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ISR4431-AX/K9 — Network Technical Data

✓ Verified by PartsTable
CISCO · NETWORK · ROUTER
WHAT YOU NEED TO KNOW
RJ45 = copper (needs CAT6) | SFP+ = fiber (needs transceiver) FLR = FlexibleLOM (HPE integrated) — NOT standard PCIe
Bracket height MUST match chassis — Full Height (2U) vs Low Profile (1U)
PRODUCT OVERVIEW

Cisco ISR4431-AX/K9 ISR 4400 Router, APPX & SEC Bundle with Dual AC. Key specifications include ports: 4x GE RJ45, 2x SFP, memory: 4GB DRAM, 4GB flash (expandable), modules: 2x service module slots, 2x network module slots, formFactor: 1RU rack-mountable, throughput: Up to 1 Gbps, powerSupply: AC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-650-9568, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
NETWORK→ ROUTER→ ISR4431-AX/K9
NSN: 7025-01-650-9568
FSC: 7025
CAGE: 0GX96 — CISCO SYSTEMS INC (USA)
SPECIFICATIONS
ports4x GE RJ45, 2x SFP
modules2x service module slots, 2x network module slots
formFactor1RU rack-mountable
throughputUp to 1 Gbps
powerSupplyAC
NSN7025-01-650-9568
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 2-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN ISR4431-AX/K9 MFR CISCO Cisco ISR4431-AX/K9 ISR 4400 Router, APP
KEY FEATURES
•
Up to 4GB DRAM, 4GB flash (expandable)
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESISR 4000,IP BASE + SECURITY + ADVANCED NETWORKING PROTOCOLS
SPECIAL FEATURESISR 4000,IP BASE + SECURITY + ADVANCED NETWORKING PROTOCOLS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
ISR4431-AX/K9Interchangeable
Cisco ISR4431-AX/K9 ISR 4400 Router, APPX & SEC Bundle with Dual AC
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMATSourcing: other
RELATED PARTS 6
C2901-AX/K9
Cisco 2901 wired router Gigabit Ethernet Black
C3850-NM-4-1G
Cisco Catalyst 3850 4 x 1GE Network Module
SFP-10G-SR
CISCO 10GBASE-SR SFP
SFP-10G-LR
CISCO 10GBASE-LR SFP Module
GLC-FE-100FX=
CISCO 100BASE-FX SFP for FE port
C9300-NM-8X
CISCO Catalyst 9300 8 x 10GE Network Module
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FREQUENTLY ASKED QUESTIONS
What is ISR4431-AX/K9?
ISR4431-AX/K9 is a Cisco ISR4431-AX/K9 ISR 4400 Router, APPX & SEC Bundle with Dual AC manufactured by CISCO. It is classified as a NETWORK (ROUTER).
What parts can replace ISR4431-AX/K9?
There is 1 known substitute for ISR4431-AX/K9: ISR4431-AX/K9. Substitute compatibility should be verified for your specific system.
What is the NSN for ISR4431-AX/K9?
ISR4431-AX/K9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-650-9568. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: August 2026