The real devices in the periphery are not directly visible for the monitor system and the other BS2000 guest systems. BS2000 guest systems know only the BS2000 devices emulated in X2000. This means that BS2000 devices connected to SU x86 are always X2000 emulations of real devices, channel connections being emulated for BS2000.
BS2000 devices, i.e. the emulated devices, are configured exclusively via the SE Manager, see the “Operation and Administration” manual [19]. No hardware generation takes place in BS2000.
Device peripherals required
To prepare VM2000 operation, the devices which are to be provided for the VMs or guest systems must be configured.
A VM or its guest system requires at least:
One KVP device pair for guest system operating
Disks for the home pubset
Detecting the device peripherals
The available BS2000 device peripherals are detected dynamically by the monitor system and the BS2000 guest systems from the configuration data of X2000. This ensures that VM2000, the monitor system and all of the BS2000 guest systems know and manage the same device peripherals.
The configuration states for devices and connections in the monitor system and the BS2000 guest systems are preset or set via the startup parameter service (IOCONF parameter set), see the “Introduction to System Administration” [2].
Changes to the set of devices through a dynamic change to the I/O configuration (see "Dynamic I/O configuration modification") are automatically taken into account by VM2000.
Handling unknown device type codes
If a guest system (successor version) offers new device type codes, these are supported in the monitor system by means of an existing standard device type code. You will find more information in the relevant release notice.
Local and remote communication
For BS2000, ZASLAN and LOCLAN are (communication) devices used for the LAN connection to the physical network or for internal communication of the Server Unit. Each device must be assigned to the appropriate guest system. In addition, the communication paths must be configured in the BCAM of all guest systems.
LOCLAN
This port is emulated by X2000 and enables a LAN connection under VM2000 to the other VMs with BS2000 guest system which are also connected to LOCLAN, via TCP/IP. In addition, this establishes a local connection to X2000 with a gateway to the communication components which are connected there.
The package size can be up to 64 Kbytes with LOCLAN.
ZASLAN
To connect a VM to external hosts, the Ethernet Controller integrated into the Server Unit can be used (TCP/IP and ISO-LAN connections via Ethernet).
The package size can be up to 1,500 bytes for ZASLAN.