Linksys E4200
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Revision as of 14:02, 2 August 2011 (edit) Oaxley (Talk | contribs) (→Flashing Process) ← Previous diff |
Revision as of 14:15, 2 August 2011 (edit) (undo) Oaxley (Talk | contribs) (→Flashing Process) Next diff → |
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# Flash to larger build of your choosing if you need it (Mega, Big, std_usb_nas, OpenVPN, VoIP.) | # Flash to larger build of your choosing if you need it (Mega, Big, std_usb_nas, OpenVPN, VoIP.) | ||
#* '''WARNING''' AFTER installing dd-wrt, ONLY flash -nv60k builds, flashing anything else to the router will brick it as noted above (dd-wrt.v24-<build number>_NEWD-2_K2.6_<build type>'''-nv60k'''.bin) | #* '''WARNING''' AFTER installing dd-wrt, ONLY flash -nv60k builds, flashing anything else to the router will brick it as noted above (dd-wrt.v24-<build number>_NEWD-2_K2.6_<build type>'''-nv60k'''.bin) | ||
- | #* [ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2011/04-09-11-r16785/broadcom_K26/dd-wrt.v24-16785_NEWD-2_K2.6_big-nv60k.bin | + | #* [ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2011/04-09-11-r16785/broadcom_K26/dd-wrt.v24-16785_NEWD-2_K2.6_big-nv60k.bin April build with DDNS working 16785_NEWD-2_K2.6_big-nv60k.bin] |
+ | #* [ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2011/05-08-11-r16994/broadcom_K26/dd-wrt.v24-16994_NEWD-2_K2.6_big-nv60k.bin May build with DDNS working 16994_NEWD-2_K2.6_big-nv60k.bin] | ||
+ | #* [ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2011/06-14-11-r17201/broadcom_K26/dd-wrt.v24-17201_NEWD-2_K2.6_big-nv60k.bin June build with DDNS working 17201_NEWD-2_K2.6_big-nv60k.bin] | ||
# If flashing to another build always perform a 30/30/30 '''before and after''' flashing. | # If flashing to another build always perform a 30/30/30 '''before and after''' flashing. | ||
Revision as of 14:15, 2 August 2011
Contents |
Hardware Specifications
CPU | Broadcom BCM4718 |
---|---|
CPU Speed | 480 MHz |
Flash ROM | 16 MB Macronix MX25L12845E |
RAM | 64 MB |
Radios | 2.4 GHz, 5 GHz |
WLAN Support | a/b/g/n |
WLAN Max Speed | 300mbps (2.4 GHz) & 450mbps (5 GHz) |
Antenna Location | Internal (x6) |
Bands | 3 x 3 |
Switch | 4x GigE + 1 WAN Broadcom 53115 IEEE 802.3/3u/3ab |
USB | 1x USB 2.0 |
Radio wl0 is Broadcom 4718 (SoC)
Radio wl1 is Broadcom 4331 Intensi-fi Single-Chip 802.11n Transceiver
Flashing
Warnings
- The E4200 is very sensitive to the nvram size. The only safe nvram size identified for this router is an nvram size of 60kB. Recovery from a firmware with the wrong nvram size requires use of a jtag cable to erase the nvram.1
- Support for the E4200 is still very much a work in progress at this time, outstanding issues reported have included WAN stability, and both 2.4GHz and 5GHz Radio stability.
Flashing Process
- Perform these steps when flashing from the stock linksys GUI:
- Disconnect all cables and wireless clients.
- Perform a 30/30/30 reset on the device.
- Flash the latest E4200 specific mini build (dd-wrt.v24-<build number>_NEWD-2_K2.6_mini-e4200.bin) to the router. 16773_NEWD-2_K2.6_mini-e4200.bin
- The E4200 specific mini builds are also -nv60k builds, they just aren't labeled as such.
- Do NOT use a build with "nv60k" in the name for the initial flash, use only the build linked just above.
- Wait at LEAST 5 minutes for the flashing process to complete.
- Perform a 30/30/30 after the device has successfully updated.
- Flash to larger build of your choosing if you need it (Mega, Big, std_usb_nas, OpenVPN, VoIP.)
- WARNING AFTER installing dd-wrt, ONLY flash -nv60k builds, flashing anything else to the router will brick it as noted above (dd-wrt.v24-<build number>_NEWD-2_K2.6_<build type>-nv60k.bin)
- April build with DDNS working 16785_NEWD-2_K2.6_big-nv60k.bin
- May build with DDNS working 16994_NEWD-2_K2.6_big-nv60k.bin
- June build with DDNS working 17201_NEWD-2_K2.6_big-nv60k.bin
- If flashing to another build always perform a 30/30/30 before and after flashing.
Reverting back to stock firmware
- You can always revert back to stock firmware.
- Download the latest E4200 firmware from linksys site.
- Disconnect all cables and wireless clients.
- Perform a 30/30/30 reset on the device.
- Login and select the stock firmware file and flash, make sure to select "reset to defaults" on the drop down menu when flashing.
- Wait approximately 5 minutes for the flashing process to complete.
- Perform a 30/30/30 after the device has successfully updated.
Wireless-N Configuration
- As is explained in http://www.dd-wrt.com/wiki/index.php/Wireless-N_Configuration make sure that you use AES security for your wireless N network. Do not use TKIP or the wireless speed will revert to the g standard and that would be a pity. AES+TKIP is also allowed.
- Both the 2.4 and 5GHz Radios run at a stock transmitting power of 100mW, decreasing the transmitting power to a value between 40 & 50mW has seemed to help stability.
5GHz Wireless Transfer Speed Tips
These are suggestions that are being recommended inside the E4200 forums thread to improve wireless performance on the 5GHz radio. Recommendation from LiteUp! and basmaf
- Enable Frame burst
- Set Afterburner to Auto (this will only have an effect if your wireless clients use Broadcom radios)
- Highest transfer rates are being achieved on Upper channel 161 Do not set channel to Auto
- Be patient, let SNR settle down before testing speeds.
References
- e4200 build thread at dd-wrt forum
- FCC disclosures