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S9300, S9300E, and S9300X Series Switches Hardware Installation and Component Replacement

This document describes hardware installation procedures of the S9300, S9300E, and S9300X series switches, troubleshooting methods for common hardware faults, and switch maintenance instructions.

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Replacing a CSS Card or Enhanced Flexible Service Unit

Replacing a CSS Card or Enhanced Flexible Service Unit


For the S9300&S9300E, a CSS card or enhanced flexible service unit (FSU) can be installed in the subcard slot of an MPU.

  • CSS cards and enhanced FSUs (except the LE1D2VS04000) are not hot swappable.
  • To replace a CSS card or enhanced FSU that is not hot swappable, remove the MPU where it is installed first. Do not remove the CSS card or enhanced FSU from the MPU directly.

  • If two MPUs in a switch are both configured with a CSS card or enhanced FSU that is not hot swappable, power off the switch before removing the CSS cards or enhanced FSUs.

The following procedure replaces a CSS card of an S9300 switch. The procedure for replacing an enhanced FSU is similar.

Tools and Accessories

  • ESD wrist strap or ESD gloves
  • Phillips screwdriver


  1. Wear an ESD wrist strap or ESD gloves. When wearing an ESD wrist strap, insert the other end of the strap into an ESD jack and ensure that the equipment where the ESD jack is located has been reliably grounded.
  2. Record the cable locations on the old CSS card and check whether the labels on the cables are correct and clear. If any label is unclear, make and attach a new label to cable to ensure correct connection.
  3. Remove cables from the old CSS card.

    • To remove a cable, release the handle on the cable connector, gently push the cable connector by the handle, and then unplug the cable.

    • You can use the tweezers delivered with the switch to remove the cables.

  4. (Optional) Remove the MPU where the old CSS card is located.
  5. Remove the CSS card from the MPU.
    1. Use a Phillips screwdriver to loosen the captive screws on both ends of the CSS card. See callout 1 in Figure 13-9.
    2. Hold the handle of the CSS card and pull the CSS card slowly along the guide rails. See callout 2 in Figure 13-9.

    Figure 13-9 Removing the CSS card

  6. (Optional) Install the MPU back to the chassis. For the installation method, see Installing a Card.
  7. Install the new CSS card. For details, see (Optional) Installing a CSS Subcard or an Enhanced Flexible Service Subcard.
  8. Install optical modules or network cables according to the recorded connections. See Connecting High-Speed Cables or Installing Optical Modules and Connecting Optical Fibers.
  9. Observe the RUN/ALM indicator on the new CSS card.

    It takes less than 5 minutes for the CSS card to start and register.
    • If the RUN/ALM indicator blinks green fast, the CSS card is starting.
    • If the RUN/ALM indicator blinks green slowly, the CSS card is running normally.

  10. Verify the functions of new CSS card.

    After installing the new CSS card, use either of the following methods to check whether the CSS card functions normally:

    • Check the RUN/ALM indicator. If the RUN/ALM indicator is steady red, the CSS card does not work normally.

    • Run the display device command to check the running status of the new CSS card.

Follow-up Procedure

After replacing the CSS card or enhanced flexible service unit, collect all tools. If the replaced CSS card or enhanced flexible service unit is faulty, fill in the Repair Transmission Sheet and send the faulty module with the Repair Transmission Sheet to the equipment supplier or the specified repair service provider.

Updated: 2019-11-30

Document ID: EDOC1000069582

Views: 28258

Downloads: 463

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