Abstract: A network topology system for combining in-band hardware links for network redundancy with out-of-band hardware links for facile initialization in a network with centralized control architecture, wherein the combined use of in-band and out-of-band hardware links further reduces the overall hardware links required for centralized control. An initialization processor allows direct out-of-band hardware links between a plurality of centralized controllers to be used for initialization, while further allowing in-band hardware links for connections between two switches, and between a switch and a controller, wherein the use of in-band hardware links allows the same hardware links to convey both data and control communications, increasing redundancy, and reducing the number of hardware links required by the network domain as a whole.

Abstract: A method of reconfiguring a provisioning system. The method comprises sending a reload command to a controller component that identifies one of a plurality of circuit switches which the provisioning system is configured to provision; sending by the controller component the reload command to a plurality of commander components associated with the circuit switch identified in the reload command; the commander components associated with the circuit switch identified in the reload command sending a stop command to each of an at least one connection thread launched by the commander component; terminating by the commander components the at least one connection thread; reading a modified configuration file by each of the commander components associated with the circuit switch identified in the reload command; and launching at least one connection thread by each commander component associated with the circuit switch identified in the reload command based on the modified configuration file.

Abstract: A method of publishing a message includes receiving a subscription request at a first remote relay from a first client and transmitting a subscription message from the remote relay to each of a first set of central relays. The method also includes receiving a publication request at a second remote relay from a second client and transmitting a publication message from the second remote relay to a first central relay of the first set of central relays and a second central relay of a second set of central relays. The method further includes determining, at the first central relay, that a target matches at least a portion of a pattern, transmitting the message string from the first central relay to the first remote relay, determining, at the first remote relay, that the target matches at least a portion of the pattern, and transmitting the message string to the first client.

Abstract: Embodiments of the present disclosure disclose a method for controlling data stream switch and a relevant equipment. The method includes: obtaining bandwidth demand information of a data stream; calculating a BWM according to the bandwidth demand information, the physical bandwidth of at least one ingress port and at least one egress port of the data stream, and TDM service bandwidth information; performing sequencing on entries of the BWM, to obtain a bandwidth sequencing information table; performing cell even sequencing processing on the data stream according to the bandwidth sequencing information table, to obtain a cell table; and controlling, sending of cells of the data stream according to the cell table. Through the solutions provided, processing complexity may be effectively reduced, the problem of scale limitation on a bufferless switch structure is solved, and meanwhile, a delay jitter during switch processing is also decreased.

Abstract: A network switch transfers data, which are to be transferred between nodes, in a time-division multiplex manner after allocating the data to slots, which are created by dividing a unit of time into a plurality of sections. An input unit includes a selection unit that selects a buffer unit according to an input slot in order to transfer the data input from the input port to the buffer unit, an input slot correspondence management table that stores a correspondence relationship between the input slots and the buffer units, and input port management information used to control a communication bandwidth of the input port.

Abstract: A method of a first DNS which can update server information in real time without necessarily using a TTL (Time To Live) by recording a network address of the first DNS, which has previously obtained server address information from a second DNS, in a notification list, by the second DNS, and transmitting the changed information from the second DNS to the first DNS recorded in the notification list when the previously obtained/requested server address changes, and updating the server address by the first DNS as provided by the second DNS. A DNS updating server address method may further include providing a first DNS with server address information corresponding to a domain, recording a network address of the first DNS in a notification list, corresponding to the domain and/or the server address information, and transmitting a changed server address information to the first DNS based on the notification list.

Abstract: An Autonomous System domain comprising a topology transparent zone comprising a plurality of topology transparent zone nodes at least some of which are topology transparent zone edge nodes, wherein the topology transparent zone nodes are interconnected with one another via a plurality of internal links, and a plurality of neighboring external nodes connected to the topology transparent zone edge nodes via a plurality of external links, wherein no link state advertisements (LSAs) describing the internal links are distributed to the neighboring external nodes.

Abstract: Various techniques can be used to handle frames within multi-stage switching fabric. For example, in one method, a frame and an associated frame header are received at a switching fabric stage. The associated frame header includes a first field and a second field. The method selects one or more fabric points of exit within the switching fabric stage, based on the second field. The first field is used to select one or more other fabric points of exit within another switching fabric stage, and thus two different fields within the associated frame header specify fabric points of exit. The method then sends the frame to the selected fabric points of exit within the switching fabric stage.

Abstract: Techniques are described for optimizing broadcast and collect primitives in switch fabrics. A switch is described for use in a switch fabric that includes a plurality of switches configured to interconnect a plurality of host devices. The switch includes a plurality of ports configured to receive and transmit data, and switch logic configured to facilitate transfer of the data among the ports. The switch logic is configured to implement a collect function in which responses from multiple destination host devices are collected and aggregated for transmission to a source host device. A first portion of the switch logic is configured to identify, count, and discard the responses in a data plane of the switch. A second portion of the switch logic is configured to generate an aggregated response in a control plane of the switch and introduce the aggregated response into the data plane for transmission toward the source host device.

Abstract: In general, techniques are described for facilitating multi-tenancy of a server accessed by virtual networks of a data center. A device included within a data center comprising one or more processors may perform the techniques. The processors may be configured to execute a virtual switch that supports a number of virtual networks executing within the data center. The virtual switch may be configured to receive a request regarding data associated with an identifier that is unique within one of the virtual networks that originated the request. The virtual switch may then translate the identifier included within the request to generate a globally unique identifier that is unique within the plurality of virtual networks, update the request to replace the identifier included within the request with the globally unique identifier, and transmit the updated request to a server of the data center.

Abstract: A distributed switch may include a hierarchy with one or more levels of surrogate sub-switches (and surrogate bridge elements) that enable the distributed switch to scale bandwidth based on the size of the membership of a multicast group. When a sub-switch receives a multicast data frame, it forwards the packet to one of the surrogate sub-switches. Each surrogate sub-switch may then forward the packet to another surrogate in a different hierarchical level or to a destination computing device. Because the surrogates may transmit the data frame in parallel using two or more connection interfaces, the bandwidth used to forward the multicast packet increases for each surrogate used.

Abstract: A method of transferring data in a network is provided. Data is received at a sub-switch of a first bundled switch having a plurality of sub-switches, the sub-switch being configured to only couple to connections external to the first bundled switch. The method also includes transferring the data from the first bundled switch using a multi-lane cable coupled to a second bundled switch, a first end of the multi-lane cable coupled to a sub-switch in the first bundled switch and a second end of the multi-lane cable coupled to at least two sub-switches in the second bundled switch.

Abstract: A negotiation process is conducted between a controller and a target forwarding or switching device with respect to an abstract candidate device model for a forwarding plane. The abstract candidate device model is provided by a controller and indicates intended forwarding or switching behavior for the target device that a controller desires to have implemented on the target device. The intended behavior is specified in terms of mandatory and non-mandatory behavior. A hardware abstraction layer (HAL) for the target device analyzes the abstract candidate device model and decides whether the mandatory and optional behavior that is specified by the model is supported given the architecture of the target. The HAL informs the controller whether the intended behavior is supported by the target. Additional behavior may be proposed and accepted or not before the model is finalized. The finalized model may then be implemented and used to control forwarding behavior on the target device.

Abstract: A distributed switch may include a hierarchy with one or more levels of surrogate sub-switches (and surrogate bridge elements) that enable the distributed switch to scale bandwidth based on the size of the membership of a multicast group. When a sub-switch receives a multicast data frame, it forwards the packet to one of the surrogate sub-switches. Each surrogate sub-switch may then forward the packet to another surrogate in a different hierarchical level or to a destination computing device. Because the surrogates may transmit the data frame in parallel using two or more connection interfaces, the bandwidth used to forward the multicast packet increases for each surrogate used.

Abstract: Methods, media gateways, and computer program products are described associated with call redundancy for a packet-based network. The described call redundancy involves a receiver module in communication with the packet-based network adapted to receive or transmit data associated with a plurality of calls from one or more signaling links. The data includes signaling information based on a publicly-switched telephone network (“PSTN”) standard. A first processor module is in communication with the receiver module and is adapted to process the data associated with the plurality of calls. A second processor module is in communication with the receiver module and the first processor module. The second processor module is adapted to receive at least a portion of the data associated with the plurality of calls. At least a portion of data maintained on the second processor module is synchronized with the corresponding data processed by the first processor module.

Abstract: A switch IHS stacking system includes a plurality of switch IHSs. A least one first switch IHS includes a first processing system and at least one second switch IHS includes a second processing system that is different from the first processing system. A stacking engine is located on each of the plurality of switch IHSs. Following the coupling of the plurality of switch IHSs into a stack and in response to the startup of the plurality of switch IHSs, the each of the stacking engines may exchange capability information with each of the plurality of switch IHSs and determine a control plane processing system affinity and a data plane processing system affinity for each of the plurality of switch IHSs. The stacking engines may then determine a master switch IHS for the stack that has the highest control plane processing system affinity and data plane processing system affinity.

Abstract: In one embodiment, a connection is maintained between a pair of ethernet ports that have circuitry connected in series with the ports and receiving power-over-ethernet (PoE) from one of the ports, by providing a controllable bypass circuit coupled to the pair of ethernet ports in parallel with the circuitry receiving power-over-ethernet, sensing a preselected condition, and opening and closing the bypass circuit in response to the presence or absence of the preselected condition. Power sourcing equipment (PSE) may supply the one of the ports with power over ethernet, and the circuitry may transports data between the pair of ethernet ports. The circuitry may also supply the switch with a control signal in response to the detection of the preselected condition.

Abstract: A computer program product and system for managing allocation of storage in a switch utilizing flow control are provided. The switch includes a plurality of ports and an internal storage divided into a plurality of storage units. The computer program product and system provide for monitoring an average number of storage units used by each of the plurality of ports over a predetermined time period, setting a threshold for the average number of storage units used by each of the plurality of ports, and allocating one or more available storage units assigned to a first port to a second port in response to storage allocation management being enabled for the second port and the average number of storage units used by the second port exceeding the threshold for the second port.

Abstract: In one embodiment, a method for providing link aggregation (LAG) to heterogeneous switches includes receiving, at a switch controller, LAG requests forwarded by switches and determining that multiple LAG requests corresponding to a server have been received, grouping the multiple LAG requests into LAG groups according to a switch from which they were received and correlating all the LAG groups with the server, instructing each of the switches to setup a LAG group with the server according to the LAG groups determined by the switch controller, and creating alternate flows that correspond to flows through each of the switches to the server through direction from the switch controller. The switches may rely upon OpenFlow to communicate with the switch controller, in some approaches. In addition, other methods for providing LAG to heterogeneous switches are also described, along with systems and computer program products which provide LAG to heterogeneous switches.

Abstract: A method for node communication for use in a rack system is provided. The method includes providing a detecting unit for connecting to the nodes via a circuit switching device; predefining a linked list in which a limit of times for the detecting unit to communicate with each of the nodes is set; sequentially selecting one node of the nodes so that the detecting unit is connected to the one node via the circuit switching device; adding an assigned communication parameter between the detecting unit and the one node selected to the linked list, wherein a number of times of communication corresponding to the assigned communication parameter is not greater than the limit of times; and performing communication between the detecting unit and the one node selected in accordance with the assigned communication parameter in the linked list.

Abstract: Various signal routing systems are disclosed. Some routing systems include a crosspoint switch or switching fabric for coupling input ports to output ports, allowing an input signal received at one of the input ports to be transported to one or more of the output ports. The systems may include aggregation or compression modules to allow multiple input signals to be combined into one or more compressed signals, which may be converted into optical signals for transmission to a communication network. In some embodiments, the communication network may include a packet switched router which extracts some of the input signals from the optical signals and produced corresponding packetized signals that are coupled to output ports. Some routing system may include only a packet switched router. Some routing systems may be configured to receive compressed or aggregated signals and to decompress or deaggregate such signals to form individual signals as output signals.

Abstract: A clustered network may include a plurality of switch boxes where a master switch box may communicate and control hardware devices in remote switch boxes. The switch boxes in the network may each include a multiplexer, for example, a field programmable array (FPGA) that may process message requests related to hardware devices of a switch box. If the hardware device is in a remote switch box, then the FPGA of the master switch box may process the status data from the remote switch box so that a local processor in the master switch box can read the status data.

Abstract: A PCIe fabric includes at least one PCIe switch. The fabric may be used to connect multiple hosts. The PCIe switch implements security and segregation measures for host-to-host message communication. A management entity defines a Virtual PCIe Fabric ID (VPFID). The VPFID is used to enforce security and segregation. The fabric ID may be extended to be used in switch fabrics with other point-to-point protocols.

Abstract: Some embodiments of the invention relate to WRAs that implement removable memory units (RMUs). The ability to load operational, maintenance, and mission data through RMUs is critical for avionics platform safety and logistics. However, due to strong hardware dependence, universality, or rather platform-invariance is not currently available for aircraft data acquisition (including the real-time recording of new performance, operational (flight) and environmental data) or mission data loading via prior art WRAs.

Abstract: An example method for service insertion in a network environment is provided in one example and includes configuring a service node by tagging one or more interface ports of a virtual switch function to which the service node is connected with one or more policy identifiers. When data traffic associated with a policy identifier is received on a virtual overlay path the virtual switch function may then terminate the virtual overlay path and direct raw data traffic to the interface port of the service node that is tagged to the policy identifier associated with the data traffic.

Abstract: A method for managing power consumption by a network device is disclosed. The network device includes first and second ports, each of the first and second ports identified by a unique identifier and adapted to handle separate network traffic. The method includes verifying that the first and the second ports are connected to a common network end node; shutting off a link between the first port and the network end node; obtaining the unique identifier of the first port; creating, on the second port, a virtual port in response to the unique identifier of the first port; discovering the virtual port on the network device; and redirecting traffic formerly routed through the link through the virtual port.

Abstract: A novel and efficient method is described that creates a monolithic high capacity Packet Engine (PE) by connecting N lower capacity Packet Engines (PEs) via a novel Chip-to-Chip (C2C) interface. The C2C interface is used to perform functions, such as memory bit slicing and to communicate shared information, and enqueue/dequeue operations between individual PEs.

Abstract: An apparatus for synchronizing a plurality of digital subscriber line access multiplexers (DSLAMs) comprising a reference clock configured to generate a reference clock signal, and an interface configured to transmit the reference clock signal to the DSLAMs, wherein each of the DSLAMs is configured to align its system clock with the reference clock.

Abstract: A receiving network node (210) configured to select from received packets differing by time of initial transmission from a sending network node (230), and accepting for transmission, based on initial transmission time, the selected packets to an application layer (740). An internetworked processor node configured to: (a) read a sequence number and an originator identifier of a received packet message (810); (b) compare a stored highest sequence number associated with the originator identifier with the received packet sequence number (820); (c) if the received packet sequence number is less than or equal to the stored highest sequence number associated with the originator identifier, then discard (840) the received packet; and (d) if the received packet sequence number is greater than the stored highest sequence number associated with the originator identifier, then deliver (860) the message of the received packet to an application based on an upper layer protocol.

Abstract: A test application includes instructions for configuring a digital cross connect. A first modem and a second modem are each connected to at least one telecommunications network and a digital cross connect. An integrated telephony call management service (ITCMS) client includes computer-executable instructions stored on a computer-readable medium included in the test computer.

Abstract: A verification device that is used in a system in which a first device and a second device communicate using a physical communication path that includes at least one switch among switches included in a plurality of switch clusters and does not include a plurality of switches that belong to a different switch cluster among the plurality of switch clusters, the verification device including a verification unit that verifies whether switches included in a first communication path and a second communication path that are communication paths used for communication between the first device and the second device are included in the same switch cluster, and an output unit that outputs a result of the verifying.

Abstract: A prohibition turn determination apparatus determines an initial path so that the communication amounts of respective links connecting switches to each other are most efficiently distributed between a communication pair, that is, a pair of servers communicating with each other via a network. Then, the prohibition turn determination apparatus calculates the communication amounts of respective turns formed along the initial path based on the communication amounts set between end nodes which are the communication pair. Next, the prohibition turn determination apparatus determines prohibition turns, which are not used for packet communication, based on the communication amounts of respective turns by an Up/down method or a TP method. Finally, the prohibition turn determination apparatus determines the final routing to avoid the prohibition turns.

Abstract: A switch device is configured to receive a data unit from a virtual port from a first set of virtual ports. The switch device is configured to associate an identifier of each virtual port from the first set of virtual ports with an identifier of a first access group that is associated with an access set. The switch device is configured to prohibit the data unit from being sent to a remaining virtual port from the first set of virtual ports if the data unit is addressed to that virtual port. The switch device is configured to otherwise allow the data unit to be sent to a virtual port from a second set of virtual ports associated with a second access group when the second access group is associated with the access set. The second set of virtual ports is mutually exclusive from the first set of virtual ports.

Abstract: A network unit for use in a switching fabric includes multiple units collectively constituting a single network entity, each having ports for the reception and forwarding of data packets. The network unit has at least one fabric port for connection to a partner port on another one of the units by at least one link. The network unit is organized to send and receive via the at least one fabric port protocol packets which contain information on the path costs between said units in the fabric and to perform an algorithm to determine, on the basis of said information, routes for data packets within the fabric to other units of the fabric.

Abstract: An integrated circuit device for switching data has a plurality of input channels and a plurality of output channels. The device includes a switch for selectively connecting a subset of the output channels, mutually orthogonal, to the input channels by providing signal paths between the selected mutually orthogonal output channels and the input channels. The selected output channels are not orthogonal to the output channels that are not selected.

Abstract: A method and system provide in-band protection switch signaling in a communication system arranged as a point-to-multipoint tree. The point-to-multipoint tree includes a root node communicatively coupled to a plurality of leaf nodes through both a working link and a protection link. Data is transferred through a current link of the point-to-multipoint tree. The current link is either the working link or the protection link. A fault is detected in the current link in the point-to-multipoint tree. Each leaf node in the point-to-multipoint tree is notified of the fault using the current link. Upon receiving the notification, the root node and each leaf node switch to the other link of the working link and the protection link.

Abstract: Distribution of network processing load among a set of packet processing devices is improved by employing means for eliminating, controlling, or otherwise affecting redundant packet processing operations. In one embodiment, at least two packet processing devices are present, both capable of processing data packets flowing therethrough, such as, inspecting, detecting, and filtering data packets pursuant to one or more filters from a filter set. Redundancy is controlled by providing or enabling either or both of the packet processing devices with capability for detecting during its said inspection of said data packets that, for example, one or more filters had been previously executed on said data packets by the other packet processing device, and then not executing the previously-executed filters on said data packets.

Abstract: To improve efficiency of systems operating on internet protocol (IP) over Infiniband (IB) networks, mechanisms are provided for operating a system including a plurality of nodes, each connected to at least one IB switch. A determination is made whether an IP address of a node is included in a first level of a global ARP cache. An IP over IB GUID corresponding to the IP address of the node is identified. A determination is made whether an entry in a second level of the global ARP cache includes the identified IP over IB GUID of the node, and corresponding the IP over IB GUID of the node to IB address information of the node.

Abstract: To improve efficiency of systems operating on internet protocol (IP) over Infiniband (IB) networks, mechanisms are provided for operating a system including a plurality of nodes, each connected to at least one IB switch. A determination is made whether an IP address of a node is included in a first level of a global ARP cache. An IP over IB GUID corresponding to the IP address of the node is identified. A determination is made whether an entry in a second level of the global ARP cache includes the identified IP over IB GUID of the node, and corresponding the IP over IB GUID of the node to IB address information of the node.

Abstract: In order to input/output only necessary information in accordance with the form of application, a mobile phone includes: a wireless circuit 22 to connect to a first network in order to communicate with a device connected to the first network; a wireless LAN circuit 23 to connect to a second network different from the first network in order to communicate with a device connected to the second network; and a setting mode switching portion 21 to switch between a first setting mode capable of activating wireless circuit 22 and wireless LAN circuit 23 and a second setting mode capable of activating only wireless circuit 22 among wireless circuit 22 and wireless LAN circuit 23.

Abstract: A cross-connect system includes a mapping unit that maps second signal frames on which cross-connection is performed with a space switch, into third signal frames on which cross-connection is performed with the space switch and a time switch; a selection unit that selects either first signal frames on which cross-connection is performed with the space switch and the time switch and corresponding clock signals, or the third signal frames and corresponding clock signals; a cross-connection unit that receives either the first signal frames and corresponding clock signals or the third signal frames and corresponding clock signals selected by the selection unit and performs cross-connection for either the first signal frames or the third signal frames; and a demapping unit that demaps the third signal frames output from the cross-connection unit into the second signal frames and output the second signal frames.

Abstract: A switching network includes an upper tier having a master switch and a lower tier including a plurality of lower tier entities. The master switch, which has a plurality of ports each coupled to a respective lower tier entity, implements on each of the ports a plurality of virtual ports each corresponding to a respective one of a plurality of remote physical interfaces (RPIs) at the lower tier entity coupled to that port. Data traffic communicated between the master switch and RPIs is queued within virtual ports that correspond to the RPIs with which the data traffic is communicated. The master switch applies data handling to the data traffic in accordance with a control policy based at least upon the virtual port in which the data traffic is queued, such that the master switch applies different policies to data traffic queued to two virtual ports on the same port of the master switch.

Abstract: Techniques for facilitating the operation of one or more virtual networks are described. In some examples, a system may include a first controller node device configured to control operation of a first set of elements in the one or more virtual networks, wherein the first set of elements includes a first server device. The system may also include a second controller node device configured to control operation of a second set of elements in the one or more virtual networks, wherein the second set of elements includes the second server device. The first controller node device and the second controller node device are peers according to a peering protocol by which the first controller node device and the second controller node device exchange information relating to the operation of the first set of elements and the second set of elements.

Abstract: A communications system (100) includes a packet switching network (130) configured to transfer a stream of information packets from a source (110) to a destination (120). The communications system (100) also includes at least one loss concealment processor (140) configured to perform packet loss concealment on the stream of information packets as the stream passes through an intermediate point within the packet switching network (130).

Abstract: A method is provided for a port management system in which a switch is automatically provisioned with network resources. A command or set of commands are stored and automatically executed on the switch upon the occurrence of a defined network event. The command or set of commands may be associated with one or more ports on the switch. When executed, the commands cause a change to a port configuration and/or policy on the switch to control access to a network resource. The network resource may include any device or service accessible on the network. The defined network event may include any network event associated with a device or user connected to the network. The command or set of commands may reference variables, control structures, and functions to modify command execution.

Abstract: A data bridge controls the transfer of packets between different priority network fabrics of a closed network, e.g. high and low priority network fabrics a vehicular network. Processing circuitry determines first priority routing of a first packet from the first network fabric to the second network fabric based on packet content type of the first packet and priority conditions of the second network fabric. A determination is also made regarding whether a second packet is to be delivered from the second network fabric to the first network fabric. If the second packet is to be delivered, second priority routing of the second packet is made based on packet content type of the second packet and priority conditions of the first network fabric.

Abstract: Methods and systems for path resolving in a symmetric InfiniBand network are provided. One method includes transmitting, from a first node, a Management Datagram (MAD) to a second node, the MAD including a query for a Global Unique Identifier (GUID) for a port in the second node. The method further includes receiving the GUID for the port in response to the MAD and determining a Global Identifier (GID) for the port based on the received GUID. One system includes first and second nodes in communication with each other. The first node is configured to transmit a MAD to the second node, the MAD including a query for a GUID for a port in the second node. The first node is further configured to receive the GUID for the port in response to the MAD and determine a GID for the port based on the received GUID.

Abstract: The present invention provides, according to one example, a method of route aggregation in a network. The network may include at least two switches connected by a link. The method includes the steps of arranging virtual connection identifiers (VCIs) into groups based on a common prefix. Each of the groups corresponds to an outgoing port of a next switch. The method further includes the steps of allocating a VCI at the incoming port of the next switch, and informing the outgoing port of the previous switch of the allocated VCI number. The step of arranging may include splitting all available VCIs into N subgroups, where N is the number of outgoing ports on the switch on the other end of the link.

Abstract: FSs (16a to 16h) are each connected to IFSs (14a to 14x). Each of the FSs (16a to 16h) transmits a setting frame (60) that includes an FS number to the connected IFSs (14a to 14x). Each of the IFSs (14a to 14x) registers, in an LAG setting table, the FS numbers included in the received setting frames (60) and ports that have received the same in association with each other. Then, each of the IFSs (14a to 14x) sorts ports (52a to 52h) in an order of the associated FS numbers, and sets each of LAGs (18a to 18x) in a common order.

Abstract: A method of specifying a switching matrix over a Bene{hacek over (s)} network involves specifying a first number of ingress ports and a second number of egress ports for the matrix. Switching elements and connections between the switching elements are configured to the number of ports, and the matrix is subdivided into a plurality of sections. The switching elements and ports are moved and/or turned to obtain certain configurations, but connections are retained.