snIPL (simple network IPL) V.2.3.0

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>2013-09-30 snIPL V.2.3.0 (Development stream)

This snIPL V.2.3.0 adds new command sncap and replaces all previous versions of snIPL.

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snipl- MD5 recommended (2013-09-30)

This version supersedes all previous snIPL versions.

This version contains the following snIPL changes compared to snIPL V.2.2.1:

  • new application sncap was included in the snIPL package.
  • default password feature in the snipl command's '-p' option is deprecated and will be removed in a subsequent release.

The snIPL package contains two commands snipl and sncap.

snIPL - simple network IPL is a command line tool which serves as remote linux image control using basic Support Element (SE) functions or basic z/VM system management functions on one or more images. In particular, you can use snIPL to activate and deactivate virtual System z hardware.

  • With snIPL in LPAR mode you can load (IPL) an LPAR from a disk device, send commands to the operating system and retrieve operating system messages; or reset, activate, or deactivate an LPAR for I/O fencing purposes.

  • With snIPL in z/VM mode you can log on, reset, or log off a z/VM guest virtual machine.

    snIPL can access the systems management API through a z/VM SMAPI request server available as of z/VM 5.3.

    For z/VM 4.4 to z/VM 5.4 snIPL can access the systems management API through a VSMSERVE service machine on your z/VM system.

    For setup information see README.snipl.

    For further details see z/VM Systems Management Application Programming (SC24-6234) or z/VM V5R4.0 Systems Management Application Programming (SC24-6122-02) (or equivalent documentation from the z/VM website:

  • snIPL for STONITH provides a STONITH plug-in. The STONITH implementation is part of Cluster Glue. Cluster Glue is a set of libraries, tools, and utilities for the Heartbeat and Pacemaker cluster stack of the High Availability Project. STONITH is usually used as part of this framework but can also be used independently.

    For a general description of the STONITH technique see:
    For a general description of Cluster Glue see:

    The latest STONITH release can be downloaded from

    With snIPL for STONITH you can activate, deactivate, and reset Linux instances in LPAR mode or running as z/VM guests.

    snIPL for Stonith supports the remote image operations activate, deactivate, and reset, exploiting basic System z Hardware Management Console (HMC) and Support Element (SE) functions for Linux running in an LPAR and of basic z/VM System Management Functions for Linux running under control of z/VM.

    To compile and use the STONITH plugin lic_vps, you require two header files
    /usr/include/pils/plugin.h and /usr/include/stonith/stonith.h.
    You can find these header files in the Cluster Glue package of the Linux High Availability project

    Note: As of version 2.1.3, snIPL supports STONITH version 2 only. Older snIPL versions support STONITH version 1 only.

sncap - simple network capacity management is a command line tool which allows to dynamically change Central Processing Complex (CPC) processing unit capacity from Linux environment using Support Element (SE) functions. In particular, you can use sncap to activate or deactivate temporary capacity records and query the temporary capacity record or CPC state information.

Note: sncap supports SE versions starting from 2.10.0.

snIPL in LPAR mode and sncap use the management application programming interfaces (APIs) provided by the HMC or SE. To communicate with the HMC/SE, snIPL and sncap establish an SNMP network connection to send and retrieve data. The HMC or SE has to be configured to allow the Linux instance where snIPL or sncap runs to access the API. If your network is firewall-controlled, udp-port 161 and tcp-port 3161 have to be opened between Linux system invoking snIPL or sncap and HMC/SE.

To compile and run snIPL in LPAR mode or sncap, they must be linked to the management library hwmcaapi (which can be downloaded from IBM Resource Link

For further details please refer to System z Application Programming Interfaces (SB10-7030) | (PDF, 1.1MB).

Please refer to the README.snipl and the manpages in the tarball for further information about the snipl and sncap applications.