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The Catalyst 2970 switch—also referred to as the switch—is an Ethernet switch to which you can connect devices like Cisco Wireless Access Point workstations, Cisco IP Phones, and other network devices such as servers, routers, and other switches. This chapter provides a functional overview of the Catalyst 2970 switch. These topics are included:
The Catalyst 2970 switch can be deployed as a backbone switch, aggregating 10BASE-T, 100BASE-TX, and 1000BASE-T Ethernet traffic from other network devices. Refer to the switch software configuration guide for examples showing how you might deploy the switch in your network.
These are the switch features:
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Note When installed in Catalyst 2970 switches, 1000BASE-T SFP modules can operate at 10, 100, or 1000 Mbps in full-duplex mode or at 10 or 100 Mbps in half-duplex mode. |
The 10/100/1000 ports on the Catalyst 2970G-24T switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 2-1. Port 3 is above port 4, and so on.
The 10/100/1000 ports on the Catalyst 2970G-24TS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 2-2. Port 3 is above port 4, and so on. The SFP module slots are numbered 25 to 28.
You can set the 10/100/1000 ports to operate at 10 Mbps, 100 Mbps, or 1000 Mbps in full-duplex mode. You can also set these ports for speed and duplex autonegotiation in compliance with IEEE 802.3AB. (The default setting is autonegotiate.) When set for autonegotiation, the port senses the speed and duplex settings of the attached device and advertises its own capabilities. If the connected device also supports autonegotiation, the switch port negotiates the best connection (that is, the fastest line speed that both devices support and full-duplex transmission if the attached device supports it) and configures itself accordingly. In all cases, the attached device must be within 328 feet (100 meters).
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Note 100BASE-TX and 1000BASE-T traffic requires
Category 5 cable. 10BASE-T traffic can use Category 3
or Category 4 cables. When connecting the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable is a straight-through cable. When connecting the switch to switches or hubs, use a crossover cable. When using a straight-through or crossover cable for 1000BASE-T connections, be sure to use a twisted four-pair, Category 5 cable for proper operation. Pinouts for the cables are described in "Connector and Cable Specifications." |
The SFP module slots support the SFP modules listed in the Catalyst 2970 release notes.
The Catalyst 2970 switch uses Gigabit Ethernet SFP modules to establish fiber-optic connections. These transceiver modules are field-replaceable, providing the uplink interfaces when inserted in an SFP module slot. You can use the SFP modules for Gigabit uplink connections to other switches. You use fiber-optic cables with LC or MT-RJ connectors to connect to a fiber-optic SFP module. You use Category 5 cable with RJ-45 connectors to connect to a copper SFP module.
The Catalyst 2970 models support these Cisco SFP modules:
For more information about these SFP modules, refer to your SFP module documentation.
You can use the switch LEDs to monitor switch activity and its performance. Figure 2-3 shows the switch LEDs and the Mode button that you use to select one of the port modes.
All of the LEDs described in this section are visible in the Cluster Management Suite (CMS). The switch online help describes how to use CMS to configure and monitor individual switches and switch clusters.
The System LED shows whether the system is receiving power and is functioning properly. Table 2-1 lists the LED colors and their meanings.
For information on the System LED colors during the power-on self-test (POST), see the "Connecting to the 10/100/1000 Ports" section.
The RPS LED shows the RPS status. Table 2-2 lists the LED colors and their meanings.
For more information about the Cisco RPS 300, refer to the Cisco RPS 300 Redundant Power System Hardware Installation Guide. For more information about the Cisco RPS 675, refer to the Cisco RPS 675 Redundant Power System Hardware Installation Guide.
Each RJ-45 port and SFP module slot has a port LED. These port LEDs, as a group or individually, display information about the switch and about the individual ports. The port modes determine the type of information displayed through the port LEDs. Table 2-3 lists the mode LEDs and their associated port mode and meaning.
To select or change a mode, press the Mode button until the desired mode is highlighted. When you change port modes, the meanings of the port LED colors also change. Table 2-4 explains how to interpret the port LED colors in different port modes.
Table 2-4 Meaning of LED Colors in Different Modes on the Switch
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The Catalyst 2970G-24T switch rear panel has an AC power connector, an RPS connector, and an RJ-45 console port. (See Figure 2-4.)
The Catalyst 2970G-24TS switch rear panel has an AC power connector, an RPS connector, and an RJ-45 console port. (See Figure 2-5.)
The switch is powered through the internal power supply. You can also connect the Cisco RPS 300 or the Cisco RPS 675 to provide backup power if the switch internal power supply should fail.
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Note The Catalyst 2970 switch and the Cisco RPS 300 or RPS 675 should be connected to the same AC power source. |
The internal power supply is an autoranging unit that supports input voltages between 100 and 240 VAC. Use the supplied AC power cord to connect the AC power connector to an AC power outlet.
These Cisco RPS models support the Catalyst 2970 switches:
The Cisco RPS 300 has two output levels: -48V and 12V, with a total maximum output power of 300W. Use the supplied RPS connector cable to connect the RPS to the switch.
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Warning Attach only the Cisco RPS (model PWR300-AC-RPS-N1) to the RPS receptacle. |
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Note The Cisco RPS 300 is not compatible with the Catalyst 2970G-24TS switch. |
The RPS is a redundant power system that can support six external network devices and provides power to one failed device at a time. It automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic. For more information on the Cisco RPS 300, refer to the Cisco RPS 300 Redundant Power System Hardware Installation Guide.
The Cisco RPS 675 has two output levels: -48V and 12V, with a total maximum output power of 675W. Use the supplied RPS connector cable to connect the RPS to the switch.
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Warning Attach only the Cisco RPS (model PWR675-AC-RPS-N1=) to the RPS receptacle. |
The RPS is a redundant power system that can support six external network devices and provides power to one failed device at a time. It automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic. For more information on the Cisco RPS 675, refer to the Cisco RPS 675 Redundant Power System Hardware Installation Guide.
You can connect the switch to a PC by means of the console port and the supplied RJ-45-to-DB-9 female cable. If you want to connect the switch console port 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=) containing that adapter from Cisco. For console port and adapter pinout information, see the "Connector and Cable Specifications" section.
The Catalyst 2970 switches offer several management options:
CMS is a graphical user interface that can be launched from anywhere in your network through a web browser. CMS is already installed on the switch, and no additional installation is required. From CMS, you can fully configure and monitor a switch or switch clusters, display network topologies to gather link information, and display switch images to modify switch- and port-level settings. For more information, refer to the switch software configuration guide on Cisco.com, and the online help for this application.
You can also find information about CMS in "Managing the Switch by Using the Cluster Management Suite."
The switch CLI is based on Cisco IOS software and is enhanced to support desktop-switching features. You can fully configure and monitor the switch and switch cluster members from the CLI. You can access the CLI either by connecting your management station directly to the switch console port or by using Telnet from a remote management station. Refer to the Catalyst 2970 Switch Command Reference on Cisco.com for more information.
For quick setup instructions that use the CLI, go to "Quick Setup By Using the CLI-Based Setup Program."
The CiscoView device-management application displays the switch image that you can use to set configuration parameters and to view switch status and performance information. The CiscoView application, which you purchase separately, can be a standalone application or part of a Simple Network Management Protocol (SNMP) platform. Refer to the CiscoView documentation for more information.
You can manage switches from a SNMP-compatible management station that is running platforms such as HP OpenView or SunNet Manager. The switch supports a comprehensive set of Management Information Base (MIB) extensions and four Remote Monitoring (RMON) groups. Refer to the switch software configuration guide on Cisco.com and the documentation that came with your SNMP application for more information.
Cisco IE200 Series Configuration Registrar is a network management device that works with embedded 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.
Refer to the switch software configuration guide on Cisco.com for an explanation of network configuration concepts. The software configuration guide also provides examples of network configurations that use the switch to create dedicated network segments that are interconnected through Gigabit Ethernet connections.
Posted: Thu Aug 21 11:20:24 PDT 2003
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