Installation guide

The following sections provide basic information for each task of each IBM System z network
device driver.
6.2.1. Working With the LCS Device Driver
The LAN channel station (LCS) device driver supports OSA-2 Ethernet/Token Ring, OSA-
Express Fast Ethernet in non-QDIO mode, and OSA-Express High Speed Token Ring in non-
QDIO mode. For z990, the LCS driver also supports Gigabit Ethernet in non-QDIO mode
(including 1000Base-T).
Based on the type of interface being added, the LCS driver assigns one of two base interface
names: ethn for OSA-Express Fast Ethernet and Gigabit Ethernet trn for Token Ring, where 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 lcs
• Create the group device:
# echo read_device_bus_id,write_device_bus_id >
/sys/bus/ccwgroup/drivers/lcs/group
Due to the length of this command, it has been broken into two lines.
• Configure the device.
OSA cards can provide up to 16 ports for a single CHPID. By default, the LCS group device
uses port 0. To use a different port, issue a command similar to the following:
# echo portno > /sys/bus/ccwgroup/drivers/lcs/device_bus_id/portno
For more information about configuration of the LCS driver, refer to the following:
http://www- 128.ibm.com/developerworks/linux/linux390/october2005_documentation.html#3
(Linux for IBM System z and S/390 Device Drivers, Features, and Commands)
• Set the device online:
# echo 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 similar to
one of the following:
ethn alias lcs
trn alias lcs
• Create a configuration script.
Create a file in /etc/sysconfig/network-scripts/ with a name like one of the following:
6.2. Quick Reference for Adding Network Devices
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