Add a section for network config recommendation (#388)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -10,7 +10,7 @@ assignees: ''
 > **IMPORTANT**  
 > Before reporting a new bug make sure you have:
 > - [ ] Checked existing issues https://github.com/ouster-lidar/ouster-ros/issues
-> - [ ] Checked existing issues https://github.com/ouster-lidar/ouster-ros/issues
+> - [ ] Checked existing discussions https://github.com/ouster-lidar/ouster-ros/discussions
 > - [ ] Checked ouster community https://community.ouster.com/
 > If you couldn't find relevant information and you think this is rather a driver 
 > problem then proceed with bug reporting.

README.md

@@ -128,6 +128,12 @@ roslaunch ouster_ros driver.launch      \
 `driver.launch` offers better performance and reduced overhead on the ROS bus, thus it is preferred
 over `sensor.launch`. `sensor.launch` is mainly provided for backward compatibilty.
 
+> **Note**:
+> If you observe parts of the scan missing is missing, this suggests having a lots of dropped packets
+> It is recommended that you increase the maximum allowed size for receive memory buffers in network
+> subsystem, you can do so by running the script `network-configure.bash` under `util`.
+
+
 #### Recording Mode
 > Note
 > As of package version 8.1, specifiying metadata file is optional since the introduction of the

util/network-configure.bash

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# kernel receive buffer size
+sudo sysctl -w net.core.rmem_max=16777216
+sudo sysctl -w net.core.rmem_default=16777216
+
+## in addition you can try increasing the receive buffer size
+# sudo ethtool -G <sensor_network_interface> rx 2048
+
+## increase the MTU size to 9000 to decrease fragmentation
+# sudo ifconfig <sensor_network_interface> mtu 9000