1

EDIT: This is precise situation after I took the code to rename the interfaces.

This is my netplan configuration file:

network:
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: no
      dhcp6: no
      addresses: [192.168.1.93/24]
      gateway4: 192.168.1.91
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

Here is the output of ip addr ls

 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 2: rename2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:1e:67:d6:33:24 brd ff:ff:ff:ff:ff:ff
 3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
   link/ether 00:1e:67:d6:33:25 brd ff:ff:ff:ff:ff:ff

When I run sudo netplan --debug generate I get this output:

 ** (generate:1571): DEBUG: 00:08:01.444: Processing input file //etc/netplan/10-systemd-networkd-eth.yaml..
 ** (generate:1571): DEBUG: 00:08:01.444: starting new processing pass
 ** (generate:1571): DEBUG: 00:08:01.444: eno1: setting default backend to 1
 ** (generate:1571): DEBUG: 00:08:01.444: Generating output files..
 ** (generate:1571): DEBUG: 00:08:01.444: NetworkManager: definition eno1 is not for us (backend 1)

Here is the output of systemctl status systemd-networkd :

systemd-networkd.service - Network Service
   Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2018-08-29 23:31:20 IST; 1h 1min ago
     Docs: man:systemd-networkd.service(8)
 Main PID: 570 (systemd-network)
   Status: "Processing requests..."
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/systemd-networkd.service
           └─570 /lib/systemd/systemd-networkd

Aug 29 23:31:19 august2018 systemd[1]: Starting Network Service...
Aug 29 23:31:20 august2018 systemd-networkd[570]: Enumeration completed
Aug 29 23:31:20 august2018 systemd[1]: Started Network Service.
Aug 29 23:35:01 august2018 systemd-networkd[570]: eno1: Gained carrier
Aug 29 23:35:03 august2018 systemd-networkd[570]: eno1: Gained IPv6LL 
2

You've used the literal string ethMac where the actual interface name is expected. Change this to the interface name, which you can learn by running the command ip link.

  • That is the interface name. I changed it and ip addr ls displays this name. – Sunny Aug 29 '18 at 17:40
  • 2
    @Sam Your interface name is actually ethMac? Literally? This I gotta see. What sort of system is this? How did it get that bizarre name? Is that something you did? – Michael Hampton Aug 29 '18 at 17:43
  • 2
    Well, that explains that. Obviously I can't recommend that; you really should use the predictable interface names the system comes up with on its own. – Michael Hampton Aug 29 '18 at 18:01
  • 1
    And you're sure that netplan did not generate a configuration for systemd-networkd? Did you go look at it? – Michael Hampton Aug 29 '18 at 19:24
  • 1
    @Sam Honestly I would just ignore netplan and write your own systemd-networkd config directly. Like I said, it's a pointless piece of crap, the stated purpose of which makes no sense. It will most likely fade away. – Michael Hampton Aug 29 '18 at 20:00

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