Specifications

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
3–15
• Mistake in subnet mask or default gateway—If you make a mistake when
typing either of these pieces of information, the host will be reachable on the
same network segment of the LAN, but will be unreachable by machines on
other segments (including from a WAN or from the Internet). In addition, the
host will be unable to initiate communications with hosts on other segments.
You would need to attach to the same network segment as the JACE and fix the
mistake using the Admin Tool.
Figure 3-6 provides a decision flowchart to help you troubleshoot these type of
connectivity problems with JACEs.
Figure 3-6 Troubleshooting decision matrix.
Ping the JACE by
IP address.
Does a host
respond?
Yes No
See "Determining
Network Settings"
If in DNS, ping
the JACE by
name.
Does the
JACE respond?
Compare IP
addresses of ping
results and
documentation
Yes
No
Do all
addresses
match?
Are the PC and
JACE on the same
network segment?
Yes
Get on same
network segment
as JACE
Yes
No
Correct network
settings with
Admin tool
Problem resolved
Can you reach
the JACE with the
Admin Tool?
Yes
No
Are the PC and
JACE on the same
net. segment?
Yes
No
Move testing PC to
other net. segment
Are the settings
correct?
No
Yes
Consult Tridium
Systems
Engineering
No
Is it a
JACE-NP?
No
Can you
reach it with
NetMeeting?
Yes
Use NetMeeting to
change settings