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This chapter describes how to install your Catalyst 2950 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:
This section provides information about these topics:
These warnings are translated into several languages in “Translated Safety Warnings.”
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Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
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Warning Read the installation instructions before you connect the system to its power source. |
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Warning Unplug the power cord before you work on a system that does not have an on/off switch. |
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Warning Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage. |
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Warning The device is designed to work with TN power systems. |
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Warning When installing the unit, always make the ground connection first and disconnect it last. |
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Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. |
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Warning Care must be given to connecting units to the supply circuit so that wiring is not overloaded. |
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Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
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Warning Ultimate disposal of this product should be handled according to all national laws and regulations. |
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Warning Attach only the Cisco RPS (model PWR300-AC-RPS-N1) to the RPS receptacle. |
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Warning Class 1 laser product |
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Warning Avoid exposure to the laser beam. |
This section includes specific regulatory statements about the Catalyst 2950 switches.
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.
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.
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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.
When determining where to place the switch, observe these guidelines. (See “Technical Specifications.” for detailed specifications.)
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Note If the switch is installed in a closed or multirack assembly, the temperature around it might be greater than normal room temperature. |
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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. |
Your Catalyst 2950 switch is shipped with these items:
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Note The DC-switch kit ships only with the Catalyst 2950G-24-EI-DC switch. |
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 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.
| Type | Cisco Part Number |
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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 |
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Note Figure 2-1 to Figure 2-14 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:
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:
Figure 2-1 to Figure 2-12 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.
After attaching the brackets, use the four Phillips machine screws to securely attach the brackets to the rack. Figure 2-13 shows how to mount a switch in a rack.
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.
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.
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 2-14.
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.
Before connecting the AC power cord, a DC-input power source, or the 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 Cisco RPS 300 Redundant Power System Hardware Installation Guide for installation instructions.
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Warning Attach only the Cisco RPS 300 (model PWR300-AC-RPS-N1) to the RPS receptacle. |
For POST information, see the “Running POST” section.
To connect the Catalyst 2950G-24-EI-DC switch to a DC-input power source, follow these steps:
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Warning The customer 48 volt power system must provide reinforced insulation between the primary AC power and the 48 VDC output. |
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Warning The Catalyst 2950G-24-EI-DC switch is intended for Local Area Network (LAN) connections only. This unit is not certified for use in Public Telephone Networks. |
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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. |
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Warning The equipment is to be connected to a UL Listed, limited power source. |
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Warning Connect the equipment to a single, extra-low voltage (SELV) source. |
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Warning The equipment is to be installed in a restricted access area. |
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Warning Ethernet cables must be shielded when used in a central office environment. |
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:
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Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. |
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Warning When installing the unit, always make the ground connection first and disconnect it last. |
To ground the switch to earth ground, follow these steps. Make sure to follow any grounding requirements at your site.
Step 2 If your ground wire is insulated, use a wire stripping tool to strip the 6-gauge ground wire to 0.5 inch ± 0.02 inch as shown in Figure 2-15.
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.
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.]).
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Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
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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. |
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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. |
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Caution The switch must be installed with 5A-branch-circuit protection. |
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Note This installation must comply with all applicable codes. |
To wire the switch to a DC-input power source, follow these steps:
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.
Step 3 Using a 12- or 14-gauge wire-stripping tool, strip each of the four wires coming from the DC-input power source to 0.27 inch ± 0.02 inch. Do not strip more than 0.29 inch of insulation from the wire. Stripping more than the recommended amount of wire can leave exposed wire from the terminal block plug after installation.
Step 4 Insert the exposed wire of one of the four DC-input power source wires into the terminal block plug. Make sure that you cannot see any wire lead. Only wire with insulation should extend from the terminal block.
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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. |
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 2-22.)
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Caution Do not overtorque the terminal-block captive screws. The recommended maximum torque is 4.5 lbf-in. |
Step 6 Repeat Steps 4 and 5 for the remaining three DC-input power source wires. Figure 2-23 shows the completed wiring of a terminal block plug.
Step 7 Insert the terminal block plug in the terminal block header on the switch rear panel (see Figure 2-24).
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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. |
Step 8 Remove the tape from the circuit-breaker switch handle, and move the circuit-breaker handle to the on position.
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.
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Note POST failures are usually fatal. Call Cisco Systems immediately if your switch does not pass POST. |
The 10/100 and 10/100/1000 ports configure themselves to operate at the speed and duplex settings of attached devices. If the attached devices do not support autonegotiation, you can explicitly set the speed and duplex parameters.
The 10/100 ports operate at 10 or 100 Mbps in half- or full-duplex mode.
The 10/100/1000 ports on Catalyst 2950T-24 switches operate at 10 or 100 Mbps in half- or full-duplex mode and at 1000 Mbps in full-duplex mode.
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:
Follow these steps to connect the switch to 10BASE-T, 100BASE-TX, or 1000BASE-T devices:
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Caution To prevent electrostatic-discharge (ESD) damage, follow your normal board and component handling procedures. |
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Note When connecting to 1000BASE-T-compatible devices, be sure to use a four twisted-pair, Category 5 cable. |
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 reboot the target device if necessary.
Step 5 Repeat Steps 1 through 4 to connect each port.
The 100BASE-FX ports only operate at 100 Mbps and full-duplex mode.
You can connect a 100BASE-FX port to an SC or ST port on a compatible 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 device:
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Caution Do not remove the rubber 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 2 Insert the cable in a 100BASE-FX port. (See Figure 2-28.)
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.
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 5 Reconfigure and reboot the target device if necessary.
Step 6 Repeat Steps 1 through 5 to connect each port.
To connect the GBIC module ports to attached devices, follow these steps. For detailed instructions about installing, removing, and cabling a GBIC
(a 1000BASE-X module or a GigaStack module), refer to your GBIC documentation.
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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 2 Insert the SC connector in the fiber-optic receptacle (see Figure 2-29).
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 a 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 reboot the switch or target device if necessary.
After installing the GigaStack GBIC in the GBIC module slot, follow these steps:
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.
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 reboot the switch or target device if necessary.
If you want to connect a PC to the console port, use the supplied rollover cable and RJ-45-to-DB-9 adapter. 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 2 Configure the baud rate and character format of the PC or terminal to match these console-port default characteristics:
After gaining access to the switch, you can change the port baud rate. Refer to the Catalyst 2950 Desktop Switch Software Configuration Guide for instructions.
Step 3 Insert the rollover cable in the console port, as shown in Figure 2-31, Figure 2-32, and Figure 2-33. (See the “Identifying a Rollover Cable” section for a pinout description.)
Step 4 Attach the DB-9 adapter to a PC, or attach an appropriate adapter to the terminal.
Step 5 Insert the other cable end in the attached adapter.
Step 6 Boot the terminal-emulation software.
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 Catalyst 2950 Desktop Switch Software Configuration Guide.
Posted: Thu Feb 28 11:41:44 PST 2002
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