C1121-4P – 4 LAN – 2 WAN (1 GE combo) – Integrated Services Routers

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C1121-4P

(4 customer reviews)
Questions

5/mo Solds

List Price: $1200 $308.24
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C1121-4P Description

The Cisco C1121-4P Integrated Services Router (ISR) is a secure and high-performance solution for modern enterprise branch offices and SMBs. Offering 4 Gigabit LAN ports, dual Gigabit WAN uplinks (RJ-45 and combo SFP), and advanced Cisco IOS XE features, this router provides reliable connectivity and scalability. With support for SD-WAN, VPN, and advanced security services, the C1121-4P ensures efficient branch networking. Compact yet powerful, it is ideal for businesses seeking enterprise-class routing in a cost-effective, space-saving device.

Product Highlights

WAN Ports
LAN Ports
Max Throughput(IPv4 IMIX)

C1121-4P Rear Panel

C1121-4P-front

1

Reset button

2

Power switch

3

4-pin power connector

4

Ethernet switch

5

RJ-45 stacked connector

6

GE WAN 0/0/0 -RJ45

7

GE WAN 0/0/0 -SFP

8

Micro-USB console

9

USB 3.0

10

Kensington lock slot

11

Grounding

Quick Specs

Parameter

Details

Product Model

Cisco C1121-4P

Series

Cisco ISR 1000 Series

LAN Ports

4 × Gigabit Ethernet

WAN Ports

2 × Gigabit Ethernet (1 RJ-45 + 1 combo RJ-45/SFP)

Performance

Up to 370 Mbps IPsec throughput

DRAM / Flash

4 GB / 4 GB

Console Ports

Micro-USB

Power Supply

66W AC adapter (115W optional PoE)

PoE Support

Optional (2 PoE / 1 PoE+)

Dimensions (H×W×D)

1.65 × 10.80 × 7.85 in

Weight

3.43 lb (1.55 kg)

Minimum IOS XE Version

17.2.1

Key Features

Integrated 4-Port Gigabit Ethernet Switch

Provides high-speed, managed LAN connectivity for branch users and critical devices, supporting up to four endpoints with enterprise reliability.

Dual Flexible WAN Uplinks

Features two WAN ports (1 × RJ-45, 1 × Combo SFP/RJ-45), allowing versatile uplink options and automatic failover for maximum business continuity in branch, retail, or remote scenarios.

Enterprise Security & SD-WAN Ready

Built-in advanced security, including VPN, firewall, and segmentation, plus native SD-WAN support for secure, scalable, and centrally managed connectivity.

Optional Power over Ethernet (PoE/PoE+)

Supports up to 2 PoE or 1 PoE+ ports to directly power IP phones, wireless access points, or surveillance cameras—streamlining branch deployments and lowering installation costs.

Compact, Fanless & Silent Operation

The C1121-4P’s silent, fanless design makes it ideal for office desktops, healthcare, education, and anywhere low noise and space-saving are priorities.

High Throughput & Easy Centralized Management

Delivers up to 1.6 Gbps performance, with robust Cisco IOS XE features and compatibility with WebUI, CLI, Cisco vManage, and DNA Center for streamlined operations.

Applications Scenarios

Small Branch & Distributed Offices

Secure, reliable routing and switching for remote and multi-site businesses.

Retail, Hospitality & Healthcare

PoE support for IP surveillance, wireless, and point-of-sale terminals in compact environments.

Education & Government

Quiet, energy-efficient connectivity for classrooms, libraries, and public sector locations.

Product Comparison

Parameter

C1121-4P

C1111-4P

C1121-4PLTEP

Series

ISR 1000

ISR 1000

ISR 1000

LAN Ports

4 × GE

4 × GE

4 × GE

WAN Ports

2 × GE (1 RJ-45 + 1 combo SFP)

2 × GE (1 RJ-45 + 1 combo SFP)

2 × GE (1 RJ-45 + 1 combo SFP)

LTE Support

No

No

Yes (Pluggable LTE)

PoE Options

Optional (2 PoE/1 PoE+)

Optional (2 PoE/1 PoE+)

Optional (2 PoE/1 PoE+)

DRAM / Flash

4 GB / 4 GB

4 GB / 4 GB

4 GB / 4 GB

Max Encrypted Throughput

370 Mbps

370 Mbps

370 Mbps

Console Ports

Micro-USB

RJ-45 / Micro-USB

Micro-USB

Weight

1.55 kg

1.98 kg

1.68 kg

Dimensions (H×W×D)

1.65 × 10.80 × 7.85 in

1.75 × 12.70 × 9.03 in

1.65 × 10.80 × 7.85 in

Min. IOS XE Version

17.2.1

16.6.1

17.2.1

Specifications

Parameter Details
Product Model C1121-4P
Series Cisco ISR 1000 Series
LAN Ports 4 × Gigabit Ethernet (RJ-45)
WAN Ports 2 × Gigabit Ethernet (1 RJ-45 + 1 combo SFP)
Performance 370 Mbps IPsec throughput (IMIX)
SD-WAN IPsec Throughput 338 Mbps (IMIX)
Console Ports Micro-USB
DRAM / Flash 4 GB / 4 GB
Dimensions (H × W × D) 1.65 × 10.80 × 7.85 in
Weight 3.43 lb (1.55 kg)
Operating Temperature 0° to 40°C
Power Supply 66W AC (115W optional for PoE)
PoE Support Optional 2 × PoE or 1 × PoE+
Minimum IOS XE Version 17.2.1
Compliance UL, EN, IEC, FCC Class B

Get More Information

Discover unbeatable prices and fast shipping for the C1121-4P Access the detailed C1121-4P datasheet and ensure you’re getting the best deal with our reliable delivery service. Need assistance? Our free live chat support is here to help. For more information about the product and pricing, contact us via Live chat or email us at [email protected]

Quality Certifications

Customer Reviews

Write A Review
5.0
(4 reviews)
5 Stars
4
4 Stars
0
3 Stars
0
2 Stars
0
1 Stars
0
    Edward Buck
    Posted on 15/08/2024
    Verified Buyer
    5.0

    Solid router. Drops into the rack and just works. Delivery was on point.

    Supply Dept
    Posted on 02/05/2024
    Verified Buyer
    5.0

    Consistent packaging and documentation. Makes rollout easy.

    Retail IT
    Posted on 22/03/2024
    Verified Buyer
    5.0

    Deploying these to 50 stores. Batch order was handled professionally.

    Ops Manager
    Posted on 28/11/2023
    Verified Buyer
    5.0

    Needed a reliable edge router. This fits the bill. Good vendor support.

Questions & Answers

  • What is Cisco C1121-4P used for?

    A compact 4-port PoE/PoE+ branch router handling WAN, routing, and power for a few endpoints. Perfect for small offices, kiosks, and remote rooms where simplicity and reliability matter.

  • How does it differ from C1121-4PLTEP?

    The 4P model lacks integrated LTE. Use it when wired WAN is reliable and you don’t need built-in cellular. You can still add an external LTE modem for backup if desired.

  • Does it support VPN and firewall?

    Yes. It runs IOS XE with IPsec VPN and zone-based firewall capabilities, giving secure site-to-site or hub-and-spoke connectivity with granular policy control.

  • What PoE use cases are typical?

    Power a phone, an AP, and perhaps a compact camera directly from the router. For larger PoE loads, attach a Catalyst PoE access switch downstream.

  • Is there a simple way to configure?

    Yes. Use the web device manager for quick setup; CLI/NETCONF work for standardized templates, and telemetry/streaming provide operational visibility.

  • Can this router be part of SD-WAN later?

    Yes, with the correct licensing you can onboard it into a Cisco SD-WAN fabric, keeping existing IP addressing while gaining centralized policy.

  • How should I segment the LAN?

    Create staff, POS, and guest VLANs; apply ACLs and 802.1X to control access. QoS can prioritize voice or critical application traffic.

  • What’s a common migration path?

    If more ports or PoE are required, add a Catalyst switch; if LTE is needed, consider moving to an LTEP model or adding an external modem.

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Resources Downloads

  • C1121-4P Datasheet

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