The Catalyst 3000 and the Catalyst Matrix mount in a standard 19-inch rack or cabinet. The installation area should be near a power source and should have enough room around the front and rear panels for cabling and access to controls. Use the following procedures for the installation of Catalyst Stack equipment.

Rack or Cabinet Mounting

If you install the Catalyst 3000 in a closed or multi-unit rack, observe the environmental guidelines from the last chapter, Chapter 4, "Preparing for Installation."

Caution The following rack mounting instructions need to be observed to ensure that the Catalyst Stack units and any other equipment are mechanically stable.

The following steps describe how to mount the Catalyst 3000 or Catalyst Matrix in a rack or cabinet:

Step 1 Using a Phillips, or cross-head, screwdriver, attach the two L-shaped mounting brackets to both sides of the Catalyst 3000 or the Catalyst Matrix with four 8-mm M4 screws for each side. The following illustration, Figure 5-3, shows mounting the brackets to a Catalyst 3000 unit. The position of the brackets are the same on the Catalyst Matrix.

Figure 5-3: Attaching the Mounting Brackets to a Catalyst 3000 or Catalyst Matrix

Before starting the next step, be sure you have the proper hardware for mounting the chassis with the attached brackets to you cabinet or rack.

Note (This note applies if the installation includes a Catalyst Matrix that will be cabled to several Catalyst 3000 units.) Due to cable length restrictions between the Catalyst Matrix and the Catalyst 3000 units, it is recommended to mount the Catalyst Matrix in the middle of the rack and mount the Catalyst 3000 units evenly above and below the Catalyst Matrix. See Figure 5-9, which shows an example of the Catalyst Matrix between five Catalyst 3000 units.

Step 2 Position the Catalyst 3000 or the Catalyst Matrix in the rack or cabinet and slide it up or down until the rack holes line up with the bracket holes. Attach the Catalyst 3000 to the rack with appropriate mounting screws. Make sure you have the proper screws that fit your cabinet or rack before attempting to mount the switch.

Figure 5-4: Mounting the Catalyst 3000 or Catalyst Matrix in a Rack or Cabinet

Note Only fixed brackets are supplied with these units. If you want to install a sliding pull-out mount, you will need to provide the extra mounting hardware.

Table-Mounting

Caution Due to weight constraints, place no more than one unit (or the equivalent weight of other equipment) directly on top of another chassis. More than one unit on top of another unit may cause damage to the lower unit.

The Catalyst 3000 should be mounted in an appropriate mounting rack, but if the situation warrants, such as a shortage of rack space or location constraints, the Catalyst 3000 can be surface mounted. The unit operates at a low noise level, which makes it suitable for a work area or almost anywhere with a large enough flat surface such as a table, desktop or similar area. Simply place the unit on a clear and level location. Leave enough room around the unit for ventilation and access to the controls and cable connectors.

Catalyst Stack Cable Connections

There are two Catalyst Stack configurations.

To cable two Catalyst 3000 units directly together to form a "back-to-back" stack.
To use an Catalyst Matrix which creates a stack of up to eight Catalyst 3000 units.

How to cable the Catalyst Stack equipment is described in the next two sections. The first section explains connecting two Catalyst 3000 units back-to-back. The next section describes how to connect Catalyst 3000 units to the Catalyst Matrix.

Note Downloading (such as updating firmware levels) to an individual Catalyst 3000 while it is part of a stack may cause conflicts within the stack. Except for very specific situations, downloading should be done to a Catalyst 3000 as a stand-alone unit. If the unit is part of a stack, disconnect the Stack Port cable before downloading.

Before you create a stack, or add to a stack, if any of the Catalyst 3000 units will need any downloading, perform the downloading before cabling the Catalyst 3000 units together.

Catalyst 3000 Back-to-Back Connection

To connect two Catalyst 3000 units together, an installed Catalyst Stack Port module must be in the expansion slot in the back of each Catalyst 3000. (See Figure 5-5.) One stack port cable is used to connect to the I/O stack port on each of the Catalyst Stack Port modules. The stack ports and the stack port cable ends are SCSI-2 type connectors.

Note The stack port cable connection is "hot-swappable." The cable can be connected or disconnected, when power to either Catalyst 3000 is on or off.

Use the following steps to install two Catalyst 3000 units in a back-to-back configuration.

Note To prevent bent pins, do not install the stack port cable connector at an angle. Use extra care to insert the cable connector straight into the Catalyst Stack Port connector.

Step 1 Connect one end of the stack port cable to the stack port of the Catalyst Stack Port module on one Catalyst 3000 units.

It does not matter which end of the cable to use. Either end of the stack port cable can be connected to either one of the Catalyst 3000 units.

Step 2 Connect the other end of the cable to the stack port on the other Catalyst 3000.

The following illustrations, Figure 5-5 and Figure 5-6, show how two Catalyst 3000 units are cabled together. (The cable connector is shown at an angle for illustration purposes.)

Figure 5-5: Connecting the Stack Port Cable to the Catalyst Stack Port Module on the Catalyst 3000.

Figure 5-6: Connect the Other End of the Cable to the Stack Port on the Other Catalyst 3000.

Connecting Catalyst 3000 Units to the Catalyst Matrix

Up to eight Catalyst 3000 units can be connected to a Catalyst Matrix. This configuration requires a stack port cable and a Catalyst Stack Port Module for each Catalyst 3000. The connection is made through one of the eight I/O stack ports on the back panel of the Catalyst Matrix to the single I/O stack port on the Catalyst Stack Port installed in the back of each Catalyst 3000. All of the I/O ports are SCSI-2 type connectors. Use the following instructions (after mounting the Catalyst 3000 units and Catalyst Matrix in a rack or cabinet) to cable the units together.

Step 1 Attach one end of the stack port cable to Port 1 (recommended port to use first) on the Catalyst Matrix. (See Figure 5-7.) It does not matter which end of the cable is used and it does not matter if the Catalyst 3000 or Catalyst Matrix is powered on or off.

Note When installing the stack port cable connector, keep the connector straight as you insert it into the stack port connector. Inserting the connector at an angle may cause bent pins (cable connector shown at an angle for illustration purposes only).

Figure 5-7: Connecting the Stack Port Cable to Port 1 of the Catalyst Matrix

Step 2 Attach the other end of the cable to the Catalyst Stack Port connector on the back of a Catalyst 3000 (See Figure 5-8.) Repeat these steps for each Catalyst 3000 using the next highest numbered Catalyst Matrix port (See Figure 5-9.) In Figure 5-8 the Catalyst Matrix port is shown as the fourth unit from the top.

Figure 5-8: Connecting the Stack Port Cable to the Stack Port on the Catalyst 3000

Figure 5-9: Rear Panel View of a Catalyst Matrix Cabled to Several Catalyst 3000 Units

Connecting the Catalyst 3000 to the Network

10Base-T

There is one AUI/UTP port, 15 UTP (Unshielded Twisted Pair) ports and two expansion module ports on the front panel of each Catalyst 3000. The UTP ports are 10Base-T using RJ-45 connectors. Use these ports to connect to computers, hubs, servers, and other network devices, or to a network backbone. Figure 5-9 shows examples of Ethernet switches, devices, and networks connected to the Catalyst 3000 ports.

Figure 5-10: Examples Of Different Network Connections

Setting the MDI or MDI-X Device

MDI (Media Dependent Interface, or "straight cable") is the IEEE 10Base-T standard for the UTP cable interface. For two 10Base-T devices to communicate with each other, the transmitter of each device must be connected to the receiver of the other device. You can achieve this connection by using a crossover cable, or by using a port that implements the crossover internally. Ports that implement the crossover internally are called MDI-X; "X" stands for crossover.

UTP ports 1 through 15 on the Catalyst 3000 are always MDI-X mode.

When connecting devices that have the same port type, that is, both are MDI or both are MDI-X, use a cross-over cable. For example, when connecting hubs and concentrators that have MDI-X ports to the MDI-X ports on the Catalyst 3000, use a cross-over cable.

When connecting devices that have different port types, that is, one is MDI and one is MDI-X, use a straight cable. For example, servers, PCs, routers, bridges or similar equipment use MDI type ports, therefore use a straight cable to connect these MDI ports to the MDI-X ports on the Catalyst 3000.

See the pinouts in "Appendix A" if a crossover cable needs to be made.

Port 16 MDI or MDI-X Switch

Port 16 can be set on the Catalyst 3000 to either MDI or MDI-X by using the push-button to the right of that port. Refer to the following table (Table 5-1) and illustration (Figure 5-11) to make sure the button is set correctly.

Table 5-1: Port 16 Switch Setting

Push-button	Mode
In (below level of front panel)	MDI
Out (flush with front panel)	MDI-X

In Figure 5-11, in the top example, the button is shown in the depressed position.

Figure 5-11: Front Panel Push-Button

Note When the button is pushed in, you should feel a "click" and the button should stay in. When you push the button in again, it should release and come out and stop when it is level with the front panel.

Because of different combinations of equipment and cables, you should refer to the table below to determine whether you should use the MDI or MDI-X setting:

Table 5-2: MDI/MDI-X Selection

Device	Crossover Cable	Straight Cable
Hub (MDI-X)	MDI-X	MDI
Router	MDI	MDI-X
Server	MDI	MDI-X

If you do need to order, or make a crossover cable, see the pin-outs in Appendix A.

Connecting 10Base-T Port

This section explains how to connect a 10Base-T cable to a 10Base-T port on a Catalyst 3000.

Caution Do not touch the connector pins of connectors or cables. Static discharge may damage equipment.

The Catalyst 3000 has 16 10Base-T ports. Connect them as follows:

Using the previous table, determine whether you should use a straight or crossover cable, and for port 16, whether to select MDI or MDI-X mode.

To create a crossover cable, see Appendix A.

Connect a 10Base-T cable from a hub or end-node device to one of the UTP connectors on the front of the Catalyst 3000.
Insert the cable's 8-pin (RJ45) plug into the 10 Base-T jack until it clicks into place (see Figure 5-12).

Figure 5-12: 10Base-T Cable Insertion

Connecting the AUI Port

This section explains how to connect to the AUI port on the Catalyst 3000.

Caution Do not touch the hub connector pins or the cable connector pins. Static discharge may damage the equipment.

To connect the AUI port to different media types, use an external transceiver. The Catalyst 3000 supports full-duplex Ethernet when connected to a transceiver supporting full-duplex.

Connecting to an External Transceiver

The following section describes how to connect the AUI port on the Catalyst 3000 to an external transceiver.

Note You may use either the AUI port, or the UTP port 1, but not both. If both cables are connected, the Catalyst 3000 uses the UTP port only.

Disable SQE (Signal Quality Error) on the IEEE 802.3 transceiver connected to the Co-ax Backbone.
Connect the AUI cable to the transceiver.
Connect the other end of the AUI cable to the AUI port on the front panel of the Catalyst 3000 (see Figure 5-13). To expose the port connectors, slide the latch to the left. After inserting the cable, lock it in place by sliding the latch to the right.

Figure 5-13: Connecting the AUI Port to an External Transceiver

Configuring Full-Duplex Communications

On Enhanced models, 10BaseT ports on the Catalyst 3000 can be set to either Half-Duplex or Full-Duplex communication mode by the use of DIP switches on the back panel (see Figure 5-14) If the enhanced feature is not configured, then only half-duplex can be used. The enhanced feature must be set and verified through the console. See Chapter 7, "Console Configuration."

Contact your Cisco sales representative for information on how to obtain the enhanced software version.

Note The device that the Catalyst 3000 is communicating with must be set to the same communication mode--that is, a full-duplex port can communicate only with another full-duplex device. If a switch is set to full-duplex incorrectly, the Catalyst 3000 may run slow or "hang" and a console error will be generated. The switch will need to be changed to half-duplex for the system to resume operation.

The AUI port can be used for full-duplex communications only with an external transceiver that supports full-duplex Ethernet.

Use the following four steps to set full-duplex or half-duplex communication modes for 10Base-T ports (1 through 16) on the Catalyst 3000:

Step 1 Locate the DIP switches on the rear panel as illustrated in the following figure:

Figure 5-14: Selecting UTP Ports for Half-Duplex or Full-Duplex Communication

Step 2 Set the DIP switch for each port as follows:

Half Duplex	Down
Full Duplex	Up

Step 3 When power is applied to the Catalyst 3000, the switch settings will automatically take effect.

Step 4 The settings can be changed while the Catalyst 3000 is running. The new settings take effect right after you change the switch.

The LNK/FDX LED on the front panel is on when a half or full-duplex communications link has been established. The color of the LED responds to whether half or full-duplex:

Green	Half-Duplex
Yellow	Full-Duplex

Note If the LNK/FDX LED is not on, you may be using the wrong type of cable or--if the cable is connected to port 16--the MDI-X button may be in the incorrect position.

Checking the Installation

Before you apply power, inspect the equipment thoroughly. Verify that all cables are installed correctly. Check their routing, so they are not damaged or create a safety hazard. Be sure all equipment is mounted properly and securely.

Applying Power

Warning The chassis does not have an on/off switch. Power is on when the Catalyst 3000 or the Catalyst Matrix is plugged into the power source. There are no user serviceable parts inside the Catalyst 3000. Any internal upgrades or service should be performed by Qualified Personnel ONLY.

Use the following steps to power on your Catalyst 3000.

Step 1 Ensure that you are using the correct power source.

Step 2 Using the supplied power cable, plug the female end of the cable into the AC receptacle on the Catalyst 3000 or Catalyst Matrix module.

For the Catalyst 3000 the receptacle is at the lower right hand corner on the back panel. (See Figure 5-15.)
For the Catalyst Matrix it is at the lower right hand corner on the front panel of each module. (See Figure 5-15.)

Step 3 Plug the male end of the power cord(s) into a properly grounded electrical outlet.

Figure 5-15: AC Connector - to the Far Right on the Rear Panel

Figure 5-16: AC Connector - On the Lower Right Corner of the Front Panel of Each Catalyst Matrix

Step 4 Verify that the power (PWR) LED is on. If not, make sure the outlet is working properly. If the outlet is working, but the PWR LED and the fans are not on, see Chapter 11, "Troubleshooting."

Step 5 When the Catalyst 3000 powers on, observe the self-test diagnostic that the unit runs for approximately 6-8 minutes. The DIAG LED is on for the duration of the test, turning off when the self-test is complete.

Step 6 At the completion of the diagnostics, the front panel LEDs should be illuminated according to the status of the unit's configuration.

Note If the Catalyst 3000 fails to power up correctly or if it encounters any unrecoverable error, the FAULT LED will be on or flashing on. If the FAULT LED is on or flashes, see Chapter 11, "Troubleshooting."

The Catalyst Matrix chassis or modules do not run power-on diagnostics, so neither have a DIAG or FAULT LED. When power is applied to the Catalyst Matrix module, the PWR LED and the fan should turn on. If either the PWR LED or the fan does not turn on, Chapter 11, "Troubleshooting."

Catalyst 3000 Control Panels

The following tables list and describe the connectors, switches and status LEDs on the Catalyst 3000.

Front Panel

The following tables list a description of connectors, switches, and status LEDs on the front panel of the Catalyst 3000.

Connectors

Table 5-3: Front Panel Connectors

Name	Description
MDI-X	UTP 10Base-T ports with RJ45 jacks. Ports 1-15 are always MDI-X.
MDI	UTP 10Base-T port with RJ45 jack. Port 16 can be set to MDI (button in) or MDI-X (button out).
AUI	Standard IEEE 802.3 Attachment Unit Interface (AUI). Note: NOT active if UTP port 1 is being used.

Switches

Table 5-4: Front Panel Switches

Name	Description
MDI	Sets port 16 to MDI (button in) or MDI-X (button out). Ports 1-15 are always MDI-X.

Status LEDs

Table 5-5: Front Panel LEDs

Name	Color	Description
PWR	Green	The Catalyst 3000 is receiving power.
DIAG	Green	The Catalyst 3000 is performing its self-test after power on or reset. The self-test takes approximately 4-5 minutes for power cycle and 40 seconds for reset.
FAULT	yellow	When on, an unrecoverable error has occurred.
XMIT	Green	A packet has been transmitted to the attached segment from another port.
RCV	Green	A packet has been received from a different segment.
LNK/FDX	Green or yellow	LED off = no link detected Green = half-duplex connection Yellow = full-duplex connection

Rear Panel

The following table lists the rear panel controls on the Catalyst 3000.

Table 5-6: Rear Panel Switches and Connectors

Name	Description
RST	Reset - full system reset of software and hardware.
SYS REQ	System Request - initiates a set of system request menus on the attached console.
DUPLEX	Establishes the communication setting for ports 1-16: Half-Duplex (down) or Full-Duplex (up). The connected device must use the same communications setting.
RS-232 (DB-9 conn.)	Console connection.
SwitchProbe (Switch Port Analyzer) port (AUI - DB15 connector)	For monitoring ports 1 to 16. This port is for monitoring only, one port at a time. The monitoring is set through the console or SNMP.
AC connection	Standard AC connection.

Catalyst Matrix Control Panels

The following tables list and provide a description of the connectors, switches, and status LEDs on the Catalyst Matrix.

Front Panel

Table 5-7, Table 5-8, and Table 5-9 list the front panel controls on the Catalyst Matrix.

Connectors

Table 5-7: Front Panel Connectors

Name	Description
AC connection	Standard AC power connection.

Switches

Table 5-8: Front Panel Switches (Push-buttons)

Name	Description
SWITCH ID	When pressed, each Catalyst 3000 attached to the Catalyst Matrix will display its box number.
ACTIVATE	When the ACTIVATE pushbutton is pressed on an off-line module, it will go on-line and the previous on-line module will go off-line. There is no effect if it is pressed on an on-line module.

Status LEDs

Table 5-9: Front Panel LEDs

Name	Color	Description
READY	Green	Indicates module is fully inserted and powered up.
POWER	Green	Indicates module is receiving power.
ACTV	Green	ACTIVE LED: On when module is on-line. Off when off-line.

Rear Panel

Table 5-10 and Table 5-11 list the rear panel controls on the Catalyst Matrix.

Connectors

Table 5-10: Rear Panel Connectors

Name	Description
PORT1 to PORT8	SCSI 2 type connectors. For connecting the Catalyst Matrix to Catalyst 3000s to form a stack.

Status LEDs

Table 5-11: Rear Panel LEDs

Name	Color	Description
LINK; P1 to P8	Green	LED off = no link detected. Green = Shows connection to Catalyst 3000.

Catalyst Matrix Chassis Description

The chassis design allows two Catalyst Matrix modules to be installed; a primary module, and a secondary module for redundancy. Each module contains complete packet switch circuitry, power supply, fan, and AC input power connector. The modules are front accessible and field replaceable.

Internally the chassis contains the I/O backplane and connectors for two modules. Externally, the chassis has I/O connectors and indicators (one per port) for connecting Catalyst 3000 units.

The chassis is 2 RU (Rack Units) in height. The width is 19 inches for rack mounting. The chassis depth is approximately 14 inches.

Catalyst Matrix IO, Indicators, and Controls

Module

The following LEDs are on the front panel of the module:

READY (green)

On indicates that the module is fully inserted and powered.

POWER (green)

On indicates that the module is powered-on.

ACTIVE (green)

On indicates whether it is functioning as the on-line module.

The following push-buttons are on the front panel of the switch module:

ACTIVATE.

This push-button controls the on-line/off-line function of the modules.

SWITCH ID.

When this push-button is pressed, the attached Catalyst 3000 units display their box number on their front panel LEDs for several seconds.

The AC input power connector is on the front of each module.

Chassis

The following LED is on the back panel and is associated with the I/O connectors:

LINK (green) There are eight green LINK LEDs, one per port; P(ort)1 to P8. These LEDs are on only when the port is connected to a powered-on Catalyst 3000.

Catalyst Matrix

The standard configuration for the Catalyst Matrix includes a chassis and one Catalyst Matrix module (see Figure 5-17). A Catalyst Matrix module includes a fan, power supply, front AC power receptacle, and complete logic circuitry. The Catalyst Matrix chassis needs only one module to operate, but has another slot available for a second, redundant module. If two modules are used, the unit runs with the one on-line (primary) module installed in the left hand side and an off-line (secondary) module installed in the right hand side. If the primary module should fail, Catalyst Matrix operation is switched to the secondary module through automatic logic control. The modules can be also be switched manually using the ACTIVATE push-button on the front panel. For a detailed explanation of the Catalyst Matrix modules, see the section, Catalyst Matrix Module Description, later in this chapter.

The following figure shows the Catalyst 3000 with a Catalyst Matrix module in the left (primary) position and a blank cover plate over the right (secondary) position.

Figure 5-17: View of a Catalyst Matrix Chassis with a Catalyst Matrix Module

Catalyst Matrix Module Installation

A Catalyst Matrix module can be installed in either the left hand, right hand or both positions of the Catalyst Matrix chassis. If a module fails, it can be easily replaced by the user. The only tool needed is a Phillips or cross-headed screwdriver. The following describes the procedure for adding or replacing a Catalyst Matrix module.

Note The Catalyst Matrix modules are "hot-swappable." A module can be swapped with power applied and when it is on-line to the system. However, if possible, try to avoid swapping an on-line module during very heavy traffic. The switching time from an on-line module to an off-line module is very short, but during extremely heavy traffic it could cause an interruption of data. When it is necessary to remove an on-line module, if possible, switch it off-line when there is little or no traffic. Disconnect power from the module before removing it from the chassis.

The following steps describe how to install or replace a Catalyst Matrix module.

Use the following steps for installing or replacing a Catalyst Matrix module. If you are installing a module into an open slot proceed to Step 5.

Step 1 If there is a blank cover plate, remove the screw located at the top center and then remove the plate. (Reverse the procedure to install a cover plate.)

Step 2 If removing a module, switch it off-line and disconnect power from the module. (See previous note pertaining to power to the module.)

Step 3 Remove the screw located at the top center of the front of the module.

Step 4 Using the handle on the front of the module, pull the module straight out from the chassis.

Note The module may be firmly seated in the chassis; if so, you may need to exert some reasonable force to disengage the module.

Step 5 Insert the module into the open slot. In Figure 5-18 the secondary module is being inserted into the unit. Place the bottom of the module against the bottom of the slot and slide the module into the slot. You should feel some resistance as the module connector mates with the Matrix connector. If you feel solid resistance, pull the module back a little and try again while moving the module slightly to the left or right until you feel the two connectors engage. After the connectors start to engage you should be able to insert the module approximately one-half inch further and then you should feel hard resistance. The connectors should be seated at that point.

Step 6 Install the screw at the top center of the module's front plate.

Step 7 Connect the power cord to the module.

Step 8 To bring this module on-line, press the ACTIVATE push-button.

Figure 5-18: Inserting a Secondary Module into a Catalyst Matrix

Catalyst Matrix Module Description

There are two slots in the Catalyst Matrix for modules; a primary slot (normally on-line), and a secondary slot (normally off-line). The modules are hot- swappable. When a secondary module is installed, it provides a redundant module that can be switched on-line if the primary module fails. The primary slot is the one on the left, as viewed from the front of the unit.

Modules switch-over automatically or manually. Automatic switch-over occurs if power fails on the active module or if a primary to secondary switch-over is initiated through any attached Catalyst 3000. Switch-overs can also be initiated manually using the ACTIVATE front panel push-button on the Catalyst Matrix module. Pressing the push-button on the off-line module forces it on-line and the other module to go off-line. The newly activated module assumes the switching functions. The following sections are detailed descriptions of module switch-overs.

Automatic Switch-over From the Catalyst 3000

Automatic switch-over is initiated when a Catalyst 3000 senses that the primary module has failed. When a failure is detected, any Catalyst 3000 can request the Catalyst Matrix to switch from the primary module to the secondary module. Once the secondary module is on-line, no further switch-over requests are generated by the Catalyst 3000. This one-time switch-over prevents module swap oscillations. The Catalyst 3000 cannot initiate a switch-over from the secondary module to the primary module.

Each Catalyst 3000 periodically sends a packet to itself (self-ping). As long as the packet returns, the on-line Catalyst Matrix module is considered OK. If the self-ping packets do not arrive after a time-out, the on-line module is considered faulty and the Catalyst 3000 requests a module switch-over. The request is via a software controlled request line in the Stack Port link. If a switch-over is requested and the primary module is on-line, the Catalyst Matrix will switch to the secondary module (if present).

Manual Switch-overs

A manual switch-over is one that is initiated by the operator. Each module has an ACTIVATE push-button on the front panel. Pressing this push-button on the off-line module turns it on-line (active) and the module that was on-line is forced off-line. Pressing the push-button on the on-line module has no effect.

Switch-over Impact on Traffic

During a controlled switch-over, data transfer management helps prevent errors. A controlled switch-over is one activated by an Catalyst 3000 (automatic) or by the user push-button (manual).

An uncontrolled switch-over occurs when the on-line module is removed or powered off. Several packets could get corrupted during this time.

If the Catalyst Matrix ports are idle during module switch-over, no packets will be corrupted.

Powering a module on or off, or moving a module has the following effects:

Simultaneous power up - When both modules are installed and powered up at the same time, the primary module will go on-line. The secondary module has a power-up delay that allows the primary module to go on-line first.

Hot insertion - If a second module (primary or secondary) is inserted and powered up after the other module has gone on-line, nothing will happen; the new module will stay off-line and the other will stay on-line.

On-line module powered off or removed - Whether primary or secondary, the remaining module will detect the other's absence and go on-line. (Packet errors may occur with this type of switch-over.)

Both ACTIVATE push-buttons pressed simultaneously - Whichever push-button is pressed first causes its module to go on-line and force the other off-line. In the unlikely case of a tie, the primary module will go on-line.

Installing Rear Expansion Modules on the Catalyst 3000

The following section explains the installation and use of the Catalyst Stack Port connection module, which enables two or more Catalyst 3000 units to work together as a stack.

Catalyst Stack Port

The Catalyst Stack Port is a single-port expansion module with a special 50-pin connector. If you have two Catalyst 3000 units each equipped with a Catalyst Stack Port module, then when you connect the modules the two Catalyst 3000 units can function as a stack. If you have more than two Catalyst 3000 units each equipped with a Catalyst Stack Port module, you can combine them into a unified Catalyst Stack by connecting each module to a Catalyst Matrix unit. See the section "Connecting Catalyst 3000 Units to the Catalyst Matrix." The Catalyst Matrix supports a stack of up to eight Catalyst 3000 units.

Inserting the Catalyst Stack Port

The module can be inserted in its expansion slot as shown in Figure 5-19.

Figure 5-19: Inserting a Catalyst Stack Port Expansion Module

Caution Catalyst Stack Port modules are not "hot-swappable." Always be sure that the power is off before installing or removing a Catalyst Stack Port module. If the power is on, damage to the equipment may result.

**before**Do not touch the components or connectors on the Catalyst Stack Port module. Do not touch cable connector pins when the other end is plugged in. Damage may result from static discharge.@@before@@

Caution **after**Do not touch the components or connectors on the Catalyst Stack Port module. Do not touch cable connector pins when the other end is plugged in. Damage may result from static discharge.@@after@@

**before**During installation, the connector on the Catalyst Stack Port module must line up evenly with the connector inside the expansion slot. Mis-alignment may cause the connector pins to bend. When inserting the Catalyst Stack Port module into the expansion slot, be sure that the board is level and that the left and right sides slide evenly into the slot@@before@@

Caution **after**During installation, the connector on the Catalyst Stack Port module must line up evenly with the connector inside the expansion slot. Mis-alignment may cause the connector pins to bend. When inserting the Catalyst Stack Port module into the expansion slot, be sure that the board is level and that the left and right sides slide evenly into the slot@@after@@

Use the following steps when installing a Catalyst Stack Port module into a the rear expansion slot of the Catalyst 3000 chassis.

Step 1 Disconnect the power to the Catalyst 3000.

Step 2 If a blank cover is over the Catalyst Stack Port module slot, remove it by unscrewing its two attachment screws.

Step 3 To prevent possible static damage to the module, hold it by its edges only. Be careful not to touch the top or bottom.

Step 4 Slide the module into the slot evenly, taking care to line up the edges with the guides.

Step 5 Seat the module by pressing the front of the module with your thumbs.

Step 6 Secure the module to the chassis by tightening the thumb (panel) screws at the left and right edges of the expansion modules front panel. Do not overtighten the screws.

Step 7 Return power to the switch.

Catalyst Stack Port Expansion Module Cables

The Catalyst Stack Port module has a 50-pin SCSI-2 connector designed to accept stack-port cables. These cables are available from your local reseller

Note When installing the stack port cable connector, keep the connector straight as you insert it into the stack port connector. Inserting the connector at an angle may cause bent pins.

Installing Front Expansion Modules on the Catalyst 3000

The 100Base-TX expansion module is explained in the following sections.

The 100Base-TX

The WS-X3001 is a single-port 100Base-TX expansion module. Use the 100Base-TX to connect to computers, hubs, servers, and other high-speed network devices. The following sections explain the installation, cable connection, and network connection for the 100Base-TX expansion module. For a functional description of the 100Base-TX and the Catalyst 3000, see Chapter 2, "Catalyst 3000 Theory of Operation" in this manual.

The 100Base-TX expansion module is shown in Figure 5-20.

Figure 5-20: 100Base-TX Module

Figure 5-21 is an example of a network connection showing a Catalyst 3000 with two 100Base-TX modules. Each module is linked to an independent high-speed file server.

Figure 5-21: 100Base-TX Modules Connected to High-Speed Network Servers

Network Interface Cards

A Network Interface Card (NIC) is required in some network devices in order to connect them to the 100Base-TX. Several NICs, produced by different manufacturers, have been tested to ensure compatibility and optimum performance between the 100Base-TX and these network devices. For a list of approved NICs, contact your Cisco sales representative.

Inserting the 100Base-TX

The modules can be inserted in either of the two expansion slots, as shown in Figure 5-22.

Use the following steps when installing a 100Base-TX module into an expansion slot of the Catalyst 3000 chassis.

Caution Expansion modules are not "hot-swappable." Always be sure that the power is off before installing or removing an expansion module. If the power is on, damage to the equipment may result.

**before**Do not touch the components or connectors on the expansion module. Do not touch cable connector pins when the other end is plugged in. Damage may result from static discharge.@@before@@

Caution **after**Do not touch the components or connectors on the expansion module. Do not touch cable connector pins when the other end is plugged in. Damage may result from static discharge.@@after@@

**before**During installation, the connector on the expansion module must line up evenly with the connector inside the expansion slot. Misalignment may cause the connector pins to bend. When inserting the module into the expansion slot, be sure that the board is level and that the left and right sides slide evenly into the slot.@@before@@

Caution **after**During installation, the connector on the expansion module must line up evenly with the connector inside the expansion slot. Misalignment may cause the connector pins to bend. When inserting the module into the expansion slot, be sure that the board is level and that the left and right sides slide evenly into the slot.@@after@@

Step 1 Disconnect the power to the Catalyst 3000.

Step 2 If a blank cover is over the expansion module slot, remove it by unscrewing its two attachment screws.

Step 3 To prevent possible static damage to the module, hold it by its edges only. Be careful not to touch the top or bottom.

Step 4 Slide the module into the slot evenly, taking care to line up the edges with the guides.

Figure 5-22: Inserting a 100Base-TX Expansion Model

Step 5 Seat the module by pressing the front of the module with your thumbs.

Step 6 Secure the module to the chassis by tightening the thumb (panel) screws at the left and right edges of the expansion modules front panel. Do not overtighten the screws.

Step 7 Return power to the switch.

100Base-TX Expansion Module Cables

The 100Base-TX module's network port is an RJ-45 connector that uses 100Base-TX cable.

Note 100Base-TX and 10Base-T cable have the same connectors and cable pinouts, but using one in place of the other may cause system performance problems. 10Base-T is a Category 3 cable, and 100Base-TX is a Category 5 cable (physically, category 5 cable is usually a little heavier or stiffer than category 3 cable). Check to see if the cable type is printed on the cable jacket.

The 100Base-TX module's network port is an RJ-45, 100Base-TX type that is always in MDI-X mode. Cabling the 100Base-TX to different types of equipment that have MDI or MDI-X ports will require different types of 100Base-TX cable. The cable types are described below.

Straight-through cable: If the 100Base-TX is cabled to a port that is MDI, such as a server, use a straight-through connecting cable.
Crossover cable: If the 100Base-TX is cabled to a port that is also MDI-X, such as a high-speed hub, use a crossover cable.

Use the 10Base-T cable information in Appendix A as a reference for 100Base-TX cable.

Connecting Cables to 100 Base-TX Expansion Module Ports

Connect cables to the RJ-45 port on the front of the 100Base-TX module as follows:

Step 1 Half/full-duplex mode. If the Catalyst 3000 is an enhanced version, see the section "Configuring Full-Duplex Communications" (earlier in this chapter) for a detailed explanation on how to determine whether the communication mode will be half- or full-duplex. The Catalyst 3000 and the 100Base-TX will operate in half-duplex mode only for non-enhanced Catalyst 3000 units. Set the DUPLEX switch on the front of the module to the appropriate position: down for half-duplex, or up for full-duplex. Set to half-duplex only for non-enhanced Catalyst 3000 units.

Step 2 Determine that you have the correct cable. See "Appendix A" for a description of 100Base-TX cables.

Step 3 Connect a 100Base-TX cable from a hub or end-node device to the RJ-45 jack on the front of the expansion module.

Step 4 Insert the cable's 8-pin (RJ-45) plug into the jack until it clicks into place.

Figure 5-23: RJ-45 Connector Insertion

Checking the Installation

When the connection is established, the LNK/FDX LED is on: green in Half-Duplex mode, or yellow in Full-Duplex mode. If the LED is not on, there may be a cable problem. Verify that you are using the correct type of cable, then check if the cable is bad by trying a different one.

If, after installation, there is poor system performance or the 100Base-TX module does not work at all, remove the module and check for any damage or bent connector pins. You may need a bright light to see inside the expansion module slot to check for bent pins. If you cannot find an immediate cause for the problem, refer to Chapter 11, "Troubleshooting."

100Base-TX Control Panel

The following tables describe the connectors, LEDs, and switches on the 100Base-TX module.

Table 5-12: 100Base-TX Expansion Module Connector

Name	Description
Network Port	8-pin, RJ-45, 100Base-TX

Table 5-13: 100Base-TX Expansion Module LEDs

Name	Description
XMIT	A packet has been transmitted to the attached segment.
RCV	A packet has been received from the attached segment.
LNK/FDX	Off = link not detected Green = half-duplex Yellow = full-duplex (Enhanced version only)
DIAG	Running diagnostic.

Table 5-14: 100Base-TX expansion Module Switch

Name	Description
Duplex	Establishes the communication mode of the network port if the Catalyst 3000 is an enhanced version. Only set to half-duplex for non-enhanced versions. Full-Duplex (up) or Half-Duplex (down).

Table of Contents

Installation

Rack or Cabinet Mounting

Table-Mounting

Setting the MDI or MDI-X Device

Port 16 MDI or MDI-X Switch

Connecting 10Base-T Port

Connecting the AUI Port

Connecting to an External Transceiver

Catalyst 3000 Control Panels

Status LEDs

Catalyst Matrix Control Panels

Status LEDs

Status LEDs

Catalyst Stack Port

Catalyst Stack Port Expansion Module Cables

100Base-TX Expansion Module Cables

100Base-TX Control Panel