root@board-under-test:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel qlen 1000
    link/ether 50:33:8b:15:80:72 brd ff:ff:ff:ff:ff:ff
    inet 192.168.12.3/16 brd 192.168.255.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::5233:8bff:fe15:8072/64 scope link
       valid_lft forever preferred_lft forever
3: eth0.12@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1496 qdisc noqueue
    link/ether 12:ac:bf:40:1a:9a brd ff:ff:ff:ff:ff:ff
    inet 169.254.12.3/16 brd 169.254.255.255 scope global eth0.12
       valid_lft forever preferred_lft forever
    inet6 fe80::10ac:bfff:fe40:1a9a/64 scope link
       valid_lft forever preferred_lft forever
root@board-under-test:~# switch-config -d
cpsw hw version 1.12 (0)
0   : type: ucast, addr = 50:33:8b:15:80:72, ucast_type = persistant, port_num = 0x0
1   : type: mcast, addr = ff:ff:ff:ff:ff:ff, mcast_state = f, no super, port_mask = 0x7
2   : type: vlan , vid = 0, untag_force = 0x7, reg_mcast = 0x7, unreg_mcast = 0x7, member_list = 0x7
3   : type: vlan , vid = 12, untag_force = 0x0, reg_mcast = 0x7, unreg_mcast = 0x0, member_list = 0x7

root@board-under-test:~# iperf -c 192.168.12.2
------------------------------------------------------------
Client connecting to 192.168.12.2, TCP port 5001
TCP window size: 43.8 KByte (default)
------------------------------------------------------------
[  3] local 192.168.12.3 port 43718 connected with 192.168.12.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-13.8 sec   512 KBytes   304 Kbits/sec