Alcatel-Lucent Service Model - Alcatel-Lucent 7705 Service Manual

Alcatel-Lucent Service Model

Alcatel-Lucent Service Model
The 7705 SAR routers are deployed at the provider edge (PE). Services are provisioned on
the 7705 SAR and other network equipment in order to facilitate the transport of
telecommunications data across an IP/MPLS provider's core network. The data is formatted
so that it can be transported in encapsulation tunnels created using generic routing
encapsulation (GRE), IP encapsulation, or MPLS label switched paths (LSPs).
The service model has four main logical components, referred to as (logical) service entities.
The entities are: customers, service types, service access points (SAPs), and service
destination points (SDPs) (see
model, the operator uses the (logical) service entities to construct an end-to-end service. The
service entities are designed to provide a uniform, service-centric model for service
provisioning. This service-centric design implies the following characteristics.
Additional properties can be configured for bandwidth assignments, class of service, and
accounting and billing on the appropriate entity.
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• Many services can be bound to a single customer.
• Many services can be bound to a single tunnel.
• Tunnel configurations are independent of the services they carry.
• Changes are made to a single service entity rather than to multiple ports on multiple
devices. It is easier to change one tunnel rather than several services.
• The operational integrity of a service entity (such as a service tunnel or service
endpoint) can be verified by one operation rather than through the verification of
dozens of parameters, thereby simplifying management operations, network
scalability, and performance.
• A failure in the network core can be correlated to specific subscribers and services.
• QoS policies, accounting policies, and IP filter policies (Epipes, Ipipes, IES and
VPRN services, and IES Management SAPs) are applied to each service.
Service Entities on page
7705 SAR OS Services Guide
41). In accordance with the service