The Cisco A900-RSP2A-128 Route Switch Processor is a high-performance processing module designed for compatible Cisco ASR 900 Series Aggregation Services Routers. Engineered for carrier-grade routing, switching, and control plane operations, it provides the scalability and reliability required for service provider aggregation, Carrier Ethernet, Metro Ethernet, and enterprise WAN environments.

Featuring 128G Base Scale support and 4 GB of DRAM, the A900-RSP2A-128 enables efficient processing of demanding network services and growing traffic requirements. Its scalable architecture supports high-capacity aggregation networks while providing centralized system control and reliable route processing for compatible Cisco ASR 900 platforms.

Optimized for Cisco IOS XE, the Route Switch Processor supports advanced networking capabilities including Layer 2 and Layer 3 services, IPv4, IPv6, MPLS, QoS, and enterprise routing protocols such as BGP, OSPF, and IS-IS, depending on the host platform and software configuration. These capabilities make it suitable for complex service provider and enterprise network infrastructures.

The Cisco A900-RSP2A-128 is designed for high-availability deployments, supporting redundant Route Switch Processor configurations on compatible dual-RSP ASR 900 platforms. This redundancy helps maintain continuous network operations and minimizes service disruption in mission-critical environments.

Its modular plug-in design simplifies network expansion, maintenance, and infrastructure upgrades. Support for platform-dependent Online Insertion and Removal (OIR) further enhances operational flexibility and serviceability.

Ideal for Carrier Ethernet networks, service provider aggregation, Metro Ethernet deployments, enterprise WAN infrastructure, high-availability routing, and network expansion projects, the Cisco A900-RSP2A-128 Route Switch Processor with 128G Base Scale delivers scalable performance, carrier-grade reliability, and advanced routing capabilities for Cisco ASR 900 Series environments.