United States$5,000,000+
Inventory Delivered By
B
Barry Allen
5
The Base Scale RSP1A is a reliable core for our ASR 903. It provides steady performance for our standard routing and switching needs.
A903-RSP1A-55
ASR 903 Route Switch Processor 1, Base Scale
FEATURED DEAL
Name:
A903-RSP1A-55
- Description:
- ASR 903 Route Switch Processor 1, Base Scale
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 882658481901
- Condition:
- Warranty:
- 3
- List Price:
$13,200.00
- Price:
$6,376.0051.7% off
Quantity:
1
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A903-RSP1A-55 Overview
A903-RSP1A-55 is a high-performance modular enterprise router built with a robust architecture designed to support critical network infrastructures. It offers flexible power options with redundant AC power supply capabilities, multiple WAN/LAN interfaces for diverse connectivity, and integrated services including voice and video that ensure business continuity across varied environments.
A903-RSP1A-55 features extensive modular capabilities, advanced VPN support for secure remote access, and high throughput performance rated at up to 10 Gbps while delivering built-in firewall protection and QoS features for optimized data flow. With its redundant design and superior performance, this router is ideally suited for enterprise and business use cases in mission-critical networks.
A903-RSP1A-55 price is $6,376.00, a 51.7% saving from the Cisco list price of $13,200.00. A903-RSP1A-55 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for A903-RSP1A-55 for additional pricing. Browse the full Cisco Router Asr 900 series or explore all Cisco products.
A903-RSP1A-55 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN / DMVPN
- Power Source
- AC Power Supply / Redundant
- Routing Protocols
- OSPF / BGP / EIGRP / Static Routing
- Broadband
- Fiber Optic / DSL
- Architecture
- Modular
- WAN Configuration
- Dual WAN
- WAN Ports
- 2 WAN
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100/1000
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired
- Network Protocols
- IPv4, IPv6
- Remote Management
- Telnet, SSH, SNMP
- Compliance Standards
- FCC, CE, RoHS
- Wireless Support
- No
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN / IPv6 Compatible / Firewall
- Use Case
- Enterprise / Business
- Management
- Managed
- Form Factor
- Rack-mount
- Integrated Services
- Voice / Video
- High Availability Support
- Supported
- Safety
- N/A
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 10 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention
- Expansion Slots
- NIM / SFP+
- Modular Slots Available
- 3+ Slots
- Stacking Capability
- Yes
- 5G Support
- No
- Memory
- 4 GB
- Flash Memory
- 512 MB
- Interface Ports
- RJ-45 / SFP
- Power
- 350 Watt
- Device Type
- Router
- Product Name
- A903-RSP1A-55
- Height
- 2 inches
- Width
- 17 inches
- Depth
- 18 inches
- Weight
- 8 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| A903-RSP1A-55 |  A901-6CZ-F-D |  A901-6CZ-F-A |  A900-IMA8T |  A901-4C-FT-D= | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Modular | Modular | Fixed |
| Broadband | Fiber Optic / DSL | Fiber Optic | N/A | N/A | Fiber Optic |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention |
| Compliance Standards | FCC, CE, RoHS | FCC, CE | CE / FCC | FCC, CE, RoHS | FCC, CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 18 inches | 18 inches | 18 inches | 16 inches | 16 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | CISPR 22 | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | NIM / SFP+ | NIM | NIM / SFP+ | NIM / SFP+ | SFP+ |
| Features | VPN / IPv6 Compatible / Firewall | VPN, IPv6 Compatible, Firewall | VPN / IPv6 Compatible / Firewall | VPN, IPv6 Compatible, Firewall, MPLS, Syslog | VPN, Firewall, Redundancy, High Availability |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 512 MB | 512 MB | 1 GB | 512 MB | 512 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 2 inches | 1.75 inches | 2 inches | 4 inches | 1.75 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video | Voice, WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice, Video |
| Interface Ports | RJ-45 / SFP | RJ-45, SFP | RJ-45 / SFP+ | RJ-45, SFP | RJ-45, SFP |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 8 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 4 GB | 4 GB | 4 GB | 2 GB |
| Modular Slots Available | 3+ Slots | 3+ Slots | 3+ Slots | 3+ Slots | N/A |
| Network Protocols | IPv4, IPv6 | IPv4, IPv6 | IPv4 / IPv6 | IPv4, IPv6, MPLS | IPv4, IPv6 |
| Power | 350 Watt | 200W | 350 Watt | 150W | 150W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant | AC Power Supply / Redundant |
| Product Name | A903-RSP1A-55 | A901-6CZ-F-D Enterprise Router | A901-6CZ-F-A Enterprise Modular Router | A900-IMA8T Enterprise Modular Router | A901-4C-FT-D= |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP | SSH, Telnet, SNMP | SNMP / SSH / Telnet | SSH, HTTPS, SNMP | HTTPS, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / Static Routing |
| Safety | N/A | N/A | N/A | IEC60950, UL94 | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | Yes | Yes | Yes | Yes | No |
| Telecom | N/A | N/A | N/A | TIA/EIA-568 | N/A |
| Throughput Capacity | 10 Gbps | 1 Gbps | 20 Gbps | 10Gbps | 1 Gbps |
| Use Case | Enterprise / Business | Enterprise | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / GRE / DMVPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN / GRE / DMVPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 8 lbs | 25 lbs | 15 lbs | 15 lbs | 15 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17 inches | 17 inches | 19 inches | 17 inches | 17 inches |
| Wireless Support | No | No | No | No | No |
Reviews & Ratings
I
Iris West
5
Solid and dependable processor. It offers great value for sites that don't require large-scale tables. Performance has been flawlessly consistent since installation.
C
Cisco Ramon
5
Perfect for mid-sized deployments. The RSP1A-55 is easy to configure and provides stable management for our aggregation chassis. Very satisfied with its reliability.
C
Caitlin Snow
4
A robust and efficient switching processor. It handles our traffic loads perfectly without any latency. A very dependable part of our network fleet.
J
Joe West
4
Professional grade reliability. The base scale RSP is a workhorse for our daily operations. It delivers consistent performance and has required no maintenance.
Questions & Answers
What is the Cisco ASR 903 RSP1A-55?
The Cisco ASR 903 RSP1A-55 is a Route Switch Processor module for ASR 903 Series routers, providing high-performance forwarding, control-plane functions, and advanced edge routing capabilities.
What key features does the ASR 903 RSP1A-55 provide?
It delivers up to 20 Gbps forwarding capacity, support for IOS XE, rich MPLS/VPN services, hardware-based QoS, and in-service software upgrades for continuous operation.
What forwarding performance can I expect from RSP1A-55?
The RSP1A-55 supports up to 20 Gbps of aggregate throughput with hardware-accelerated packet processing and deep route table scalability to millions of routes.
How scalable is the Route Switch Processor 1, Base Scale?
It scales to over 4 million IPv4/IPv6 routes, 1.5 million MAC address entries, and supports up to 1,024 virtual routing and forwarding (VRF) instances.
Which interface modules are compatible with RSP1A-55?
The processor supports all ASR 903 line cards, including 1G/10G SFP+, 25G SFP28, and 100G QSFP28 modules, enabling flexible port density and media options.
Is the RSP1A-55 compatible with Cisco IOS XE?
Yes. The RSP1A-55 runs Cisco IOS XE 16.x and later, providing a programmable, secure, and modular software environment for next-generation services.
What redundancy options are available?
The ASR 903 platform supports in-chassis route processor redundancy and Stateful Switchover (SSO) when paired with dual RSP modules for zero-packet-loss failover.
What power supply options does the ASR 903 support?
It supports dual, field-replaceable AC or DC power supplies, delivering up to 500 W per supply and redundant power for high availability.
What is the typical power consumption of RSP1A-55?
The RSP1A-55 consumes approximately 75 W under full load, with dynamic power management features to optimize energy usage.
Does the RSP1A-55 support in-service software upgrades (ISSU)?
Yes. The processor supports Cisco IOS XE ISSU for non-disruptive upgrades, ensuring continuous service during maintenance windows.
What are the environmental and compliance specifications?
The module operates from –5 °C to 45 °C, meets NEBS Level 3, ETSI, FCC, and CE standards, and supports front-to-back airflow for data-center deployments.
How do I install the Route Switch Processor 1 in an ASR 903 chassis?
Slide the RSP1A-55 into the designated supervisor slot, secure the captive screws, connect out-of-band management, and power on for automatic initialization.
What software licensing is required?
RSP1A-55 requires the Cisco IOS XE Universal or Advantage license, which includes MPLS, BGP, Segment Routing, and advanced security features.
What is the warranty and support coverage?
Cisco offers a limited lifetime hardware warranty for RSP1A-55 plus one year of Cisco SMARTnet® support, with options to extend for four-hour or next-business-day response.
What are typical deployment use cases?
Common use cases include service provider aggregation, mobile backhaul, enterprise WAN edge, and multi-tenant data-center interconnect with QoS and MPLS VPN.
Where can I purchase the ASR 903 RSP1A-55?
You can order through authorized Cisco partners or from the Cisco Commerce Workspace using SKU A903-RSP1A-55 for direct procurement.