Altera Corporation 47
Nios Development Board Reference Manual, Cyclone Edition Board Ethernet Connection
Appendix C
4
The board will continue to attempt DHCP self-configuration for one full
minute. You can tell whether DHCP has succeeded, or is still in progress,
by reading status-messages on the LCD display. If your LAN does not
support DHCP, or if you are using the point-to-point option above, then
DHCP configuration will ultimately fail.
You can stop the DHCP process at any time by pressing push button
switch SW3. Sending an exclamation point (!) to the board on the console
serial port will also immediately terminate DHCP configuration.
If DHCP succeeds, the board will display a success message on the LCD
display. It will also continuously display its IP address.
If DHCP fails (or is aborted), the board will obtain its IP address from flash
memory. All boards are delivered from the factory with the IP address
10.0.0.51. You can change the IP address using commands sent via the
console serial port (see “IP Addresses for Point–to–Point Connections”
below).
IP Addresses for Point–to–Point Connections
Your host computer and the development board are the only two devices
connected to a very simple (one-wire) network. When the board is
delivered from the factory, it is pre-programmed with the default IP
address 10.0.0.51. (The 10.0.0.x subnet is conventionally reserved for
development, testing, and prototyping.) For most operating systems, it
will be necessary to assign your host computer an IP address on this same
subnet.
For example, the address 10.0.0.1 will work fine. Your computer and your
development board are the only two devices connected on this simple
network, so it is not necessary to get an address assigned to you by your
system administrator. Any address in the 10.0.0.x subnet will work and
there is no possibility of conflicting with another device on the network.
You do, however, need the ability to change the IP address of your host
computer. On Windows machines, this is accomplished through the
Network Connections control panel.
Upon reset, the board will power-up and attempt DHCP self-
configuration. On a point–to–point network, you should abort DHCP by
pressing SW3. If you frequently use your board in a point–to–point
configuration, you may wish to disable DHCP entirely by typing the
command: xdhcp:off to the console serial port.
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