я в 2016 проверял и демонстрировал нагугленный фокус. трафик ходил, ифконфиг интерфейс не отображал
железки некоторые не жуёт тоже: IPoIB devices have a 20 byte hardware addresses. The deprecated utility ifconfig is unable to read all20 bytes and should never be used to try and find the correct hardware address for an IPoIB device. Theip utilities from the iproute package work properly.The first 4 bytes of the IPoIB hardware address are flags and the queue pair number. The next 8 bytesare the subnet prefix. When the IPoIB device is first created, it will have the default subnet prefix of 0xfe:80:00:00:00:00:00:00. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/pdf/networking_guide/Red_Hat_Enterprise_Linux-7-Networking_Guide-en-US.pdf
$ ip a -bash: ip: command not found $ ifconfig |grep UP lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000