• Model-ISR4351-VSEC/K9
  • Aggregate Throughput-200 Mbps to 400 Mbps
  • Total onboard WAN or LAN 10/100/1000 ports-3
  • RJ-45-based ports-3
  • SFP-based ports-3
  • Enhanced service-module (SM-X) slot-2
  • NIM (Network Interface Modules) slots-2
  • Onboard ISC slot-1
  • Memory-4 GB (default) / 16 GB (maximum)
  • Flash Memory-4 GB (default) / 16 GB (maximum)
  • Power-supply options-Internal: AC, DC (roadmap), and PoE
  • Rack height-2 RU
  • Dimensions (H x W x D)-43.9 x 438.15 x 507.2 mm


Predictable performance

Predictable performance

High-availability architecture designed for mission-critical branches that delivers predictable performance at maximum speeds, offering modularity to connect from any remote location.


Network services

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without compromising performance.


Simplified management

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into seconds.


Threat protection

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

SKU: CISCO ISR 4351-VSEC/K9 Category:


Sub Brands



DescriptionCisco ISR 4351 Bundle with UC & Sec Lic. PVDM4-64. CUBE-25
Aggregate Throughput200 Mbps to 400 Mbps
Total onboard WAN or LAN 10/100/1000 ports3
RJ-45-based ports3
SFP-based ports3
Enhanced service-module slots2
Doublewide service-module slots1 (assumes no singlewide SM-X modules installed)
NIM slots3
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)16 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 memory16 GB
External USB 2.0 slots (type A)2
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 optionsInternal: AC, DC, 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)7.1 to 3.0A
AC input surge current60 A peak and less than 12 Arms per half cycle
Typical power (no modules) (watts)48
Maximum power with AC power supply (watts)430
Maximum power with PoE power supply (platform only) (watts)990
Maximum endpoint PoE power available from PoE power supply (watts)500


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