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Figure 1 - Architectural view of PSM sub-system
Figure 2 - Initialization of PSM sub-system
Configuration files are saved as below on the device:
Factory reset removes the configuration files from nvram and copies default file to nvram.
To prevent system configuration file from becoming corrupted or lost when the device is suddenly rebooted or power loss conditions, following counter-measures are in place:
Figure 3 - Reading Configuration
Restore configuration is tried first from the current system file. If it passes the verification, read is done otherwise restore configuration is tried from the backup system file. If it passes the verification, read is done otherwise restores the factory default configuration. This step has to succeed since there is no any other plan to back it up.
Figure 4 - Retrieving Parameter
Using CLI utility:
psmcli get <parameter name as in bbhm file>
Eg: psmcli get eRT.com.cisco.spvtg.ccsp.Device.WiFi.NotifyWiFiChanges
Figure 5 - Setting Parameter
Using CLI utility:
psmcli set <parameter name as in bbhm file>
Eg: psmcli set eRT.com.cisco.spvtg.ccsp.Device.WiFi.NotifyWiFiChanges true
PSM CLI operation information captured here PSM CLI Operations.