Rockwell Automation 1761-NET-ENIW MicroLogix Ethernet Interface (ENI) User Manual - Manual (Page 130)

Publication 1761-UM006E-EN-P - August 2005
B-2 BOOTP Configuration Method (default)
ENI/ENIW BOOTP
Operation When BOOTP is enabled, the following events occur at power-up:
• The ENI/ENIW broadcasts a BOOTP-request message containing
its hardware address over the local network or subnet.
• The BOOTP server compares the hardware address with the
addresses in its look-up table.
• The BOOTP server sends a message back to the ENI/ENIW with
the IP address and other network information that corresponds
to the hardware address it received.
With all hardware and IP addresses in one location, you can easily
change IP addresses in the BOOTP configuration file if your network
needs change.
The ENI/ENIW allows the BOOTP request to be disabled by clearing
the BOOTP Enable parameter. See Node 252 - BOOTP Configuration
on page 4-15.
Table B.1 TCP/IP Parameters
Function Format Notes
IP Address Integer This is a unique IP Address for the ENI/ENIW.
Format is aaa.bbb.ccc.ddd.
Default is 000.000.000.000.
Subnet Mask
optional (1)
(1) Depending upon whether your BOOTP server allows these optional fields to be included, you might not be able
to configure these parameters. If that is the case, configure them using the soft configuration method. See
page 4-1 for more information. If you do not need to define a Subnet Mask or Gateway, simply ignore these
parameters.
If not sent, the default mask is derived from the class
of the IP address. See page 4-17 for more information
on the subnet mask.
Gateway
optional
(1) Only needed if a Gateway is present on the Subnet.
Default is 000.000.000.