Fife SBPC-21-EN, Инструкция для пользователя, Страница: 14 / 44

Using Address Resolution Protocol (ARP)
The IP address can be changed during runtime using the ARP command from a PC. The new IP
address will also be stored in internal FLASH. Below is an example on how to change the IP address
from an MS DOS™ window:
arp -s <IP address>
1
<MAC address>
2
ping <IP address>
1
arp -d <IP address>
1
1
The IP Address to assign to the SBPC-21-EN.
2
The 6-digit MAC address from the label on the SBPC-21-EN.
The arp -s command will store the IP and MAC addresses in the PC’s ARP table. When the ping
command is executed, the PC sends this information to the SBPC-21-EN using the MAC address. The
module detects that it was addressed with the correct MAC address and adopts the IP address sent by
the PC. The new IP address will also be stored in internal FLASH. (The arp -d command is optional,
but it removes the static route from the PC ARP table.) This method can be used to reconfigure
modules that already have been configured. The MAC address is printed on a label on the bottom side
of the SBPC-21-EN.
Note: As the arp command automatically configures the subnet mask to 255.255.255.0, the first three
bytes of the IP address must be the same as for the PC executing the command.
Figure 1-4: Example Connection Using ARP to Change SBPC-21-EN IP Address
PC’s IP address is 84.83.83.2
Ethernet crossover cable allows
direct connection to SBPC-21-EN.
FifeNet provides power for SBPC-21-EN.
SBPC-21-EN MAC ID:
00-aa-00-62-c6-09
Desired IP Address
84.83.83.5
In the above example, the following commands would set the SBPC-21-EN IP address to 84.83.83.5.
arp –s 84.83.83.5 00-aa-00-62-c6-09
ping 84.83.83.5
arp –d 84.83.83.5
07-02-2004
Figure Sheet 1-849-C Page 8