Table of Contents
RedBoot bootloader
DNS-300 has a nice bootloader RedBoot. It allows to reflash device over Serial Console or over network by TFTP. With Serial console you can press Ctrl-C before kernel bootup and you will see following menu:
Link Down Ethernet eth0:: MAC address 00:13:46:fd:21:e2 IP: 192.168.0.101, Default server: 0.0.0.0 ==> enter ^C to abort booting ^C Boot Menu ==================================================================== 1: Start the Kernel Code 2: XModem Download 3: TFTP download 4: Command Line Interface 5: Set IP adderss 6: Setting MAC address => Select:
Reflash DNS-300 by TFTP
I've already used TFTP to repair my firmware with success. You can see logs here:
Problems with flash
After some experiments with RedBoot console, I've got dead DNS-300 with yellow status LED. Serial console showed following messages:
Link Down Ethernet eth0:: MAC address 00:13:46:fd:21:e2 IP: 192.168.0.101, Default server : 0.0.0.0 ==> enter ^C to abort booting Searching Kernel Flash Image ....OK Varifying checksum ....... <err> Checksum fail, expect=8aec3a6e got=8aed3a6e check sum fail GPIO_init 95344 OUTPUT_PORT_0 read=7f reg=1 Searching for the BOOTP server ... FAILED Try search default TFTP server .... TFTP download from server=10.9.29.1 filename=czImage Waiting to receive file .... Unable to reach host 10.9.29.1 (10.9.29.1) NO Data Received img_size=0! Unable to reach host 10.9.29.1 (10.9.29.1) NO Data Received img_size=0!
Flash by TFTP
- Connect PC with IP 172.16.121.251 to network port of DNS-300
- Start tftpd32 on PC.
- Put last firmware from DLink to the currect directory with tftpd32 and rename it to 'dns300'
- Connect serial console to DNS-300, power it on and press Ctrl-C in console
=> Select: 3 CTRL+C to abort Local IP address: 172.16.121.100 Server IP Address: 172.16.121.251 File Name: dns300 TFTP download from server=172.16.121.251 filename=dns300 Waiting to receive file .... - Raw file loaded 0x01000000-0x017dbfff, assumed entry at 0x01000000 Download completed,size=8241152 varifying .....OK. determinate image type type=1 Do not power-off this device while flash programming is proceeding!! Erase flash ...addr=0x70020000 size=0x7dc000 ... Erase from 0x70020000-0x707fc000: .......................................... ..................... OK! ... Program from 0x01000000-0x017dc000 at 0x70020000: .......................... ..................................... OK! Upgrade successfully! Boot Menu ==================================================================== 1: Start the Kernel Code 2: XModem Download 3: TFTP download 4: Command Line Interface 5: Set IP adderss 6: Setting MAC address => Select:
After this you may boot your device successfuly.