50Mbps-100Mbps system throughput 2 WAN/LAN ports 1 SFP port Multi-Core CPU, 2 NIM Security Voice WAAS Intelligent WAN OnePK AVC

Additional information




CISCO ISR4321/K9 ROUTER is designed to deliver advanced routing services to small enterprise branch environments. 

Key Benefits of CISCO ISR4321/K9 ROUTER

CISCO ISR4321/K9 ROUTER offers pay-as-you-grow performance and has 50Mbps throughput by default. It also offers increased forwarding capacity to 100Mbps through the use of FL-4320-PERF-K9 licenses. 


Aggregate Throughput50 Mbps to 100 Mbps
Total onboard WAN or LAN 10/100/1000 ports2
RJ-45-based ports2
SFP-based ports1
NIM (Network Interface Modules) slots2
Onboard ISC slot1
Memory4 GB (default) / 8 GB (maximum)
Flash Memory4 GB (default) / 8 GB (maximum)
Power-supply optionsExternal: AC and PoE
Rack height1 RU
Dimensions (H x W x D)44.55 x 369.57 x 294.64 mm
Package Weight9.19 Kg 
Enhanced service-module slots0
Doublewide service-module slots0
NIM slots2
OIR (all I/O modules)Yes
Onboard ISC slot1
Default memory double-data-rate 3 (DDR3) error-correction-code (ECC) DRAM

(Combined control/services/data planes)        

4 GB
Maximum memory DDR3 ECC DRAM (Combined control/services/data planes)8 GB
Default memory DDR3 ECC DRAM (data plane)NA
Maximum memory DDR3 ECC DRAM (data plane)NA
Default memory DDR3 ECC DRAM (control/services plane)NA
Maximum memory DDR3 ECC DRAM (control/services plane)NA
Default flash memory4 GB
Maximum flash memory8 GB
External USB 2.0 slots (type A)1
USB console port -type B mini (up to 115.2 kbps)1
Serial console port – RJ45 (up to 115.2 kbps)1
Serial auxiliary port – RJ45

(up to 115.2 kbps)

Power-supply optionsExternal: AC and PoE
Redundant power supplyN/A
AC input voltage100 to 240 VAC autoranging
AC input frequency47 to 63 Hz
AC input current range, AC power supply (maximum)1.5 to 0.6A
AC input surge current90 A peak and less than 3 Arms per half cycle
Typical power (no modules) (watts)36
Maximum power with AC power supply (watts)125
Maximum power with PoE power supply (platform only) (watts)260
Maximum endpoint PoE power available from PoE power supply (watts)120




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