Datasheet

Table Of Contents
8-18
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 8 Cisco Transport Controller Operation
8.8 Software Revert
The revert feature is useful if a maintenance window closes while you are upgrading CTC software. You
can revert to the protect software load without losing traffic. When the next maintenance window opens,
complete the upgrade and activate the new software load.
Circuits created and provisioning done after a software load is activated (upgraded to a higher software
release) will be lost with a revert. The database configuration at the time of activation is reinstated after
a revert. This does not apply to maintenance reverts (for example, 4.6.2 to 4.6.1), because maintenance
releases use the same database.
To perform a supported (non-service-affecting) revert from Software R7.0, the release you want to revert
to must have been working at the time you first activated Software R7.0 on that node. Because a
supported revert automatically restores the node configuration at the time of the previous activation, any
configuration changes made after activation will be lost when you revert the software. Downloading
Release 7.0 a second time after you have activated a new load ensures that no actual revert to a previous
load can take place (the TCC2/TCC2P will reset, but will not be traffic affecting and will not change
your database).