The Cisco ISR4451-X/K9 stands out as a powerhouse in routing technology. With its 1 to 2 Gbps throughput, network traffic flows efficiently, making it an ideal solution for businesses requiring high-speed data transfer. The device is not only powerful but also versatile, providing a range of connectivity options including four 10/100/1000 Ethernet ports and various NIM and SM-X module slots for network expansion.
Furthermore, management is simplified with its distinct data plane and services plane DDRM, allowing administrators to maintain optimal performance with ease. This translates to less downtime and a more reliable network experience for users. The ISR4451-X/K9 is also future-ready, thanks to its upgradeable licenses and support for a wide array of modules and interfaces, which means that as your business needs evolve, so too can your network infrastructure without the need for a complete overhaul.
With its comprehensive feature set, expansion capabilities, and the backing of Cisco’s renowned reliability and support ecosystem, investing in the ISR4451-X/K9 helps ensure that your network is not just ready for the challenges of today but also those of tomorrow. It’s a robust, scalable solution that aims to meet the growing demands of modern enterprise networks, making it a smart long-term investment for any organization looking to bolster its networking infrastructure.
nCisco 4451 Integrated Services Router, named as ISR4451-X, which supports 2 Enhanced service-module (SM-X) slots, delivers 1 Gbps to 2Gbps aggregate throughput. This router also supports two kinds of DDRM, data plane and control/services plane, which make administrator easy to manage the router.
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Quick Specs
nFigure 1 shows the appearance of Cisco ISR4451-X/K9.
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nTable 1 shows the Quick Specs.
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| Product Code | Cisco ISR4451-X/K9 |
| Aggregate Throughput | 1 Gbps to 2Gbps |
| Total onboard WAN or LAN 10/100/1000 ports | 4 |
| RJ-45-based ports | 4 |
| SFP-based ports | 4 |
| Enhanced service-module (SM-X) slot | 2 |
| NIM (Network Interface Modules) slots | 3 |
| Onboard ISC slot | 1 |
| DDRM (data plane) | 2 GB (default) / 2 GB (maximum) |
| DDRM (control/services plane) | 4 GB (default) / 16 GB (maximum) |
| Flash Memory | 8 GB (default) / 32 GB (maximum) |
| Power-supply options | Internal: AC, DC (roadmap) and PoE |
| Rack height | 2 RU |
| Dimensions (H x W x D) | 88.9 x 438.15 x 469.9 mm |
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Product Details
nFigure 2 shows the front panel of Cisco ISR4451-X/K9. 
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nNote:
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| â‘ | AC power supply unit (PSU0) | â‘£ | Router power On/Off switch |
| ② | Router fan tray | ⑤ | LEDs |
| â‘¢ | AC power supply unit (PSU1) | ||
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n·Router fan tray is hidden behind removable bezel.
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n·LEDs include 12 indicators.
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nTable 2 shows the LED descriptions.
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| LEDs | Represents | Color | Description |
| PSU | Power Supply Unit (P0 and P1) Status | Green | PSU is on and is providing power. |
| Amber | PSU is on but with errors or in a failure condition. | ||
| Off | Power supply is turned off. | ||
| GE POE | Internal PoE Daughter Card Status | Green | PSU is installed and providing power |
| Amber | PSU is installed but in a failure condition. | ||
| Off | PSU is off. | ||
| FLASH | System Flash Status | Blinking Green | Compact flash/eUSB flash is present and currently being accessed. |
| TEMP | Temperature Status | Solid green | All temperature sensors in the system are within acceptable range. |
| Amber | One or more temperature sensors in the system are outside the acceptable range. | ||
| Off | Temperature is not being monitored. | ||
| PWR | System Power | Green | System power is on and functioning correctly. |
| Green blinking | System power is in the process of shutting down. | ||
| Amber | System power is up, but low level initialization failed. | ||
| Amber blinking | System power is up, but the system failed to come out of reset. | ||
| Off | System power is off. | ||
| POE BOOST | Power Over Ethernet Boost Mode | Green | Two PoE power supplies are installed and operating in boost mode. |
| Off | This can mean one of the following: n n·No PoE PSU installed. n n·One PoE PSU installed. n n·Two PoE PSUs installed and operating in redundant mode. |
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| ISC | ISC Slot Status | Green | PVDM4 is present and enabled. |
| Amber | Initialized with error. | ||
| Off | Not present. | ||
| FAN | Fan Status | Green | All fans are operating. |
| Amber | One fan has stopped working. | ||
| Blinking Amber | Two or more fans have stopped working, or the fan tray has been removed. | ||
| Off | Fans are not being monitored. | ||
| STAT | System Status | Solid green | System operating normally. |
| Blinking amber | BIOS/Rommon is booting. | ||
| Amber | BIOS/Rommon has completed booting, and system is at Rommon prompt or booting platform software. | ||
| Off | System is not out of reset or BIOS image is not loadable. |
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nFigure 3 shows the back panel of Cisco ISR4451-X/K9.
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nNote:
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| ①| USB Type A port | ⑤ | Auxiliary port |
| â‘¡ | GE management port | â‘¥ | GE Ports |
| ③ | USB Type B mini port | ⑦ | NIM Slots |
| ④ | Console port | ⑧ | SM-X Slot |
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n·The NIMs support 2 single-wide or 1 double-wide.
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n·The GE Ports include 4 RJ45 ports and 4 SFP ports.
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The Modules, Cards, Licenses & Accessories
nCisco ISR4451-X/K9 is one of the Cisco 4000 series routers, which support new modules & cards slots, such as NIM, ISC, etc. Besides, Cisco ISR4451-X/K9 can upgrade by licenses.
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nTable 3 shows some recommended modules, cards, licenses and several cables.
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Items n |
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Models n |
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Descriptions n |
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Console and Auxillary Cables n |
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CAB-AUX-RJ45 n |
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Cisco CAB-AUX-RJ45 Auxiliary Cable 8ft with RJ45 and DB25M n |
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CAB-ETH-S-RJ45 n |
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Cisco Router Cable CAB-ETH-S-RJ45 n |
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CAB-CONSOLE-RJ45 n |
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Cisco CAB-CONSOLE-RJ45 Console Cable 6ft with RJ45 and DB9F n |
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CAB-CONSOLE-USB n |
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Cisco CAB-CONSOLE-USB Console Cable 6 ft with USB Type A and mini-B n |
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Licenses n |
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L-SL-44-APP-K9= n |
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Cisco ISR 4431/4451 AppX license L-SL-44-APP-K9= with WAAS/vWAAS 1300/2500 conns RTU n |
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Network Interface Modules n |
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NIM-1MFT-T1/E1 n |
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Cisco Fourth-Generation Multiflex Trunk Voice and WAN network interface module n |
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NIM-2CE1T1-PRI n |
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Cisco Multiflex Trunk Voice and WAN network interface module n |
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NIM-4E/M n |
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Analog voice network interface card (ear and mouth) n |
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NIM-2FXS n |
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Cisco Analog voice network interface card NIM-2FXS n |
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NIM-2FXS/4FXO n |
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Cisco Analog voice network interface card NIM-2FXS/4FXO n |
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NIM-8MFT-T1/E1 n |
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Cisco Fourth-Generation Multiflex Trunk Voice and WAN network interface module n |
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SFPs for On-Board GE Ports n |
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GLC-SX-MMD n |
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Cisco GLC-SX-MMD 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM n |
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GLC-LH-SMD n |
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Cisco GLC-LH-SMD 1000BASE-LX/LH SFP transceiver module, MMF/SMF, 1310nm, DOM n |
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GLC-ZX-SMD n |
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Cisco GLC-ZX-SMD 1000BASE-ZX SFP transceiver module, SMF, 1550nm, DOM n |
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Compare to Similar Items
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| Technical Specifications | ISR4461/K9 | ISR4451-X/K9 | ISR4431/K9 | ISR4351/K9 | ISR4331/K9 | ISR4321/K9 | ISR4221/K9 |
| Aggregate Throughput | 1.5Gbps | 1 Gbps to n n2 Gbps |
500 Mbps to n n1 Gbps |
200 Mbps to n n400 Mbps |
100 Mbps to n n300 Mbps |
50 Mbps to n n100 Mbps |
35 Mbps to 75 Mbps |
| Total onboard WAN or LAN 10/100/1000 ports | 4 | 4 | 4 | 3 | 3 | 2 | 2 |
| RJ-45-based ports | 4 | 4 | 4 | 3 | 2 | 2 | 2 |
| SFP-based ports | 4 | 4 | 4 | 3 | 2 | 1 | 1 |
| Enhanced service-module slots | 3 | 2 | 0 | 2 | 1 | 0 | 0 |
| Doublewide service-module slots | 2 | 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 | 3 | 2 | 2 | 2 |
| OIR (all I/O modules) | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Onboard ISC slot | 1 | 1 | 1 | 1 | 1 | 1 | No |
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