Hi Everyone,

How to disable /lib/udev/write_net_rules. This scripts always append unwanted rule I've edited the file /etc/udev/rule.d/70-persistent-net.rules

Here is what it want

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:02:04.0", KERNEL=="eth*", NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:02:05.0", KERNEL=="eth*", NAME="eth1"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:03:05.0", KERNEL=="eth*", NAME="eth2"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:03:05.1", KERNEL=="eth*", NAME="eth3"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:0e:00.0", KERNEL=="eth*", NAME="eth4"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:11:00.0", KERNEL=="eth*", NAME="eth5"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:0b:05.0", KERNEL=="eth*", NAME="eth6"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ID=="0000:0b:05.1", KERNEL=="eth*", NAME="eth7"

But when the NIC module is loaded again , the unwanted line append to the file like below.

# PCI device 0x14e4:0x16a8 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:14:5e:a8:4c:6f", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x14e4:0x16aa (bnx2)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1a:64:bd:13:86", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4"

# PCI device 0x14e4:0x16ac (bnx2)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:14:5e:6e:b7:c8", ATTR{type}=="1", KERNEL=="eth*", NAME="eth6"

# PCI device 0x14e4:0x16ac (bnx2)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:14:5e:6e:b7:ca", ATTR{type}=="1", KERNEL=="eth*", NAME="eth7"

# PCI device 0x14e4:0x16a8 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:14:5e:a8:4c:6e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x14e4:0x16aa (bnx2)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1a:64:be:13:02", ATTR{type}=="1", KERNEL=="eth*", NAME="eth5"

# PCI device 0x14e4:0x16a8 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:14:5e:a8:4c:72", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

# PCI device 0x14e4:0x16a8 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:14:5e:a8:4c:73", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

So, How can I disable /lib/udev/write_net_rules that ruin my config.

Thank you

Try if this works:

In your /etc/udev/rules.d/70-persistent-net.rules modify the entry KERNEL=="eth*", NAME="eth0" into--

That is: remove the KERNEL=="eth*" glob entry; and modify the NAME=key assignment from '=' into ':=' as it is shown above, then reload the udev rules

Hope that helps.

Good luck.

this is brilliant and helps with the udev rules for which many cannot understand the justification. in a raspberry pi the MAC is in the hardware and moving a working SD card from one box to another is not working: the udev rules see the new MAC address and fail to connect to it. the same with uboot booting systems - the MAC is then usually in the code that boots but the rest of the system is stored on some disk - again, no internet connection.

could you explain why and how it works?

thank you !