Important Information

• We recommend taking snapshots of all nodes that are part of the cluster before applying the patch - to be used for rollback if needed. See Rollback in this document.

• Adaptations: We recommend verifying the compatibility of any installed adaptations with this patch bundle in a lab before installing in production.

  Some adaptations might need to be re-installed post patch bundle installation.

• If you have a Microsoft-only environment and an existing number inventory, a rebuild of the number inventory may be needed.

• If you have a Webex Calling environment and an existing number inventory, a rebuild of the number inventory may be needed.

  Contact VOSS to verify and assist in carrying out this step.

• It is recommended that commands in installation steps are run in a terminal opened with the screen command.

• Ensure that you perform any mandatory post-upgrade patch installs (if required) for all deployment types.

• Maintenance mode: ensure that you place the system in maintenance mode prior to upgrading and end the maintenance mode when done. The cluster maintenance-mode command is indicated at the relevant steps below. For details on this command, refer to the System Maintenance Mode topic in the Platform Guide.