Linksys MR8300

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The Linksys MR8300 is very close to the EA8300, so basic infos from EA8300 should also be relevant for the MR8300.

The Linksys MR8300 is a MU-MIMO Tri-Band WiFi router, which has one 2.4GHz and two 5GHz WiFi Interfaces, making it an interesting choice for wireless backhaul or repeater applications. The radios support MCS 0-9 (up through 256 QAM) for devices and paths that are compatible with those high-density modulations.

Note: The first 5 GHz radio (IPQ4019) is limited to ch. 64 and below. The second 5 GHz radio (QCA9888), is limited to ch. 100 and above. This is consistent with OEM firmware and is a result of the ART data and the data in the OEM firmware's cal data. This is perhaps due to RF design optimization and/or interoperation with 2.4 GHz, such as the two, shared antennas.

It has four 1G LAN ports, one 1G WAN port, a USB 3.0 interface and four external antennas.

It is powered by an external 12V, 2A power adapter and supports DFS and

ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
MR8300Qualcomm IPQ4019717256NAND512Qualcomm Atheros QCA4019, Qualcomm Atheros QCA9888b/g/na/n/ac-5-1x 3.0

The original version should be considered as v1. As of 2021, a version v1.1 is shipped. It also works with the same OpenWrt files.

The MR8300 is a dual partition device. Each time you install or upgrade the system (OEM or OpenWrt), it overwrites the other partition, not the active one. It is advised to keep the OEM firmware in one partition, as a fallback.

It is recommended to setup wifi with the linksys firmware and wait approx. 30 minutes for DFS to calibrate as there have been issues with wifi0, QCA9886 (channels >100). Forum Link

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.

It is assumed you have run the OEM Linksys GUI once, and setup a password as required.

Download a factory.bin OpenWrt image as shown above. It is suggested to disconnect the WAN link to avoid the router to self download the latest firmware form Linksys website. Browse the router for the OEM Linksys GUI. Skip the intro setup that wants you to download a software for smartphone by clicking on the cell phone picture. Identify to enter the GUI. The default password is admin. Then use either one of these methods, they are equivalent:

First method

  1. In OEM GUI, go to connectivty settings. You will see no manual downloading of firmware. At the bottom, click on CA next to the legal informations. You will see a manual update section now.
  2. Flash the factory.bin OpenWrt image. There are several warning messages (wrong file name …).

Second method

  1. You can also go directly to this url
  2. Flash the factory.bin OpenWrt image via the OEM GUI.

Both methods have been tested successfully with OEM firmware 1.1.8 (untested with above). Official documentation from Linksys at

Wait for about one minute for the router to perform the install and reboot. Manually browse again to enter Luci. You may have to force cache reload in your browser. You will now have the OEM Linksys GUI into the first partition as a fallback, and OpenWrt into the second partition. Active partition for boot is on OpenWrt. Setup OpenWrt as you like, and backup settings.

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

Once running OpenWrt, if you perform a sysupgrade (ssh or luci), you will NOT upgrade the current OpenWrt partition, but instead install another OpenWrt instance in the other partition, and so overwrite the OEM partition. You will have two instances of OpenWrt, without the OEM firmware as a fallback. You may want to proceed so, but it is highly suggested to keep the OEM partition as a fallback.

So in order to keep this OEM partition, you must first boot with it, and than install a factory image, just like if you were performing the very first installation (see above).

  1. Backup your OpenWrt settings.
  2. Install and use luci-app-advanced-reboot package to reboot to the OEM partition. You can also the manual power switching method. See 'Debricking' → 'Recovery (Automatic)' below.
  3. Within the OEM GUI, use one of the previous described methods to install openWrt. Install a factory.bin image, NOT a sysupgrade.bin.
  4. Restore your backup settings.

Recovery (Automatic)

The MR8300 is a dual firmware device. ie. There are 2 partitions and Linksys firmware is copied to both partitions at the factory. When you install/update the Linksys firmware, or install/update OpenWrt, the new firmware is always written to the other partition. Upon restarting the EA8300, it will subsequently try to boot from the newly installed firmware image from other partition.

If the device fails to boot after install or upgrade:

  1. Switch On and wait 15 seconds
  2. Switch Off and wait 10 seconds
  3. Repeat steps 1 and 2, three times, then go to 4.
  4. U-boot will switch to booting the previous working firmware - you should be able to access your router on LAN.

The above method can be used to toggle between the two firmwares.

Warning: If you install/update OpenWrt more than once, both partitions will be overwritten with OpenWrt firmwares, and you won't be able to revert back to Linksys OEM firmware using above method.

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
vlan0 (eth0.0) EXAMPLE LAN ports (1 to 4) EXAMPLE None
vlan1 (eth0.1) EXAMPLE WAN port EXAMPLE DHCP

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

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 MR8300 has the following buttons:

EXAMPLE Reset reset
EXAMPLE Secure Easy Setup ses
EXAMPLE No buttons at all. -
Brand Linksys
Model MR8300
Device Type WiFi Router
Availability Available 2020
Comments - general Snapshot image build disabled due to too big kernel size, see f0ea3df439c796dc6d4e
OpenWrt Support
Supported Since Commit;a=commit;h=a9071d02b5ab11fbd73ea42076a09f2fd8136517
Supported Since Release 21.02.0
Supported Current Release 22.03.2
Bootloader U-Boot
Target ipq40xx
System-On-Chip Qualcomm IPQ4019
CPU MHz 717
Flash MB 256NAND
RAM MB 512
Ethernet 100M ports -
Ethernet Gbit ports 5
Switch Qualcomm Atheros QCA8075
Modem -
Comments - network ports
WLAN 2.4GHz b/g/n
WLAN 5.0GHz a/n/ac
WLAN Hardware Qualcomm Atheros QCA4019, Qualcomm Atheros QCA9888
Detachable Antennas -
Comments - WLAN
USB ports 1x 3.0
SATA ports -
Serial Yes
Comments - USB & SATA ports
LED count 5
Button count 2
Power supply 12 VDC, 2.0 A
Forum Topic URL
WikiDevi URL
OEM device homepage URL
Firmware OEM Stock URL
Firmware OpenWrt Install URL
Firmware OpenWrt Upgrade URL
Edit the underlying data View/Edit data

Insert photo of front of the casing

Insert photo of back of the casing

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:
Insert photo of 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 MR8300 @@Version@@
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.



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

FIXME Add tags below, then remove this fixme.

How to add tags

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  • Last modified: 2022/10/03 10:26
  • by account4538