The procedure to revert the SBC Core application using the EMA is provided below. You can only revert the application for upgraded systems (offline or LSWU). You cannot revert a system to an older version after a server/system is ISO, or after installing the SBC software.

Warning

Clear the upgrade directory from both servers before reattempting further upgrades using the command rm -fr /var/log/sonus/upgrade/* under all the following conditions:

  • There is a need to revert the upgraded server after a single server upgrade while the peer is still on an older version.
  • A revert will be performed by doing a re-ISO.


Any configurations performed after the upgrade will be lost after the Revert. Once the revert completes, the configuration rolls back to the time stamp in the 'Last Used' field.

Once a revert is performed to a valid pre-6.0 SBC release, an upgrade to another pre-6.0 release is not supported. Upgrading to any other pre-6.0 releases requires the ConnexIP re-ISO installation. Refer to Re-Installing ConnexIP Operating System for SBC 5000 Series or Re-Installing ConnexIP Operating System for SBC 7000 Series for more information on ConnexIP re-ISO installation.


Important

This procedure is service impacting.

Note

The firmware is not reverted back to an earlier version because it is backwards compatible with earlier SBC versions.

Note

The Revert procedure is not supported on the SBC 5100 or SBC SWe. If you require reverting these platforms to the previous version, perform an Application installation, and then a Configuration restore.

Note

The images depicted here are only for examples and do not indicate the latest build. Refer to the release notes for correct build versions. 

Procedure

Perform the following procedure to revert the SBC Core application using the EMA.

  1. Call Ribbon RTS/GPS to request a software upgrade status reset. 

  2. Launch the EMA (from either the active or standby server). Refer to Logging into EMA in Platform Mode for guidance.

  3. Navigate to Monitoring > Dashboard > System and Software Info to verify the versions.
    (An example screenshot is shown below. Your actual software version may vary).

    New Application and OS Version

  4. Navigate to Administration > System Administration screen.

    System Administration Screen

  5. Click Revert Software Version.
    The Revert Software Version screen is displayed displaying the system or partition for the current version and the older version.
    (An example screenshot is shown below. Your actual software version may vary).

    Revert Software Screen

  6. Click to start the revert.

  7. A confirmation message appears on the screen informing you this action will change the boot software version to the previous release, plus warn you that this is a service-impacting action. Click Ok to proceed.

    Caution

    The Revert Software application simultaneously reverts both the Active and Standby server. Continuing the revert will reboot the upgraded server(s) to an earlier release. During this process, the browser session is lost necessitating logging back into the session.


    The Revert Software starts and changes the boot version to earlier version in both the active and standby server. For example, in this case, it is 06.02.00R000 version. You can see the revert status in the Log section.

    Revert Logs

    Continuing Revert Operation

  8. Once you see Rebooting message in the logs, log out from the EMA.

    Rebooting SBC Platform

Note

The revert operation takes approximately 15 to 20 minutes to complete.

Note

Beginning with 5.0 release, the Platform Manager is integrated into the EMA and hereafter referred to as EMA Platform Mode. So once it is reverted back to 3.x/4.x release, you may only use Platform Manager tool for further upgrades.

Note

The roles of Active and Standby server may interchange depends upon the server, which is booting first. In this case, WFDSBC01b completed the rebooting first and became active.