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Maintaining the PTX3000 Switch Interface Boards

Maintaining the PTX3000 Switch Interface Boards

Purpose

For optimum performance, verify the status of the Switch Interface Boards (SIBs).

Action

On a regular basis:

  • Check the LEDs on the SIB faceplate and craft interface.

    During normal operations:

    • The green OK LED on the SIB faceplate is lit.

    • The yellow FAIL LED on the SIB faceplate is not lit.

  • Issue the show chassis fabric topology command. During normal operations, the output for the command shows that the state of the online SIBs and FPCs links are in the OK state.

  • Issue the show chassis environment sib command. For more information about the commands, see the Junos OS manuals.

Replacing a PTX3000 Switch Interface Board

Removing a PTX3000 Switch Interface Board

Nine SIBs are installed in the PTX3000. The SIBs are located in the slots marked SIB0 through SIB8. Each SIB-SFF-PTX-240 weighs 1.5 lb (0.7 kg). Each SIB3-SFF-PTX weighs 1.9 lb (0.9 kg).

To remove a SIB (see Figure 1):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface.

  2. Open the ejector handle to unseat the SIB.
  3. Grasp the ejector handle, pull firmly, and slide the SIB about three-quarters of the way out of the chassis.
  4. 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 SIBRemoving a SIB

Installing a PTX3000 Switch Interface Board

Note:

FPC-SFF-PTX-T FPCs are not supported in a PTX3000 with SIB3-SFF-PTX SIBs.

Note:

If you are upgrading from SIB-SFF-PTX-240 SIBs to SIB3-SFF-PTX SIBs, we recommend that you perform the procedure described in Upgrading to SIB3-SFF-PTX SIBs in an Operational PTX3000.

Note:

Third-generation FPCs (FPC3-SFF-PTX) are supported only in a PTX3000 with SIB3-SFF-PTX SIBs. Third-generation FPCs and FPC-SFF-PTX-P1-A first-generation FPCs can interoperate with each other in the same system.

Each SIB-SFF-PTX-240 weighs 1.5 lb (0.7 kg). Each SIB3-SFF-PTX weighs 1.9 lb (0.9 kg). To install a SIB (see Figure 2):


  1. Place one hand underneath the SIB to support it.
  2. Slide the SIB into the chassis, carefully ensuring that it is correctly aligned.
  3. Grasp the ejector handle and press it inward to seat the SIB until the ejectors latch into the SIB.
  4. Bring the SIB online by using one of the following methods:
    • Press and hold the ONLINE/OFFLINE button on the SIB faceplate. The green OK LED on the faceplate begins to blink. Hold the button down until the LED blinks.

    • Issue the following CLI command on the PTX3000:

Figure 2: Installing a SIBInstalling a SIB

Upgrading to SIB3-SFF-PTX SIBs in an Operational PTX3000

Before you begin to upgrade an operational PTX3000 to SIB3-SFF-PTX SIBs:

  • Upgrade Junos OS on the PTX3000 to Junos OS Release 15.1F6 or later, or Junos OS Release 16.1R2 or later. For information about upgrading Junos OS, see the Junos OS Software Installation and Upgade Guide.

  • Unpack the new SIBs and verify the parts received. You can purchase an upgrade kit from Juniper Networks (PTX3K-FPC3-UPG-KIT) that includes nine SIB3-SFF-PTX SIBs.

  • Ensure that you have an antistatic bag for each of the old SIBs that you remove from the PTX3000.

Note:

Third-generation FPCs provide additional features when the enhanced-mode statement is configured at the [edit chassis network-services] hierarchy level. By default, the enhanced-mode statement is disabled. If you plan to configure the enhanced-mode statement, keep in mind the following guidelines:

  • After you configure the enhanced-mode statement and commit the configuration, you must reboot the router.

  • If the enhanced-mode statement is configured, only third-generation FPCs are powered on. Other FPCs cannot be brought online.

  • If the enhanced-mode statement is not configured, third-generation FPCs do not support advanced features.

This topic describes how to upgrade an operational PTX3000 to SIB3-SFF-PTX SIBs.

Note:

FPC-SFF-PTX-T FPCs are not supported in a PTX3000 with SIB3-SFF-PTX SIBs.

Note:

Third-generation FPCs (FPC3-SFF-PTX) are supported only in a PTX3000 with SIB3-SFF-PTX SIBs. Third-generation FPCs and FPC-SFF-PTX-P1-A first-generation FPCs can interoperate with each other in the same system.

To upgrade an operational PTX3000 to SIB3-SFF-PTX SIBs:

  1. Issue the following commands to verify the current state of the PTX3000, and the SIBs and FPCs currently installed in the system. If there are errors or alarms, do not proceed until you resolve the issues.
    • show chassis alarms—View the overall condition of the PTX3000. Resolve any alarms before proceeding.

    • show chassis fabric fpcs—Check the switch fabric links between the FPCs and the SIBs. The value of the Fabric management FPC state field should be Links ok. The Link error state indicates that the link between the SIB and FPC has CRC errors. However, the link is still eligible to carry traffic.

    • show chassis fabric sibs—Check the switch fabric links between the SIBs and FPCs. The value of the Fabric management SIB state field should be Links ok. The Link error state indicates that the link between the SIB and the FPC is not operational.

    Tip:

    If there are errors, the show chassis fabric topology command shows more details about the current fabric plane and link state. See Troubleshooting the PTX3000 Switch Interface Boards for more information.

  2. Reset the interface statistics by using the clear interface statistics all command so that you can easily determine whether any traffic drops are occurring during the procedure. Use the show interfaces statistics command to determine whether there are any errors.
  3. Include the fabric upgrade-mode default statement in the configuration of the PTX3000 at the [edit chassis] hierarchy level. See upgrade-mode for more information.
    Note:

    The fabric upgrade-mode default statement enables the router to continue forwarding traffic with different types of SIBs installed in the chassis. After the upgrade is complete you must delete the statement from the configuration.

  4. Commit the configuration on both the primary and the backup Routing Engines.
  5. Use the show configuration chassis operational mode command to verify that upgrade mode is set.

  6. Take one of the old SIBs offline by using the request chassis sib offline slot slot-number command. Leave the remaining SIBs online.
  7. Remove the offline SIB (see Figure 3):
    1. Open the ejector handle to unseat the SIB.
    2. Grasp the ejector handle, pull firmly, and slide the SIB about three-quarters of the way out of the chassis.
    3. 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 3: Removing an Old SIB-SFF-PTX-240 SIBRemoving an Old SIB-SFF-PTX-240 SIB
  8. Install the new SIB3-SFF-PTX SIB (see Figure 4):
    1. Place one hand underneath the SIB to support it.
    2. Slide the SIB into the chassis, carefully ensuring that it is correctly aligned.
    3. Grasp the ejector handle and press it inward to seat the SIB until the ejectors latch into the SIB.
    Figure 4: Installing a New SIB3-SFF-PTX SIBInstalling a New SIB3-SFF-PTX SIB
  9. Bring the new SIB3-SFF-PTX SIB online by using the request chassis sib online slot slot-number command.
  10. When the new SIB is online, check for any link errors or traffic drops with the following commands:
    • show chassis alarms—Ensure there are no active alarms.

    • show chassis sibs —The value of the state field should be Online, indicating that the SIBs are operational and running.

    • show interfaces statistics and show pfe statistics traffic—Ensure that there are no traffic drops.

    Note:

    If link errors or traffic drops occur at any point during the upgrade, you can reverse the upgrade procedure and return the PTX3000 to its original state by taking the new SIB3-SFF-PTX SIBs offline and replacing them with the original SIBs, one at a time. After the original SIBs are installed, use the commands mentioned above to verify that there are no longer any link errors or traffic drops. Finally, delete the fabric upgrade-mode default statement from the configuration of the PTX3000 at the [edit chassis] hierarchy level, and commit the configuration change.

  11. Repeat Step 7 through Step 11 until you have replaced each of the old SIBs with the new SIB3-SFF-PTX SIBs.
  12. Delete the fabric upgrade-mode default statement from the configuration of the PTX3000 at the [edit chassis] hierarchy level.
  13. Commit the configuration on both the primary and the backup Routing Engines.
  14. Check again for any issues with the following commands:
    • show chassis alarms

    • show chassis fabric fpcs

    • show chassis fabric sibs

    • show interfaces statistics

    • show pfe statistics traffic

    Note:

    After you upgrade to SIB3-SFF-PTX SIBs, you can install third-generation FPCs (FPC3-SFF-PTX) in the PTX3000 by using the normal FPC installation procedure (see Replacing a PTX3000 FPC).