==== SB2 ====
[[TOC(Hardware, Hardware/bDomains, Hardware/bDomains/cSandboxes*, depth=6)]]

===== RF Connections =====
 The X310's connected to the nodes in this sandbox are interconnected via coax cables as follows with a 30dB attenuator on the TX/RX side of each link for protection. This setup is designed to facilitate FDD dependent experiments.

 [[Image(SB2 X310 Connections.png)]]

[[BR]]
===== Networking Setup (eth2) =====
 Each X310 is connected to its respective node through a 10G interface adapter installed in Port 1 of the USRP. In this configuration, the X310 will have a default IP address of 192.168.40.2 (see [http://files.ettus.com/manual/page_usrp_x3x0.html#x3x0_setup_network_host_interface X310 User Manual]). To setup network connectivity, make sure eth2 is configured with an address in the 192.168.40.0/24 subnet .


[[BR]]
===== Using images based on baselines before June 12, 2017 =====
 Images built using baselines prior to June 9, 2017 may not work correctly. After imaging, the node may not be accessible via SSH due to the add-on NIC (for X310 connectivity) changing the order of the ethernet interfaces. To repair your image, connect to the node via the [wiki:Hardware/jCM/dCM3/dUsage#SerialConsoleoverTelnettunnel CM serial console] and run the following commands.
{{{
if ! grep -i "blacklist mlx4_core" /etc/modprobe.d/blacklist.conf; then echo "blacklist mlx4_core" >> /etc/modprobe.d/blacklist.conf; fi

if ! grep -i "mlx4_core" /etc/modules; then echo "mlx4_core" >> /etc/modules; fi

depmod -a

update-initramfs -u

reboot
}}}