Networking

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6.6 LPAR mode z/VM guest KVM guest

Linux® on IBM® Z includes several network device drivers that are specific to z/Architecture®.

For information about high-performing, secure networking and connectivity, see
www.ibm.com/it-infrastructure/z/capabilities/networking

Example

Figure 1. Networking example
This graphic is described in the text that follows

In the example there are three Linux instances; two of them run as z/VM® guests in one LPAR and a third Linux instance runs in another LPAR. Within z/VM, Linux instances can be connected directly by IUCV, virtual-CTC, or through a guest LAN or VSWITCH. Within and between LPARs, you can connect Linux instances through HiperSockets. OSA-Express cards running in either non-QDIO mode (called LCS here) or in QDIO mode can connect the mainframe to an external network.

Table 1 lists which control units and device type combinations are supported by the network device drivers.

Table 1. Supported device types, control units, and corresponding device drivers
Device type Control unit Device driver Comment
1732/01 1731/01 qeth OSA configured as OSD
1732/02 1731/02 qeth OSA configured as OSX
1732/03 1731/02 qeth OSA configured as OSM
1732/05 1731/05 qeth HiperSockets
0000/00 3088/08 ctcm Virtual CTC under z/VM
0000/00 3088/1e ctcm FICON® channel
0000/00 3088/1f ctcm ESCON channel
0000/00 3088/60 lcs OSA configured as OSE (non-QDIO)