Most of those widgets are driven from filters, which are driven from real-time event data - i.e. stuff coming from logs. Usually network events come from firewalls, routers, switches, IPS/IDS, proxy servers, that sort of thing, so if you're sending log data from those, you'll likely see stuff in the network events widgets/filters.
We're not sniffing traffic, though NetFlow would be another way to accomplish that (or maybe Deep Packet Inspection) - in either case you'd be better suited checking to see if Netflow Traffic Analyzer or Network Performance Monitor can fill that gap.
For ports being used, you could also use Firewall Security Manager to take a look at your firewall rules. LEM could show you based on log data, if you're logging from your firewall and that's where you're interested in seeing data.
Anyway, guessing you're not seeing events since you're not logging from a firewall/router that's showing network traffic events?
