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Operations

Network Troubleshooting

Resolve access, addressing, Wi-Fi and BACnet connectivity problems.

On this page

Overview

Work through the section that matches your symptom. If the problem remains, contact support with the gateway's label details and what you tried.

Cannot open the C-Bridge interface

  1. Confirm you are on the same local network as the gateway.
  2. Try the IP address instead of the hostname. Find it in your router's DHCP table.
  3. If using http://cbridge-XXXX.local:3000, mDNS must be enabled on your computer.
  4. Wait 2 minutes after a reboot, then retry.
  5. Clear the browser cache and try again.

Hostname does not resolve

  • macOS and Linux normally resolve .local names by default.
  • On Windows, install Apple Bonjour or use the IP address.
  • Across VLANs, mDNS usually does not cross the boundary. Use the IP address.

The IP address keeps changing

Ask IT for a DHCP reservation using the MAC address on the device label, or set a static IP. See Static IP Configuration.

Gateway shows Offline

  • Check the Ethernet cable at both ends and try another cable or port.
  • Confirm the switch or router is active.
  • Confirm the network allows outbound TCP 443. See Firewall & IT Requirements.
  • If using Wi-Fi, check signal strength at the install location.

Wi-Fi setup not working

  • Connect to the CBridge_Setup_XXXX network.
  • Open http://192.168.4.1, not the .local hostname.
  • After saving credentials, wait 2 minutes for the gateway to reboot and connect.
  • Verify the SSID and password.

BACnet client cannot reach the gateway

  • Confirm the gateway and BMS are on the same subnet, or that routing between them is set up.
  • Confirm UDP 47808 is not blocked.
  • Use a fixed address for the gateway.