[systemd-devel] when/where was support for assigning "ethX" names removed?

[Chris Friesen]

On 05/12/2016 01:27 PM, Chris Friesen wrote:
> On 05/12/2016 12:50 PM, James Hogarth wrote:
>>  >
>>  > On 12 May 2016 18:28, "Chris Friesen" <cbf123 at mail.usask.ca
>> <mailto:cbf123 at mail.usask.ca>> wrote:
>>  > >
>>  > > Hi,
>>  > >
>>  > > Could someone point me to the commit that removed support for assigning
>> "ethX" names based on MAC addresses?
>>  > >
>>  > > Alternately, can someone suggest a way to get equivalent behaviour (the
>> ability to set "ethX" names based on MAC address) using the current
>> infrastructure? (Preferably as of RHEL 7, so systemd 219 plus a bunch of
>> patches.)
>>  > >
>>  > > The back story is that we've got a lot of scripts/tools that currently
>> assume the "ethX" naming, and while we will eventually sort it out we really
>> don't want to do it right now.  The previous method of assigning "ethX" names
>> was working well for our use-case (though I realize it had issues more
>> generally).
>>  > >
>>
>> For future reference when dealing with EL systems it's best to check the Red Hat
>> documentation in the first instance:
>>
>> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/ch-Consistent_Network_Device_Naming.html
>>
>
> Thanks, that shows some promise.  I had actually read some portions of that
> document, but I should probably have read all of section 8 first.

Looks like I spoke too soon.  I tried adding HWADDR= entries to our 
/etc/sysconfig/network-scripts/ifcfg-ethX files, and while it mostly works I 
just got this on rebooting:

[root at compute-0 wrsroot]# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP 
mode DEFAULT qlen 1000
     link/ether 08:00:27:9f:b9:47 brd ff:ff:ff:ff:ff:ff
3: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP 
mode DEFAULT qlen 1000
     link/ether 08:00:27:9d:14:c4 brd ff:ff:ff:ff:ff:ff
4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP 
mode DEFAULT qlen 1000
     link/ether 08:00:27:f1:36:11 brd ff:ff:ff:ff:ff:ff
5: enp0s8: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT 
qlen 1000
     link/ether 08:00:27:dd:42:ae brd ff:ff:ff:ff:ff:ff

Note the position-based naming for device 5.

And here's the relevent file:

[root at compute-0 wrsroot]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
NAME=eth1
HWADDR=08:00:27:dd:42:ae
BOOTPROTO=dhcp
ONBOOT=yes

So...anyone have any ideas why this isn't working?  Is it because I'm trying to 
use the "eth" namespace which could possibly collide with the kernel naming?

Chris