How to Reset ALL Virtual ip:port stats and Overall Stats

ECV checks/monitors are exectued from each LTM. These will show up in the Active Connections graph on each unit and if you issue the " tmsh show /sys connection" command.

Some of these connections could also be cause by the IP Forwarding VS which makes the F5 act as a router for all non-specific VS connections. The Active Connections are probably just monitor checks but you could verify with tcpdump what type of traffic is actually hitting the standby LTM. This is why I asked you to confirm if any of your Virtual Servers are pointing to the self-ip of the LTM as their default gateway. If so, the forwarding VS is going to process those connections.