• Model-Cisco ISR4461-SEC/K9
  • Aggregate Throughput-1.5Gbps
  • Total onboard WAN or LAN 10/100/1000 ports-4
  • RJ-45-based ports-4
  • SFP-based ports-4
  • Enhanced service-module slots-3
  • Doublewide service-module slots-2
  • NIM (Network Interface Modules) slots-3
  • OIR (all I/O modules)-Yes
  • Onboard ISC slot-1
  • Rack height-2 RU
  • Dimensions (H x W x D)-(88.9 x 438.15 x 469.9 mm)


Predictable performance

Predictable performance

High-availability architecture designed for mission-critical branches that delivers predictable performance at maximum speeds, offering modularity to connect from any remote location.


Network services

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without compromising performance.


Simplified management

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into seconds.


Threat protection

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

SKU: CISCO ISR 4461-SEC/K9 Category:


Sub Brands


BundleSecurity Bundle
Aggregate Throughput1.5Gbps
Total onboard WAN or LAN 10/100/1000 ports4
RJ-45-based ports4
SFP-based ports4
Enhanced service-module slots3
Doublewide service-module slots2
NIM slots3
OIR (all I/O modules)Yes
Onboard ISC slot1
Default memory double-data-rate 3 (DDR3) error-correction-code (ECC) DRAM (Combined control/services/data planes)NA
Maximum memory DDR3 ECC DRAM (Combined control/services/data planes)NA
Default memory DDR3 ECC DRAM (data plane)4 GB
Maximum memory DDR3 ECC DRAM (data plane)4 GB
Default memory DDR3 ECC DRAM (control/services plane)8 GB
Maximum memory DDR3 ECC DRAM (control/services plane)32 GB
Default flash memory8 GB
Maximum flash memory32 GB
External USB 2.0 slots (type A)2
USB console port -type B mini (up to 115.2 kbps)1
Serial console port – RJ45 (up to 115.2 kbps)1
Serial auxiliary port – RJ45 (up to 115.2 kbps)1
Power-supply optionsInternal: AC, DC and PoE
Redundant power supplyInternal: AC, DC and PoE

Power Specifications

AC input voltage100 to 240 VAC auto ranging
AC input frequency47 to 63 Hz
AC input current range, AC power supply (maximum)7.1 to 3.0A
AC input surge current60 A peak and less than 5 Arms per half cycle
Typical power (no modules) (watts)
Maximum power with AC power supply (watts)1000W (no PoE)
Maximum power with PoE power supply (platform only) (watts)1000 with PoE redundant

1450 with PoE boost no redundancy

Maximum endpoint PoE power available from PoE power supply (watts)500 W with optional redundancy
Maximum endpoint PoE power capacity with PoE boost (watts)950 W no redundancy

Sizes and Weights

(H x W x D)
3.5 x 17.25 x 18.5 in

88.9 x 438.15 x 469.9 mm)

External Power Supply Dimensions (H x W x D)N/A
Rack height2 Rack Units (2RU)
Rack-mount 19in. (48.3 cm) EIAIncluded
Rack-mount 23in. (58.4 cm) EIAOptional
Weight with 1, 450-WAC power supply (no modules)
Weight with 1 1,000-WAC power supply+ 1 PoE power module (no other modules)
Weight with AC PS (no modules)
Weight with AC PS with POE (no modules)
Typical weight (fully loaded with modules)
AirflowI/O side to bezel side
MTBF (Hours)480770

Environmental Specifications

Operating Conditions

Temperature32 to 104ºF

(0 to 40ºC)



0 – 6,560 ft.

(0 – 2,000 m)


(Rest of the world)

0 – 10,000 ft.

(0 – 3,050 m)

Relative humidity5% to 85%
Short-term humidity5% to 90%, not to exceed 0.024 kg water/kg of dry air
Acoustics: Sound pressure (Typical/maximum)50.6/73.1 dBA
Acoustics: Sound power (Typical/maximum)58.2/78.8 dBA

Non operating Conditions

Temperature-40 to 158ºF

(-40 to 70ºC)

Relative humidity5% to 95%
Altitude15,584 ft (4750m)

Regulatory and Compliance

SafetyUL 60950-1

CAN/CSA C22.2 No. 60950-1

EN 60950-1

AS/NZS 60950-1

IEC 60950-1

EMC47 CFR, Part 15

ICES-003 Class A

EN55032 Class A

CISPR32 Class A



CNS 13438

EN 300-386

EN 61000 (Immunity)

EN 55024, CISPR 24

KN22, KN24


IC CS-03:2004


HKTA 2028:2010

HKTA 2017:2010

HKTA 2015: 2006




DSPR Gray Book:2000

DSPR Technical Condition: 2004


AS/ACIF S016: 2001

AS/ACIF S038: 2001


TBR 4:1995

TBR 12:1993

TBR 13:1996

RRA 2009-38

(RRL 2005-96)



IS6100: 2004

PTC 220:2008


IEEE 802.3

ANSA X3.263

Cisco IOS XE Software

ProtocolsIPv4, IPv6, static routes, Routing Information Protocol Versions 1 and 2 (RIP and RIPv2), Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (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), Resource Reservation Protocol (RSVP), Cisco Discovery Protocol, Encapsulated Remote Switched Port Analyzer (ERSPAN), Cisco IOS IP Service-Level Agreements (IPSLA), Call Home, Cisco IOS Embedded Event Manager (EEM), Internet Key Exchange (IKE), access control lists (ACL), Ethernet Virtual Connections (EVC), Dynamic Host Configuration Protocol (DHCP), Frame Relay (FR), DNS, Locator ID Separation Protocol (LISP), Overlay Transport Virtualization (OTV), Hot Standby Router Protocol (HSRP), RADIUS, authentication, authorization, and accounting (AAA), Application Visibility and Control (AVC), Distance Vector Multicast Routing Protocol (DVMRP), IPv4-to-IPv6 Multicast, MPLS, Layer 2 and Layer 3 VPN, IPsec, Layer 2 Tunneling Protocol Version 3 (L2TPv3), Bidirectional Forwarding Detection (BFD), IEEE 802.1ag, and IEEE 802.3ah
EncapsulationsGeneric 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 managementQoS, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED), Hierarchical QoS, Policy-Based Routing (PBR), Performance Routing (PfR), and Network-Based Application Recognition (NBAR)
Cryptographic algorithmsEncryption: DES, 3DES, AES-128 or AES-256 (in CBC and GCM modes); Authentication: RSA (748/1024/2048 bit), ECDSA (256/384 bit); Integrity: MD5, SHA, SHA-256, SHA-384, SHA-512

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