Alcatel-Lucent OmniSwitch AOS Release 7 Manual page 64

CMM Files
Scenario 4: Rollback to Previous Version of Switch Software
Later that year, a software upgrade is performed. The network administrator loads the new software via
FTP to the working directory and reboots the switch from that directory. Since the switch is specifically
booted from the working directory, the switch is running from the working directory.
After the reboot loads the new software from the working directory, it is discovered that an image file was
corrupted during the FTP transfer. Rather than having a disabled switch, the network administrator can
reboot the switch from the certified directory (which has the previous, more reliable version of the soft-
ware) and wait for a new version. In the meantime, the administrator's switch is still functioning.
This is illustrated below:
R W C
1. The new soft-
ware is installed in
the working direc-
tory.
page 3-8
R W C
2. The new soft-
ware is loaded via
a reboot from the
working directory.
Switch Rolls Back to Previous Software Version
OmniSwitch AOS Release 7 Switch Management Guide
Managing CMM Directory Content
R W C
3. A file is cor-
rupted and does
not boot correctly.
R W C
4. Switch reboots
from certified
directory rolling
back to the previ-
ous software ver-
sion.
March 2011