Cisco Catalyst 3850 Deployment Manual page 31

To assign the active and standby roles to specific switches, configure the default switch priority for all switches in
the stack. You configure the priority once, usually during the initial configuration process, but you can change the
configuration at any time. The configured switch priorities are immediately set in the boot loader configuration of
each switch in the stack. This means the switch priority configuration cannot be verified from the startup or running
configuration because it is programmed into different configuration components. The switch priority configuration in
boot loader is parsed during the boot cycle, not read from the startup configuration stored in NVRAM.
To modify the default switch priority, use these EXEC commands:
This example shows the priority of each switch and its role:
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