1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback XXX brd XXX inet XXX scope host lo valid_lft forever preferred_lft forever inet6 XXX scope host noprefixroute valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether XXX brd XXX altname enp15s0f0 inet XXX brd XXX scope global dynamic noprefixroute eth0 valid_lft 1805936sec preferred_lft 1805936sec inet6 XXX scope global temporary dynamic valid_lft 86395sec preferred_lft 77592sec inet6 XXX scope global dynamic mngtmpaddr noprefixroute valid_lft 86395sec preferred_lft 86395sec inet6 XXX scope link noprefixroute valid_lft forever preferred_lft forever 3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether XXX brd XXX altname enp15s0f1