`console`: `` :: Select the default Console viewer. You can either use the builtin java applet (VNC), an external virt-viewer comtatible application (SPICE), or an HTML5 based viewer (noVNC). `email_from`: `` :: Specify email address to send notification from (default is root@$hostname) `fencing`: `` ('default =' `watchdog`):: Set the fencing mode of the HA cluster. Hardware mode needs a valid configuration of fence devices in /etc/pve/ha/fence.cfg. With both all two modes are used. + WARNING: 'hardware' and 'both' are EXPERIMENTAL & WIP `http_proxy`: `http://.*` :: Specify external http proxy which is used for downloads (example: 'http://username:password@host:port/') `keyboard`: `` :: Default keybord layout for vnc server. `language`: `` :: Default GUI language. `mac_prefix`: `(?^i:[a-f0-9]{2}(?::[a-f0-9]{2}){0,2}:?)` :: Prefix for autogenerated MAC addresses. `max_workers`: ` (1 - N)` :: Defines how many workers (per node) are maximal started on actions like 'stopall VMs' or task from the ha-manager. `migration`: `[type=] [,network=]` :: For cluster wide migration settings. `network`=`` ;; CIDR of the (sub) network that is used for migration. `type`=`` ('default =' `secure`);; Migration traffic is encrypted using an SSH tunnel by default. On secure, completely private networks this can be disabled to increase performance. `migration_unsecure`: `` :: Migration is secure using SSH tunnel by default. For secure private networks you can disable it to speed up migration. Deprecated, use the 'migration' property instead!