auto lo
iface lo inet loopback
	up ip addr add 10.9.99.1/32 dev lo
	down ip addr del 10.9.99.1/32 dev lo

iface vlan10 inet manual
    pre-up iptables-restore < /etc/network/firewall
    up ip link set up dev vlan10
    up ip addr add 198.51.100.13/26 brd + dev vlan10
    up ip route add default via 198.51.100.1 dev vlan10
    up ip -6 addr add 2001:db8:1998::19/120 dev vlan10
    up ip -6 route add default via 2001:db8:1998::1 dev vlan10
    down ip addr del 198.51.100.19/26 dev vlan10
    down ip -6 addr del 2001:db8:1998::19/120 dev vlan10
    down ip link set down dev vlan10