Replacing a TX Matrix TX-SIB

The TX-SIBs are located in the front of the chassis in slots SIB0 through SIB4. Each TX-SIB weighs approximately 35 lb (15.9 kg). TX-SIBs are hot-insertable and hot-removable.

1. Removing a TX Matrix TX-SIB
2. Installing a TX Matrix TX-SIB

Removing a TX Matrix TX-SIB

Five TX-SIBs are installed in the TX Matrix router. When you remove a TX-SIB, traffic forwarding continues without any degradation as long as four TX-SIBs remain in the chassis.

1. Have ready a replacement TX-SIB or TX-SIB blank panel, an antistatic mat for the TX-SIB, and one dust cover for each fiber-optic array cable connector you remove from the TX-SIB.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
3. Ensure that the fiber-optic array cable connectors plugged into the TX-SIB are labeled so you can reconnect them correctly.
4. Use one of the following methods to take the TX-SIB offline:
   • Issue the following CLI command:
     user@host> request chassis sib slot slot-number offline scc

     For more information about the command, see the Junos OS System Basics and Services Command Reference .

   • Press and hold the online/offline button on the craft interface that corresponds to the TX-SIB. Hold the button down until all of the LEDs surrounding the button are not lit.
5. Remove each fiber-optic array cable connector (up to four) from the TX-SIB. Partially loosen the thumbscrew and captive screw on the fiber-optic array cable connector. (Use the supplied small slotted screwdriver to loosen the captive screw.) Alternate between the thumbscrew and captive screw until the cable connector is removed from the adapter.

   Warning: Do not look directly into a fiber-optic array adapter or a connector at the end of a fiber-optic array cable attached to an adapter. The fiber optics emit laser light that can damage your eyes.

6. Install a dust cover on each cable connector you removed from the TX-SIB. Align the dust cover with the cable connector and carefully press them together until they stop. The cover and the cable connector are keyed to ensure proper mating. Secure the dust cover by tightening the thumbscrew and captive screw on the connector. (Use the supplied small slotted screwdriver to tighten the captive screw.)
7. Move the fiber-optic array cables to the side of the TX-SIB so they do not interfere with the removal of the TX-SIB. You might need to remove the cables from the comb panel assembly.
8. Simultaneously turn both ejector handles on the top and bottom of the faceplate counterclockwise to unseat the TX-SIB.
9. Grasp both ejector handles, pull firmly, and slide the TX-SIB about three-quarters of the way out of the chassis.

   Caution: Be prepared to support the weight of the TX-SIB (approximately 35 lb [15.9 kg]) before you slide it completely out of the chassis. When the TX-SIB is out of the chassis, do not hold it by its ejector handles or edge connectors. They cannot support its weight.

10. Place one hand underneath the TX-SIB to support it, and slide it completely out of the chassis. Place it on the antistatic mat.

    Caution: Do not stack hardware components on one another after you remove them. Place each component on an antistatic mat resting on a stable, flat surface.

11. If you are not reinstalling a TX-SIB into the emptied TX-SIB slot within a short time, install a blank TX-SIB panel over the slot to maintain proper airflow in the TX-SIB card cage.

Figure 1: Removing a TX-SIB

Installing a TX Matrix TX-SIB

Caution: While you install the TX Matrix router or replace a fiber-optic array cable, small deposits of oil, dust, and debris can enter the TX-SIB and T640-SIB fiber-optic array adapters, the fiber-optic array cable connectors, and the loopback connectors and adapters. We recommend that you clean the optics in these components, as well as the loopback connector and adapter dust covers, immediately before connecting them. For cleaning instructions, see Cleaning the TX Matrix and T640 Fiber-Optic Components Overview.

To install a TX-SIB into the rear of the chassis (see Figure 2):

Caution: Be prepared to support the weight of the TX-SIB (approximately 35 lb [15.9 kg])  before you lift it.

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Place one hand under the bottom edge of the TX-SIB and one hand around the top of the TX-SIB faceplate.

   Caution: When the TX-SIB is out of the chassis, do not hold it by its ejector handles or edge connectors. They cannot support its weight.

3. Locate the slot in the TX-SIB card cage in which you plan to install the TX-SIB.
4. Lift the TX-SIB into place and carefully align first the bottom, then the top of the TX-SIB with the guides inside the card cage.
5. Carefully slide the TX-SIB all the way into the card cage until you feel resistance.
6. Starting with the ejector handles on the top and bottom of the TX-SIB faceplate nearly horizontal, simultaneously turn both ejector handles clockwise to seat the TX-SIB.
7. If applicable, remove the protective tape covering each TX-SIB fiber-optic array adapter you are connecting to a T640-SIB.
8. Remove the dust covers from the fiber-optic array cable connectors. Loosen the thumbscrew and captive screw on each connector. (Use the supplied small slotted screwdriver to loosen the captive screw.) Store the dust covers in a dust-free resealable plastic bag.
9. If you removed the fiber-optic array cables from the comb panel assembly, reinstall them in the assembly as described in Routing the TX Matrix Fiber-Optic Array Cables.
10. Install each cable connector (up to four) in its corresponding TX-SIB adapter. Align the connector with its corresponding TX-SIB adapter and carefully press it into the adapter until it stops. The cable connector and adapter are keyed to ensure proper mating. Partially tighten the thumbscrew and captive screw on the fiber-optic array cable connector. (Use the supplied small slotted screwdriver to tighten the captive screw.) Alternate between the thumbscrew and captive screw until the cable connector is secured to the adapter.

    Note: The optics in a fiber-optic array adapter are spring loaded, so you must continue to apply force to a fiber-optic array cable connector or loopback connector while securing it to a TX-SIB or T640-SIB adapter.

    Warning: Do not look directly into a fiber-optic array adapter or a connector at the end of a fiber-optic array cable attached to an adapter. The fiber optics emit laser light that can damage your eyes.

11. Use one of the following methods to bring the TX-SIB online:
    • Press and hold the online/offline button on the craft interface that corresponds to the TX-SIB until the green OK LED next to the button blinks.
    • Issue the following CLI command:
      user@host> request chassis sib slot slot-number online scc
12. To verify that the TX-SIB is functioning normally, check the LEDs on the craft interface. The green OK LED should light steadily a few minutes after the TX-SIB is installed. If the FAIL LED is lit steadily, remove the TX-SIB (see Removing a TX Matrix TX-SIB), and reinstall the TX-SIB. If the FAIL LED still lights steadily, the TX-SIB is not functioning properly. Contact your customer support representative.

    To check the status of the TX-SIBs, issue the following CLI commands:

    user@host> show chassis environment sib scc
    user@host> show chassis sibs
    user@host> show chassis fabric sibs scc

    For more information and sample output from these commands, see Verifying the State of the Routing Matrix.

Figure 2: Installing a TX-SIB