Vagrant/libvirt does not assign a given static ip

[Aurélien]

Hello,

I want to setup a node with Vagrant/Libvirt with a static ip accessible only from the host. Here my config :

# -*- mode: ruby -*-
# vi: set ft=ruby :

ENV['VAGRANT_DEFAULT_PROVIDER'] = 'libvirt'

Vagrant.configure("2") do |config|
 config.vm.box = "debian/stretch64"
 config.vm.network "private_network", ip: "10.20.30.40"

 config.vm.provider "libvirt" do |v|
 v.memory = 4096
 v.cpus = 1
 end

 config.vm.provision "shell", inline: <<-SHELL
 apt-get update
 apt-get upgrade -y
 apt-get install -y net-tools htop apt-transport-https curl iftop
 SHELL 
end

I am using the vagrant up and vagrant ssh. Then if I do sudo ifconfig, I am getting inet 10.20.30.57.

I obtain an ip with the correct three first digits, but the last one is randomly chosen. Seems like Vagrant is only considering the ip as a network with 255.255.255.0 mask and acts as dhcp to choose an ip from the network.

What am I doing wrong ?

I am under Ubuntu 16.04 and using Vagrant 2.0.2 and libvirt 1.3.1

Thanks for the help.

[Alvaro Miranda Aguilera]

whats the output of

ifconfig -a

route -n

in the guest ?

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Alvaro