Failover IPSEC (Site-to-site) load-balance

Hi Dear Support/User

I have problem with configuration load balancing with 2 IPSEC tunnel

I have 2 site with 2 deference up-link i established IPSEC connection with astaro gateway security with 2 Cisco router i want to create fail-over link that means when ipsec tunnel 1 is disconnected automatically connect to second on or change traffic destination to othereone

can anyone can help me with best configuration