Cisco ISR4221-K9 4221 Integrated Services Router


Product Line:
Integrated Services Routers
Form Factor:
Rack Mountable/Wall Mountable
Rack Units:
1 U
IP Base


Used Cisco ISR4221-K9 4221 Integrated Services Router

The Cisco 4000 Series Integrated Services Routers (ISR 4000) revolutionize WAN communications in the enterprise branch. With new levels of built-in intelligent network capabilities and convergence, they specifically address the growing need for application-aware networking in distributed enterprise sites. These locations tend to have lean IT resources. But they often also have a growing need for direct communication with both private data centers and public clouds across diverse links, including Multiprotocol Label Switching (MPLS) VPNs and the internet.   An optional upgrade to the internal power supply provides inline power (802.3af-compliant PoE or 802.3at-compliant PoE+) to optional integrated switch modules. The ISC slot natively supports the Cisco High-Density Packet Voice Digital Signal Processor Modules (PVDM4s), providing a greater-density rich-media voice.


  • Aggregate Throughput: 35 Mbps
  • 10/100/1000 Ports: 2
  • RJ45 Ports: 2
  • SFP Ports: 1
  • NIM Slots: 2
  • ISC Slot: 0
  • Enhanced Service Module Slot: 0
  • Flash Memory: 8 GB
  • DRAM: 4 GB
  • PoE: No
  • Rackmount Ears: 19" included

The ISR4000 series supports a wide variety of cards and options, contact us for a custom configuration.

Cisco ISR 4221 Integrated Services Router Specifications

Aggregate Throughput (default): 35 Mbps

Aggregate Throughput (performance license): 75 Mbps

Aggregate Cisco Express Forwarding Only Throughput (Boost License): 1.2 Gbps

Total onboard WAN or LAN 10/100/1000 ports: 2

Total onboard WAN or LAN 10-Gbps ports: 0

RJ45-based ports: 2

SFP-based ports: 1

Enhanced service module slots: 0

Double wide service module slots: 0

NIM slots: 2

OIR (all I/O modules): No

Onboard ISC slot: No

Default memory (DDR3 ECC DRAM): 4 GB

Maximum memory (DDR3 ECC DRAM)(combined control, services, and data planes): 4 GB

Default memory (DDR3 ECC DRAM) (data plane): -

Maximum memory (DDR3 ECC DRAM) (data plane): -

Default memory (DDR3 ECC DRAM) (control and services plane): -

Maximum memory DDR3 ECC DRAM (control and services plane): -

Default flash memory: 8 GB

Maximum flash memory: 8 GB

External USB 2.0 slots (Type A): 1

USB console port -Type B mini (up to 115.2 kbps): 0

Serial console port - RJ45 (up to 115.2 kbps): 1 (combo CON/AUX port)

Serial auxiliary port - RJ45 (up to 115.2 kbps): 1 (combo CON/AUX port)

Power-supply options: External AC only

Redundant power supply: -

Power specifications

AC input voltage:  100 to 240 VAC auto-ranging

DC input voltage: -

DC input current: -

AC input frequency: 47 to 63 Hz

AC input current range, AC power supply (maximum): 1.5 to 0.6A

AC input surge current: 90A peak and less than 3 Arms per half cycle

Typical power (no modules): 24 W

Maximum power with AC power supply: 90 W

Maximum power with DC power supply: -

Maximum power with PoE power supply (platform only): (No PoE support)

Maximum endpoint PoE power available from PoE power supply: (No PoE support)

Maximum endpoint PoE power capacity with PoE boost: (No PoE support)

Sizes and weights

Dimensions (H x W x D): 1.72 x 12.7 x 10 in (43.7 x 322.6 x 254 mm)

External power supply dimensions (H x W x D): 1.45 x 2.87 x 5.98 in (37 x 73 x 152 mm) (Phihong mfg PN: AA90U120A-R) 1.44 x 2.64 x 6.10 in (36.5 x 67 x 155 mm) (Delta mfg PN: ADP90GR BA)

Shipping box dimensions (H x W x D): 4.13 x 18.25 x 12.94 in (104.9 x 463.6 x 328.7 mm)

Rack height: 1 rack unit (1RU)

Rack-mount 19-in. (48.3 cm) EIA: Optional

Rack-mount 23-in. (58.4 cm) EIA: -

Wall-Mount: Yes

Weight with 1x 450W AC power supply (no modules): -

Weight with 1x 1000W AC power supply + 1 PoE power module (no other modules): -

Weight with AC power supply (no modules): 7.1 lb (3.22 kg)

Weight with DC power supply (no modules): -

Weight with AC power supply with PoE (no modules): -

Typical weight (fully loaded with modules): 8.11 lb (3.68 kg)

Airflow: I/O side to bezel side

Meantime between failures (MTBF): 587,250 hours