IES Service Overview
Page 662 7750 SR OS Services Guide
IES Service Overview
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’s network. IES allows customer-facing 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 access
point to the subscriber network. Multiple IES services are created to segregate subscriber-owned
IP interfaces.
Figure 1: Internet Enhanced Service
The IES service provides Internet connectivity. Other features include:
• Multiple IES services are created to separate customer-owned 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.
Note: Refer to the 7750 SR OS Triple Play Guide for information about how subscriber group-
interfaces function in the Routed Central Office model.
OSSG023
Subscriber
Network
Internet
ALA-1
SAP
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