Chapter 19 Upgrading Avaya M770 ATM Switch Software
244 Avaya M770 ATM Switch User’s Guide
Downgrading the Main Software Version via TFTP from the CLI When returning to a previous Main S/W version, it is recommended to use the
configuration file that was created using the previous version. If a snapshot was not
taken with the previous version, a configuration file was automatically taken for
you and stored in flash after downloading and rebooting the module with the latest
Main S/W version. This file is called "oldconfiguration.X.Y.Z where X.Y.Z is the
Main Software version.
To return to a previous version you need to perform the following:
1 Change the main image that will be run on the next reboot by using the flash
default command:
2 Restore the appropriate configuration file (the one that was used with the
version changed in step 1 above), by typing the following:
3 After changing the configuration file and main image on each of the modules in
the M770 ATM switch, reboot the switch using the system reboot switch
command to run the previous version.
Note: It is recommended that all modules in the M770 ATM switch use the same
software version. To check which software is currently running on the ATM
module, use the command version.
Note: If a new configurarion file and S/W Main Image is changed at the same time,
a file called oldconfiguration.unknown will be saved in Flash memory on reboot of
this module.
Command: M15-155s8:/>flash default <filename>
Example M15-155s8:/>flash default m770ATM.2.0.16
Parameter: <filename> The name of th e image that the M770 ATM Switch will
next run.
Command: M15-155s8:/>/>flash config <filename>
Example M15-155s8:/>flash config oldconfiguration.1.2.14
Parameters: <filename> The name of the configuration file that you wish to
activate