SymptomsVM on Parallels Server 5 Bare Metal cannot get a valid IP address after reverting to a snapshot made in Parallels Server 4 Bare Metal or any other old product (Parallels Desktop 5 or earlier, Parallels Server for Mac, etc.).
Both bridged and host-only network adapters cannot get an IP address.
CauseA special parameter called “Virtual Network ID” was absent from snapshots made in PSBM4 and other old products. So it is not set after reverting a VM to a snapshot made in one of those products.
ResolutionTo solve the issue please manually reconnect your virtual machine to a valid virtual network:
1. In Parallels Management Console shut down the VM and go open its configuration;
2. Go to Hardware tab -> and choose Network 1 device;
3. Select one of available network connection types (Routed/Bridged/Host-Only).