This README contains information how to establish an IPv6 connecton between Linux BLE router and an IPSP enabled BLE device. Prerequisites ============= In general, any device capable of running Linux operating system, can be used as a BLE router provided the following conditions are met: * Linux Kernel >3.18 is used * bluez, libcap-ng0, radvd tools are present. If a built-in Bluetooth device is not available then Bluetooth 4.0 compatible USB dongle can be used. The following procedures have been tested on Ubuntu 15.10. Establishing an IPv6 connection =============================== Use the following procedure to establish a connection between an nRF52 device and Linux router: First enable 6LoWPAN module. This is neccessary only once per session: # Log in as a root user. sudo su # Mount debugfs file system. mount -t debugfs none /sys/kernel/debug # Load 6LoWPAN module. modprobe bluetooth_6lowpan # Enable the bluetooth 6lowpan module. echo 1 > /sys/kernel/debug/bluetooth/6lowpan_enable # Look for available HCI devices. hciconfig # Reset HCI device - for example hci0 device. hciconfig hci0 reset # Read 00:AA:BB:XX:YY:ZZ address of the nRF5x device. hcitool lescan If you see device name and address in lescan output then you can connect to the device: echo "connect 00:AA:BB:XX:YY:ZZ 1" > /sys/kernel/debug/bluetooth/6lowpan_control If above is successful then LED1 will stop blinking and LED2 will switch on. You can then check the connection using the following commands: # Check if bt0 interface is present and up ifconfig # Try to ping the device using its link-local address, for example, on bt0 interface. ping6 fe80::2aa:bbff:fexx:yyzz%bt0 If you'd like to learn more about the procedure please refer to [Connecting devices to the router]. Distributing routable IPv6 prefix ================================= In Linux, Router Advertisement Daemon (RADVD) can be used to distribute prefixes in the network, hance configure routable IPv6 address. To configure RADVD create `/etc/radvd.conf` file and paste the following contents: interface bt0 { AdvSendAdvert on; prefix 2001:db8::/64 { AdvOnLink off; AdvAutonomous on; AdvRouterAddr on; }; }; Next, start RADVD daemon: # Set IPv6 forwarding (must be present). sudo echo 1 > /proc/sys/net/ipv6/conf/all/forwarding # Run radvd daemon. sudo service radvd restart If successfull then all devices connected to the host will receive a routable `2001:db8` prefix. This can be verified by sending echo request to the full address: ping6 -I bt0 2001:db8::2aa:bbff:fexx:yyzz where `aa:bbff:fexx:yyzz` is device Bluetooth address. If you'd like to learn more about the procedure please refer to [Distributing a global IPv6 prefix]. * [Connecting devices to the router]: http://developer.nordicsemi.com/nRF5_IoT_SDK/doc/0.9.0/html/a00089.html * [Distributing a global IPv6 prefix]: http://developer.nordicsemi.com/nRF5_IoT_SDK/doc/0.9.0/html/a00090.html