Sonicwall HA single F5 and multiple port (1.1 - 1.2)

Hi guys,

 

i need help how to configure F5 to have HA failover in case of one of firewall goes down. Actually i've port 1.1 and 1.2 that goes to firewall1 and to firewall2, there is a simple /30 between firewall and f5 and routing particular network (192.168.0.0/16 to F5 that has a network VIP for this network). Now i've only one link attached (1.1), if I want a failover in case one of the firewall goes down how I can implement it? First idea is to make two static route with different metric and assign a different self IP to F5 on the second port, so on the firewall I can put the same route with metric 2 and on F5 the same for reply.

 

There is another method? I cannot use STP because the two firewall are independent.

 

Thanks!