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Cannot recover connectivity of a managed Flex System chassis after replacing the rear LED card or midplane assembly

Lenovo XClarity Administrator manages devices using its universally unique identifier (UUID) and UUID-based trusted certificate. For Flex System chassis, the UUID is stored as part of the vital product data (VPD) on the rear LED card that is on the midplane assembly. When you replace the rear LED card or midplane assembly, you must transfer the UUID of the replaced rear LED cards to the new rear LED card.

  1. Obtain the UUID for the chassis. If the chassis is not operating, you can obtain the UUID by contacting Support and providing the machine type and serial number, which you can find on one of the chassis labels.

  2. Change the UUID for a chassis. See the Lenovo Flex System online documentation for your device for midplane/rear LED card replacement and UUID change instructions.

  3. Resolve untrusted certificates for the chassis.

    1. From the XClarity Administrator menu bar, click Hardware > Chassis. The All Chassis page is displayed.

    2. Select the chassis with the replaced part.

    3. Click All Actions > Security > Resolve Untrusted Certificates.

    4. Click Install Certificate.

    XClarity Administrator retrieves the current certificate from the target chassis and places it in the XClarity Administrator trust store, overriding the previous certificate for that chassis.

  4. Refresh inventory for the chassis by clicking All Actions > Inventory > Refresh Inventory.