Service Definitions Overview

A service definition is a high-level, platform-independent template that defines a service that you want to let your subscribers use. You use the JunosE Software’s embedded macro language on your computer to create the macro file that defines the service. You copy and install the macro file on the E Series Broadband Services Routers, and then you can associate the service definition with subscribers to create their service sessions.

Service definitions gives you flexibility by enabling you to use:

• A single service definition to create a service for multiple subscribers.
• Parameterized service definitions to create variations of a service definition.
• Different service definitions to create multiple services for a single subscriber.

A service definition might use the following types of JunosE objects to define the characteristics and capabilities of the service you want to provide:

• Interface profiles—Specify a set of characteristics that can be dynamically assigned to IP interfaces. A service definition must use at least one interface profile.
• Policy lists—Specify policy actions for traffic traversing an interface.
• Classifier lists—Specify the criteria by which the router defines a packet flow.
• Rate-limit profiles—Specify a set of bandwidth attributes and associated actions that limit a classified packet flow or a source interface to a rate that is less than the physical rate of the port.
• QoS parameters—Specify attributes such as shaping rate, shared-shaping rate, assured rate, and scheduler weight for scheduler nodes and queues.
• QoS profiles—Specify queue, drop statistics gathering, and scheduler configuration for an interface hierarchy.