Netgear WNR2000V2

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Contents

[edit] Hardware

[edit] Specifications

FCC ID PY309100105
Power 12 VDC, 1 A
CPU Broadcom BCM4716B0 (300 MHz)
Flash/RAM 4 /32 MiB
Wireless chip1 Broadcom BCM4716B0
Wireless protocols bgn
Wireless MIMO config 2x2:2
Antenna connector U.FL
WAN / LAN ports 1 / 4 @ 10/100 Mb/s

[edit] MTD Partitions

From a `dmesg` output:

[edit] CFE log
CFE for WNR2000v2 version: v1.0.18
Build Date: Wed Sep  9 14:33:22 CST 2009
[...]
Creating 10 MTD partitions on "sflash":
0x00000000-0x00040000 : "boot"
0x00040000-0x00390000 : "linux"
0x000c0e78-0x00390000 : "rootfs"
0x00390000-0x003a0000 : "ML1"
0x003a0000-0x003b0000 : "ML2"
0x003b0000-0x003c0000 : "T_Meter1"
0x003c0000-0x003d0000 : "T_Meter2"
0x003d0000-0x003e0000 : "POT"
0x003e0000-0x003f0000 : "board_data"
0x003f0000-0x00400000 : "nvram"
[edit] Running DD-WRT
Creating 5 MTD partitions on "sflash":
0x00000000-0x00040000 : "cfe"
0x00040000-0x003e0000 : "linux"
0x0018bc00-0x00390000 : "rootfs"
0x003f0000-0x00400000 : "nvram"
0x00390000-0x003e0000 : "ddwrt"

[edit] Flash Size

DD-WRT replaces the linux partition and adds ddwrt, but board_data and nvram must be preserved.

  • Thus the size limit is: 0x3E0000-0x40000=3712 KB

[edit] Initial Flash Instructions

THESE INSTRUCTIONS ARE FOR THE VERSION 2 MODEL ONLY! For V3 see HERE.

  1. Read the Fireware FAQ and Peacock announcement
  2. Download (see Where do I download firmware?) trailed build K2.6_mini-WNR2000v2.chk from the broadcom_K26 directory.
    • Note: the broadcom_K3X build directory lists the WNR2000v2, but it is too big to flash!
  3. Push the reset button on the back of the router until the lights flash (or 30s), then release.
  4. Attach an Ethernet cable to a router LAN port, and disable wireless on the computer.
  5. Wait until you have a connection with the router then login to the router at http://192.168.1.1/
  6. At the password prompt, put admin/admin or admin/password for the username/password
  7. Go to the Router Upgrade link on the left side of the router gui and click on it
  8. Navigate to and Choose the file that you downloaded, double checking that it is the mini-WNR2000v2.chk file and not some recipe your grandma sent you or some other router file
  9. When it asks you if you want to upgrade to a different version, click on yes.
  10. Wait FIVE full minutes after the upgrade appears to have finished. You can watch the lights on the front if you need something to do. As long as they are changing, you need to sit quietly and wait! If you screw this up you WILL brick your router. When the green and blue lights, and the connected port light have all stopped blinking, it should be ready as long as you have waited FIVE FULL MINUTES!
  11. Log onto the router at http://192.168.1.1/
  12. Set the username and password by TYPING in the boxes and hitting enter.
  13. Reset the router as outlined in note 1 of the peacock announcement. THIS STEP IS IMPORTANT!
  14. Repeat steps 12 and 13 and go in and configure your router. Hit save as you make your configurations before you switch to another tab, and when you are done, hit APPLY.

[edit] Upgrading to Later Builds

Find build links in the Firmware FAQ.

  • The WNR2000v2 flash size limit was once reported as 3392 KB (3,473,408 bytes), however, larger builds such as 26490 k2.6 mini and openvpn_small were able to be flashed, as was 33413 k2.6 mini.
  • Note: failing to flash does not necessarily mean it is oversize. In fact, oversize firmware should brick due to partition overwrite.

[edit] Overclocking

Attempt at your own risk - it is recommended to add a headsink and/or improve cooling.
The BCM4716 uses the pll20mhz_table from hndmips.c, and the CFE allows overclocking.

  • Use the GUI, or (for more options) set clkfreq based on the pll20mhz_table's {cpu,ddr,axi} settings.
  • If manually setting, also set the nvram "overclocking" parameter to the {cpu} speed, for the GUI:
nvram set clkfreq={cpu,ddr,axi}
nvram set overclocking={cpu}
nvram commit && reboot
  • The RAM (Samsung K4H561638J-LCCC) is DDR400, rated for 200 MHz (the 'ddr' speed from hndmips.c).
  • In one test, an overclock at 400,200,100 without a heatsink produced a max SoC surface temperature of only 53.8degC (128degF) after several speedtest runs. `ifconfig` showed no errors.

[edit] Bad Flash Recovery

A brick from flashing too large an image can be recovered via a pin-short to enter TFTP mode as described in this thread http://www.dd-wrt.com/phpBB2/viewtopic.php?t=81013 . Timing is very important for the short, please read the entire thread for instructions. This is not without risk!

[edit] Notes

Forum device thread

WNR2000v2 has a known bug with firmware 18777 and below (also 26490): LAN1, LAN2, LAN3 and LAN4 port work properly under 10M/100M half/full duplex, but the LED display are incorrect: LAN1 and LAN2 always amber; LAN 3 always green; LAN4 LED is correct, it will display amber for 10M connection and green for 100M networking.