What is Bridge Mode?

Bridge Mode allows a device to function as a network switch, forwarding traffic between LAN ports without modifying packet data. This creates a seamless connection between devices, enabling communication as if they were on the same network. All LAN ports operate as a single network segment, relaying traffic without performing NAT. This mode is useful for extending networks, reducing bottlenecks, and maintaining transparent data flow. Proper configuration of Bridge Mode helps prevent unintended network issues and security risks.

For dual Ethernet port HMI models, bridge mode can be enabled to allow LAN1 and LAN2 to be in the same network segment, achieving the function of a switch.

For dual Ethernet port HMI models with Wi-Fi functionality, bridge mode can be enabled to allow LAN1 and LAN2 to be on the same network segment, achieving the function of a switch. The Wi-Fi will be on its own network segment.

Normally HMI’s LAN ports are “air gapped” meaning that they do not communicate with one another, and are network segmented. However enabling bridge mode allows both LAN ports to be on the same network segment. Note that this may cause broadcast storms if it creates a loop topology.

Pros: Ability to daisy chain devices such as HMIs without requiring additional hardware.
Cons: May cause broadcast storm if implemented incorrectly. Ensure connected devices do not create a loop topology. Loop topologies are safe if using a network protocol designed to prevent loops like STP.

Content created by Support Team