Networking

Ubuntu 22.04 LTS LPAR mode z/VM guest KVM guest

Ubuntu Server 22.04 LTS 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

Restrictions

For prerequisites and restrictions see the IBM® LinuxONE and IBM Z® architecture-specific information in the Ubuntu Server 22.04 LTS release notes at https://discourse.ubuntu.com/t/jammy-jellyfish-release-notes

Example

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

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 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 driversA list of 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
1732/05	1731/05	qeth	HiperSockets
0000/00	3088/1f	lcs	2216 Nways Multiaccess Connector
0000/00	3088/60	lcs	OSA configured as OSE (non-QDIO)