Linksys E1000 v2.1

Wikidevi Notes
"3763-11200701R" is silkscreened on the board in the FCC photos.

The default SSID is probably CiscoXXXXX where XXXXX is the last 5 digits of the serial number. If the device has been configured with Cisco Connect the device will probably have a randomly generated SSID.

Supported by K26RT-N builds of Tomato by Shibby.

Links of Interest

 * DD-WRT Firmware Development for Linksys E1000 v2.1
 * Tomato Firmware Development for Linksys E1000 v2.1

Serial Pinouts
 This image contains the pin outs for the E1000 v2.0 version, however these pin outs are identical to the v2.1 version of the Linksys E1000 v2.1 Router.

Serial Interfaces
You need a level shifting 3.3v TTL adapter. You can get Nokia CA-42 cables online for about 3.00 and cut the phone end off. Then you have to figure out what each wire does. You need only grd, tx and rx connected properly for the serial interface to work. When I plugged it into my XP rig...the cable was not recognized and no drivers found during the PnP process. I downloaded a utility determining the attached hardware (UVCViewer) Then downloaded the Prolific Driver from here http://www.prolific.com.tw So...  Orange = GND Blue = Rx Red = Tx

Once loaded and connected...my laptop sees the unit attached to COM8....configured Putty....and all is well.

Erase Nvram
Power cycle the router and while it is booting hit control C quickly just as your router starts You should get a CFE> prompt

The most common command you will use is the "nvram erase" command. This command will erase the nvram values that are often the cause of bricked routers At the cfe prompt:  cfe> nvram erase [enter]

To flash the firmware
This assumes you have a ttl adapter connected and ready to go. There is reference to stock firmware. This does not apply to router that used to run vxworks. All of those, have jtag tmk.. connect that bitch (the router to your serial adapter).. 115200,8,1,n and no flow control are the com, param's I use hyperterminal. In the terminal, boot the router. Immediately start hitting ctrl-c. If you hit it right you will be at the cfe prompt:  cfe>

Execute the nvram erase command at the CFE prompt Get the tftp utility ready to flash the STOCK firmware for your router so all you need to do is hit enter to launch. You are going to tell the router to accept a tftp flash of firmware. It times out quickly so that is why you need to get the utility ready to launch. Static ip on your rig.. 192.168.1.10, mask 255.255.255.0, not necessary but gateway 192.168.1.1 At the cfe prompt:  flash -ctheader : flash1.trx

hit enter.. the router will want an upload of the firmware. It will time out after three tries. Don't let it time out, now launch the tftp utility. It will upload, program and then you will be back at the cfe prompt. This will take some time. You will see what is happening in the console. You will be back at the cfe prompt when it is done:  cfe> issue a "go" command:  go [enter]

the router will launch its new firmware. Let it boot. It will boot 2 ~ 3 times.. You are done. Now install some custom firmware again. Good Luck..

Pictures
Cisco's Images

DD-WRT Notes
 root@DD-WRT:/# cat /proc/cpuinfo system type : Broadcom BCM5357 chip rev 1 processor : 0 cpu model : MIPS 74K V4.9 BogoMIPS : 149.91 wait instruction : no microsecond timers : yes tlb_entries : 64 extra interrupt vector : no hardware watchpoint : yes ASEs implemented : mips16 dsp shadow register sets : 1 VCED exceptions : not available VCEI exceptions : not available