本文解释了在Linux系统中，udev如何根据MAC地址自动映射网络接口设备到ethX，并提供了配置文件/etc/udev/rules.d/70-persistent-net.rules的具体示例。当更换网卡或移动PCI插槽时，该机制确保网络接口名称的一致性。
/proc/net/dev shows "eth1" not "eth0"
Have you ever had a different NIC in this machine? If so this could be
a udev issue. When udev sees a nic it maps the MAC address to an ethX.
If it sees a new MAC address it will map it to a different ethX, even if
the original nic is no longer present. This is actually a good thing,
and fixes the wandering NIC/ethX issue that used to happen if a NIC was
moved to a different PCI slot.
I'm not sure about Slackware, but on Debian you would look in the file
/etc/udev/rules.d/70-persistent-net.rules
My own looks like this:
# 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:0x00df (forcedeth)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="00:11:2f:86:25:5d", ATTR{type}=="1", KERNEL=="eth*",
NAME="eth0"
(the line starting with SUBSYSTEM has wrapped, but should all be on one
line)
As you can see it maps the NIC with MAC address 00:11:2f:86:25:5d to
eth0. If I wanted that NIC to be eth1 I would edit NAME= value and the
new mapping will be picked up when I reboot.
In your case I suspect there will be a line for an eth1 that is the NIC
you would like to have as eth0. I would suggest editing it so that the
NAME= is eth0 and delete any other line that maps to eth0. When you
reboot it should map eth0 correctly.
- Ben
--
This message came to you via the Vancouver Linux Users Group mailing list.
For unsubscription instructions do not email the list, but rather send mail
to vanlug-request*******. That would do it. The MAC address from the NIC in the machine you
copied will still be listed as eth0.
- Ben
--
This message came to you via the Vancouver Linux Users Group mailing list.
For unsubscription instructions do not email the list, but rather send mail
to vanlug-request*******.
a udev issue. When udev sees a nic it maps the MAC address to an ethX.
If it sees a new MAC address it will map it to a different ethX, even if
the original nic is no longer present. This is actually a good thing,
and fixes the wandering NIC/ethX issue that used to happen if a NIC was
moved to a different PCI slot.
I'm not sure about Slackware, but on Debian you would look in the file
/etc/udev/rules.d/70-persistent-net.rules
My own looks like this:
# 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:0x00df (forcedeth)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="00:11:2f:86:25:5d", ATTR{type}=="1", KERNEL=="eth*",
NAME="eth0"
(the line starting with SUBSYSTEM has wrapped, but should all be on one
line)
As you can see it maps the NIC with MAC address 00:11:2f:86:25:5d to
eth0. If I wanted that NIC to be eth1 I would edit NAME= value and the
new mapping will be picked up when I reboot.
In your case I suspect there will be a line for an eth1 that is the NIC
you would like to have as eth0. I would suggest editing it so that the
NAME= is eth0 and delete any other line that maps to eth0. When you
reboot it should map eth0 correctly.
- Ben
--
This message came to you via the Vancouver Linux Users Group mailing list.
For unsubscription instructions do not email the list, but rather send mail
to vanlug-request*******. That would do it. The MAC address from the NIC in the machine you
copied will still be listed as eth0.
- Ben
--
This message came to you via the Vancouver Linux Users Group mailing list.
For unsubscription instructions do not email the list, but rather send mail
to vanlug-request*******.
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