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# service nfs restart
Sometimes it may be necessary to modify the firewall configuration to allow for incoming NFS and TFTP
connections.
4.)
If you set up your development PC to a static IP address of 192.168.0.6 with netmask 255.255.0.0,
and installed the software so that the images are at /home/z3/z3-netra/images and the root file system is at
/home/z3/z3-netra/filesys/fs then steps 4 – 7 are not necessary. Otherwise you will need to tell the DM8168
where to find these files, including the IP address of the server that contains them.
Copy the file .../u-boot/u-boot-env-netra.txt to the Windows PC running Teraterm. Edit the file and change
the following variables (see below) to match your own system and network. Note: Use a Windows editor
as it is important to Teraterm to have CR-LF instead of just LF.
setenv ipaddr 192.168.0.56
setenv gatewayip 192.168.0.1
setenv netmask 255.255.0.0
setenv serverip 192.168.0.6
setenv tftp_root z3/z3-netra/images
setenv nfs_root /home/z3/z3-netra/filesys/fs
5.)
Reboot the DM8168-MOD system and press the space bar to make it stop in the u-boot prompt.
Make sure that your terminal is pausing for 120ms or more at the end of each line.
This is important because the serial port does not have hardware flow control.
*Go into the Teraterm "Setup" menu, select "Serial port...".
Set the "Baud rate" to 115200, "Data" to 8 bit, "Parity" to none, 1 stop bit and flow control to "none"
At "Transmit delay" part, enter 120 in the box next to "msec/line", then click OK.
6.)
Now upload the new environment variables to the board:
In Teraterm, go to the "File" menu and click on "Send file...".
Select the file with the variables that was just edited.
7.)
When you get the u-boot prompt again, enter the commands below. This will enable mounting the
rootfs using NFS and booting the kernel by TFTP.
Z3-DM8168-MOD# setenv bootcmd run boot-nfs
Z3-DM8168-MOD# saveenv
8.)
Make sure that the DM8168 is connected to your network and power cycle. If the steps above are
successfully completed, the DM8168 system will boot the kernel obtained via TFTP from the Linux PC,
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IP address of the target system
Usually the router in your network
As per your network parameters
The computer with the TFTP server
Location of the images folder in TFTP space
Location of the root file system
13
Z3-DM8168-PCI-RPS
V1.1
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