The Cisco® I-Flex design combines shared port adapters (SPAs) and SPA interface processors (SIPs), leveraging an extensible design that enables service prioritization for voice, video and data services. Enterprise and service provider customers can take advantage of improved slot economics resulting from modular port adapters that are interchangeable across Cisco routing platforms. The I-Flex design maximizes connectivity options and offers superior service intelligence through programmable interface processors that deliver line-rate performance. I-Flex enhances speed-to-service revenue and provides a rich set of QoS features for premium service delivery while effectively reducing the overall cost of ownership. This data sheet contains the specifications for the Cisco XR 12000 and 12000 Series SPA Interface Processor-600 (Cisco XR 12000/12000 SIP-600; refer to Figure 1).
Figure 1. Cisco XR 12000/12000 Series SIP-600 with Gigabit Ethernet SPAs
• A common 10-Gpbs forwarding and queuing engine responsible for packet classification, forwarding, queuing, and accounting without compromising the performance. The Cisco XR 12000/12000 SIP-600 has two forwarding engines, one for ingress and one for egress. This allows the user to implement different features and QoS policies at the incoming traffic independently from the features and the QoS policies applied at the egress interfaces. The multicast replication is done by the egress forwarding engine, hence a very scalable multicast with built-in QoS.
• A modular physical layer interface module (PLIM) front end that hosts up to two SPAs. Each SPA has a dedicated 10 Gbps to the SPA controller. A fair bandwidth allocation algorithm shares available and excess bandwidth between the SPAs (the oversubscribed SPA does not cause any packet drop on the nonoversubscribed SPA, and any unused bandwidth from one SPA is used by the other SPA).
The Cisco XR 12000/12000 SIP-600 supports any combination of the following pluggable SPAs and Layer 2 encapsulations: concatenated OC-192 and OC-48; Gigabit Ethernet and 10 Gigabit Ethernet interfaces; Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC), and Frame Relay; Dynamic Packet Transport (DPT), Resilient Packet Ring (RPR), and 802.17; and VLANs.
• A SPA controller that is responsible for adapting the user traffic flowing between the SPA interfaces and the Layer 3 forwarding engine. The SPA controller can handle up 256 physical ports, and has enough buffers to absorb up to 6 msec of 20-Gbps traffic burst without packet drops. The SPA controller has two levels of priority queuing with Deficit Round Robin (DRR) and strict priority servicing. The strict priority is designed to protect higher-priority traffic by first dropping lower-priority packets in an oversubscribed configuration (persistent incoming traffic rate of 20 Gbps).
KEY FEATURES AND BENEFITS
• Dynamic allocation of 4096 input-shaped queues to any interface (or subinterface), Frame Relay connection, or VLAN
• Ingress queuing: 2048 unicast Modified DRR (MDRR) queues, 16 high-priority queues, 8 multicast queues, and 2 fabric priority queues
• Egress queuing: 8192 MDRR queues dynamically shared across 4096 interfaces; hierarchical shaping (interface, queue)
• High number of IPv4, IPv6, Multiprotocol Label Switching (MPLS), and MPLS VPN unicast and multicast routes: up to 1M IPv4/MPLS or 512,000 IPv6 route entries
• Per-VLAN/source-destination MAC address filtering, trunking, accounting, QoS, match VLAN QoS, Hot Standby Router Protocol (HSRP)/Virtual Router Redundancy Protocol (VRRP) hierarchical rate limiting and policing, dynamic queuing, and traffic shaping
• Input and output full NetFlow Version 8 in hardware
• Input and output Sampled NetFlow, Versions 5, 8, and 9 in hardware
• Building Integrated Timing Supply (BITS)
• Online insertion and removal (OIR) of SPAs; OIR of one SPA does not affect the traffic on other SPA interfaces
• Multirouter automatic protection switching (MR-APS)
• Layer 3 VPNs over MPLS (RFC2547) and over IP (MPLS-VPNs over IP)
• Layer 2 VPNs over MPLS (Any Transport over MPLS [AToM]) and over IP Layer 2 Tunneling Protocol Version 3 (L2TPv3)
Table 1. Product Specifications
Table 2. Ordering Information
Product Part Number
Cisco XR 12000/12000 Series SPA Interface Processor-600
Cisco XR 12000/12000 Series SPA Interface Processor-600, spare
Table 3. Supported SPAs
SERVICE AND SUPPORT
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