25.3.3. 對映子頻道和網路裝置名稱

ifcfg 檔案中的 DEVICE= 選項無法用來映射子頻道至網路裝置名稱。反之，udev 規則檔案 /etc/udev/rules.d/70-persistent-net.rules 可用來設置哪個網路裝置頻道將擁有哪個網路裝置名稱。
當在 System z 上配置新網路裝置時，系統會自動地新增規則至檔案上，並指定下一組未使用的裝置名稱。您接著便可編輯指定給各個裝置的 NAME= 變數的值。
/etc/udev/rules.d/70-persistent-net.rules 的範例內容： 
# This file was automatically generated by the /lib/udev/write_net_rules
# program run by the persistent-net-generator.rules rules file.
#
# You can modify it,as long as you keep each rule on a single line.
# S/390 qeth device at 0.0.f5f0
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.f5f0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# S/390 ctcm device at 0.0.1000
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="ctcm", KERNELS=="0.0.1000", ATTR{type}=="256", KERNEL=="ctc*", NAME="ctc0"
# S/390 qeth device at 0.0.8024
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.8024", ATTR{type}=="1", KERNEL=="hsi*", NAME="hsi0"
# S/390 qeth device at 0.0.8124
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.8124", ATTR{type}=="1", KERNEL=="hsi*", NAME="hsi1"
# S/390 qeth device at 0.0.1017
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.1017", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"
# S/390 qeth device at 0.0.8324
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.8324", ATTR{type}=="1", KERNEL=="hsi*", NAME="hsi3"
# S/390 qeth device at 0.0.8224
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.8224", ATTR{type}=="1", KERNEL=="hsi*", NAME="hsi2"
# S/390 qeth device at 0.0.1010
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.1010", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"
# S/390 lcs device at 0.0.1240
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="lcs", KERNELS=="0.0.1240", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
# S/390 qeth device at 0.0.1013
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="qeth", KERNELS=="0.0.1013", ATTR{type}=="1", KERNEL=="hsi*", NAME="hsi4"