Red Hat ENTERPRISE LINUX AS 2.1 - Installationsanleitung PDF herunterladen (Seite 47)

Appendix B.

Sample Parameter Files

The IBM S/390(R) and IBM eServer zSeries(R) architectures use a special parameter ﬁle to set up

networking before the installation program (anaconda) can be started. This section describes the

contents of the parameter ﬁle.

The parameter ﬁle has a limit of 32 total parameters. To accommodate limitations of the parame-

ter ﬁles, a new conﬁguration ﬁle on a CMS DASD should be used to conﬁgure the initial network

setup and the DASD speciﬁcation. The .parm ﬁle should contain the real kernel parameters, such

as root=/dev/ram0 ro ip=off ramdisk_size=40000, and single parameters which are

not assigned to variables, such as vnc. Two new parameters which point the installation program at

the new conﬁguration ﬁle need to be added to the .parm ﬁle. They are CMSDASD and CMSCONF.

CMSDASD=<cmsdasd_address>

Where <cmsdasd_address> represents the list of the device ID of the CMS DASD device

which contains the conﬁguration ﬁle. This is usually the CMS user’s ’A’ disk. This option is

applicable only for users who have a CMS formatted disk (z/VM) available.

For example: CMSDASD=191

CMSCONFFILE=<configuration_file>

Where <configuration_file> represents the name of the conﬁguration ﬁle. This value

must be speciﬁed in lower case. It is speciﬁed in a Linux style ﬁle name format. The CMS ﬁle

REDHAT CONF is speciﬁed as redhat.conf. This option is applicable only for users who have

a CMS formatted disk (z/VM) available.

For example: CMSCONFFILE=redhat.conf

DASD=<dasd-list>

Where <dasd-list> represents the list of DASD devices to be used by Red Hat Enterprise

Linux.

Although automatic probing for DASDs is done if this parameter is omitted, it is highly recom-

mended to include the DASD= parameter, as the device numbers (and therefore the device names)

can vary when a new DASD is added to the Red Hat Enterprise Linux guest. This can result in

an unusable system.

For example: DASD=0.0.0100,0.0201-0.0.0204

The following parameters are required to set up networking:

SUBCHANNELS=

Provides required device bus IDs for the various network interfaces.

qeth: SUBCHANNELS="<read_device_bus_id>,<write_device_bus_id>,

<data_device_bus_id>"

lcs: SUBCHANNELS="<read_device_bus_id>,<write_device_bus_id>"

ctc: SUBCHANNELS="<read_device_bus_id>,<write_device_bus_id>"

Due to the length of the qeth command line, it has been broken

into two lines.

For example (a sample qeth SUBCHANNEL statement):

SUBCHANNELS=0.0.0600,0.0.0601,0.0.0602

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Red Hat ENTERPRISE LINUX AS 2.1 - Installationsanleitung Seite 47