iRule - Source Port persistence for a specific subnet else only source addr persistence

Thanks Odaah, I am not using persistence profile for this VIP. Do I have to ? and so the the complete iRule would looks like this. Please verify !!!

 when CLIENT_ACCEPTED {
   if {[class match [IP::client_addr] equals "datagroup_dg"]}{
     set client_ip_port "[IP::client_addr]:[TCP::client_port]"
     persist uie $client_ip_port
   }
   else {
          persist uie [IP::client_addr]
   }
}    

and also I wanted to know the datagroup format can you please verify the following:

ltm data-group internal addr_testclass {
    records {
        10.1.1.0/24 { }
        {
            data "what is this part for ?"
        }
    }
    type ip
}