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C3900-SPE250/K9
Cisco Services Performance Engine 250 for Cisco 3945E ISR
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Overview of C3900-SPE250/K9
C3900-SPE250/K9 is a modular enterprise router engineered with a scalable architecture that supports integrated services such as voice, video, and WAN optimization. Designed for mission‐critical environments, this router offers multiple power options—including standard AC with redundant capabilities—and delivers both dual WAN and dedicated LAN interfaces that ensure reliable connectivity and flexible network configurations.
The router incorporates advanced VPN features including IPSec, DMVPN, and FlexVPN, paired with built-in security functionalities and QoS for optimal performance. With high throughput (up to 0.25 Gbps), modular expansion slots for additional interfaces, and comprehensive routing protocol support, the C3900-SPE250/K9 is ideally suited for enterprise branch offices, remote connectivity, and other high-demand use cases.
C3900-SPE250/K9 price is $6,279.00, a 58% saving from the Cisco list price of $14,950.00. C3900-SPE250/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C3900-SPE250/K9 for additional pricing. Browse the full Router Isr 3900 series or explore all Cisco products.
In a distributed enterprise with dozens of branch offices, the C3900-SPE250/K9 installed on a Cisco 3945E ISR dramatically offloads 256-bit AES IPSec encryption and decryption at line rate. This hardware-accelerated VPN engine delivers up to 4 Gbps of encrypted throughput, reduces router CPU utilization by 75%, and ensures sub-5 ms latency for mission-critical applications, guaranteeing secure, high-performance connectivity under peak loads.
For global organizations running real-time voice and video over WAN, deploying the C3900-SPE250/K9 on a Cisco 3945E ISR provides dedicated hardware for SIP and H.323 packet processing. This offload capability enables up to 500 simultaneous HD video streams, enforces end-to-end QoS policies, and reduces jitter by 60%, resulting in crystal-clear calls, consistent frame rates, and higher user satisfaction without overtaxing the main router CPU.
Retail and hospitality networks hosting point-of-sale, IoT telemetry, and guest Wi-Fi can leverage the C3900-SPE250/K9 on a Cisco 3945E ISR for real-time deep packet inspection and application classification. By accelerating Cisco AVC and NBAR2 workloads in hardware, organizations achieve granular traffic segmentation, guarantee 99.99% transaction throughput for POS systems, and automatically throttle non-critical flows—optimizing bandwidth and maintaining PCI compliance without additional appliances.
To get the detailed certification, please go to the Compliance Center.
 C3900-SPE250/K9 |  CISCO3945/K9 |  C3945E-CME-SRST/K9 |  C3925E-VSEC/K9 |  CISCO3925-HSEC+/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Modular | Modular | Modular |
| Broadband | N/A | N/A | N/A | DSL / Fiber (Optional) | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC, CE | FCC / CE | FCC, CE | FCC / CE / RoHS |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | N/A | 16.14 inches | 20.3 inches | 20 inches | 17.28 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | FCC Part 15 | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100 |
| Expansion Slots | EHWIC | EHWIC / NIM | NIM | NIM / EHWIC | NIM / EHWIC |
| Features | VPN / IPv6 Compatible / Firewall / POE / MPLS | VPN, Voice, Video, IPv6 Compatible, Firewall, MPLS | VPN / Firewall / IPv6 Compatible / Voice | VPN / Firewall / Intrusion Prevention / IPv6 Compatible / Voice / POE | VPN / IPv6 Compatible / Firewall / Voice / Video |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | N/A | 4.45 inches | 4.5 inches | 1.73 inches | 1.73 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Security / Data | Voice / Video / WAN Optimization |
| 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 | Modular LAN | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 1 GB | 512 MB | 512 MB | 256 MB | 512 MB |
| Modular Slots Available | 3+ Slots | 3+ Slots | 3+ Slots | 2 Slots | 3+ Slots |
| Network Protocols | IPv4 / IPv6 | IP, IPv6, TCP/IP, UDP, OSPF, BGP, EIGRP, RIP | IPv4 / IPv6 | IPv4, IPv6 | IPv4, IPv6 |
| Power | 250 W | 350 W | 255 Watt | 275 Watts | 290 W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply with Redundant Options | AC Power Supply / Redundant |
| Product Name | C3900-SPE250/K9 | Cisco 3945 Integrated Services Router (ISR) | Cisco 3945E Integrated Services Router with CME and SRST | Cisco C3925E-VSEC/K9 Integrated Services Router | CISCO3925-HSEC+/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / SNMP / NetConf | Telnet/SSH/SNMP | SSH / Telnet / SNMP | SSH / Telnet / SNMP | Telnet / SSH |
| Routing Protocols | OSPF / BGP / EIGRP / MPLS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | UL / cUL | N/A | UL Certified | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.25 Gbps | 75 Mbps | 0.3 Gbps | 450 Mbps | 50 Mbps |
| Use Case | Enterprise | Enterprise / Business | Enterprise / Business | Enterprise / Business | Enterprise |
| VPN Support | IPSec / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / DMVPN / FlexVPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | Modular WAN | 2 WAN | 2 WAN |
| Weight | N/A | 29 lbs | 16.5 lbs | 30 lbs | 15 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | 17.65 inches | 17.5 inches | 17.2 inches | 17.28 inches |
| Wireless Support | No | No | No | No | No |
SPE250 significantly boosts 3945E performance. Handles voice, UC, and data workloads efficiently with predictable uptime.
Reliable and easy to install. Enhances router throughput and network stability.
Durable performance engine. Ensures smooth UC and data operations for medium branch offices.
High-performing Cisco solution. Handles heavy workloads efficiently while maintaining predictable network performance.
Efficient and robust. SPE250 optimizes 3945E capabilities for voice, UC, and data applications.
The Cisco Services Performance Engine 250 (SPE250) is a high-performance hardware module that upgrades the processing power and feature capacity of the Cisco 3945E Integrated Services Router.
The SPE250 delivers up to 250 Mbps of aggregate throughput, accelerated security and voice services, and improved performance for advanced network functions such as VPN, firewall, and QoS.
The SPE250 is compatible exclusively with the Cisco 3945E ISR chassis and is not supported on earlier or other ISR models.
To install the SPE250, power down the 3945E ISR, insert the module into the designated Performance Engine slot, secure it with the retaining screws, and power the router back on.