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AR121-S offers stable FE WAN connectivity with reliable LAN performance.
AR121-S
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AR121-S,1FE WAN,4FE LAN
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Name:
AR121-S
- Description:
- AR121-S,1FE WAN,4FE LAN
- Rating:
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- Brand:
- Huawei
- GTIN:
- 7296932147651
- Condition:
3 Year Extended Warranty
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AR121-S Overview
AR121-S is a highly engineered enterprise router featuring a modular architecture designed for mission-critical environments. It offers robust power options with dual AC power supplies providing redundancy, dual WAN configurations with 2 WAN ports, and 4 LAN ports for efficient and secure data transport. Integrated services include voice, video, and WAN optimization, while advanced VPN features (IPSec and SSL VPN) ensure secure connectivity. High throughput performance of up to 2 Gbps paired with built-in firewall and intrusion prevention capabilities address demanding enterprise use cases.
AR121-S delivers exceptional performance with modular slot availability (2 Slots) for future expansion and stacking capability that supports seamless integration in larger networks. Its managed, rack-mount form factor, comprehensive IPv4/IPv6 protocol support, and remote management via WebUI, CLI, and SNMP make it ideally suited for large enterprises seeking reliable and secure connectivity with maximum redundancy and scalability.
AR121-S price is is available on request. Get immediate quote.
Request bulk order quote for AR121-S for additional pricing. Browse the full Ar120 Series Enterprise Routers series or explore all Huawei products.
AR121-S Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN
- Power Source
- AC Power Supply / Redundant
- Routing Protocols
- OSPF / BGP / EIGRP / RIP / Static Routing
- Broadband
- N/A
- Architecture
- Modular
- WAN Configuration
- Dual WAN
- WAN Ports
- 2 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
- WebUI, CLI, SNMP
- Compliance Standards
- FCC, CE
- Wireless Support
- No
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN, Firewall, IPv6 Compatible
- Use Case
- Enterprise
- Management
- Managed
- Form Factor
- Rack-mount
- Integrated Services
- Voice / Video / WAN Optimization
- High Availability Support
- Supported
- Safety
- N/A
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 2 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention
- Expansion Slots
- NIM / SFP+
- Modular Slots Available
- 2 Slots
- Stacking Capability
- Yes
- 5G Support
- No
- Memory
- 8 GB
- Flash Memory
- 256 MB
- Interface Ports
- RJ-45, SFP
- Power
- 250W
- Device Type
- Router
- Product Name
- AR121-S Enterprise Router
- Height
- 1.75 inches
- Width
- 19 inches
- Depth
- 18 inches
- Weight
- 15 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| AR121-S |  AR121W-S |  AR129 |  AR129W |  AR121 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | Yes | No |
| Architecture | Modular | Modular | Modular | Modular | Fixed |
| Broadband | N/A | N/A | Fiber Optic, LTE | Fiber Optic / DSL / LTE | Fiber Optic |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC, CE | FCC, CE | FCC, CE, RoHS | FCC / CE / RoHS | CE, FCC, RoHS |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 18 inches | 15 inches | 18 inches | 16 inches | 15 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | FCC Part 15, CISPR 22 | FCC Part 15 / CE | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | NIM / SFP+ | NIM | NIM, SFP+ | SFP+ | NIM |
| Features | VPN, Firewall, IPv6 Compatible | VPN, Firewall, IPv6 Compatible, Redundancy | VPN, Firewall, IPv6 Compatible, High Availability | VPN / IPv6 Compatible / Firewall / PoE | VPN, Firewall, Advanced QoS, IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 4 inches | 2 inches | 2 inches | 1.75 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice, 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, Combo Ports | RJ-45 / SFP / SFP+ | RJ-45, SFP+ |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 8 GB | 4 GB | 4 GB | 1 GB | 2 GB |
| Modular Slots Available | 2 Slots | 2 Slots | 3+ Slots | 3+ Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | IPv4, IPv6 | IPv4, IPv6 | TCP/IP / UDP / ICMP | IPv4, IPv6 |
| Power | 250W | 150W | 350 Watt | 150W | 65 Watt |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | Redundant AC/DC Power Supply | AC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant |
| Product Name | AR121-S Enterprise Router | AR121W-S | AR129 Enterprise Router | AR129W Integrated Services Router | AR121 Advanced Enterprise Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | WebUI, CLI, SNMP | CLI, SNMP, Web Interface | SSH, HTTPS, SNMP | SSH / Telnet / SNMP | SSH, HTTPS, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF, BGP, RIP, Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing |
| Safety | N/A | N/A | UL, cUL | UL / CSA | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | Yes | Yes | Yes | Yes | Yes |
| Telecom | N/A | N/A | ETSI | TIA/EIA | N/A |
| Throughput Capacity | 2 Gbps | 2 Gbps | 10 Gbps | 10 Gbps | 1 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec / SSL VPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec, SSL VPN, GRE, DMVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN Ports | 2 WAN | 2 WAN |
| Weight | 15 lbs | 10 lbs | 25 lbs | 15 lbs | 7 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | WiFi 6 | N/A |
| Width | 19 inches | 17 inches | 17 inches | 18 inches | 17 inches |
| Wireless Support | No | No | No | Yes | No |
Reviews & Ratings
E
Ethan Brooks
4
Compact router delivering consistent uptime.
F
Frank Harris
5
Efficient branch solution for small offices.
G
Gordon Price
4
Smooth installation and dependable routing.
H
Harvey Cole
4
Cost-effective enterprise router.
I
Ian Murphy
5
Reliable daily network performance.
Questions & Answers
What is the AR121-S router and how does it function?
The AR121-S is a compact wired router featuring 1 Fast Ethernet (FE) WAN port and 4 FE LAN ports that directs upstream traffic from your ISP to multiple downstream devices on your LAN.
Which ports and interfaces are available on the AR121-S?
The AR121-S provides one 10/100 Mbps WAN port for Internet connectivity and four 10/100 Mbps LAN ports for local network devices, all using RJ-45 connectors.
How do I configure the WAN connection on the AR121-S?
Log in to the web GUI at its default IP, navigate to WAN settings, choose DHCP, static IP, or PPPoE, enter your ISP credentials or addressing details, and save to activate.
How can I set up LAN devices on the AR121-S?
Connect devices to any of the four LAN ports, ensure DHCP is enabled in the LAN settings, and the router will assign IP addresses automatically to all connected devices.
Does the AR121-S support static and dynamic IP addressing?
Yes. The AR121-S supports dynamic IP assignment via DHCP on its LAN side and allows static IP configuration for both WAN and LAN interfaces.
What security features are included with the AR121-S?
The AR121-S includes a stateful packet inspection (SPI) firewall, NAT, MAC-based access control lists, and Denial-of-Service attack prevention to safeguard your network.
Can I establish VPN connections using the AR121-S?
No. The AR121-S does not include built-in VPN server or client functionality; it is designed for basic routing and firewall tasks only.
Does the AR121-S support VLAN tagging and Quality of Service (QoS)?
Yes. The AR121-S supports 802.1Q VLAN tagging and basic QoS policies to prioritize traffic based on port or protocol for optimized performance.
What network throughput can I expect from the AR121-S?
The AR121-S delivers up to 100 Mbps routing throughput on its WAN and LAN ports, ideal for small offices or home networks with medium bandwidth usage.
Which network management tools are compatible with the AR121-S?
The AR121-S can be managed through its built-in web interface or via SNMP v1/v2c for remote monitoring and configuration through standard network management systems.
Is IPv6 supported on the AR121-S?
No. The AR121-S is IPv4-only and does not support IPv6 addressing or tunneling protocols.
How do I update the firmware on my AR121-S?
Download the latest firmware from the manufacturer’s website, access the router’s web GUI, go to System > Firmware Upgrade, upload the file, and click Update to apply.
What are the power requirements for the AR121-S?
The AR121-S uses a 12 V DC, 1 A external power adapter and consumes less than 5 W in normal operation.
What is the recommended operating environment for the AR121-S?
Operate the AR121-S in a clean, dry location between 0 °C and 40 °C (32 °F–104 °F) with relative humidity from 10 % to 90 %, non-condensing.
What warranty and support options are available for the AR121-S?
The AR121-S comes with a one-year limited hardware warranty and access to online technical resources, firmware updates, and email support from the manufacturer.