Cisco 3-Port OC3c/STM1c ATM Shared Port Adapter - Expansion module - ATM, SONET/SDH - 3 ports - OC-3/STM-1 - refurbished - for P/N: ASR1000-SIP10, ASR1000-SIP10=, ASR1000-SIP10-BUN
- Per-virtual-circuit and per-virtual-path traffic shaping
- IP QoS and layer 3 QoS features
- IP/MPLS-to-ATM QoS mapping
- Any Transport over MPLS (AToM)
- Link fragmentation and interleaving (LFI)
The Cisco ATM SPAs, in conjunction with other SPAs implementing various types of network technologies, allow the user to flexibly build cost-effective routing solutions focusing on point-of-presence (POP) edge, customer premises equipment (CPE), and enterprise applications.
The Cisco ATM SPAs include a comprehensive ATM feature set including per-virtual-circuit and per-virtual-path traffic shaping, ATM service classes including constant bit rate (CBR), variable bit rate non-real time (VBR-nrt), variable bit rate real time (VBR-rt), unspecified bit rate (UBR), Multiprotocol Label Switching (MPLS), QoS, a high-performance segmentation-and-reassembly (SAR) architecture, and support for a large number of ATM virtual connections. All these features are based on industry specifications and standards. In conjunction with the SIPs, the Cisco ATM SPAs continue to deliver new features made possible by industry-leading
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Per-virtual-circuit and per-virtual-path 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 Cisco ATM SPAs support per-virtual-circuit and per-virtual-path shaping, including industry-leading minimum 1-kbps granularity, allowing flexibility and control over every virtual circuit and virtual path configured.
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IP QoS and layer 3 QoS features
The Cisco ATM SPAs support per-virtual-circuit IP QoS features that allow you to apply advanced-queuing and bandwidth-management functions, including Low Latency Queuing (LLQ), to individual virtual circuits to avoid congestion and delay. In addition, extended ACLs and committed access rate (CAR) are supported on a per-virtual-circuit basis on both ingress and egress.
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IP/MPLS-to-ATM QoS mapping
Also supported is IP-to-ATM QoS setting through cell-loss priority (CLP) bit support and virtual circuit bundling, which allows you to divide traffic on different virtual circuits, depending on the desired CoS.
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Any Transport over MPLS (AToM)
MPLS is the primary technology for ATM/IP convergence, and all the Cisco ATM SPAs allow the transport of Layer 2 traffic across an MPLS network. AToM allows a migration path toward the consolidation of IP and ATM networks while protecting existing equipment investment and it accommodates the scaling of existing services using MPLS. All ATM operation, administration, and maintenance (OAM) functions are transported.
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Link fragmentation and interleaving (LFI)
LFI uses the built-in fragmentation capabilities of Multilink Point-to-Point Protocol (MLPPP) to reduce delay and jitter (variations in delay) caused by variable-sized large packets being queued in between relatively small packets. With LFI, packets larger than a configured fragment size are fragmented and encapsulated in an MLPPP header.
