Abstract: Provided is an operating method of a database server in a Virtual eXtensible Local Area Network (VXLAN) system including a network administrator, the database server, a switch and at least one end system. The database server may maintain a table including information about a network profile and information about a service profile, receive, from the switch, a request for information on a virtual station interface (VSI) type corresponding to a request message for setting up and canceling a VXLAN service that the switch receives from the at least one end system, retrieve a network property corresponding to the VSI type from the table in response to the request, and provide the retrieved network property to the switch.

Abstract: Provided herein a network virtualization apparatus and method, the apparatus including a tunnel manager configured to collect tunnel end points information within a network, and to connect each tunnel end point with a tunnel based on the tunnel end point information collected; a tunnel packet end point configured to receive a tunnel packet and process the packet such that an L2 switching may be performed, and to transmit the packet to a domain VSI (virtual switching instance); the domain VSI configured to perform the L2 switching on the processed packet, and to transmit the packet to a tunnel packet generator; and the tunnel packet generator configured to add a tunnel header to the packet for which the L2 switching has been performed to generate a new tunnel packet, and to transmit the new tunnel packet.

Abstract: A power-efficient link group-based communication system is provided. In link group-based communication, according to the amount of transmitted traffic, an appropriate number of links in a link group are set to active mode to be used for traffic transmission, and the rest of the links in the link group are set to power save mode, thereby not transmitting traffic. Thus, efficient power reduction in the link group-based communication can be realized.

Abstract: Disclosed are an encryption and authentication-based network management method and apparatus. A network management method according to an embodiment of the present invention includes: generating a public key and a private key for encryption and decryption of network attribute information to be used by a virtual machine positioned in the network server to provide the generated public key to a database; receiving network attribute information encrypted by the database with the public key from the database; and decrypting the received network attribute information with the private key to authenticate the network attribute information.

Abstract: A power-efficient link group-based communication system is provided. In link group-based communication, according to the amount of transmitted traffic, an appropriate number of links in a link group are set to active mode to be used for traffic transmission, and the rest of the links in the link group are set to power save mode, thereby not transmitting traffic. Thus, efficient power reduction in the link group-based communication can be realized.

Abstract: Disclosed is a configuration method and device for a two-dimensional expandable crossbar matrix switch for application to tera-level high-speed and large-capacity switches. The present invention includes N input ports, N output ports, and an N×N matrix switch for transmitting cells between the input and output ports. Each input port includes N VOQs which are sequentially combined by n VOQs to configure respective L VOQ groups. The L VOQ groups are connected to L XSUs through independent interface ports. Therefore, each input port can transmit a maximum of L cells to the matrix switch during one cell time slot.

Abstract: A high speed and high capacity switching apparatus is disclosed. The apparatus includes: N input ports each of which for outputting maximum l cells in a time slot, wherein each of the N input ports includes N virtual output queues (VOQs) which are grouped in l virtual output queues group with n VOQs; N×N switch fabric having l2 crossbar switch units for scheduling cells inputted from N input ports based on a first arbitration function based on a round-robin, wherein l VOQ groups are connected to l XSUs; and N output ports connected to l XSUs for selecting one cell from l XSUs in a cell time slot by scheduling cells by a second arbitration function based on a backlog weighed round-robin, which operates independently of the first arbitration function, and transferring the selected cell to its output link.

Abstract: A high speed and high capacity switching apparatus is disclosed. The apparatus includes: N input ports each of which for outputting maximum l cells in a time slot, wherein each of the N input ports includes N virtual output queues (VOQs) which are grouped in l virtual output queues group with n VOQs; N×N switch fabric having l2 crossbar switch units for scheduling cells inputted from N input ports based on a first arbitration function based on a round-robin, wherein l VOQ groups are connected to l XSUs; and N output ports connected to l XSUs for selecting one cell from l XSUs in a cell time slot by scheduling cells by a second arbitration function based on a backlog weighed round-robin, which operates independently of the first arbitration function, and transferring the selected cell to its output link.

Abstract: Disclosed is a configuration method and device for a two-dimensional expandable crossbar matrix switch for application to tera-level high-speed and large-capacity switches. The present invention includes N input ports, N output ports, and an N×N matrix switch for transmitting cells between the input and output ports. Each input port includes N VOQs which are sequentially combined by n VOQs to configure respective L VOQ groups. The L VOQ groups are connected to L XSUs through independent interface ports. Therefore, each input port can transmit a maximum of L cells to the matrix switch during one cell time slot.

Abstract: An ATM switch having the buffer threshold controller to control the cell input into the switching element using the back-pressure signal and a method for determining the buffer threshold according to the buffer threshold controller are disclosed. The ATM switch includes buffer pool storing the cell input to the switch; buffer pool control part storing the buffer pool occupancy information per input port of the buffer pool; threshold control part receiving the buffer pool occupancy information from the buffer pool control part and calculating the threshold per input port periodically and then sending it to the buffer pool control part; input crosspoint control part controlling the cells input to the buffer pool by receiving the control signal from the buffer pool control part; and output crosspoint control part controlling the cells output from the buffer pool by receiving the control signal from the buffer pool control part.

Abstract: A controller for the logical buffer depth in ATM switching system and a method for determining the logical queue depth, using the back-pressure signal and the occupied buffer depth information and supporting the P classes, are disclosed. The controller includes Routing Table Element making tag for routing of input cell; Input Buffer storing the cell that a tag is attached to in said routing table element; Switch fabric that reads the cell from said input buffer and then switches it to the output port; and Input buffer controller controlling the logical queue size in said input buffer.

Abstract: An idle address controller for a shared buffer type ATM switch controls the addresses of output cells in a common memory to be stored directly in an idle address buffer without passing through the conventional idle address delay controller, by improving the idle address control scheme of a unit switch. The idle address controller includes an idle address control signal generator for generating idle address control signals based on the buffer length information from counters, idle address control signal buffers for storing the idle address control signals, and an idle address control signal multiplexer. Therefore, the idle addresses can be efficiently provided, and this mechanism lowers cell loss and reduces required memory capacity.