Name: Cisco ISR 4431 (4GE,3NIM,8G FLASH,4G DRAM,IPB)
Brand: Cisco
SKU: ISR4431/K9
Price: 3856.00 USD
Availability: InStock
Rating: 4.2 (5 reviews)

Question 1

What is the Cisco ISR 4431 (ISR4431/K9) and its primary purpose?

Accepted Answer

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.

Question 2

What are the key hardware specifications of the ISR 4431?

Accepted Answer

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).

Question 3

How much throughput performance does the ISR 4431 deliver?

Accepted Answer

The ISR 4431 delivers up to 1 Gbps aggregate throughput across data, security, and application services in a single platform.

Question 4

How many network modules can be installed in the ISR 4431?

Accepted Answer

It supports up to three Network Interface Modules (NIMs) for diversified WAN, LAN, and service connectivity.

Question 5

What security features are integrated in the ISR 4431?

Accepted Answer

It includes Cisco Firepower threat defense, zone-based firewall, VPN encryption, and intrusion prevention for comprehensive branch security.

Question 6

Does the ISR 4431 support virtualization and NFV?

Accepted Answer

Yes, it runs Cisco IOS XE NFV to host virtual network functions such as vWAN, vFE, and virtual ASA within the router.

Question 7

Which operating system does the ISR 4431 use?

Accepted Answer

The ISR 4431 operates on Cisco IOS XE, providing a modern, modular OS with programmability and automation features.

Question 8

Is the power supply included with the ISR4431/K9 model?

Accepted Answer

Yes, the ISR4431/K9 ships with an internal power bracket (IPB) to simplify deployment without external power adapters.

Question 9

What licensing options are available for the ISR 4431?

Accepted Answer

It offers Cisco Smart Licensing with two tiers—Network Essentials and Network Advantage—enabling on-demand activation of advanced features.

Question 10

Which deployment scenarios are ideal for the ISR 4431?

Accepted Answer

It is ideal for medium branch offices requiring secure WAN connectivity, unified communications, cloud integration, and application optimization.

Question 11

Can the ISR 4431 integrate with Cisco DNA Center?

Accepted Answer

Yes, it fully supports Cisco DNA Center for policy-based automation, real-time assurance, and end-to-end network management.

Question 12

What rack-mounting options are available for the ISR 4431?

Accepted Answer

An optional 1U rack-mount kit is available for 19″ racks, while desktop deployment is supported out of the box.

Question 13

How can I manage and monitor the ISR 4431?

Accepted Answer

Management is available via Cisco IOS XE CLI, Cisco Prime Infrastructure, Cisco DNA Center, and RESTful APIs for full life-cycle automation.

Question 14

What warranty and support packages are offered for the ISR 4431?

Accepted Answer

It includes a 1-year hardware warranty. Cisco SMARTnet provides 24×7 support, next-business-day hardware replacement, and software updates.

Question 15

What are the power consumption and environmental specifications?

Accepted Answer

Typical power consumption is approx. 50 W. Operating temperature ranges from 0 °C to 40 °C with 5–90% non-condensing humidity.

	ISR4431/K9	C1-CISCO4321/K9	ISR4351-DNA	ISR4461-SEC/K9	ISR4331-V/K9
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	Firewall / Intrusion Prevention / Malware Protection	Firewall, Intrusion Prevention, Malware Protection	Firewall / Intrusion Prevention / Malware Protection
Compliance Standards	FCC, CE, RoHS	FCC / CE	FCC / CE	FCC, CE, UL, RoHS	CE / FCC / UL
Connectivity Type	Wired	Wired	Wired	Wired	Wired
Depth	16.3 inches	20 inches	N/A	N/A	13.9 inches
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+	NIM / EHWIC	EHWIC	EHWIC	EHWIC / NIM / SM-X
Features	VPN / VoIP / IPv6 Compatible / Firewall	VPN / VoIP / IPv6 Compatible / Firewall / WAN Optimization	VPN / Firewall / Voice / Video / WAN Optimization	VPN, VoIP, IPv6 Compatible, Firewall, POE, MPLS, Syslog	VPN / Voice / Video / IPv6 Compatible / Firewall / MPLS
Firewall Features	Yes	Yes	Yes	Yes	Yes
Flash Memory	512 MB	512 MB	256 MB	1 GB	2 GB
Form Factor	Rack-mount	Rack-mount	Rack-mount	Rack-mount	Rack-mount
Height	1.73 inches	1.75 inches	N/A	N/A	4.33 inches
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	Modular LAN	Modular LAN	4 LAN Ports	4 LAN Ports
Management	Managed	Managed	Managed	Managed	Managed
Memory	4 GB	1 GB	4 GB	4 GB	4 GB
Modular Slots Available	2 Slots	2 Slots	2 Slots	2 Slots	3+ Slots
Network Protocols	IPv4, IPv6	IPv4, IPv6	IPv4 / IPv6	TCP/IP, IPv4, IPv6, MPLS	IPv4 / IPv6 / MPLS
Power	275 W	110 W	115W	370 W	250 W
Power Source	AC Power Supply / DC Power Supply / Redundant	AC Power Supply with Redundant Options	AC Power Supply / Redundant	AC Power Supply / Redundant	AC Power Supply / Redundant
Product Name	Cisco ISR 4431 Integrated Services Router (K9)	Cisco 4321 Integrated Services Router (C1-CISCO4321/K9)	Cisco ISR4351-DNA	Cisco ISR4461-SEC/K9	Cisco ISR 4331 Integrated Services Router
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	CLI / SNMP / Cisco DNA Center	SSH, Telnet, SNMP	SSH / Telnet / SNMP
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	No	No	No	Yes
Telecom	N/A	N/A	N/A	N/A	N/A
Throughput Capacity	0.2 Gbps	0.15 Gbps	1 Gbps	2 Gbps	0.15 Gbps
Use Case	Enterprise	Enterprise	Enterprise	Enterprise	Enterprise / Branch
VPN Support	IPSec / SSL VPN / GRE / DMVPN / FlexVPN	IPSec / SSL VPN / DMVPN / FlexVPN	IPSec / SSL VPN / DMVPN / FlexVPN / N/A	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	Modular WAN	2 WAN	2 WAN
Weight	31 lbs	14 lbs	N/A	N/A	19 lbs
Wi-Fi Standard	N/A	N/A	N/A	N/A	N/A
Width	17.2 inches	17.5 inches	N/A	N/A	17.4 inches
Wireless Support	No	No	No	No	No

ISR4431/K9

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Questions & Answers

What is the Cisco ISR 4431 (ISR4431/K9) and its primary purpose?

What are the key hardware specifications of the ISR 4431?

How much throughput performance does the ISR 4431 deliver?

How many network modules can be installed in the ISR 4431?

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