Specifications

Niagara Release 2.3
Revised: May 22, 2002 Niagara Networking & Connectivity Guide
Chapter 3 Connecting on a LAN
Troubleshooting Connectivity to an Existing JACE Controller
3–16
Determining Network Settings
If you are unsure of the network settings on a JACE controller, first attempt to
connect to the JACE at the default IP address (see the “Determining the Default
Network Information” section on page 3-10). The previous installer may have left the
controller at those settings for convenience.
If you changed the IP address of the JACE using the Admin Tool, but are unsure what
you changed it to, you can look in the
ipchanges.txt file to figure it out.
About the
ipchanges.txt
file
The ipchanges.txt file is created or updated in the
<x>:\niagara\<release>\nre\user directory of your engineering workstation
whenever you change the IP address of a host using the Admin Tool (release 2.2 or
later). This file lists:
• the time and date of the change
• the user who was logged in when the change was made
• the old and new IP addresses
• the name of the host that was changed
Figure 3-7 shows an example of two hosts whose IP addresses were changed.
Notes • An ipchanges.txt file can exist for each release you have installed on your
PC. If you cannot find the file in the current release directory, check previous
release directories. You may have changed the IP address using a previous
release.
• The ipchanges.txt file only records IP address changes you make using the
Admin Tool. It will not record a change made with another method (such as
Windows networking tools).
Figure 3-7 IPchanges.txt file.
If you cannot connect to the JACE using either of these two methods, then use the
model-specific information that follows to help you find this information.
Time and date
User
New IP address
HostOld IP address