Need help regarding F5 LTM iRule

Hi, 

you have multiple ways: 

• The most perfect one is to take a Packet capture and have a look on it, try the below command: 
  • tcpdump -vvnni 0.0:nnnp host <your_IP> -s0 -vw /var/tmp/TestVS.pcap
    or
    tcpdump -vvnni 0.0:nnnp host <VS_IP> -s0 -vw /var/tmp/TestVS.pcap
    
    
  • use one of those commands you'll be able to see the client/server-side connections that hit this virtual server also you will see which pool selected for each connection.
• another Perfect way and easiest one, you can use display the active connections, using the below command: 
  • tmsh show /sys connection cs-server-addr <vs_ip> cs-server-port <vs_port>
  • look at these articles explain this command:
    • https://my.f5.com/manage/s/article/K53851362
    • https://my.f5.com/manage/s/article/K40033505
  • Consider using filters when using show sys connection command , don't run just " show sys connections " because in production environment it will give you huge amount of connections and you don't need them also it affects the device performance , so please use Filters like I used in the command above you can use ( VS IP or Client IP "source" ) in the first article you can navigate all filters/options that is used with this command. 
• you can also Reset all stats and check VS and Pools stats to validate that the VS receiving connections, but I prefer the first two methods. 

Thanks