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Select the desired port.

asked 2018-12-27 05:31:58 -0500

D0l0RES gravatar image

how to set a specific port (Ethernet) for publishing topics. I have 2 Ethernet ports, I want only one port to publish topics.

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@D0l0RES: please clarify why #q311530 is not a duplicate of this post.

gvdhoorn gravatar image gvdhoorn  ( 2018-12-27 08:38:00 -0500 )edit

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answered 2018-12-27 06:25:26 -0500

This is a networking question more than it is a ROS question. The answer is it depends on your computer's network configuration.

ROS publishes data to the whole of the network it's connected to, so if both of the ethernet ports on your computer connect to different parts of the same network then messages could be published over both ports. However if your computer is connected to two different networks then you control which one ROS connects to using the ROS_IP or ROS_HOSTNAME environment variables as described here.

Hope this helps.

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what if I have a need to publish data to different networks? it probably won't work like a belt one? or do you need to create several local areas in the global area and set network settings in them?

D0l0RES gravatar image D0l0RES  ( 2018-12-27 06:31:30 -0500 )edit

As far as I know ROS is only designed to work across a single network. There may be a solution with a VPN.

PeteBlackerThe3rd gravatar image PeteBlackerThe3rd  ( 2018-12-27 06:49:56 -0500 )edit

I'm on this subject wrote the question

D0l0RES gravatar image D0l0RES  ( 2018-12-27 07:00:41 -0500 )edit

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Asked: 2018-12-27 05:31:58 -0500

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Last updated: Dec 27 '18