Constant netlink_packet_route::rtnl::constants::RTM_F_LOOKUP_TABLE

pub const RTM_F_LOOKUP_TABLE: u32 = 4096;

Show the table from which the lookup result comes. Note that before commit c36ba6603a11, Linux would always hardcode RouteMessageHeader.table (known as rtmsg.rtm_table in the kernel) to RT_TABLE_MAIN.