EdgeRouter ER-X-SFP Notes

EdgeRouter ER-X-SFP

ER‑X‑SFP Pins: Ports <- 3.3V, Rx, Tx, Ground -> Lights
FTDI Serial Pins: Ground(black),VCC(red),Tx(orange),Rx(yellow)

Baud 57600 8n1, 8 bit per byte, no parity bit, 1 stop bit

screen /dev/ttyUSB0 57600,cs8,-parenb,-cstopb

Interesting Bits

U-Boot 1.1.3 (Jan 27 2015 - 17:52:09)
Ralink UBoot Version: 4.3.S.0

Its happy to load new firmware via TFTP.

Please choose the operation: 
   1: Load system code to SDRAM via TFTP. 
   2: Load system code then write to Flash via TFTP. 
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   7: Load Boot Loader code then write to Flash via Serial. 
   9: Load Boot Loader code then write to Flash via TFTP. 
default: 3

MIPS

3: System Boot system code via Flash.
## Booting image at bfd40000 ...
   Image Name:   Linux Kernel Image
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    1675882 Bytes =  1.6 MB
   Load Address: 80001000
   Entry Point:  803658a0
..........................   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
No initrd
## Transferring control to Linux (at address 803658a0) ...
## Giving linux memsize in MB, 256

Older kernel, built recently. Older gcc. Using Buildroot though.

Linux version 3.10.14-UBNT (root@edgeos-builder2) (gcc version 4.6.3 (Buildroot 2012.11.1) ) #1 SMP Fri Jan 29 20:03:40 PST 2016

INIT: version 2.88 booting

Can't open an entropy source >.>

mkdir: can't create directory '/dev/shm/network': No such file or directory
Unable to open file: /dev/tpm0
can't open any entropy source
Maybe RNG device modules are not loaded

dghubble/er-x-sfp.md

EdgeRouter ER-X-SFP

Interesting Bits