ZyXEL Keenetic Extra II

abgn+ac (AC1200)
ZyXEL Keenetic Extra II Internet Center
Wikipedia	ZyXEL
WikiDevi.wi-cat.ru	ZyXEL Keenetic Extra II
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Supported
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	ZyXEL Keenetic Extra II
FCC ID	none specified
Type	wireless router
CPU1 Y	MediaTek MT7628AN
CPU1 Type	MIPS 24KEc
CPU1 Speed	580 MHz
Flash1 Chip	Winbond W25Q256
Flash1 Size	32 MiB 33,554,432 B <br />262,144 Kib <br />32,768 KiB <br />256 Mib <br />0.0313 GiB <br />
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 />
RAM1 Chip	ESMT M14D1G1664A
ETH chip1	MediaTek MT7628AN
Switch	MediaTek MT7628AN
Ethernet Port Count	1-100MbE-WAN 4-100MbE-LAN
Wired Standard	IEEE 802.3i/3u
802dot11 OUI: none specified
Stock bootloader	U-Boot
Stock FW OS	Linux
Expansion IF types	USB 2.0
USB ports	1
USB Hub Compatible	Untested
Power	? VDC, ? A
Connector type	barrel
Serial Port (UART)	yes, 4-pin header, (115200 8N1)
Other
Default IP address: 192.168.1.1 the IP 192.168.1.1 is used by 1359 additional devices of which 100 are ZyXEL devices Default login user: admin Default login password: 1234 admin:1234 credentials used by 190 additional devices of which 68 are ZyXEL devices
3rd Party Firmware Support	OpenWrt • (List | Dev | DLs)
Retail
Availability	End of Life
Country of manuf	China
Radio 1
Chip1	MediaTek MT7628AN
Wireless interface OUI	none specified
Antenna Connector Type	none specified
MIMO status	2x2:2
Wireless Standard	IEEE 802.11b/g/n
802.11n	up to 300 Mbps
802.11g	up to 54 Mbps
802.11b	up to 11 Mbps
WiFi Operating Frequency	2.4 GHz
Radio 2
Chip1	MediaTek MT7612EN
Wireless interface OUI	none specified
Antenna Connector Type	none specified
MIMO status	2x2:2
Wireless Standard	IEEE 802.11a/n/ac
802.11ac	up to 867 Mbps
802.11n	up to 300 Mbps
802.11a	up to 54 Mbps
WiFi Operating Frequency	5 GHz

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

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

• 300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.),

• 867 Mbps - 2SS 5GHz 802.11ac (80MHz chan.) = AC1200 class

Overview

4x LED, 3x Button

Flashing

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)

Target: ramips
Subtarget: mt76x8
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 19.07.0
Current supported version: 25.12.2

LAN Hardware: MediaTek MT7628AN
WLAN Hardware: MediaTek MT7628AN, MediaTek MT7612EN
WLAN Comment: 2x2:2 MIMO both channels
Installation method(s):
U-Boot TFTP recovery, see git-commit
Install Comment:
For TFTP, rename -factory.bin image to kextra2_recovery.bin
Recovery method(s):
U-Boot TFTP recovery
Recovery Comment:
For TFTP, rename -factory.bin image to kextra2_recovery.bin

git • >>

ramips: add support for ZyXEL Keenetic Extra II Specification: - System-On-Chip: MT7628N/N - CPU/Speed: 580 MHz - Flash-Chip: Winbond w25q256 - Flash size: 32768 KiB - RAM: 128 MiB - 5x 10/100 Mbps Ethernet - 4x external, non-detachable antennas - UART (J1) header on PCB (57600 8n1) - Wireless No1 (2T2R): SoC-integrated: MT7628N 2.4GHz 802.11bgn - Wireless No2 (2T2R): On-board chip: MT7612EN 5GHz 802.11ac - USB: Yes 1 x 2.0 - 4x LED, 3x button The device supports dual boot mode. So we use only first half of flash. Flash instruction: The only way to flash OpenWrt image is to use tftp recovery mode in U-Boot: 1. Configure PC with static IP 192.168.1.2/24 and tftp server. 2. Rename "openwrt-ramips-mt76x8-zyxel_keenetic-extra-ii-squashfs-factory.bin" to "kextra2_recovery.bin" and place it in tftp server directory. 3. Connect PC with one of LAN ports, press the reset button, power up the router and keep button pressed until power led start blinking. 4. Router will download file from server, write it to flash and reboot.