Table Of Contents
Cisco 12000 Series
Eight-Port OC-3c/STM-1c ATM Line Card
The Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card delivers performance and density while providing sophisticated IP quality of service (QoS) functionality and advanced traffic shaping.
Service providers face the challenge of meeting customer demand for high-density wire-speed Internet access via ATM while managing end-to-end QoS. The Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card (8-Port OC-3 ATM) expands the connectivity options for the Cisco 12000 Series Routers so that service providers can attach the routers directly to their existing ATM infrastructure. The 8-Port OC-3 ATM Line Card (Figure 1) supports advanced ATM traffic management features such as per-virtual circuit (VC) and per-virtual path (VP) traffic shaping, per-VC Weighted Random Early Detection (WRED), per-VC Modified Deficit Round Robin (MDRR), including low-latency queueing (LLQ), and non-real-time variable bit rate (nrt-VBR) and unspecified bit rate (UBR) ATM service classes. The segmentation and reassembly (SAR) of IP packets is performed in accordance with RFC 1483, Multiprotocol Encapsulation over ATM Adaptation Layer 5 (AAL5).
Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card
The Cisco 12000 Series ATM line cards enable integration of ATM networks with next-generation IP backbones in numerous ways. The following provides several examples of how the ATM line cards for the Cisco 12000 Series can be used by service providers to build the most competitive IP and Mulitprotocol Label Switching (MPLS) networks.
ATM WAN Connectivity
With the use of the Cisco 12000 Series ATM line cards, service providers can offer Internet connectivity to enterprise customers via an ATM network (Figure 2).
ATM Network for WAN Services
Low-Speed Access Aggregation
Using the Cisco 12000 Series ATM line cards, service providers can provide digital subscriber line (DSL)-based access or dial access services over an IP/MPLS core network (Figure 3).
Low-Speed Access Aggregation
Business DSL Aggregation
Service providers who provide non-session-based (non-Point-to-Point Protocol [PPP]) DSL Internet access for business customers can connect to their Internet backbones via the Cisco 12000 Series ATM line cards (Figure 4).
ATM Network for DSL Aggregation
Key Features and Benefits
•Per-VC and per-VP traffic shaping—Traffic shaping is a function typically provided on ATM edge devices to ensure that bursty traffic conforms to a predetermined "contract." To implement traffic shaping, the 8-Port OC-3 ATM Line Card supports per-VC and per-VP shaping, including unmatched n x 64-kbps granularity, allowing flexibility and control over every VC and VP configured. Traffic shaping is supported on both nrt-VBR and UBR (via peak cellrate [PCR]) ATM service classes.
•IP QoS features—The 8-Port OC-3 ATM Line Card supports per-VC IP QoS features, allowing customers to apply advanced queuing and bandwidth management using WRED and MDRR, including LLQ, to individual VCs to avoid congestion and delay.
•IP-to-ATM QoS mapping—Also supported is setting IP-to-ATM QoS via the cell loss priority (CLP) bit. The VC bundling feature allows customers to divide traffic on different VCs according to the desired class of service (CoS).
•Modular QoS command-line interface (MQC)—For simplicity, QoS features are configurable using Cisco's user-friendly MQC.
The Cisco 12000 Series Router is part of Cisco's family of multimillion packets-per-second (pps) IP and MPLS routing platforms for building profitable networks in today's communications economy. The Cisco 12000 Series is the premier high-end routing platform for service provider backbone and edge applications, enabling service providers to meet the challenge of building packet networks to satisfy services demand while increasing profitability. The Cisco 12000 Series offers the only portfolio of 10 Gbps per slot systems and interfaces (including Packet over SONET [POS], Dynamic Packet Transport/Resilient Packet Ring [DPT/RPR], and Gigabit Ethernet [GbE]), delivering 10G economies of scale anywhere in the network. The Cisco 12000 Series provides the highest reliability, the richest set of service enablers, the lowest total cost of ownership, and the only proven investment protection, including systems that can be upgraded in the field to increase switching capacity. This innovative combination of features and capabilities enables service providers to build the most competitive IP and MPLS networks.
1 Subject to overall system configuration
Description Part number
Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Single Mode Line Card
Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Multimode Line Card
Service and Support
Cisco offers a wide range of service support offerings for its service provider customers. Cisco has earned the highest customer satisfaction ratings in the industry by providing the world-class service and support necessary to deploy, operate, and optimize service provider networks. Whether the goal is speed to market, maximizing network availability, or enhancing customer satisfaction and retention, Cisco is committed to the success of its service providers customers.
For More Information
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For more information about the Cisco 12000 Series and the next generation of routers, visit
http://www.cisco.com/go/12000 or call Cisco.