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Cisco ONE bundle simplified licensing. Router performance has been excellent.
C1-CISCO4431/K9
Cisco ONE ISR 4431 (4GE.3NIM.8G FLASH.4G DRAM.IPB)
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Name:
C1-CISCO4431/K9
- Description:
- Cisco ONE ISR 4431 (4GE.3NIM.8G FLASH.4G DRAM.IPB)
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 818260814745
- Condition:
- Warranty:
- 3
- List Price:
$18,554.00
- Price:
$5,039.0072.8% off
Quantity:
1
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C1-CISCO4431/K9 Overview
C1-CISCO4431/K9 is a high-performance, modular router engineered for enterprise and branch deployments, offering an integrated architecture that supports advanced VPN features, robust throughput, and enhanced performance for mission-critical applications. Designed with redundant power options and multiple WAN/LAN interfaces, it ensures reliable connectivity and secure remote access, meeting the rigorous demands of modern network environments.
The router’s modular capabilities allow for flexible expansion through EHWIC and NIM slots while delivering integrated services such as voice, video, and WAN optimization. With built-in firewall features, high availability support, and detailed QoS and routing protocol options, C1-CISCO4431/K9 is purpose-built for demanding use cases in dynamic and scalable network infrastructures.
C1-CISCO4431/K9 price is $5,039.00, a 72.8% saving from the Cisco list price of $18,554.00. C1-CISCO4431/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1-CISCO4431/K9 for additional pricing. Browse the full Router Isr 4000 series or explore all Cisco products.
C1-CISCO4431/K9 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN / DMVPN / FlexVPN
- Power Source
- AC Power Supply / Redundant
- Routing Protocols
- OSPF / BGP / EIGRP / RIP / Static Routing / MPLS
- Broadband
- N/A
- Architecture
- Modular
- WAN Configuration
- Dual WAN
- WAN Ports
- 4 WAN Ports
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100/1000
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired
- Network Protocols
- IPv4 / IPv6
- Remote Management
- SSH / Telnet / SNMP
- Compliance Standards
- IEEE 802.3 / IEEE 802.1Q
- Wireless Support
- No
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN / VoIP / IPv6 Compatible / Firewall / MPLS
- Use Case
- Enterprise / Branch Office
- Management
- Managed
- Form Factor
- Rack-mount / Chassis
- Integrated Services
- Voice / Video / WAN Optimization
- High Availability Support
- Supported
- Safety
- UL / CE
- EMC
- FCC / CE
- Telecom
- TIA/EIA
- Throughput Capacity
- 2 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention / Malware Protection
- Expansion Slots
- EHWIC / NIM
- Modular Slots Available
- 3+ Slots
- Stacking Capability
- No
- 5G Support
- No
- Memory
- 4 GB
- Flash Memory
- 512 MB
- Interface Ports
- RJ-45 / SFP
- Power
- 370 W
- Device Type
- Router
- Product Name
- Cisco 4431 Integrated Services Router
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
C1-CISCO4431/K9 Use Case
Secure Multisite SD-WAN Deployment for Retail Chain
A national retail chain deploys the C1-CISCO4431/K9-Cisco ONE ISR 4431 (4GE.3NIM.8G FLASH.4G DRAM.IPB) at each of its 75 stores as a dedicated SD-WAN gateway. By leveraging Cisco ONE licensing and dynamic path selection across MPLS and broadband links, the solution delivers 99.99% uptime, optimized application performance at the edge, and centralized policy management. Benefit: Retailers achieve a 30% reduction in WAN costs, enhanced transaction speeds at the point of sale, and a consistent customer experience across all locations.
High-Throughput VPN Aggregation for Financial Services
A global financial institution consolidates remote-worker VPNs onto a pair of C1-CISCO4431/K9-Cisco ONE ISR 4431 routers at its data center, utilizing 4GE ports and three NIM slots for hardware-accelerated AES-256 encryption and firewall services. The robust 8 GB flash and 4 GB DRAM platform sustains over 1.2 Gbps of encrypted throughput while meeting FINRA and GDPR compliance mandates. Benefit: The firm secures high-capacity, low-latency connectivity for 500+ remote advisors, simplifies regulatory audits, and centralizes access control under one hardened edge device.
Integrated Multi-Service Edge for Healthcare Branch Offices
A regional healthcare network installs the C1-CISCO4431/K9-Cisco ONE ISR 4431 at 20 branch clinics to unify routing, firewall, intrusion prevention, and voice QoS over a single platform. Using Cisco ONE software, each clinic enforces HIPAA-compliant security policies, supports telemedicine video conferencing, and prioritizes VoIP traffic across MPLS and DSL links. Benefit: Clinics eliminate four disparate appliances, achieve a 60% reduction in capital and operational expenses, and deliver sub-20 ms latency for critical patient consultations.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 C1-CISCO4431/K9 |  ISR4331/K9 |  ISR4331-VSEC/K9 |  ISR4331-AX/K9 |  ISR4321-SEC/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Modular | Fixed / Modular | Fixed |
| 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 / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | IEEE 802.3 / IEEE 802.1Q | FCC, CE, RoHS | FCC / CE / UL | FCC / CE / UL | FCC, CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | N/A | 16.34 inches | 15.1 inches | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC / CE | N/A | N/A | FCC / CE | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | EHWIC / NIM | EHWIC / NIM | NIM | EHWIC / NIM | NIM, EHWIC |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN, IPv6 Compatible, Firewall, Integrated Services | VPN / IPv6 Compatible / Firewall / MPLS | VPN / IPv6 Compatible / Firewall / WAN Optimization / Voice / Video | VPN, Firewall, IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 512 MB | 4 GB | 512 MB | 512 MB | 1 GB |
| Form Factor | Rack-mount / Chassis | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | N/A | 1.75 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 | RJ-45 / SFP | RJ-45, SFP |
| LAN Ports | 4 LAN Ports | Modular LAN | Modular LAN | 4 LAN Ports | 2 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 4 GB | 4 GB | 4 GB | 2 GB |
| Modular Slots Available | 3+ Slots | 2 Slots | 2 Slots | 3+ Slots | 1 Slot |
| Network Protocols | IPv4 / IPv6 | IPv4, IPv6, MPLS | IPv4, IPv6 | IPv4 / IPv6 | IPv4, IPv6 |
| Power | 370 W | 150W | 130 W | 65 Watts | 75W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply | AC Power Supply / DC Power Supply (Redundant) |
| Product Name | Cisco 4431 Integrated Services Router | Cisco ISR4331/K9 | Cisco ISR 4331 Secure Integrated Services Router | Cisco ISR4331-AX/K9 | Cisco ISR4321-SEC/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / Telnet / SNMP | Telnet, SSH, SNMP, NETCONF | SSH, Telnet, SNMP | SSH / Telnet / SNMP | SSH, Telnet, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing / MPLS | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL / CE | N/A | N/A | UL / IEC | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | TIA/EIA | N/A | N/A | TIA/EIA | N/A |
| Throughput Capacity | 2 Gbps | 100 Mbps | 0.1 Gbps | 0.15 Gbps | 300 Mbps |
| Use Case | Enterprise / Branch Office | Enterprise | Enterprise | Enterprise / Branch | Enterprise, Small Business |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 4 WAN Ports | 2 WAN | Modular WAN | 2 WAN | 2 WAN Ports |
| Weight | N/A | 14.3 lbs | 11 lbs | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | 17.41 inches | 17.5 inches | N/A | N/A |
| Wireless Support | No | No | No | No | No |
Reviews & Ratings
P
Paul Jennings
4
Strong mid range ISR with reliable uptime. Easy to deploy.
S
Simon Carter
5
Handles WAN and security tasks smoothly. Meets expectations.
O
Oliver Matthews
3
Dependable platform for enterprise branch connectivity.
D
Duncan Walsh
4
Cisco quality hardware with consistent performance.
Questions & Answers
What is the Cisco ONE ISR 4431 (SKU: C1-CISCO4431/K9)?
The Cisco ONE ISR 4431 is a high-performance integrated services router delivering enterprise-grade WAN, security, and application services in a single platform.
Which interfaces and expansion slots does the Cisco 4431 ISR support?
It includes four fixed Gigabit Ethernet ports, three NIM slots for WAN modules, and two service-module expansion slots for increased connectivity.
What are the memory and storage specifications of SKU C1-CISCO4431/K9?
This SKU ships with 4 GB DRAM and 8 GB flash storage, supporting fast boots and reliable configuration storage.
What throughput performance can I expect from the ISR 4431?
The ISR 4431 delivers up to 1 Gbps of firewall throughput and 100 Mbps of IPS performance with Cisco ONE software enabled.