debian@BeagleBone:~$ networkctl status eth0
● 2: eth0
                     Link File: /lib/systemd/network/99-default.link
                  Network File: /etc/systemd/network/eth0.network
                          Type: ether
                         State: degraded (configuring)
                          Path: platform-4a100000.ethernet
                        Driver: cpsw
                    HW Address: d0:39:72:29:f9:76 (Texas Instruments)
                           MTU: 1500 (min: 68, max: 1500)
                         QDisc: mq
  IPv6 Address Generation Mode: eui64
          Queue Length (Tx/Rx): 8/8
              Auto negotiation: yes
                         Speed: 100Mbps
                        Duplex: full
                          Port: tp
                       Address: fe80::d239:72ff:fe29:f976
             DHCP6 Client DUID: DUID-EN/Vendor:0000ab1172c4fa2d130d25c00000

Mar 20 19:55:31 BeagleBone systemd-networkd[529]: eth0: Link UP
Mar 20 19:55:35 BeagleBone systemd-networkd[529]: eth0: Gained carrier
Mar 20 19:55:36 BeagleBone systemd-networkd[529]: eth0: Gained IPv6LL