Thanks for that explanation Pitti! THat makes sense now that I've read the thread.
I wouldn't suggest making changes here for the sake of convenience, I also admit that I am a special corner case in this matter. Would it be a safe assumption that if I can decipher how to write a udev rule for network devices, I should be able to rename them myself? I think, knowing what you described above, that would be fine since this is intended behaviour. It just caught me off guard as this is the first time running anything but Trusty on this hardware and the only time I generally run an interim release is in VMs or Cloud instances which almost always only have one network device anyway. -- 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/1544747 Title: Strange device names for USB NICs Status in systemd package in Ubuntu: Incomplete Bug description: Fresh install of Xenial on an intel NUC with 1 onboard GigE and one USB GigE NIC. I was setting up networking for MAAS and discovered that the device names were ridiculous: bladernr@critical-maas:/etc/udev$ ifconfig |grep HWaddr eno1 Link encap:Ethernet HWaddr ec:a8:6b:fb:9f:66 enx8cae4cff4099 Link encap:Ethernet HWaddr 8c:ae:4c:ff:40:99 In the previous Trusty install on this NUC with the same USB dongle, they were named eth0 and em1. The predictable standard device names. Looking at udevadm: P: /devices/pci0000:00/0000:00:19.0/net/eno1 E: DEVPATH=/devices/pci0000:00/0000:00:19.0/net/eno1 E: ID_BUS=pci E: ID_MM_CANDIDATE=1 E: ID_MODEL_FROM_DATABASE=82579LM Gigabit Network Connection E: ID_MODEL_ID=0x1502 E: ID_NET_DRIVER=e1000e E: ID_NET_LABEL_ONBOARD=en L1U1 E: ID_NET_LINK_FILE=/lib/systemd/network/99-default.link E: ID_NET_NAME_MAC=enxeca86bfb9f66 E: ID_NET_NAME_ONBOARD=eno1 E: ID_NET_NAME_PATH=enp0s25 E: ID_OUI_FROM_DATABASE=ELITEGROUP COMPUTER SYSTEMS CO., LTD. E: ID_PATH=pci-0000:00:19.0 E: ID_PATH_TAG=pci-0000_00_19_0 E: ID_PCI_CLASS_FROM_DATABASE=Network controller E: ID_PCI_SUBCLASS_FROM_DATABASE=Ethernet controller E: ID_VENDOR_FROM_DATABASE=Intel Corporation E: ID_VENDOR_ID=0x8086 E: IFINDEX=2 E: INTERFACE=eno1 E: SUBSYSTEM=net E: SYSTEMD_ALIAS=/sys/subsystem/net/devices/eno1 E: TAGS=:systemd: E: USEC_INITIALIZED=5400250 P: /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/net/enx8cae4cff4099 E: DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/net/enx8cae4cff4099 E: ID_BUS=usb E: ID_MM_CANDIDATE=1 E: ID_MODEL=AX88178 E: ID_MODEL_ENC=AX88178\x20 E: ID_MODEL_FROM_DATABASE=AX88178 E: ID_MODEL_ID=1780 E: ID_NET_DRIVER=asix E: ID_NET_LINK_FILE=/lib/systemd/network/90-mac-for-usb.link E: ID_NET_NAME=enx8cae4cff4099 E: ID_NET_NAME_MAC=enx8cae4cff4099 E: ID_NET_NAME_PATH=enp0s29u1u5 E: ID_OUI_FROM_DATABASE=Plugable Technologies E: ID_PATH=pci-0000:00:1d.0-usb-0:1.5:1.0 E: ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_5_1_0 E: ID_REVISION=0001 E: ID_SERIAL=ASIX_Elec._Corp._AX88178_000002 E: ID_SERIAL_SHORT=000002 E: ID_TYPE=generic E: ID_USB_CLASS_FROM_DATABASE=Vendor Specific Class E: ID_USB_DRIVER=asix E: ID_USB_INTERFACES=:ffff00: E: ID_USB_INTERFACE_NUM=00 E: ID_USB_SUBCLASS_FROM_DATABASE=Vendor Specific Subclass E: ID_VENDOR=ASIX_Elec._Corp. E: ID_VENDOR_ENC=ASIX\x20Elec.\x20Corp. E: ID_VENDOR_FROM_DATABASE=ASIX Electronics Corp. E: ID_VENDOR_ID=0b95 E: IFINDEX=3 E: INTERFACE=enx8cae4cff4099 E: SUBSYSTEM=net E: SYSTEMD_ALIAS=/sys/subsystem/net/devices/enx8cae4cff4099 /sys/subsystem/net/devices/enx8cae4cff4099 E: TAGS=:systemd: E: USEC_INITIALIZED=8700146 And finally, looking in /etc/udev: bladernr@critical-maas:/etc/udev$ sudo ls -ra /etc/udev/* /etc/udev/udev.conf /etc/udev/rules.d: .. . /etc/udev/hwdb.d: .. . There are NO rules at all in udev for persistent names. Not even some samples and defaults. Looking at a completely different Xenial system with a single GigE NIC: bladernr@galactica:~$ ifconfig enp2s0 Link encap:Ethernet HWaddr 40:8d:5c:51:5b:0d P: /devices/pci0000:00/0000:00:1b.2/0000:02:00.0/net/enp2s0 E: DEVPATH=/devices/pci0000:00/0000:00:1b.2/0000:02:00.0/net/enp2s0 E: ID_BUS=pci E: ID_MM_CANDIDATE=1 E: ID_MODEL_FROM_DATABASE=Killer E220x Gigabit Ethernet Controller E: ID_MODEL_ID=0xe091 E: ID_NET_DRIVER=alx E: ID_NET_LINK_FILE=/lib/systemd/network/99-default.link E: ID_NET_NAME_MAC=enx408d5c515b0d E: ID_NET_NAME_PATH=enp2s0 E: ID_OUI_FROM_DATABASE=GIGA-BYTE TECHNOLOGY CO.,LTD. E: ID_PATH=pci-0000:02:00.0 E: ID_PATH_TAG=pci-0000_02_00_0 E: ID_PCI_CLASS_FROM_DATABASE=Network controller E: ID_PCI_SUBCLASS_FROM_DATABASE=Ethernet controller E: ID_VENDOR_FROM_DATABASE=Qualcomm Atheros E: ID_VENDOR_ID=0x1969 E: IFINDEX=2 E: INTERFACE=enp2s0 E: SUBSYSTEM=net E: SYSTEMD_ALIAS=/sys/subsystem/net/devices/enp2s0 E: TAGS=:systemd: E: USEC_INITIALIZED=752502 and again, nothing in the udev rules: bladernr@galactica:~$ ls -a /etc/udev/* /etc/udev/udev.conf /etc/udev/hwdb.d: . .. /etc/udev/rules.d: . .. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: udev 228-6ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0 Uname: Linux 4.4.0-2-generic x86_64 ApportVersion: 2.19.4-0ubuntu2 Architecture: amd64 Date: Thu Feb 11 16:36:35 2016 InstallationDate: Installed on 2016-02-10 (1 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160210) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-2-generic.efi.signed root=UUID=b53bf9e5-5cab-4ebd-98cc-a07ddffe53af ro quiet splash vt.handoff=7 SourcePackage: systemd UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/03/2014 dmi.bios.vendor: Intel Corp. dmi.bios.version: RKPPT10H.86A.0032.2014.0303.1322 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: D53427RKE dmi.board.vendor: Intel Corporation dmi.board.version: G87971-403 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorp.:bvrRKPPT10H.86A.0032.2014.0303.1322:bd03/03/2014:svn:pn:pvr:rvnIntelCorporation:rnD53427RKE:rvrG87971-403:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1544747/+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
