How can I prevent udevd from renaming eth0 to em1

[Digimer]

On 10/23/2012 06:20 PM, Bill Davidsen wrote:
> Digimer wrote:
>> On 10/17/2012 09:18 PM, Digimer wrote:
>>> On 10/17/2012 06:24 PM, JD wrote:
>>>> 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
>>>
>>> Ah, I see. On my systems, I get:
>>>
>>> ===
>>> em1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
>>>          ether f0:de:f1:fc:65:b3  txqueuelen 1000  (Ethernet)
>>> ===
>>>
>>> So the script says "grab any non-space character up to the colon (foo:).
>>> Your now showing a colon, so it fails to match.
>>>
>>> Try replacing:
>>>
>>> ===
>>>     if ($line =~ /^(\S+):/)
>>> ===
>>>
>>> With:
>>>
>>>
>>> ===
>>>     if ($line =~ /^(\S+)/)
>>> ===
>>
>> Strike that, I see that you are also showing the HWADDR on the same
>> line, so the whole regex this is going to miss your output.
>>
>> Skip the script; The main thing is to take the 'em1 ... HWadd:
>> aa:bb:cc:dd:ee:ff' and put it in 70-persistent-net.rules as (one line);
>>
>> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
>> ATTR{address}=="aa:bb:cc:dd:ee:ff", NAME="eth0"
>>
>> Then in you 'ifcfg-eth0' file, set 'DEVICE="eth0"' and make sure there
>> is no HWADDR="..." line. Reboot and you should be golden.
>>
> He's going to have to create an ifcfg file for this device, right? Will
> the ifup do the right thing for an em hardware interface renamed to eth
> (don't have em so can't compare)

Yes, you need a corresponding 'ifcfg-<dev>' file to match the udev.d's
NAME="<dev>" value. Do not use the ifcfg-<dev>'s 'HWADDR="..."' though.

-- 
Digimer
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