Value Acquisition for Multiple Subscriptions
A subscriber can have multiple subscriptions, each with different service parameters, to the same service. When a subscriber has multiple subscriptions to the same service, each subscription has a different name. The name is determined by the parameters. Different subscribers can have subscriptions with the same name.
As described previously, the SAE considers the subscriptions of parent subscribers when it acquires parameters for the policy of a subordinate subscriber who has one subscription to a service. When acquiring parameters for the policy of a subordinate subscriber who has multiple subscriptions to a service, however, the SAE considers the parent subscriber’s subscription only if it has the same name as the subordinate subscriber’s subscription.
Figure 1 shows an example that illustrates this concept.
In this example, an enterprise called Acme contains a site called Ottawa that contains an access called Primary. The access has a subscription called Gold:Eng to the service called Gold; the site has a subscription called Gold:Acct to the same service; and the enterprise has two subscriptions, Gold:Eng and Gold:Acct, to the service.
When the IT manager activates the Gold:Eng subscription for the access, the SAE will consider the parameters in the subscriptions Gold:Eng for the access and the enterprise; however, the SAE will not consider the parameters in the subscriptions called Gold:Acct for the site or the enterprise.
The SAE acquires parameters from other sources in the same way whether the subscriber has multiple subscriptions to a service or a single subscription to a service.