Red Hat ENTERPRISE LINUX AS 2.1 - Instalační příručka stáhnout pdf (Strana 77)

Appendix F. Additional Information for S/390 and zSeries Users 69

F.6.2.3. Working With the CTC Device Driver

A Channel-to-Channel (CTC) connection is the typical high speed connection between mainframes.

The CTC device driver can be used to establish a point-to-point TCP/IP or tty connection between two

Linux for zSeries and S/390 instances or between a Linux for zSeries and S/390 instance and another

mainframe operating system instance such as z/OS, OS/390, z/VM, or z/VSE.

The CTC driver assigns a base interface name like the following:

ctc<n>

The value <n> is an integer that uniquely identiﬁes the device. <n> is 0 for the ﬁrst device of that

type, 1 for the second, and so on.

• Load the device driver:

# modprobe ctc

• Create the group device:

# echo <read_device_bus_id>,<write_device_bus_id>

> /sys/bus/ccwgroup/drivers/ctc/group

Due to the length of this command, it has been broken into two lines.

• Conﬁgure the device.

Set the protocol:

# echo <protocol> /sys/bus/ccwgroup/drivers/ctc/<device_bus_id>/protocol

Where <protocol> is 0, 1, 2, or 3.

0 — This protocol provides compatibility with peers other than OS/390, or z/OS, for example, a

VM TCP service machine. This is the default.

1 — This protocol provides enhanced package checking for Linux peers.

2 — This protocol provides a CTC-based tty connection with a Linux peer.

3 — This protocol provides compatibility with OS/390 or z/OS peers.

For more information about conﬁguration of the CTC driver, refer to the following:

http://oss.software.ibm.com/developerworks/opensource/linux390/docu/lx26apr04dd01.pdf

(Linux for zSeries and S/390 Device Drivers, Features, and Commands)

• Set the device online:

# cho 1 /sys/bus/ccwgroup/drivers/lcs/<read_device_bus_id>/online

• Deﬁne the alias.

Based on the type interface being added, add a line to /etc/modprobe.conf that is like the

following:

ctc<n> alias ctc

• Create a conﬁguration script.

Create a ﬁle in /etc/sysconfig/network-scripts/ with a name like the following:

ifcfg-ctc<n>

The ﬁle should look like the following:

/etc/sysconfig/network-scripts/ifcfg-ctc0

# IBM CTC

DEVICE=ctc0

BOOTPROTO=static

IPADDR=192.168.70.136

GATEWAY=172.16.70.136

NETMASK=255.255.255.255

ONBOOT=yes

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