Hi Alexey,
To perform warm reboot, kindly use the command hareboot.
Use this command to perform warm reboot in the switch-based systems. On chassis-based systems, this command
behaves similar to the haFailover command so that the standby CP becomes the active CP.
In chassis-based systems, if the active and standby CPs are not synchronized or the system is not in the redundant mode,
the command aborts.
When the switch-based system is not fully up or stable, the haReboot command cannot be completed.
Ref: