なぜ eth が eth0 、eth1、eth2 に 変化するのか という事で 少し調べると。
”/etc/udev/rules.d/70-persistent-net.rules”ファイルが 関係している様です。 まあ ３台の計算機を 起動させると その結果は 以下の様になっていました。
# 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, and change only the value of the NAME= key.
/* 適当に改行しています */
# PCI device 0x14e4:/sys/devices/pci0000:00/0000:00:1c.5/0000:3f:00.0 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", \
ATTR{address}=="00:25:b3:d1:fe:cc", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
/* ifconfig -a から 得られる部分 HWaddr 00:25:b3:d1:fe:cc */
# PCI device 0x14e4:/sys/devices/pci0000:00/0000:00:1c.5/0000:3f:00.0 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", \
ATTR{address}=="18:a9:05:c1:e1:1d", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
# PCI device 0x10de:/sys/devices/pci0000:00/0000:00:0f.0 (forcedeth)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", \
ATTR{address}=="00:22:68:66:8b:12", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"
/* ifconfig -a から 得られる部分 HWaddr 00:22:68:66:8b:12 */
なにか ”ATTR{address}=”というのが 異なると 新しく追加するようです。
これは log を 残したものの 抜粋 ですが 以下の様な log が 残る
# pwd /var/log # ls | grep 70-persistent-net.rules 20140314210214_70-persistent-net.rules 20140314210725_70-persistent-net.rules 20140314211424_70-persistent-net.rules # cat 20140314210214_70-persistent-net.rules # 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, and change only the value of the NAME= key. # PCI device 0x14e4:/sys/devices/pci0000:00/0000:00:1c.5/0000:3f:00.0 (tg3) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:b3:d1:fe:cc", \ ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # cat 20140314210725_70-persistent-net.rules # 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, and change only the value of the NAME= key. # PCI device 0x10de:/sys/devices/pci0000:00/0000:00:0f.0 (forcedeth) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:22:68:66:8b:12", \ ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # cat 20140314211424_70-persistent-net.rules # 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, and change only the value of the NAME= key. # PCI device 0x14e4:/sys/devices/pci0000:00/0000:00:1c.5/0000:3f:00.0 (tg3) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="18:a9:05:c1:e1:1d", \ ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# ifconfig -a eth0 Link encap:Ethernet HWaddr 00:25:b3:d1:fe:cc inet addr:192.168.0.5 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::225:b3ff:fed1:fecc/64 Scope:Link ... # ifconfig -a eth0 Link encap:Ethernet HWaddr 00:22:68:66:8b:12 inet addr:192.168.0.62 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::222:68ff:fe66:8b12/64 Scope:Link ... # ifconfig -a eth0 Link encap:Ethernet HWaddr 18:a9:05:c1:e1:1d inet addr:192.168.0.62 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::1aa9:5ff:fec1:e11d/64 Scope:Link ...
まあ log を 気を付けて 置かないといけないが 良 としませう。
# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sdc2 12483376 9042904 2811276 89% /mnt ...
にゃんたろう 拝！
2014年 3月 15日 土曜日 22:11:12 JST 作成