Linksys E4200 v1

Additional chips
2.4GHz Power Amplifier IC;Skyworks;SE2528L;SiGe, 2528L, 108EC;2;
2.4/5GHz Front End Module;Skyworks;SE2594L;SiGe, SE2594L, 109HD;3;

Other

Default SSID: CiscoXXXXX (6 addl. devices)
Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1324 additional devices
of which 155 are Linksys devices
Default login user: blank
Default login password: admin
blank:admin credentials used by 278 additional devices
of which 135 are Linksys devices

Manuf/OEM/ODM

CyberTAN

3rd Party Firmware Support

DD-WRT • (List)
, Tomato (Shibby) • (List | DLs)
, TomatoUSB RAF (Victek) • (List | DLs)

Retail

Availability

End of Life

FCC approval date

20 October 2010

(Est.) release date

19 January 2011

UPC

745883590438
(UPC DB, On eBay)

ASIN

B004K1EZDS

Country of manuf

China

Physical

LEDs/Color

top-front 2x White/ back 5x Yellow, 5x Green

Radio 1

Chip1

Broadcom BCM4718A1

Wireless interface OUI

58:6D:8F, C0:C1:C0

Antenna Connector Type

none specified

MIMO status

2x2:2

Wireless Standard

IEEE 802.11b/g/n

802.11n

up to 300 Mbps

802.11g

up to 54 Mbps

802.11b

up to 11 Mbps

WiFi Operating Frequency

2.4 GHz

Radio cor_rev

Radio 2

Chip1

Broadcom BCM4331

Wireless interface OUI

58:6D:8F, C0:C1:C0

Antenna Connector Type

U.FL

MIMO status

3x3:3

Wireless Standard

IEEE 802.11a/n

802.11n

up to 450 Mbps

802.11a

up to 54 Mbps

WiFi Operating Frequency

5 GHz

Radio cor_rev

	CPU1 brand	Radio1 chip1 brand	Radio2 chip1 brand
Linksys E4200 v1	Broadcom	Broadcom	Broadcom
Linksys E4200 v2	Marvell	Marvell	Marvell

For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.

For a list of all currently documented Linksys device with specifications, see Linksys.

• 450 Mbps - 3SS 5GHz 802.11n (40MHz chan.),

• 300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.) = AN750 class

Overview

"3763-40700105R" and the Cisco logo is silkscreened on the board.

This router uses Galtronics antennas.

Note: Three antennas are used by the 2.4 GHz radio, but it's still a 2T2R radio..

The default SSID pattern for this device is CiscoXXXXXX on both bands,

where XXXXX is the last 5 characters of the serial number.

Wi-Fi Certified : WFA9933 (as of 10/18/2010)

Links of Interest

Wikis

On the DD-WRT wiki

Reviews

Review on SmallNetBuilder

Forum threads

The v1 serial numbers appear to start with 01C10C..

Firmware projects

This device is supported by...

Victek's Tomato RAF builds
Shibby's Tomato builds (K26 and K26RT-N)
Toastman's Tomato builds

Flashing

NOTE: During configuration or flashing a device, the only things that should be hooked to the device is the computer and power.

Flashing dd-wrt

WARNING: Requires nv60k for DD-WRT after initial flash, Do not flash anything else!

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.
1. The E4200 specific mini builds are also -nv60k builds, they just aren't labeled as such.
Wait approximately 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 (Mega, Big, std_usb_nas, OpenVPN, VoIP.)
1. WARNING 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)
If flashing to another build always perform a 30/30/30 before and after flashing

Flashing OpenWrt

This device is NOT RECOMMENDED for future use with OpenWrt due to low flash/ram.

DO NOT BUY DEVICES WITH 8MB FLASH / 64MB RAM if you intend to flash an up-to-date and secure OpenWrt version onto it! See 8/64 warning for details.

This device does not have sufficient resources (flash and/or RAM) to provide secure and reliable operation.

This means that you will not be able to install many packages, and that you might experience crashes due to OOM situations more or less often. See OpenWrt on 8/64 devices what you can do now.

Devices with Broadcom WiFi chipsets have limited OpenWrt supportability (due to limited FLOSS driver availability for Broadcom chips). Consider this when choosing a device to buy, or when deciding to flash OpenWrt on your device because it is listed as supported. See Broadcom WiFi for details.

On the OpenWrt ToH (techdata entry)
On the OpenWrt Wiki
On the OpenWrt Forum
OpenWrt Target: bcm47xx
OpenWrt Subtarget: mips74k
OpenWrt Package architecture: mipsel_74kc
Support started version: 14.07
Current supported version: 23.05.5
Unsupported Functions:
WiFi 5GHz
Comment:
This router has a 5 GHz radio, but as of OpenWrt 19.07.3 r11063-85e04e9f46, the 5 GHz radio only operates as 2.4 GHz,

Please insert instructions here

Flashing Tomato

tomato-E4200-test-5 - Test Build

Upgrading

Upgrading dd-wrt

If dd-wrt 17084 and up is already on the router, builds with nv60k in the name can be used for upgrade.

Reverting

Reverting dd-wrt

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.

USB Info

DD-WRT USB

The USB port is where you can connect an external USB hard drive or flash drive. Which can do a multitude of things. You can use in as a NAS, storage for a FTP server, use Optware to run external programs like torrent software, samba for sharing files to network, share a USB printer with network... The list of possibilities is long, it just takes a little research.

ProFTPd, samba, dlna, raid support is included in most the newer builds of dd-wrt. Check the features chart to be sure.

Pictures

from Cisco
angled unit
angled front
top
front
back
box

internal
board top
board top, shields off
over the BCM4331
BCM4331 w/ top shield off
...and closer up
CyberTAN P/N, RAM, etc.
RAM
antenna and Flash
5 GHz RF section
2.4 GHz RF section
BCM53115 GbE Switch
L side, top view
R side, top view
L side, over top (angled)
L side, angled internal, over top (angled)
L side, front, over top (angled)
L side, antenna view
R side, angled back, over top (angled)
R side, angled front, over top (angled)
back side, angled top view

Notes

nv60k

Eko

Just a note on upgrading e2000, e3000 and e4200 routers already running dd-wrt. These need -nv60k.bin builds, but this will work only from now on. So for initial upgrade use proper mini-eXXXX.bin build and then upgrade with -nv60k.bin build. If you flash a -nv64k.bin, your E4200 will bricked!

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. Disable Afterburner, if you use two Routers in AP <->Client Bridge-Mode)
Highest transfer rates are being achieved on channels 100-128. Do not set channel to Auto!
Be patient, let SNR settle down before testing speeds.