Revision history [back]

My problem turned out to be that i was exporting the wrong ROS_IP address on the 2nd machine.

After editing the /etc/hosts file on the 2nd machine to include the host machine, and exporting the ROS_MASTER_URI=http://hostalias:11311 (on the machine not running roscore) you need to export the proper ROS_IP's on BOTH machines so ROS knows where to listen. To do this:

1. Identify the IP address of each machine
2. export ROS_IP=ipaddress of each machine in any terminal you use to communicate with ROS. Make sure that you are exporting the IP address of the respective machine. My problem was that i was exporting the host computer's IP address in both machines!

After taking those steps you should be able to both publish, and subscribe to topics from a 2nd machine.

Hope that helps!