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Maintaining the EX9200 Host Subsystem

Taking the Host Subsystem Offline in an EX9200 Switch

Before removing a Routing Engine module (RE module) from an EX9200 switch, take the host subsystem offline.

The host subsystem performs switching and system management functions in an EX9200 switch.

To take a host subsystem offline:

  1. Determine whether the host subsystem is the primary or backup using one of these methods:

    • Look at the MASTER LED on the RE module faceplate. If the MASTER LED is lit steady green, the corresponding host subsystem is functioning as the primary.

    • Issue the show chassis routing-engine CLI command. The output of this command will show whether the host subsystem is functioning as the primary or backup.

  2. If the host subsystem is functioning as the primary, switch it to backup using the request chassis routing-engine master switch command.
  3. On the console or other management device connected to the primary Routing Engine, enter CLI operational mode and issue the request system halt command. The command shuts down the Routing Engine gracefully, so its state information is preserved.

    Wait until a message appears on the console confirming that the operating system has halted.

Note:

The Switch Fabric module (SF module) might continue forwarding traffic for approximately 5 minutes after the request system halt command has been issued.

Replacing SSDs on EX9200-RE2

Replacing SSDs on EX9200-RE2

A base configuration (single RE configuration) EX9204 and EX9208 switch has one host subsystem. A redundant configuration (dual RE configuration) EX9204 and EX9208 switch has a second host subsystem. A base configuration (single RE configuration) EX9214 switch has two host subsystems. A redundant configuration (dual RE configuration) EX9214 switch has a third host subsystem. Each host subsystem has one routing engine. So a switch with base configuration of one host subsystem has one routing engine; a switch with base configuration of two host subsytems has two routing engines etc. (EX9214 will have three host subsystem for two routing engines.)

Each EX9200-RE2 routing engine has two solid-stage drives (SSDs). The SSDs are installed in the slot labelled SSD1 and SSD2. The following figure shows the EX9200-RE2 module. The storage drive slots are annotated as 10 in the figure.

Figure 1: EX9200-RE2 Module in an EX9200 Switch EX9200-RE2 Module in an EX9200 Switch

  1. Extractor clips

  2. Auxiliary port (AUX)

  3. Console port (CONSOLE)

  4. Management port (MGMT)

  5. LEDs—ONLINE, OK/FAIL, and MASTER

  6. ONLINE/OFFLINE button

  7. SSD LEDs—DISK1 and DISK2

  8. USB ports—USB1 and USB2

  9. RESET button

  10. SSD slots—SSD 1 and SSD 2

When replacing an SSD drive on an EX9200-RE2 Routing Engine on an EX9204, EX9208, and EX9214 with base configuration (single RE configuration) or redundant configuration (dual RE configuration), the procedure consists of two stages, namely, replacing the SSD Drive in the Routing Engine and copying vmhost and Junos OS to the replaced SSD.

Note:

Issue show vmhost hardware to check the disk size of the SSDs before and after the upgrade. Refer show vmhost hardware.
Note:

Ensure to keep a bootable USB disk ready if installing vmhost and Junos OS using an USB disk. To prepare a bootable USB disk, see Creating an Emergency Boot Device for Routing Engines with VM Host Support.

Replacing SSDs in the Routing Engine on an EX9204, EX9208, and EX9214 with base configuration (single RE configuration)

Note:

There will be a traffic hit during the SSD upgrade procedure for a switch with base configuration (single RE configuration) of one host subsystem (i.e. with a single routing engine).

To replace SSDs from the switch with only one routing engine:

  1. Offline the Routing Engine by pressing the ONLINE/OFFLINE button. Hold the ONLINE/OFFLINE button until the LED starts blinking and wait until all routing engine LEDs are off.

  2. Remove the SSDs:

    1. Attach an ESD grounding strap to your bare wrist, and connect the strap to an ESD point on the appliance. For more information about ESD, see Preventing Electrostatic Discharge Damage in the hardware guide for your router.

    2. Unfasten the thumbscrew that secures the access door in front of the storage drive slots, and open the door.

    3. Slide the lock on the ejector to the unlocked position.

    4. Carefully slide the drive out of the slot. See the following figure.

      Figure 2: Removing an SSD in the EX9200-RE2 Routing Engine Removing an SSD in the EX9200-RE2 Routing Engine

  3. Reinstall with the upgraded SSDs:

    1. Carefully align the sides of the drive with the guides in the slot.

    2. Slide the drive into the slot until you feel resistance, carefully ensuring that it is correctly aligned.

    3. Close the access door and tighten the thumbscrew to secure the door. See the following figure.

      Figure 3: Installing the SSD in the EX9200-RE2 Routing Engine Installing the SSD in the EX9200-RE2 Routing Engine

  4. Copy Junos OS and vmhost to the upgraded SSDs. There are two ways to install Junos OS and vmhost on the routing engine.

    • Install Junos OS and vmhost using an USB disk

    • Install Junos OS and vmhost using the PXE Boot method.

    Install Junos OS and vmhost using an USB disk:

    1. Insert the USB disk in the USB slot on the routing engine.

    2. Login to the routing engine through the console session.

    3. Bring the routing engine online by pressing the ONLINE/OFFLINE button.

    4. After the routing engine boots from the USB, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N? on the console.

    5. After the installation is completed, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

    Note:

    To prepare a bootable USB disk, see Creating an Emergency Boot Device for Routing Engines with VM Host Support.

    Install Junos OS and vmhost using the PXEBoot method:

    1. Set up the PXEBoot server. See Copying VM Host Installation Package to the PXE Boot Server.

    2. Bring the routing engine online by pressing the ONLINE/OFFLINE button.

    3. During the boot, when you see the message Press Esc for boot options press Esc key to enter into the BIOS menu boot options. After the Esc key is pressed, Esc is pressed. Go to boot options. is displayed on the screen.

    4. Using Up or Down arrow keys, navigate to Boot Manager and press the Enter key.

    5. Using Up or Down arrow keys, navigate through the EFI boot devices listed and select EFI Network 0 for IPv4 to boot from the PXEboot server and press the Enter key.

    6. Booting `net boot console is displayed and PXEBoot continues.

      Note:

      The booting process may take several minutes.

    7. After the routing engine boots, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N? on the console.

    8. After the installation is completed, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

Note:

Ensure that a routing engine does not contain a mix of 50 GB and 200 GB SSDs. Ensure that the SSDs on a routing engine are from the same vendor and not from different vendors. Both SSDs in the routing engine must be the same type and must contain the same disk capacity. So upgrade the two 50 GB SSDs to 200 GB SSDs at once, because mixed-mode operation is not supported.

Replacing SSDs on EX9200-RE2 on an EX9204, EX9208, and EX9214 with redundant configuration (dual RE configuration)

To replace SSDs in the switch that is using redundant routing engines:

  1. Configure the set chassis redundancy gracefulswitchover, set system commit synchronize, and set routing-options nonstop-routing commands to enable graceful switchover (GRES), commit synchronize (required for nonstop routing) and nonstop routing (NSR).

  2. Bring the backup routing engine offline by pressing the ONLINE/OFFLINE button. Hold the ONLINE/OFFLINE button until the LED starts blinking and wait until all routing engine LEDs are off.

  3. From the backup routing engine, remove the SSDs.

    1. Attach an ESD grounding strap to your bare wrist, and connect the strap to an ESD point on the appliance.

    2. For more information about ESD, see Preventing Electrostatic Discharge Damage in the hardware guide for your router.

    3. Unfasten the thumbscrew that secures the access door in front of the storage drive slots and open the door.

    4. Slide the lock on the ejector to the unlocked position.

    5. Carefully slide the drives out of the slot. See the following figure..

      Figure 4: Removing an SSD in the EX9200-RE2 Routing Engine Removing an SSD in the EX9200-RE2 Routing Engine

  4. Install the upgraded SSDs:

    1. Carefully align the sides of the drive with the guides in the slot.

      See the following figure.

      Figure 5: Installing the SSD in the EX9200-RE2 Routing Engine Installing the SSD in the EX9200-RE2 Routing Engine

    2. Slide the drive into the slot until you feel resistance, carefully ensuring that it is correctly aligned.

    3. Close the access door and tighten the thumbscrew to secure the door.

  5. Copy Junos OS to the newly replaced SSDs. There are two ways to install Junos OS and vmhost on the routing engine.

    • Install Junos OS and vmhost using an USB disk

    • Install Junos OS and vmhost using the PXE Boot method.

    Install Junos OS and vmhost using an USB disk:

    1. Insert the USB disk in the USB slot on the routing engine.

    2. Login to the routing engine through the console session.

    3. Bring the routing engine online by pressing the ONLINE/OFFLINE button.

    4. After the routing engine boots from the USB, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N? on the console.

    5. After the installation is completed, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

    Note:

    To prepare a bootable USB disk, see Creating an Emergency Boot Device for Routing Engines with VM Host Support.

    Install Junos OS and vmhost using the PXEBoot method:

    1. Set up the PXEBoot server. See Copying VM Host Installation Package to the PXE Boot Server.

    2. Bring the routing engine online by pressing the ONLINE/OFFLINE button.

    3. During the boot, when you see the message Press Esc for boot options press Esc key to enter into the BIOS menu boot options. After the Esc key is pressed, Esc is pressed. Go to boot options. is displayed on the screen.

    4. Using Up or Down arrow keys, navigate to Boot Manager and press the Enter key.

    5. Using Up or Down arrow keys, navigate through the EFI boot devices listed and select EFI Network 0 for IPv4 to boot from the PXEboot server and press the Enter key.

    6. Booting `net boot console is displayed and PXEBoot continues.

      Note:

      The booting process may take several minutes.

    7. After the routing engine boots, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N? on the console.

    8. After the installation is completed, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

  6. Log in to the backup routing engine through the console session.

  7. Bring the backup routing engine online by pressing the ONLINE/OFFLINE button.

  8. After the backup routing engine starts booting from the USB, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N?] on the console. 

  9. After the installation completes, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

  10. Once the backup Routing Engine boots:

    1. Verify if the backup Routing Engine is online by entering the show chassis routing-engine CLI.

    2. Verify the new SSDs capacity by entering the show vmhost hardware CLI.

    3. Enter show vmhost version to verify that the vmhost versions are the same as the primary Routing Engine.

    4. From the primary Routing Engine, perform commit synchronize command.

    5. If the Network Services Mode: Enhanced-IP configuration was previously applied, then a warning message indicating the changes in the network services mode displays. Perform a reboot on the backup Routing Engine in order to enable the Network Services Mode to apply Enhanced IP.

  11. Ensure both the Routing Engines (primary and backup) are in sync and ready for the switchover:

    1. On the backup Routing Engine, verify the GRES readiness by entering the show system switchover CLI.

    2. On the primary Routing Engine check the switchover state by entering request chassis routing-engine master switch check.

    3. On the primary Routing Engine, check the replication state if nonstop-routing is enabled by entering the show task replication CLI.

  12. Switch the current primary Routing Engine to become the backup Routing Engine and vice-versa by executing the request chassis routing-engine master switch command on the current primary Routing Engine.

  13. Once the Routing Engine which was previously the back-up Routing Engine becomes the primary Routing Engine and is carrying traffic, repeat the steps on the new backup Routing Engine (which was previously the primary Routing Engine).

Note:

Ensure that the routing engine does not contain a mix of 50 GB and 200 GB SSDs. Ensure that the SSDs are from the same vendor and not from different vendors. Both SSDs in the routing engine must be the same type and must contain the same disk capacity. So upgrade the two 50 GB SSDs to 200 GB SSDs at once.

Ensure that the routing does not contain 200 GB SSDs from different vendors.

Replacing an SSD Drive in the Routing Engine One at a Time

During an upgrade procedure, you have to upgrade both SSDs at once. But there could be a situation when for example one of the two 200GB SSDs fails, and needs to be replaced. The following are the instructions to replace that SSD.

Note:

There will be a traffic hit during the SSD upgrade procedure for a switch with base configuration of one host subsystem (i.e. using one routing engine)

To replace an SSD in the slot labeled:

  1. Disk 2

    Disk 1

    Ensure that there is no VMHost %d Boot from alternate disk alarm in the output:

    user@host>show chassis alarm

    • Ensure that the router is booted up and running from an image from disk 1. Back up the currently running vmhost and Junos OS on disk 1 to ensure that both disk 1 and disk 2 have the same version of vmhost and Junos OS:

      user@host> request vmhost snapshot [partition]

    • Reboot the router from disk 2:

      user@host> request vmhost reboot disk2

    • Check for the presence of the VMHost %d Boot from alternate disk alarm in the output:

      user@host>show chassis alarm

  2. Offline the Routing Engine by pressing the ONLINE/OFFLINE button. Hold the ONLINE/OFFLINE button until the LED starts blinking and wait until all routing engine LEDs are off.

  3. Remove the SSD:

    1. Attach an ESD grounding strap to your bare wrist, and connect the strap to an ESD point on the appliance. For more information about ESD, see Preventing Electrostatic Discharge Damage in the hardware guide for your router.

    2. Unfasten the thumbscrew that secures the access door in front of the storage drive slots, and open the door.

    3. Slide the lock on the ejector to the unlocked position.

    4. Carefully slide the drive out of the slot. See the following figure.

      Figure 6: Removing an SSD in the EX9200-RE2 Routing Engine Removing an SSD in the EX9200-RE2 Routing Engine
    Note:

    Ensure that a routing engine does not contain a mix of 50 GB and 200 GB SSDs. Ensure that the SSDs on a routing engine are from the same vendor and not from different vendors. Both SSDs in the routing engine must be the same type and must contain the same disk capacity.

  4. Reinstall the SSD:

    1. Carefully align the sides of the drive with the guides in the slot.

    2. Slide the drive into the slot until you feel resistance, carefully ensuring that it is correctly aligned.

    3. Close the access door and tighten the thumbscrew to secure the door. See the following figure.

      Figure 7: Installing the SSD in the EX9200-RE2 Routing Engine Installing the SSD in the EX9200-RE2 Routing Engine

  5. Copy Junos OS to the newly replaced SSD. There are two ways to install Junos OS and vmhost on the routing engine.

    • Install Junos OS and vmhost using an USB disk

    • Install Junos OS and vmhost using the PXE Boot method.

    Install Junos OS and vmhost using an USB disk:

    1. Insert the USB disk in the USB slot on the routing engine.

    2. Login to the routing engine through the console session.

    3. Bring the routing engine online by pressing the ONLINE/OFFLINE button.

    4. After the routing engine boots from the USB, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N? on the console.

    5. After the installation is completed, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

    Note:

    To prepare a bootable USB disk, see Creating an Emergency Boot Device for Routing Engines with VM Host Support.

    Install Junos OS and vmhost using the PXEBoot method:

    1. Set up the PXEBoot server. See Copying VM Host Installation Package to the PXE Boot Server.

    2. Bring the routing engine online by pressing the ONLINE/OFFLINE button.

    3. During the boot, when you see the message Press Esc for boot options press Esc key to enter into the BIOS menu boot options. After the Esc key is pressed, Esc is pressed. Go to boot options. is displayed on the screen.

    4. Using Up or Down arrow keys, navigate to Boot Manager and press the Enter key.

    5. Using Up or Down arrow keys, navigate through the EFI boot devices listed and select EFI Network 0 for IPv4 to boot from the PXEboot server and press the Enter key.

    6. Booting `net boot console is displayed and PXEBoot continues.

      Note:

      The booting process may take several minutes.

    7. After the routing engine boots, press y when you are prompted to confirm Install vmhost and Junos software on Primary and Secondary disk [y/N? on the console.

    8. After the installation is completed, press y when prompted to confirm Reboot now? [y/N]? to reboot from the SSD disk.

Removing an RE Module from an EX9200 Switch

Before you begin to remove an RE module:

CAUTION:

Before you remove an RE module, you must take the host subsystem offline. If there is only one RE module installed in the switch, taking the host subsystem offline shuts down the switch.

CAUTION:

If the RE module to be removed is functioning as the primary Routing Engine, switch it to be the backup Routing Engine before removing it.

Ensure that you have the following parts and tools available:

  • ESD grounding strap

  • Phillips (+) screwdrivers, number 1 and 2

  • Antistatic bag or antistatic mat

CAUTION:

Do not lift the Routing Engine module (RE 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 RE module from being properly seated in the chassis.

To remove an RE module from an EX9200 switch:

  1. Take the host subsystem offline. See Taking the Host Subsystem Offline in an EX9200 Switch.
  2. Place the antistatic bag or antistatic mat on a flat, stable surface.
  3. Attach the ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  4. Verify that the RE module LEDs are off.
  5. Loosen the screws on each side of the RE module by turning them counterclockwise using the screwdriver until they are completely unseated.
  6. Flip the ejector handles outward to unseat the RE module.
  7. Grasp the RE module by the ejector handles and slide it about halfway out of the chassis.
  8. Taking care not to touch the leads, pins, or solder connections, place one hand underneath the RE module to support it and slide it completely out of the chassis.
  9. Place the RE module in the antistatic bag or 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.

    Note:

    To maintain proper airflow through the chassis, do not leave an Switch Fabric module (SF module) installed in the chassis without an RE module for extended periods of time. If you remove an RE module, install a replacement RE module as soon as possible.

Figure 8 shows removing an RE module from an EX9204 switch. The procedure is the same for all EX9200 switches.

Figure 8: Removing an RE Module from an EX9200 SwitchRemoving an RE Module from an EX9200 Switch

Installing an RE Module in an EX9200 Switch

Before you begin installing an RE module in an EX9200 switch:

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

  • ESD grounding strap

  • Phillips (+) screwdrivers, number 1 and 2

The Routing Engine module (RE module) in an EX9200 switch is a hot-insertable and hot-removable field-replaceable unit (FRU); you can remove and replace it while the switch is running without turning off power to the switch or disrupting switching functions. Each RE module is installed horizontally in a Switch Fabric module (SF module) installed in the switch.

Note:

In an EX9214 switch, you must install an RE module only in the SF modules installed in slots 7 and 8 labeled 0 and 1.

CAUTION:

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

To install an RE module in an EX9200 switch:

  1. Attach the 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 RE module out from the bag.
  3. Ensure that the ejector handles are not in the locked position. If necessary, flip the ejector handles outward.
  4. Place one hand underneath the RE module to support it.
  5. Carefully align the sides of the RE module with the guides inside the RE module slot on the SF.
  6. Slide the RE module into the SF module until you feel resistance, and then press in the faceplate of the RE module until it engages the connectors.
  7. Press both of the ejector handles inward to seat the RE module.
  8. Tighten the screws, one on each side of the RE module, using a screwdriver.
  9. Connect the management device cables to the RE module.

    The RE module might require several minutes to boot.

    After the RE module boots, verify that it is installed correctly by checking the RE0 and RE1 LEDs on the craft interface. If the switch is operational and the Routing Engine is functioning properly, the ONLINE LED glows steady green. If the FAIL LED glows red steadily instead, remove and install the RE module again. If the FAIL LED still glows red steadily, the RE module is not functioning properly. Contact your customer support representative.

    You can use the show chassis routing-engine command to check the status of Routing Engines.

Figure 9 shows installing an RE module in an EX9204 switch. The procedure is the same for all EX9200 switches.

Figure 9: Installing an RE Module in an EX9200 SwitchInstalling an RE Module in an EX9200 Switch
Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

See Also

Upgrading an EX9200-SF to an EX9200-SF2

For an EX9200 switch, if you want to upgrade the original SF module, EX9200-SF, with the high-speed SF module, EX9200-SF2, follow these steps:

Preparing the EX9200 Switch for an EX9200-SF2 Upgrade

To prepare the switch for the upgrade:

  1. Verify that the system runs Junos OS Release 14.1 or later by issuing the show version command on the switch.
    Note:

    The EX9200-SF2 is supported only on Junos OS Release 14.1 or later.

    The latest software ensures a healthy system—that is, a system that comprises Routing Engines, control boards, and FPCs—before the upgrade.

  2. If the system is NOT running Junos OS Release 14.1 or later, upgrade the software now.

    For information about how to verify and upgrade Junos OS, see the Junos OS Installation and Upgrade Guide.

Powering Off the Switch

You must power off the switch before you install EX9200-SF2. See Powering Off an EX9200 Switch.

Removing a Routing Engine from an EX9200-SF Module

To remove a Routing Engine from the EX9200-SF:

  1. Remove the cables connected to the Routing Engine.
  2. Place an electrostatic bag or antistatic mat on a flat, stable surface.
  3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  4. Loosen the captive screws on the top and bottom of the Routing Engine.
  5. Flip the ejector handles outward to unseat the Routing Engine.
  6. Grasp the Routing Engine by the ejector handles, and slide it about halfway out of the chassis.
  7. Place one hand underneath the Routing Engine to support it, and slide it completely out of the chassis.
  8. Place the Routing Engine on the antistatic mat.

Replacing the EX9200-SF with the EX9200-SF2

To replace the existing EX9200-SF with the EX9200-SF2:

  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.
  2. Remove and replace the offline EX9200-SF with the EX9200-SF2.

Installing a Routing Engine into an EX9200-SF2

To install a Routing Engine into an EX9200-SF2:

  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.
  2. Ensure that the ejector handles are not in the locked position. If necessary, flip the ejector handles outward.
  3. Place one hand underneath the Routing Engine to support it.
  4. Carefully align the sides of the Routing Engine with the guides inside the opening on the SF2.
  5. Slide the Routing Engine into the EX9200-SF2 until you feel resistance, and then press the faceplate of the Routing Engine until it engages the connectors.
  6. Press both of the ejector handles inward to seat the Routing Engine.
  7. Tighten the captive screws on the top and bottom of the Routing Engine.
  8. Connect the management device cables to the Routing Engine.

Completing the EX9200-SF2 Upgrade

To complete the upgrade procedure:

  1. Verify that the installation is successful and the EX9200-SF2 is online by issuing the show chassis environment cb command:

    Other details, such as, temperature, power, etc are also displayed along with the state.

  2. Verify that the fabric planes come online correctly by issuing the show chassis fabric summary command:
  3. Verify that the backup Routing Engine is back online by issuing the show chassis routing-engine 1 command:
  4. Verify that the EX9200-SF2s appear in output from the show chassis hardware command:

Upgrading to an EX9200-SF3

If you are upgrading to the EX9200-SF3 from an older SF module, the Routing Engine must be upgraded to the first supported Junos release for the EX9200-SF3 (20.3.R1) before you install it in the EX9200-SF3. Also, we recommend that you update the recovery snapshot with the 20.3R1 or later image before you begin the upgrade. If the Routing Engine fails to boot from the primary image, it will attempt to boot from the recovery image. Since the older recovery image does not support the EX9200-SF3, the Routing Engine will crash if it attempts to boot from the old recovery image.

CAUTION:

If you plug the Routing Engine into the EX9200-SF3 without first upgrading Junos to 20.3R1 or later, Junos might crash and go to a db prompt. Should this occur, you’ll need to recover the router by copying the Junos software image for the 20.3R1 or later release and then booting from the USB drive to install 20.3R1 Junos on the EX9200-SF3. The USB install will wipe out the router configuration and all user files on the Routing Engine.

Preparing the EX9200 Switch for an EX9200-SF3 Upgrade

To prepare the switch for the upgrade:

  1. Verify that the system runs Junos OS Release 20.3R1 or later by issuing the show version command on the switch.
  2. If the system is NOT running Junos OS Release 20.3R1 or later, upgrade the software now.

    For information about how to verify and upgrade Junos OS, see the Junos OS Installation and Upgrade Guide.

Powering Off the Switch

You must power off the switch before you install EX9200-SF3. See Powering Off an EX9200 Switch.

Removing a Routing Engine from an SF Module

To remove a Routing Engine from an SF Module:

  1. Remove the cables connected to the Routing Engine.
  2. Place an electrostatic bag or antistatic mat on a flat, stable surface.
  3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  4. Loosen the captive screws on the top and bottom of the Routing Engine.
  5. Flip the ejector handles outward to unseat the Routing Engine.
  6. Grasp the Routing Engine by the ejector handles, and slide it about halfway out of the chassis.
  7. Place one hand underneath the Routing Engine to support it, and slide it completely out of the chassis.
  8. Place the Routing Engine on the antistatic mat.

Replacing the EX9200-SF or EX9200-SF2 with the EX9200-SF3

To replace the existing SF module with the EX9200-SF3:

  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.
  2. Remove and replace the offline SF module with the EX9200-SF3.

Installing a Routing Engine into an EX9200-SF3

To install a Routing Engine into an EX9200-SF3:

  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.
  2. Ensure that the ejector handles are not in the locked position. If necessary, flip the ejector handles outward.
  3. Place one hand underneath the Routing Engine to support it.
  4. Carefully align the sides of the Routing Engine with the guides inside the opening on the EX9200-SF3.
  5. Slide the Routing Engine into the EX9200-SF3 until you feel resistance, and then press the faceplate of the Routing Engine until it engages the connectors.
  6. Press both of the ejector handles inward to seat the Routing Engine.
  7. Tighten the captive screws on the top and bottom of the Routing Engine.
  8. Connect the management device cables to the Routing Engine.

Completing the EX9200-SF3 Upgrade

To complete the upgrade procedure:

  1. Verify that the installation is successful and the EX9200-SF3 is online by issuing the show chassis environment cb command:

    Other details, such as, temperature, power, etc are also displayed along with the state.

  2. Verify that the fabric planes come online correctly by issuing the show chassis fabric summary command:
  3. Verify that the backup Routing Engine is back online by issuing the show chassis routing-engine 1 command:
  4. Verify that the EX9200-SF3s appear in output from the show chassis hardware command:

Removing an SF Module from an EX9200 Switch

Before you begin to remove an SF module:

Ensure that you have the following parts and tools available:

  • ESD grounding strap

  • Antistatic bag or antistatic mat

  • Replacement SF module or cover panel for the slot

You must remove the Switch Fabric module (SF module) from an EX9200 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. You can remove the SF module and the Routing Engine module (RE module) as a unit, or remove the RE module separately.

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.

CAUTION:

Before you replace an SF module, you must take the host subsystem offline. If there is only one host subsystem, taking the host subsystem offline shuts down the switch.

To remove an SF module:

  1. Take the host subsystem offline. See Taking the Host Subsystem Offline in an EX9200 Switch.
  2. Place the antistatic bag or antistatic mat on a flat, stable surface.
  3. Attach the ESD grounding strap to your bare wrist and connect the strap to the ESD point on the chassis.
  4. Rotate the ejector handles simultaneously counterclockwise to unseat the SF module.
  5. Grasp the ejector handles and slide the SF module about halfway out of the chassis.
  6. Place one hand underneath the SF module 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.

  7. If you are not replacing the SF module, install a cover panel over the empty slot.

Figure 10 shows removing an SF module from an EX9208 switch. The procedure is the same for all EX9200 switches.

Figure 10: Removing an SF Module from an EX9200 SwitchRemoving an SF Module from an EX9200 Switch

Installing an SF Module in an EX9200 Switch

Before you begin installing an SF module:

Ensure that you have the following parts and tools available:

  • ESD grounding strap

The Switch Fabric module (SF module) in an EX9200 switch is a hot-insertable and hot-removable field-replaceable unit (FRU); You can remove and replace it while the switch is running without turning off power to the switch or disrupting switching functions.

Note:

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

To install an SF module:

  1. Attach the 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, rotate the ejector handles simultaneously counterclockwise to unseat the cover panel.
  3. Grasp the ejector handles, and slide the cover panel out of the chassis. Save the cover panel for later use.
  4. Taking care not to touch the leads, pins, or solder connections, pull the SF module out from the bag.
  5. Rotate the ejector handles to a vertical position.
  6. Align the sides of the SF module with the guides inside the chassis.
  7. Ensuring that the module remains correctly aligned, slide the SF module into the chassis until you feel resistance.
  8. Rotate both the ejector handles simultaneously clockwise until the SF module is fully seated. Place the ejector handles in the proper position, horizontally and toward the center of the board.
  9. Verify that the SF module is installed correctly and functioning normally by checking the LEDs on the faceplate of the SF module.

    • The OK/FAIL LED glows steady green a few minutes after the SF module is successfully installed.

    • If the OK/FAIL LED is red, remove and install the SF module again. If the OK/FAIL LED is still red or is off, the SF module is not functioning properly. Contact your customer support representative.

  10. Check the status of the SF using the show chassis environment cb command:
    Note:

    The output is of an EX9208 switch. The output is similar for all EX9200 switches.

Figure 11 shows installing an SF module in an EX9208 switch. The procedure is the same for all EX9200 switches.

Figure 11: Installing an SF Module in an EX9200 SwitchInstalling an SF Module in an EX9200 Switch
Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

See Also

Maintaining the Host Subsystem in EX9200 Switches

Purpose

For optimum performance of an EX9200 switch, verify the condition of the host subsystem. The host subsystem comprises a Switch Fabric and a Routing Engine. Routing Engine module (RE module) is installed directly into a Switch Fabric module (SF module).

Action

On a regular basis:

  • Check the LEDs on the craft interface to view information about the status of the Routing Engines.

  • Check the LEDs on the SF module faceplate.

  • Check the LEDs on the RE module faceplate.

  • To check the status of the Routing Engines, issue the show chassis routing-engine command. The output is similar to the following:

    The output is of an EX9208 switch. The output is similar for all EX9200 switches.

  • To check the status of the Switch Fabrics, issue the show chassis environment cb command. The output is similar to the following:

    The output is of an EX9208 switch. The output is similar for all EX9200 switches.

To check the status of a specific Switch Fabric, issue the show chassis environment cb command and include the slot number of the SF. The output is similar to the following:

The output is of an EX9208 switch. The output is similar for all EX9200 switches.

For more information about using the CLI, see the Junos OS documentation.