On Mon, Feb 1, 2016 at 9:31 AM, Ricardo J. Barberis
<ricardo@xxxxxxxxxxxxx> wrote:
> El Lunes 01/02/2016, Daniel Ruiz Molina escribió:
>> Hi,
>>
>> After installing CentOS 7 in a server with 2 NICs, system detects eth0
>> and eth1 in reserve order. I would like to have eth1 as eth0 and eth0 as
>> eth1. I have forced HWADDR attribute in
>> /etc/sysconfig/network-scripts/ifcfg-etc{0,1}, but after rebooting,
>> order is the same...
>>
>> How can I solve it?
>>
>> Thanks.
>
> You could put the MAC addresses in /etc/udev/rules.d/60-net.rules, e.g.:
>
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="11:22:33:aa:bb:cc", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="44:55:66:dd:ee:ff", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
>
>
> But that never worked reliably for me, no matter what I tried.
>
That is interesting to know. I have not run Centos 7 in a
machine with multiple ports yet, but on 6 blowing up
/etc/udev/rules.d/60-net.rules would make it select the interfaces by
the same order as the MAC.
UPDATE: I just checked my Centos 6 box and it uses
/etc/udev/rules.d/70-persistent-net.rules but in my Centos 7 vm, I
only see a different file altogether
[raub@duckwitch ~]$ ls -l /etc/udev/rules.d/
total 0
-rw-r--r-- 1 root root 0 Jul 25 2014 80-net-name-slot.rules
[raub@duckwitch ~]$
> In the end I had to use different names instead of eth0 and eth1, like:
>
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="11:22:33:aa:bb:cc", ATTR{type}=="1", KERNEL=="eth*", NAME="nic0"
> SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="44:55:66:dd:ee:ff", ATTR{type}=="1", KERNEL=="eth*", NAME="nic1"
>
>
> And also rename /etc/sysconfig/network-scripts/ifcfg-ethX to ifcfg-nicX and
> modify them accordingly.
>
> HTH,
> --
> Ricardo J. Barberis
> Usuario Linux Nº 250625: http://counter.li.org/
> Usuario LFS Nº 5121: http://www.linuxfromscratch.org/
> Senior SysAdmin / IT Architect - www.DonWeb.com
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