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Warning Before you install, operate, or service the system, read the Site Preparation and Safety Guide. This guide contains important safety information you should know before working with the system. |
This chapter describes how to install the supervisor engines and switching modules, and contains the following sections:
The Catalyst 4003 switch can contain one supervisor engine (in slot 1) and any combination of supported switching modules in slots 2 and 3. The Catalyst 4006 switch can contain one supervisor engine (in slot 1) and any combination of supported switching modules in slots 2 through 6.
The following sections describe the Catalyst 4003 and 4006 supervisor engine and switching modules.
The Catalyst 4003 supervisor engine (WS-X4012) (Figure 5-1) and Catalyst 4006 supervisor engine (WS-X4013) (Figure 5-2) have the following features:
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Note Packets are not forwarded while the module is removed, and a system reboot occurs when a supervisor engine is reinserted. |
To install the supervisor engine, follow the procedure in the "Installing the Modules" section.
The following connectors, LEDs, and a switch are located on the front panel of the supervisor engine:
Table 5-1 describes the supervisor engine LEDs.
| LED | Color | Description |
|---|---|---|
STATUS |
| Indicates the results of a series of self-tests. |
| Green | All diagnostic tests pass. |
| Red | A test other than an individual port test fails. |
| Orange | System boot or diagnostic tests in progress. |
| Off | Module is disabled. |
Link Status |
| Indicates the status of the 10BaseT or the 10/100BaseT Ethernet management port. |
| Green | Link is operational. |
| Orange | Link is disabled by user. |
| Flashing orange | Power-on self-test indicates a faulty port. |
| Off | No signal detected, or link configuration failure. |
The WS-X4012 supervisor engine has a 10BaseT Ethernet management port. The WS-X4013 supervisor engine module has a 10/100BaseT Ethernet management port. Both supervisor engines use an RJ-45 connector on the front panel with a link status LED. See Figure 5-1 (WS-X4012) or Figure 5-2 (WS-X4013) for the location of the port.
TCP/IP-based management services available through inband access also are provided through this port (Telnet and SNMP). This management port also supports image download.
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Note The 10BaseT and 10/100BaseT Ethernet management ports are for network management only. These ports do not support network switching. |
The console port allows you to perform the following functions:
The Catalyst 4003 console port is a DCE DB-25 receptacle, which supports a DCE EIA/TIA-232 interface. The Catalyst 4006 console port is a RJ-45 receptacle.
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Note EIA/TIA-232 was known as recommended standard RS-232 before its acceptance as a standard by the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA). |
The following sections describe switching module features. For instructions on how to install the modules, see the "Installing the Modules" section. The switching modules for the Catalyst 4003 and 4006 switches are described in the following sections:
The 24-Port 100BaseFX Fast Ethernet switching module, shown in Figure 5-3, provides 24 switched, 100BaseFX (multimode fiber-optic cable), full- or half-duplex Fast Ethernet ports using MT-RJ connectors.
The 48-Port 10/100-Mbps Fast Ethernet switching module, shown in Figure 5-4, provides 48 switched, 10/100-Mbps (10/100BaseTX Category 5 UTP), full- or half-duplex Fast Ethernet ports using RJ-45 connectors.
The 48-Port 10/100-Mbps Fast Ethernet switching module, shown in Figure 5-5, provides 48 switched, 10/100-Mbps (10/100BaseTX Category 5 UTP), full- or half-duplex Fast Ethernet ports using four RJ-21 connectors.
The 32-Port 10/100-Mbps Fast Ethernet plus 2-port Gigabit Ethernet switching module, shown in Figure 5-6, provides two Gigabit Ethernet ports and 32 switched, 10/100-Mbps (10/100BaseTX Category 5 UTP), full- or half-duplex Fast Ethernet ports using RJ-45 connectors.
The Gigabit Ethernet ports can be configured with any combination of shortwave (SX), longwave/long-haul (LX/LH), and extended range (ZX) Gigabit Interface Converters (GBICs). For a description of GBICs, see the "Installing, Removing, and Maintaining GBICs" section.
10/100-Mbps Ethernet ports provide direct connections to switches, hubs, servers, workstations, computers, or similar devices.
The 32-Port 10/100-Mbps BaseX Ethernet routing module, shown in Figure 5-7, provides 32 switched, 10/100-Mbps ports using RJ-45 connectors. This module also provides Layer 3 route switching through two Gigabit Ethernet ports on the module front panel.
The Gigabit Ethernet ports can be configured with any combination of shortwave (SX), longwave/long-haul (LX/LH), and extended range (ZX) GBICs. For a description of GBICs, see the "Installing, Removing, and Maintaining GBICs" section.
The 10/100-Mbps Ethernet ports provide direct connections to switches, hubs, servers, workstations, computers, or similar devices.
The 32-port 10/100-Mbps Fast Ethernet switching module, shown in Figure 5-8, provides 32 switched, 10/100-Mbps ports, and passes two full-duplex Gigabit Ethernet links to a daughtercard, which can implement various types of uplinks.
The 10/100-Mbps Ethernet ports provide direct connections to switches, hubs, servers, workstations, computers, or similar devices.
The 32-port 10/100-Mbps Fast Ethernet switching module has an optional 4-port MT-RJ uplink module (WS-U4504-FX-MT).
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Note The 32-Port 10/100-Mbps Fast Ethernet switching module operates with or without the 4-port MT-RJ uplink module (WS-U4504-FX-MT) installed. |
The 4-Port MT-RJ uplink module, shown in Figure 5-9, can be installed onto a WS-X4232-RJ-XX 10/100-Mbps Fast Ethernet switching module to provide additional port configurations.
Each port has a port link status LED below it. The LEDs are labeled N+x. The N indicates the last number of the port that is used on the 32-port 10/100-Mbps BaseT Ethernet switching module. For the first port on the 4-port MT-RJ uplink module, add 1 to that number; for the second port, add 2; for the third port, add 3; for the last port, add 4.
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Note The 32-Port 10/100-Mbps Fast Ethernet switching module operates with or without the 4-port MT-RJ uplink module (WS-U4504-FX-MT) installed. |
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Note The WS-X4232-RJ-XX must be removed from the chassis to remove or install the uplink module. |
The 6-port 1000BaseX Gigabit Ethernet switching module, shown in Figure 5-10, provides six switched, 1000-Mbps, full-duplex ports.
The Gigabit Ethernet ports can be configured with any combination of shortwave (SX), longwave/long-haul (LX/LH), and long range (ZX) GBICs. For a description of GBICs, see the "Installing, Removing, and Maintaining GBICs" section.
The Gigabit Ethernet ports on these modules are used primarily for backbone interconnection of other high-performance switches and routers.
The 12-port 1000BaseTX Plus 2-Port 1000BaseX Gigabit Ethernet switching module, shown in Figure 5-11, provides 12 switched, 1000-Mbps, full-duplex ports over Category 5 UTP, using RJ-45 connectors.
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Note Category 5 cables must be used when connecting to the 1000BaseTX ports on the WS-X4412-2GB-T. |
The two additional Gigabit Ethernet ports can be configured with any combination of shortwave (SX), longwave/long-haul (LX/LH), and long range (ZX) GBICs. For a description of GBICs, see the "Installing, Removing, and Maintaining GBICs" section.
The two GBIC ports on the switching module (ports 13 and 14) are fully independent, nonblocking Gigabit Ethernet ports. Ports 1 through 16 are oversubscribed, which means that groups of ports may have a limit on the amount of data they can receive without dropping packets. The circuitry for ports 1 through 12 are multiplexed in three groups of four ports each:
The 18-Port Gigabit Ethernet switching module, shown in Figure 5-12, provides 18 Gigabit Ethernet ports. The 18-Port Gigabit Ethernet switching module ports use GBICs to interface to various Gigabit Ethernet configurations.
The Gigabit Ethernet ports can be configured with any combination of shortwave (SX), longwave/long-haul (LX/LH), and long range (ZX) GBICs. For a description of GBICs, see the "Installing, Removing, and Maintaining GBICs" section.
Ports 1 and 2 on the 18-Port Gigabit Ethernet switching module are fully independent, nonblocking Gigabit Ethernet ports. Ports 3 through 18 are oversubscribed, which means that the ports may have a limit on the amount of data they can receive without dropping packets. The circuitry for ports 3 through 18 are multiplexed in four groups of four ports each:
To help identify the groups, the front panel of the 18-Port Gigabit Ethernet switching module has lines that frame the port groups (see Figure 5-12).
The four ports within each group use common circuitry that multiplexes the group into a single, nonblocking, full-duplex Gigabit connection to the internal switch fabric. For each group of four ports, received frames are buffered and fed to the common Gigabit Ethernet link to the internal switch fabric. If the amount of received data for a port begins to exceed the buffer capacity, flow-controlled frames (pause frames) are sent to the port's linked device to temporarily stop traffic and prevent frame loss.
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Note If only one port within a group is connected, the flow-control feature may be disabled on that port. |
When transmitting, each port in the group shares the bandwidth of a Gigabit Ethernet link. However, each port operates independently so that flow control, or configuration of one port, does not block or degrade the performance of another port in that group.
When configuring a network using the 18-Port Gigabit Ethernet switching module, you should use ports 1 and 2 where nonblocking performance without flow control is needed, such as a connection to another internetworking device.
When the bandwidth of the switching module is not fully utilized, connect balancing port connections across port groupings to maximize available bandwidth. For example, connect ports from different groups, such as ports 3, 4, 11, or 12 (in any order) before you connect ports from the same group, such as ports 3 and 5, or ports 4, 6, and 8.
Follow these guidelines when configuring ports 3 through 18:
set port flowcontrol {send | receive} [mod_num/port_(3to18)] {on |off | desired}
For more information about the flow-control feature or autonegotiation, refer to the Software Configuration Guide for your switch. For details on how to cable and configure a Gigabit Ethernet port, see the "Installing, Removing, and Maintaining GBICs" section.
Each switching module has one STATUS LED that provides information about the module and one LINK LED for each port on the module. Figure 5-13 shows the Gigabit Ethernet port LEDs. Figure 5-14 shows the 10/100BaseT port LEDs. Table 5-2 describes the switching module LEDs.
| LED | State | Description |
|---|---|---|
STATUS |
| Indicates the results of a series of self-tests and diagnostic tests performed by the switch. |
| Green | All the tests pass. |
| Red | A test other than an individual port test failed. |
| Orange | System boot, self-test diagnostics running, or the module is disabled. |
LINK1 |
| Indicates the status of the 10BaseT port. |
| Green | The port is operational (a signal is detected). |
| Orange | The link has been disabled by software. |
| Flashing orange | The link has been disabled due to a hardware failure. |
| Off | No signal is detected. |
Port Status2 |
| Indicates individual port status. |
| Green | The port is operational (a signal is detected). |
| Orange | The link has been disabled by software. |
| Flashing orange | The link has been disabled due to a hardware failure. |
| Off | No signal is detected. |
| 1Used on the WS-X4232-L3 Ethernet routing module. 2LEDs labeled 1 through the number of ports on the switching module are the invididual port link LEDs. |
The Catalyst 4003 and 4006 switches allow you to remove and replace switching modules without powering down the switch. This feature is known as hot swapping.
When you remove or insert a switching module while the switch is powered on and operating, the system does the following:
1. Scans the backplane for configuration changes.
2. Initializes all newly inserted switching modules, notes any removed modules, and places them in the administratively shutdown state.
3. Places any previously configured interfaces on the switching module back to the state they were in when they were removed. Any newly inserted interfaces are put in the administratively shutdown state, as if they were present (but unconfigured) at boot time. If you insert a similar switching-module type into a slot, its ports are configured and brought online up to the port count of the original switching module.
The system runs diagnostic tests on any new interfaces. If the test passes, the system is operating normally. If the new switching module is faulty, the system resumes normal operation but places the new module in the "faulty" state.
If the diagnostic test fails, the system crashes, which usually indicates that the new switching module has a problem and should be removed.
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Caution To avoid erroneous failure messages, allow at least 15 seconds for the system to reinitialize, and note the current configuration of all interfaces before you remove or insert another switching module. |
When you hot swap switching modules, the system displays status messages on the console screen. The following example display shows the messages logged by the system when a switching module is removed from slot 2. If you use the show port command to query the module before reinstalling a module to replace the removed one, the system responds, "Module 3 is not installed." When the module is reinserted, the system recognizes the module as ready again.
Console> (enable) 1999 Sep 09 12:23:26 %SYS-5-MOD_REMOVE:Module 3 has been removed Console> (enable) 1999 Sep 09 12:23:44 %SYS-5-MOD_INSERT:Module 3 has been inserted Console> (enable) 1999 Sep 09 12:23:47 %SYS-5-MOD_OK:Module 3 is online Console> (enable)
This section describes how to install the supervisor engine and switching modules in the Catalyst 4003 and 4006 switches.
These tools are required to install supervisor engine and switching modules in the Catalyst 4003 and 4006 switches:
Whenever you handle the supervisor engine and switching modules, always use a wrist strap or other grounding device to prevent electrostatic discharge (ESD). For information on preventing ESD, refer to the Site Preparation and Safety Guide.
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Caution To prevent ESD damage, handle modules by the carrier edges only. |
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Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. |
To install the supervisor engine and switching modules in a Catalyst 4003 or 4006 switch, follow these steps:
Step 2 Choose a slot for the new module. Check that you have enough clearance for any interface equipment that you will connect directly to the switching-module ports.
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Note Supervisor engines must be installed in slot 1. |
Step 3 Loosen the captive installation screws securing the module filler plate (or the existing module) to the desired slot.
Step 4 Remove the module filler plate (or the existing module). Save the module filler plate for future use.
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Note If you are removing an existing module, see the "Removing the Modules" section. |
Step 5 To install the new module, hold the switching-module front panel with one hand, and place your other hand under the carrier to support the module, as shown in Figure 5-15. Do not touch the printed circuit boards or connector pins.
Step 6 Align the edges of the switching-module carrier with the slot guides on the sides of the switch chassis, as shown in Figure 5-15.
Step 7 Pivot the two module ejector levers out away from the faceplate, as shown in Figure 5-15.
Step 8 Carefully slide the switching module into the slot until the notches on both ejector levers engage the chassis sides.
Step 9 Using the thumb and forefinger of each hand, simultaneously pivot in both ejector levers, as shown in Figure 5-16, to fully seat the module in the backplane connector.
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Caution Always use the ejector levers when installing or removing modules. A module that is partially seated in the backplane will cause the system to halt and subsequently crash. |
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Note If you perform a hot swap, the console displays the message "Module n has been inserted." This message also appears if you are connected to the Catalyst 4003 or 4006 switch through a Telnet session. |
Step 10 Use a screwdriver to tighten the captive installation screw on each end of the module faceplate (see Figure 5-17).
Step 11 Attach network interface cables or other devices to the interface ports.
Step 12 Check the status of the module as follows:
a. Ensure that the STATUS LED is green (module operational).
b. When the switch is online, enter the show module command. Verify that the system acknowledges the new module and that the module's status is good.
Step 13 If the module is not operational, reseat it. If the module is still not operational, contact your customer representative.
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Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. |
To remove a module from a Catalyst 4003 or 4006 switch, follow these steps:
Step 2 Loosen the captive screws at each end of the module.
Step 3 Place your thumbs on the left and right ejector levers. Push the levers outward to release the module from the backplane connector.
Step 4 Grasp the module front panel with one hand, and place your other hand under the module to support and guide it out of the slot. Do not touch the printed circuit boards or connector pins.
Step 5 Pull the module straight out of the slot, keeping one hand under the module to guide it.
Step 6 Place the module on an antistatic mat, in an antistatic bag, or immediately reinstall it in another slot.
Step 7 If the slot is to remain empty, install a module filler plate to keep dust out of the chassis, to maintain proper airflow through the chassis, to contain electromagnetic interference (EMI) that might disrupt other equipment, and to prevent exposure to high current inside the chassis.
The Ethernet management port, located on the front panel of the Catalyst 4003 or 4006 switch supervisor engine, is shown in Figure 5-1 and Figure 5-2. The Ethernet management port uses an RJ-45 media-dependent interface crossed-over (MDIX) connector (see Figure 5-18).
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Note The MDIX ports are crossed over internally. For an MDI-to-MDI or MDIX-to-MDIX connection, use a crossover cable. For an MDI-to-MDIX connection, use a straight-through cable, which allows the Tx pins to connect with the Rx pins. |
See "Specifications," for port pinouts.
The console port, located on the front panel of the Catalyst 4003 or 4006 switch supervisor engine, is shown in Figure 5-1. The console port is a DCE DB-25 receptacle (Figure 5-19), which supports a DCE EIA/TIA-232 interface. EIA/TIA-232 supports unbalanced circuits at signal speeds up to 64 kbps.
See "Specifications," for port pinouts.
Use a null-modem cable to connect the switch to a remote DCE device, such as a modem or data service unit (DSU). Use a straight-through cable to connect the switch to a DTE device, such as a terminal or PC. Figure 5-20 shows the DCE and DTE cable connectors.
The following sections describe GBICs and how to install, remove, and maintain them.
GBICs are hot-swappable input/output devices that plug into a Gigabit Ethernet switching module, linking the module with the fiber-optic network. GBICs use SC-type connectors. The GBICs fit through cutouts in the front of the module and plug into connectors on the module. You can install any combination of GBICs in the Gigabit Ethernet switching module. The following GBIC media types are supported:
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Note A maximum of 12 1000BaseZX GBICs can be installed in a switch chassis. |
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Note Cisco 1000BaseLX/LH interfaces fully comply with the IEEE 802.3z 1000BaseLX standard. However, their higher optical quality allows them to reach 10 kilometers over SMF versus the 5 kilometers specified in the standard. |
Other GBIC media types may be supported as additional technology becomes available.
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Note Because of interoperability issues, Cisco does not support GBICs purchased from third-party vendors. |
GBICs are Class 1 laser products. Read the Site Preparation and Safety Guide for information related to working with lasers.
Figure 5-21 shows a GBIC.
Table 5-3 provides cabling specifications for the GBICs that you install in the Gigabit Ethernet modules. All GBICs have SC-type connectors, and the minimum cable distance for all GBICs listed (MMF and SMF) is 6.5 feet (2 meters).
| GBIC | Wavelength1 (nm) | Fiber Type | Core Size (microns) | Modal Bandwidth (MHz/km) | Cable Distance |
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SX2 | 850 | MMF | 62.5 | 160 | 722 ft (220 m) |
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| 62.5 | 200 | 902 ft (275 m) |
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| 50.0 | 400 | 1640 ft (500 m) |
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| 50.0 | 500 | 1804 ft (550 m) |
LX/LH | 1300 | MMF3 | 62.5 | 500 | 1804 ft (550 m) |
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| 50.0 | 400 | 1804 ft (550 m) |
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| 50.0 | 500 | 1804 ft (550 m) |
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| SMF | 9/10 | - | 32,810 ft (10 km) |
ZX | 1550 | SMF | 9/10 | - | 43.5 miles (70 km) |
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| SMF4 |
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| 62.1 miles (100 km) |
| 1Nominal fiber specification wavelength. 2MMF only. 3Patch cord required (refer to the "Patch Cord" section for details). 4Dispersion-shifted single-mode fiber-optic. |
Table 5-4 provides the GBIC optical power characteristics.
| Parameter | 1000BaseSX (WS-G5484) | 1000BaseLX/LH (WS-G5486) | 1000BaseZX (WS-G5487) |
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Transmitter output power (min/max) | 0/-9.5 dBm | -3/-9.5 dBm | 0/4.77 dBm |
Receiver maximum input power | 0 dBm | -3 dBm | -3 dBm |
Receiver sensitivity | -17 dBm | -19 dBm | -23 dBm |
Channel insertion loss |
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| 3.4 dBm | 4.4 dBm | n/a |
| 3.2 dBm | 6 dBm | n/a |
| n/a | 6.5 dBm | 21.5 dBm |
| 11 micron (µ) equals 1 micrometer or 10-6 meters |
You must observe the following optical-fiber cabling restrictions when cabling GBICs:
A module can be shipped with or without GBICs installed. If you need to install a GBIC, follow the procedures in this section.
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Caution Unnecessary removal or insertion of a GBIC can lead to premature failure of the GBIC. A GBIC has a lifetime of 100 to 500 removals and insertions. |
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Caution When removing or inserting a GBIC, always wear an ESD wrist strap connected to the ESD wrist strap connector. For more information about ESD, refer to the Site Preparation and Safety Guide. |
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Note GBICs are swappable online. |
To install a GBIC, follow these steps:
Step 2 Verify that the GBIC is the correct type for your network by checking the part number. The number indicates whether it is 1000BaseSX, 1000BaseLX/LH, or 1000BaseZX.
Step 3 Grip the sides of the GBIC with your thumb and forefinger; insert the GBIC into the slot on the front of the module. (See Figure 5-22.)
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Note GBICs are keyed to prevent incorrect slot insertion. |
Step 4 Slide the GBIC into the slot until you hear a click. The click indicates that the GBIC is locked into the slot.
Step 5 When you are ready to attach the fiber-optic cable, remove the plug from the GBIC and save it for future use.
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Caution Do not remove the plug from the GBIC optical bores or the fiber-optic cable until you are ready to connect the cable. The plug protects the GBIC optical bores and cable from contamination. |
Step 6 Remove the plug from the SC-type connector (see Figure 5-23) on the fiber-optic cable. Insert the connector into the GBIC.
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Note When you plug the SC-type connector into the GBIC, make sure that both the Tx and Rx fiber-optic cables are fully inserted into the SC-type connector. |
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Note If you are using the LX/LH GBIC with MMF, you need to install a patch cord between the GBIC and the MMF cable. See the "Patch Cord" section for details. |
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Note If you are removing the GBIC from an online switch, enter the show port command to verify the type of GBIC that is installed. |
To remove a GBIC, follow these steps:
Step 2 Release the GBIC from the slot by simultaneously squeezing the plastic tabs (one on each side of the GBIC).
Step 3 Slide the GBIC out of the slot.
Step 4 Install the plug in the GBIC optical bores, and place the GBIC in protective packaging.
Follow these GBIC maintenance guidelines:
When using the LX/LH GBIC with a 62.5-micron diameter MMF, you must install a mode-conditioning patch cord (Cisco product number. CAB-GELX-625 or equivalent) between the GBIC and the MMF cable on both the transmit and receive ends of the link. The patch cord is required for link distances greater than 984 feet (300 meters).
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Note We do not recommend using the LX/LH GBIC with MMF without a patch cord for very short link distances (tens of meters). The result could be an elevated bit error rate (BER). |
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Note The patch cord is required to comply with IEEE standards. The IEEE found that link distances could not be met with certain types of fiber-optic cable due to a problem in the center of some fiber-optic cable cores. The solution is to launch light from the laser at a precise offset from the center by using the patch cord. At the output of the patch cord, the LX/LH GBIC is compliant with the IEEE 802.3z standard for 1000BaseLX. For a detailed description of this problem, refer to "Differential Mode Delay." |
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Note Cisco Gigabit Ethernet products have been tested and evaluated to comply with the standards listed in "Specifications." Equivalent cables should also meet these standards. |
Figure 5-24 shows a typical configuration using the patch cord.
Plug the end of the patch cord labeled "To Equipment" into the GBIC (see Figure 5-25). Plug the end labeled "To Cable Plant" into the patch panel. The patch cord is 3 meters (9.84 feet) long and has duplex SC-type male connectors at each end.
When all interfaces are connected, check all connections, and then perform the following steps to power on the system and verify that it is operational:
Step 2 Check the console terminal and make sure it is on.
Step 3 Connect the power supply power cords to the source AC outlets. At the power-source end of the power cord, make sure the connector is installed securely in a grounded outlet and that the source power is within the range labeled on the back of the switch. When two power supplies are present, make sure that the second cord is connected to a separate line from the first, if possible.
Step 4 Verify that the GOOD LEDs on the power supply front panels are green.
Step 5 Listen for the system fans to ensure that they are operational.
Step 6 While the system initializes, check that the STATUS LED on the supervisor engine is orange until the boot is complete.
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Note Many of the module port LEDs are not on until you configure the interfaces. |
When the system boot is complete (it takes a few seconds), the supervisor engine begins to initialize the switching modules.
During this initialization, the LEDs on each module function differently (most flash on and off). The STATUS LED on each module goes on when initialization is complete, and the console screen displays a script and system banner.
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Note When switching module LEDs are on, this does not necessarily mean that the interface ports are functional or enabled. Although the LEDs for many interface types go on at the initial system startup, they do not indicate an accurate status until the interface is configured. |
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Note If the system does not complete this verification process, see "Troubleshooting the Installation." |
Posted: Mon Jun 12 17:34:44 PDT 2000
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