Duplicate Networks

Overview

• More than one BACnet router routing traffic to the same network.
• There can only be one router per segment, so each router needs a unique network number for each segment.
• When network numbers get duplicated, you end up with two routers routing traffic to the same network.

Why it fails

• Misconfigurations.
• Merging sites.
• There are multiple vendors on a site and no one to coordinate it all.
• This is strictly a logical network problem, not a physical one.

How to fix it

• Go into the network that’s currently online and change the network number.
• Now it will communicate with the correct controllers, just like you want it to.
• The other router will start communicating, and you can reset it too.
• Make sure you always work with the controller that’s online. Otherwise you’ll have to fight to get controllers online and figure out which router is talking to which controllers.

Watch us troubleshoot duplicate networks in this live webinar on a corporate campus. Skip ahead to 3:25 for the duplicate networks diagnostic check.