Track and modify a route with EEM!

This script EEM aims to add or delete a static ip route. Each 10 seconds a ping is sent to a host. If this ping fails a static route is deleted. If this host responds, a route is added. If this host responds and if the route is already in the routing table, no change is done.

event manager applet Route_redisribute
 event tag 1.0 timer watchdog time 10
 action 001 cli command "enable"
 action 002 cli command "ping 10.1.37.3"
 action 003 regexp "!!" "$_cli_result"
 action 004 if $_regexp_result eq 1
 action 005  cli command "show ip route static"
 action 006  regexp "10.12.37.0/24" "$_cli_result"
 action 007  if $_regexp_result ne 1
 action 008   cli command "conf t"
 action 009   cli command "ip route 10.12.37.0 255.255.255.0 10.1.37.8 tag 100"
 action 010  end
 action 011 else
 action 012  continue
 action 013 else
 action 014  cli command "conf t"
 action 015  cli command "no ip route 10.12.37.0 255.255.255.0 10.1.37.8 tag 100"
 action 016 end
!
end


In order to debug this script, the following command is helpful:
debug event manager action cli