[SOLVED] Booting a linux-embedded from a TFTP-server

Question

Original title: "Knowing IP for a device that has nothing but a bootloader flashed"
Hello,
how can I get the IP for a device that does not have a OS flashed onto it? I mean, I can't use
# ifconfig
and using
# arp-scan --interface=eth0 --localnet
on my Linux box does not return the device which IP I need.
Suggestions?
Thank you,
Giuseppe
Last edited by giuscri (2014-03-05 11:42:43)

Answer 1

forumache wrote:If it gets the IP by DHCP, look on the DHCP server and see what IP it allocated.
Apparently no IP is allocated by thre DHCP server. I think it is maybe because only the bootloader starts; I miss a OS an that device.
It is an embedded device, I can't use a live CD.
What I need to do is booting my embedded, then fetching an instance of OpenWrt via a TFTP server that's running on my linux box. But for fetching the OpenWrt img I need the IP of server and client both.
Here's the output
U-Boot 1.1.3 (Nov 3 2009 - 15:19:34)
Board: Ralink APSoC DRAM: 32 MB
relocate_code Pointer at: 81fb0000
flash_protect ON: from 0xBF000000 to 0xBF01D4A3
flash_protect ON: from 0xBF030000 to 0xBF030FFF
============================================
Ralink UBoot Version: 3.3
ASIC 3052_MP2 (Port5<->None)
DRAM component: 256 Mbits SDR
DRAM bus: 16 bit
Total memory: 32 MBytes
Flash component: 8 MBytes NOR Flash
Date:Nov 3 2009 Time:15:19:34
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:128, ways:4, linesz:32 ,total:16384
##### The CPU freq = 320 MHZ ####
SDRAM bus set to 16 bit
SDRAM size =32 Mbytes
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.
9: Load Boot Loader code then write to Flash via TFTP.
3
You choosed 2
0
2: System Load Linux Kernel then write to Flash via TFTP.
Warning!! Erase Linux in Flash then burn new one. Are you sure?(Y/N)
Please Input new ones /or Ctrl-C to discard
Input device IP (10.10.10.12) ==:<IP of my embedded device>
Input server IP(10.10.10.11) ==:<IP of my linux box>