iRule to route http traffic based on destination (client)

I am new to iRules but would like to be able to route http and https responses based on destination. For example I have three subnets 192.168.30.0/24, 192.168.31.0/24 and 192.168.32.0/24. F5 LB has inerfaces to those subnets.

 

 

Requests are generated by clients on those subnets to VIP address say 10.10.10.10 (with pool members in subnet 172.23.43.0/24) via a router which has interfaces in each of the subnets and also VIP subnet .

 

 

I want responses from the pool members to clients on subnets 192.168.30.0 /24, 192.168.31.0/24 and 192.168.32.0/24 to be routed via gateway router, IP address 10.10.10.1 and avoid assymetric routing since F% can just send traffic to each of the directly connected subnet interface.

 

 

Can someone please help me with an iRule to allow the F% to route traffic via the router and avoid assymetric routing.

 

 

Thanks in advance.