An evaluation device includes a first evaluator configured, for each record used for transmission control of data circulating in a network, to evaluate extent of variation of an amount of the data, based on a history of the amounts of the data matching a condition of the record; a second evaluator configured, for each of the records, to evaluate a size of a space represented by the record, based on the condition of the record; and a calculator configured, for each of the records, to calculate an index value representing a possibility that a predetermined or a greater amount of the data matches the condition of the record within a fixed period of time, based on an evaluation result by the first evaluator, and an evaluation result by the second evaluator. Therefore, it is possible to evaluate a possibility of a sudden occurrence of a flow whose traffic volume is large.

Examples include techniques for virtual Ethernet switching of a multi-node fabric. In some examples, first Ethernet links coupled with a group of Ethernet gateways are link aggregated. The group of Ethernet gateways couple with respective individual physical switch ports of a fabric switch of a multi-node fabric to form a default logical gateway to provide an uplink between a virtual Ethernet switch and an Ethernet network external to the multi-node fabric. Also, one or more individual Ethernet gateways coupled with respective individual physical switch ports of the fabric switch may be arranged to provide one or more respective downlinks between the virtual Ethernet switch and one or more Ethernet nodes external to the multi-node fabric via respective second Ethernet links coupled with the one or more individual Ethernet gateways.

A wireless packet switch and methods for controlling the same include a multiple port controllers, each in communication with a respective wireless transceiver, configured to analyze data streams to and from the respective wireless transceiver; a cross-connect switch in communication with all of the port controllers, configured to provide connections between respective port controllers; an arbiter, in communication with all of the port controllers and with the cross-connect switch, configured to control the cross-connect switch, such that the cross-connect switch connects data streams of the port controllers in accordance with packet destination information and scheduling information from the port controllers.

The present invention discloses a method for controlling transmission security of an industrial communication flow based on an SDN architecture. The method comprises: designing a flow security control module in a management controller, performing in-depth parsing on industrial communication flow data, matching the parsing result with each preset industrial rule policy, and executing a control processing operation of the industrial rule policy, to implement transmission control of an industrial communication flow. The management controller comprises an industrial rule policy database used for storing all industrial rule policies set by a user. An SDN switch maintains a structure of a flow table, and an industrial communication flow is forwarded according to the flow table. The flow table comprises a security control identifier used for indicating whether security transmission of this communication flow needs to be controlled. The present invention can detect the legality of an industrial communication data flow, to control access of industrial communication that does not conform to an industrial rule policy, so that the security and reliability of industrial control systems based on an SDN architecture are guaranteed.

A packet received by a network device via a network. A first portion of the packet is stored in a packet memory, the first portion including at least a payload of the packet. The packet is processed based on information from a header of the packet. After the packet is processed, a second portion of the packet is stored in the packet memory, the second portion including at least a portion of the header of the packet. When the packet is to be transmitted the first portion of the packet and the second portion of the packet are retrieved from the packet memory, and the first portion and the second portion are combined to generate a transmit packet. The transmit packet is forwarded to a port of the network device for transmission of the transmit packet via port of the network device

A method for establishing a communications path is provided. A routing path between a source port on a source switch and a destination port on a destination switch through intermediate switches is identified. A first message is sent to the source switch, the destination switch and the intermediate switches instructing the recipient switches to prepare for establishing a connection. In response to receiving a first set of acknowledgment messages from the recipient switches, a second message is sent to the destination switch and the intermediate switches instructing these switches to establish a connection to the destination port along the identified routing path. In response to receiving a second set of acknowledgment messages from the destination switch and each of the intermediate switches, a third message is sent to the source switch instructing it to establish a connection between the source port and the established connection to the destination port.

Some embodiments provide a method or tool for automatically configuring a logical router on one or more edge nodes of an edge cluster (e.g., in a hosting system such as a datacenter). The method of some embodiments configures the logical router on the edge nodes based on a configuration policy that dictates the selection method of the edge nodes. In some embodiments, an edge cluster includes several edge nodes (e.g., gateway machines), through which one or more logical networks connect to external networks (e.g., external logical and/or physical networks). In some embodiments, the configured logical router connects a logical network to an external network through the edge nodes.

Apparatuses, methods and storage medium associated with buffering data in a switch are provided. In embodiments, the switch may include a plurality of queue buffers, a plurality of queues respectively associated with the plurality of queue buffers, a shared buffer, and a queue point controller coupled with the plurality of queue buffers and the shared buffer. In embodiments the queue point controller may be configured to determine an amount of available space in a selected queue buffer of the plurality of queue buffers. The queue point controller may be further configured to allocate at least a portion of the shared buffer to a selected queue that is associated with the selected queue buffer. In embodiments, this allocation may be based on the amount of available space determined in the selected queue buffer. Other embodiments may be described and/or claimed.

Methods and systems are disclosed for providing a signaling protocol to enable a bi-directional point-to-point Ethernet Virtual Circuits (EVC) to be configured between any two network elements, as part of a network infrastructure. The bi-directional EVC is established by configuration of a source network element and a destination network element, and defines a bi-directional data path across the network infrastructure therebetween. The EVC may include one or more network elements over which the data path may traverse. The methods and systems disclosed may be applied to linear, ring and mesh network topologies.

The invention relates to a method for transmitting messages in a computer network, and to a computer network of this type. The computer network comprises computing nodes (101-105), said computing nodes (101-105) being interconnected via at least one star coupler (201) and/or at least one multi-hop network (1000), wherein each computing node (101-105) is connected via at least one communication line (110) to the at least one star coupler (201) and/or the at least one multi-hop network (1000), and wherein the computing nodes (101-105) exchange Ethernet messages with one another and with the at least one star coupler (201) and/or the at least one multi-hop network (1000). A set of two or more components are directly connected to one another in each case by two or more communication lines (110, 111), wherein each component in the set is either a computing node (101-105) or a star coupler (201), and sending components in the set of components send to at least two of the two or more communication lines (110, 111) at least a proportion of the Ethernet messages that are to be sent, and receiving components in the set of components then accept and/or forward at least a proportion of the Ethernet messages received via the two or more communication lines (110, 111) only if at least two identical messages are received via at least two different communication lines.