Cisco Router ISR 4000 Series ISR4431-DNA Overview
Cisco Router ISR 4000 Series ISR4431-DNA is a genuine edge and wide-area routing product from Cisco, a global name in networking whose platforms are used by enterprises, service providers and data-center operators alike. Belonging to the Cisco Router ISR 4000 Series family, the ISR4431-DNA unit is built to the original factory specification, so it integrates with existing Cisco deployments predictably and behaves exactly as the platform documentation describes. In the network, it is deployed as a standalone unit or as part of a larger managed network, following the standard operating procedures of the platform.
From a specification standpoint, it offers 4 ports for client, server or uplink connectivity; aggregate capacity of 500 Mbps. These are the original factory figures for this model, giving administrators a clear picture of what the unit can deliver before it enters service. Standard mounting, cabling and management practices apply, so deployment follows the same procedures as other Cisco hardware already running in the environment.
Typical deployments include branch and campus WAN connectivity, service-provider edge and MPLS deployments, and secure remote-site interconnect. Organizations commonly source it for refresh programs, capacity expansion and spares management, keeping a tested unit on hand so outages stay short and replacements are predictable. The factory detail for this unit reads: “Cisco ISR 4431 (4GE,3NIM,8G FLASH,4G DRAM,IPB) with DNA sub”. This makes it a practical choice when original-spec hardware is required at a predictable cost.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including port status, console access and firmware state. Our warranty coverage and responsive technical support protect the purchase after it arrives, and our team can confirm revision levels and software compatibility before you order. For volume requirements we also offer configuration checks and staged delivery options.
Contact our sales team for current availability, lead time and shipping options for the ISR4431-DNA. We respond quickly with stock status and a firm quote, so you can plan the refresh or expansion with confidence.
Key Specifications
Applications
Enterprise WAN
Branch and campus routing with advanced services.
Service Provider
Edge routing for ISP and MPLS deployments.
Data Center
Interconnect core and aggregation layers reliably.
Buying a Pre-Owned ISR4431-DNA
Verify the unit is tested, firmware confirmed, and condition documented. Every unit is fully tested and warranty covered. Contact our team for current stock and availability.
ISR4431-DNA Specification | |
Product Code | ISR4431-DNA |
Description | Cisco ISR 4431 (4GE,3NIM,8G FLASH,4G DRAM,IPB) with DNA sub |
Aggregate Throughput (Default) | 500 Mbps |
Aggregate Throughput (Performance License) | 1 Gbps |
Aggregate CEF Only Throughput (Boost License) | Over 4 Gbps |
Total onboard WAN or LAN 10/100/1000 ports | 4 |
Total onboard WAN or LAN 10Gbps ports | N/A |
RJ-45-based ports | 4 |
SFP-based ports | 4 |
NIM slots | 3 |
OIR (all I/O modules) | Yes |
Onboard ISC slot | 1 |
Default memory double-data-rate 3 (DDR3) error-correction-code (ECC) DRAM (Combined control/services/data planes) | N/A |
Maximum memory DDR3 ECC DRAM (Combined control/services/data planes) | N/A |
Default memory DDR3 ECC DRAM (data plane) | 2 GB |
Maximum memory DDR3 ECC DRAM (data plane) | 2 GB |
Default memory DDR3 ECC DRAM (control/services plane) | 4 GB |
Maximum memory DDR3 ECC DRAM (control/services plane) | 16 GB |
Default flash memory | 8 GB |
Maximum flash memory | 32 GB |
External USB 2.0 slots (type A) | 1 |
USB console port -type B mini (up to 115.2 kbps) | 2 |
Serial console port - RJ45 (up to 115.2 kbps) | 1 |
Serial auxiliary port - RJ45(up to 115.2 kbps) | 1 |
Power-supply options | Internal: AC, DC, and PoE |
Redundant power supply | Internal: AC, DC, and PoE |
Power Specifications | |
AC input voltage | 100 to 240 VAC autoranging |
DC Input Voltage Input Voltage Input Current |
48–60 V 12 A Max |
AC input frequency | 47 to 63 Hz |
AC input current range, AC power supply (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) (watts) | 65 |
Maximum power with AC power supply (watts) | 250 (no PoE) |
Maximum power with DC power supply (watts) | 437 (no PoE) |
Maximum power with PoE power supply (platform only) (watts) | 500 with PoE redundant 1000 with PoE boost no redundancy |
Maximum endpoint PoE power available from PoE power supply (watts) | 250 W with optional redundancy |
Maximum endpoint PoE power capacity with PoE boost (watts) | 500 W no redundancy |
Dimensions(H x W x D) | 1.73 x 17.25 x 19.97 in(43.9 x 438.15 x 507.2 mm) |
Rack height | 1 Rack Units (1RU) |
Rack-mount 19in. (48.3 cm) EIA | Included |
Included | Optional |
Wall-mount | Yes |
Airflow | I/O side to bezel side |
MTBF (Hours) | 512970 |
Cisco IOS XE Software | |
Protocols | IPv4, IPv6, static routes, Routing Information Protocol Versions 1 and 2 (RIP and RIPv2), Open Shortest Path First (OSPF), Enhanced IGRP (EIGRP), Border Gateway Protocol (BGP), BGP Router Reflector, Intermediate System-to-Intermediate System (IS-IS), Multicast Internet Group Management Protocol Version 3 (IGMPv3), Protocol Independent Multicast sparse mode (PIM SM), PIM Source Specific Multicast (SSM), RSVP, CDP, ERSPAN, IPSLA, Call Home, EEM, IKE, ACL, EVC, DHCP, FR, DNS, LISP, OTV[6], HSRP, RADIUS, AAA, AVC, Distance Vector Multicast Routing Protocol (DVMRP), IPv4-to-IPv6 Multicast, MPLS, Layer 2 and Layer 3 VPN, IP sec, Layer 2 Tunneling Protocol Version 3 (L2TPv3), Bidirectional Forwarding Detection (BFD), IEEE802.1ag, and IEEE802.3ah |
Encapsulations | Generic routing encapsulation (GRE), Ethernet, 802.1q VLAN, Point-to-Point Protocol (PPP), Multilink Point-to-Point Protocol (MLPPP), Frame Relay, Multilink Frame Relay (MLFR) (FR.15 and FR.16), High-Level Data Link Control (HDLC), Serial (RS-232, RS-449, X.21, V.35, and EIA-530), and PPP over Ethernet (PPPoE) |
Traffic management | QoS, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED), Hierarchical QoS, Policy-Based Routing (PBR), Performance Routing, and NBAR. |
ISR4431-DNA - Deployment Notes
This ISR4431-DNA router serves branch, edge, or WAN-aggregation roles depending on the interface mix and forwarding capacity of the specific SKU. Verify the interface types (GE, 10GE, SFP, WAN), memory, and module slots that this variant provides against your deployment topology.
When planning a refresh, confirm the software feature set (base, advanced, security) applicable to this SKU and the licensed throughput. Our team can confirm software state and hardware revision before dispatch.
Each ISR4431-DNA unit is inspected, tested and verified before leaving our facility, including interface operation, console access, and firmware state. Contact us for volume pricing and staged delivery options.
ISR4431-DNA - Cisco Series Notes
This listing is part of the Cisco enterprise networking product family, sourced and tested by LinkNewNet for enterprise deployment. Cisco router is positioned at the WAN edge, branch, or service-provider aggregation point. It provides routing, VPN, QoS and security services, and integrates with Cisco IOS-XE / IOS-XR management.
Deployment guidance: When planning this ISR4431-DNA unit into a network, confirm the software image (IOS/IOS-XE/NX-OS) required, the power and cooling profile, and the upstream/downstream interface types that match your existing infrastructure. For a like-for-like refresh, match the feature set of the units already in service so management and automation behave consistently.
Our Cisco reconditioning process: Every pre-owned Cisco unit at LinkNewNet passes a documented reconditioning flow before dispatch - visual inspection, internal cleaning, firmware verification, port-by-port testing, and configuration reset to factory defaults. This ensures the unit you receive operates reliably and integrates cleanly with your existing Cisco management tools.
Related models in this family: ISR4331/K9, ISR4451-X/K9, ISR4431/K9, ISR4321/K9, ISR4461/K9. Compare specifications to confirm the right port density, feature set and uplink options for your deployment.
Model code: A = AC power supply / Americas regulatory domain - this suffix indicates the feature set, power, or regulatory variant of the ISR4431-DNA, which affects software licensing and regional compliance.
