Exception of SLB recursive traffic

Hi guys. I have a question about SLB.

 

I will explain it easily.

 

BIGIP have 2 vlans, ext / int. have VIP 10.10.10.10:80 / floating IP 20.20.20.1 /

 

pool(named SLB) member 20.20.20.10:80 20.20:80 20.30:80

 

I set Virtual server enabled vlan ext and int(apply automap).

 

ex) Test_VS_ext -> VIP 10.10.10.10:80, vlan enabled ext, default pool SLB

 

Test_VS_int -> VIP 10.10.10.10:80, lan enabled int, SNAT automap, default pool SLB

 

In this situation, there are traffics, pool member(ex 20.20:80) call VIP and LBed (20.20:80)

 

on connection table,

 

20.20.20.20:10000 10.10.10.10:80 20.20.20.1:10000 20.20.20.20:80

 

client call VIP, cause of SLB, traffic returned itself.

 

I want to except this kinds of traffic.

 

Is there any options or not handle this by iRule?

 

thank you.