Comment 2 for bug 1270018

With all due respect, it is Bug # 1470997 which is a duplicate of this, even if [dhcp-all-interfaces] does not add 'everything' (that is, if it is limited to listening to one interface, and that 'enp0s20u1' interface does not exist, my logs):

Dec 14 16:22:50 localhost.localdomain dhclient[12096]: DHCPDISCOVER on enp0s20u1 to 255.255.255.255 port 67 interval 8 (xid=0x1177cf18)
Dec 14 16:22:50 localhost.localdomain dhclient[12096]: send_packet: No such device or address
Dec 14 16:22:50 localhost.localdomain dhclient[12096]: dhclient.c:2396: Failed to send 300 byte long packet over enp0s20u1 interface.
Dec 14 16:22:58 localhost.localdomain dhclient[12096]: DHCPDISCOVER on enp0s20u1 to 255.255.255.255 port 67 interval 8 (xid=0x1177cf18)
Dec 14 16:22:58 localhost.localdomain dhclient[12096]: send_packet: No such device or address
Dec 14 16:22:58 localhost.localdomain dhclient[12096]: dhclient.c:2396: Failed to send 300 byte long packet over enp0s20u1 interface.
Dec 14 16:23:06 localhost.localdomain dhclient[12096]: DHCPDISCOVER on enp0s20u1 to 255.255.255.255 port 67 interval 8 (xid=0x1177cf18)
Dec 14 16:23:06 localhost.localdomain dhclient[12096]: send_packet: No such device or address
Dec 14 16:23:06 localhost.localdomain dhclient[12096]: dhclient.c:2396: Failed to send 300 byte long packet over enp0s20u1 interface.
Dec 14 16:23:14 localhost.localdomain dhclient[12096]: DHCPDISCOVER on enp0s20u1 to 255.255.255.255 port 67 interval 14 (xid=0x1177cf18)
Dec 14 16:23:14 localhost.localdomain dhclient[12096]: send_packet: No such device or address
Dec 14 16:23:14 localhost.localdomain dhclient[12096]: dhclient.c:2396: Failed to send 300 byte long packet over enp0s20u1 interface.
Dec 14 16:23:28 localhost.localdomain dhclient[12096]: DHCPDISCOVER on enp0s20u1 to 255.255.255.255 port 67 interval 12 (xid=0x1177cf18)
Dec 14 16:23:28 localhost.localdomain dhclient[12096]: send_packet: No such device or address
Dec 14 16:23:28 localhost.localdomain dhclient[12096]: dhclient.c:2396: Failed to send 300 byte long packet over enp0s20u1 interface.
Dec 14 16:23:40 localhost.localdomain dhclient[12096]: DHCPDISCOVER on enp0s20u1 to 255.255.255.255 port 67 interval 11 (xid=0x1177cf18)
Dec 14 16:23:40 localhost.localdomain dhclient[12096]: send_packet: No such device or address
Dec 14 16:23:40 localhost.localdomain dhclient[12096]: dhclient.c:2396: Failed to send 300 byte long packet over enp0s20u1 interface.
Dec 14 16:23:51 localhost.localdomain dhclient[12096]: No DHCPOFFERS received.
Dec 14 16:23:51 localhost.localdomain dhclient[12096]: No working leases in persistent database - sleeping.