Installation guide

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CHAPTER

1-1

Catalyst 2950 Switch Hardware Installation Guide

OL-6156-01

Overview

This chapter provides information about these topics:

• Setting up the Switch, page 1-1

• Features, page 1-1

• Front-Panel Description, page 1-3

• Rear-Panel Description, page 1-21

• Management Options, page 1-24

Setting up the Switch

See the Catalyst 2950 Switch Getting Started Guide for instructions on initially configuring your

Catalyst switch by using the Express Setup. Also covered in the getting started guide are switch

management options, basic rack-mounting procedures, port and module connections, power connection

procedures for both AC- and DC-powered switches, and troubleshooting help.

For instructions on setting up your switch by using the command-line interface (CLI), see Appendix D,

“Configuring the Switch with the CLI-Based Setup Program.”

Features

The Catalyst 2950 switches are a family of Ethernet switches that you can use to connect workstations

and other network devices, such as servers, routers, and other switches. All models of the switch are

cluster-capable, but only some models are stackable. You can use switches with gigabit interface

converter (GBIC) module slots to create switch stacks by using Gigastack GBICs. Some switch models

can be deployed as backbone switches, aggregating 10BASE-T, 100BASE-TX, Gigabit Ethernet, and

Long-Reach Ethernet (LRE) traffic from other switches and network devices. See the switch software

configuration guide for examples that show how you might deploy the switches in your network.

Figure 1-1 through Figure 1-12 show the Catalyst 2950 switches.

These are the switch features:

• Hardware

–

Catalyst 2950-12 switch—12 10/100 Ethernet ports

–

Catalyst 2950-24 switch—24 10/100 Ethernet ports

–

Catalyst 2950C-24 switch—24 10/100 Ethernet ports and 2 100BASE-FX ports

Summary of content (26 pages)

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C H A P T E R 1 Overview This chapter provides information about these topics: • Setting up the Switch, page 1-1 • Features, page 1-1 • Front-Panel Description, page 1-3 • Rear-Panel Description, page 1-21 • Management Options, page 1-24 Setting up the Switch See the Catalyst 2950 Switch Getting Started Guide for instructions on initially configuring your Catalyst switch by using the Express Setup.
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Chapter 1 Overview Features – Catalyst 2950G-12-EI—12 10/100 Ethernet ports and 2 GBIC module slots – Catalyst 2950G-24-EI—24 10/100 Ethernet ports and 2 GBIC module slots – Catalyst 2950G-24-EI-DC—24 10/100 Ethernet ports and 2 GBIC module slots with DC-input power – Catalyst 2950G-48-EI—48 10/100 Ethernet ports and 2 GBIC module slots – Catalyst 2950ST-8 LRE switch—8 LRE ports, 2 10/100/1000 Ethernet ports, and 2 small-form-factor pluggable (SFP) module slots.
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Chapter 1 Overview Front-Panel Description Power redundancy • – Connection for an optional Cisco RPS 300 redundant power system (RPS) that uses AC input and supplies DC output to the switch – Connection for an optional Cisco RPS 675 that uses AC input and supplies DC output to the switch Certain Cisco LRE customer premises equipment (CPE) devices are not supported by certain Catalyst 2950 LRE switches.
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Chapter 1 Overview Front-Panel Description SYST 1 RPS STAT UTIL DUPLX 2 Catalyst 2950-24 Switch 3 4x 5x 6x SPEED 7x 8x 9x MODE 10Base-T 10x / 100Base- TX 11x 12x 13x 14x 15x 16x 17x 18x 19x 20x Catalyst 295 21x 0 SERIES 22x 23x 45567 Figure 1-2 24x 10/100 ports SYST 1x RPS STAT UTIL DUPLX 2x Catalyst 2950C-24 Switch 3x 4x 5x 6x SPEED 7x 8x 9x MODE 10BASE-T 10x / 100BASE -TX 11x 12x 13x 14x 15x 16x 17x 18x 19x 20x Catalyst 295 21x 0 SERIES
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Chapter 1 Overview Front-Panel Description 1 SYST 2 3 4 Catalyst 2950G-24-EI-DC Switch 5 1X 6 7 RPS STAT UTIL DUPLX 8 9 10 11 12 SPEED 13 11X 14 15 16 13X 17 18 MODE 19 20 21 2X 22 23 60977 Figure 1-6 24 23X 12X Catalyst 295 14X 0 SERIES 1 24X 2 10/100 ports GBIC module slots 1 2 SYST RPS 3 1X 4 5 Catalyst 2950G-48-EI Switch 6 7 8 9 STAT 10 11 UTIL 12 13 14 15 DUPLX 16 17 SPEED MODE 15X 17X 16X 18X 2X 18 19 20 21 22 23 24 25 2
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Chapter 1 Overview Front-Panel Description Figure 1-9 Catalyst 2950ST-24 LRE Switch Power connector LRE port 1 2 3 4 5 SYST 6 7 CONSOLE RPS RATING 100-127 /200-240V~ 1.0A/0.
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Chapter 1 Overview Front-Panel Description SYST 1x RPS STAT UTIL DUPLX 2x 3x 4x 5x 6x SPEED 7x 8x 9x MODE 10Base-T 10x / 100Base- TX 11x 12x 13x 14x 15x 16x 17x 18x 19x Catalyst 295 20x 0 SERIES 21x 22x 23x 24x 10/100/1 47337 Figure 1-12 Catalyst 2950T-24 Switch 00Base-T 1 2 10/100 ports 10/100/1000 ports 1 SYST RPS 2 3 4 1X 5 6 7 8 STAT 9 10 11 UTIL 12 13 14 15 DUPLX 16 17 SPEED MODE 97630 Figure 1-13 Catalyst 2950SX-48-SI Switch 15X 17X
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Chapter 1 Overview Front-Panel Description Note When connecting the switch to workstations, servers, and routers, be sure that the cable is a twisted-pair straight-through cable. When connecting the switch to hubs or other switches, use a twisted-pair crossover cable. Pinouts for the cables are described in Appendix B, “Connectors and Cables.” For information on how to identify a crossover cable, go to the “Identifying a Crossover Cable” section on page B-5.
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Chapter 1 Overview Front-Panel Description Note On the Catalyst 2950 LRE switches, the four input uplink ports are bundled as two logical ports, each consisting of a copper 10/100/1000 port and a fiber-optic SFP module slot, respectively. Within each logical port, you can use only the copper or the fiber-optic port at one time.
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Chapter 1 Overview Front-Panel Description For limitations and restrictions when you use a POTS splitter with the Catalyst 2950 LRE switches and Cisco LRE CPE, see the “Limitations and Restrictions with POTS Splitters” section on page 2-31. If the installation does not have a PBX, a certified, homologated POTS splitter is required to connect directly to the PSTN. For more information about homologated POTS splitters, contact your Cisco sales representative.
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Chapter 1 Overview Front-Panel Description SFP Module Slots On the Catalyst 2950 LRE switch, the SFP module slots support the SFP modules listed in the Catalyst 2950 LRE switch release notes. The Catalyst 2950 LRE switch has four physical input ports that are logically bundled as two ports. Each logical port consists of a copper 10/100/1000 port and a fiber-optic SFP module slot. These ports appear as a vertical column on the front panel and are labeled Uplink Port 1 and Uplink Port 2.
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Chapter 1 Overview Front-Panel Description Table 1-2 Fiber-Optic SFP Module Port Cabling Specifications Core Size (micron) Modal Bandwidth (MHz/km) Cable Distance MMF 62.5 62.5 50 50 160 200 400 500 722 feet (220 m) 902 feet (275 m) 1640 feet (500 m) 1804 feet (550 m) MMF1 62.5 50 50 9/10 500 400 500 — 1804 feet (550 m) 1804 feet (550 m) 1804 feet (550 m) 32,810 feet (10 km) 9/10 — 43.
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Chapter 1 Overview Front-Panel Description LEDs You can use the LEDs to monitor switch activity and performance. The locations and numbers of the LEDs vary among switch models. The location of the Mode button that you use to select the port mode also varies by model.
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Chapter 1 Overview Front-Panel Description Figure 1-16 LEDs on Catalyst 2950G-12-EI, 2950G-24-EI, and 2950G-24-EI-DC Switches RPS LED Port status LEDs System LED 1 SYST 2 3 4 5 1X 6 RPS STAT UTIL D UPLX 8 9 10 11 12 SPEED 11X MODE 2X 12X Mode button 65395 Port mode LEDs 7 Figure 1-17 LEDs on Catalyst 2950G-48-EI, 2950SX-48-SI, and 2950T-48-SI Switches Port status LEDs System LED Port mode LEDs 1 SYST RPS 1X STAT UTIL DUPLX 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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Chapter 1 Overview Front-Panel Description Figure 1-18 LEDs on Catalyst 2950ST-8 LRE and 2950ST-24 LRE Switches System LED Redundant power system LED Port status LEDs 1 SYST 3 4 5 6 CONSO 7 LE RPS RATING 100-127/ 200-240V ~ 1.0A/0.
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Chapter 1 Overview Front-Panel Description System LED The system LED shows whether the system is receiving power and functioning properly. Table 1-3 lists the LED colors and meanings. Table 1-3 System LED Color System Status Off System is not powered up. Green System is operating normally. Amber System is receiving power but is not functioning properly. For information about the system LED colors during the power-on self-test (POST), see the “Connecting to a Power Source” section on page D-5.
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Chapter 1 Overview Front-Panel Description Table 1-5 Port Mode LEDs Mode LED Port Mode Description STAT Port status The port status. This is the default mode. Switch utilization The bandwidth in use by the switch. DUPLX Port duplex mode The port duplex mode: half duplex or full duplex. SPEED Port speed The port operating speed: 10 or 100 Mbps for 10/100 ports and 10, 100, or 1000 Mbps for 10/100/1000 ports. UTIL 1 1. A Catalyst 2950 LRE switch does not have a UTIL or a DUPLX LED.
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Chapter 1 Overview Front-Panel Description Table 1-6 Meaning of Port LED Colors in Different Modes for Non-LRE Switches (continued) Port Mode Color SPEED 10/100 ports Meaning Off Port is operating at 10 Mbps. Green Port is operating at 100 Mbps. 10/100/1000 ports Off Port is operating at 10 Mbps. Green Port is operating at 100 Mbps. Flashing green Port is operating at 1000 Mbps. 1000BASE-X GBIC module ports Table 1-7 Off Port is not operating. Green Port is operating at 1000 Mbps.
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Chapter 1 Overview Front-Panel Description Table 1-7 Meaning of Port LED Colors in Different Modes for the LRE Switches (continued) Port Mode Color Meaning SPEED 10/100/1000 ports1 2 Off Port is operating at 10 Mbps. Green Port is operating at 100 Mbps. Flashing green Port is operating at 1000 Mbps. SFP modules1 2 Off Port is operating at 10 Mbps Green Port is operating at 100 Mbps Flashing green Port is operating at 1000 Mbps 1.
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Chapter 1 Overview Front-Panel Description Figure 1-21 Bandwidth Utilization on Catalyst 2950-24, 2950C-24, 2950SX-24, and 2950T-24 Switches Catalyst 2950 SERIES 10Base-T / 100Base-TX 1x 3x 4x 5x 6x 7x 8x 9x 10x 11x 12x 13x 100Base-FX 14x 15x 16x 17x 18x 19x 20x 21x 22x 23x 24x 25x RPS 26x 74725 SYST STAT 2x UTIL DUPLX SPEED MODE 0–0.0487%+ 6.25–12.4%+ 12.
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Chapter 1 Overview Rear-Panel Description Figure 1-24 Bandwidth Utilization on Catalyst 2950G-48-EI, 2950SX-48-SI, and 2950T-48-SI Switches Catalyst 2950 1 2 3 24 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 31 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 1X 15X 17X 31X 33X 47X 2X 16X 18X 32X 34X 48X 2 MODE 65510 1 SYST RPS STAT UTIL DUPLX SPEED < 25% + 25% – 49% + 50% + Rear-Panel Description Other than the Catalyst 2950G-24
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Chapter 1 Overview Rear-Panel Description Figure 1-27 Catalyst 2950G-24-EI-DC Switch Rear Panel A B DC INPUT FO POWE R REMOTE SPECIF R SUPPLY IED IN +12V @4MANUAL. .5A 65291 36 - 72V 1 - 0.
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Chapter 1 Overview Rear-Panel Description • CAB-NP1200-AC-IT= • CAB-NP1200-AC-JP= • CAB-NP1200-AC-UK= • CAB-NP1200-AC-US= DC Power Connector The Catalyst 2950G-24-EI-DC and Catalyst 2950ST-24 LRE 997 switches have an internal DC-power converter. It has dual feeds (A and B) that are diode-OR-ed into a single power block. For installation instructions, see Appendix C, “Connecting to DC Power.
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Chapter 1 Overview Management Options Console Port You can connect a switch to a PC through the console port and the supplied RJ-45-to-DB-9 adapter cable. If you want to connect a switch to a terminal, 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 on page B-6.
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Chapter 1 Overview Management Options • Cisco Intelligence Engine 2100 (IE2100) The Cisco IE200 Series Configuration Registrar is a network management device that works with embedded Cisco Networking Services (CNS) agents in the switch software. You can automate initial configurations and configuration updates by generating switch-specific configuration changes, sending them to the switch, executing the configuration change, and logging the results.
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Chapter 1 Overview Management Options Catalyst 2950 Switch Hardware Installation Guide 1-26 OL-6156-01