File synchronization after downloading
After downloading a new software version to either the primary or secondary flash of the active management module, the software version is immediately copied to the corresponding flash (primary or secondary) of the standby module, unless the standby module failed selftest or redundancy was disabled with the
no redundancy management-module command.
The configuration files, including which configuration file to use for that flash image, are synchronized. For example, if the active management module is using
config1, the standby module is also synchronized to use
config1.
Newer code to secondary flash |
New code to primary flash |
|||
|---|---|---|---|---|
Active MM |
Standby MM |
Active MM |
Standby MM |
|
Software version downloaded to Primary flash image |
K.15.01.0003 |
K.15.01.0003 |
K.15.01.0004 |
K.15.01.0004 |
Software version downloaded to Secondary flash image |
K.15.01.0004 |
K.15.01.0004 |
K.15.01.0003 |
K.15.01.0003 |
After installing the new software to the active management module, wait a few minutes, and then verify that the standby management module has been synchronized with the new software as well (use the
show flash command.) If the default flash for boot is set correctly, you can start the standby management module on the new software by executing the
boot standby command. This does not interrupt current switch operations yet. After the standby management module has rebooted and is ready for takeover in standby mode (you can verify this using the
show redundancy command.) you can now switch over to the management module running the newer software with this command:
Switch# redundancy switchover
This causes a switchover to the management module that received the new software version, which becomes the active management module. This method incurs the least amount of network downtime for booting. If downtime is not an issue, use the
boot system command. Both management modules are then running the new software version.