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This chapter provides the following topics that describe the Catalyst 2900 series XL switches, hereafter referred to as the switches.
The switches are stackable 10/100 Ethernet switches to which you can connect workstations, Cisco IP Phones, and other network devices such as servers, routers, and other switches. The 2900 XL LRE switches employ Long-Reach Ethernet (LRE), a very-high-data-rate digital subscriber line (VDSL)-based technology that allows an Ethernet network to reach distances up to 4921 feet (1500 meters). The switches can be deployed as backbone switches, aggregating 10/100 and Gigabit Ethernet traffic from other network devices.
The Catalyst 2900 XL switches have these features:
Figure 1-1 shows the switch models.
The Catalyst 2900 XL and Catalyst 3500 XL switches are designed for plug-and-play operation: you only need to assign basic IP information to the switch and connect it to the other devices in your network. If you have specific network needs, you can configure and monitor the switch—on an individual basis or as part of a switch cluster—through its various management interfaces.
You can configure and monitor individual switches and switch clusters by using the following interfaces:
You can manage the switch from an SNMP-compatible management station that is running platforms such as HP OpenView or SunNet Manager. The switch supports a comprehensive set of MIB extensions and four Remote Monitoring (RMON) groups.
For more information about CMS, the CLI, and SNMP refer to the Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide.
Depending on the model, the switch front panels can have up to 24 10/100 ports (See Figure 1-2), up to 12 100BASE-FX ports (See Figure 1-2), 2 expansion slots (see Figure 1-2), and up to 24 Long-Reach Ethernet ports (See Figure 1-4). All switches have a set of LEDs and a Mode button. This section describes these front-panel components.
The 10/100 switch ports (see Figure 1-2 and Figure 1-4) can connect to any compatible network device up to 328 feet (100 meters) away:
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Note A Category 5 cable is required for 100BASE-TX traffic. A port operating at
10BASE-T can use Category 3 and 4 cables. When connecting the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable is a straight-through, twisted-pair cable. When connecting the switch to switches or hubs, use a crossover cable. Pinouts for the cables are described in "Connectors and Cable Specifications." |
The 10/100 switch ports can be explicitly set to operate in any combination of half duplex, full duplex, 10 Mbps, or 100 Mbps. These ports also can be set for speed and duplex autonegotiation, compliant with IEEE 802.3u. 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.
The 10/100 ports on the Catalyst 2900 XL switches provide protocol support for Cisco IP Phones and per-port priority override. Refer to the Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide for more information about these features.
Cisco IP Phones—connected to the 10/100 port—must be connected to an AC power source. Unlike the 3524-PWR XL switch, the Catalyst 2900 XL switches do not provide inline power.
For more info on the Catalyst 3524-PWR XL switch, refer to the Catalyst 3500 Series XL Hardware Installation Guide.
The 100BASE-FX ports use 10/125- or 62.5/125-micron multimode fiber-optic cabling. The connection distances between the switch and the attached device can be as follows:
The Long-Reach Ethernet (LRE) ports (Figure 1-4) use one RJ-21 connector to connect up to 24 Cisco 575 LRE customer premises equipment (CPE) devices though unstructured wiring, such as existing telephone lines. The link between the LRE switch port and each CPE device can reach speeds of up to 15 Mbps (full duplex) and distances of up to 4921 feet (1500 meters).
The default mode for each LRE port is speed autonegotiation, half duplex operation. For information about configuring the LRE ports, refer to the Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide.
For more information about the Cisco 575 LRE CPE, refer to the Cisco 575 LRE CPE Hardware Installation Guide.
If telephone services, such as voice or integrated services digital network (ISDN), use the same cabling as LRE traffic, the LRE port must be connected to the patch panel through a basic telephone service, also known as plain old telephone service (POTS) splitter. The splitter routes LRE data (high-frequency) and voice (low-frequency) traffic from the telephone line to the switch and private branch exchange (PBX) switch or public-switched telephone network (PSTN)
If the other telephone services are connected through a private branch exchange (PBX) switch, a Cisco LRE 48 POTS Splitter can be used. The PBX routes voice traffic to private telephone networks and the public system telephone network (PSTN). For more information about the Cisco LRE 48 POTS Splitter (PS-1M-LRE-48), refer to the Installation Notes for the Cisco LRE 48 POTS Splitter.
If the installation does not have a PBX, a homologated POTS splitter is required to directly connect to the PSTN. For more information about homologated POTS splitters, contact your Cisco sales representative.
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Note If a connection to a phone network is not required at all, a splitter is not needed, and the switch can connect directly to the patch panel. |
The expansion slots (see Figure 1-2) are for the Catalyst 2900 XL hot-swappable modules. Each module port is internally switched to other switch ports and is managed through the switch management interfaces.
Table 1-1 lists the modules that the expansion slots support.
| Module Type | Model Number |
|---|---|
| 1Accommodates modules WS-G5484 =, WS-G5486 =, and WS-X3500-XL= |
These modules automatically configure themselves when you insert them in expansion slots and tighten the thumb screws. A power-on self-test (POST) verifies that the module is working properly before it starts forwarding packets.
Modules WS-X2914-XL and WS-X2922-XL support 2048 MAC addresses. If you install one of these modules in a 2924M XL or Catalyst 2912MF XL switch (both supporting 8192 MAC addresses), the module fails POST. You can start the module by restarting the switch with the module installed. After the restart, the switch address capacity is reduced to 2048 MAC addresses.
See the Catalyst 2900 Series XL Modules Installation Guide and the Catalyst 2900 Series XL ATM Modules Installation and Configuration Guide for detailed information on expansion modules for Catalyst 2900 series XL switches.
You can use the switch LEDs to monitor switch activity and its performance. Figure 1-5, Figure 1-6, and Figure 1-7 show the location of the LEDs and the Mode button that you use to select a port mode. Changing a port mode changes the information provided by each port LED.
All of the LEDs described in this section except the utilization meter (UTL) are visible on the Cluster Management Suite (CMS) window and, if the switch is a cluster member, on the CMS Cluster Manager window. The Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide describes how to use CMS to manage standalone or individual switches and how to use cluster management software to manage switch clusters].
The system LED shows whether the system is receiving power and functioning properly. Table 1-2 lists the LED colors and their meanings.
| Color | System Status |
|---|---|
For information on the System LED colors during POST, see the "Powering On the Switch and Running POST" section.
The Catalyst 2912 LRE XL, Catalyst 2924 LRE XL, and Catalyst 3524-PWR XL switches use the Cisco RPS 300 (model PWR300-AC-RPS-N1). All other Catalyst 2900 XL and Catalyst 3500 XL switches use the Cisco RPS 600 (model PWR600-AC-RPS). Refer to the appropriate switch documentation for redundant power system (RPS) descriptions specific for the switch. Table 1-3 and Table 1-4 list the RPS LED colors and their meanings.
Table 1-3 RPS LED on the Catalyst 2912 XL, 2924C XL, 2924 XL, 2924MF XL, and 2924M XL Switches
| Color | RPS Status |
|---|---|
The RPS and the switch AC power supply are both powered up. If the switch power supply fails, the switch powers down and after 15 seconds restarts, using power from the RPS. The switch goes through its normal boot sequence when it restarts. Note This is not a recommended configuration. For more information see the "Cisco RPS Connector" section. |
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Table 1-4 RPS LED on the Catalyst 2912 LRE XL and 2924 LRE XL Switches
| Color | RPS Status |
|---|---|
Internal power supply of the switch is down, and redundancy is lost. The switch is operating on the RPS. |
Each of the 10/100, 100BASE-FX, and LRE ports and module slots have a port LED. These port LEDs, as a group or individually, display information about the switch and about the individual ports. The port modes (Table 1-5 and Table 1-6) determine the type of information displayed.
To select or change a mode, press the Mode button until the desired mode is highlighted. When you change port modes, the meaning of the port LED colors also changes. Table 1-7and Table 1-8 list the port LED colors.
Table 1-5 Port Mode LEDs on the Catalyst 2912 XL, 2924C XL, 2924 XL, 2924MF XL, and 2924M XL Switches
| Mode LED | Port Mode | Description |
|---|---|---|
The current bandwidth in use by the switch. (See Figure 1-7.) |
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Table 1-6 Meanings of Port Status LED Colors for Different Modes on Catalyst 2912 LRE XL and 2924 LRE XL Switches
Table 1-7 Meanings of Port Status LED Colors for Different Modes on Catalyst 2912 XL, 2924C XL, 2924 XL, 2924MF XL, and 2924M XL Switches
| Port Mode | Port LED Color | Meaning |
|---|---|---|
Link fault. Error frames can affect connectivity, and errors such as excessive collisions, CRC errors, and alignment and jabber errors are monitored for a link-fault indication. |
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Port is not forwarding. Port was disabled by management or an address violation or was blocked by Spanning Tree Protocol (STP). Note After a port is reconfigured, the port LED can remain amber for up to 30 seconds as STP checks the switch for possible loops. |
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The LEDs display backplane utilization on a logarithmic scale. If all port LEDs are green, the switch is using 50 percent or more of its total bandwidth capacity. If the right-most LED is amber, the switch is using less than 50 percent of its total bandwidth. If the LED to the left of the right-most LED is amber, the switch is using less than 25 percent of its total capacity, and so on. See Figure 1-7 for details. |
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Table 1-8 Meanings of Port Status LED Colors for Different Modes on Catalyst 2912 LRE XL and 2924 LRE XL Switches
Figure 1-7 shows bandwidth utilization percentages displayed by the right-most LEDs.
Expansion slot LEDs (shown in Figure 1-6) show the status of installed modules. The LEDs are numbered 1 (left slot) and 2 (right slot). Table 1-9 lists LED colors and their meanings.
| Color | Expansion Slot Status |
|---|---|
The switch rear panels have an AC power connector, an RPS connector, and an RJ-45 console port (see Figure 1-10, Figure 1-10, and Figure 1-11), which are described in this section.
You can provide power to the switch either through the internal power supply or through the Cisco RPS.
The internal power supply is an autoranging unit that supports input voltages between 100 and 240 VAC. If you plan to use the internal power supply, use the supplied AC power cord to connect the AC power connector to an AC power outlet.
Specific Cisco RPS models support specific Catalyst 2900 XL switches:
The Cisco RPS 600 (model PWR600-AC-RPS) provides a quasi-redundant power source for four external devices that use up to 150W DC each. Use a one-to-one cable (one connector at each cable end) to connect four external devices to the four DC output power modules. The power source is quasi-redundant because there are two AC input power modules for the Cisco RPS and one DC output power module for each external device. The AC input to the Cisco RPS is fully redundant, but the DC output to the external devices is not.
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Warning Attach only the Cisco RPS (model PWR600-AC-RPS) to the RPS 600 receptacle. |
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Note Do not connect the switch power cord to an AC outlet if the switch is also connected to a powered-on RPS. The switches do not support the fully-redundant configuration described in the RPS documentation. The redundant-with-reboot configuration is not recommended. |
For more information on the Cisco RPS 600, refer to the Cisco Redundant Power System Hardware Installation Guide.
The RPS is a 300W 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 power supply of a connected device fails and provides the necessary power to the failed device to prevent loss of network traffic. When the device internal power supply has been brought up or replaced, the RPS automatically stops powering the device.
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Warning Attach only the Cisco RPS (model PWR300-AC-RPS-N1) to the RPS 300 receptacle. |
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Note The RPS can only power one switch at a time. If more than one switch fails at the same time, any subsequent switch is not supported by the RPS until the first switch failure is resolved. |
For more information on the Cisco RPS 300, refer to the Cisco Redundant Power System 300 Hardware Installation Guide.
You can connect a switch to a PC through the switch console port and by using the supplied rollover cable and DB-9 adapter. You need to provide a RJ-45-to-DB-25 female DTE adapter to connect the switch console port to a terminal. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout information, see the "Connecting to the Console Port" section.
Posted: Tue May 27 20:42:41 PDT 2003
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