Abstract: A method of Ethernet virtualization using hardware control flow override. The method comprises providing, at a first logical entity of a first programmable logic device, control signals used for performing control-flow, selectively routing the control signals to a second programmable logic device that is external to the first programmable logic device, receiving processed control signals from the second programmable logic device, and forwarding the processed control signals to a second logic entity of the first programmable logic device.

Abstract: A method of Ethernet virtualization using automatic self-configuration of logic of a data router. The method comprising maintaining control parameters at a master device, accessing, by a slave device, the control parameters at the master devices, and configuring the slave device based on the accessed control parameters.

Abstract: A packet that represents unknown traffic for a virtual host is received. A first test is performed to ascertain whether or not a destination connection can be determined for the received packet wherein, if a destination connection can be determined, a second test is performed to ascertain whether or not one or more connection-specific resources required to send the packet to a virtual host memory corresponding to the destination connection are available. If a destination connection for the packet cannot be determined, the packet is passed to a store engine. If the one or more connection-specific resources are not available, the packet is passed to the store engine. The store engine obtains a free packet buffer from a FIFO memory. The store engine moves the packet into the free packet buffer and submits the free packet buffer to the elastic FIFO memory.

Abstract: A packet that represents unknown traffic for a virtual host is received. A test is performed to ascertain whether or not a destination connection can be determined for the received packet wherein it is discovered the packet is a broadcast (or multicast) packet. Since such packets have multiple destinations in a virtualized environment, the broadcast (or multicast) packet requires special handling and is passed to a store engine. The store engine obtains a free packet buffer from an elastic FIFO memory, moves the packet into the free packet buffer, and submits the free packet buffer back to the elastic FIFO memory. An assist engine determines and assigns connections to packets submitted to the elastic FIFO without known connections, such as broadcast (or multicast) packets. The assist engine efficiently performs this task through the use of indirect buffers, which are also obtained from and submitted back to the elastic FIFO.

Abstract: An incoming LAN traffic management system comprising: an I/O adapter configured to receive incoming packets from an Ethernet; a plurality of hosts coupled to the I/O adapter and each having a host buffer; a data router configured to block information received by the I/O adapter into memory locations from an SBAL associated with at least one of the plurality of hosts and in accordance with blocking parameters for the at least one of the plurality of hosts, the data router including an expiration engine configured to expire the SBAL before it is full if at least one predetermined threshold is exceeded.