· Noncompliant operating environment might cause router failure. You need to clean your router periodically and make sure the installation environment meets the requirements (see "Preparing for installation").

· Periodically perform power-on test on standby devices.

Troubleshooting methods

When your router fails, you can use the following methods to troubleshoot the router:

· At the CLI, you can use related commands to display hardware information, and locate hardware failures.

· The MPU provides LEDs for the fan trays, power supplies, and modules. You can locate the failures according to the LED status on the MPU. For more information about the MPU LEDs, see H3C CR19000-20 Core Router Hardware Information and Specifications.

· The MPUs and interface modules provide port status LEDs, with which you can detect port failures. For more information about port status LEDs, see H3C CR19000-20 Core Router Hardware Information and Specifications.

If you cannot locate failures by following the guidelines in this chapter, contact the local agents or technical support engineers. For more information, see "Technical support."

Configuration terminal display issues

No display on the configuration terminal

Symptom

The configuration terminal does not display any output when the router is powered on.

Solution

To resolve the issue:

1. Verify that the power supply system is operating correctly.

2. Verify that the MPU is operating correctly.

3. Verify that the console cable connects the console port on the MPU correctly.

4. Verify that the console cable connects to the correct serial port on the terminal.

5. Verify that the console cable is in good quality and is operating correctly.

6. Verify that the following settings are configured for the terminal:

¡ Baud rate—9600.

¡ Data bits—8.

¡ Parity—None.

¡ Stop bits—1.

¡ Flow control—None.

¡ Emulation—VT100.

7. If the issue persists, contract H3C support.

Garbled display on the configuration terminal

Symptom

The configuration terminal displays garbled output when the router is powered on.

Solution

To resolve the issue:

1. Verify that the following settings are configured for the terminal:

¡ Baud rate—9600.

¡ Data bits—8.

¡ Parity—None.

¡ Stop bits—1.

¡ Flow control—None.

¡ Emulation—VT100.

2. If the issue persists, contact H3C Support.

System failures during operation

Symptom

A system failure occurs when the router is operating.

Solution

To resolve the issue:

1. Execute related commands to locate the fault.

2. If a configuration error is found, re-configure the settings or restore the factory-default settings.

For more information, see H3C CR19000 Core Routers Fundamentals Configuration Guide.

3. If the issue persists, contact H3C Support.

Power supply failure

Symptom

The LEDs for the power supply are in the following states:

· On the MPU, the PWR OK LED is off and the PWR FAIL LED is on.

The PWR OK LED is on and the PWR FAIL LED is off only when all the power supplies are operating correctly. When a power supply is faulty, the OK LED is off and the FAIL LED is on.

· On the power supply, the INPUT OK LED or the OUTPUT OK LED is red.

For more information about the LEDs, see H3C CR19000-20 Core Router Hardware Information and Specifications.

NOTE:

After a power supply is removed from the router, the input and output LEDs on the power supply stay on for several seconds.

Solution

To resolve the issue:

1. Verify that the power supply model is compatible with the router.

The PSR3000B-54AHD and PSR2000B-54D power supplies are available for the router.

2. Verify that the power supply system is supplying power correctly and the output voltage is at the acceptable range.

3. Verify that the installed power supplies can meet the system power requirements.

4. Verify that the power supply does not have issues such as output short circuit, output overcurrent, output overvoltage, input undervoltage, or overtemperature. You can determine the power supply status by observing the LEDs on the power supply. For information about the power supply LEDs, see H3C CR19000-20 Core Router Hardware Information and Specifications.

5. If the issue persists, contact H3C Support.

Fan tray failure

WARNING!

Ensure electricity safety when you hot swap a fan tray.

CAUTION:

· The router provides 33 fan tray slots. For good cooling performance, install fan trays in all fan tray slots. If a fan tray fails, replace it with a new fan tray. After the faulty fan tray is repaired, you can reinstall it. Failure of one fan tray does not affect the overall heat dissipation. However, to ensure adequate heat dissipation, make sure the fan trays for the modules that are processing services operate correctly.

· Before powering on the router, make sure all fan tray slots are installed with fan trays correctly.

· The fan trays in the top four rows (FAN 1 to FAN 12), in the middle three rows (FAN 13 to FAN 21), and in the bottom four rows (FAN 22 to FAN 33) power up after a three-second delay, a two-second delay, and a four-second delay, respectively upon power-up of the router. Before a fan tray powers up, its OK/FAIL LED is red.

Symptom

The LEDs for the fan tray are in the following states:

· On the MPU, the FAN OK LED is off and the FAN FAIL LED is on.

· On the fan tray, the OK/FAIL LED is off or red.

Solution

To resolve the issue:

1. If all the LEDs are off, verify that the power supplies are operating correctly and the router is connected correctly to the power switches. For more information, see "Power supply failure."

2. Execute the display fan command in any view to display the operating state of the fan tray and rectify the fault. The command output displays the following information:

¡ Whether the fan tray is present.

¡ Number of fans in the fan tray.

¡ Operating status of each fan.

¡ Fan speed.

3. Verify that the air inlet and outlet vents of the chassis are not blocked. If they are blocked, clean them to keep good ventilation.

4. Remove and reinstall the fan tray to make sure it is installed securely in the slot.

5. Verify that the empty service slots and power supply slots are installed with filler panels. Install filler panels in empty slots.

6. Replace the fan tray.

7. If the issue persists, contact H3C Support.

MPU failure

Symptom

The RUN LED for the MPU is off.

Solution

To resolve the issue:

1. Verify that the power system is operating correctly. For more information, see "Power supply failure."

2. Remove and reinstall the MPU to make sure it is installed securely. For more information, see "Installing MPUs."

3. Press the RESET button on the MPU to reset the MPU. After the MPU is reset, verify that the RUN LED is on.

4. If the router has empty MPU slots, install the MPU in the empty MPU slot, and verify that the MPU can operate correctly.

5. If the issue persists, contact H3C Support.

NOTE:

The MPU, fabric module, and interface module slot numbers are marked on the ejector lever pillow blocks at the slot edges.

Fabric module failure

Symptom

The RUN LED on the fabric module is off or steady red.

Solution

To resolve the issue:

1. Verify that the MPU and the fan trays are operating correctly. For more information, see "MPU failure" and "Fan tray failure."

2. Verify that the fabric module is compatible with the system software. Upgrade the system software if it does not support the fabric module.

3. Calculate the total power consumption, and make sure your power supplies can provide enough power. For more information, see H3C CR19000-20 Core Router Hardware Information and Specifications.

4. Remove and reinstall the fabric module to make sure the module is installed securely. You also need to verify that the ejector levers are locked securely in place. For more information, see "Installing fabric modules."

5. If the router has empty fabric module slots, install the module in an empty fabric module slot. If the module operates correctly, the previous slot is faulty.

6. If the issue persists, contract H3C Support.

Interface module failure

Symptom

The RUN LED on the interface module is off or steady red.

Solution

To resolve the issue:

1. Verify that the MPU is operating correctly. For more information, see "MPU failure."

2. Verify that the interface module is compatible with the system software. Upgrade the system software if it does not support the interface module.

3. Calculate the total power consumption, and make sure your power supplies can provide enough power. For more information, see H3C CR19000-20 Core Router Hardware Information and Specifications.

4. Remove and reinstall the interface module to make sure it is installed securely. For more information about installing an interface module, see "Installing interface modules."

5. If the router has empty interface module slots, install the interface module in an empty interface module slot. If the interface module operates correctly, the previous slot is faulty.

6. If the issue persists, contact H3C Support.

Interface failure

Symptom

The LED for the interface is off.

NOTE:

A management Ethernet port has a LINK/ACT LED. When the LINK/ACT LED is off, the management Ethernet port fails.

Solution

To resolve the issue:

1. Make sure the MPU or interface module where the interface resides operates correctly. For more information, see "MPU failure" or "Interface module failure."

2. Verify that the cable is connected correctly. For how to correctly connect a cable, see "Connecting cables."

3. Verify that the cable is in good condition. Use the cable to connect two interfaces of the same type that operate correctly. If the LEDs of the two interfaces are on, the cable is in good condition. If the LEDs are off, the cable is faulty. Replace the cable.

4. If the interface uses a transceiver module, perform the following tasks:

a. Make sure the transceiver module is compatible with the interface and the cable.

b. Replace the transceiver module.

5. Verify that the speed and duplex settings of the interfaces on the two ends are the same.

6. If the issue persists, contact H3C Support.

NOTE:

· If an interface is brought down by the shutdown command, use the undo shutdown command to bring up the interface.

· After an interface fails, you can connect the cable to an idle interface of the same type (if any) on the router.

Technical support

Before contacting H3C Support, prepare the following information:

· Arrival time of the router.

· Serial number of the chassis (on the label at the right of the rear panel).

· Software version, which you can view by using the display version command.

· Maintenance agreement or warranty card.

· Brief issue description.

· Brief explanation of the troubleshooting measures that have been taken.

You can contact H3C Support through the phone, H3C website, or email.

Phone: 400-810-0504

Website: http://www.h3c.com

E-mail: [email protected]

H3C CR19000-20 Core Router Installation Guide-6W103

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