This specification is directed to systems and methods including a communications device for relaying data packets to at least one receiving node, having a host processor for receiving data packets and a target interface for transmitting the packets over a communications medium, wherein the target interface is configured to extract address and traffic class information from a packet and return the packet to the host processor when it is determined a node is unavailable and wherein the host processor is configured buffer the packet in a queue corresponding to the address information and the traffic class information.