multiple dhcp ips on a single interface

I bought orange pi one and I mount ubuntu 18.04. I and my friend setup as below. but we can didn't ping. ping -c 4 -I vir1 [login to view URL] and we don't know it is right or fault. so, can you fix our fault? /etc/network/interfaces # Primary interface auto eth0 iface eth0 inet dhcp up ip link set dev eth0 promisc on # Macvlan interfaces auto vir1 iface vir1 inet dhcp pre-up ip link add link eth0 address 02:cd:ab:00:10:01 vir1 type macvlan post-down ip link delete vir1 auto vir2 iface vir2 inet dhcp pre-up ip link add link eth0 address 02:cd:ab:00:10:02 vir2 type macvlan post-down ip link delete vir2 pptpd setup sudo apt-get install pptpd local/remote ip /etc/[login to view URL] localip [login to view URL] remoteip 192.168.0.100-200 DNS /etc/ppp/pptpd-options ms-dns 8.8.8.8 ms-dns 8.8.4.4 ADD USER /etc/ppp/chap-secrets cbd pptpd 1234 [login to view URL] cbd2 pptpd 1234 [login to view URL] NAT iptables -t nat -A POSTROUTING -s [login to view URL] -o vir1 -j MASQUERADE iptables -t nat -A POSTROUTING -s [login to view URL] -o vir2 -j MASQUERADE /etc/[login to view URL] /sbin/iptables-restore < /etc/[login to view URL] IP forwarding /etc/[login to view URL] net.ipv4.ip_forward=1 sudo sysctl -p MTU /etc/ppp/[login to view URL] ifconfig $1 mtu 1500 sudo chmod a+x /etc/ppp/[login to view URL] sudo pptpd restart And, my final goal is that use many ip throuth pptp. When I receive same subnet ips. Does that also have no problem?