Linksys EA7300 v2

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Gigabit Ethernet switch based device, USB 3.0 port, 2.4GHz and 5GHz WiFi support. The three antennas cannot be removed. Dual-firmware support allows to switch back to the stock firmware.

Generic Router

FIXME

  1. This is an empty template that suggests the information that should be present on a well-constructed Device Page. This means, that you have to fill it with life and information.
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  • Please include only model specific information, omit bla,bla and put everything generic into separate articles
  • If you have no time to write certain stuff, link to docs
  • base-system should lead the way, do not explain this again
  • DO NOT provide a complete howto here! Instead groom the general documentation.
ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
EA7300v2MediaTek MT7621AT880128NAND256MediaTek MT7603E, MediaTek MT7615Nb/g/na/n/ac-5-1x 3.0

Install OpenWrt (generic explanation)

Flash factory image through GUI.

This might fail due to the A/B nature of this device. When flashing, OEM firmware writes over the non-booted partition. If booted from 'A', flashing over 'B' won't work. To get around this, you should flash the OEM image over itself. This will then boot the router from 'B' and allow you to flash OpenWrt without problems.

After installation you will notice the device reverts back to the stock firmware after a few reboots. This is due to a problem where the bootcounter cannot be reset, see below.

Hard-reset the router three times to force it to boot from 'B.' This is where the stock firmware resides. To remove any traces of OpenWrt from your router simply flash the OEM image at this point.

FIXME Find out flash layout, then add the flash layout table here (copy, paste, modify the example).

Please check out the article Flash layout. It contains examples and explanations that describe how to document the flash layout.

FIXME The instructions below are for Broadcom devices and only serve as an example.
Remove / modify them if they do not apply to this particular device!

This section deals with

  • How you install OpenWrt from a device freshly opened
  • The steps required such as reset to factory defaults if the device has already been configured

Note: Reset router to factory defaults if it has been previously configured.

  • Browse to http://192.168.1.1/Upgrade.asp
  • Upload .bin file to router
  • Wait for it to reboot
  • Telnet to 192.168.1.1 and set a root password, or browse to http://192.168.1.1 if LuCI is installed.

Specific values needed for tftp

FIXME Enter values for “FILL-IN” below

Bootloader tftp server IPv4 address FILL-IN
Bootloader MAC address (special) FILL-IN
Firmware tftp image Latest OpenWrt release (NOTE: Name must contain “tftp”)
TFTP transfer window FILL-IN seconds
TFTP window start approximately FILL-IN seconds after power on
TFTP client required IP address FILL-IN

generic.sysupgrade

FIXME These are generic instructions. Update with your router's specifics.

  • Browse to http://192.168.1.1/cgi-bin/luci/mini/system/upgrade/ LuCI Upgrade URL
  • Upload image file for sysupgrade to LuCI
  • Wait for reboot

If you don't have a GUI (LuCI) available, you can alternatively upgrade via the command line. There are two command line methods for upgrading:

  • sysupgrade
  • mtd

Note: It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

sysupgrade

  • Login as root via SSH on 192.168.1.1, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc

mtd

If sysupgrade does not support this router, use mtd.

  • Login as root via SSH on 192.168.1.1, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
mtd write /tmp/xxx.abc linux && reboot

Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The default network configuration is:

Interface Name Description Default configuration
br-lan EXAMPLE LAN & WiFi EXAMPLE 192.168.1.1/24
vlan0 (eth0.0) EXAMPLE LAN ports (1 to 4) EXAMPLE None
vlan1 (eth0.1) EXAMPLE WAN port EXAMPLE DHCP
wl0 EXAMPLE WiFi EXAMPLE Disabled

FIXME Please fill in real values for this device, then remove the EXAMPLEs

Numbers 0-3 are Ports 1-4 as labeled on the unit, number 4 is the Internet (WAN) on the unit, 5 is the internal connection to the router itself. Don't be fooled: Port 1 on the unit is number 3 when configuring VLANs. vlan0 = eth0.0, vlan1 = eth0.1 and so on.

Port Switch port
Internet (WAN) EXAMPLE 4
LAN 1 EXAMPLE 3
LAN 2 EXAMPLE 2
LAN 3 EXAMPLE 1
LAN 4 EXAMPLE 0

hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The Linksys EA7300 has the following buttons:

BUTTON Event
EXAMPLE Reset reset
EXAMPLE Secure Easy Setup ses
EXAMPLE No buttons at all. -
General
Brand Linksys
Model EA7300
Versions v2
Device Type WiFi Router
Availability Available 2020
Comments - general
OpenWrt Support
Supported Since Commit https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=620f9c773413a0deaeda2bdc22d5e9cb89b9317f
Supported Since Release 21.02.0
Supported Current Release 21.02.0
Unsupported
Hardware
Bootloader U-Boot
Target ramips
System-On-Chip MediaTek MT7621AT
CPU MHz 880
Flash MB 128NAND
RAM MB 256
Network
Ethernet 100M ports -
Ethernet Gbit ports 5
Switch MediaTek MT7621AT
Modem -
VLAN Yes
Comments - network ports
Wireless
WLAN 2.4GHz b/g/n
WLAN 5.0GHz a/n/ac
WLAN Hardware MediaTek MT7603E, MediaTek MT7615N
Detachable Antennas -
Comments - WLAN
Interfaces
USB ports 1x 3.0
SATA ports -
Serial ¿
JTAG ¿
Comments - USB & SATA ports
Misc
LED count 12
Button count 2
Power supply 12 VDC, 1.5 A
Links
Forum Topic URL
WikiDevi URL https://wikidevi.wi-cat.ru/Linksys_EA7300_v2
OEM device homepage URL https://www.linksys.com/us/p/P-EA7300/
Firmware OEM Stock URL https://www.linksys.com/us/support-article?articleNum=205516
Firmware OpenWrt Install URL http://downloads.openwrt.org/releases/21.02.0/targets/ramips/mt7621/openwrt-21.02.0-ramips-mt7621-linksys_ea7300-v2-squashfs-factory.bin
Firmware OpenWrt Upgrade URL http://downloads.openwrt.org/releases/21.02.0/targets/ramips/mt7621/openwrt-21.02.0-ramips-mt7621-linksys_ea7300-v2-squashfs-sysupgrade.bin
Edit the underlying data View/Edit data

Front:

Back:

Backside label:
Insert photo of backside label

Note: This will void your warranty!

FIXME Describe what needs to be done to open the device, e.g. remove rubber feet, adhesive labels, screws, …

  • To remove the cover and open the device, do a/b/c

Main PCB:

port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:
Insert photo of PCB with markings for serial port

FIXME Replace EXAMPLE by real values.

Serial connection parameters
for Linksys EA7300 v2
EXAMPLE 115200, 8N1

port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:
Insert photo of PCB with markings for JTAG port

None so far.

COPY HERE THE BOOTLOG WITH THE ORIGINAL FIRMWARE


COPY HERE THE BOOTLOG ONCE OPENWRT IS INSTALLED AND RUNNING


Space for additional notes, links to forum threads or other resources.

  • This device will boot occasionally back to the stock firmware after install. Reports of this are e.g. https://forum.openwrt.org/t/can-not-install-openwrt-on-linksys-ea7300-v2/85421/9. Reason for this is that the bootcounter cannot be reset properly. This is manifested by messages in dmesg about uncorrectable ECC errors, such as `mt7621-nand 1e003000.nand: Uncorrectable ECC error at page 522.1`. The bootcount record is appended/written, but the hardware seems to overwrite this with the last bootcount instead of 0. A workaround for this is mentioned in https://forum.openwrt.org/t/uncorrectable-ecc-error/88736/5 by simply issuing `mtd erase s_env`. This is somewhat crude, but seems to prevent the bootloader from switching the active partition. One could add it as local entry post-boot in `/etc/rc.local`

FIXME Add tags below, then remove this fixme.

How to add tags

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  • Last modified: 2021/08/29 15:03
  • by tmomas