Brian,

Looks like the answer is "yes" it will work ok with the new names. Thank you.

Mathew,

I followed a number of on-line helps. The problem I ran into was that if the core is updated, as soon as you re-boot it goes back to the newer naming convention and no interfaces are working anymore.

Thanks to both,

Nigel.

On 10/7/2015 6:11 PM, Brian Burch wrote:
On 08/10/15 00:44, Mathew Crane wrote:
Hi Nigel,

The new udev device naming schema is a bit daunting at first. I
recommend at least looking over Red Hat's own documentation in regards
to this:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/ch-Consistent_Network_Device_Naming.html

If you want to revert to the old-style naming:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Disabling_Consistent_Network_Device_Naming.html

Most modern distros are headed down the systemd-udevd path. I recommend
using the CentOS 7 defaults and renaming via
/etc/udev/rules.d/70-persistent-net.rules instead of disabling the
feature altogether.

Here's an example for yours. Replace ATTR{address}== with the MAC
addresses of your interfaces. Easiest way to get these to take effect is
to reboot.

/etc/udev/rules.d/70-persistent-net.rules:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{dev_id}=="0x0",
ATTR{address}=="00:0e:b7:34:10:38", ATTR{type}=="1", KERNEL=="enp*",
NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{dev_id}=="0x0",
ATTR{address}=="00:0e:b7:34:10:39", ATTR{type}=="1", KERNEL=="enp*",
NAME="eth1"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{dev_id}=="0x0",
ATTR{address}=="00:0e:b7:34:10:3a", ATTR{type}=="1", KERNEL=="enp*",
NAME="eth2"

You can get creative with the naming. For mine, I use 'wan0', 'lan0',
'wifi0', etc.

Hope this helps!
mateo

On Wed, Oct 7, 2015 at 7:03 PM, Nigel Aves <ni...@twin-peaks-video.com
<mailto:ni...@twin-peaks-video.com>> wrote:

     Quick question on interface names.

     I'm building a Centos 7 server and the interface names  are no
     longer eth* but (on this machine) are:-

     enp2s0  - Outside world
     enp8s0 -  Internal network
     enp7s0 -  Internal network

     I've tried checking the documentation but can not find a definitive
     answer.

     Will Shorewall - Interfaces be OK with these new names, or should I
     try and revert back to the eth* naming schema.
One of my ubuntu servers has its interfaces automatically names as p33p1
and p34p1.

I simply changed the old eth0/eth1 names to the new ones in these
shorewall files and it has been working fine for a couple of years:

* interfaces (obviously!)
* hosts (because I have multiple subnets on both interfaces)
* masq
* tcinterfaces

Why not just "grep -lir eth /etc/shorewall/ and edit the files?

HTH

Brian

     (and it's a bit of a hit and miss getting those names back, but dead
     easy to loose all your networking! :) )

     Nigel.

     
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