TP-Link Archer AX21: OpenWrt Compatibility Report

TP-Link Archer AX21 router
Image: OpenWrt Table of Hardware, CC BY-SA 4.0

The TP-Link Archer AX21 runs OpenWrt 25.12.5 on the ramips/mt7621 target. Its WiFi 6 (AX) wireless on the mt76 driver rates good for open-source driver support (0.80/1.0), installation is rated easy, and it is no longer sold new.

Drivers: Good (0.80) WiFi 6 (AX) Install: easy

Hardware data and retail listings last checked .

Discontinued. This model is no longer sold new, so this page is kept as a reference for people who already own one. See current alternatives.

Where to buy

We have no current retail listing for the TP-Link Archer AX21, which is no longer sold new. See current alternatives for devices you can still buy today.

Specifications

SoC MediaTek MT7621DAT
CPU 2 cores @ 880 MHz
RAM 128 MB
Flash 16 MB
Ethernet ports 5
WiFi generation WiFi 6 (AX)
Radios 2.4GHz: b/g/n/ax · 5GHz: a/n/ac/ax
WLAN hardware MediaTek MT7905, MediaTek MT7975
WLAN driver mt76
OpenWrt target ramips / mt7621
Package architecture mipsel_24kc
Current release 25.12.5
Install method GUI OEM, U-Boot web recovery
Install difficulty easy
Power supply 12 VDC, 1.5 A
Device type Home router
Estimated throughput 220 Mbps
Availability discontinued

Installing OpenWrt on the Archer AX21

Installation on this device is rated easy. You can flash it from the stock web interface without opening the case or using a serial cable. Documented methods: GUI OEM, U-Boot web recovery.

Flashing third-party firmware can brick a router and usually voids the warranty. Always check that the firmware image matches your exact hardware version.

Still sold and well supported

Sinovoip Banana Pi BPi-R3 Mini

WiFi 6 (AX) Drivers: Excellent $109

Huasifei WH3000

WiFi 6 (AX) Drivers: Excellent

GL.iNet GL-MT6000 (Flint 2)

WiFi 6 (AX) Drivers: Excellent $170

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