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Maintaining ACX4000 Components

 

Routine Maintenance Procedures for the ACX4000 Router

Purpose

For optimum router performance, perform preventive maintenance procedures.

Action

  • Inspect the installation site for moisture, loose wires or cables, and excessive dust. Make sure that airflow is unobstructed around the router and into the air intake vents.

  • Check the status-reporting devices on the font panel—system LED.

Maintaining Cables That Connect to ACX4000 Network Ports

Purpose

For optimum router performance, verify the condition of the cables that connect to the network ports.

Action

On a regular basis:

  • Use the cable management bracket to support cables and prevent cables from dislodging or developing stress points.

  • Place excess cable out of the way in the cable management bracket. Do not allow fastened loops of cable to dangle from the connector or cable management bracket, because this stresses the cable at the fastening point. Putting fasteners on the loops helps to maintain their shape.

  • Keep the cable connections clean and free of dust and other particles, which can cause drops in the received power level. Always inspect cables, and clean them if necessary before connecting an interface.

  • Label both ends of the cables to identify them.

The following guidelines apply specifically to fiber-optic cables:

  • When you unplug a fiber-optic cable, always place a rubber safety plug over the transceiver on the faceplate and on the end of the cable.

  • Anchor fiber-optic cables to avoid stress on the connectors. Be sure to secure fiber-optic cables so that they do not support their own weight as they hang to the floor. Never let fiber-optic cable hang free from the connector.

  • Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a few inches can damage the cable and cause problems that are difficult to diagnose.

  • Frequent plugging and unplugging of fiber-optic cable into and out of optical instruments can cause damage to the instruments that is expensive to repair. Instead, attach a short fiber extension to the optical equipment. Any wear and tear due to frequent plugging and unplugging is then absorbed by the short fiber extension, which is easy and inexpensive to replace.

  • Keep fiber-optic cable connections clean. Small microdeposits of oil and dust in the canal of the transceiver or cable connector could cause loss of light, reducing signal power and possibly causing intermittent problems with the optical connection.

    To clean the transceivers, use an appropriate fiber-cleaning device, such as RIFOCS Fiber Optic Adaptor Cleaning Wands (part number 946). Follow the directions for the cleaning kit you use.

After you clean an optical transceiver, make sure that the connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free fiber-optic cable cleaning kit, such as the Opptex Cletop-S Fiber Cleaner. Follow the directions for the cleaning kit you use.

Purpose

For optimum performance, verify the condition of the uplink ports.

Action

On a regular basis:

  • Check the port LEDs. The meaning of the LED states differs for various uplink ports. For more information, see ACX4000 LEDs Overview. If the router detects a port failure, the router generates an alarm message to be sent to the Routing Engine.

    A green status LED indicates that the port is functioning normally.

  • From the CLI, issue the show chassis fpc pic-status command.

    user@host> show chassis fpc pic-status

Replacing an ACX4000 MIC

  1. Removing an ACX4000 MIC

  2. Installing an ACX4000 MIC

Removing an ACX4000 MIC

MICs are hot-insertable and hot-removable. When you remove a MIC, the router continues to function, although the MIC interfaces being removed no longer function.

In the ACX4000 router, the MICs can be installed in two slots in the front of the router. A MIC weighs less than 2 lb (0.9 kg).

To remove a MIC (see Figure 1):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface to receive the MIC. If the MIC connects to fiber-optic cable, have ready a rubber safety cap for each transceiver and cable.
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Take the MIC offline by issuing the following CLI command:

     

    user@host> request chassis mic fpc-slot slot-number mic-slot slot-number offline
  4. Label the cables connected to the MIC so that you can later reconnect each cable to the correct MIC.
  5. Disconnect the cables from the MIC. If the MIC uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to a transceiver emit laser light that can damage your eyes.

    Caution

    Do not leave a fiber-optic transceiver uncovered except when you are inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

  6. Arrange the cable to prevent it from dislodging or developing stress points. Secure the cable so that it is not supporting its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop. Caution

    Avoid bending a fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

  7. Loosen the captive screw on each side of the MIC faceplate.
  8. Pull the ejector levers on each side of MIC you are removing away from the router. Pulling the ejector levers disconnects the MIC from the chassis.
  9. Grasp the handles on the MIC faceplate, and slide the MIC out of the chassis. Place the MIC in the electrostatic bag or on the antistatic mat.
  10. If you are not reinstalling a MIC into the emptied MIC slot within a short time, install a blank MIC panel over the slot to maintain proper airflow in the chassis card cage.
Figure 1: Removing a MIC
Removing a MIC

Installing an ACX4000 MIC

To install a MIC (see Figure 2):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. If the MIC uses fiber-optic cable, verify that a rubber safety cap is over each transceiver on the faceplate. Install a cap if necessary.
  3. Pull the ejector levers on each side of the MIC slot away from the router.
  4. Align the rear of the MIC with the guides located at the corners of the MIC slot.
  5. Slide the MIC into the MIC slot until it is firmly seated in the chassis.Caution

    Slide the MIC straight into the slot to avoid damaging the components on the MIC.

  6. Verify that the ejector levers on either side of the MIC are engaged by pushing them toward the router.
  7. Tighten the captive screws on either side of the MIC to secure the MIC in the slot.
  8. If the MIC uses fiber-optic cable, remove the rubber safety cap from each transceiver and the end of each cable.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to a transceiver emit laser light that can damage your eyes.

    Caution

    Do not leave a fiber-optic transceiver uncovered except when you are inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

  9. Insert the appropriate cables into the cable connectors on the MIC.
  10. Arrange each cable to prevent the cable from dislodging or developing stress points. Secure the cable so that it is not supporting its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop. Caution

    Do not let fiber-optic cables hang free from the connector. Do not allow the fastened loops of a cable to dangle, which stresses the cable at the fastening point.

    Caution

    Avoid bending a fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

  11. Bring the MIC online by issuing the following CLI command:
    user@host> request chassis mic fpc-slot slot-number mic-slot slot-number online

    The normal functioning status LED confirms that the MIC is online. You can also verify correct MIC functioning by issuing the show chassis fpc pic-status command described in Maintaining the ACX4000 Uplink Ports.

Figure 2: Installing a MIC
Installing a MIC

Replacing an ACX4000 Transceiver

Small form-factor pluggable transceivers (SFPs) are optical transceivers that are installed in the front panel of the ACX4000 router. Transceivers are hot-insertable and hot-removable.

  1. Removing an ACX4000 Transceiver

  2. Installing an ACX4000 Transceiver

Removing an ACX4000 Transceiver

Removing a transceiver does not interrupt router functioning, but the removed transceiver no longer receives or transmits data.

To remove a transceiver (see Figure 3):

  1. Have ready a replacement transceiver or a transceiver slot plug, an antistatic mat, and a rubber safety cap for the transceiver.
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Label the cables connected to the transceiver so that you can reconnect them correctly later. Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to a transceiver emit laser light that can damage your eyes.

  4. Remove the cable connector from the transceiver.
  5. Pull the ejector handle out from the transceiver to unlock the transceiver. Caution

    Make sure that you open the ejector handle completely until you hear it click. This action prevents damage to the transceiver.

    Use needlenose pliers to pull the ejector handle out from the transceiver.

  6. Grasp the transceiver ejector handle, and pull the transceiver approximately 0.5 in. (1.3 cm) out of the router.
  7. Using your fingers, grasp the body of the transceiver, and pull it the rest of the way out of the router.
    Figure 3: Removing Transceivers
    Removing Transceivers
  8. Place a rubber safety cap over the transceiver.
  9. Place the removed transceiver on an antistatic mat or in an electrostatic bag.
Caution

After removing a transceiver from the chassis, wait at least 30 seconds before reinserting it or inserting a transceiver into a different slot.

Installing an ACX4000 Transceiver

To install a transceiver:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Take each transceiver to be installed out of its electrostatic bag, and identify the slot on the component where it will be installed.
  3. Verify that each transceiver is covered by a rubber safety cap. If it is not, cover the transceiver with a safety cap.
  4. Carefully align the transceiver with the slots in the component. The connectors should face the component.
  5. Slide the transceiver until the connector is seated in the component slot. If you are unable to fully insert the transceiver, make sure the connector is facing the right way.
  6. Close the ejector handle of the transceiver.
  7. Remove the rubber safety cap from the transceiver and the end of the cable. Insert the cable into the transceiver.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to a transceiver emit laser light that can damage your eyes.

  8. Verify that the status LEDs on the front panel indicate that the transceiver is functioning correctly.

Replacing an ACX4000 Fiber-Optic Cable

To replace a fiber-optic cable:

  1. Disconnecting an ACX4000 Fiber-Optic Cable

  2. Connecting an ACX2000 Fiber-Optic Cable

Disconnecting an ACX4000 Fiber-Optic Cable

ACX Series routers have field-replaceable unit (FRU) optical transceivers to which you can connect fiber-optic cables.

Before you begin disconnecting a fiber-optic cable from an optical transceiver installed in an ACX Series router, ensure that you have taken the necessary precautions for safe handling of lasers (see Radiation from Open Port Apertures Warning and Laser and LED Safety Guidelines and Warnings).

Ensure that you have the following parts and tools available:

  • A rubber safety cap to cover the transceiver

  • A rubber safety cap to cover the fiber-optic cable connector

To disconnect a fiber-optic cable from an optical transceiver installed in the router:

  1. Disable the port in which the transceiver is installed by issuing the command:
    [edit interfaces]
    user@router# set interface-name disable
    Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.

  2. Carefully unplug the fiber-optic cable connector from the transceiver.
  3. Cover the transceiver with a rubber safety cap.Warning

    Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light.

  4. Cover the fiber-optic cable connector with the rubber safety cap.

Connecting an ACX2000 Fiber-Optic Cable

ACX Series routers have field-replaceable unit (FRU) optical transceivers to which you can connect fiber-optic cables.

Before you begin connecting a fiber-optic cable to an optical transceiver installed in a router, ensure that you have taken the necessary precautions for safe handling of lasers (see Radiation from Open Port Apertures Warning and Laser and LED Safety Guidelines and Warnings).

To connect a fiber-optic cable to an optical transceiver installed in an ACX Series router:

Warning

Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.

  1. If the fiber-optic cable connector is covered by a rubber safety cap, remove the cap. Save the cap.
  2. Remove the rubber safety cap from the optical transceiver. Save the cap.
  3. Insert the cable connector into the optical transceiver (see Figure 4).
    Figure 4: Connecting a Fiber-Optic Cable to an Optical Transceiver Installed in an ACX Series Router
    Connecting a Fiber-Optic Cable to an Optical Transceiver Installed
in an ACX Series Router
  4. Secure the cables so that they are not supporting their own weight. Place excess cable out of the way in a neatly coiled loop. Placing fasteners on a loop helps cables maintain their shape.Caution

    Do not bend fiber-optic cables beyond their minimum bend radius. An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose.

    Do not let fiber-optic cables hang free from the connector. Do not allow fastened loops of cables to dangle, which stresses the cables at the fastening point.

Replacing an ACX4000 Management Ethernet Cable

  1. Removing an ACX4000 Management Ethernet Cable

  2. Installing an ACX4000 Management Ethernet Cable

Removing an ACX4000 Management Ethernet Cable

To remove a serial cable connected to a management device:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Press the tab on the connector, and pull the connector straight out of the MGMT port. Figure 5 shows the connector.
  3. Disconnect the cable from the network device.
Figure 5: Ethernet Cable Connectors
Ethernet Cable
Connectors

Installing an ACX4000 Management Ethernet Cable

To install a serial cable connected to a management device:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Plug one end of the replacement cable into the appropriate MGMT port.
  3. Plug the other end of the cable into the network device.

Replacing an ACX4000 Console or Auxiliary Cable

  1. Removing an ACX4000 Console or Auxiliary Cable

  2. Installing an ACX4000 Console or Auxiliary Cable

Removing an ACX4000 Console or Auxiliary Cable

To remove a serial cable connected to a console or auxiliary device:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Press the tab on the connector, and pull the connector straight out of the CONSOLE/AUX port. Figure 6 shows the connector.
  3. Disconnect the cable from the console or auxiliary device.
Figure 6: Ethernet Cable Connectors
Ethernet
Cable Connectors

Installing an ACX4000 Console or Auxiliary Cable

The CONSOLE/AUX port on the front panel of the router accepts an RS-232 (EIA-232) serial cable with RJ-45 connectors.

To connect a cable between the router and the console or auxiliary device:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Connect one end of the replacement cable into the CONSOLE/AUX port.
  3. Plug the other end of the cable into the device's serial port.

Replacing an ACX4000 Air Filter

Removing an ACX4000 Air Filter

Caution

Do not run the router for more than a few minutes without the air filter in place.

Caution

Do not run the router for more than a few minutes without the air filter in place.

Caution

Always keep the air filter in place while the router is operating, except during replacement. Because the fans are very powerful, they could pull small bits of wire or other materials into the router through the unfiltered air intake. This could damage the router components.

The air filter is installed on the right side of the fan tray. To remove the air filter (see Figure 7):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Remove the fan tray as described in Removing an ACX4000 Fan Tray.
  3. Grasp the sides of the air filter, and slide it away from the fan tray faceplate.
Figure 7: Removing the ACX4000 Air Filter
Removing the ACX4000
Air Filter

Installing an ACX4000 Air Filter

The air filter installs on the right side of the fan tray. To install the air filter (see Figure 8):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Insert the air filter between the tabs on the side of the fan tray, and seat it in place.
Figure 8: Installing the Air Filter
Installing the Air
Filter

Replacing an ACX4000 Fan Tray

Removing an ACX4000 Fan Tray

Note

To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray.

To remove the fan tray (see Figure 9):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screws on the corners of the fan tray faceplate.
  3. Grasp the fan tray ejector lever, and pull it out to disconnect the fan tray from the chassis.Warning

    To avoid injury, keep tools and your fingers away from the fans as you slide the fan module out of the chassis. The fans might still be spinning.

  4. Place one hand under the fan tray to support it, and pull the fan tray completely out of the chassis.
Figure 9: Removing the Fan Tray
Removing the Fan Tray

Installing an ACX4000 Fan Tray

To install the fan tray (see Figure 10):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Orient the fan tray in the slot so that the arrow is pointing up, and slide the fan tray straight into the chassis.
  3. Verify that the ejector lever on the front of the fan tray is engaged by pushing it toward the router.
  4. Tighten the captive screws on the fan tray faceplate to secure it in the chassis.
Figure 10: Installing the Fan Tray
Installing the Fan
Tray

Replacing an ACX4000 AC Power Supply

Removing an ACX4000 AC Power Supply

Before you remove a power supply, be aware of the following:

Note

The minimum number of power supplies must be present in the router at all times.

Caution

To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal.

Note

After powering off a power supply, wait at least 60 seconds before turning it back on.

To remove an AC power supply (see Figure 12):

  1. Switch off the dedicated customer site circuit breaker for the power supply, and remove the power cord from the AC power source. Follow the instructions for your site.
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Remove the power cord from the power supply.
  4. Press the release latch on the right side of the power supply to disconnect the power supply from the chassis.
  5. Pull the power supply straight out of the chassis.
Figure 11: Removing an AC Power Cord
Removing an AC Power
Cord
Figure 12: Removing an AC Power Supply
Removing an AC Power
Supply

Installing an ACX4000 AC Power Supply

To install an AC power supply (see Figure 13):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The power supply faceplate should be flush with any adjacent power supply faceplate or blank installed in the power supply slot.
  3. Attach the power cord to the power supply.
  4. Attach the power cord to the AC power source, and switch on the dedicated customer site circuit breaker. Follow the instructions for your site.

    Observe the status LED on the power supply faceplate. If the power supply is correctly installed and functioning normally, the status LED lights green steadily.

Figure 13: Installing an AC Power Supply
Installing
an AC Power Supply

Replacing an ACX4000 DC Power Supply

Removing an ACX4000 DC Power Supply

Before you remove a power supply, be aware of the following:

Note

The minimum number of power supplies must be present in the router at all times.

Warning

Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

Caution

To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal.

Note

After powering off a power supply, wait at least 60 seconds before turning it back on.

To remove a DC power supply (see Figure 14):

  1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow your site's procedures for ESD.
  2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
  3. Verify that the status LED on the power supply is not lit.
  4. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  5. Move the DC circuit breaker on the DC power supply faceplate to the off (O) position.
  6. Remove the clear plastic cover protecting the terminal studs on the faceplate (see Figure 15).
  7. Remove the screw from each of the terminals. (Use a number 2 Phillips screwdriver.)
  8. Remove the cable lugs from the terminals.
  9. Carefully move the power cables out of the way.
  10. Press the latch located on the left side of the power supply, to release it from the chassis.
  11. Pull the power supply straight out of the chassis.
Figure 14: Removing a DC Power Supply
Removing a DC Power
Supply
Figure 15: Disconnecting the DC Power Cables
Disconnecting the DC Power Cables

Installing an ACX4000 DC Power Supply

Warning

Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

To install a DC power supply (see Figure 16):

  1. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The power supply faceplate should be flush with any adjacent power supply faceplate or blank installed in the power supply slot.
  4. Remove the clear plastic cover protecting the terminal on the faceplate.
  5. Remove the screws from the terminals.
  6. Verify that the DC power cables are correctly labeled before making connections to the power supply. In a typical power distribution scheme where the return is connected to chassis ground at the battery plant, you can use a multimeter to verify the resistance of the DC cables to chassis ground:

    For –48V and –60V:

    1. The cable with very large resistance (indicating an open circuit) to chassis ground is the DC input cable ().

    2. The cable with very low resistance (indicating a closed circuit) to chassis ground is the return cable (+).

    For +24V:

    1. The cable with very low resistance (indicating a closed circuit) to chassis ground is the DC input cable ().

    2. The cable with very large resistance (indicating an open circuit) to chassis ground is the return cable (+).

  7. Remove the screws and flat washers from the terminals.
  8. Secure each power cable lug to the terminal with the flat washers and screw (see Figure 17). Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque to each screw. Do not overtighten the screw. (Use a number 2 Phillips screwdriver.)
    1. Secure the positive DC source power cable lug to the return (+) terminal.

    2. Secure the negative DC source power cable lug to the input () terminal.

    Caution

    Ensure that each power cable lug seats flush against the surface of the terminal block as you are tightening the screws. Ensure that each screw is properly threaded into the terminal. Applying installation torque to the screw when improperly threaded may result in damage to the terminal.

    Caution

    The maximum torque rating of the terminal screws on the DC power supply is 9 lb-in. (1.02 Nm). The terminal screws may be damaged if excessive torque is applied. Use only a torque-controlled driver to tighten screws on the DC power supply terminals. Use an appropriately sized driver, with a maximum torque capacity of 9 lb-in. or less. Ensure that the driver is undamaged and properly calibrated and that you have been trained in its use. You may wish to use a driver that is designed to prevent overtorque when the preset torque level is achieved.

  9. Replace the clear plastic cover over the terminals on the faceplate.
  10. Connect each DC power cable to the appropriate external DC power source. Note

    For information about connecting to external DC power sources, see the instructions for your site.

  11. Switch on the external circuit breakers to provide voltage to the DC power source cable leads. Observe the system LED on the front of the router. If the DC power cable is correctly installed and functioning normally, the system LED lights green steadily. If the status LED indicates that the power supply is not functioning normally, repeat the installation and cabling procedures.
Figure 16: Installing a DC Power Supply
Installing a DC
Power Supply
Figure 17: Connecting the DC Power Cables
Connecting the DC Power Cables