Hell, believe or not, I had read along man system.link several times, but I would wish to be able to understand all these little subtleties. "All link files are collectively sorted and processed in lexical order, regardless of the directories in which they live. However, files with identical filenames replace each other. Files in /etc have the highest priority, files in /run take precedence over files with the same name in /usr/lib." Go figure...
There are plenty of recipes on the Internet telling the reader to disable the damned "novelty" https://askubuntu.com/questions/767786/changing-network-interfaces-name-ubuntu-16-04 https://serverfault.com/questions/837454/interface-will-not-rename-under-systemd etc https://www.google.com.ua/search?q=ubuntu+systemd+link+rename+interfaces Most often, what is forgotten, is regeneration of initramfs file after .link changes But also, sometimes numeric prefix of the .link file name is forgotten as well So, this is not working, frustrating, infuriating the user and making him want to disable the damned thing altogether. As for me, just now, I managed to guess that .links preventing renaming of VLAN interfaces should have earlier prefixes than ones binding known interface names to their MAC addresses (as VLAN iface has the same MAC) This was a really hard-earned knowledge because there are no usable HOWTOs about these "novelties" https://askubuntu.com/questions/791149/prevent-vlan-and-bridge-interface-rename-to-renamex-form https://www.prolixium.com/blog?id=1023 https://www.google.com.ua/search?q=ubuntu+systemd+vlan+link+rename So, with current system documentation, unless you don't have an existing working sample for copying, you are doomed to guessworks, spitting and cursing until you guess what to write where and how to name it. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1708166 Title: systemd/udev does not rename network interfaces specified in .link files Status in systemd package in Ubuntu: Invalid Bug description: $ ip link show ... 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether d0:50:99:76:a1:bf brd ff:ff:ff:ff:ff:ff $ cat /etc/systemd/network/eth0.link [Match] MACAddress=d0:50:99:76:a1:bf [Link] Name=eth0 I am pretty sure that MAC addresses do match And I don't change net.ifnames to 0 : $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-4.4.0-87-generic.efi.signed root=/dev/mapper/vg_smart-root_smart ro then : $ sudo udevadm test-builtin net_setup_link /sys/class/net/enp2s0 [sudo] password for mwg: calling: test-builtin === trie on-disk === tool version: 229 file size: 6841778 bytes header size 80 bytes strings 1755242 bytes nodes 5086456 bytes Load module index timestamp of '/etc/systemd/network' changed Parsed configuration file /etc/systemd/network/eth0.link Parsed configuration file /lib/systemd/network/99-default.link Created link configuration context. ID_NET_DRIVER=r8169 Config file /lib/systemd/network/99-default.link applies to device enp2s0 ID_NET_LINK_FILE=/lib/systemd/network/99-default.link Unload module index Unloaded link configuration context. (and, surely, the interface is renamed from eth0 to enp2s0 on boot, but not renamed back afterwards) can you please tell where I could be wrong ? on my existing systems I still keep MAC->ifname relations in /etc/udev/rules.d/70-persistent-net.rules inherited from past Ubuntu versions. But this is a new setup of Ubuntu 16.04 and I would like to configure it in the new & recommended way. thanks in advance for your replies To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1708166/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
