De acordo com os documentos , somente esses sinalizadores são documentados
UP, LOOPBACK, BROADCAST, POINTOPOINT, MULTICAST, PROMISC, ALLMULTI, NOARP, DYNAMIC, SLAVE
Other flags do exist and can be seen in within the angle brackets but they are either obsolete (NOTRAILERS), not implemented (DEBUG), or specific to certain devices (MASTER, AUTOMEDIA and PORTSEL). We will not discuss them here...
Tente descobrir a marca / nome da sua interface de rede.
lspci -v
Pesquise na Web detalhes técnicos desse nic.