30 BigIron RX Series Configuration Guide
53-1002253-01
Managing management module redundancy
3
A BigIron RX Multi-Service IronWare image contains the layer 1 – 3 software run by the
management module.
During startup or switchover, the active module compares the standby module’s flash code to
its own. If differences exist, the active module synchronizes the standby module’s flash code
with its own. If you update the flash code on the active module, the active module
automatically synchronizes (without comparison) the standby module’s flash code with its own.
• System-config file – The flash code also includes the system-config file. During startup or
switchover, the active module compares the standby module’s system-config file to its own. If
differences exist, the active module synchronizes the standby module’s system-config file with
its own. When you save changes to the system-config file on the active module, the active
module automatically synchronizes (without comparison) the standby module’s system-config
file with its own.
• Running-config – The running-config file resides in the BigIron RX Series system’s memory. The
running-config file is automatically synchronized (without comparison) from the active module
to the standby module at regular intervals. The default interval is 7 seconds.
Each active and standby management module also includes boot code, which is the code a module
runs when it first starts up. The boot code resides in each module’s boot flash. The boot code is not
synchronized between the two modules. The unsynchronized boot code allows the system to run
using an older version of boot code on the standby module if desired.
Whenever you load a new card into a device, check the card to ensure that it has the appropriate
boot code revision. If the boot code is from a previous version, then upgrade the code.
Figure 4 shows how the files are synchronized between the active module and the standby module.
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