Why routes are deleted using VLP16 and RVIZ ?

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Hi,

We are trying to visualize in realtime the VLP-16 data in RVIZ.

Our config :

• Ubuntu 14.04
• ROS indigo
• Velodyne VLP-16

We launch in several terminals these following commands :

TTY0 :

$ sudo route add 192.168.1.201 eth0
$ roscore

TTY1 :

$ roslaunch velodyne_pointcloud VLP16-points.launch

TTY2 :

$ rosrun velodyne_pointcloud cloud_node _calibration:=($mypath)/VLP16db.yaml

TTY3 :

$ rosrun rviz rviz -f velodyne

We can see it real time for like a few minutes, and then it freezes.

When we look at the route -n command the velodyne route (192.168.1.201) is gone.

After this, if we enter the : sudo route add 192.168.1.201 eth0 command again, rviz shows data correctly in realtime.

Any ideas why the route disappears ?

Thank you in advance for any help you can provide.