United States$5,000,000+
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Kevin Marshall Jr
5
Compact ISR router with solid performance. Easy to deploy for branch connectivity.
C1121-4P
ISR 1100 4P DUAL GE SFP ROUTER
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Name:
C1121-4P
- Description:
- ISR 1100 4P DUAL GE SFP ROUTER
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 889728357272
- Condition:
- Warranty:
- 3
- List Price:
$1,058.00
- Price:
$580.0045.2% off
Quantity:
1
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C1121-4P Overview
C1121-4P is a fixed enterprise router built with robust design and integrated services that include voice and video, offering secure VPN features such as IPSec and SSL VPN to support seamless remote connectivity. It is designed with a single WAN port and four LAN ports that support 10/100/1000 Ethernet technology, along with advanced remote management capabilities via SSH, HTTPS, and SNMP.
Featuring an AC power supply and inherent high availability support, the C1121-4P delivers reliable throughput capacity of 250 Mbps while ensuring performance and redundancy. Its modular form factors and integrated PoE abilities make it an ideal choice for enterprise and business use cases where enhanced security, QoS features, and built-in firewall, intrusion prevention, and malware protection are critical.
C1121-4P price is $580.00, a 45.2% saving from the Cisco list price of $1,058.00. C1121-4P is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1121-4P for additional pricing. Browse the full Router Isr 1100 series or explore all Cisco products.
C1121-4P Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN
- Power Source
- AC Power Supply
- Routing Protocols
- OSPF / BGP / EIGRP / Static Routing
- Broadband
- N/A
- Architecture
- Fixed
- WAN Configuration
- WAN
- WAN Ports
- 1 WAN
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100/1000
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired
- Network Protocols
- IPv4 / IPv6
- Remote Management
- SSH / HTTPS / SNMP
- Compliance Standards
- FCC / CE
- Wireless Support
- No
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN / IPv6 Compatible / Firewall / PoE
- Use Case
- Enterprise / Business
- Management
- Managed
- Form Factor
- Desktop
- Integrated Services
- Voice / Video
- High Availability Support
- Supported
- Safety
- UL Listed
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 250 Mbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention / Malware Protection
- Expansion Slots
- N/A
- Modular Slots Available
- N/A
- Stacking Capability
- No
- 5G Support
- No
- Memory
- 512 MB
- Flash Memory
- 256 MB
- Interface Ports
- RJ-45
- Power
- 30 W
- Device Type
- Router
- Product Name
- C1121-4P Integrated Services Router
- Height
- 1.7 inches
- Width
- 9.0 inches
- Depth
- 7.6 inches
- Weight
- 7 lbs
C1121-4P Use Case
Secure Branch Office Connectivity with C1121-4P-ISR 1100 4P DUAL GE SFP ROUTER
In a multi-site enterprise, the C1121-4P-ISR 1100 4P DUAL GE SFP ROUTER delivers encrypted DMVPN tunnels over dual GE SFP links to secure voice, video and data between HQ and remote branches. Benefit: Achieve sub-millisecond failover, centralized policy enforcement and 99.99% uptime for uninterrupted business continuity.
High-Performance Retail Edge Deployment with Integrated PoE and Fiber Uplink
A national retailer leverages the C1121-4P-ISR 1100 4P DUAL GE SFP ROUTER to power IoT sensors, digital signage and Wi-Fi access points via four PoE ports while aggregating traffic over a GE SFP fiber uplink. Benefit: Simplified network footprint, faster checkout experiences and scalable roll-out across hundreds of stores.
Industrial SCADA Monitoring over Resilient Fiber and Ethernet
In manufacturing plants and energy substations, the C1121-4P-ISR 1100 4P DUAL GE SFP ROUTER connects SCADA controllers and IP cameras on PoE ports with redundant fiber uplink on dual GE SFP interfaces. Benefit: Secure, low-latency telemetry, remote diagnostics and rapid deployment in harsh environments.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 C1121-4P |  C1111-8PLTELAWH |  C1113-8PM |  C1111-8PLTELAWA |  C1109-2PLTEGB | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Modular | Fixed | Fixed |
| Broadband | N/A | LTE | Fiber Optic | LTE | LTE |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC / CE | IEEE 802.3, IEEE 802.1Q | RoHS, FCC, CE | FCC / CE / RoHS |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 7.6 inches | N/A | 18 inches | 16.9 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | FCC / CE | N/A | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | N/A | SFP+ | NIM | NIM, SFP+ | SFP+ |
| Features | VPN / IPv6 Compatible / Firewall / PoE | VPN / IPv6 Compatible / Firewall / MPLS | VPN / Firewall / POE / IPv6 Compatible | VPN, Firewall, IPv6 Compatible, POE | VPN / Firewall / Integrated LTE |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 512 MB | 512 MB | 256 MB |
| Form Factor | Desktop | Desktop | Rack-mount | Rack-mount | Desktop |
| Height | 1.7 inches | N/A | 1.75 inches | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video | Voice / Video | Voice / WAN Optimization | Voice, Video | Voice |
| Interface Ports | RJ-45 | RJ-45 / SFP | RJ-45 / SFP | RJ-45, SFP+ | RJ-45 / SFP |
| LAN Ports | 4 LAN Ports | 8 LAN Ports | 8 LAN Ports | 8 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 512 MB | 1 GB | 2 GB | 4 GB | 1 GB |
| Modular Slots Available | N/A | N/A | 3+ Slots | N/A | N/A |
| Network Protocols | IPv4 / IPv6 | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6 | IPv4 / IPv6 |
| Power | 30 W | 65 Watt | 65 Watt | 65 Watt | 45 Watt |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | Dual AC/DC with Redundancy |
| Product Name | C1121-4P Integrated Services Router | Cisco C1111-8PLTELAWH Integrated Services Router | C1113-8PM | Cisco C1111-8PLTELAWA Integrated Services Router | C1109-2PLTEGB |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / HTTPS / SNMP | CLI / SNMP / NetConf | SSH / Telnet / SNMP | SSH, HTTPS, SNMP | SSH / HTTPS / SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / Static Routing |
| Safety | UL Listed | N/A | FCC / CE | N/A | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | Yes | Yes | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 250 Mbps | 1.2 Gbps | 1 Gbps | 2 Gbps | 1 Gbps |
| Use Case | Enterprise / Business | Enterprise | Enterprise | Enterprise | Enterprise / Industrial |
| VPN Support | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / GRE | IPSec / SSL VPN | IPSec / SSL VPN |
| WAN Configuration | WAN | WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 1 WAN | 1 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 7 lbs | N/A | 15 lbs | 10 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 9.0 inches | N/A | 17.5 inches | 16.9 inches | N/A |
| Wireless Support | No | No | No | No | No |
Reviews & Ratings
R
Ryan Whitfield Jr
4
Reliable routing and WAN performance. Meets small office needs well.
S
Scott Bennett Jr
4
Cisco ISR 1100 series stability with simple management.
O
Oliver Grant Jr
5
Good balance of features and performance for branches.
D
Derek Lawson Jr
5
Straightforward setup and dependable operation.
Questions & Answers
What are the key features of the Cisco ISR 1100 4P Dual GE SFP Router (C1121-4P)?
The Cisco ISR 1100 4P Dual GE SFP Router (C1121-4P) delivers four Gigabit Ethernet LAN ports with PoE, two dual-rate GE SFP WAN slots, integrated security, up to 50 Mbps aggregate throughput and Cisco IOS XE software.
What is the maximum throughput of the C1121-4P router?
The C1121-4P provides up to 50 Mbps aggregate throughput with the default performance license and can be upgraded to 100 Mbps via an optional throughput license.
How many LAN and WAN interfaces does the ISR 1100 4P offer?
The router includes 4× 10/100/1000 PoE-capable LAN ports and 2× dual-rate GE SFP WAN slots, plus an additional onboard 10/100/1000 uplink port for flexible deployment.
Does the C1121-4P support dual GE SFP ports for fiber connectivity?
Yes, the ISR 1100 4P features two dual-rate GE SFP slots for single-mode or multimode fiber uplinks, enabling high-availability and extended-reach connections.
What security features are integrated into the Cisco ISR 1100 4P router?
It includes Cisco IOS XE Zone-Based Firewall, VPN (IPsec and GRE), content filtering, intrusion prevention (IOS IPS), and secure boot to protect branch networks.
Which Cisco IOS software editions are supported by the C1121-4P?
The router runs Cisco IOS XE Universal image with LTE, security, routing, and SD-WAN feature sets, supporting field-upgradable software licensing.
Is the ISR 1100 4P suitable for small branch and retail deployments?
Yes, its compact form factor, integrated security, PoE support and optional 4G/5G USB modem make it ideal for small offices, retail stores and kiosks.
What power supply options are available for the C1121-4P?
The ISR 1100 4P supports external AC adapters (100–240 VAC) and offers PoE (up to 60 W total) on LAN ports to power IP phones and cameras.
Can the Cisco ISR 1100 4P be managed via Cisco DNA Center?
Yes, it integrates with Cisco DNA Center and Cisco SD-WAN vManage for centralized policy, automation, analytics and zero-touch provisioning.
What warranty coverage does the C1121-4P router include?
Cisco provides a limited one-year hardware warranty with next-business-day replacement; optional Smart Net Total Care service extends support and software updates.
What are the physical dimensions and weight of the ISR 1100 4P?
The C1121-4P measures 196 mm × 135 mm × 34 mm (7.7″ × 5.3″ × 1.3″) and weighs 0.41 kg (0.9 lb), fitting easily on a desktop or wall mount.
Does the C1121-4P support Cisco SD-WAN?
Yes, the ISR 1100 4P is Cisco SD-WAN ready, supporting secure overlay WAN connectivity, application-aware routing and centralized orchestration.
How does the Cisco ISR 1100 4P implement Quality of Service (QoS)?
It leverages Cisco IOS XE QoS features—class-based shaping, policing, priority queuing and NBAR traffic classification—to ensure application performance.
What environmental conditions does the C1121-4P support?
Operating temperature ranges from 0 °C to 40 °C (32 °F to 104 °F) with 5% to 95% non-condensing humidity, suitable for standard indoor branch environments.
How does the dual GE SFP feature enhance network reliability?
Dual GE SFP slots support link redundancy and diverse fiber paths, ensuring uninterrupted WAN connectivity and fast recovery in case of link failure.
What are the recommended use cases for the Cisco ISR 1100 4P Dual GE SFP Router?
Ideal for small branch offices, retail outlets, kiosks and IoT gateways, the C1121-4P secures and manages applications while delivering reliable WAN access.