Specifications
Table Of Contents
- About This Document
- Understanding Networking and IP Addressing
- Introduction to Networking
- Networking using IP
- Niagara Considerations
- Additional Information
- Configuration and Troubleshooting Tools
- Connecting on a LAN
- Connecting with Direct Dial
- Connecting to an ISP
- Using Security Technologies
- Configuration Files Used for Communication
- Glossary
- Index
Chapter 3 Connecting on a LAN
Troubleshooting Connectivity to an Existing JACE Controller
Niagara Release 2.3
Niagara Networking & Connectivity Guide Revised: May 22, 2002
3–17
JACE-NP There are two methods you can use to track down misplaced network settings for a
JACE-NP. One is fairly easy to implement, but it assumes you know some
information about the JACE. The other is more complex, but assumes you know little
information about the JACE.
Method 1 (Easy)
Each JACE-NP ships from the factory with one of the following default names:
• NPenumber—for embedded NT models shipped after December 2000
• NPnumber—for full NT models and earlier versions of the embedded model
• NPmnumber—for models with a modem (these also have full NT)
In addition, when shipped, the NP is a member of a Windows workgroup named
Workgroup. If these default settings have not been changed (or if only one of them
has been changed) you may be able to browse the Windows Network to determine
the name of the JACE. Then you can use the TCP/IP ping utility to help you find the
IP address, and the Admin Tool tool to determine the subnet mask and default
gateway.
Note This procedure only works if you know the network portion of the JACE’s IP address
(for example, 192.168.1.x).
Procedure 3-5 Determining an IP address for an unknown JACE-NP.
Step 1
On your engineering station, connect to the same Ethernet hub as the JACE-NP.
Alternately, connect to the JACE with a crossover cable.
Note Microsoft workgroup information is spread via broadcast and many routers
are configured to prevent this information from being forwarded to another
network segment. Therefore, in order to browse the workgroup the JACE is
in, you must be on the same network segment.
Step 2
Using one of the methods described in “Connecting an Engineering PC”, change the
IP address settings on your engineering station to match those of the customer’s
LAN, or those of the JACE (see the first note in this section).
Your PC is now in the same IP address range of the JACE you are trying to reach.
Step 3
Using one of the following methods, open a window to browse the network:
• Windows NT 4.0—Double-click Network Neighborhood on the desktop.
• Windows 2000—Double-click My Network Places on the desktop.
Step 4
Double-click Entire Network.
Step 5
Double-click Microsoft Windows Network.
Step 6
Double-click Workgroup.
You see the list of machines belonging to the Workgroup workgroup. JACE-NPs
have names beginning with NP.