UDP 7400
Synopsis
- UDP port 7400 is the base/discovery port for the OMG DDSI-RTPS (Real-Time Publish-Subscribe) protocol.
- RTI Connext DDS uses UDP 7400 by default for participant discovery traffic.
- eProsima Fast DDS (formerly Fast RTPS) uses UDP 7400 as its base discovery port, as do Eclipse Cyclone DDS, OpenDDS, and ADLINK OpenSplice DDS.
- Because ROS 2 relies on DDS, ROS 2 systems (using Fast DDS, Cyclone DDS, or Connext) send discovery/metadata traffic on UDP 7400 (with additional offsets per DDS domain).
- Robotics stacks built on ROS 2—such as Autoware and NVIDIA Isaac ROS—therefore generate DDS discovery traffic on UDP 7400.
- Simulators and tools that integrate with ROS 2 and DDS (e.g., Gazebo/Ignition with ROS 2) also use UDP 7400 for DDS discovery.
Observed activity
Last 30 days
Detailed chart