Version 6.6 829 October 2014
Installation & Operation Manual 46. Online Software Upgrade
46.7.1 Performing a Manual Rollback to the Previous Software
Configuration
This section describes how to perform a manual rollback to the previous software
configuration.
To perform a manual rollback to the previous software configuration:
1. Close the EMS Upgrade Wizard screen.
2. Connect to both SC boards via Telnet, SSH or Console (see .'Command Line
Interface' on page 107)
3. Login as root user. If you are performing Online Software Upgrade from Version
6.2 or an earlier software version, you may directly login as root user over the
remote IP connection (Telnet or SSH). Otherwise, see 'Command Line Interface
Users' on page 113.
4. To stop the Media Gateway software on both SC boards, type tools sc dn and
press Enter.
client208::~# tools sc dn
Note: Stop the Media Gateway software on both SC boards as described above.
5. If you can not connect via Telnet/SSH to some SC board, take these 3 steps:
a. Reboot the SC board by pressing RESET button on its front panel or pulling
it out of the chassis and re-inserting it back in.
b. Wait for 5 minutes until SC board completes the reboot.
c. Login to the board via Telnet/SSH as root user and stop the Media Gateway
software on it as described in step 4.
6. If you still cannot connect to a specific SC board via Telnet/SSH after completing
the previous step, then it’s highly likely that there is a hardware failure on the
board or a severely incorrect software configuration. Remove the failed SC board
from the chassis. For details on replacing a failed SC board, see 'SC Board
Replacement Procedure' on page 793.
Note: It is important to stop the Media Gateway software on both of the SC boards
and remove the failed SC boards from the chassis prior to proceeding to the next
step.
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