Common BACnet IP and Ethernet issues

Solving common BACnet IP problems like Unresponsive Devices and Global Who-Is
Common BACnet IP and Ethernet issues

There are many different issues that can crop up on IP and Ethernet networks. 

While MS/TP problems tend to be centred around bad wiring, IP and Ethernet are usually the result of a misconfiguration. A study of two years’ worth of data showed that some of the most common IP and Ethernet issues include Unresponsive Devices (71% of files), Unresponsive Routers (24% of files), and excessive Global Who-Is Router Broadcasts (19% of files). These are the most common problems we see on BACnet IP networks, but the list goes on. 

Learn more about the differences between MS/TP, IP, and Ethernet

Many of these network issues could be related. For example, excessive broadcasts might cause devices to be overwhelmed, shut down, and become unresponsive. This would flag at least two diagnostic checks in Visual BACnet. If you can uncover the root issue, you might solve several problems in one go. 

1. Identify the problem

Visual BACnet finds and highlights a wide variety of issues, like Global Who-Is, Duplicate Device IDs, Circular Networks, Duplicate BBMDs, Duplicate Networks.  

Critical diagnostic checks in Visual BACnet

2. Pinpoint the device(s)

When you dig into the data and click on a failed check, you’ll see which devices are causing issues. You’ll see the vendor name, Device ID, IP address, and more when you hover over an entry in any of the checks. 

BACnet IP check in Visual BACnet

3. Resolve the problem(s) 

Any failures or warnings in the Critical Checks should be addressed first. Start at the top and work your way down! You’ll likely solve a lot of smaller problems by solving the big ones higher up on your list. 

Monitor your networks, with the Visual BACnet Capture Tools for IP. Install these devices on your network and they’ll passively monitor, capture data, and send the information up to Visual BACnet for analysis. When issues arise, you’ll get an alert so you can dig in, identify problems, and quickly solve them. Learn more.  

Learn about solving common BACnet problems

Recent Blog Posts

The consulting specifying engineer of today is venturing into totally new territory: Division 25.

If you’re tired of going on site to capture BACnet data, look no further than your JACE.

OT Networks Overview

The latest release from Visual BACnet brings huge convenience and time saving for users with JACE controllers.

With the new 2.6.0 update for Visual BACnet, we have introduced a Linux Capture Tool. Similar to our Windows Capture Tool, now Linux users can capture BACnet IP and MS/TP traffic right from their computers.

Recent Projects

Coventry University


Chris Goodman, the Senior BMS Technician at Coventry University, had broadcast storms that were happening more and more frequently. 

Ongoing construction due to Coventry’s campus expansion meant lots of new activity, with technicians installing new devices and making network changes. Already juggling these constant additions and alterations, Goodman and his small team then had to deal with the subsequent broadcast storms. As the broadcast storms became more frequent, Goodman and his team needed a solution.

Find out how Visual BACnet helped Chris solve the broadcast storms and improve Network Health in our free case study!

Data center expansion with OTI and Optigo Connect


Stack Infrastructure is a portfolio of hyperscale computing data centers. OTI completed work on Phases I and II, and returned for the Phase III build-out of a 4-megawatt data hall and brand new central plant. The Optigo Connect network put in place in Phases I and II was expanded on this project. The team achieved quick roll-out of a large, multi-service redundant network using the Optigo OneView management interface. Going forward, the facility management team can use OneView to remotely monitor equipment, manage power usage, and meet up-time goals.

Optigo Connect MR Soluciones The Landmark


The Landmark is a sophisticated mixed-use high-rise in Mexico. The owners wanted to integrate all OT systems in the skyscraper, while maintaining separate networks for each application. The Landmark is the fourth joint project between Optigo Networks and MR Soluciones. Together, these companies provide robust services to meet any challenge.

Australian Bureau of Statistics at 45 Benjamin Way with Delta Building Automation


Delta Building Automation (Australia) had a big job renovating the Headquarters for the Australian Bureau of Statistics (ABS) at 45 Benjamin Way. The building owner wanted to improve the building’s energy use and increase their National Australian Built Environment Rating System (NABERS) score to more than 4.5 stars, out of a possible total of six. Securing the network both internally and externally was a big priority, as well.

Penn State University Optigo Networks Visual BACnet


When Tom Walker looked at Penn State University’s Navy Yard network, he saw huge issues. The system was busy and loud, to the point where the overrun network was bringing down the entire building. Because this was happening on the MS/TP network, pinpointing the problem would mean boots on the ground to segment and test the chain, piece by piece.

Penn State University Optigo Networks Visual BACnet


When Tom Walker first started working at Penn State University four years ago, there were a lot of network issues. Buildings were dropping offline. Broadcast traffic was pushing 90,000 packets per hour. Walker was on the phone almost every single night because devices were down or had to be reset.


Torre Manacar Mexico City Optigo Connect


When MR Soluciones began work on Torre Manacar, they knew they needed a flexible and scalable network infrastructure to support a wide array of integrated systems. Optigo Networks was a natural fit for the massive project, designing a robust network at a competitive cost.



Short Pump Town Center, an upscale retail center, underwent a complete renovation in 2014. The flexibility of Optigo Networks’ solution meant the retail center’s unknown final design was not a barrier to placing IP surveillance equipment in the field.



Optigo Networks connected New York-based Boulevard Mall’s security surveillance devices in December 2015, using a Passive Daisy Chain topology.

Visual BACnet tech support team


One tech support team at a manufacturer purchased an account with Visual BACnet in April 2017, for technical problems around the world.