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: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq state UP group default qlen 1000 link/ether XXX brd XXX altname enx9c6b001822fc inet XXX brd XXX scope global dynamic noprefixroute enp0s31f6 valid_lft 12903sec preferred_lft 12903sec inet6 XXX scope global dynamic noprefixroute valid_lft 2591675sec preferred_lft 604475sec inet6 XXX scope global dynamic noprefixroute valid_lft 332666sec preferred_lft 332666sec inet6 XXX scope link noprefixroute valid_lft forever preferred_lft forever