3COM 8810 (01) PDF Document

To avoid bodily injury and device impairment, please follow these safety recommendations when working with your 3COM 8810.

General Safety:

• The 3COM 8810 uses redundant PSUs. Turn off all PSUs and remove all power cords before opening the chassis.

• Keep the chassis clean and dust-free.

• Keep the chassis and installation tools away from walk areas.

Against Electricity:

• Check your work area for hazards like ungrounded power extension cables, missing safety grounds, and moist floors.

• Locate the emergency power-off switch in the room before you begin installation.

• Unplug all power cords and external cables before moving the chassis.

• Do not perform maintenance on the equipment alone when it is powered on.

• Always verify that power has been disconnected from a circuit; never assume.

• Do not place the switch on a moist area or allow liquid to flow into it.

When Moving the 3COM 8810:

• The 3COM 8810 is heavy. Remove all external cables before moving the chassis.

• Do not move the switch alone. Work with another person.

• Move the switch slowly and stably. Avoid sudden movements or twisting your body.

• When moving, only hold the handles at both sides of the chassis. Do not use the plastic panel, fan frame handle, PSU handles, or air vents, as they are not designed to bear the weight of the chassis.

Against Laser:

• Some I/O modules have optical interfaces. Do not stare into an open optical interface, as the laser being transmitted is invisible and can cause eye damage.

To prevent electrostatic discharge (ESD) from damaging electronic components on your 3COM 8810, follow these steps to use an ESD-preventive wrist strap:

Step 1. Wear the wrist strap on your wrist.

Step 2. Lock the wrist strap tight around your wrist to ensure good contact with your skin.

Step 3. Insert the strap’s connector into the designated ESD hole in the chassis or attach its alligator clip to a grounding screw on the chassis.

Step 4. Make sure the ESD-preventive wrist strap is well grounded. The resistance reading should be in the range of 1 to 10 Mohm between your body and the ground.

Always wear the ESD-preventive wrist strap when handling parts, especially circuit boards. Hold circuit boards by their edges and avoid touching components.

The 3COM 8810 must be installed indoors in a fixed place. To ensure normal operation and a long service lifetime, the installation site must meet the following requirements:

Temperature and Humidity:

• Operating Temperature: 0 to 40°C (32 to 104°F)

• Operating Humidity (non-condensing): 10% to 90%

• Storage Temperature: -10 to 70°C (14 to 158°F)

• Storage Humidity: 10% to 90%

Cleanness:

The equipment room must be clean to prevent dust accumulation, which can cause poor contact or electrostatic absorption. The dust content and harmful gas limits are specified in the tables below.

Anti-Static Requirements:

• Use effective measures against electrical net interference for the power supply system.

• Separate the switch’s working ground from the power supply’s grounding device or lightning-protection grounding device as much as possible.

• Keep the switch away from radio launchers, radar, and high-frequency, high-current devices.

Grounding Requirements:

A good grounding system is essential for stable operation, lightning protection, and ESD prevention.

Space Requirements:

Maintain at least one meter of clearance at the front and rear of the switch cabinet for ventilation and maintenance. The equipment room should have a clear height of more than 3 meters.

Cabinet-Mounting Requirements:

• An open cabinet is preferred. If a closed cabinet is used, ensure it has a good ventilation system.

• The cabinet must be stable and able to support the weight of the switch and its accessories.

• Ensure the switch fits the cabinet’s size, with clearance on the left and right for ventilation.

The following tools are required for the installation of the 3COM 8810. Note that these tools are not shipped with the switch.

Before beginning, ensure you have read the installation preparation chapter and that all requirements have been met. The general installation flow for the 3COM 8810 is as follows:

1. Confirm all preparations are complete.

2. Check the installation site to ensure it meets environmental and space requirements.

3. Install the cabinet.

4. Install the switch chassis and other components (like shelves) into the cabinet.

5. Connect the PGND (protective ground) wire and the power cord.

6. If using Power over Ethernet (PoE), install the power distribution box in the cabinet.

7. Install the cabling rack and fan tray.

8. Insert the I/O modules or Application modules into their respective slots.

9. Connect the interface cables to the I/O modules or Application modules.

Follow these steps to install your 3COM 8810 in a 19-inch cabinet:

Step 1. Confirm that the cabinet is well-fixed and that there are no obstructions inside or around it. Ensure the switch is near the cabinet and ready for installation.

Step 2. Mount a shelf inside the cabinet at the desired position for the switch.

Step 3. Install the cabling rack and attach the mounting ears (shipped with the switch) onto the switch.

Step 4. With another person, carry the switch by its side handles slowly to the front of the cabinet.

Step 5. Lift the switch slightly higher than the cabinet shelf, place it on the shelf, and then push it into the cabinet.

Step 6. Align the mounting ears with the square holes in the posts of the cabinet, and fasten the screws in the holes to secure the switch.

For the safety of operators and equipment, the 3COM 8810 must be well grounded. The resistance between the switch chassis and the ground must be less than 1 ohm.

Connecting the PGND (Protective Ground) Wire:

1. Remove the screw from the grounding hole in the switch chassis.

2. Place the connector of the PGND wire (included with the switch) onto the grounding screw.

3. Insert the grounding screw back into the grounding hole and tighten it.

4. Connect the other end of the ground wire to the ground bar of the equipment room or another suitable grounding point. The grounding screw is located on the rear panel.

Connecting the AC Power Cord:

1. Make sure the power switch on the Power Supply Unit (PSU) is in the OFF position.

2. On the front panel of the AC PSU, turn the plug-retention clamp to the right.

3. Insert the plug at one end of the AC power cord into the socket on the PSU.

4. Turn the clamp to the left until it grips the plug securely.

5. Insert the other end of the power cord into an external power socket.

The I/O and Application modules for the 3COM 8810 are hot-swappable. The installation procedure is the same for both types of modules.

Step 1. Wear a grounded ESD-preventive wrist strap and take the I/O module out of its packing bag.

Step 2. In the slot where you plan to install the module, unscrew the mounting screws holding the blank filler panel and remove it. Keep the panel for future use.

Step 3. Hold the ejector levers on the module with both hands and pull them outward. Align the I/O module with the guides in the chassis and slide it gently into the slot until the positioning pin of the module touches the hole in the chassis.

Step 4. Pull the ejector levers inward to lock the positioning pin into the hole.

Step 5. Secure the I/O module by fastening its mounting screws with a screwdriver.

The console cable is an 8-core shielded cable with an RJ-45 connector on one end and both DB-9 and DB-25 female connectors on the other. Follow these steps to connect it:

Step 1. Plug the DB-9 or DB-25 female connector of the console cable into the serial port of the PC or terminal that will be used for configuration.

Step 2. Connect the RJ-45 connector of the console cable to the console port on the 3COM 8810 fabric module.

The pinouts for the console cable are as follows:

Proper cable management is crucial for reliable operation of your 3COM 8810. Follow these requirements:

• Bundle and route cables inside the cabinet in a straight and neat way. Avoid intertwinement or sharp bends.

• The bending radius of a cable should be at least 5 times its diameter where it exits a connector, and at least twice its diameter along its body.

• Cable different types of cables (power, signal, ground) separately. If they must be close, you can cross them. For parallel cabling, maintain a space of at least 30 mm (1.2 in) between power and signal cables.

• Ensure cable binding racks and channels are smooth and free of sharp edges.

• Use appropriate ties to bundle cables. Do not join ties together.

• After bundling, cut the extra parts of the ties neatly, leaving no sharp tips.

• Tie cables just outside of any bent sections to avoid stress on the cable core.

• Fold and bundle spare or excessive cable lengths in a location where they will not interfere with operation or be damaged.

• Do not tie power cords to the guides of any mobile components.

After installing the 3COM 8810, and before turning on the power, verify the installation by checking the following list to ensure all results are normal.

Specifically, you should ensure that:

• The switch is stable enough.

• All boards (modules, fan tray, PSUs) have been correctly installed.

• All communication cables, fibers, power cords, and grounding wires are correctly connected.

• The proper power voltage is used as required by the switch.

• The Console cable has been correctly connected, the PC or terminal for configuration is in service, and all the required terminal parameters have been set.

To configure your 3COM 8810, you need to connect a terminal (such as a PC running terminal emulation software) using a console cable.

Connecting the Cables:

1. Insert the DB-9 (or DB-25) female connector of the Console cable into the serial port on the PC.

2. Insert the RJ-45 connector of the cable into the Console port on the switch.

Setting the Terminal Parameters:

You must set the terminal emulation software with the following parameters:

• Baud rate: 9600

• Data bits: 8

• Parity: None

• Stop bits: 1

• Flow control: None

• Terminal emulation: VT100

For example, using HyperTerminal on Windows:

1. Go to Start → Programs → Accessories → Communications → HyperTerminal.

2. Create a new connection, giving it a name.

3. In the “Connect using” field, select the COM port to which the console cable is connected.

4. Set the port settings as listed above (9600, 8, None, 1, None).

5. Go to File → Properties, click the Settings tab, and select VT100 for terminal emulation.

If the console terminal does not display anything or displays illegible characters after you power on the 3COM 8810, follow these troubleshooting steps.

If the console displays nothing:

First, check that:

• The power system is working normally.

• The fabric module is working normally.

• The console cable is connected to the console port on the fabric.

If there are no issues with the above, the problem is likely one of the following:

• The console cable is not connected to the correct serial port on your terminal/PC.

• The console terminal parameters are incorrect. Ensure the settings are: baud rate 9600, data bits 8, parity None, stop bits 1, flow control None, and terminal emulation VT100.

• The console cable is faulty.

If the console displays illegible characters:

This is most likely due to a console terminal setting error. Verify that the terminal parameters match the required settings listed above.

You can troubleshoot the PSU on your 3COM 8810 by observing its LEDs and system commands.

Display Power Command Indicates the PSU is Not in Position

If the Input LED (green) and Output LED (green) are ON, but the `display power` command shows the PSU is not in position, it may be badly seated. To fix this:

1. Switch off the power supply.

2. Loosen the screws on the PSU.

3. Push the PSU firmly into the chassis.

4. Tighten the screws.

5. Switch on the power supply to check if the state is normal.

The Input LED (green) and Output LED (green) are OFF

Check that the power cords are connected correctly, are in good condition, and the power switch is in the ON position.

The Fail LED (red) is ON

Check that:

• The correct power voltage is in use (90 to 264VAC, 50-60 Hz for AC PSU).

• The air filter protecting the fan tray is clean. Excessive dust can block ventilation and cause power supply failure.

If the problem persists, do not disassemble the PSU yourself; contact technical support.

The PSU in the 3COM 8810 is hot-swappable. The PSU is heavy, so handle it with care.

Removing an AC PSU:

1. Change the power switch on the PSU from the ON position to the OFF position.

2. Pull the clamp holding the power cord connector to the right and unplug the power cord.

3. Unscrew the captive screws on both sides of the PSU panel with a flathead screwdriver.

4. Hold the handle of the PSU and pull it gently out of the chassis along its guides.

If you are not installing a replacement immediately, insert a blank filler panel to maintain proper airflow and prevent dust entry.

Installing an AC PSU:

1. Hold the handle of the PSU with one hand and support the bottom with the other. Gently slide the PSU into the chassis along the guides until it is secure in the backplane.

2. Fasten the captive screws on both sides of the PSU panel with a flathead screwdriver.

3. Ensure the power switch on the panel is in the “OFF” position.

4. Insert the AC power cord into the socket on the PSU.

5. Push the clamp down to secure the power cord.

It is recommended to clean the air filters semimonthly to guarantee adequate ventilation. There are filters for both the PSU and the chassis.

Removing and cleaning the PSU air filter:

1. Hold the air filter by its upper and lower edges.

2. Gently pull the air filter out of the chassis.

3. Take the black air filter mesh out of the cover.

4. Clean and dry the mesh (do not rub it).

5. Place the dry black mesh back into the air filter cover and insert it back into the PSU.

Removing and Cleaning the Chassis’s Air Filter:

1. Unscrew the screws at the top and bottom of the air filter with a flathead screwdriver.

2. The chassis air filter is long. Hold its front end with one hand and support its weight from underneath with the other hand as you slide it out along the guides.

3. Directly wash the entire filter assembly (without removing the mesh), allow it to air dry, and then insert it back into the chassis.

Installing the Chassis’s Air Filter:

1. Support the long air filter from underneath as you align it with the guides and slide it into the chassis.

2. Fix the air filter by fastening the screws at the top and bottom with a flathead screwdriver.

You can update the software on the 3COM 8810 using several methods. The general procedure is as follows:

1. Confirm that the host program is loaded before starting the upgrade.

2. Check the current version of the host and Boot ROM programs.

3. Back up the current host program, Boot ROM program, and configuration file to your PC in case you need to roll back.

4. Load the new host and Boot ROM program files to the switch. If the switch has two fabrics, you can copy the files to the standby fabric.

5. Upgrade the Boot ROM program on the fabric and I/O modules (optional).

6. If the switch has two fabrics, specify the load programs for the active and standby fabrics.

7. Reboot the switch.

8. Check that the board version is correct.

9. You can load the software through the command line interface (CLI) using FTP or TFTP, or locally from the Boot menu using XModem, TFTP, or FTP.

To upgrade the software using the XModem protocol through the console port, you must first enter the Boot Menu.

1. Reboot the switch and press Ctrl+B within five seconds of seeing the “Press Ctrl+B to enter Boot Menu…” prompt.

2. Enter the Boot ROM password (the default is no password) to access the MAIN MENU.

3. At the MAIN MENU, type 4 and press Enter to go to the SERIAL SUBMENU.

4. In the SERIAL SUBMENU, type 4 and press Enter to modify the serial interface boot parameter.

5. Select a new baud rate for the transfer (e.g., 5 for 115200 bps) and press Enter.

6. Change the baud rate on your console terminal to match your selection. You may need to disconnect and reconnect the terminal session.

7. Press Enter to continue. The SERIAL SUBMENU will be displayed again.

8. Choose where to store the downloaded file. For example, enter 2 to download the file to the switch’s Flash memory, then press Enter. The switch will display “XMODEM downloading …CCC”.

9. In your terminal software, initiate a file transfer (e.g., Transfer > Send File).

10. Browse to and select the application file you want to upload.

11. Set the transfer protocol to XModem and click Send.

12. After the download is successful, the system will write the data to the Flash memory and return to the SERIAL SUBMENU.

If you encounter problems during a software upgrade on your 3COM 8810, here are some common issues and solutions:

No response from the fabric serial interface

• Make sure the serial interface cable is in good condition and that its attributes (baud rate, data bits, etc.) are set correctly on your terminal.

Uploading the configuration file or host program using FTP fails

Check that:

• The network configuration (IP addresses, etc.) is correct and the FTP server is started.

• The switch’s Flash memory has enough space for the target files.

The configuration did not save during the I/O module reboot

• Before saving the configuration, you must check the operating status of the I/O module. Do not save the configuration while an I/O module is rebooting, as the configuration may be lost.

I/O module program loading fails or you cannot register for a long period

• Check that the I/O module type is supported on the current host program.

• Check that the I/O module Boot ROM program matches the host program.

• Check that the I/O modules are well seated.

• Try inserting the I/O module into other slots to check if the module itself is defective.

Insufficient Flash memory

• Empty the recycle bin when the I/O module starts.

• Delete any unused files in the Flash.

If you lose the switch’s Super password or Boot ROM password for your 3COM 8810, you should contact your local support representative for assistance.

If you are connecting an outdoor network cable to your 3COM 8810, you should install a lightning arrester to prevent damage from lightning strikes. A lightning arrester is not shipped with the switch and must be purchased separately. Required tools include a screwdriver, multimeter, and wire cutter.

Installation Procedure:

1. Use the provided double-faced adhesive tape to stick the arrester onto the switch’s chassis, as close as possible to the grounding screw.

2. Cut the arrester’s ground wire to the proper length to reach the switch’s grounding screw.

3. Securely tighten the ground wire to the switch’s grounding screw.

4. Use a multimeter to verify that the arrester’s ground wire has a proper connection to the chassis’s grounding screw.

5. Following the arrester’s instructions, connect the cables. The outdoor network cable should plug into the arrester’s ‘IN’ end, and a separate cable should connect from the arrester’s ‘OUT’ end to the switch’s network port.

6. Use nylon ties to bundle the cables neatly.

Installation Precautions:

• Ensure the ground wire is as short as possible and has proper contact.

• If the switch has multiple network ports connected to outdoor cables, you must install lightning arresters for all of them.