Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

Anchor
Top
Top

Noprint
Panel
borderColorGreen
bgColorWhite
borderWidth2

Back to Table of Contents

 

Add_workflow_for_techpubs
AUTH1UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26ca3103e4, userName='null'}
JIRAIDAUTHDSC-11074
REV5UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26c85e00fa, userName='null'}
REV6UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26c7f1006d, userName='null'}
JIRAIDAPPR2DSC-12155
REV3UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26cd5a09f3, userName='null'}
JIRAIDAPPRDSC-11074
REV1UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26cd5a09f3, userName='null'}

For Release 16.0.0, the DSC 8000 supports rollback paths from Releases 16.0.0 to 14.x.y or 15.x.y.

...

Note

A software rollback process should only be performed in case severe issues occur shortly after the software upgrade. Any provisioning or configuration changes that have been made after an upgrade are lost after a rollback.

Software Rollback Terminology

The Software Revisions Utility (see the following figure) provides access to view rollback software version information for the DSC 8000.

Caption
0Figure
1Sonus DSC 8000 Software Revisions Utility Screen

Image Removed

You encounter the following terms in this chapter:

...

Because rollback happens after an upgrade, there is no new software on the system. The upgraded new software is now the current software, and the software that existed before the upgrade is now the previous software.

After you perform a rollback, the previous software becomes the current software, and the upgraded software is deleted from the system.

Pagebreak

 The following table provides you with an example for the terminology description.

Caption
0Table
1Example for Software Rollback Terminology
Software Version Status Version Before Rollback Version After Rollback
previous 15.0.0Not available
current 15.1.015.0.0
Info
titleNote

The current Software Version, 15.1.0, is removed from memory and replaced with Version 15.0.0 after the rollback.

 

The rollback to a previous software version is performed using the Express Rollback method. It is recommended that you do not run traffic during this process.

...

It is recommended that you review the software rollback terminology (see Software Rollback Terminology) before starting the procedure in this section (see Software Rollback Terminology).

...

Process) in this section.

Note

Do not log onto the system using the shared IP addresses on the Management CPUs during the rollback process described in this section. These addresses are disabled as part of the rollback process.

...

Tip
titleTip

Check the current status of the CPU, Ethernet Switch (MCH), and I/O cards in the system from the Software Revisions menu before performing the Rollback.

...

Enter the required software version to which you want to roll back (in this example, enter 1 for 15.0.0), and press ENTER.

       

Tip
titleTip

In the preceding step, if the express rollback analysis phase presents more than one choice of software to rollback to, there may be a software load mismatch scenario. The Express Rollback may be executed to get the system back to the required load; however, manual steps may be required to recover all CPUs. If you require help with establishing the correct software load that you want to roll back to, contact Customer Support.

...

Enter c, and press ENTER to continue. The software is rolled back for the I/Os, the Ethernet Switches, and the CPUs.

      

Tip
titleTip

The system automatically executes the rollback process; therefore, no input is required.

...

       

...

 

Tip
titleTip

Each CPU card is rebooted individually after the rollback. If the rollback process was executed from the Management CPU in slot 2, then this is the last CPU rollback performed in the sequence. Depending on the number of CPU cards present in the chassis, the rollback may take an extended period of time to complete.

     

...

Make sure the rollback was successful (see To verify that the rollback has been performed correctly)

         

Tip
titleTip

After the CPU rollback process is complete, the system may automatically reboot and you have to log onto the system again to continue your session.

Noprint

Back to Top

Pagebreak

...

Note
titleCaution

If an asterisk appears beside any of the system cards during the verification process, the rollback for the respective card was unsuccessful. In this case, is recommended that you contact Customer Support.

...

Make sure that the software and OS has been rolled back, all cards are running the same software, and that there is no asterisk beside any of the cards.

Tip
titleTip

The output of the “CPU Versions” command shows that the CPU card has “UPGRADED” status if this is the first time the command is issued after an upgrade. All subsequent “CPU Versions” commands show the number of processes running on each CPU.

Image Removed

...

Without entering a selection, press ENTER twice to display the Software Revisions menu.
 

...

To confirm the Ethernet Switch cards are also running the same software and OS as the CPU cards, select Switch Version, and press ENTER.
  

...

Without entering a selection, press ENTER twice to display the Software Revisions menu.

             

Noprint

Back to Top

Pagebreak