Description
Product Overview
The Cisco ISR4331/K9 is a high-performance, modular router designed to deliver intelligent WAN capabilities to enterprise branch offices. As part of the Cisco 4000 Series Integrated Services Routers (ISRs), it offers a converged infrastructure that integrates routing, security, and application services. The ISR4331 features a multicore CPU architecture with a dedicated services plane, allowing it to run multiple concurrent services—such as encryption, traffic management, and WAN optimization—without compromising data throughput. With 5 units currently in stock, this router is available for immediate dispatch to upgrade your network infrastructure.
Key Capabilities
- Intelligent WAN (IWAN) Optimization: Dynamically routes traffic across the best link based on real-time application and network conditions to ensure optimal performance.
- Modular Scalability: Equipped with 2 Network Interface Module (NIM) slots and 1 Enhanced Service Module (SM-X) slot, allowing for flexible interface expansions as business needs grow.
- Advanced Security: Supports robust security features including Zone-based firewalls, IPsec VPN, and intrusion prevention via Cisco IOS XE Security licenses.
- Pay-as-You-Grow Licensing: Performance-on-demand licensing allows you to increase aggregate throughput from 100 Mbps to 300 Mbps via a simple software upgrade without hardware changes.
- Converged Branch Infrastructure: Consolidates network, compute, and storage resources, reducing the need for multiple devices at the branch edge.
Technical Specifications
| Specification | Details |
|---|---|
| Aggregate Throughput | 100 Mbps to 300 Mbps |
| Default Memory (DRAM) | 4 GB DDR3 ECC (Combined) |
| Max Memory (DRAM) | 16 GB DDR3 ECC |
| Default Flash | 4 GB |
| Max Flash | 16 GB |
| NIM Slots | 2 |
| SM-X Slots | 1 |
| Onboard GE Ports | 3 (2 RJ-45, 2 SFP) |
| ISC Slot | 1 (for PVDM4) |
| Power Supply | Internal AC, DC (roadmap), and PoE options |
| Max Power (No PoE) | 250W |
| Dimensions (H x W x D) | 1.75 x 17.25 x 17.25 in (4.45 x 43.8 x 43.8 cm) |
| Weight | 13.5 lb (6.2 kg) with AC PS |
Ordering Information
| Product Number | Description |
|---|---|
| ISR4331/K9 | Cisco 4331 ISR (Base): 3 onboard GE, 2 NIM slots, 1 ISC slot, 1 SM slot, 4 GB Flash, 4 GB DRAM |
| FL-4330-PERF-K9 | Performance-on-Demand License: Increases performance from 100 Mbps to 300 Mbps |
| SL-4330-SEC-K9 | Security License (SEC) |
| SL-4330-APPX-K9 | Application Experience License (APPX) |
Comparison & Compatibility
The Cisco ISR4331 sits in the middle of the 4000 Series, offering a balance between performance and expandability.
| Feature | ISR4321 | ISR4331 | ISR4351 | ISR4431 |
|---|---|---|---|---|
| Aggregate Throughput | 50 – 100 Mbps | 100 – 300 Mbps | 200 – 400 Mbps | 500 Mbps – 1 Gbps |
| NIM Slots | 2 | 2 | 3 | 3 |
| SM-X Slots | 0 | 1 | 2 | 0 |
| Onboard GE Ports | 2 | 3 | 3 | 4 |
| Form Factor | 1RU | 1RU | 2RU | 1RU |
Q&A
Q: What is the difference between the ISR4331 and the ISR4321
A: The ISR4331 offers higher throughput (up to 300 Mbps vs 100 Mbps) and includes an SM-X slot for enhanced service modules, whereas the ISR4321 does not have an SM-X slot.
Q: Can I upgrade the throughput of the ISR4331/K9 without buying new hardware
A: Yes, the ISR4331 supports a Performance-on-Demand license (FL-4330-PERF-K9) that upgrades the throughput from 100 Mbps to 300 Mbps via software.
Q: What type of memory upgrades are supported
A: The ISR4331 supports DRAM upgrades up to 16 GB and Flash memory upgrades up to 16 GB.
Q: Does this router support Power over Ethernet (PoE)
A: Yes, with the optional internal PoE power supply, the ISR4331 can deliver PoE+ to connected devices.
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