diff --git a/vagrant--devstack/Makefile b/vm-1.devstack/Makefile
similarity index 100%
rename from vagrant--devstack/Makefile
rename to vm-1.devstack/Makefile
diff --git a/vagrant--devstack/README.md b/vm-1.devstack/README.md
similarity index 100%
rename from vagrant--devstack/README.md
rename to vm-1.devstack/README.md
diff --git a/vagrant--devstack/Vagrantfile b/vm-1.devstack/Vagrantfile
similarity index 50%
rename from vagrant--devstack/Vagrantfile
rename to vm-1.devstack/Vagrantfile
index c7e0c29..7a55a7f 100644
--- a/vagrant--devstack/Vagrantfile
+++ b/vm-1.devstack/Vagrantfile
@@ -2,24 +2,24 @@
 # frozen_string_literal: true
 
 Vagrant.configure('2') do |config|
-  config.vm.box = 'debian/bullseye64'
+  config.vm.box = 'debian/bookworm64'
 
   config.vm.provider 'libvirt' do |domain|
-    domain.memory = 18_000
+    domain.memory = 12_000
     domain.nested = true
     # domain.cpus = 2
   end
 
   config.vm.provider 'virtualbox' do |vb|
     vb.gui = false
-    vb.memory = 18_000.to_s
+    vb.memory = 12_000.to_s
     # vb.nested = true
     vb.customize ['modifyvm', :id, '--nested-hw-virt', 'on']
   end
 
-  # config.vm.synced_folder "..", "/vagrant" #, type: "nfs", mount_options: ['actimeo=2']
-  # config.vm.synced_folder "../../exercises", "/vagrant/exercises" #, type: "nfs", mount_options: ['actimeo=2']
-  # config.vm.synced_folder "../../config", "/vagrant/config" #, type: "nfs", mount_options: ['actimeo=2']
+  # config.vm.synced_folder '..', '/vagrant' #, type: 'nfs', mount_options: ['actimeo=2']
+  # config.vm.synced_folder '../../exercises', '/vagrant/exercises' #, type: 'nfs', mount_options: ['actimeo=2']
+  # config.vm.synced_folder '../../config', '/vagrant/config' #, type: 'nfs', mount_options: ['actimeo=2']
 
   config.vm.define 'control' do |machine|
     machine.vm.hostname = 'control'
@@ -28,14 +28,14 @@ Vagrant.configure('2') do |config|
       machine.vm.network 'forwarded_port', guest: port, host: port, host_ip: '127.0.0.1'
     end
     machine.vm.network 'forwarded_port', guest: 80, host: 1080, host_ip: '127.0.0.1'
-    # machine.vm.network "public_network", bridge: 'dummy0', auto_config: false
-    # machine.vm.network "public_network", dev: "br25", type: "bridge", auto_config: false
-    machine.vm.network "private_network", ip: "192.168.56.21", name: "vagrant0"
-    machine.vm.network "private_network", ip: "192.168.57.21", name: "vagrant1"
-    machine.vm.network "private_network", ip: "192.168.58.21", name: "vagrant2"
+    # machine.vm.network 'public_network', bridge: 'dummy0', auto_config: false
+    # machine.vm.network 'public_network', dev: 'br25', type: 'bridge', auto_config: false
+    machine.vm.network 'private_network', ip: '192.168.56.21', name: 'vagrant0'
+    machine.vm.network 'private_network', ip: '192.168.57.21', name: 'vagrant1'
+    machine.vm.network 'private_network', ip: '192.168.58.21', name: 'vagrant2'
   end
 
-  config.vm.provision 'shell', name: 'provision/base', path: 'provision/base.sh', privileged: true 
+  config.vm.provision 'shell', name: 'provision/base', path: 'provision/base.sh', privileged: true
   config.vm.provision 'shell', name: 'provision/openstack', path: 'provision/openstack.sh', privileged: false
-  config.vm.provision 'shell', inline: 'echo "SUCCESS"'
+  config.vm.provision 'shell', inline: 'echo SUCCESS'
 end
diff --git a/vm-1.devstack/alt/Vagrantfile b/vm-1.devstack/alt/Vagrantfile
new file mode 100644
index 0000000..3006308
--- /dev/null
+++ b/vm-1.devstack/alt/Vagrantfile
@@ -0,0 +1,26 @@
+# vim: set ts=2 sw=2 et ft=ruby:
+# frozen_string_literal: true
+
+Vagrant.configure('2') do |config|
+  config.vm.box = 'debian/bookworm64'
+
+  config.vm.provider 'libvirt' do |domain|
+    domain.memory = 8_000
+    domain.nested = true
+    # domain.cpus = 2
+  end
+
+  # config.vm.synced_folder '..', '/vagrant' #, type: 'nfs', mount_options: ['actimeo=2']
+  # config.vm.synced_folder '../../exercises', '/vagrant/exercises' #, type: 'nfs', mount_options: ['actimeo=2']
+  # config.vm.synced_folder '../../config', '/vagrant/config' #, type: 'nfs', mount_options: ['actimeo=2']
+
+  config.vm.define 'control' do |machine|
+    machine.vm.hostname = 'control'
+
+    machine.vm.network 'public_network', ip: '192.168.253.253', dev: 'svc0'
+  end
+
+  # config.vm.provision 'shell', name: 'provision/base', path: 'provision/base.sh', privileged: true
+  # config.vm.provision 'shell', name: 'provision/openstack', path: 'provision/openstack.sh', privileged: false
+  # config.vm.provision 'shell', inline: 'echo SUCCESS'
+end
diff --git a/vagrant--devstack/provision/base.sh b/vm-1.devstack/provision/base.sh
similarity index 100%
rename from vagrant--devstack/provision/base.sh
rename to vm-1.devstack/provision/base.sh
diff --git a/vagrant--devstack/provision/openstack.sh b/vm-1.devstack/provision/openstack.sh
similarity index 93%
rename from vagrant--devstack/provision/openstack.sh
rename to vm-1.devstack/provision/openstack.sh
index 321ef41..4539743 100755
--- a/vagrant--devstack/provision/openstack.sh
+++ b/vm-1.devstack/provision/openstack.sh
@@ -93,7 +93,8 @@ disable_service tempest
 enable_plugin mistral https://opendev.org/openstack/mistral
 
 ## Enable designate
-enable_plugin designate https://opendev.org/openstack/designate
+## (buggy according to https://bugs.launchpad.net/designate/+bug/2036402)
+# enable_plugin designate https://opendev.org/openstack/designate
 MARK
 
 ##