This read-only Counter32 reports, per its source description, the total number of users currently logged in across the entire IVE cluster, as opposed to just this node. Admins use this cluster-wide figure to track overall concurrent-user license consumption and to see the full picture of VPN usage rather than just one appliance's share. For example, clusterConcurrentUsers approaching the cluster's total licensed user limit would prompt an admin to plan for a license upgrade before users start getting rejected logins.