ISR4451-X/K9, Cisco ISR 4000 Series Router, 1-2G throughput/4 WAN-LAN ports/10-core CPU

Is a console port available on the Cisco 4000 Series?

The Cisco 4000 Series has the option of the regular RJ-45 console port as well as the USB console port. As with the ISR G2 routers, only one console port can be used at a time, with preference given to the USB console port. The Cisco 4221 router has a combo RJ-45 port for AUX and Console.

Can the Cisco 4000 Series ISRs handle the failure of a fan?

Yes, for systems with multiple fans (4331 and above). A fully loaded system will function normally below 6000 feet (1.82 km) with a single fan failure. If the ISR is above 6000 feet and in 32ºF (or 0ºC) temperatures it may shut down because of overheating. The system is rated to operate in 32ºF temperatures at up to 10,000 feet (3.05 km).
Failure of a power-supply fan will likely result in overheating and shutdown of the power supply. If power redundancy is required, you should install two power supplies in a 4451-X or 4431.

With redundant power supplies, can we switch the power to primary when it fails and the router is running on the secondary power supply?

There is no concept of primary or secondary power supply for the Cisco 4451-X and 4351. The power supplies are simply redundant, so that when one fails the other power-supply unit (PSU) takes over by transparently providing power to the entire system. No switching or intervention is required. Both share the load when running in the system; however, when one fails the other provides power to the complete unit. When the failed PSU is replaced with a new PSU in the system, the two power supplies are redundant.

What is the difference between PoE Redundancy mode and PoE Boost mode?

Both modes require that two power supplies be installed in the Cisco 4451-X or 4431. Redundancy mode provides backup PoE power to the chassis; full PoE power will be available in the event of a single power supply failure. PoE Boost mode provides double available PoE power—the maximum amount of power from both power supplies combined—meaning that if a single power supply fails the second redundant power supply will be cut in half.

What are the power options for PoE on the Cisco ISR4451-X/K9?

The Cisco ISR4451-X/K9 has two PoE options. Two of the FPGE interfaces can be powered with the addition of a dedicated power-conversion module installed into the system (PWR-GE-POE-4400). This module does not require a higher-capacity system power supply and will work with the default power supply. The PoE power for the FPGE ports is completely independent from PoE power to the rest of the system.

Is the Cisco ISR4451-X/K9 power supply hot-swappable?

Yes. You do not need to power down the chassis to insert or remove a power supply. Also, unlike the 3900 Series ISRs, the bezel and fan tray can remain in place while a power supply is replaced.

Is the Cisco ISR4451-X/K9 power supplY field-replaceable units (FRUs)?

Yes. The power supplY can be replaced in the field.

What type of backplane is used between components in the Cisco ISR4451-X/K9?

The 4000 Series uses multigigabit fabric (MGF) for Layer 2 connectivity between the modules. On the 4451-X, the MGF can provide either 2 Gbps to all NIM slots or up to 10 Gbps to all SM-X slots. The MGF is completely nonblocking and can forward in excess of 50 Gbps.

How many dual inline memory modules (DIMMs) does the Cisco ISR4451-X/K9 have?

The Cisco ISR4451-X/K9 have three DIMM slots. Two slots are used for control-plane and one slot for data-plane memory. 

Where do I position the Cisco 4451-X in comparison to the Cisco 3900 Series ISRs and the ASR 1000 Series Aggregation Services Routers?

The Cisco 4451-X is positioned for high-end enterprise branch offices or enterprise headend where there is a performance requirement of 1 to 2 Gbps with services. Performance-wise the Cisco 4451-X is positioned between the 3945E ISR and the ASR 1001.

How cost-effective is the ISR4451-X/K9?

The ISR4451-X/K9 offers a high-performance, scalable solution for branch offices with 1-2G throughput, making it a cost-effective option for growing businesses.

What are the key features of ISR4451-X/K9?

The ISR4451-X/K9 includes 4 WAN/LAN ports, 4 SFP ports, a 10 Core CPU, and supports Security, Voice, WAAS, Intelligent WAN, OnePK, and AVC features.

What are the application scenarios for the ISR4451-X/K9?

The ISR4451-X/K9 is ideal for branch offices and enterprise environments needing secure, high-performance, and reliable networking.

How can I install the ISR4451-X/K9?

Installation involves mounting the router, connecting the necessary cables to WAN/LAN and SFP ports, and setting up configuration via the console.

Does the ISR4451-X/K9 need an upgrade?

The ISR4451-X/K9 can be upgraded with additional security and service licenses to enhance functionality and performance.

Are there any alternative products to ISR4451-X/K9?

Cisco offers other ISR models like the ISR4431 and ISR4331, which provide different throughput capacities and features.

What accessories are available for ISR4451-X/K9?

Accessories include rack-mount kits, power supply units, and additional interface modules for expanded connectivity.

How does ISR4451-X/K9 compare to similar products?

The ISR4451-X/K9 stands out with its 10 Core CPU and performance flexibility, making it superior in handling demanding applications compared to some competitors.

What are common troubleshooting steps for ISR4451-X/K9?

Common steps include checking physical connections, verifying configuration settings, and using Cisco's troubleshooting commands and tools.

Can the ISR4451-X/K9 handle high traffic volumes?

Yes, with its 1-2G system throughput and separate control data and services CPUs, the ISR4451-X/K9 is designed to manage high traffic efficiently.

How cost-effective is the ISR4451-X/K9?

The ISR4451-X/K9 provides a competitive price-performance ratio with its 1-2G system throughput, making it a cost-effective solution for mid-large businesses.

What are the key features of the ISR4451-X/K9?

The ISR4451-X/K9 features 4 WAN/LAN ports, 4 SFP ports, a 10-core CPU, support for Security, Voice, WAAS, Intelligent WAN, OnePK, AVC, and separate control data and services CPUs.

What are the application scenarios for the ISR4451-X/K9?

The ISR4451-X/K9 is ideal for enterprise branch environments requiring high-performance routing, advanced security, and comprehensive WAN optimization.

How do I install the ISR4451-X/K9?

Installation involves mounting the device in a rack, connecting the necessary cables, and configuring the software via the console interface or web interface.

Does the ISR4451-X/K9 need regular upgrades?

Yes, it's recommended to regularly update the firmware to ensure optimal performance, security patches, and new features are applied.

Are there any alternative products to the ISR4451-X/K9?

Alternatives include the Cisco ISR 4331/K9 and ISR 4321/K9, although performance and features may vary.

What accessories are available for the ISR4451-X/K9?

Accessories include power cables, SFP modules, rack-mount kits, and console cables to enhance functionality and connectivity.

How does the ISR4451-X/K9 compare to similar products?

The ISR4451-X/K9 offers superior throughput and advanced features like Intelligent WAN and AVC, setting it apart from similar routers like the ISR 4331.

What common troubleshooting steps should I follow?

Common troubleshooting includes checking cable connections, verifying configurations, updating firmware, and consulting Cisco's support resources.

How do I configure the ISR4451-X/K9 for initial use?

Initial configuration involves accessing the device via the console, setting up IP addresses, defining security policies, and configuring WAN/LAN interfaces.

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