C1121-4P
4 x 10/100/1000BASE-T RJ-45 switched LAN ports
C1121X-8P
8 x 10/100/1000BASE-T RJ-45 switched LAN ports
Cisco router comparison
C1121-4P vs C1121X-8P
C1121-4P provides four switched LAN ports and 4 GB of DRAM and storage. C1121X-8P doubles the switched LAN count to eight, increases memory and storage to 8 GB, and publishes higher IPv4 IMIX and encrypted-throughput results. Select the X model when local port density or performance requires it, then confirm the PoE-capable external power adapter.
2models compared
43specs shown for every model
13differences found
Change comparison
Select different models
At-a-glance comparison
Key performance and configuration differences
Start with the differences that have the greatest effect on capacity, connectivity, software, power and deployment fit.
C1121-4P
6
C1121X-8P
10
C1121-4P
1,372 Mbps
C1121X-8P
1,673 Mbps
C1121-4P
1.426 Gbps
C1121X-8P
1.889 Gbps
C1121-4P
0.338 Gbps
C1121X-8P
0.465 Gbps
C1121-4P
0.37 Gbps
C1121X-8P
0.468 Gbps
Buying decision
How to choose between C1121-4P and C1121X-8P
Review the differences in this order to identify the model that best fits the intended deployment.
-
01
Traffic and deployment role
Size the platform for the branch, aggregation or edge role using the Cisco throughput metric that matches the planned traffic mode.
-
02
Interfaces and expansion
Confirm built-in WAN media and speeds, then check NIM, SM-X or other module support for current and future circuits.
-
03
Software, licensing and power
Verify SD-WAN or routing software, subscriptions, memory, storage and the required power-redundancy design.
Before ordering
Confirm the exact Product ID, license tier, power supplies, accessories and regional requirements.
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Need help deciding between these Cisco models?
Send your port, performance, license, quantity or deployment requirements. A CCIE-level network engineer will review the shortlist and help identify the better-fit Product ID.
Detailed comparison
Full specification comparison
| Comparison parameter | ||
|---|---|---|
| Product ID | C1121-4P | C1121X-8P |
| Product and ordering | ||
| Product Type | Cisco 1000 Series Integrated Services Router | Cisco 1000 Series Integrated Services Router |
| Form Factor | Desktop fanless router | Desktop fanless router |
| Router Role | Small-branch integrated services router | Small-branch integrated services router |
| Routing and WAN performance | ||
| Configurable Ethernet Ports | 1 x 1G RJ-45 plus 1 x 1G SFP/RJ-45 combo | 1 x 1G RJ-45 plus 1 x 1G SFP/RJ-45 combo |
| Configurable Ethernet Port Count | 2 | 2 |
| Integrated LAN Switch Ports | 4 x 10/100/1000BASE-T RJ-45 switched LAN ports | 8 x 10/100/1000BASE-T RJ-45 switched LAN ports |
| Integrated LAN Port Count | 4 | 8 |
| Built-in 1GE Ports | 6 | 10 |
| Built-in 10GE Ports | 0 | 0 |
| Expansion Slots | No modular slots | No modular slots |
| NIM Slots | Not applicable | Not applicable |
| SM-X Slots | Not applicable | Not applicable |
| Service Module Support | Not applicable | Not applicable |
| Ports and interfaces | ||
| Management Ports | Management through routed Ethernet; no dedicated management Ethernet port | Management through routed Ethernet; no dedicated management Ethernet port |
| Console Ports | Micro-USB console; RJ-45 console on supported 8-port models | Micro-USB console; RJ-45 console on supported 8-port models |
| Performance and scale | ||
| IPv4 IMIX Platform Throughput | 1,372 Mbps | 1,673 Mbps |
| SD-WAN IPsec Throughput (1400-byte) | 1.426 Gbps | 1.889 Gbps |
| SD-WAN IPsec Throughput (IMIX) | 0.338 Gbps | 0.465 Gbps |
| Autonomous IPsec Throughput (1400-byte) | 0.37 Gbps | 0.468 Gbps |
| SD-WAN Overlay Tunnels | 200 | 200 |
| Configuration, licensing and management | ||
| Routing Protocols | Static routing, BGP, OSPF, EIGRP, IS-IS, RIP and VRF-Lite | Static routing, BGP, OSPF, EIGRP, IS-IS, RIP and VRF-Lite |
| Management Model | Cisco Catalyst SD-WAN Manager, Cisco Catalyst Center, WebUI, CLI and SNMP | Cisco Catalyst SD-WAN Manager, Cisco Catalyst Center, WebUI, CLI and SNMP |
| Licensing | Cisco Smart Licensing with Network and security feature tiers | Cisco Smart Licensing with Network and security feature tiers |
| Required Subscription | Cisco DNA subscription required for SD-WAN; autonomous routing can be licensed separately | Cisco DNA subscription required for SD-WAN; autonomous routing can be licensed separately |
| USB Ports | 1 x USB 3.0 Type-A host port | 1 x USB 3.0 Type-A host port |
| Memory and software | ||
| Default DRAM | 4 GB | 8 GB |
| Maximum DRAM | 4 GB | 8 GB |
| Storage | 4 GB | 8 GB |
| Operating System | Cisco IOS XE autonomous or SD-WAN software | Cisco IOS XE autonomous or SD-WAN software |
| Minimum Software Release | Cisco IOS XE SD-WAN 17.2.1 | Cisco IOS XE SD-WAN 17.2.1 |
| PoE and power | ||
| Integrated PoE Support | Optional PoE/PoE+ on integrated LAN ports with the required high-power adapter | Optional PoE/PoE+ on integrated LAN ports with the required high-power adapter |
| Default PoE Budget | 0 W | 0 W |
| Default Power Supply | 66W external AC adapter; 115W adapter for PoE | 66W external AC adapter; 150W adapter for PoE |
| Power Redundancy | No power-supply redundancy | No power-supply redundancy |
| Physical and environmental | ||
| Dimensions (H × W × D) | 41.9 × 274.3 × 199.4 mm | 41.9 × 274.3 × 199.4 mm |
| Weight | 1.55 kg | 1.58 kg |
| Operating Temperature | 0 to 40 °C | 0 to 40 °C |
| Storage Temperature | -40 to 70 °C | -40 to 70 °C |
| Storage Humidity | 5% to 95% | 5% to 95% |
| Operating Humidity | 5% to 95% | 5% to 95% |
| Operating Altitude | 0–3,050 m | 0–3,050 m |
| MTBF | 680,590 hours | Not published by Cisco |
| Warranty | Cisco 1-year limited hardware warranty | Cisco 1-year limited hardware warranty |
“Not listed” means that no confirmed value is currently available for that model and parameter.
Price, stock & lead time
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