This chapter describes how to install your switch, interpret the power-on self-test (POST), and connect the switch to other devices. Read these topics and perform the procedures in this order:

Preparing for Installation

This section provides information about these topics:

Warnings

These warnings are translated into several languages in "Translated Safety Warnings."

Warning This equipment is to be installed and maintained by service personnel only as defined by AS/NZS 3260 Clause 1.2.14.3 Service Personnel.

Warning Only trained and qualified personnel should be allowed to install or replace this equipment.

Warning Read the installation instructions before you connect the system to its power source.

Warning Unplug the power cord before you work on a system that does not have an on/off switch.

Warning Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage.

Warning The plug-socket combination must be accessible at all times because it serves as the main disconnecting device.

Warning To prevent the switch from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of 113ºF (45ºC). To prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around the ventilation openings.

Warning When installing the unit, always make the ground connection first and disconnect it last.

Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.

Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.

Warning Ultimate disposal of this product should be handled according to all national laws and regulations.

Warning Attach only the Cisco RPS (model PWR300-AC-RPS-N1) to the RPS receptacle.

Warning Class 1 laser product

Warning Avoid exposure to the laser beam.

EMC Regulatory Statements

This section includes specific regulatory statements about the Catalyst 2950 switches.

U.S.A.

U.S. regulatory information for this product is in the front matter of this manual.

This is a Class A Information product. When used in a residential environment, it may cause radio frequency interference. Under such circumstances, the user may be requested to take appropriate countermeasures.

Japan

This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.

Korea

Warning This is a Class A Device and is registered for EMC requirements for industrial use. The seller or buyer should be aware of this. If this type was sold or purchased by mistake, it should be replaced with a residential-use type.

Hungary

This equipment is a Class A product and should be used and installed properly according to the Hungarian EMC Class A requirements (MSZEN55022). Class A equipment is designed for typical commercial establishments for which special conditions of installation and protection distance are used.

Figyelmeztetés a felhasználói kézikönyv számára:
Ez a berendezés "A" osztályú termék, felhasználására és üzembe helyezésére a magyar EMC "A" osztályú követelményeknek (MSZ EN 55022) megfeleloen kerülhet sor, illetve ezen "A" osztályú berendezések csak megfelelo kereskedelmi forrásból származhatnak, amelyek biztosítják a megfelelo speciális üzembe helyezési körülményeket és biztonságos üzemelési távolságok alkalmazását.

Installation Guidelines

When determining where to place the switch, observe these guidelines.

For 10/100 ports and 10/100/1000 ports , the cable length from a switch to an attached device cannot exceed 328 feet (100 meters).

For 100BASE-FX ports, the cable length from a switch to an attached device cannot exceed 6562 feet (2 kilometers).

For 1000BASE-SX ports and 1000BASE-SX GBIC module ports, the cable length from a switch to an attached device cannot exceed 1804 feet (550 meters).

For 1000BASE-LX/LH GBIC module ports, the cable length from a switch to an attached device cannot exceed 32,810 feet (10 kilometers).

For 1000BASE-ZX GBIC module ports, the cable length from a switch to an attached device cannot exceed 328,100 feet (100 kilometers).

For 1000BASE-T GBIC module ports, the cable length from switch to an attached device cannot exceed 328 feet (100 meters).

For Coarse Wave Division Multiplexing (CWDM) GBIC module ports, the cable length from a switch to an attached device cannot exceed 393,719 feet (120 kilometers). For specific cable lengths, refer to the CWDM GBIC module documentation.

For GigaStack GBIC module ports, the cable length from a switch to an attached device cannot exceed 3 feet (1 meter).

Operating environment is within the ranges listed in "Technical Specifications."
Clearance to front and rear panels meet these conditions:

Front-panel LEDs can be easily read.
Access to ports is sufficient for unrestricted cabling.
Rear-panel AC power connector is within reach of an AC power outlet.
Rear-panel direct current (DC) power connector is within reach of a circuit breaker.

Airflow around the switch and through the vents is unrestricted.

Temperature around the unit does not exceed 113°F (45°C).

Note If the switch is installed in a closed or multirack assembly, the temperature around it might be greater than normal room temperature.

Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent lighting fixtures.

Verifying Package Contents

Note Carefully remove the contents from the shipping container, and check each item for damage. If any item is missing or damaged, contact your Cisco representative or reseller for support. Return all packing materials to the shipping container and save them.

The switch is shipped with these items:

This Catalyst 2950 Desktop Switch Hardware Installation Guide
Where to Find the Catalyst 2950 Documentation flyer
Cisco Documentation CD-ROM
AC power cord
Mounting kit containing these items:

Four rubber feet for mounting the switch on a table, shelf, or desk
Two 19-inch or 24-inch rack-mounting brackets
Six number-8 Phillips flat-head screws for attaching the brackets to the switch
Four number-8 Phillips truss-head screws for attaching the brackets to the switch
Four number-12 Phillips machine screws for attaching the brackets to a rack
One cable guide and one black Phillips machine screw for attaching the cable guide to one of the mounting brackets

DC-switch kit containing these items:

One DC terminal block plug (also called a terminal block header)
One ground lug
Two number-10-32 screws for attaching the ground lug to the switch
Two 23-inch rack-mounting brackets (with 1-inch spacing for telco racks)
Four number-8 Phillips truss-head screws for attaching the brackets to the switch
Two number-12 Phillips machine screws for attaching the brackets to a rack

Note The DC-switch kit ships only with the Catalyst 2950G-24-EI-DC switch.

One RJ-45-to-DB-9 adapter cable
Cisco Information Packet, containing safety and support information

If you want to connect a terminal to the switch console port, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) with that adapter from Cisco.

You can connect a 100BASE-FX or 1000BASE-SX port to an SC or ST port on a target device by using one of the MT-RJ fiber-optic patch cables listed in Table 2-1. Use the Cisco part numbers in Table 2-1 to order the patch cables that you need.

Table 2-1: MT-RJ Patch Cables for 100BASE-FX and 1000BASE-SX Connections

Type	Cisco Part Number
1-meter, MT-RJ-to-SC multimode cable	CAB-MTRJ-SC-MM-1M
3-meter, MT-RJ-to-SC multimode cable	CAB-MTRJ-SC-MM-3M
5-meter, MT-RJ-to-SC multimode cable	CAB-MTRJ-SC-MM-5M
1-meter, MT-RJ-to-ST multimode cable	CAB-MTRJ-ST-MM-1M
3-meter, MT-RJ-to-ST multimode cable	CAB-MTRJ-ST-MM-3M
5-meter, MT-RJ-to-ST multimode cable	CAB-MTRJ-ST-MM-5M

Installing the Switch in a Rack

Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:

This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.
If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Note Figure 2-1 to Figure 2-17 show the Catalyst 2950-24, 2950G-24-EI-DC, and 2950G-48-EI switches as examples. You can install other Catalyst 2950 switches in a rack as shown in these illustrations.

To install the switch in a 19-, 23-, or 24-inch rack, follow these steps:

Attaching the Brackets to the Switch
Mounting the Switch in a Rack
Attaching the Optional Cable Guide

Note Installing the Catalyst 2950G-48-EI switch in a 23-inch or 24-inch rack requires an optional bracket kit not included with the switch. You can order a kit containing the 23-inch or 24-inch rack-mounting brackets and hardware from Cisco (part number RCKMNT-1RU=).

Attaching the Brackets to the Switch

The bracket orientation and the screws that you use depend on whether you are attaching the brackets to a 19-, 23-, or 24-inch rack. Follow these guidelines:

When mounting a switch other than a Catalyst 2950G-48-EI switch in a 19-inch rack, use two Phillips flat-head screws to attach the long side of the 19- or 24-inch bracket to the switch. See Figure 2-1, Figure 2-2, and Figure 2-3.
When mounting a Catalyst 2950G-48-EI switch in a 19-inch rack, use three Phillips flat-head screws to attach the long side of the 19- or 24-inch bracket to the switch. See Figure 2-4, Figure 2-5, and Figure 2-6.
When mounting a Catalyst 2950G-24-EI-DC switch in a 23-inch rack, use two Phillips truss-head screws to attach the 23-inch bracket to the switch. See Figure 2-7, Figure 2-8, and Figure 2-9.
When mounting a switch other than a Catalyst 2950G-48-EI switch in a 24-inch rack, use two Phillips truss-head screws to attach the 19- or 24-inch bracket to the switch. See Figure 2-10, Figure 2-11, and Figure 2-12.
When mounting a Catalyst 2950G-48-EI switch in a 24-inch rack, use three Phillips flat-head screws to attach the 24-inch bracket (part number RCKMNT-1RU=) to the switch. See Figure 2-13, Figure 2-14, and Figure 2-15.

Figure 2-1 to Figure 2-15 show how to attach a bracket to one side of the switch. Follow the same steps to attach the second bracket to the opposite side of the switch.

Figure 2-1: Attaching Brackets on the Switch in a 19-Inch Rack (Front Panel Forward)

Figure 2-2: Attaching Brackets on the Switch in a 19-Inch Rack (Rear Panel Forward)

Figure 2-3: Attaching Brackets on the Switch in a 19-Inch Telco Rack

Figure 2-4: Attaching Brackets on the Catalyst 2950G-48-EI Switch in a 19-Inch Rack (Front Panel Forward)

Figure 2-5: Attaching Brackets on the Catalyst 2950G-48-EI Switch in a 19-Inch Rack (Rear Panel Forward)

Figure 2-6: Attaching Brackets on the Catalyst 2950G-48-EI Switch in a 19-Inch Telco Rack

Figure 2-7: Attaching Brackets on the Catalyst 2950G-24-EI-DC Switch in a 23-Inch Telco Rack (Front Panel Forward)

Figure 2-8: Attaching Brackets on the Catalyst 2950G-24-EI-DC Switch in a 23-Inch Telco Rack
(Rear Panel Forward)

Figure 2-9: Attaching Brackets on the Catalyst 2950G-24-EI-DC Switch in a 23-Inch Telco Rack

Figure 2-10: Attaching Brackets on the Switch in a 24-Inch Rack (Front Panel Forward)

Figure 2-11: Attaching Brackets on the Switch in a 24-Inch Rack (Rear Panel Forward)

Figure 2-12: Attaching Brackets on the Switch in a 24-Inch Telco Rack

Figure 2-13: Attaching Brackets on the Catalyst 2950G-48-EI Switch in a 24-Inch Rack (Front Panel Forward)

Figure 2-14: Attaching Brackets on the Catalyst 2950G-48-EI Switch in a 24-Inch Rack (Rear Panel Forward)

Figure 2-15: Attaching Brackets on the Catalyst 2950G-48-EI Switch in a 24-Inch Telco Rack

Mounting the Switch in a Rack

After attaching the brackets, use the four Phillips machine screws to securely attach the brackets to the rack, as shown in Figure 2-16.

To prevent the cables from obscuring the switch and other devices in the rack, you can also attach the cable guide to the rack. See the"Attaching the Optional Cable Guide" section for instructions.

Figure 2-16: Mounting the Switch in a Rack

After mounting the switch in the rack, start the terminal-emulation software, and provide power to the switch. See the "Powering On the Switch" section for instructions.

Attaching the Optional Cable Guide

We recommend attaching the cable guide to prevent the cables from obscuring the front panels of the switch and other devices installed in the rack. Use the supplied black Phillips machine screw to attach the cable guide to the left or right bracket, as shown in Figure 2-17.

Figure 2-17: Attaching the Cable Guide

Installing the Switch on a Table, Shelf, or Desk

Before placing the switch on a table, shelf, or desk, locate the adhesive strip with rubber feet in the mounting-kit envelope, and attach four rubber feet to the recessed areas on the switch bottom. Place the switch on a table, shelf, or desk near an AC power source or DC-input power source.

Start the terminal-emulation software and provide power to the switch. See the "Powering On the Switch" section for instructions.

Installing the GBIC Modules

Figure 2-18, Figure 2-19, and Figure 2-20 show how to insert a GBIC module in a GBIC module slot on the switch. For instructions about how to install a CWDM GBIC module in a GBIC module slot, refer to the documentation that came with that GBIC module.

For detailed instructions on installing, removing, and cabling the GBIC module (the 1000BASE-X module, the 1000BASE-T module, the CWDM GBIC module, or the GigaStack module), refer to your GBIC documentation.

Caution To prevent electrostatic-discharge (ESD) damage when installing GBIC modules, follow your normal board and component handling procedures.

Figure 2-18: Installing a 1000BASE-X GBIC Module in a Switch

Figure 2-19: Installing a 1000BASE-T GBIC Module in a Switch

Figure 2-20: Installing a GigaStack GBIC Module in a Switch

Powering On the Switch

Before connecting the AC power cord, a DC-input power source, or the Redundant Power System (RPS) to the switch, make sure that you have started the terminal-emulation software (such as ProComm, HyperTerminal, tip, or minicom) from your management station.

If you are using the AC power cord, connect the AC power cord to the AC power connector and to an AC power outlet.

If you are using the DC-input power source, see the "Connecting to DC Power" section for installation instructions.

If you are using an RPS, refer to the documentation that came with your RPS for installation instructions.

Warning Attach only the Cisco RPS 300 (model PWR300-AC-RPS-N1) to the RPS receptacle.

For POST information, see the "Running POST" section.

Connecting to DC Power

To connect the Catalyst 2950G-24-EI-DC switch to a DC-input power source, follow these steps:

Warning The Catalyst 2950G-24-EI-DC contains no field-replaceable units (FRUs). Do not open the chassis or attempt to remove or replace any components. For information about obtaining service for this unit, contact your reseller or Cisco sales representative.

Warning The equipment is to be installed in a restricted access area.

Warning Ethernet cables must be shielded when used in a central office environment.

Preparing for Installation

Locate the DC terminal block plug, the ground lug, and the two number-10-32 screws in the DC-switch kit.

Obtain these necessary tools and equipment:

Ratcheting torque screwdriver with a Phillips head that exerts up to 15 pound-force inches (lbf-in.) of pressure
Panduit crimping tool with optional controlled cycle mechanism (model CT-700, CT-720, CT-920, CT-920CH, CT-930, or CT-940CH)
6-gauge copper ground wire (insulated or noninsulated)
Four leads of 18-gauge copper wire
Wire-stripping tools for stripping 6- and 18-gauge wires

Grounding the Switch

Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.

Warning When installing the unit, always make the ground connection first and disconnect it last.

Caution To make sure that the equipment is reliably connected to earth ground, follow the grounding procedure instructions, and use a UL-listed lug suitable for number-6 AWG wire and two number-10-32 ground-lug screws.

To ground the switch to earth ground, follow these steps. Make sure to follow any grounding requirements at your site.

Step 1 Locate the ground lug and the two number-10-32 screws from the switch rear panel. Use a standard Phillips screwdriver or a ratcheting torque screwdriver with a Phillips head. Set the screws and the ground lug aside.

Step 2 If your ground wire is insulated, use a wire stripping tool to strip the 6-gauge ground wire to 0.5 inch (12.7 millimeter [mm]) ± 0.02 inch (0.5 mm) as shown in Figure 2-21.

Figure 2-21: Stripping the Ground Wire

Step 3 Slide the open end of the ground lug over the exposed area of the 6-gauge wire.

Step 4 Using a Panduit crimping tool, crimp the ground lug to the 6-gauge wire.

Figure 2-22: Crimping the Ground Lug

Step 5 Use the two number-10-32 screws to attach the ground lug and wire assembly to the switch rear panel.

Step 6 Using a ratcheting torque screwdriver, torque each ground-lug screw to 15 lbf-in. (240 ounce-force inches [ozf-in.]).

Figure 2-23: Torquing Ground-Lug Screws

Wiring the DC-Input Power Source

Warning Only trained and qualified personnel should be allowed to install or replace this equipment.

Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.

Caution You must connect the Catalyst 2950G-24-EI-DC switch only to a DC-input power source that has an input supply voltage from -36 to -72 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

Caution The switch must be installed with 5A-branch-circuit protection.

Note This installation must comply with all applicable codes.

To wire the switch to a DC-input power source, follow these steps:

Step 1 Locate the terminal block plug (see Figure 2-24).

Figure 2-24: Terminal Block Plug

Step 2 Identify the positive and negative feed positions for the terminal block connection. The wiring sequence is positive to positive and negative to negative for both the A and the B feed wires. The switch rear panel identifies the positive and negative positions for both the A and B feed wires.

Figure 2-25: Positive and Negative Positions on the Switch Rear Panel

Step 3 Using an 18-gauge wire-stripping tool, strip each of the four wires coming from the DC-input power source to 0.27 inch (6.6 mm) ± 0.02 inch (0.5 mm). Do not strip more than 0.29 inch (7.4 mm) of insulation from the wire. Stripping more than the recommended amount of wire can leave exposed wire from the terminal block plug after installation.

Figure 2-26: Stripping the DC-Input Power Source Wire

Step 4 Insert the exposed wire of one of the four DC-input power source wires into the terminal block plug, as shown in Figure 2-27. Make sure that you cannot see any wire lead. Only wire with insulation should extend from the terminal block.

Warning An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug.

Figure 2-27: Inserting Wires in the Terminal Block Plug

Step 5 Use a ratcheting torque screwdriver to torque the terminal block captive screw (above the installed wire lead) to 4.5 lbf-in. (72 ozf-in.). (See Figure 2-28.)

Caution Do not overtorque the terminal-block captive screws. The recommended maximum torque is 4.5 lbf-in.

Figure 2-28: Torquing the Terminal-Block Captive Screws

Step 6 Repeat Steps 4 and 5 for the remaining three DC-input power source wires. Figure 2-29 shows the completed wiring of a terminal block plug.

Figure 2-29: Completed Wiring of Terminal Block Plug

Step 7 Insert the terminal block plug in the terminal block header on the switch rear panel (see Figure 2-30).

Caution Secure the wires coming in from the terminal block so that they cannot be disturbed by casual contact. For example, use tie wraps to secure the wires to the rack.

Figure 2-30: Inserting the Terminal Block in the Block Header

Step 8 Remove the tape from the circuit-breaker switch handle, and move the circuit-breaker handle to the on position.

Running POST

After the power is connected, the switch automatically begins POST, a series of tests that verifies that the switch functions properly. When the switch begins POST, the system LED is off. If POST completes successfully, the LED turns green. If POST fails, the LED turns amber. See "Troubleshooting," to determine a corrective action.

Note POST failures are usually fatal. Call Cisco Systems immediately if your switch does not pass POST.

Connecting to 10/100 and 10/100/1000 Ports

The 10/100 ports configure themselves to operate at the speed and duplex settings of attached devices.They operate at 10 or 100 Mbps in half- or full-duplex mode. If the attached devices do not support autonegotiation, you can explicitly set the speed and duplex parameters.

The 10/100/1000 ports configure themselves to operate at the speed setting of attached devices.These ports on Catalyst 2950T-24 switches operate at 10, 100, or 1000 Mbps only in full-duplex mode. If the attached devices do not support autonegotiation, you can explicitly set the speed parameter.

Connecting devices that do not autonegotiate or devices with manually set speed and duplex parameters can reduce performance or result in link failures between the devices. To maximize performance, choose one of these methods for configuring the ports:

Let the ports autonegotiate both speed and duplex for 10/100 ports and only speed for 10/100/1000 ports.
Set the speed and duplex parameters on both ends of the connection.

When connecting the ports on the Catalyst 2950G-24-EI-DC switches to other devices, follow these guidelines:

Caution To comply with the intrabuilding lightning surge requirements, intrabuilding wiring must be shielded, and the shield for the wiring must be grounded at both ends.

Caution The Catalyst 2950G-24-EI-DC switch is suitable only for intrabuilding or nonexposed wiring connections.

Follow these steps to connect the switch to 10BASE-T, 100BASE-TX, or 1000BASE-T devices:

Caution To prevent electrostatic-discharge (ESD) damage, follow your normal board and component handling procedures.

Step 1 When connecting to servers, workstations, and routers, insert a twisted-pair straight-through cable in a front-panel RJ-45 connector, as shown in Figure 2-31, Figure 2-32, and Figure 2-33. When connecting to switches or repeaters, insert a twisted-pair crossover cable. (See the "Cable and Adapter Specifications" section for cable-pinout descriptions.)

Note When connecting to 1000BASE-T devices, be sure to use a four twisted-pair, Category 5 cable.

Figure 2-31: Connecting to a Port on Catalyst 2950-12, 2950-24, 2950C-24, 2950SX-24, and 2950T-24 Switches

Figure 2-32: Connecting to a Port on Catalyst 2950G-12-EI, 2950G-24-EI, and 2950G-24-EI-DC Switches

Figure 2-33: Connecting to a Port on Catalyst 2950G-48-EI Switches

Step 2 Insert the other cable end in an RJ-45 connector on the target device.

Step 3 Observe the port status LED.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while Spanning Tree Protocol (STP) discovers the network topology and searches for loops. This process takes about 30 seconds, and then the LED turns green.

If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be a problem with the adapter installed in the target device. See "Troubleshooting," for solutions to cabling problems.

Step 4 Reconfigure and restart the target device if necessary.

Step 5 Repeat Steps 1 through 4 to connect each port.

Connecting to 100BASE-FX and 1000BASE-SX Ports

The 100BASE-FX and 1000BASE-SX ports operate only in full-duplex mode.

You can connect a 100BASE-FX or 1000BASE-SX port to an SC or ST port on another device by using one of the MT-RJ fiber-optic patch cables listed in Table 2-1. Use the Cisco part numbers in Table 2-1 to order the patch cables that you need.

Follow these steps to connect the switch to a 100BASE-FX or 1000BASE-SX device:

Caution Do not remove the dust plugs from the fiber-optic ports or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the fiber-optic ports and cables from contamination and ambient light.

Step 1 Remove the dust plugs from the 100BASE-FX or 1000BASE-SX port and the rubber caps from the MT-RJ patch cable. Store them for future use.

Step 2 Insert the cable in a 100BASE-FX or 1000BASE-SX port. (See Figure 2-34.)

Figure 2-34: Connecting to a 100BASE-FX or 1000BASE-SX Port

Step 3 Insert the other cable end in an SC or ST port on the target device.

Step 4 Observe the port status LED.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

Step 5 Reconfigure and restart the target device if necessary.

Step 6 Repeat Steps 1 through 5 to connect each port.

Connecting to GBIC Module Ports

These sections describe how to connect to a GBIC module port.

For instructions about how to connect to the CWDM GBIC module ports, refer to the documentation that came with that GBIC module.

For detailed instructions about installing, removing, and connecting to the GBIC module (the 1000BASE-X module, the 1000BASE-T module, the CWDM GBIC module, or the GigaStack module), refer to the GBIC documentation.

When connecting the ports on the Catalyst 2950G-24-EI-DC switches to other devices, follow these guidelines:

Caution To comply with the intrabuilding lightning surge requirements, intrabuilding wiring must be shielded, and the shield for the wiring must be grounded at both ends.

Caution The Catalyst 2950G-24-EI-DC switch is suitable only for intrabuilding or nonexposed wiring connections.

Connecting to 1000BASE-X GBIC Module Ports

Caution Do not remove the rubber plugs from the GBIC module port or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the GBIC module ports and cables from contamination and ambient light.

After installing the 1000BASE-X GBIC in the GBIC module slot, follow these steps:

Step 1 Remove the rubber plugs from the GBIC module port, and store them for future use.

Step 2 Insert the SC connector in the fiber-optic receptacle (see Figure 2-35).

Figure 2-35: Connecting to a 1000 BASE-X GBIC Port

Step 3 Insert the other cable end in a fiber-optic receptacle on a target device.

Step 4 Observe the port status LED.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be problem with the adapter installed in the target device. See Chapter 3, "Troubleshooting," for solutions to cabling problems.

Step 5 Reconfigure and restart the switch or target device if necessary.

Connecting to 1000BASE-T GBIC Module Ports

After installing the 1000BASE-T GBIC in the GBIC module slot, follow these steps:

Caution To prevent ESD damage, follow your normal board and component handling procedures.

Step 1 When connecting to servers, workstations, and routers, insert a four twisted-pair, straight-through cable in the RJ-45 connector. When connecting to switches or repeaters, insert a four twisted-pair, crossover cable (see Figure 2-36).

Note When connecting to a 1000BASE-T device, be sure to use a four twisted-pair, Category 5 cable.

Figure 2-36: Connecting to a 1000BASE-T GBIC Port

Step 2 Insert the other cable end in an RJ-45 connector on a target device.

Step 3 Observe the port status LED.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the LED turns green.

If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be a problem with the adapter installed in the target device. See Chapter 3, "Troubleshooting," for solutions to cabling problems.

Step 4 Reconfigure and restart the switch or target device, if necessary.

Connecting to GigaStack GBIC Module Ports

After installing the GigaStack GBIC in the GBIC module slot, follow these steps:

Step 1 Insert the GigaStack cable connector in the GBIC (see Figure 2-37).

Figure 2-37: Connecting to a GigaStack GBIC Port

Step 2 Insert the other cable end in a port on a target device.

Step 3 Observe the port status LED.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

Step 4 Reconfigure and restart the switch or target device, if necessary.

Connecting a PC or a Terminal to the Console Port

If you want to connect a PC to the console port, use the supplied RJ-45-to-DB-9 adapter cable. If you want to connect a terminal to the console port, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) with that adapter from Cisco. For console-port and adapter-pinout information, see the "Cable and Adapter Specifications" section.

The PC or terminal must support VT100 terminal emulation. The terminal-emulation software—frequently a PC application such as HyperTerminal or Procomm Plus—makes communication between the switch and your PC or terminal possible during the setup program.

Follow these steps to connect your PC or terminal to the console port:

Step 1 Make sure that your terminal-emulation software is configured to communicate with the switch through hardware flow control.

Step 2 Configure the baud rate and character format of the PC or terminal to match these console-port default characteristics:

9600 baud
Eight data bits
One stop bit
No parity

After gaining access to the switch, you can change the port baud rate. Refer to the switch software configuration guide for instructions.

Step 3 Insert the adapter cable in the console port, as shown in Figure 2-38, Figure 2-39, and Figure 2-40. (See the "Cable and Adapter Pinouts" section for pinout descriptions.)

Figure 2-38: Connecting to the Console Port

Figure 2-39: Connecting to a Console Port Only on Catalyst 2950G-24-EI-DC Switches

Figure 2-40: Connecting to a Console Port Only on Catalyst 2950G-48-EI Switches

Step 4 Attach the appropriate adapter to the terminal, if needed.

Step 5 Insert the other adapter cable end in the PC or terminal adapter.

Step 6 Start the terminal-emulation software.

Where to Go Next

For information about starting up the switch, refer to the Release Notes for the Catalyst 2950 Switch.

For information about configuring the switch, refer to the switch software configuration guide.

Table of Contents