication Speed
1000 Mbps
Communication Mode
Full duplex
Network Interface
SC connector, 9/125 micron single-mode fiber
Standards
IEEE 802.3z Gigabit Ethernet
C-6
Slide-in Modules
1000BASE-X GBIC Module
Ports
1 slot for GBIC transceivers
Communication Speed
1000 Mbps
Communication Mode
Full Duplex
Standards
IEEE 802.3z Gigabit Ethernet
Combo Module
Ports
1 Gigabit RJ-45 port, 1 Small Form Factor Pluggable (SFP) transceiver slot
Communication Speed
1000 Mbps
Communication Mode
Full Duplex
Network Interface
SC connector, 9/125 micron single-mode fiber
Standards
LC, MT-RJ, or SG conector, 50/125 or 62.5/125 micron multimode fiber cable
9/125 micron single-mode fiber cable
Stacking Module
Ports
2 USB Type-A ports
C-7
Specifications
C-8
Glossary
10BASE-T
IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5
UTP cable.
100BASE-FX
IEEE 802.3u specification for 100 Mbps Fast Ethernet over two strands of 50/125 or
62.5/125 micron core fiber cable.
100BASE-TX
IEEE 802.3u specification for 100 Mbps Fast Ethernet over two pairs of Category 5
UTP cable.
1000BASE-LX
IEEE 802.3z specification for Gigabit Ethernet over one strand of 9/125 micron core fiber cable.
1000BASE-LH
Gigabit Ethernet over two strands of 9/125 micron core fiber cable.
1000BASE-SX
IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or
62.5/125 micron core fiber cable.
1000BASE-T
IEEE 802.3ab specification for Gigabit Ethernet over two pairs of Category 5, 5e, or
6 100-ohm UTP cable.
Auto-Negotiation
Signalling method allowing each node to select its optimum operational mode (e.g.,
10, 100, or 1000 Mbps and half or full duplex) based on the capabilities of the node to which it is connected.
Bandwidth
The difference between the highest and lowest frequencies available for network signals. Also synonymous with wire speed, the actual speed of the data transmission along the cable.
Glossary-1
Glossary
Collision
A condition in which packets transmitted over the cable interfere with each other.
Their interference makes both signals unintelligible.
Collision Domain
Single CSMA/CD LAN segment.
CSMA/CD
Carrier Sense Multiple Access/Collision Detect is the communication method employed by Ethernet and Fast Ethernet.
End Station
A workstation, server, or other device that does not act as a network interconnection.
Ethernet
A network communication system developed and standardized by DEC, Intel, and
Xerox, using baseband transmission, CSMA/CD access, logical bus topology, and coaxial cable. The successor IEEE 802.3 standard provides for integration into the
OSI model and extends the physical layer and media with repeaters and implementations that operate on fiber, thin coax and twisted-pair cable.
Fast Ethernet
A 100 Mbps network communication system based on Ethernet and the CSMA/CD access method.
Fast Ethernet Switch
Device that provides a full 100 Mbps bandwidth (or either 10 or 100 Mbps bandwidth with Auto-Negotiation) to each port (LAN segment).
Full Duplex
Transmission method that allows switch and network card to transmit and receive concurrently, effectively doubling the bandwidth of that link.
Gigabit Ethernet
A 1000 Mbps network communication system based on Ethernet and the CSMA/CD access method.
IEEE 802.3
Defines carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications.
Glossary-2
Glossary
IEEE 802.3ab
Defines CSMA/CD access method and physical layer specifications for
1000BASE-T Gigabit Ethernet.
IEEE 802.3u
Defines CSMA/CD access method and physical layer specifications for
100BASE-TX Fast Ethernet.
IEEE 802.3x
Defines Ethernet frame start/stop requests and timers used for flow control on full-duplex links.
IEEE 802.3z
Defines CSMA/CD access method and physical layer specifications for 1000BASE
Gigabit Ethernet over fiber cable.
LAN Segment
Separate LAN or collision domain.
LED
Light emitting diode used for monitoring a device or network condition.
Link Segment
Length of twisted-pair or fiber cable joining a pair of repeaters or a repeater and a
PC.
Local Area Network (LAN)
A group of interconnected computer and support devices.
Media Access Control (MAC)
A portion of the networking protocol that governs access to the transmission medium, facilitating the exchange of data between network nodes.
MIB
An acronym for Management Information Base. It is a set of database objects that contains information about the device.
Network Diameter
Wire distance between two end stations in the same collision domain.
Glossary-3
Glossary
RJ-45 Connector
A connector for twisted-pair wiring.
Switched Ports
Ports that are on separate collision domains or LAN segments.
Transmission Control Protocol/Internet Protocol (TCP/IP)
Protocol suite that includes TCP as the primary transport protocol, and IP as the network layer protocol.
UTP
Unshielded twisted-pair cable.
Glossary-4
Index
Numerics
1000 Mbps connectivity rules 2-5
1000BASE-LX fiber cable lengths 2-5
1000BASE-SX fiber cable lengths 2-5
1000BASE-T
100BASE-FX
100BASE-TX
10BASE-T/100BASE-TX Pin
A
B
C
cleaning fiber terminators 4-4
compliances
console port pin assignments B-5
D
E
electrical interference, avoiding 3-1 equipment checklist 3-1
F
G
Gigabit Ethernet cable lengths 2-5
I
installation
connecting devices to the switch 4-2
installing a GBIC transceiver 3-5
installing optional modules 3-2
L
LED indicators
Index-1
Index
M management
modules
mounting the switch
multimode fiber optic cables 4-4
N network
O optional modules
P
Q
R
RJ-45 ports
rubber foot pads, attaching 3-3
S
single-mode fiber optic cables 4-4
specifications
1000BASE-X GBIC module C-5 , C-6
standards
switching, introduction to 2-1
T
troubleshooting
in-band access A-1 power and cooling problems A-1 switch indicators A-1
V
W
Index-2
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