Viewing Subscriptions Used in Both RHN Classic and Certificate-based CentOS Network
Administrators need to have a sense of all of the subscriptions allocated for their organization, altogether, regardless of whether the system is managed in RHN Classic or Certificate-based CentOS Network. The Customer Portal provides a way of looking at the total consumed subscriptions.
In the Subscriptions Overview page, the Subscription Utilization area at the top gives the current count for every active subscription for the entire organization, and a total count of every used subscription, regardless of whether it is used in RHN Classic or Certificate-based CentOS Network. These numbers are updated whenever the subscription count changes in the subscription server. (The subsequent Certificate-based CentOS Network and RHN Classic sections gives usage subcounts based on system which are registered to that specific subscription service.)

Figure 14.17. Total Counts of Subscriptions for All Subscription Services
RHN Classic is provided for legacy systems. Community Enterprise Operating System.7 and 6.1 and later systems should use Certificate-based CentOS Network to manage subscriptions for systems.