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February 8, 1999
Use the following publications with this document:
These installation notes describe the functional and physical features of the switched uplink modules for the FastHub 400 models. This document also provides installation and cabling procedures, troubleshooting information, and technical specifications.
Notes, cautions, and warnings use the following conventions and symbols:
 | Caution This caution symbol means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data. |
 | Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. (To see translations of the warnings that appear in this publication, refer to the FastHub 400 10/100 Series Installation and Configuration Guide.) |
The switched uplink modules have these key features:
The 10BaseT/100BaseTX switched uplink module, hereafter referred to as the 10/100 switch module, has a switched 10/100 autosensing port (Figure 1). By default, the port autonegotiates the transmission speed and duplex mode. You can set the port to 10 or 100 Mbps and to half- or full-duplex mode.
The 10/100 switch module has LEDs (STAT, DUP, and 100) that reflect the status, duplex mode, and speed of the module port. These LEDs are described later in this section.
The 10/100 switch module complies with IEEE 802.3 10BaseT and IEEE 802.3u 100BaseT standards. The port uses a standard RJ-45 connector. Attached devices must be within 100 meters of the port and be either 10BaseT- or 100BaseTX-compatible. (See the FastHub 400 10/100 Series Installation and Configuration Guide for details on the port connector.)
The colors of the STAT LED show the status of the module port (Table 1).
| Color | Status |
|---|---|
Off | No link. |
Solid green | 10BaseT or 100BaseTX link operational. |
Flashing green | 10BaseT or 100BaseTX link operational (with activity). |
The colors of the DUP LED show that the module port is operating in either half- or full-duplex mode (Table 2).
| Color | Status |
|---|---|
Off | Operating in half-duplex mode. |
Solid green | Operating in full-duplex mode. |
The colors of the 100 LED show that the module port is operating in either 10 or 100 Mbps (Table 3).
| Color | Status |
|---|---|
Off | Operating at 10 Mbps. |
Solid green | Operating at 100 Mbps. |
The 100BaseFX switched uplink module, hereafter referred to as the 100BaseFX switch module, has a switched 100BaseFX port for 100-Mbps fiber-optic connectivity (Figure 2). By default, the port operates in half-duplex mode. However, you can set the port to full-duplex operation.
The 100BaseFX switch module has LEDs (LINK and DUP) that reflect the status and duplex mode of the module port. These LEDs are described later in this section.
The port complies with the IEEE 802.3u 100BaseT standard and uses 50/125- or 62.5/125-micron multimode fiber-optic cabling with a duplex SC connector. When set to full-duplex mode, the 100BaseFX module port can connect to another 100BaseFX-compatible device over distances of up to 2 kilometers. In half-duplex mode, the module port can connect to other compatible devices over distances of up to 412 meters.
The colors of the LINK LED show the status of the module port (Table 4).
| Color | Status |
|---|---|
Off | No link. |
Solid green | 100BaseFX link operational. |
Flashing green | 100BaseFX link operational (with activity). |
The colors of the DUP LED show that the module port is operating in either half- or full-duplex mode (Table 5).
| Color | Status |
|---|---|
Off | Operating in half-duplex mode. |
Solid green | Operating in full-duplex mode. |
You can install either switched uplink module in the expansion slot on the rear panel of the hub.
| Warning Class 1 laser product. |
| Warning Avoid exposure to the laser beam. |
| Caution When installing a 100BaseFX switched uplink module, do not remove the rubber plugs from the fiber-optic port or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the fiber-optic port and cable from contamination. |
| Caution The modules are not hot-swappable. Be sure to power off the hub before installing a module in the hub or removing it. |
To install a module, follow these steps:
Step 1 Power off the hub.
Step 2 Remove and set aside the screws attaching the faceplate to the expansion slot. The screws will be used later in Step 6.
Step 3 Remove the faceplate and store it for future use.
Step 4 Slide the module into the slot card-guides until you feel it touch the back of the hub.
Step 5 Push the module firmly until it snaps into place and is firmly seated. Figure 3 shows a 10/100 switch module being installed.
Step 6 Insert and tighten the screws on the module faceplate.
Step 7 Power on the hub.
Step 8 Connect the module port to a device as described in the "Connecting to the Module Port" section.
| Caution The modules are not hot-swappable. Be sure to power off the hub before installing a module in the hub or removing it. |
To remove a module, follow these steps:
Step 1 Power off the hub.
Step 2 Disconnect the cable from the module port.
Step 3 Loosen the screws attaching the module to the hub.
Step 4 Pull the module out of the slot.
Step 5 Replace the blank faceplate over the slot.
Step 6 Insert and tighten the screws on the faceplate.
Step 7 Power on the hub.
| Warning Class 1 laser product. |
| Warning Avoid exposure to the laser beam. |
| Caution When installing a 100BaseFX switched uplink module, do not remove the rubber plugs from the fiber-optic port or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the fiber-optic port and cable from contamination. |
Insert a connector according to the type of module (10/100 or 100BaseFX), as follows:
Use Table 6 to identify problems with the modules and take the appropriate corrective action.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
Incorrect speed settings for 10-Mbps and 100-Mbps connections. |
| |
Cabling distance exceeded. Port statistics show excessive FCS, late-collision, or alignment errors. For 100BaseTX connections:
For 10BaseT connections: The distance between the port and the attached device exceeds 100 meters. |
Reduce the cable length to within the recommended distances. See your 100BaseT repeater documentation for cabling guidelines.
Reduce the cable length to within the recommended distances.
| |
Bad adapter in attached device. Excessive errors found in port statistics. |
Run the adapter card diagnostic utility. | |
Module was not correctly installed. | Ensure the module is firmly in place in the expansion slot and the screws are inserted and tightened. | |
The switched uplink module is experiencing excessive flooding of unicast packets. | Switched uplink module might have reached the maximum 1536 MAC addresses in memory and needs to be cleared. | Reset the installed switched uplink module to clear the address table. |
No connectivity | Incorrect or bad cable.
|
See the FastHub 400 10/100 Series Installation and Configuration Guide for the correct pinouts and the proper use of crossover vs. straight-through cables. Replace with a known good cable. |
Port LED off | Devices not powered up. | Ensure both devices have power. |
Cable connection loose. | Verify the connection at both ends of cable. | |
Wrong cable type. | Verify the cable type (crossover vs. straight-through). | |
Incorrect wiring. | See the FastHub 400 10/100 Series Installation and Configuration Guide for pinout information. | |
Faulty cable. | Replace the cable with a known good one. | |
Port LED solid amber | Port not forwarding. The port might be disabled by management, or the device at other end is malfunctioning. |
Enable the port through in-band or out-of-band management. Investigate the device that is connected to the disabled port on the hub. |
Table 7 provides the technical specifications for the switched uplink modules.
| Physical Dimensions |
| |
| 1 lb (0.45 kg) | |
| 5.52 x 3.15 x 0.126 inch (114.8 x 80 x 32 cm) | |
| Environmental Requirements |
| |
| Storage temperature | -13 to 158ºF (-25 to 70ºC) |
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