Cisco 10000 Series Application Guide
General Overview of Broadband Remote Access Server
The Cisco 10000 Series provides aggregation and connectivity services between the service provider’s access network and the core IP network (Figure 1).
Figure 1
Service Provider Network Architecture
ATM Network
| | Cisco | IP Network |
| DSL | 10000 |
Subscriber | DSLAM | Series | |
| | |
| Access | Edge | Core |
The access network consists of two main elements: DSL connections between the central office and customer premises, and an ATM network connecting central offices to the service provider points of presence (POPs). The access network is responsible for delivering subscriber connections in bulk to the service provider’s IP edge.
The core network usually consists of high-speed routers meshed together with high-speed optical circuits, providing connectivity between regional POPs and peering points for Internet access.
The Cisco 10000 Series performs a pivotal role in the aggregation and termination of access technologies, authentication services, and the switching and routing of IP packets to and from the core.
Baseline Attributes for the Cisco 10000 Series Broadband Remote Access Aggregator
ATM services—A full spectrum of ATM interfaces is available from DS3/E3 copper through to OC-12/STM-4 high-speed optical. Interface choice is coupled with industry-leading densities and the highest scalability of virtual circuits. The Cisco 10000 Series offers several ATM service classes, including unspecified bit rate (UBR); UBR+; variable bit rate, non-real time (VBR-nrt); and constant bit rate (CBR) with scalable, accurate shaping at both the virtual circuit and virtual path layers.
Scalable provisioning services—Industry-leading authentication, authorization, and accounting (AAA) and Remote Authentication Dial-In User Services (RADIUS) provisioning of bulk configurations with the “Virtual Circuit Range” application. Zero-touch provisioning of virtual circuits with the “Auto-Configure” application.
Widest range of high-touchservices—Using the Cisco 10000 Series Parallel Express Forwarding (PXF) adaptive architecture, many per-virtual circuit services are available with zero effect on system performance or scalability. From per-virtual circuit access control lists (ACLs) through IP multicast to extensive IP quality of service (QoS), the Cisco 10000 Series continues to lead the industry with high-value embedded services.
High availability—The Cisco 10000 Series has set the standard with high-availability features for the edge leased-line aggregation space. Much of the same technology and applications are used for broadband, enabling service providers to confidently scale subscriber sessions and performance attributes without the fear of prolonged network outages. As the concentration of subscriber aggregation on the Cisco 10000 Series increases, the requirement for advanced high-availability features becomes greater.
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