diff --git a/plugins/guests/debian/cap/change_host_name.rb b/plugins/guests/debian/cap/change_host_name.rb
index 6ce256d7e..fe01aed4f 100644
--- a/plugins/guests/debian/cap/change_host_name.rb
+++ b/plugins/guests/debian/cap/change_host_name.rb
@@ -9,6 +9,7 @@ module VagrantPlugins
               comm.sudo("sed -i 's/.*$/#{name.split('.')[0]}/' /etc/hostname")
               comm.sudo("hostname -F /etc/hostname")
               comm.sudo("hostname --fqdn > /etc/mailname")
+              comm.sudo("ifdown -a; ifup -a")
             end
           end
         end
diff --git a/plugins/guests/ubuntu/cap/change_host_name.rb b/plugins/guests/ubuntu/cap/change_host_name.rb
index db052e40f..3e84bc787 100644
--- a/plugins/guests/ubuntu/cap/change_host_name.rb
+++ b/plugins/guests/ubuntu/cap/change_host_name.rb
@@ -14,6 +14,7 @@ module VagrantPlugins
                 comm.sudo("service hostname start")
               end
               comm.sudo("hostname --fqdn > /etc/mailname")
+              comm.sudo("ifdown -a; ifup -a")
             end
           end
         end