Persistence issue with TCP

Ok, I finally fix it ^^

The issue was because I created a pool with 4 members, 2 same IP but different service port, cause we have 2 versions who using different socket

And I have 2 Virtual Services different (based on version) with an iRule different for each in order to select specific node with the target port. The irule was like this :

when CLIENT_ACCEPTED {

set xxx_node1 "13.x.x.183"
set xxx_node2 "40.x.x.221"
set xxx_ppol "pool_vm_xxx_prod"
set xxx_port yyyy

if { ([LB::status pool $xxx_ppol member $xxx_node1 $xxx_port] eq "up") and ([LB::status pool $xxx_ppol member $xxx_node2 $xxx_port] eq "up") }
{
    node $xxx_node1 $xxx_port
    node $xxx_node2 $xxx_port
}
elseif { ([LB::status pool $xxx_ppol member $xxx_node1 $xxx_port] eq "up") and ([LB::status pool $xxx_ppol member $xxx_node2 $xxx_port] eq "down") }
{
    node $xxx_node1 $xxx_port
}
elseif { ([LB::status pool $xxx_ppol member $xxx_node1 $xxx_port] eq "down") and ([LB::status pool $xxx_ppol member $xxx_node2 $xxx_port] eq "up") }
{
    node $xxx_node2 $xxx_port
}
else
{
    log "Error : Pool $xxx_ppol is down"
}

}

Finally, I just recreate 2 new pool specific to each version and on my 2 VS I associate this new pool based on target version and deleted the associated iRule.

And now, my traffic is correctly load balanced 😉

Thanks to all who help me in this situation

Have a nice day, Regards Alex