version 4 sockets (alias for -f inet). -6, --ipv6 Display only IP version 6 sockets ... mptcp Display MPTCP sockets. --inet-sockopt Display inet socket options. -f FAMILY, --family…etails ] | -r [ esolve ] | -iec | -f [ amily ] { inet | inet6 | link } | -4 | -6 | -B | -0 | -l [ oops ... protocol family identifier can be one of inet , inet6 , bridge , mpls or …file FILE [ all | OBJECTS ] OPTIONS := { f[amily] { inet | inet6 | link | help ... does what the name says. -family [ inet | inet6 | link | help ] Specify protocol family. 'inetsocket families systemd (1) supports, including AF_INET and AF_INET6 . Added in version ... socket families systemd supports, including AF_INET and AF_INET6 . Added in versionIPv4 and IPv6 sockets (AF_INET and AF_INET6) when the socket is created. ThisADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS FAMILY := [ inet | inet6 | mpls | bridge | link ] OPTIONS := FLAGSroute options... ] ] OPTIONS := { -h | --help | [{ -f | --family } { inet | inet6 } | -4 | -6 } DESCRIPTION The routel script