The TP-Link Archer AX21 remains relevant because many homes need dependable basic connections more than the latest Wi-Fi generation. Its dual-band Wi-Fi 6 and four Gigabit LAN ports cover a familiar mix of phones, computers, televisions and consoles without requiring a more elaborate network.
The current purchase option is the V5 hardware version. That distinction matters with this long-running model: features mentioned in older AX21 reviews do not all carry over, particularly USB storage support.
Design and Configuration
- Current V5 hardware
- Four external antennas
- 261.1 × 134.5 × 41 mm
The AX21 is a conventional flat Black router with four fixed antennas. The body is about 10.3 inches wide, so allow shelf space for the antennas as well as the case. It includes a power adapter and Ethernet cable, and connects to the modem or other Ethernet handoff required by your Internet service.
TP-Link has sold several AX21 hardware versions. Earlier V1 documentation includes a USB 2.0 port for file sharing; the current V5 specification and port diagram do not. If you are replacing an older AX21 that serves a shared USB drive, this version will not preserve that arrangement. Use the version on the unit’s label when choosing firmware.
- Wi-Fi 6
- 2.4 GHz and 5 GHz
- Up to 80 MHz on 5 GHz
The two bands serve different everyday needs. Nearby laptops and phones can use 5 GHz, while 2.4 GHz remains useful for many smart-home devices and connections that must travel farther. The router supports older Wi-Fi equipment too, although Wi-Fi 6 features require compatible clients.
The 1.8 Gb/s rating combines the two radios’ advertised limits. A single device does not receive that combined rate, and the Gigabit Internet port sets a separate limit. There is no 6 GHz radio or 160 MHz channel option, so this is a modest connection upgrade rather than a route to the widest channels available on newer hardware.
HighSpeedInternet.com’s August 2025 review measured 824 Mb/s at two feet and 428 Mb/s at 40 feet on 5 GHz, using an iPhone 12 Pro Max, an 80 MHz channel and a local test server. The longer path crossed a glass door and an exterior door.1 Its hardware revision was not specified, so those measurements describe its AX21 sample rather than establish identical V5 performance. They nevertheless illustrate why placement matters more than the combined rating.
Connectivity
- 1 × Gigabit WAN
- 4 × Gigabit LAN
- No USB on V5
Four LAN ports leave useful room for a desktop, television, console and another network device without immediately adding a switch. Wired connections can also take those devices off the shared wireless network.
Every Ethernet port is Gigabit. A faster broadband plan or 2.5-gigabit computer cannot make these ports run faster, so choose a router with faster connections if that is the purpose of the upgrade. For a plan below Gigabit and ordinary home equipment, the limit is often a reasonable tradeoff.
A network-attached storage device can connect over Ethernet, but a USB drive cannot plug directly into this version of the AX21. The absence is worth checking before buying accessories for a setup described in an older review.
Software and Security
- Tether app and browser management
- URL and time controls
- VPN client and server
The Tether app provides convenient phone management, while the browser interface offers another way to configure the router. Guest networks, device-based quality of service, access controls and the documented URL and time restrictions cover useful everyday tasks without requiring every user to become a network specialist.
Current US V5.6 documentation lists OpenVPN, WireGuard, PPTP and L2TP client and server support. A VPN client can send selected devices’ traffic to a remote service, while a server lets a remote device connect back home. These are different uses, and the connection still depends on compatible configuration at both ends.
A 2025 firmware release added a VPN kill switch. Update the appropriate hardware version before relying on it, and do not assume VPN transfers will approach the router’s normal wired speed. The specification describes supported connections, not measured encrypted throughput.
Mesh Networking
- EasyMesh compatibility
- Wired or wireless backhaul with supported devices
EasyMesh provides a way to extend coverage using compatible equipment. TP-Link’s current compatibility list includes the AX21 family with wired and wireless backhaul support, subject to the appropriate hardware and firmware. A wireless extension shares radio resources; Ethernet can provide a more predictable link where cabling is available.
Check the exact device combination before expanding. Archer EasyMesh and TP-Link Deco are separate mesh systems, even though they share a manufacturer. Adding a Deco unit does not turn this Archer into one coordinated Deco network.
Alternatives
The GL.iNet Flint 2 is worth comparing if you need faster wired connections or USB storage sharing. It offers two 2.5-gigabit ports, four Gigabit ports and USB 3.0, with more emphasis on configurable VPN use. The AX21 is easier to justify when those extra capabilities would go unused.
If your current router already supplies reliable coverage and the speeds you need, keeping it may be the best choice. Moving from another adequate Wi-Fi 6 router to this AX21 is not automatically a useful upgrade, and a difficult multi-floor coverage problem may call for a planned mesh system instead.
Verdict
The Archer AX21 V5 is a sensible fit for a basic home network whose requirements stay within Gigabit Ethernet and dual-band Wi-Fi 6. I would choose it for those needs, with the current hardware’s features clearly in mind. Look beyond it when faster ports, 6 GHz or direct USB storage are part of the plan.