Make Changes Persistent on Linux

On Linux systems, unless you make network connection changes persistent, a system reboot resets the network connection changes and loses the host-to-radio connection. To retain the host-to-radio connection after a computer reboot, make the network connection changes to the host computer persistent by making these changes in the /etc/network/interfaces/etc/sysctl.conf, and /etc/security/limits.conf files.

• Edit /etc/network/interfaces to define settings for eth1. Use an IP address on the same subnet as your radio (that is, the same first three octets match those of your radio) and a unique value for the fourth octet. For more information, see Check Subnet Values on Host and Radio.

  auto eth1 
  iface eth1 inet static 
      address 192.168.30.1 
      netmask 255.255.255.0

• Edit /etc/sysctl.conf to add lines defining these settings for net.core.rmem_max and net.core.wmem_max.

  net.core.rmem_max=50000000
  net.core.wmem_max=33554432

  For more information, see https://files.ettus.com/manual/page_transport.html#transport_udp_linux.

• To define the maximum real-time scheduling priority rtprio, edit /etc/security/limits.conf and add this line. Use your group name in place of GROUP.

  @GROUP - rtprio 99

  To determine your group name, run this command in your Linux^® terminal.

  $ id -gn

  For more information, see https://files.ettus.com/manual/page_general.html#general_threading.

Related Topics

• Guided USRP Radio Support Package Hardware Setup
• Manual USRP Radio Support Package Hardware Setup