Cisco ISR 4221 Router ISR4221/K9
ISR4221/K9Cisco ISR 4221 Router ISR4221/K9
ISR4221/K9 Overview
The Cisco ISR 4221 is part of the Cisco 4000 Series Integrated Services Routers (ISR 4000 Family), designed for small to medium branch offices that require secure, high-performance connectivity and integrated services.
ISR4221/K9 Specification
| Parameter | Specification / Value |
|---|---|
| Model Number | Cisco ISR4221/K9 |
| Product Type | Integrated Services Router |
| Performance / Throughput | 35 Mbps (default), upgradable to 75 Mbps with Performance License |
| Architecture | Cisco Unified Computing System (UCS) based multi-core CPU architecture |
| Form Factor | 1 Rack Unit (1U) |
| LAN/WAN Ports | 2 × Integrated 10/100/1000 Mbps RJ-45 Ethernet ports (RJ-45/SFP combo) |
| Network Interface Module (NIM) Slots | 2 |
| Service Module (SM-X) Slots | 1 Internal (shared for future expansion) |
| Integrated Services Card (ISC) Slot | 1 |
| USB Ports | 1 × USB Type A (for storage), 1 × mini-USB console port |
| Console / Auxiliary Ports | 1 × RJ-45 console port, 1 × RJ-45 auxiliary port |
| Default DRAM | 4 GB |
| Maximum DRAM | 8 GB |
| Default Flash Memory | 4 GB |
| Maximum Flash Memory | 8 GB |
| Power Supply | Internal AC power supply (optional DC power version) |
| Maximum Power Consumption | Approximately 45 W (without PoE modules) |
| PoE Capability | Optional via PoE NIM modules |
| Rack Mountable | Yes (1U standard rack mount kit included) |
| Dimensions (H × W × D) | 44.45 × 369.57 × 294.64 mm (1.75 × 14.55 × 11.6 inches) |
| Weight | Approximately 4.5 kg (10 lbs) |
| Operating Temperature | 0 °C to 40 °C |
| Storage Temperature | -40 °C to 70 °C |
| Humidity Range | 5% – 85% (non-condensing) |
| Forwarding Capacity | Up to 50,000 packets per second (approximate) |
| Routing Protocols Supported | Static, RIP, OSPF, EIGRP, BGP, VRRP, Policy-Based Routing |
| Security Features | Zone-Based Firewall, IPsec VPN, SSL VPN, Secure Boot, Control Plane Protection |
| WAN Optimization Support | Cisco WAAS Express (optional) |
| Voice / Collaboration Support | SIP, SRST, DSP modules supported via add-ons |
| Virtualization Capabilities | Supports Cisco NFVIS and virtualized network functions (VNFs) |
| High Availability | Redundant Power Supply (RPS) supported |
| Management Interfaces | CLI (console/SSH), Web UI, SNMP v1/v2/v3, NetFlow, RESTCONF |
| Licensing Model | Feature-based (Security, Performance, Unified Communications, AppX, etc.) |
| Target Use Case | Secure WAN connectivity for branch offices, cloud access, and unified communications integration |
ISR4221/K9 Warranty
 | Low Price Guarantee |  | Quality Assurance |
 | Free CCIE Expert Technical Support |  | Commodity Refund Guarantee |
 | Diversified and Flexible Transportation Services |  | Standard Policy |
