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Name:
ISR4431/K9
- Description:
- Cisco ISR 4431 (4GE,3NIM,8G FLASH,4G DRAM,IPB)
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3 - List Price:
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$16,566.00
- Price:
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$3,856.00
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Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
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What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
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In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
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Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
ISR4431/K9
Cisco ISR 4431 (4GE,3NIM,8G FLASH,4G DRAM,IPB)
$16,566.00
$3,856.00
50 in Global Warehouse
$3,856.00
77% off
TRUSTED, TRIED, PROVEN
ISR4431/K9 Overview
ISR4431/K9 is a high-performance integrated services router featuring a fixed chassis design with modular expansion slots that cater to critical enterprise applications. It provides multiple WAN and LAN interfaces, versatile power options including redundant capabilities, and integrated services such as voice and video to meet secure branch connectivity requirements.
ISR4431/K9 delivers robust VPN features with IPSec, SSL, GRE, DMVPN, and FlexVPN support, ensuring secure remote access. With gigabit Ethernet technology, proven throughput capacity, built‑in firewall and intrusion prevention, and support for advanced routing protocols, this router is an ideal choice for enterprise branches demanding reliable, high-performance connectivity and redundancy.
What is the price of ISR4431/K9?
Lowest price of ISR4431/K9 is $ 3,856.00. Shop now! Get further exclusive discounts with bulk quotation on ISR4431/K9
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ISR4431/K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec / SSL VPN / GRE / DMVPN / FlexVPN |
| Power Source | AC Power Supply / DC Power Supply / Redundant |
| Routing Protocols | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing |
| Broadband | N/A |
| Architecture | Fixed |
| WAN Configuration | Dual WAN |
| WAN Ports | 2 WAN |
| LAN Ports | 4 LAN Ports |
| Ethernet Technology | 10/100/1000 |
| Wi-Fi Standard | N/A |
| Connectivity Type | Wired |
| Network Protocols | IPv4, IPv6 |
| Remote Management | CLI / SNMP / NETCONF / RESTCONF |
| Compliance Standards | FCC, CE, RoHS |
| Wireless Support | No |
| Speed/Capacity | Gigabit |
| Firewall Features | Yes |
| Features | VPN / VoIP / IPv6 Compatible / Firewall |
| Use Case | Enterprise |
| Management | Managed |
| Form Factor | Rack-mount |
| Integrated Services | Voice / Video / WAN Optimization |
| High Availability Support | Supported |
| Safety | UL |
| EMC | FCC |
| Telecom | N/A |
| Throughput Capacity | 0.2 Gbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection |
| Expansion Slots | NIM / EHWIC / SFP+ |
| Modular Slots Available | 2 Slots |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 4 GB |
| Flash Memory | 512 MB |
| Interface Ports | RJ-45 / SFP+ |
| Power | 275 W |
| Device Type | Router |
| Product Name | Cisco ISR 4431 Integrated Services Router (K9) |
| Height | 1.73 inches |
| Width | 17.2 inches |
| Depth | 16.3 inches |
| Weight | 31 lbs |
ISR4431/K9 Use Case
Secure SD-WAN Edge for Multi-Branch Retail Network
Deploy the ISR4431/K9 Cisco ISR 4431 (4GE, 3NIM, 8G FLASH, 4G DRAM, IPB) as a Cisco SD-WAN edge router across 50+ retail outlets to aggregate MPLS and internet links, enable dynamic path selection, and enforce centralized security policies. Outcome: Cuts WAN connectivity costs by 30%, boosts application uptime to 99.99%, and simplifies branch-to-cloud management via Cisco vManage.
High-Performance Hybrid Cloud Connectivity for Financial Services
Use the ISR4431/K9 Cisco ISR 4431 (4GE, 3NIM, 8G FLASH, 4G DRAM, IPB) at headquarters to establish AES-256 IPsec tunnels to AWS, Azure, and on-premises data centers with granular QoS and encryption. Outcome: Delivers secure 200 Mbps throughput, meets FINRA compliance, and achieves 99.95% availability for latency-sensitive trading and risk-analysis applications.
Industrial IoT Edge Security and Network Segmentation
Implement the ISR4431/K9 Cisco ISR 4431 (4GE, 3NIM, 8G FLASH, 4G DRAM, IPB) in manufacturing facilities to segment IT/OT traffic, apply DPI-powered firewalling, and support MQTT/OPC protocols for real-time automation. Outcome: Reduces cyber-attack surface by 55%, ensures ISA/IEC 62443 compliance, and delivers deterministic, low-latency connectivity for critical industrial processes.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Modular | Modular | Modular |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | FCC, CE, RoHS | CE / FCC / UL | FCC / CE | FCC, CE, UL, RoHS | FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 16.3 inches | 13.9 inches | 20 inches | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | NIM / EHWIC / SFP+ | EHWIC / NIM / SM-X | NIM / EHWIC | EHWIC | EHWIC |
| Features | VPN / VoIP / IPv6 Compatible / Firewall | VPN / Voice / Video / IPv6 Compatible / Firewall / MPLS | VPN / VoIP / IPv6 Compatible / Firewall / WAN Optimization | VPN, VoIP, IPv6 Compatible, Firewall, POE, MPLS, Syslog | VPN / Firewall / Voice / Video / WAN Optimization |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 512 MB | 2 GB | 512 MB | 1 GB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.73 inches | 4.33 inches | 1.75 inches | N/A | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45 / SFP+ | RJ-45 / SFP | RJ-45 / SFP | RJ-45, SFP, Combo Ports | RJ-45 / SFP |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | Modular LAN | 4 LAN Ports | Modular LAN |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 4 GB | 1 GB | 4 GB | 4 GB |
| Modular Slots Available | 2 Slots | 3+ Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | IPv4 / IPv6 / MPLS | IPv4, IPv6 | TCP/IP, IPv4, IPv6, MPLS | IPv4 / IPv6 |
| Power | 275 W | 250 W | 110 W | 370 W | 115W |
| Power Source | AC Power Supply / DC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply with Redundant Options | AC Power Supply / Redundant | AC Power Supply / Redundant |
| Product Name | Cisco ISR 4431 Integrated Services Router (K9) | Cisco ISR 4331 Integrated Services Router | Cisco 4321 Integrated Services Router (C1-CISCO4321/K9) | Cisco ISR4461-SEC/K9 | Cisco ISR4351-DNA |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / SNMP / NETCONF / RESTCONF | SSH / Telnet / SNMP | SSH / Telnet / SNMP | SSH, Telnet, SNMP | CLI / SNMP / Cisco DNA Center |
| Routing Protocols | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL | N/A | N/A | N/A | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | Yes | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.2 Gbps | 0.15 Gbps | 0.15 Gbps | 2 Gbps | 1 Gbps |
| Use Case | Enterprise | Enterprise / Branch | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN / N/A |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | Modular WAN |
| Weight | 31 lbs | 19 lbs | 14 lbs | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.2 inches | 17.4 inches | 17.5 inches | N/A | N/A |
| Wireless Support | No | No | No | No | No |
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Questions & Answers
Q
What is the Cisco ISR 4431 (ISR4431/K9) and its primary purpose?
A
The Cisco ISR 4431 (ISR4431/K9) is a modular branch router designed to deliver secure, high-performance WAN connectivity and application optimization for medium-sized enterprises.
Q
What are the key hardware specifications of the ISR 4431?
A
It features four integrated Gigabit Ethernet ports, three NIM slots for flexible interface expansion, 8 GB flash memory, 4 GB DRAM, and an internal power bracket (IPB).
Q
How much throughput performance does the ISR 4431 deliver?
A
The ISR 4431 delivers up to 1 Gbps aggregate throughput across data, security, and application services in a single platform.
Q
How many network modules can be installed in the ISR 4431?
A
It supports up to three Network Interface Modules (NIMs) for diversified WAN, LAN, and service connectivity.
Q
What security features are integrated in the ISR 4431?
A
It includes Cisco Firepower threat defense, zone-based firewall, VPN encryption, and intrusion prevention for comprehensive branch security.
Q
Does the ISR 4431 support virtualization and NFV?
A
Yes, it runs Cisco IOS XE NFV to host virtual network functions such as vWAN, vFE, and virtual ASA within the router.
Q
Which operating system does the ISR 4431 use?
A
The ISR 4431 operates on Cisco IOS XE, providing a modern, modular OS with programmability and automation features.
Q
Is the power supply included with the ISR4431/K9 model?
A
Yes, the ISR4431/K9 ships with an internal power bracket (IPB) to simplify deployment without external power adapters.
Q
What licensing options are available for the ISR 4431?
A
It offers Cisco Smart Licensing with two tiers—Network Essentials and Network Advantage—enabling on-demand activation of advanced features.
Q
Which deployment scenarios are ideal for the ISR 4431?
A
It is ideal for medium branch offices requiring secure WAN connectivity, unified communications, cloud integration, and application optimization.
Q
Can the ISR 4431 integrate with Cisco DNA Center?
A
Yes, it fully supports Cisco DNA Center for policy-based automation, real-time assurance, and end-to-end network management.
Q
What rack-mounting options are available for the ISR 4431?
A
An optional 1U rack-mount kit is available for 19″ racks, while desktop deployment is supported out of the box.
Q
How can I manage and monitor the ISR 4431?
A
Management is available via Cisco IOS XE CLI, Cisco Prime Infrastructure, Cisco DNA Center, and RESTful APIs for full life-cycle automation.
Q
What warranty and support packages are offered for the ISR 4431?
A
It includes a 1-year hardware warranty. Cisco SMARTnet provides 24×7 support, next-business-day hardware replacement, and software updates.
Q
What are the power consumption and environmental specifications?
A
Typical power consumption is approx. 50 W. Operating temperature ranges from 0 °C to 40 °C with 5–90% non-condensing humidity.
