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Connect the MX301 to the Network

Connecting network cables to the MX301 involves the following steps and safety precautions to prevent equipment damage and personal injury.

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

Note:

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

The Juniper Networks Technical Assistance Center (JTAC) provides complete support for Juniper-supplied optical modules and cables. However, JTAC does not provide support for third-party optical modules and cables that are not qualified or supplied by Juniper Networks. If you face a problem running a Juniper device that uses third-party optical modules or cables, JTAC may help you diagnose host-related issues if the observed issue is not, in the opinion of JTAC, related to the use of the third-party optical modules or cables. Your JTAC engineer will likely request that you check the third-party optical module or cable and, if required, replace it with an equivalent Juniper-qualified component.

Use of third-party optical modules with high-power consumption (for example, coherent ZR or ZR+) can potentially cause thermal damage to or reduce the lifespan of the host equipment. Any damage to the host equipment due to the use of third-party optical modules or cables is the users’ responsibility. Juniper Networks will accept no liability for any damage caused due to such use.
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.

Install a Transceiver

Before you install a transceiver in 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 a rubber safety cap available to cover the transceiver.

Figure 1 shows how to install a QSFP+ transceiver. The installation procedure is same for all types of transceivers except the QSFP28 transceivers.

CAUTION:

To prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the end of the transceiver.

To install a transceiver:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the device.
  2. Remove the transceiver from its bag.
  3. Check to see whether the transceiver is covered with a rubber safety cap. If it is not, cover the transceiver with a rubber safety cap.
    Laser 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 protects your eyes from accidental exposure to laser light.
  4. If the port in which you want to install the transceiver is covered with a dust cover, remove the dust cover. Save it in case you need to cover the port later. If you are hot-swapping a transceiver, wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver.
  5. 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 to the port. Misalignment might cause the pins to bend, making the transceiver unusable.
  6. Slide the transceiver in gently until it is fully seated. If you are installing a C form-factor pluggable (CFP) transceiver, use your fingers to tighten the captive screws on the transceiver.
    Figure 1: Install a Transceiver Install a Transceiver

Install a QSFP28 Transceiver

Before you 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.

CAUTION:

To prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the end of the transceiver.

To install a QSFP28 transceiver:

  1. Wrap and fasten one end of an ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the device.
  2. Verify that a rubber safety cap covers the QSFP28 transceiver.
  3. Position the transceiver in front of the port on the device so that the QSFP28 connector faces the port.
    Figure 2: Install a QSFP28 Transceiver Install a QSFP28 Transceiver
  4. Slide the transceiver into the port 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.

Connect a Fiber-Optic Cable

Before you connect a fiber-optic cable to an optical transceiver installed in a device, ensure that you have taken the necessary precautions for the safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).

Laser 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.

To connect a fiber-optic cable to an optical transceiver installed in a device:

  1. If the fiber-optic cable connector is covered with a rubber safety cap, remove the cap. Save the cap for subsequent use.
  2. Remove the rubber safety cap from the optical transceiver. Save the cap for subsequent use.
    CAUTION:

    Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The safety cap keeps the port clean and protects your eyes from accidental exposure to laser light.
    Laser Warning:

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. The fiber-optic transceivers and the fiber-optic cables connected to a transceiver emit laser light that can damage your eyes.
  3. Insert the cable connector into the optical transceiver.
    Figure 3: Connect a Fiber-Optic Cable to an Optical Transceiver Installed in a Device Connect a Fiber-Optic Cable to an Optical Transceiver Installed in a Device
  4. Secure the cables so that they do not support 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.

    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.

    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.