The Cisco ASR 1000 Series SPA Interface Processor (SIP), based on the Cisco I-Flex design, combines shared port adapters (SPAs) and SPA interface processors (SIPs), taking advantage of an extensible design that facilitates service prioritization for voice, video, and data (triple-play) 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.
Quality of Service (QoS)
Provides ingress and egress buffering and the ability to classify traffic based on Layer 2 or Layer 3 header information for oversubscription management.
Clocking distribution
Provides Stratum-3 clock reference and recovers line clock for distribution to SPAs.
Online Insertion and Removal (OIR)
Increases availability and provides operational ease of use.
Software high availability
Provides ability to upgrade and downgrade individual SPA drivers without operationally affecting other SPAs within the same SIP or same chassis.
Modularity
Allows reuse of SPAs across the Cisco router portfolios and provides high-density aggregation, with a combination of interface types and the capability to invest as business needs grow.
