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Maintaining MX204 Components

 

Routine Maintenance Procedures for MX204 Routers

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 alarms and LEDs.

Maintaining the MX204 Routing Engine

Purpose

For optimum router performance, verify the condition of the Routing Engine on a regular basis.

Action

On a regular basis:

  • Check the LEDs on the front panel to view information about the status of the Routing Engine.

  • To check the status of the Routing Engine on the router, issue the show chassis routing-engine command. The output is similar to the following:

    user@host> show chassis routing-engine

Replace an SFP, SFP+, or QSFP+ Transceiver

The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.

Remove a Transceiver

Before you begin removing a transceiver from a device, ensure that you have taken the necessary precautions for the safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).

Ensure that you have the following parts and tools available:

  • An antistatic bag or an antistatic mat

  • Rubber safety caps to cover the transceiver and fiber-optic cable connector

  • A dust cover to cover the port or a replacement transceiver

Note

After you remove a transceiver or when you change the media-type configuration, wait for 6  seconds for the interface to display the operational commands.

To remove a transceiver:

  1. Place the antistatic bag or antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to an ESD point.
  3. Label the cables connected to the transceiver so that you can reconnect them correctly later.
  4. Remove the cable connected to the transceiver (see Disconnect a Fiber-Optic Cable). Cover the transceiver and the end of each fiber-optic cable connector with a rubber safety cap immediately after disconnecting the fiber-optic cables.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.

    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.

  5. If there is a cable management system, arrange the cable in the cable management system to prevent it from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.Caution

    Do not bend the 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.

  6. By using your fingers, pull open the ejector lever on the transceiver to unlock the transceiver.Caution

    Ensure that you open the ejector handle completely until you hear it click. Doing this prevents damage to the transceiver.

    Figure 1 shows how to remove an SFP transceiver. The procedure is the same for SFP+ and QSFP+ transceivers.

    Figure 1: Small Form-Factor Pluggable (SFP) Transceiver
    Small Form-Factor Pluggable (SFP)
Transceiver
  7. Grasp the transceiver ejector handle, and pull the transceiver approximately 0.5 in. (1.3  cm) out of the interface port.
  8. Using your fingers, grasp the body of the transceiver, and pull it the rest of the way out of the interface port.
  9. Place a rubber safety cap over the transceiver.
  10. Place the removed transceiver on an antistatic mat or in an electrostatic bag.
  11. Place the dust cover over the empty port or install the replacement transceiver.
Caution

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

Install a Transceiver

Before you begin to install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).

Ensure that you have a rubber safety cap available to cover the transceiver.

Note

After you insert a transceiver or after you change the media-type configuration, wait for 6  seconds for the interface to display operational commands.

Note

We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.

Caution

If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.

To install a transceiver:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to an ESD point.
  2. Remove the transceiver from its bag.
  3. Verify that each transceiver is covered by a rubber safety cap. If it is not, cover the transceiver with a 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. Using both hands, carefully place the transceiver in the empty port. The connectors must face the chassis.Caution

    Before you slide the transceiver into the port, ensure that the transceiver is aligned correctly. Misalignment might cause the pins to bend, making the transceiver unusable.

  5. Slide in the transceiver until it is fully seated. If you are unable to fully insert the transceiver, ensure that the connector is facing the right way.
    Figure 2: Install a Transceiver
    Install a Transceiver
      1
    Ejector lever
     
  6. Close the ejector handle of the transceiver.
  7. Remove the rubber safety cap from the transceiver and from 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.

Replace a QSFP28 Transceiver

28-Gbps quad small form-factor pluggable (QSFP28) transceivers are hot-insertable and hot-removable. Removing a QSFP28 transceiver does not interrupt router functioning, but the removed QSFP28 transceiver no longer receives or transmits data.

Remove a QSFP28 Transceiver

The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.

Note

After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.

Note

We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.

Before you begin to remove a transceiver from a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).

Ensure that you have the following parts and tools available:

  • An antistatic bag or an antistatic mat

  • Rubber safety caps to cover the transceiver and fiber-optic cable connector

  • A dust cover to cover the port or a replacement transceiver

To remove a QSFP28 transceiver (see Figure 3):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface to receive the QSFP28 transceiver. Have ready a rubber safety cap for the QSFP28 transceiver and the cable.
  2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to an ESD point.
  3. Label the cable connected to the QSFP28 transceiver so that you can later reconnect the cable to the correct QSFP28 transceiver.
  4. Disconnect the cable from the transceiver. Immediately cover the transceiver and the end of the 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 cable connected to a transceiver emit laser light that can damage your eyes.

    Caution

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

  5. If there is a cable management system, arrange the cable in the cable management system to prevent it from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.Caution

    Avoid bending the 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.

  6. Pull the transceiver’s rubber handle straight back.

    The locking pins on the transceiver automatically releases the transceiver.

    Figure 3: 28-Gbps Quad Small Form-Factor Pluggable (QSFP28) Transceiver
    28-Gbps Quad Small Form-Factor
Pluggable (QSFP28) Transceiver
  7. Place the transceiver on the antistatic mat or in the electrostatic bag.
  8. Place the dust cover over the empty port or install the replacement transceiver.

Install a QSFP28 Transceiver

The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting the device functions.

Note

After you insert a transceiver or after you change the media-type configuration, wait for 6  seconds for the interface to display operational commands.

Note

We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.

Caution

If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.

Before you begin to install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).

Ensure that you have a rubber safety cap available to cover the transceiver.

To install a replacement QSFP28 transceiver (see Figure 4):

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to an ESD point.
  2. Verify that a rubber safety cap covers the QSFP28 transceiver. If it is not, cover the transceiver with a safety cap.
  3. Orient the transceiver in front of the port so that the QSFP28 connector faces the appropriate direction.
    Figure 4: Install a QSFP28 Transceiver
    Install a QSFP28 Transceiver
  4. Slide the transceiver into the slot until the locking pins lock in place. If there is resistance, remove the transceiver and flip it so that the connector faces the other direction.
  5. Remove the rubber safety cap from the transceiver and from the end of the cable, and 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 cable connected to a transceiver emit laser light that can damage your eyes.

    Caution

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

  6. If there is a cable management system, arrange the cable in the cable management system to prevent the cable from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.Caution

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

    Caution

    Avoid bending the 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. Verify that the status LEDs on the router indicate that the QSFP28 transceiver is functioning correctly. You can also verify that the interface port is functioning by running the show chassis fpc pic-status command.