ISR4351/K9 Overview
Cisco 4351 Integrated Services Router, which supports 3 Network Interface Modules (NIM) slots, delivers 200 Mbps to 400 Mbps aggregate throughput.
Quick Specs
Table 1 shows the Quick Specs of the Cisco ISR4351/K9
| Product Code | Cisco ISR4351/K9 |
| Aggregate Throughput | 200 Mbps to 400 Mbps |
| Total onboard WAN or LAN 10/100/1000 ports | 3 |
| RJ-45-based ports | 3 |
| SFP-based ports | 3 |
| Enhanced service-module (SM-X) slot | 2 |
| NIM (Network Interface Modules) slots | 3 |
| Onboard ISC slot | 1 |
| Memory | 4 GB (default) / 16 GB (maximum) |
| Flash Memory | 4 GB (default) / 16 GB (maximum) |
| Power-supply options | Internal: AC, DC (roadmap), and PoE |
| Rack height | 2 RU |
| Dimensions (H x W x D) | 43.9 x 438.15 x 507.2 mm |
Table 2 shows compare of Cisco 4000 Series Integrated Services Routers
| Technical Specifications | Cisco 4451 | Cisco 4431 | Cisco 4351 | Cisco 4331 | Cisco 4321 | Cisco 4221 |
| Aggregate Throughput | 1 Gbps to 2 Gbps | 500 Mbps to 1 Gbps | 200 Mbps to 400 Mbps | 100 Mbps to 300 Mbps | 50 Mbps to 100 Mbps | 35 Mbps to 75 Mbps |
| Total onboard WAN or LAN 10/100/1000 ports | 4 | 4 | 3 | 3 | 2 | 2 |
| RJ-45-based ports | 4 | 4 | 3 | 2 | 2 | 2 |
| SFP-based ports | 4 | 4 | 3 | 2 | 1 | 1 |
| Enhanced service-module slots | 2 | 0 | 2 | 1 | 0 | 0 |
| Doublewide service-module slots | 1 (assumes no singlewide SM-X modules installed) | 0 | 1 (assumes no singlewide SM-X modules installed) | 0 | 0 | 0 |
| NIM slots | 3 | 3 | 3 | 2 | 2 | 2 |