[ROS2] Two machines are in same network but can't communicate in ROS2
They can ping each other, but nodes in both machines cannot talk to each other. Topics being published are not seen by another machine too.
Asked by ahtsan on 2019-08-16 17:25:13 UTC
Comments
Did you set the same
ROS_DOMAIN_IDfor both machines?Asked by surfertas on 2019-08-18 08:06:32 UTC
A lot of people have gotten similar weirdness with fastRTPS as their dds implementation. If you are using that, I recommend switching to opensplice and seeing if your issue continues to reproduce.
Asked by johnconn on 2019-08-18 10:43:28 UTC
Is it possible UDP multicast is disabled in the network? How can I check that? If so, is there a way to do it differently? I saw something like unicast and specifying ops in a XML file.
Asked by ahtsan on 2019-08-18 10:45:30 UTC
I modify opensplice settings here: /opt/ros/dashing/share/opensplice_cmake_module/config/ros_ospl.xml
but I don't know how to configure other impls
the folks here mentioned problems with multicast: https://blog.roverrobotics.com/ros-2-is-it-time-to-switch-tutorial-included/
Asked by johnconn on 2019-08-18 10:58:32 UTC
I think it's not the issue of ROS_DOMAIN_ID since it works under the ethernet but right after switching to the wifi it doesn't.
Asked by ahtsan on 2019-08-18 11:01:32 UTC
That sounds a lot like your traffic is being blocked on the wifi or it's still trying to route through the ethernet that was just unplugged.
Asked by tfoote on 2019-08-20 16:52:23 UTC