Amazon EC2 VPC multiple IP setup under Ubuntu Linux (With multiple virtual interfaces on the same subnet) Put vpc.sh into your ip-up.d directory and then update your /etc/network/interfaces to have all virtual adapters. Then it's a matter of sudo /etc/init.d/networking restart

interfaces

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

# etc

vpc.sh

#!/bin/bash
# put this in /etc/network/if-up.d/100vpc and make it executable

TABLE=$((${IFACE:(-1)}+1))
ip route add default via 10.0.0.1 dev $IFACE tab $TABLE
MAC_ADDR=$(ifconfig $IFACE | sed -n 's/.*HWaddr \([a-f0-9:]*\).*/\1/p')
IP=$(curl http://169.254.169.254/latest/meta-data/network/interfaces/macs/$MAC_ADDR/local-ipv4s)
for ip in $IP; do
    echo "Adding IP: $ip"
    ip addr add $ip/24 dev $IFACE
    ip rule add from $ip/32 table $TABLE
done
 
ip route flush cache