EM316LNXNM-OT
Configuration Context
PN 1275005-100 Rev E6
62
6.11. Restoring Parameters (Restart / Hot-
Swap)
When the managed system is booted, the management module (EM316LNXNM) reads the 'startup-config'
file into its memory area called the configuration storage layer (CSL). These stored parameters form the
starting point for the running configuration of the application modules in the system.
Next, the EM316LNXNM sequentially interacts with each manageable application module installed in
the system.
If the module was not previously configured, then the EM316LNXNM writes the corresponding CSL
values into the module configuration. This module is marked as 'configured' for the next boot sequence
and the stored parameters will take precedence over the CSL values. The EM316LNXNM then looks for
the next installed module until all the manageable modules in the chassis are configured.
If the module was previously configured, then the EM316LNXNM tries to read the operating parameter
values from the module. The EM316LNXNM stores configuration values successfully read from each
module into the CSL, overwriting the corresponding values read from the 'startup-config' file.. If a value
is not readable, then the EM316LNXNM uses the value already stored in the CSL without overwriting the
values in the module. The EM316LNXNM then looks for the next installed module until all the manageable
modules in the chassis are configured.
The above process is very reliable, but an operational anomaly could cause the EM316LNXNM to read a
previously configured module as unconfigured. Such a reading anomaly would cause the EM316LNXNM
to overwrite the module configuration with the CSL values. This theoretical situation is suggested only as
a reminder to back up system configurations and to document critical parameter values.
