Keep old interface names

recipes/networkd.rb

@@ -26,6 +26,14 @@ if node['platform_version'].to_i >= 9 && !node['sys']['networkd'].empty?
   delete = Dir.glob('/etc/systemd/network/*')
   keep = []
 
+  keep << '99-default.link' unless node['sys']['networkd']['preditcable_interface_names']
+  sys_systemd_unit '99-default.link' do
+    directory '/etc/systemd/network'
+    action :mask
+    not_if { node['sys']['networkd']['predictable_interface_names'] }
+  end
+
+
   if node['sys']['networkd']['make_primary_interface_persistent']
     # This uses ohai data, so any manual change to the network interface
     # will be made permanent. This flag is intended to be used by a one-time