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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 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).
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.