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Devstack networking/can't ping instances


I am facing a problem how to set up network correctly while using ubuntu 17.10 in virtualbox. I have problem with pinging my instances from host PC and even from guest VM. Same problem in instances, they can't ping VMs or host pc. In virtualbox I am using 3 network adapters (NAT for internet access, 2x host only network paravirtualized [one for communication between nodes another one was meant to be public interface for instances]).


# The loopback network interface
auto lo
iface lo inet loopback

# VirtualBox NAT -- for Internet access to VM
auto enp0s3
iface enp0s3 inet dhcp

auto enp0s8
iface enp0s8 inet static

auto enp0s9
iface enp0s9 inet manual
        up ip link set dev $iface up
        down ip link set dev $iface down

And devstack local.conf was from this page (tried all of them):