interface ipv6設定

記錄一下：
vim /etc/network/interface
auto eth0
iface eth0 inet static
address 163.20.108.215
netmask 255.255.255.0
gateway 163.20.108.254
dns-nameservers 163.20.108.1 203.72.153.6 168.95.1.1

iface eth0 inet6 static
address 2001:288:2263::215
netmask 48
gateway 2001:288:2263:5::FF