ISR4431-V/K9, Cisco ISR4431 Router, 1Gbps throughput/4 SFP/4 WAN-LAN

  • Brand: Cisco
  • Model: ISR4431-V/K9
Rating:
96%
4.8/5.0
List Price: $22,257.00
57% OFF
$9,649.00
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    Overview
    End-of-Life Notice
    End-of-Life Notice
    ISR4431-V/K9 is officially EOL. Service support ends on 2028-11-30.
    For full lifecycle details, see ISR4431-V/K9 EOL.
    Recommended Replacement
    Recommended Replacement
    Official replacement model. Aligned with current deployment environments.

    Cisco ISR4431-V/K9 Overview

    The Cisco ISR4431-V/K9 is an enterprise-class integrated services router built for secure branch and regional networks. Delivering 500Mbps to 1Gbps aggregate throughput, it consolidates WAN, LAN, and VoIP services on a single platform. Four 10/100/1000 RJ-45 ports and four SFP-based ports provide flexible WAN/LAN connectivity for service providers, SMBs, and large enterprises. With three NIM slots, PoE-capable power options, and OIR support, the ISR4431-V/K9 simplifies scalable deployments across Asia, Europe, Africa, and North America for distributors, integrators, and end users.

    Product Highlights

    1Gbps
    WAN Speed
    4GE+4SFP
    Flex Ports
    3 NIM
    Modular I-O

    Product Components Breakdown

    Front Panel of the Product:

    ISR4431-V/K9 front Panel

    Rear Panel of the Product:

    ISR4431-V/K9 Back Panel

    Product Applications Scenarios

    Enterprise Network
    Delivers up to 1Gbps routing with integrated VoIP and flexible WAN ports, consolidating services and cutting branch WAN hardware costs by up to 30%.
    Cloud Services
    High-throughput IPsec-ready platform with 4GE and 4 SFP uplinks optimizes secure connectivity to public or private clouds across regions.
    Service Providers
    Three NIM slots and OIR support let operators deliver managed CPE and voice services while reducing truck-roll and upgrade time by 40%.

    Product Features Comparison

      Cisco ISR4431-V/K9 C2821-4SHDSL/K9 C1921-ADSL2-M/K9 CISCO1921/K9
    Model ISR4431-V/K9 C2821-4SHDSL/K9 C1921-ADSL2-M/K9 CISCO1921/K9
    Brand Cisco Cisco Cisco Cisco
    Routing Throughput 500Mbps to 1Gbps Up to 179 Mbps n/a n/a
    Interface Configuration 4 x RJ-45 10/100/1000, 4 x SFP, 3 x NIM 4 G.SHDSL interfaces, 4-pair G.SHDSL HWIC slot 2 x GE RJ-45, 1 x ADSL2+ RJ-11, serial/USB console 2 x RJ-45 10/100/1000, 2 x EHWIC slots, console/aux/USB
    Supported Protocol n/a n/a OSPF, IS-IS, BGP, EIGRP, multicast, IPv4/IPv6, MPLS, QoS n/a
    VPN Capability n/a Integrated Security Services IPSec, L2TP, VPN support Embedded cryptography, IPsec + SSL
    Integrated Features VoIP, OIR, PoE/AC/DC options, USB, console/aux ports Integrated security, SP Services, web/CLI/SNMP management Firewall, VPN, MPLS, QoS, DSL modem, ADSL2+ PoE option, multiple power models, extensive safety/EMC

    Optional Add-ons

    Model Number Description
    NIM-2GE-CU-SFP Cisco 2-Port Gigabit Ethernet NIM with RJ-45/SFP combo interfaces for ISR 4000 expansion
    PWR-4430-POE-AC Cisco AC PoE power supply for ISR4431 series, enabling PoE on supported modules
    SFP-1G-LX Cisco 1GBASE-LX SFP transceiver module for long-range fiber uplinks on ISR4431 SFP ports

    Quality Certifications

    • ISO 14001
    • ISO 9001
    • RoHS
    • REACH
    • CE
    • FCC
    Specification

    Cisco ISR4431-V/K9 Specification

    Model
    ISR4431-V/K9
    Brand
    Cisco
    Description
    Cisco ISR 4431 (4GE, 3NIM, 8G FLASH, 4G DRAM, VoIP)
    Aggregate Throughput
    500Mbps to 1Gbps
    Total Onboard WAN or LAN 10/100/1000 Ports
    4
    RJ-45-based Ports
    4
    SFP-based Ports
    4
    Enhanced Service-Module Slots
    0
    Doublewide Service-Module Slots
    0
    NIM Slots
    3
    OIR (All I/O Modules)
    Yes
    Onboard ISC Slot
    1
    Default DDR3 ECC DRAM (Combined Control/Services/Data Planes)
    N/A
    Maximum DDR3 ECC DRAM (Combined Control/Services/Data Planes)
    N/A
    Default DDR3 ECC DRAM (Data Plane)
    2GB
    Maximum DDR3 ECC DRAM (Data Plane)
    2GB
    Default DDR3 ECC DRAM (Control/Services Plane)
    4GB
    Maximum DDR3 ECC DRAM (Control/Services Plane)
    16GB
    Default Flash Memory
    8GB
    Maximum Flash Memory
    32GB
    External USB 2.0 Slots (Type-A)
    2
    USB Console Port (Type-B Mini)
    1 (up to 115.2 kbps)
    Serial Console Port
    1 x RJ-45 (up to 115.2 kbps)
    Serial Auxiliary Port
    1 x RJ-45 (up to 115.2 kbps)
    Power-Supply Options
    Internal: AC, DC, and PoE
    Redundant Power Supply
    Internal: AC, DC, and PoE
    AC Input Voltage
    100 to 240 VAC autoranging
    AC Input Frequency
    47 to 63 Hz
    AC Input Current Range (Maximum)
    3 to 1.3 A
    AC Input Surge Current
    60 A peak and less than 5 Arms per half cycle
    Typical Power (No Modules)
    65W
    Maximum Power with AC Power Supply
    250W (no PoE)
    Maximum Power with PoE Power Supply (Platform Only)
    500W with PoE redundant
    Maximum Endpoint PoE Power Available
    250W with optional redundancy
    Weight
    20.88 kg

    Get more information

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    Quality Certifications

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    Q&A

    Questions & Answers

    Does the ISR4431-V/K9 support WAAS?

    Yes, the ISR4431-V/K9 router supports WAAS (Wide Area Application Services), improving application performance over the WAN.

    What is Intelligent WAN on the ISR4431-V/K9?

    The ISR4431-V/K9 router's Intelligent WAN enables optimized routing, ensuring cost-effective and high-performance WAN connectivity.

    Are there separate CPUs for control, data, and services on the ISR4431-V/K9?

    Yes, the ISR4431-V/K9 router has separate CPUs for control, data, and services, ensuring efficient processing and performance.

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