Priority group activation and automatically closing connections when higher priorty group goes UP.

chmod +x /var/tmp/delete_backserver_session.sh

Because the 120 seconds delay depends on tcp monitor use "tcp_delay_up_120s" and its value of "Time Until Up" set to 120s. You can use tcl script tmsh:: delete to delete a session. The Linux shell is not mandatory

the file in /config/  directory will save in ucs，user_alert.conf and icall config also save in ucs file

In my test environment, six Cisco routers enable the telnet service, a bip IP VE. When I close the telnet service of the three primary nodes, and then the client telnet VS, I manage the router of the backup node, and then enable the telnet service of the primary node to simulate the recovery of the primary node. During the 120 seconds, I execute the show running command. After about 120 seconds, I will be reset tcp connection