How to Update R6300v2 Charter Firmware Update

How to Update R6300v2 Charter Firmware Update

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The R6300v2 is an ARM device.
DO NOT Apply
this guide for the MIPS
R6300 “v1”.

Hardware Specs

CPU Broadcom BCM4708A0
CPU Speed 800 MHz (2 Cores)
Flash ROM 128 MB
RAM 256 MB
Radios BCM4360 v GHz & BCM4331 ii.4 GHz
WLAN Support a/northward+ac 3×3:iii & b/k/n 3×3:3
WLAN Max Speed 450 Mb/south (2.4Ghz), 1300 Mb/due south (5Ghz)
Antenna Location Internal
Switch 4x GigE LAN + 1 GigE WAN
USB 1x USB iii.0 + 1x USB ii.0
Power Adapter 12VDC two.5A wall wart

R6300v2 Versions

At that place are at least
three variants of the R6300v2
device. Charter (an ISP) puts out a custom R6300v2 unit of measurement with “Model: R6300v2” on the bottom and blue coloring on the front, not the standard yellow. When you open the stock firmware web interface you lot will note a “CH” at the finish of the stock firmware name/version.

  • In that location is another ISP unit for “Spectrum Wifi” with a blue stripe, no “CH” on the bottom label, and whose firmware has no trailing “CH”. The Initial Flash R6300V2CH.chk file from Kong worked, forth with upgrading.
  • Another Internet access provider unit is for “COX Communications” with
    U12H240T33. None of the below files seem to work in the upgrade procedure. For further information about updating these units see this thread.
    Netgear R6300v2 COX Link

Exist conscientious to flash the correct INITIAL firmware for your version!

Version R6300v2 R6300v2CH (Charter Internet service provider)
Router Characterization (lath id) R6300v2 (U12H240T00) R6300v2 (U12H240T70)
Netgear Support OEM Link Charter Firmware Link
DD-WRT supported since 23082 2013-12-12 Since Kong’s initial v2CH file (below)
DD-WRT Initial Flash file 26138 factory-to-dd-wrt.chk R6300V2CH.chk
MD5 of Initial Wink File f801997c59cb7a734ac41afc2e929a98 6c5d1b70e994ffea71850e3d6b677d69

Make up one’s mind your R6300v2 variant & download the proper initial flash file from the table above:

  1. Connect to the router (using router DHCP is fine) via LAN cable or WiFi
  2. In web browser, go to
    and login (if you have to reset details, including default username/password, are in flash department below)
  3. Click on Avant-garde > Administration > Router Condition
  4. Check the Stock Firmware version for a trialing “CH”
  5. If there is a “CH” download the “CH” initial wink file, if not yous can utilize the regular initial flash file
  6. See yellow highlights in screenshot below for details.
  • Too see the
    R6300v2 Versions
    section in a higher place almost the “Spectrum Wifi” variant
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Screenshot of R6300v2CH unit:

Netgear AC1450

This has
U12H240T99: see more info at
Netgear AC1450

Flashing Instructions

Read the
Firmware FAQ. Also meet the
Peacock Announcement
for historical reference on Broadcom routers, even if some details do not apply to an ARM device.

Initial DD-WRT Installation

Verify y’all take the appropriate build!

From stock Netgear firmware to DD-WRT on a R6300v2:

  1. Turn on router, look for Power light to go solid green, then reset router:
    1. Reset Per Netgear Documentation: Use the end of a newspaper clip or a similar object to press and hold the Reset push on the back of the router for at least 7 seconds. The router resets, and returns to the factory configuration
      Note: WiKi author recommends belongings reset for at to the lowest degree xx seconds.
    2. Subsequently releasing Reset button, router should reboot with much flashing of lights.
    3. Await for Power light to become solid green again.
  2. Connect PC to i of router’southward LAN ports with an network cable (using router for DHCP is okay). This should be the ONLY connection for the router & PC
  3. Clear web browser cache.
  4. In web browser, become to
    netgear default username & password is “admin” & “password” respectively (no quotes)
  5. Click on Avant-garde > Administration > Router Update
  6. Select special
    firmware file you downloaded from tabular array to a higher place.
  7. Later the router says information technology is done… wait at least 5 minutes longer (5 full earth minutes) for it to fully reboot and power calorie-free to get solid dark-green again. (Why expect? Run into peacock Note 1 “Important2” assuming paragraph.)
  8. In spider web browser, go to
  9. Verify DD-WRT successfully installed.
  10. Reset router (as documented above), and wait for router to reboot and Power light to become solid green once more.
  11. In web browser, go to
    (yous should see the DD-WRT create password screen)
  12. Create a countersign using the standard DD-WRT GUI
  13. Prepare Countersign, Login and manually configure DD-WRT.
  14. Annotation:
    Some users have needed to reset NVRAM from the CLI, encounter the “NO 30-30-30 reset…” department beneath for details. While these concluding few steps may non be necessary, the wiki author has performed them without issues.

  15. Telnet over to router (username = root & countersign = the one you but set)
  16. From telnet pass the following command (without quotes): “nvram erase && reboot”
  17. …look for router to reboot and Power calorie-free to go solid green once more (5 minutes).
  18. In web browser, go to
    (y’all should exist back at the set password screen again)
  19. Set Password, Login and manually configure DD-WRT.
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Note one:
If you get an error bulletin stating that the firmware y’all are loading is the same or older than the stock firmware on the unit of measurement, that is fine. Have information technology load the firmware anyway.

Note 2:
While non ever necessary information technology is also a best practice to set your calculator to a static IP of (or to whatever subnet the router is on) for flashing. Also when flashing from a windows client I like to open up a command prompt window and laissez passer the following command (no quotes) “ping 192.168.1.i -t -i 200” and spotter the TTL responses during the process. Remember to set your client back to go IP from DHCP when you are finished.

DD-WRT Upgrade

(trailed .chk build would also piece of work) file for desired build: run across
Where exercise I download firmware?.

Locate correct firmware in folder
netgear-r6300v2: practise
use broadcom_K26 nor broadcom_K3X folders.

Initial DD-WRT Installation
except use DD-WRT
Administration->Firmware Upgrade. Reset afterward.

Render to Stock

Flashing back to Netgear Firmware is supported. Simply use the dd-wrt web interface and upload netgear firmware. Since netgear is not using the same countersign var as dd-wrt you lot take to reset the router later you lot flashed back to netgear firmware, otherwise the netgear webif will not take the default password. (Per Kong’due south pre-Oct. 2014 “readme” file.)

Build Data

It is generally recommended to use latest builds,
only first read the forum build threads
to avoid bad builds.

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Forum threads for reference:

Support for Netgear R6300 / R6300v2
covers both v1 and v2
and then read advisedly!

New Broadcom ARM commuter
was the rallying point for Kong build testing (deprecated).
— Since this device has a similar architecture to the R7000, forum info related to it could also be beneficial.

DO NOT 30-30-30 Reset ARM Devices

Reset notes:
In early 2015, Kong announced
a reset is required for certain upgrades too. Do NOT restore an NVRAMBAK from previous build as it will undo the reset. While not always necessary, a reset with transmission configuration is recommended for large version changes, and required before reporting issues.

There are a few methods to reset. The first is using the reset button:

  • When DD-WRT is running, press and agree the reset button until the lights flash (>10sec).

GUI Reset:
To restore default nvram settings either:

  • Select the manufactory reset option from the firmware upload GUI drop-down menu:
    • Assistants->Firmware Upgrade
    • Select the firmware file and “reset to defaults” from the driblet-downwardly menu, and then click
  • …or use the reset to default settings pick:
    • Administration->Factory Defaults
    • Select radio push button, so

From telnet/ssh (CLI):
Telnet (or SSH, if enabled) to the device and see
Erasing NVRAM, as this is build-dependent.

How to Update R6300v2 Charter Firmware Update

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