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Maintaining the EX8208 Host Subsystem

 

Taking the SRE Module Offline in an EX8208 Switch

Before removing a Switch Fabric and Routing Engine (SRE) module from an EX8208 switch, take the module offline.

The SRE module performs switching and system management functions in an EX8208 switch. Your switch can have either one or two SRE modules.

Taking an SRE Module Offline in a Switch with Redundant SRE Modules

To take an SRE module offline in a switch with two SRE modules:

  1. Determine whether the SRE module is the master or backup using one of these methods:
    • Look at the MS (master) LED on the SRE module faceplate. If the MS LED is lit steady green, the SRE module is the master. If it is blinking green, the SRE module is the backup.

    • Issue the following CLI command:



      user@switch> show chassis routing-engine

      Routing Engine status:

      Slot 0: Current state Master

      Election priority Master (default) ...
  2. If the SRE module that you want to remove is the master, make it the backup module:

    user@switch> request chassis routing-engine master switch
  3. From the master, halt the other Routing Engine:
    user@switch> request system halt other-routing-engine
  4. Wait a minute or two for the Routing Engine to halt before proceeding. If you are using a console connection, you will see a message when the system is halted. If the Routing Engine has not yet halted, the following step returns an error.
  5. Take the SRE module offline:

    user@switch> request chassis cb offline slot slot-number


    where slot-number is either 0 (slot SRE0) or 1 (slot SRE1).

  6. (Optional) Confirm that the SRE module is offline:

    user@switch> show chassis environment cb

If the state field in the command output shows that the module is offline, then it is safe to remove the SRE module.

Taking an SRE Module Offline in a Switch With One SRE Module

To take the SRE module offline:

  1. Connect to the console port on the SRE module.
  2. From the console, halt the SRE module:

    user@switch> request system halt


    The RE module is gracefully halted but not powered off.

When a message appears confirming that the operating system has halted, it is safe to remove the SRE module. The Routing Engine might take up to 5 minutes to gracefully halt.

Removing an SRE Module from an EX8208 Switch

You must remove the Switch Fabric and Routing Engine (SRE) module from the EX8208 switch chassis if you need to replace the module or if you need to remove switch components before moving the chassis without using a mechanical lift.

Caution

Do not lift the SRE module by holding the ejector levers. The levers cannot support the weight of the module. Lifting the module by the levers might bend the levers. Bent levers will prevent the SRE module from being properly seated in the chassis.

Before you begin to remove an SRE module:

Ensure that you have the following parts and tools available to remove an SRE module:

  • Electrostatic discharge (ESD) grounding strap

  • Phillips (+) screwdriver, number 2

  • Antistatic bag or antistatic mat

  • Replacement SRE module or cover panel for the SRE module slot

To remove an SRE module from an EX8208 switch (see Figure 1):

  1. Take the SRE module offline. See Taking the SRE Module Offline in an EX8208 Switch.
  2. Attach the antistatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Place the antistatic bag or antistatic mat on a flat, stable surface.
  4. Loosen the screws on each side of the SRE module by turning them counterclockwise using the screwdriver until they are completely unseated.
  5. Pull both the ejector levers outwards, away from the faceplate of the SRE module, until they go no further. This action causes the SRE module to slide out of the chassis slightly.
  6. Grasp the ejector levers and pull the SRE module out to about halfway.
  7. Taking care not to touch the leads, pins, or solder connections, place one hand underneath the SRE module to support it and slide it completely out of the chassis.
  8. Place the SRE module in the antistatic bag or on the antistatic mat.
  9. If you are not replacing the SRE module, place the cover panel over the empty slot, insert the screws through the holes on each side of the cover panel, and tighten the screws with the screwdriver.
Figure 1: Removing an SRE Module from an EX8208 Switch
Removing an SRE Module
from an EX8208 Switch

Installing an SRE Module in an EX8208 Switch

You can install either one or two Switch Fabric and Routing Engine (SRE) modules in an EX8208 switch. The SRE modules install horizontally in the front of the chassis in the slots labeled SRE0 and SRE1.

Note

We recommend that you install two SRE modules for redundancy. If you install only one SRE module, we recommend that you install it in the slot SRE0.

Caution

Do not lift the SRE module by holding the ejector levers. The levers cannot support the weight of the module. Lifting the modules by the levers might bend the levers, and the bent levers will prevent the SRE module from being properly seated in the chassis.

Before you begin installing an SRE module in an EX8208 switch:

Ensure that you have the following parts and tools available to install an SRE module:

  • Electrostatic discharge (ESD) grounding strap

  • Phillips (+) screwdriver, number 2

To install an SRE module in an EX8208 switch (see Figure 2):

  1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Taking care not to touch the leads, pins, or solder connections, pull the SRE module out from the bag.
  3. Pull both the ejector levers outward, away from the faceplate of the SRE module, until they go no further.
  4. If the slot has a cover panel on it, unscrew the two screws on either side of the cover panel counterclockwise using the Phillips (+) screwdriver, number 2. Remove the cover panel. Save the cover panel for later use.
  5. Carefully align the sides of the SRE module with the guides inside the chassis.
  6. Ensuring that the SRE module is correctly aligned, carefully slide it into the chassis until you feel resistance.
  7. Push both the ejector levers towards the faceplate of the SRE module until the levers are flush against the faceplate and are fully engaged.
  8. Tighten the screws, one on each side of the SRE module, by turning them clockwise using the Phillips (+) screwdriver, number 2. Ensure that the SRE module is fully seated in the chassis. It must be fully seated in order for it to be powered up.
  9. Verify that the SRE module is installed correctly and functioning normally by checking the LEDs on the faceplate of the SRE module. The ON LED and ST LED should be lit steady green a few minutes after the SRE module is installed.

    If the ON LED is unlit, verify that there are enough power supplies installed. See Calculating Power Requirements for an EX8208 Switch. If more power supplies are needed, install additional power supplies. See Installing an AC Power Supply in an EX8200 Switch. If there are enough power supplies in the switch, remove and install the SRE module again. See Removing an SRE Module from an EX8208 Switch.

    If the ST LED is lit steady yellow, the SRE module has failed. Remove the module and install a new SRE module. See Removing an SRE Module from an EX8208 Switch.

Figure 2: Installing an SRE Module in an EX8208 Switch
Installing an SRE
Module in an EX8208 Switch

Taking the SF Module Offline in an EX8208 Switch

The SF module provides switching functionality for an EX8208 switch. Your switch can have either zero SF modules or one SF module.

Note

If you take the SF module offline in a switch configuration having only one Switch Fabric and Routing Engine (SRE) module, throughput will be low.

To take the SF module offline:

  1. Take the SF module offline:

    user@switch> request chassis cb offline slot 2

    For an SF module, the control board slot number is always 2.

  2. (Optional) Confirm that the SF module is offline:

    user@switch> show chassis environment cb slot-number

    The state field in the command output shows that the SF module is offline. It is now safe to remove or replace the SF module.

Removing an SF Module from an EX8208 Switch

You must remove the Switch Fabric (SF) module from the EX8208 switch if you need to replace the module or if you need to remove the switch components before moving the chassis without using a mechanical lift.

The SF module is always installed in the slot labeled SF.

Note

Do not lift the SF module by holding the ejector levers. The levers cannot support the weight of the module. Lifting the modules by the levers might bend the levers. Bent levers will prevent the SF module from being properly seated in the chassis.

Before you begin to remove an SF module:

Ensure that you have the following parts and tools available to remove an SF module:

  • Electrostatic discharge (ESD) grounding strap

  • Phillips (+) screwdriver, number 2

  • Antistatic bag or antistatic mat

  • Replacement SF module or cover panel for the slot



To remove an SF module (see Figure 3):

  1. Take the SF module offline. See Taking the SF Module Offline in an EX8208 Switch.
  2. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to the ESD point on the chassis.
  3. Place the antistatic bag or antistatic mat on a flat, stable surface.
  4. Loosen the screws on each side of the SF module by turning them counterclockwise using the screwdriver until they are completely unseated.
  5. Pull both the ejector levers outwards, away from the faceplate of the SF module, until they go no further. This action causes the SF module to slide out of the chassis slightly.
  6. Grasping the ejector levers, pull the SF module to about halfway out.
  7. Taking care not to touch the leads, pins, or solder connections, place one hand underneath the SF module to support it and slide it out of the chassis completely.
  8. Place the SF module in the antistatic bag or on the antistatic mat.
  9. If you are not replacing the SF module, install the cover panel over the empty slot by tightening the screws on each side of the cover panel with the screwdriver.
Figure 3: Removing an SF Module from an EX8208 Switch
Removing an SF Module
from an EX8208 Switch

Installing an SF Module in an EX8208 Switch

You can install either zero Switch Fabric (SF) modules or one SF module in an EX8208 switch depending on the switch configuration you want to have. One SF module is included in the base configuration. See EX8208 Switch Configurations.

The SF module can be installed only in the slot labeled SF. The SF module is keyed so that it does not fit in any other slot in the chassis.

Note

Do not lift the SF module by holding the ejector levers. The levers cannot support the weight of the module. Lifting the module by the levers might bend the levers. Bent levers prevent the SF module from being properly seated in the chassis.

Before you begin installing an SF module in an EX8208 switch:

Ensure that you have the following parts and tools available to install an SF module:

  • Electrostatic discharge (ESD) grounding strap

  • Phillips (+) screwdriver, number 2

To install an SF module (see Figure 4):

  1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. If the slot has a cover panel on it, use the Phillips (+) screwdriver, number 2 to remove the two screws on each side of the cover panel. Save the cover panel for later use.
  3. Taking care not to touch the leads, pins, or solder connections, pull the SF module out from the bag.
  4. Pull both the ejector levers outwards, away from the faceplate of the SF module, until they go no further.
  5. Align the sides of the SF module with the guides inside the chassis.
  6. Ensuring that the module remains correctly aligned, slide the SF module into the chassis until you feel resistance.
  7. Push both the ejector levers towards the faceplate of the SF module until the levers are flush against the faceplate and are fully engaged.
  8. Tighten the screws on each side of the SF module by turning them clockwise using the Phillips (+) screwdriver, number 2. Ensure that the SF module is fully seated in the chassis.
  9. Verify that the SF module is installed correctly and functioning normally by checking the LEDs on the faceplate of the SF module. The ST LED and SF LED should be lit steady green a few minutes after the SF module is installed.

    If the ST LED is unlit, check whether there are enough power supplies installed. See Calculating Power Requirements for an EX8208 Switch. If more power supplies are needed, install additional power supplies. See Installing an AC Power Supply in an EX8200 Switch. If there are enough power supplies in the switch, remove and install the SF module again. See Removing an SF Module from an EX8208 Switch.

    If the ST LED or the SF LED is lit steady yellow, the SF module has failed. Remove the SF module and install a new one. See Removing an SF Module from an EX8208 Switch.

Figure 4: Installing an SF Module in an EX8208 Switch
Installing an SF Module
in an EX8208 Switch