> Just to clarify: net.ifnames=0 disables the systemd/udev interface renaming feature. Well, I tried that and it didn't change the behavior, using 1 as a value did. Don't know if there's been tampering between freedesktop and Ubuntu 14.04LTS but that was my experience. > Also, if you add rules to /etc/udev/rules.d, you should rebuild your initrd. Thanks for the information. I didn't and it has been working for a while (through reboots), what bad thing(s) may happen if I don't? ----- Original Message ----- From: "Gordon Messmer" <gordon.messmer at gmail.com> To: "CentOS mailing list" <centos at centos.org> Sent: Monday, February 1, 2016 11:26:38 AM Subject: Re: [CentOS] NICs order On 02/01/2016 07:00 AM, Leroy Tennison wrote: > The issue here may be systemd ... > Web documentation at freedesktop.org says net.ifnames needs to be set to zero, I found just the opposite but if it doesn't work for you try both before giving up. Just to clarify: net.ifnames=0 disables the systemd/udev interface renaming feature. biosdevname=0 disables the biosdevname interface renaming feature, which is completely separate. If you want the traditional, non-deterministic Linux interface naming, you must specify both. Also, if you add rules to /etc/udev/rules.d, you should rebuild your initrd. _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos Confidentiality Notice | This email and any included attachments may be privileged, confidential and/or otherwise protected from disclosure. Access to this email by anyone other than the intended recipient is unauthorized. If you believe you have received this email in error, please contact the sender immediately and delete all copies. If you are not the intended recipient, you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.