Re: How can I prevent udevd from renaming eth0 to em1

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On 10/17/2012 03:59 PM, Digimer wrote:
On 10/17/2012 05:44 PM, JD wrote:
On 10/17/2012 02:38 PM, Digimer wrote:
On 10/17/2012 04:01 PM, JD wrote:
On 10/16/2012 05:05 PM, JD wrote:
On 10/16/2012 02:27 AM, Reindl Harald wrote:
Am 16.10.2012 04:58, schrieb JD:
I googled this and came across 2 purported
solutions, neither of which worked.
1. Uninstall package biosdevname and reboot.

That did not prevent udevd from renaming eth0 to em1.

2. Add the line
biosdevname=0
to /boot/grub2/grub.cfg

That did not work either.
Any other way to get around this renaming?
find out your MAC-address with "ifconfig -a"
make a udev-rule like below (ONE line) for the MAC
reboot the machine after that and you are done

[root@rh:~]$ cat /etc/udev/rules.d/70-persistent-net.rules
# PCI device 0x8086:0x1502 (e1000e)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="78:ac:c0:b1:76:e4", ATTR{dev_id}=="0x0",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"



I made the change and rebooted.

$ dmesg | grep em1
[    5.949297] udevd[219]: renamed network interface eth0 to em1
$ ifconfig eth0
eth0: error fetching interface information: Device not found

$ cat /etc/udev/rules.d/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 0x168c:0x0023 (ath9k)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="edited-out", ATTR{dev_id}=="0x0", ATTR{type}=="1",
KERNEL=="wlan*", NAME="wlan0"

# PCI device 0x1039:0x0900 (sis900)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="edited-out", ATTR{dev_id}=="0x0",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# USB device 0x0bda:0x8187 (usb) (custom name provided by external
tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR{address}=="edited-out", ATTR{dev_id}=="0x0", ATTR{type}=="1",
KERNEL=="wlan*", NAME="wlan1"

So, does anyone have any other suggestion how to
prevent udevd from renaming eth0 to em1?
Here is what I wrote down for changing ethernet devices to any arbitrary
name you want, including ethX, under Fedora 17 (15+, actually).

https://alteeve.ca/w/Changing_Ethernet_Device_Names_in_EL7_and_Fedora_15%2B


You don't need to mess with biosdevname, juts set/edit
70-persistent-net.rules (details described in the above link).

The author says on that web page:

You can download and run this and it will print a skeleton udev file. If
the output looks good, re-run it again and pipe the output to the
70-persistent-net.rules file.

Well, I ran his script. It outputs nothing, and exits with status 0.
That's me. It does an 'ifconfig -a' and, parses the interfaces and spits
out entries formatted for udev.d. So if it printed nothing, check to see
if 'ifconfig -a' shows any interfaces.

digimer
Briefly....
$ ifconfig -a
em1       Link encap:Ethernet  HWaddr xx:xx:...etc

lo        Link encap:Local Loopback

virbr0    Link encap:Ethernet  HWaddr xx:xx:...etc

virbr0-nic Link encap:Ethernet  HWaddr xx:xx:...etc

wlan0     Link encap:Ethernet  HWaddr xx:xx:...etc


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