Hi! Let me start by stating that the mailing list you've posted is deprecated, and should have been closed. vdsm-users-related discussion should take place on users(a)ovirt.org. The motivation for the semicolons was to eliminate the (albeit remote) chance of of this bridge name colliding with a previously-defined network. It was introduced two years ago http://gerrit.ovirt.org/9562 and it is a bit two entrenched by now. Modifying it to another string, while it is used by multiple VM in a distributed cluster of host is a painful hassle. It would be much more advisable for puppet to support all device names acceptable by Linux (anything but ':. \t\0', without adding its own limitations. I have a vague memory that Foreman encountered the same problem, and fixed it. Regards, Dan.