Table of Contents

Switch Features
Switch Components

Management Ports

Console Serial Port
RJ-45 10BaseT Port

Front Panel LEDs
Fan Assembly
Power Supplies

Product Overview

This chapter provides an overview of the features and components of the Catalyst 2948G and 2980G switches.

This chapter contains these sections:

• Switch Features

• Switch Components

Switch Features

The Catalyst 2948G switch (see Figure 1-1) and Catalyst 2980G switch (see Figure 1-2) are designed for high-performance, high-density, wiring-closet applications.

A GBIC is a hot-swappable input/output device that plugs into the Gigabit Ethernet port module, linking the port module with the fiber-optic network. For a detailed description of Gigabit Ethernet ports see the "GBIC Features" section. The following GBIC media types are supported on the Catalyst 2948G and 2980G switches:

Table 1-1 describes the Catalyst 2948G and 2980G switch features.

Table 1-1: Catalyst 2948G and 2980G Switch Features

Feature	Description
Ethernet speeds	Ethernet (10BaseT) interface to workstations and repeaters Fast Ethernet (100BaseT) interface to workstations, servers, switches, and routers Note Autonegotiation of link speed on each 10/100 port allows migration to 100BaseT from a 10BaseT installed base. Gigabit Ethernet (1000BaseX) interface for backbone interconnection of high-performance switches and routers
Standard management and support features	Layer 2 forwarding with an aggregate forwarding rate of greater than 17.8 million packets per second 16,000 MAC addresses per system Up to 1,024 VLANs with IEEE 802.1Q VLAN tagging on all ports and support for VLAN Trunk Protocol (VTP) Port aggregation using Port Aggregation Protocol (PAgP) for 100-Mbps and 1000-Mbps EtherChannel
Software management features	CLI1 and SNMP interfaces consistent with the Catalyst 4000 and 5000 family switches Compatible development of new features with the Catalyst 5000 family switches Out-of-band management through the RJ-45, 10BaseT console port 10BaseT out-of-band management and in-band management through any switch port with SNMP, Telnet client, and TFTP
Software management features (continued)	RMON2 with RMON 1 Standard Layer 2 features: 802.1D Spanning Tree CDP3 VTP4 version 2 with pruning extensions CGMP5 client
Embedded management features	Full SNMP implementation, including entity-MIB, all relevant standard MIBs, and all relevant Cisco MIBs The first four RMON groups (Ethernet statistics, Alarms, Events, and History) supported on a per port basis without an optional RMON processing module Redirection of traffic from any port to a "sniff" port. Any switching port can be designated as a "sniff" port. Performance management information
Power supplies	120W AC internal power supply on the Catalyst 2948G switch 175W AC internal power supply on the Catalyst 2980G switch

1CLI = command-line interface 2RMON = Remote Monitoring 3CDP = Cisco Discovery Protocol 4VTP = Virtual Terminal Protocol 5CGMP = Cisco Group Management Protocol

Switch Components

This section describes the following Catalyst 2948G and 2980G switch components:

• Management Ports

• Front Panel LEDs

• Fan Assembly

• Power Supplies

Management Ports

The following sections describe the management ports on the Catalyst 2948G and 2980G switches.

Console Serial Port

An RJ-45 console serial port allows you to perform switch-management functions using a terminal. See "Specifications," for the console connector pinout table.

RJ-45 10BaseT Port

An RJ-45 10BaseT port allows you to perform TCP/IP switch-management functions (Telnet, SNMP, FTP). You can configure IP addresses with BOOTP and download software images on this port.

Note This port is for network management only, not switching. There is no connectivity between this port and the 10/100BaseT switching ports.

Front Panel LEDs

The LEDs on the front panels of the Catalyst 2948G and 2980G switches perform the following functions:

• STATUS LEDs indicate the operating state of the switches.

• Link status LEDs provide 10BaseT management and switching port status.

• PS1 LED indicates the internal power supply status on the Catalyst 2948G switch.

• PWR LED indicates the internal power supply status on the Catalyst 2980G switch.

• RPSU LED provides the external redundant power supply unit status on the Catalyst 2948G switch.

The top ports of the Catalyst 2948G switch are odd-numbered ports (1 through 47) and the bottom ports are even-numbered ports (2 through 48).

The Catalyst 2980G switch ports are configured in four rows. The top two rows are numbered 1-48 with the first row odd-numbered (1-47) and the second row even-numbered (2-48). The bottom two rows are numbered 1-32 with the first row odd-numbered (1-31) and the second row even-numbered (2-32).

The 10/100BaseT ports are configured in vertical pairs. Each vertical pair of 10/100BaseT ports has two link status LEDs below it. The LED on the left is for the top port, and the LED on the right is for the bottom port. For example, LED 1 is for the upper port (port 1) and LED 2 is for the bottom port (port 2).

Two Gigabit Ethernet ports are at the far right of the front panel on both the Catalyst 2948G and 2980G switches:

• On the Catalyst 2948G switch, port 49 is the top port and port 50 is the bottom port. The two link status LEDs for these ports are below port 50.

• On the Catalyst 2980G switch, port 33 is the left port and port 34 is the right port. The two link status LEDs for these ports are below each port.

Table 1-2 describes the LEDs.

Table 1-2: Front Panel LEDs

LED	Color	Description
STATUS		Indicates the results of a series of self-test diagnostics.
	Green Red Orange Off	All tests pass. A test other than an individual port test fails. System boot or diagnostic tests in progress. Switch is disabled.
Link Status		Indicates the link status of a port.
	Green Orange Flashing orange Off	Port is operational. Port is disabled by user. Power-on self-test indicates faulty port. No signal detected, or link configuration failure.
PS1, PWR, and RPSU		Indicates power supply operation or failure.
	Green Orange	Switch is operational. Switch failed.

Fan Assembly

Note For environmental specifications, see "Site Planning."

The system fan assembly provides cooling air for the internal chassis components. The fans exhaust air from one side and draw in fresh air on the other side.

Figure 1-3 shows the direction of air flow through the Catalyst 2948G switch. Figure 1-4 shows the direction of air flow through the Catalyst 2980G switch.

Power Supplies

Note For complete power specifications for the Catalyst 2948G and 2980G switches, see "Specifications."

The Catalyst 2948G switch has a 120W AC internal power supply. The Catalyst 2980G switch has a 175W AC internal power supply. The Catalyst 2948G switch can also be used with an external redundant power supply unit (RPSU). To order an RPSU, consult the Cisco Product Catalog.

Each power supply has an individual power cord and has status LEDs (PS1 and RPSU). There is no power switch on the switches; AC power is present in the power supply when the power cord is plugged in.

The RPSU contains redundant power supplies. If one of the power supplies in the RPSU fails, the RPSU will automatically switch over to the other power supply without causing the switch to reboot.

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Note When using the RPSU, only one power source can be supplying power to the switch. If you are using the RPSU, unplug the local power cord for the switch. If you are using the local power supply, the RPSU can be connected but must not be powered on.

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The environmental monitoring and reporting functions allow you to maintain normal system operation by correcting adverse environmental conditions before loss of operation.

Each power supply monitors its own temperature and output voltages. If excessive internal temperature occurs, the power supplies shut down to prevent damage. The switches monitor the operating condition of the power supply and report the status using the switch software.

Posted: Fri Mar 31 10:24:46 PST 2000
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