Technical Documentation

Replacing a T640 SIB

Five SIBs are installed in the T640 router. The SIBs are located in the rear of the chassis in the slots marked SIB0 through SIB4. Each SIB weighs approximately 6.8 lb (3.1 kg).

SIBs are hot-insertable and hot-removable.

Note: SIB version B is supported in Junos OS Release 7.3 and later. You can use a SIB or SIB version B in a chassis running Junos 7.3 or later, but you cannot use both on the same chassis at the same time.

If you use one or more FPC4s or Enhanced Scaling FPCs in a T640 router that is not part of a routing matrix, each SIB in the router must be a SIB version B.

Note: The T640-SIB requires Junos OS Release 7.0 or later.

To replace a SIB, perform the following procedures:

Removing a T640 Standard SIB or Standard SIB Version B

Note: If you are upgrading to standard SIB version B or T640-SIBs, see Upgrading to a T640 Standard SIB Version B or the TX Matrix Platform Hardware Guide for T640-SIBs before removing the SIBs.

To remove a standard SIB or standard SIB version B (see Figure 1):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
  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. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
  3. Press the online/offline button on the SIB faceplate. Press and hold down the button until the green OK LED goes out (about 5 seconds).
  4. Loosen the captive screws (using a Phillips (+) screwdriver, number 2) on the ejector handles on each side of the SIB faceplate.
  5. Flip the ejector handles outward to unseat the SIB.
  6. Grasp both ejector handles, pull firmly, and slide the SIB about three-quarters of the way out of the chassis.
  7. Place one hand underneath the 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.

Figure 1: Removing a SIB

Image g001564.gif

Installing a T640 Standard SIB or Standard SIB Version B

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

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
  2. Place one hand underneath the SIB to support it. With the other hand, hold one of the ejector handles on the SIB faceplate.
  3. Carefully align the sides of the SIB with the guides inside the chassis.
  4. Slide the SIB into the chassis, carefully ensuring that it is correctly aligned.
  5. Grasp both ejector handles and press them inward to seat the SIB.
  6. Tighten the captive screws on the ejector handles.
  7. Press the offline/online button until the green OK LED blinks to bring the SIB online.
  8. Check the LEDs on the SIB faceplate to verify that it is functioning normally:
    • The green OK LED should light steadily a few minutes after the SIB is installed.
    • If the FAIL LED is lit steadily, remove and install the SIB again (see Removing a T640-SIB and Installing a T640-SIB). If the FAIL LED still lights steadily, the SIB is not functioning properly. Contact your customer support representative.
  9. Check the status of the SIB. Issue the following CLI command:

    user@host> show chassis environment sib

Figure 2: Installing a SIB

Image g001565.gif

Upgrading to a T640 Standard SIB Version B

Note: Before you install one or more FPC4s in a T640 router that is not part of a routing matrix, you must replace each SIB in the router with a SIB version B.

SIB version B is supported in Junos OS Release 7.3 and later.

Standard SIBs and SIB version B cannot be installed in the same chassis at the same time, except during upgrade. To upgrade to standard SIB version B, you prepare the router by placing it into upgrade mode, then replace each standard SIB with a standard SIB version B.

Note: During the upgrade, the T640 router might experience some packet loss, depending on the operational environment. For more information, contact your customer support representative.

To upgrade for each of the SIBs in the T640 router, perform the following procedures:

Preparing to Upgrade to a T640 Standard SIB Version B

To prepare to upgrade from standard SIBs to standard SIB version B:

  1. Verify that you are running Junos OS Release 7.3 or later.
  2. Include the fabric upgrade-mode statement in the configuration at the [edit chassis] hierarchy level.

    user@host# set chassis fabric upgrade-mode

  3. Commit the configuration on both the master and the backup Routing Engines.

    user@host# commit synchronize

  4. Display the status of the T640 router SIBs by issuing the show chassis sibs command:

    user@host> show chassis sibs
    Slot  State               Uptime
 0    Spare            255 days, 31 minutes, 12 seconds
 1    Online           255 days, 31 minutes, 12 seconds
 2    Online           255 days, 31 minutes, 12 seconds
 3    Online           255 days, 31 minutes, 12 seconds
 4    Online           255 days, 31 minutes, 12 seconds

    Verify that four SIBs are in the Online state. If five SIBs are installed, verify that one SIB is in the Spare state. To bring a SIB online, issue the request chassis sib online operational mode command.

Replacing T640 Standard SIBs with Standard SIB Version B

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
  2. Select one of the SIBs to replace, and take it offline by using one of the following methods:
    • Press and hold the ONLINE/OFFLINE button on the SIB faceplate for about five seconds until the OK LED is not lit.
    • Issue the request chassis sib offline command. For example:

      user@host> request chassis sib offline slot 0

    Note: When you bring an active SIB offline, the spare SIB becomes active and transitions to the Online state.

  3. Replace the SIB with a standard SIB version B. Use the replacement procedures described in Removing a T640 Standard SIB or Standard SIB Version B and Installing a T640 Standard SIB or Standard SIB Version B

    Note: Ensure that the ejector handle tabs are properly mated inside their corresponding chassis slots before you tighten the captive screws on the ejector handles. You might have to close and open the handles a few times before the tabs catch the slots.

Removing a T640-SIB

To remove a T640-SIB (see Removing a T640 Standard SIB or Standard SIB Version B):

  1. Have ready a replacement SIB or blank panel, an antistatic mat, and one dust cover for the fiber-optic array cable connector you remove from the T640-SIB.
  2. 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. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
  3. Ensure that the fiber-optic array cable connectors plugged into the T640-SIB are labeled so you can reconnect them correctly.
  4. Use one of the following methods to take the T640-SIB offline:
    • Issue the following CLI command:

      user@host> request chassis sib lcc number offline slot slot-number

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

    • Press and hold the online/offline button on the craft interface that corresponds to the T640-SIB. Hold the button down until all of the LEDs surrounding the button are not lit.

  5. Remove the fiber-optic array cable connector from the fiber-optic array on the faceplate of theT640-SIB.

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

  6. Install a dust cover on the cable connector you removed from the T640-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 T640-SIB so they do not interfere with the removal of the T640-SIB.
  8. Simultaneously turn both ejector handles on the top and bottom of the faceplate counterclockwise to unseat the T640-SIB.
  9. Grasp both ejector handles, pull firmly, and slide the T640-SIB about three-quarters of the way out of the chassis.
  10. Place one hand underneath the T640-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 SIB into the emptied SIB slot within a short time, install a blank SIB panel over the slot to maintain proper airflow in the SIB card cage.

Figure 3: Removing a SIB

Image g001564.gif

Installing a T640-SIB

Use this procedure to install a T640-SIB in a T640 router that is connected to a TX Matrix platform. To convert the switching plane from standard SIBs to T640-SIBs, see the procedures in the TX Matrix Platform Hardware Guide.

Note: While you install the T640-SIB or replace a fiber-optic array cable, small deposits of oil and dust can enter the T640-SIB fiber-optic array adapters, the fiber-optic array cable connectors, and the loopback connectors and adapters. We recommend 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 the TX Matrix Platform Hardware Guide.

To install a T640-SIB into the rear of the chassis (see Installing a T640 Standard SIB or Standard SIB Version B):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
  2. Place one hand under the bottom edge of the T640-SIB and one hand around the top of the T640-SIB faceplate.
  3. If applicable, remove the protective tape covering each T640-SIB fiber-optic array adapter.
  4. Remove the dust covers from the fiber-optic array cable connectors. To remove a dust cover, loosen the thumbscrew and captive screw on the connector. (Use the supplied small slotted screwdriver to loosen the captive screw.) Store the dust covers in a dust-free resealable plastic bag.
  5. Install the cable connector to the fiber-optic array adapter. Align the connector with the fiber-optic array adapter, and carefully press it into the adapter until it stops. The cable connector and adapter are keyed to ensure proper mating.

    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.

  6. 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.
  7. Use one of the following methods to bring the T640-SIB online:
    • Press and hold the online/offline button on the faceplate until the green OK LED next to the button blinks.
    • Issue the following CLI command:

      user@host> request chassis sib lcc number slot slot-number online
  8. Check the LEDs on the T640-SIB faceplate to verify that the SIB is functioning normally.
    • The green OK LED should light steadily a few minutes after the T640-SIB is installed.
    • If the FAIL LED is lit steadily, remove and install the T640-SIB again (see Removing a T640-SIB and this procedure). If the FAIL LED still lights steadily, the T640-SIB is not functioning properly. Contact your customer support representative.
  9. Check the status of the T640-SIBs. Issue the following CLI commands:

    user@host> show chassis environment sib lcc number

    For more information and sample output from these commands, see theJunos System Basics and Services Command Reference.

Related Topics

Published: 2010-08-11

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