AdvertisedSpeed
auto(0). If auto-negotiation is enabled (see ethDot3AutoNegotiate), then advertise all speeds that the device supports. If auto auto-negotiation is disabled, then use the highest speed that the device supports. b10(1). Advertise that the interface supports 10 Mbps. b100(2). Advertise that the interface supports 100 Mbps. b1000(3). Advertise that the interface supports 1 Gbps. b10g(4). Advertise that the interface supports 10 Gbps.