Thank Dell Computers for this "improvement", which somehow was accepted by Linux kernel maintainers. With Slackware, where systemd doesn't live, it's easily fixed by creating */etc/udev/rules.d/70-persistent-net.rules* with this content (magic numbers gleaned from /sbin/lspci: # PCI device 0x8086:0x1503 (e1000e) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*ec:a8:6b:f8:33:94*", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="*eth**", NAME="*eth0*" "Consistent Network Device Naming": Convention for naming Ethernet adapters (NICs) in Linux. Interfaces are named: eno<n> for on-board (embedded) NICs, ens<n> for PCI Express hotplug slots enp<x>s<y> for PCI slots where <n> matches chassis labels, <x> is the PCI slot, and <y> is an on-card index. NPAR and SR-IOV devices add a suffix of _<vf> from 0..n Other Linux conventions, such as .<vlan> and :<alias> suffixes remain unchanged. CNDN replaced the older eth<x> naming scheme with the rationale that it caused problems on multihomed machines; the NICs would be named based on discovery order by the kernel at boot time. Removing existing or adding new interfaces could cause the previously added interfaces to change names. On 12/18/23 09:02, Gary wrote: