iRule for reset TCP connection if pool down

Question

Hello,
I have a kind of health monitor for my DNS (tcp half open) which check every 30sec the VS on my F5 LTM. 
I would like the LTM reset connection when the VS is down. I tried this irule, my flow is deny by BIG IP even if I have my VS up.

when FLOW_INIT {
   if { [active_members [LB::server pool]] == 0 } {
      reject
   }

Thanks for your help!

tyler_shaw_9498 · Answer

You don't need to run an iRule when all pool members down.  Set the "Action On Service Down feature" within the virtual server to "reject":  https://support.f5.com/csp/article/K15095.&nbsp;

jason_reed · Answer

The irule doesn't work because you can not use a LB: (loadbalance) when FLOW_INIT - there hasn't been a LB decision yet.&nbsp;
use something like:
 when FLOW_INIT {
   if { [active_members http-pool] == 0 } {
      reset
   }
}&nbsp;

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iRule for reset TCP connection if pool down

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