Data Transmission

The atmle_output function transmits data using the network device.

If the destination address in the packet is a broadcast address, the M_BCAST flag in the p_mbuf->m_flags field should be set prior to entering this routine. A broadcast address is defined as FF.FF.FF.FF.FF.FF (hex) for both Ethernet and Token Ring and C0.00.FF.FF.FF.FF (hex) for Token Ring.

If the destination address in the packet is a multicast or group address, the M_MCAST flag in the p_mbuf->m_flags field should be set prior to entering this routine. A multicast or group address is defined as any nonindividual address other than a broadcast address.

The device driver keeps statistics based on the M_BCAST and M_MCAST flags.

Token Ring LANE emulates a duplex device. If a Token Ring packet is transmitted with a destination address that matches the LAN MAC address of the local LE Client, the packet is received. This is also True for Token Ring packets transmitted to a broadcast address, enabled functional address, or an enabled group address. Ethernet LANE, on the other hand, emulates a simplex device and does not receive its own broadcast or multicast transmit packets.