Internet Enhanced Service (IES) is a routed connectivity service where the subscriber communicates with an IP router interface to send and receive Internet traffic. An IES has one or more logical IP routing interfaces each with a SAP which acts as the access point to the subscriber network.
IES allows IP interfaces to participate in the same routing instance used for service network core routing connectivity. IES services require that the IP addressing scheme used by the subscriber be unique between other provider addressing schemes and potentially the entire Internet. While IES is part of the routing domain, the usable IP address space may be limited. This allows a portion of the service provider address space to be reserved for service IP provisioning, and be administered by a separate, but subordinate address authority.
IP interfaces defined within the context of an IES service must have a SAP associated as the uplink access point to the subscriber network. Multiple IES services are created to segregate subscriber owned IP interfaces.
The following figure shows Internet enhanced service.
The IES service provides in-band management connectivity. Other features include:
Multiple IES services are created to separate IP interfaces.
More than one IES service can be created for a single customer ID.
More than one IP interface can be created within a single IES service ID. All IP interfaces created within an IES service ID belong to the same customer.