This read-only value reports how many sessions (such as active TCP/UDP flows being tracked by the device's stateful inspection engine) currently exist on the H3C device. An administrator monitors this as a general load and capacity indicator, since a device's session table has a finite maximum size and approaching that limit can start causing new connections to be rejected. For example, a firewall showing a session count steadily climbing toward its documented maximum during a traffic surge would be a signal to investigate what's driving the growth before sessions start getting dropped.