The Cisco A900-RSP3C-400-W Route Switch Processor is a high-performance control and switching engine designed for the Cisco ASR 907 Router, delivering up to 400 Gbps switching capacity for carrier-grade networking. Engineered to support high-speed interfaces including 10G, 40G, and 100G Ethernet, this processor enables scalable Layer 2 and Layer 3 services for service providers and large enterprise networks.
Built with an integrated control and data plane architecture, the A900-RSP3C-400-W ensures efficient packet processing, advanced MPLS services, and hardware-accelerated QoS. Its redundant RSP capability with sub-50 ms failover guarantees high availability and uninterrupted service delivery for mission-critical deployments.
This wide-temperature (“W”) variant is designed for harsh environments, operating reliably from -40°C to 70°C, making it ideal for outdoor cabinets, utility networks, and mobile cell sites. Integrated GNSS timing, IEEE 1588v2 (PTP), and SyncE support provide precise synchronization required for 5G mobile backhaul and time-sensitive networks.
Running on Cisco IOS-XE, the processor supports advanced features such as MPLS, Segment Routing, VPLS, and hierarchical QoS, while offering simplified management through dedicated console and management interfaces.
Product Specifications – Cisco A900-RSP3C-400-W Route Switch Processor
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| Specification Category |
Details |
| Manufacturer |
Cisco Systems |
| Part Number |
A900-RSP3C-400-W |
| Product Type |
Route Switch Processor (RSP) |
| Designed For |
Cisco ASR 907 Router |
| Function |
Central control plane & switching fabric processor |
| Switching Capacity |
400 Gbps |
| Architecture |
Integrated control plane & data plane |
| Operating System |
Cisco IOS-XE |
| Memory (DRAM) |
16 GB |
| Flash Memory |
16 GB |
| Management Ports |
1 × RJ-45 Console
1 × USB Console
1 × 10/100/1000 Mbps Management Ethernet |
| Timing & Synchronization |
Integrated GNSS (GPS) receiverIEEE 1588v2 Precision Time Protocol (PTP)Synchronous Ethernet (SyncE) support |
| High Availability |
Supports redundant RSP configurationSub-50 ms failover for carrier-grade resiliency |
| Interface Scalability |
Enables support for 10G, 40G, and 100G Ethernet modules |
| Service Support |
MPLS, Segment Routing, VPLS, L2VPN, L3VPN, H-QoS |
| Quality of Service |
Hierarchical QoS (H-QoS) with hardware acceleration |
| Deployment Environment |
Wide-temperature hardened design |
| Operating Temperature |
-40°C to 70°C (-40°F to 158°F) |
| Environmental Suitability |
Ideal for outdoor cabinets, mobile cell sites, and utility enclosures |
| Synchronization Use Cases |
4G/5G mobile backhaul, utility timing networks, time-sensitive services |
| Resiliency Features |
Carrier-grade uptime, redundant controllers, fast switchover |
| Compliance & Design |
Industrial-grade, telecom-ready architecture |
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FAQs:
Q1. Is the RSP3C-400-W compatible with the ASR 903 chassis?
No. While the ASR 900 series shares some components, the RSP3C-400-W is specifically sized and keyed for the ASR 907. The ASR 903 typically uses the RSP2 or RSP3C-200 controllers.
Q2. Does this module include the GNSS/GPS antenna?
The RSP has the integrated receiver and an external SMA connector, but the GPS antenna and cabling are typically sold separately based on your installation requirements (e.g., active vs. passive antennas).
Q3. How does the 400G throughput work in a redundant setup?
In a redundant configuration (two RSPs), the controllers operate in a Active/Standby mode for the control plane. However, depending on the software version, the data plane can provide high-availability pathing to the interface modules.
Q4. Does it support Segment Routing (SR)?
Yes. This RSP is optimized for modern service provider architectures and supports Segment Routing (SR) and SRv6, providing a simplified and more scalable alternative to traditional MPLS.
Q5. Can I mix this RSP with a 200G RSP in the same chassis?
Cisco does not recommend mixing different RSP models (e.g., RSP3C-400 and RSP3C-200) in a production environment for redundancy. Both RSPs should be identical to ensure consistent performance and stable failover.
