3.2
Applying power
The AC adapter is connected to the power socket on the WebRJS board and power is
switched on. The LED’s should start flashing after a few seconds, and after an additional
few seconds the unit has finished booting.
3.3
Assigning an IP Address
A WebNet module is, from the factory, configured to run in a so-called “Auto-IP mode”. The
technical details of assigning an IP-address with Auto-IP mode are explained in section 3.3.1
below, but you may want to skip that section and proceed to the description of the necessary
steps to assign the IP address, in section 3.3.2.
3.3.1
Auto-IP – the details
The board has, from the factory, a hardware (MAC) address, but no IP-address. Auto-IP
makes it listen to network packets for its own MAC address, and when the first IP-packet
for that MAC address comes in, it takes the receiver-IP address from that packet and uses
that as its IP address. To be able to send such a packet, an entry is added to the arp table
of the computer, where the desired IP address is associated with the MAC address. Thus,
to assign the WebNet an IP-address, the following steps should be carried out:
3.3.2
Auto-IP – how to assign an IP address
The steps described here apply to Windows machines, but a similar procedure is possible on
e.g. UNIX machines. Check your local flavour of
arp
by typing
arp -?
in a command
prompt, in case of problems.
In this example, the desired IP address is 192.168.4.10 and the MAC address is (from the
label on the WebNet module) 00-d0-c8-00-01-0d.
1. Open a command-line interpreter (DOS-prompt)
2. Make a static entry in the arp table by entering the command:
arp -s 192.168.4.10 00-d0-c8-00-01-0d
3. Ping the WebNet board:
ping 192.168.4.10
The ping command should result in 4 successive positive answers each starting with: Reply
from 192.168.4.10. If something has gone wrong, the answers start with “Request timed
out”.
If the pings responded successfully, the IP address is now assigned. Otherwise, check the
following list of possible sources of error:
WebNet User’s Guide
13
Summary of Contents for Electronic Device WebNet
Page 1: ...WebNet User s Guide I O Consulting A S Preliminary Version 6 April 2001...
Page 2: ...2 WebNet User s Guide...
Page 5: ...B 2 Your ARP table 39 B 3 AutoIP Feature 40 C References 41 WebNet User s Guide 5...
Page 15: ...Figure 6 The WebNet home page WebNet User s Guide 15...
Page 20: ...Figure 11 The configuration page for network settings 20 WebNet User s Guide...
