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by Cisco
Product Line: Cisco ISR4321-DNA
Product Type: Router
Original price $0.00 - Original price $2,464.00
Original price
$0.00 - $2,464.00
Current price $2,464.00
Title: Surplus

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Product Description

The ISR4321-DNA Cisco integrates 2 NIM slots and a single Onboard ISC slot, supporting a diverse range of network interfaces and services. It operates on an external AC power supply, with options for power over Ethernet (PoE), delivering a maximum power of 125 watts for AC and 260 watts with PoE supply. Designed for efficient space utilization, it measures 1.75 x 14.55 x 11.60 inches and fits within a 1 rack unit (1RU), ensuring compatibility with standard 19-inch rack mount configurations.

Key Feature for the ISR4321-DNA

  • What are the available service module slots in this device?
    There are no enhanced or doublewide service module slots available.
  • How many Network Interface Module (NIM) slots does the device have?
    It has 2 NIM slots.
  • Is there an onboard ISC slot?
    Yes, there is 1 onboard ISC slot.
  • What are the power supply options for this hardware?
    External: AC and Power over Ethernet (PoE) are the power supply options.
  • Does the device support a redundant power supply?
    No, a redundant power supply is not available.
  • What is the AC input voltage range?
    The AC input voltage range is 100 to 240 VAC auto-ranging.
  • What are the typical and maximum power consumption values?
    Typical power consumption is 36 watts, with a maximum of 125 watts using an AC power supply and 260 watts with a PoE power supply.
  • How much PoE power is available for endpoints?
    120 watts of PoE power is available for endpoints.
  • What are the dimensions of the device and its external power supply?
    The device measures 1.75 x 14.55 x 11.60 inches, and the external power supply measures 2.95 x 1.18 x 6.10 inches.
  • What is the Mean Time Between Failures (MTBF) for this device?
    The MTBF is 593,270 hours.

Product Review

The Cisco ISR4321-DNA offers reliable performance with its two Network Interface Module (NIM) slots and one onboard Internal Service Module (ISC) slot, providing flexibility for various networking needs. However, it lacks redundant power supply options, which may be a concern for environments requiring high availability. Additionally, its power efficiency is highlighted by the unit's ability to support Power over Ethernet (PoE) with a maximum power output of 260 watts, suitable for powering endpoint devices directly from the router.


The Cisco ISR4321-DNA is a versatile integrated services router designed to efficiently manage and direct data traffic within both small and medium-sized enterprise networks. This product integrates a range of features tailored to facilitate secure and reliable connectivity, making it an essential component for modern networking needs. At the core of its design, the ISR4321-DNA supports enhanced service module slots and comes equipped with two Network Interface Module (NIM) slots, alongside a single onboard Internal Service Card (ISC) slot, offering flexibility in connectivity options. Despite not supporting redundant power supply configurations, the device ensures consistent performance with its external power supply options, including AC and Power over Ethernet (PoE). The router operates within a broad AC input voltage range of 100 to 240 VAC, auto-ranging, and accommodates an AC input frequency of 50 to 60 Hz. Its AC input current range peaks at 1.5 to 0.6A, with a surge current capacity of 90 A peak, ensuring stability even under fluctuating power conditions. Energy efficiency is a key consideration, with typical power consumption at 36 watts under no module load, scaling up to 125 watts with an AC power supply, and 260 watts when the PoE power supply is utilized. The maximum endpoint PoE power available stands at 120 watts, supporting various PoE devices. Physically, the ISR4321-DNA maintains a compact profile with dimensions of 1.75 x 14.55 x 11.60 inches, fitting comfortably into a single rack unit (1RU) space. The external power supply unit further complements this compactness, measuring just 2.95 x 1.18 x 6.10 inches. Despite its small size, the router is capable of being rack-mounted in standard 19-inch EIA racks, with wall-mounting options also available for added installation flexibility. The weight of the router with an AC power supply and without modules is approximately 7.7 lb, which can reach up to 9.14 lb when fully equipped with modules, plus an additional 1.2 lb for the external power supply. This lightweight design facilitates easy installation and maintenance. For environmental control, the ISR4321-DNA ensures optimal performance through its directed airflow from the right I/O side to the left I/O side, maintaining the device's operational integrity between 32º to 104ºF. The mean time between failures (MTBF) is calculated at 593,270 hours, indicating a high level of reliability over extended periods. Key specifications include: -
  • NIM slots: 2
  • Onboard ISC slot: 1
  • Power supply: External AC and PoE
In summary, the Cisco ISR4321-DNA stands out for its adaptability, energy efficiency, and reliable performance in supporting the networking needs of small to medium-sized enterprises. This router not only provides secure and flexible connectivity options but also demonstrates Cisco's commitment to durability and operational excellence in networking hardware.


Part Number and Manufacturer Cisco ISR4321-DNA
Slots for Enhanced Service Modules 0
Slots for Double-Wide Service Modules 0
Network Interface Module (NIM) Slots 2
Internal Service Card (ISC) Slot Built-In 1
Options for Power Supply External AC and Power over Ethernet (PoE)
Availability of Redundant Power Supply Not Available
Input Voltage for AC, Auto-Sensing 100 to 240 VAC
Frequency, AC Input 50 to 60 Hz
Current Range for AC Input at Maximum Power 1.5 to 0.6A
Surge Current for AC Input 90 A peak, under 3 Arms per half-cycle
Power Consumption without Modules (Watts) 36
Highest Power with AC Supply (Watts) 125
Highest Power with PoE Supply (Platform Only) (Watts) 260
Maximum PoE Power Available for Devices 120
Device Dimensions (H x W x D) 1.75 x 14.55 x 11.60 inches (44.55 x 369.57 x 294.64 mm)
Dimensions of External Power Supply (H x W x D) 2.95 x 1.18 x 6.10 inches (75 x 30 x 155 mm)
Unit Size for Rack Mounting 1 Rack Unit (1RU)
19-Inch Rack Mount Compatibility Provided
23-Inch Rack Mount Compatibility Not Available
Option for Wall Mounting Available, with mounting holes on the underside
Weight with AC Power Supply (Without Modules) 7.7 lbs (3.5 kg) + External PS 1.2 lbs (0.66 kg)
Typical Weight When Fully Equipped 9.14 lbs (4.2 kg) + External PS 1.2 lbs (0.66 kg)
Airflow Direction From Right I/O to Left I/O Side
Mean Time Between Failures (MTBF) 593,270 Hours
Operational Temperature Range 32º to 104ºF (0º to 40ºC)

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