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Removing and Installing MX10008 Switch Fabric Boards

 

Handling and Storing MX10008 Line Cards, RCBs, and SFBs

The MX10008 chassis has several field-replaceable units (FRUs) that have fragile components. To avoid damaging the line cards, routing and control boards (RCBs), and Switch Fabric Boards (SFBs), you must follow safe handling practices.

Holding Line Cards and Routing and Control Boards

Pay proper attention to the way you are holding line cards and Routing and Control Boards (RCBs). Line cards and RCBs are installed horizontally and it is best to hold them by the sides of the units when they are not in the chassis.

To handle and store a line card or an RCB properly:

  1. Orient the line card or the RCB so that the faceplate is toward you.
  2. Grasp each side of the unit firmly as you slide the unit out of the chassis.
  3. Take care not to strike the unit against any object as you carry it.Caution

    Never hold the line card or RCB by the connector edge. The connectors are fragile and the line card or RCB will not seat properly if the connector is damaged. See Figure 1.

    Figure 1: Connector Edge of a Line Card
    Connector Edge of a
Line Card
      1
    Connectors
     
  4. If you must rest a line card or RCB on an edge, place a cushion between the edge and the surface.Caution

    Do not stack line cards or RCBs on top of one another or on top of any other component.

  5. Place each line card or RCB in an individual electrostatic bag or separately on an antistatic mat that is placed on a flat, stable surface.

Holding Switch Fabric Boards

While removing an SFB from the router chassis, you should hold the SFB vertically until it is clear of the router chassis. Then you should rotate the SFB 90 degrees and place it on an antistatic mat or in an electrostatic bag for storage (see Figure 2).

Figure 2: SFB
SFB

The proper method of holding an SFB is to:

  1. Hold the SFB by the ejectors while you keep the SFB vertical, and slide the SFB about three-quarters of the way out of the chassis.
  2. Place one hand underneath the SFB to support it, and slide it completely out of the chassis.Caution

    Never hold an SFB by the connector edge. The connectors are fragile. You cannot align and seat an SFB properly if the connectors are damaged.

    Caution

    Do not stack SFBs on top of one another or on top of any other component.

Storing Line Cards, RCBs, and SFBs

You must store line cards, RCBs, and SFBs either in the chassis or in a spare shipping container, horizontally and sheet-metal side down. Do not stack these units on top of one another or on top of any other component. Place each unit separately in an antistatic bag or on an antistatic mat placed on a flat, stable surface.

Note

Because these units are heavy, and because electrotatic bags are fragile, inserting the line card into the bag is best done by two people.

To insert a line card, an RCB, or an SFB into an electrostatic bag:

  1. Hold the unit horizontally with the faceplate toward you.
  2. Have the second person slide the opening of the electrostatic bag over the connector edge and then pull the bag to cover the unit.

If you must insert a line card, an RCB, or an SFB into a bag by yourself:

  1. Lay the unit horizontally on an antistatic mat that is on a flat, stable surface with the sheet metal side down.
  2. Orient the unit with the faceplate toward you.
  3. Carefully insert the connector edge into the opening of the bag and pull the bag toward you to cover the unit.

Removing an MX10008 Switch Fabric Board

An MX10008 router has six Switch Fabric Boards (SFBs) that are located in the middle of the chassis behind the fan trays. SIB 0 through SIB 2 are located behind the left fan tray and SIB 3 through SIB 5 are located behind the right fan tray. You must remove the appropriate fan tray to access the failing SFB. See Removing an MX10008 Fan Tray.

Ensure you have the following equipment on hand before replacing an SFB:

  • Electrostatic bag or antistatic mat

  • Electrostatic discharge (ESD) grounding strap

To remove an SFB (see Figure 5):

  1. Set the fans to full speed by using the test chassis fan tray speed 0 full and test chassis fan tray speed 1 full commands and wait for ten minutes.
  2. Take the SFB offline using the request chassis sib slot slot number offline command.Note

    If you suspect the SFB is faulty and want to ensure packets do not flow through the SFB, power down the SFB instead of taking the SFB offline. To power down the SFB, use the set chassis sib power-off slot slot number command. To bring up a new SFB up in the slot, you must delete the old configuration using the delete chassis sib power-off slot slot number command.

  3. Place an electrostatic bag or an antistatic mat on a flat, stable surface.
  4. Remove the appropriate fan tray (see Removing an MX10008 Fan Tray).
  5. Wrap and fasten one end of an ESD strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis. There is an ESD point located next to the protective earthing terminal and below PSU 5 on the MX10008 rear panel (see Figure 3).
    Figure 3: ESD Point on MX10008 Chassis Rear
    ESD Point on MX10008 Chassis
Rear
      1
    ESD point
     
  6. Loosen the captive screws at the top and bottom of the card.
  7. Grasp both handles and spread them apart, and then slide the SFB about a quarter of the way out of the slot. See Figure 4.
    Figure 4: Loosening Captive Screws and Spread Ejector Handles
    Loosening Captive
Screws and Spread Ejector Handles
  8. Grasp the ejector handle with one hand and place your other hand under the SFB for support as you slide the SFB out of the slot (see Figure 5).Caution

    The SFB surface and handles may be hot. Allow a few minutes for the surface and handles to cool by pulling out the SFB halfway out of the chassis. Wear proper protective, heat-resistant gloves while removing an SFB.

    Figure 5: Removing the SFB from an MX10008 Chassis
    Removing the SFB from
an MX10008 Chassis
  9. Support the SFB as you rotate the SFB 90 degrees and place it on the antistatic mat with the printed circuit board facing upward. Be careful not to bump or handle the SFB by the connectors. If you do not have an antistatic mat, have another person help you slide the electrostatic bag over the SFB before placing it on the stable surface. See Figure 6.Caution

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

    Figure 6: Extracted SFB
    Extracted SFB
      1
    Connectors
      2
    Printed circuit board

Installing an MX10008 Switch Fabric Board

An MX10008 router has six Switch Fabric Boards (SFBs) that are located in the middle of the chassis behind the fan trays. SFB 0 through SFB 2 are located behind the left fan tray, and SFB 3 through SFB 5 are located behind the right fan tray. You must remove the appropriate fan tray to install an SFB. See Removing an MX10008 Fan Tray. Fan trays must be replaced within the duration mentioned in Table 1.

Table 1: Replacement Duration for the Fan Tray

Chassis Ambient Temperature

Duration

27°C

5 minutes

35°C

3 minutes

40°C

2 minutes

Note

When replacing the fans or SIBs at 40°C chassis ambient temperature, ensure that the fans run at 100% fan speed for at least 10 minutes before replacing the fans or SIBs.

Use the test chassis fan tray 0 speed full-speed and test chassis fan tray 1 speed full-speed commands to set the chassis fans to 100% speed.

Ensure you have the following equipment on hand before installing an SFB:

  • Electrostatic bag or antistatic mat

  • Electrostatic discharge (ESD) grounding strap

  • Replacement SFB

To install an SFB:

  1. Place an electrostatic bag or an antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of an ESD strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis. There is an ESD point located next to the protective earthing terminal and below PSU 5 on the MX10008 rear panel (see Figure 7).
    Figure 7: ESD Point on MX10008 Chassis Rear
    ESD Point on MX10008
Chassis Rear
      1
    ESD point
     
  3. Either remove the failing SFB and store it in an electrostatic bag or on an antistatic mat (see Removing an MX10008 Switch Fabric Board) or remove the cover panel by grasping each side of the plate and pulling the panel straight out (see Figure 8 for an example using the MX10008).
    Figure 8: Removing an SFB Cover Plate on an MX10008
    Removing an SFB Cover Plate
on an MX10008
  4. Lift the SFB by the handle with one hand and support the lower edge with the other hand.
  5. Holding the SFB vertically, slide the SFB into the open slot until the ejector handles engage and start to close.
  6. Grasp the two ejector handles and fold them inward until they latch to so that the SFB is fully seated (see Figure 9 for the MX10008.
    Figure 9: Installing an MX10008 SFB
    Installing an MX10008
SFB
  7. Tighten the captive screws by using your thumb and forefinger.
  8. Install the appropriate fan tray (see Installing an MX10008 Fan Tray).
  9. Set the fans to normal speed by using the test chassis fan tray speed 0 normal and test chassis fan tray speed 1 normal command.
  10. Bring the SFB online by using the request chassis sib slot slot number online command. You can check the status of the SFB by using the show chassis sfb and the show chassis fabric plane-location commands.
    Note

    If you completely powered off the SFB using the set chassis sib power-off slot slot command, you must delete the existing configuration in order to bring the SFB online. To delete the existing configuration and bring a replacement SFB online, use the delete chassis sib power-off slot slot number command.