On 30 June 2017 at 18:58, <m.roth at 5-cent.us> wrote: > Got a problem: a user's workstation froze. He wound up rebooting, without > calling me in first, so I dunno. But, and this is a show-stopper, when it > came up, it came up with the firmware MAC, not the spoofed one. In > /etc/sysconfig/network-scripts/ifcg-eth0, I've got the spoofed MAC > address, and a UUID. In the grub.conf, I've got net.ifnames=0 > biosdevname=0. But when I logged onto his machine, ip a showed eth0... but > with the firmware MAC. > > And I'm wondering if it went to renew its IP address, and lost the spoofed > MAC. That might explain his freezes. > > Anyway, does anyone have any idea if there's some networkmangler or > systemd configuration that would force it to pay attention? > > Note that my hack to fix it was ifdown eth0/ifup eth0, and it's fine. > Not much to go on here .... Your ifcfg-* configs would be helpful. There was a slight change to MAC spoof behaviour in the NM 1.4.0 that was part of EL7.3 compared to the older NM as I recall https://www.hogarthuk.com/?q=node/18 That may or may not be affecting you.