auto lo
iface lo inet loopback
	up ip addr add 2001:db8::ff/128 dev lo
	down ip addr del 2001:db8::ff/128 dev lo

auto lan
iface lan inet manual
	up ip link set up dev lan
	up ip addr add 2001:db8:0:1::ff/120 dev lan
	down ip addr del 2001:db8:0:1::ff/120 dev lan
	down ip link set down dev lan

auto ebgp_r11
iface ebgp_r11 inet manual
	up ip link set up dev ebgp_r11
	up ip addr add 2001:db8:0:3::ff/120 dev ebgp_r11
	down ip addr del 2001:db8:0:3::ff/120 dev ebgp_r11
	down ip link set down dev ebgp_r11