Ubiquiti Networks UniFi Network Flex

multiple revisions of this device, use caution

Indoor/Outdoor 5-Port Gigabit Switch w/ PoE Support
Homepage	Product page
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Supported
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	Ubiquiti Networks UniFi Network Flex (USW-Flex)
CPU1 Y	MediaTek MT7621DAT
CPU1 Type	MIPS 1004Kc
CPU1 Speed	880 MHz ( 2 cores ) 16-bit
Bus	16-bit
Flash1 Chip	Macronix MX25L12835FMI
Flash1 Size	16 MiB 16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br /> (NOR)
RAM1 Size	128 MiB 134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br /> (DDR3)
RAM1 Chip	MediaTek MT7621DAT
ETH chip1	MediaTek MT7621DAT
Switch	MediaTek MT7621DAT
Ethernet Port Count	5-1GbE
Ethernet connector	8P8C
Wired Standard	IEEE 802.3i/3u/3ab
Auto-MDIX	supported
Jumbo frame	unspecified
Switch Class	managed
Ethernet OUI: F4:92:BF
Expansion IF types	none specified
PoE	802.3bt, standard
Power	48 VDC, 1.25 A
Connector type	PoE-PD
Other
Flags: PoE in/out, PoE switch
3rd Party Firmware Support	OpenWrt • (List | Dev | DLs)
Additional chips 802.3bt PoE High-Power PD Interface;TI;TPS2373;;1; 4-Port 802.3at PoE Manager;Microchip;PD69104B1;;1;
Retail
(Est.) release date	September 2019
UPC	817882027595 (UPC DB, On eBay)
ASIN	B07XL4DHZN
Country of manuf	China
Switch brand Switch2 brand Ubiquiti Networks UniFi Network Flex MediaTek Ubiquiti Networks UniFi Network Flex Mini Realtek Realtek Ubiquiti Networks UniFi Network FlexHD

For a list of all currently documented MediaTek chipsets with specifications, see MediaTek.

For a list of all currently documented Ubiquiti Networks devices with specifications, see Ubiquiti Networks.

Overview

Specifications

• Processor: MediaTek MT7621AT @880MHz

MIPS 1004Kc (Dual Core/Quad Thread)

• Flash: 16MB (NOR) Flash
• Memory: 128MB (DDR3) RAM (on-chip)
• LAN: 4x Gigabit (RJ45) 802.3af PoE,

1x Gigabit (RJ45) ports

10Gbps Switching Capacity

• PoE: 802.3af (PoE), 46W PoE budget
• Power: 802.3bt, 802.3at, or 60W PoE adapter

Flashing

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)

Target: ramips
Subtarget: mt7621
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 22.03.0
Current supported version: 25.12.2

LAN Hardware: MediaTek MT7621AT
WLAN Comment: No WLAN
Installation method(s):
see git-commit
Recovery method(s):
see git-commit
Comment:
install the "poemgr" package from the packages feed to control PoE

git • >>

ramips: add support for Ubiquiti USW-Flex Hardware -------- MediaTek MT7621AT 16M SPI-NOR Macronix MX25L12835FMI Microchip PD69104B1 4-Channel PoE-PSE controller TI TPS2373 PoE-PD controller PoE-Controller -------------- By default, the PoE outputs do not work with OpenWrt. To make them output power, install the "poemgr" package from the packages feed. This package can control the PD69104B1 PSE controller. Installation ------------ 1. Connect to the booted device at 192.168.1.20 using username/password "ubnt" via SSH. 2. Add the uboot-envtools configuration file /etc/fw_env.config with the following content $ echo "/dev/mtd1 0x0 0x1000 0x10000 1" > /etc/fw_env.config 3. Update the bootloader environment. $ fw_setenv boot_openwrt "fdt addr \$(fdtcontroladdr); fdt rm /signature; bootubnt" $ fw_setenv bootcmd "run boot_openwrt" 4. Transfer the OpenWrt sysupgrade image to the device using SCP. 5. Check the mtd partition number for bs / kernel0 / kernel1 $ cat /proc/mtd 6. Set the bootselect flag to boot from kernel0 $ dd if=/dev/zero bs=1 count=1 of=/dev/mtdblock4 7. Write the OpenWrt sysupgrade image to both kernel0 as well as kernel1 $ dd if=openwrt.bin of=/dev/mtdblock6 $ dd if=openwrt.bin of=/dev/mtdblock7 8. Reboot the device. It should boot into OpenWrt. Restore to UniFi ---------------- To restore the vendor firmware, follow the Ubiquiti UniFi TFTP recovery guide for access points. The process is the same for the Flex switch.