####Prepare
opkg install ipv6calc ip rdisc6
/etc/config/network
config interface 'vpn'
...
option ipv6 '1'
option send_rs '0'
/etc/sysctl.conf
net.ipv6.conf.all.forwarding = 1
####Install
Copy files directly or make package:
cd attitude_adjustment
cd packages
git clone git://github.com/sigwall/bee6d.git
cd ..
make package/bee6d/compile
make package/bee6d/install
####Configure
/etc/config/bee6d
config interface "vpn"
option "laniface" "lan"
####Run
/etc/ppp/ip-up.d/bee6d.sh script installed automatically.
Manual run: bee6d -i l2tp-vpn
or bee6d -p vpn
Enjoy.