Re-convergence of protocol independent multicast assert states

Techniques for improving convergence of Protocol Independent Multicast assert state information in multicast groups include forwarding, by a router, a PIM join message originating from a destination host and stores distribution tree information based on the join message. The method further includes participating, by the router, in a Protocol Independent Multicast (“PIM”) assert election among a plurality of routers and storing, by the router, PIM assert state information based on an outcome of the PIM assert election. The method further includes acquiring, by the router, routing information base (“RIB”) convergence. The method further includes triggering by the router, or causing, by the router, another router to trigger, a PIM assert among the plurality of routers. The method further includes re-converging, by the router, with PIM assert states among the plurality of routers and storing, by the router, converged PIM assert state information.

Method for integrating interface device into network

The invention relates to a method for integrating interface devices (110, 210, 310, 410) into a network (100), the network having at least one software-based central control unit (120, 220, 320, 420), which logically separates a data level (150) from a control level (140) by means of a plurality of interface devices, the method comprises: receiving, at an interface of an interface device (210, 310, 410), a first identification message (370, 380, 470, 480) of the central controller (220, 320, 420); checking whether an earlier identification message (360, 460) has been received at another interface of the interface device within a specified time period prior to receiving the first identification message (370, 380, 470, 480); and forwarding the first identification message (480a, 480b) to all network subscribers connected to the interface device if an earlier identification message has not been received at another interface within the specified time period.

DATA TRANSMISSION SYSTEM, COMMUNICATIONS ADAPTER AND METHOD

A method for transmitting data between a sender and at least one receiver in an arranged communications group is described, the method comprising the steps of: arranging the communication group; the sender sending a connection request to the at least one receiver, the connection request including information on the data to be transferred; the sender receiving confirmation of the connection request and a plurality of channels to send the data to; generating a plurality of data packets based on the data to be transmitted and the plurality of channels; sending in parallel the data to the plurality of channels; and receiving confirmation on whether or not the data was received. An apparatus for transmitting data between a sender and at least one receiver is also described.

Stateless multicast based on local label spaces

Various example embodiments for supporting stateless multicast communications in a communication system are presented. Various example embodiments for supporting stateless multicast communications may be configured to support stateless multicast communications in a label switching network (e.g., a Multiprotocol Label Switching (MPLS) network, an MPLS—Traffic Engineered (TE) network, or the like) based on use of local label spaces of nodes of the label switching network for encoding of an explicit path tree for the multicast communications within the multicast communications. Various example embodiments for supporting stateless multicast communications in a label switching network based on use of local label spaces of nodes of the label switching network may be configured to support use of local label spaces of nodes of the label switching network by using network-wide unique node identifiers to uniquely identify nodes with which the node and adjacency labels of the explicit path tree are ...

MULTICAST-ONLY THIN DODAG IN LOW POWER AND LOSSY NETWORK

In one embodiment, a method comprises: generating, by a constrained low power and lossy network (LLN) device that is localized within a subregion of an LLN, a thin destination oriented directed acyclic graph (DODAG) having up to a prescribed limit of attached LLN devices at each hop of the thin DODAG based on generating a DODAG information object (DIO) message specifying an instruction for limiting attachment at each hop of the thin DODAG to the prescribed limit; and causing, by the constrained LLN device, multicast-only transmissions via the thin DODAG based on inserting into the DIO message a multicast-only transmission mode via the thin DODAG and outputting the DIO message, the DIO message causing each neighboring LLN device to selectively attach to the constrained LLN device as an attached child LLN device based on the instruction and execute the multicast-only transmissions via the thin DODAG.

Methodology for efficient upstream multicast in PON networks

Systems and methods for efficient upstream multicast in passive optical networks. An upstream multicast source communicates an upstream multicast packet to the network. Subsequent downstream packet management achieved through use of source filters prevents a reflected copy of the original upstream multicast packets from being received by the upstream multicast source.

COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND COMPUTER-READABLE MEDIUM

Systems and methods for encrypting data in transit

Disclosed herein are embodiments of systems, methods, and products comprising a computing device, which provides Efficient Data-In-Transit Protection Techniques for Handheld Devices (EDITH) to protect data-in-transit. An end user device (EUD) may generate a multicast data packet. The EDITH module of the EUD encapsulates the data packet in a GRE packet and directs the GRE packet to a unicast destination address of an EDITH Multicast Router included in an infrastructure. The EDITH module on the EUD double compresses and double encrypts the GRE packet. The EDITH module on the infrastructure decrypts and decompresses the double compressed and double encrypted GRE packet to recreate the GRE packet. The EDITH module on the infrastructure decapsulates the GRE packet to derive the original multicast data packet, and distributes the original multicast data packet to the multiple group member based on the multicast destination address included in the original multicast data packet.

Multicast message forwarding method and device, switch, chip and storage medium

The invention provides a multicast message forwarding method and device, a switch, a chip and a storage medium. The method comprises the following steps: obtaining a forwarding layer and a multicast ID of a multicast message according to the multicast message; for the multicast message forwarded by the L2 layer, determining each output port of the multicast message according to the multicast ID in the multicast member table of the L2 layer, and forwarding the multicast message through each output port; and for the multicast message forwarded by the L3 layer, each output port of the multicast message is determined by using the multicast leaf table according to the multicast ID, the multicast message is forwarded through the output port, and the multicast member table and the multicast leaf table of the L2 layer are stored separately. According to the technical scheme of the invention, for the L2 layer multicast and the L3 layer multicast, different tables which are separately stored are ...

High-throughput satellite network multicast routing system and method based on software definition

The invention discloses a high-throughput satellite network multicast routing system and method based on software definition, and relates to the technical field of high-throughput satellite network routing in the satellite communication field. The system comprises a user station terminal, a gateway station protocol device, a gateway station channel device, a gateway station SDN switch, an SDN controller, a user station terminal multicast routing control plane module, a user station terminal multicast routing forwarding plane module, a gateway station protocol device multicast routing control plane module and a gateway station protocol device multicast routing forwarding plane module. The system comprises an SDN controller multicast forwarding module, a gateway station channel equipment multicast forwarding module, a CMU multicast channel control module, an SDN controller multicast routing control module and a gateway station SDN switch data exchange module. The method has the characteristics ...

Method and apparatus for receiving reference signals in support of flexible radio communication

A method and apparatus include determining for use with a user equipment a measurement configuration, which includes at least information on a frequency location of synchronization signals, a carrier frequency value, and a measurement bandwidth. The measurement configuration is transmitted to the user equipment by higher layer signaling, where the higher layer signaling is above the physical layer. One or more synchronization signals are transmitted on the frequency location, from which a first identity value can be determined. A broadcast channel is transmitted to the user equipment from which a second identity value can be determined, the broadcast channel including a first reference signal based on the first identity value. A second reference signal based on the first identity value, the second identity value, the frequency location of synchronization signals, the carrier frequency value, and the measurement bandwidth is transmitted.

Cascade switching network construction, network maintenance and route maintenance method

The invention belongs to the technical field of airborne networks, and particularly relates to a cascade switching network construction method, a network maintenance method and a route maintenance method. The method comprises the following steps: 1, a cascade automatic construction process: switches participating in cascade construction automatically enter the construction process after initialization, so that the construction of a cascade network is simply, efficiently and reliably realized; 2, a cascade network automatic maintenance mechanism: for a switch, cascade network maintenance refers to maintenance of cascade network link information, and after cascade construction is successful, the correctness of the link information is maintained through link online and offline interruption processing and periodic transmission of link exchange frames; and 3, the cascade route automatic maintenance mechanism means that after the cascade construction is successful, the switch automatically configures ...

CHANNEL ACCESS INDICATION METHOD AND DEVICE

This application provides a channel access indication method and device. The method includes: receiving, by a first communications device, a channel synchronization request sent by a second communications device, where the channel synchronization request is used to request the first communications device to send a synchronization frame to the second communications device, and a wake-up receiver is configured for the second communications device; and according to the channel synchronization request and a time at which the second communications device is woken up and that is learned by the first communications device based on preset signaling, sending, by the first communications device when a channel is idle, the synchronization frame to the woken-up second communications device, where the synchronization frame is used to instruct the woken-up second communications device to access the channel after receiving the synchronization frame.

Re-convergence of protocol independent multicast assert states

This disclosure describes techniques for improving convergence of Protocol Independent Multicast assert state information in multicast groups. A method includes forwarding, by a router, a PIM join message originating from a destination host and stores distribution tree information based on the join message. The method further includes participating, by the router, in a Protocol Independent Multicast (“PIM”) assert election among a plurality of routers and storing, by the router, PIM assert state information based on an outcome of the PIM assert election. The method further includes acquiring, by the router, routing information base (“RIB”) convergence. The method further includes triggering by the router, or causing, by the router, another router to trigger, a PIM assert among the plurality of routers. The method further includes re-converging, by the router, with PIM assert states among the plurality of routers and storing, by the router, converged PIM assert state information.

WIRELESS DONGLE FACILITATED MOBILE TRANSACTIONS

Computing systems and methods for facilitating mobile transactions are disclosed. An example method includes: detecting, via a hardware communication interface, a user check-in request based at least on a communication exchange between a user device and a signaling device at a location. The communication exchange corresponds to a proximity of the user device to the signaling device. The method further includes: determining a user identifier associated with the user device based at least on the user check-in request; and transmitting one or more promotional items to the user device based at least on the user identifier.

Traffic control in hybrid networks containing both software defined networking domains and non-SDN IP domains

A Software Defined Networking (SDN) controller controls multicast traffic in an SDN domain and one or more non-SDN domains imbedded in the SDN domain.

Dual stage channel interleaving for data transmission

Methods, systems, and devices are described for wireless communication that may perform two-stage channel interleaving in which code blocks are interleaved at a code block level and a symbol level. The interleaved code block data may provide time diversity for the code block data, while the interleaved symbol data may provide frequency diversity for the code block data, thereby facilitating mitigation of narrowband and/or burst interference. In some examples, interleaving within code blocks and interleaving within symbols may allow for pipelined implementation of decoding of code blocks at the recipient for faster processing. In some cases, system data and parity data may be interleaved within code block data to provide a uniform distribution of system data over time within code blocks.

Method and apparatus for implementing a flexible virtual local area network

A method and apparatus for implementing a virtual local area network. The method includes determining a global virtual local area network for transmitting a broadcast data frame in response to receiving the broadcast data frame at a first switch, encapsulating the broadcast data frame based at least in part on said determination and transmitting it to at least one second switch over the determined global virtual local area network. The broadcast data frame is received at the second switch and an identifier of the global virtual local area network is obtained according to the broadcast data frame. Based at least in part on the identifier of the global virtual local area network, it is determined that which local virtual local area network served by the second switch the de-capsulated broadcast data frame can be sent to.

Ethernet-based multi-channels switch, channel arbitration method and communication method thereof

The present invention provides methods and apparatuses for determining a liquid level inside a container by using an effective capacitance associated with one or more sense electrodes that are located inside the container. Embodiments may support different types of liquids, including water, and support different electrical appliances, including electric kettles, coffee makers, and water treatment appliances having a non-transparency housing such as stainless steel and black color Lucite or glass that cannot directly indicate the water level. A value of capacitance characteristic associated with a sensing electrode is determined. The water level may be displayed to the user on any kind of electronic panel, e.g., liquid crystal display (LCD), light emitting diode (LED) display, or vacuum fluorescent display (VFD). Also, a correction factor may be applied to a determined capacitance associated with a sensing electrode to compensate for the operating temperature of the sensor electrode and ...

Network support for reliable multicast operation

The invention relates to network support for reliable multicast operation. Examples described herein relate to switch circuitry comprising: circuitry for sending copies of packets received from a sender network interface device to a plurality of destinations; and circuitry for indicating to the sender network interface device acknowledgements of packet reception from the plurality of destinations based on receiving the acknowledgements of packet reception from the plurality of destinations. In some examples, the circuitry is to indicate acknowledgements of packet reception from a plurality of destinations to a sender network interface device using a packet index value.

Methods and apparatus to manage a physical network to reduce network dependencies in a multi-fabric virtual network

A disclosed example of managing a network includes a packet receiver to receive a packet at a second switch from a first switch via an inter-switch link between the first and second switches; a packet analyzer to determine whether the packet includes a load-based teaming (LBT) egress control value; a packet transmitter to handle the packet according to an LBT policy when the packet analyzer determines the packet does not include the LBT egress control value; and a packet modifier to terminate the packet at the second switch when the packet analyzer determines the packet does include the LBT egress control value.

METHODS AND APPARATUS TO MANAGE A PHYSICAL NETWORK TO REDUCE NETWORK DEPENDENCIES IN A MULTI-FABRIC VIRTUAL NETWORK

An example first server host includes processor circuitry to: connect a virtual network interface card (vNIC) of the first server host to a first physical network interface card (pNIC) and a second pNIC of the first server host; establish an inter-switch link between first and second switches, the first switch and the first server host in a first network fabric, the second switch and a second server host in a second network fabric; and cause transmission of a first and second network packets from the vNIC of the first server host, the first and second network packets to be delivered to the second server host via the inter-switch link, the first network packet to be transmitted via the first pNIC when utilization of the first pNIC does not satisfy a threshold, the second network packet to be transmitted via the second pNIC when the utilization satisfies the threshold.

Link aggregation group failover for multicast

A method of multicasting packets by a forwarding element that includes several packet replicators and several egress pipelines. Each packet replicator receives a data structure associated with a multicast packet that identifies a multicast group. Each packet replicator identifies a first physical egress port of a first egress pipeline for sending the multicast packet to a member of the multicast group. The first physical egress port is a member of LAG. Each packet replicator determines that the first physical egress port is not operational and identifies a second physical port in the LAG for sending the multicast packet to the member of the multicast group. When a packet replicator is connected to the same egress pipeline as the second physical egress, the packet replicator provides the identification of the second physical egress port to the egress pipeline to send the packet to the multicast member. Otherwise the packet replicator drops the packet.

Multi-destination packet redaction

Presented herein are techniques for redacting mirrored network packets prior to providing the mirrored packets to an intended recipient application, such as a third-party analysis application. More specifically, a multi-destination packet redaction device obtains mirrored network traffic that comprises one or more mirrored network packets. The multi-destination packet redaction device filters the mirrored network traffic to determine an intended recipient application of the one or more mirrored network packets and applies a redaction process to redact one or more portions of at least one of the one or more mirrored network packets. The redaction process is customized based on one or more attributes of the intended recipient application.

INTERNET PROTOCOL BROADCASTING

Methods, apparatuses, and systems are provided for improving utilization of a communications system through various atom-based techniques for enhancing the viewing experience for Internet protocol content. Some embodiments exploit atom-based processing to determine which content atoms to broadcast (e.g., multicast) over which channels to which subscribers. Other embodiments make atom-based filtering, caching, and/or other determinations at the user terminal. For example, low-level (e.g., physical layer) filtering may be used to limit the amount of user-layer processing needed, and to facilitate delivery of content to those users most likely to desire that content. Still other embodiments allow users to create customized channels of cached content for viewing as a shared channel. Embodiments include techniques for addressing synchronization of channel content and viewing, and social networking, for subscribers to the shared channel. The shared channels may be further used to facilitate social ...

RE-CONVERGENCE OF PROTOCOL INDEPENDENT MULTICAST ASSERT STATES

This disclosure describes techniques for improving convergence of Protocol Independent Multicast assert state information in multicast groups. A method includes forwarding, by a router, a PIM join message originating from a destination host and stores distribution tree information based on the join message. The method further includes participating, by the router, in a Protocol Independent Multicast (“PIM”) assert election among a plurality of routers and storing, by the router, PIM assert state information based on an outcome of the PIM assert election. The method further includes acquiring, by the router, routing information base (“RIB”) convergence. The method further includes triggering by the router, or causing, by the router, another router to trigger, a PIM assert among the plurality of routers. The method further includes re-converging, by the router, with PIM assert states among the plurality of routers and storing, by the router, converged PIM assert state information.

SYSTEM AND METHOD TO PROVIDE MULTICAST GROUP MEMBERSHIP DEFINED RELATIVE TO PARTITION MEMBERSHIP IN A HIGH PERFORMANCE COMPUTING ENVIRONMENT

Apparatuses, methods, and systems for a user defined formatting instruction to configure multicast Benes network circuitry

Systems, methods, and apparatuses relating to a user defined formatting instruction to configure multicast Benes network circuitry are described. In one embodiment, a processor includes a decoder to decode a single instruction into a decoded single instruction, the single instruction having fields that identify packed input data, packed control data, and a packed data destination; and an execution unit to execute the decoded single instruction to: send the packed control data to respective control inputs of a circuit that comprises an inverse butterfly circuit coupled in series to a butterfly circuit, wherein the inverse butterfly circuit comprises a first plurality of stages of multicast switches and the butterfly circuit comprises a second plurality of stages of multicast switches, read, once from storage separate from the circuit, each element of the packed input data as respective inputs of the circuit, route the packed input data through the circuit according to the packed control ...

Intelligent substation network switch and edge calculation method

The invention discloses an intelligent substation network switch and an edge calculation method. The switch internally comprises a switch chip, an internal high-speed communication bus, a data bus, a control bus and a CPU. The switch chip is connected with the CPU through an internal high-speed communication bus; the switch chip is connected with the CPU through a data bus; the switch chip is connected with the CPU through a control bus; the switch chip comprises an ACL (Access Control List) module and a high-bandwidth CPU (Central Processing Unit) port; the ACL module can be used for realizing message matching setting and acquiring data; the high-bandwidth CPU port can meet edge computing requirements; the rate of the internal communication bus can meet the transmission requirement of a message from a CPU mirror image port of the switch chip to a CPU; mirror image message processing software and edge computing application software run on the CPU.

EVPN multicast ingress forwarder election using source-active route

The techniques describe example network systems providing core-facing designated forwarder (DF) election to forward multicast traffic into an EVPN of a core network. For example, a first PE device of a plurality of PE devices participating in an EVPN comprises one or more processors operably coupled to a memory, wherein the one or more processors are configured to: determine that a first multicast traffic flow has started for the first PE device; in response, send a source-active (SA) route to indicate the first multicast traffic flow has started for the first PE device; receive, from a second PE device, a second SA route that indicates that a second multicast traffic flow has started for the second PE device; and perform an election of a core-facing DF from among the first PE device and second PE device, wherein the core-facing DF is configured to forward the multicast traffic into the EVPN.

Message broadcasting method and device

The embodiment of the invention provides a message broadcasting method and device, applied to a first OVS of a first cabinet, the method comprises the following steps: acquiring a first message to be broadcasted, the first message belonging to a target tenant network; first addresses of other OVSs in the first cabinet under the target tenant network and second addresses of broadcast agents in other cabinets are determined according to pre-recorded addresses of all OVSs in the first cabinet under the different tenant networks and addresses of broadcast agents in all the cabinets under the different tenant networks, and one broadcast agent is one OVS; and broadcasting the first message to other OVSs of the first cabinet according to the first address and the second address, and broadcasting the first message to broadcast agents in other cabinets. According to the technical scheme provided by the embodiment of the invention, when the OVS broadcasts the message, only one message needs to be ...

Leveraging Multicast Listener Discovery for Discovering Hosts

Techniques for leveraging MLD capabilities at edge nodes of network fabrics to receive SNMAs from silent hosts, and creating unicast addresses from the SNMAs for the silent nodes that are used as secondary matches in a network overlay if primary unicast address lookups fail. The edge nodes described herein may act as snoopers of MLD reports in order to identify the SNMAs of the silent hosts. The edge nodes then forge unicast addresses for the silent hosts that match with the least three bytes of the SNMAs. The forged unicast addresses are presented as unicast MAC/IP mappings in the fabric overlay. In situations where a primary IP address lookup fails, the look-up device performs a secondary lookup for a mapped address that has the last three bytes of the IP address. If a mapping is found, the lookup is sent as a unicast message to the matching MAC address.

Media route handling

Techniques for operating a networking switch in two broadcast networks are provided. In some embodiments, the switch may instantiate a first controller client and a second controller client in a control plane of the switch; register the first controller client with a first broadcast controller associated with a first broadcast network; and register the second controller client with a second broadcast controller associated with a second broadcast network. The switch may further receive a first multicast route through the first controller client; receive a second multicast route through the second controller client; and program at least one of the first multicast route and the second multicast route into a multicast routing information base.

Leveraging multicast listener discovery for discovering hosts

Techniques for leveraging MLD capabilities at edge nodes of network fabrics to receive SNMAs from silent hosts, and creating unicast addresses from the SNMAs for the silent nodes that are used as secondary matches in a network overlay if primary unicast address lookups fail. The edge nodes described herein may act as snoopers of MLD reports in order to identify the SNMAs of the silent hosts. The edge nodes then forge unicast addresses for the silent hosts that match with the least three bytes of the SNMAs. The forged unicast addresses are presented as unicast MAC/IP mappings in the fabric overlay. In situations where a primary IP address lookup fails, the look-up device performs a secondary lookup for a mapped address that has the last three bytes of the IP address. If a mapping is found, the lookup is sent as a unicast message to the matching MAC address.

Combining with variable limited buffer rate matching

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first transmission including encoded bits of a data packet and a second transmission including some or all of the encoded bits of the data packet. The first transmission associated with a first limited buffer rate matching (LBRM) configuration and the second transmission may be associated with a second LBRM configuration. The UE may process the first transmission and the second transmission based on the first LBRM associated with the first transmission being different than the second LBRM associated with the second transmission.

Method and system for transmitting data over wireless network

One aspect of the invention provides a method of transmitting data over a wireless network. The method includes: maintaining a plurality of data packets within a first buffer; and encoding, within the first broadcast packet, at least some of the data packets within the first buffer. A broadcasting device transmits a first broadcast packet over a wireless network. The method further includes maintaining a plurality of data packets within a second buffer and encoding at least some of the data packets within the second buffer within a second broadcast packet. The broadcasting device transmits the second broadcast packet over the wireless network. The method further includes, upon detecting an overflow of the first buffer, removing the data packet from the first buffer, and adding the removed data packet to the second buffer.

Extended spectrum TDMA signal switching cable tap box

A method of proprietary TDMA (Time-Division Multiple Access) data modulated signals nonlinear signal splitting (switching) system is disclosed. Said TDMA system operates over distribution CATV infrastructure and in ES (extended spectrum) that is usually allocated above in the frequency band comparing to one defined in the CATV DOCSIS standard. Said system is meant to increase data throughput capacity over existing CATV based systems targeting primarily ES (Extended Spectrum band) by means of TDMA approach. The purpose of the RF switches based tap box is to connect specific device to which TDMA packet is relayed to. This approach reduces excessive losses that are present in standard tap boxes by disconnecting other devices, which are not receiving or sending related TDMA data packets. The described method introduces switch control receiver concept that allows for configuration of various operation modes such as regular switched TDMA, amplified and broadcast modes.

Load distribution across superclusters

Examples described herein relate to apparatuses and methods for managing communications within a supercluster or across superclusters, including a first supercluster having a plurality of first machines and a publish-subscribe (Pub-Sub) channel to which each of the plurality of first machines is subscribed. A second supercluster has a plurality of second machines and a bridge between the first supercluster and the second supercluster. A first machine is configured to receive, via the bridge, an availability status and resource allocation information of each second machine and publish, on the Pub-Sub channel of the first supercluster, the availability status and the resource allocation information.

SYSTEMS FOR AND METHODS OF REDUCING BIAS IN MULTICAST REPLICATION SEQUENCE

A method of reducing bias in multicast replication, the method comprising receiving a packet at a network device and determining a multicast group from the packet. The method further includes obtaining at least two or more destinations corresponding to the multicast group, replicating the packet for the at least two or more destinations, and forwarding the replicated packet to the at least two or more destinations in a randomized sequence.

Multicast replication method and device of cross-chip flow processing unit

The invention discloses a multicast replication method and device of a cross-chip flow processing unit, and the method comprises the steps: a source end chip flow processing unit receives a multicast message; a pre-copy engine in the source end chip flow processing unit generates index entries according to the multicast information of the multicast message and the message feature information, and matches a preset copy table to judge the distribution of effective members of the multicast message; the copy table is preset in a chip by an upper layer system according to distribution of multicast group members in each chip flow processing unit and member information of an aggregation port; and a pre-copy engine in the source end chip flow processing unit selects a copy multicast message according to the distribution information of the effective members and sends the copy multicast message to a multicast table item module in the corresponding destination end chip flow processing unit. Through ...

Stateful/stateless mixed multicast data forwarding method

The invention belongs to the technical field of network communication and data processing, and particularly relates to a stateful/stateless mixed multicast data forwarding method, which comprises the following steps of: forwarding a multicast data message by adopting a stateful forwarding mechanism, a stateless forwarding mechanism or a stateful and stateless mixed forwarding mechanism; the router preferentially forwards the multicast data message by using a stateful forwarding mechanism; the router selects a corresponding forwarding mechanism to forward the multicast data message according to the number of multicast forwarding table items of the next-hop router; the stateful/stateless mixed multicast data forwarding method can effectively balance the forwarding overhead, the forwarding state and the control overhead of the router, thereby improving the multicast expansibility.

Cache processing method and device, switching equipment and storage medium

The embodiment of the invention provides a cache processing method and device, switching equipment and a storage medium, and relates to the technical field of communication, the method is applied to the switching equipment, multiple levels of message copy linked lists are pre-stored in the switching equipment, and at least one target node is preset on the first level of message copy linked list; the method comprises the following steps: in response to a message copying instruction, allocating a total cache value of a multi-level message copying linked list to each target node based on a copying number required by each level of message copying linked list and a first preset cache value allocation strategy. And for each target node, in the process of copying each message, allocating the cache value allocated by the target node to each message copied in each level of message copying linked list. And when each message is sent, obtaining the cache value allocated to each sent message again, ...

Survivability method for LISP based connectivity

The present disclosure provides systems, methods and computer-readable media for maintaining network connectivity, in a LISP based network, when one or more network edge nodes lose connectivity to a LISP control plane of the network, using multicast messaging. In one example, a method includes receiving a connection request from a first endpoint to a second endpoint communicatively coupled to a second edge node; determining, by the first edge node, that a connection session to a control plane for locating the second endpoint has failed; querying one or more available edge nodes for locating the second endpoint using a multicast message; locating the second endpoint based on at least one query response received from the one or more available edge nodes, at least one query response including an identifier of the second endpoint; and establishing the connection request between the first endpoint and the second endpoint upon locating the second endpoint.

Undermine communication method based on intrinsic safety type network switch

The invention relates to the field of underground communication, in particular to an underground communication method based on an intrinsic safety type network switch, and the method comprises the steps: determining the space range and inclination angle of each underground roadway and the signal area coverage range of the intrinsic safety type network switch; intrinsic safety type network switches are installed at the entrance of a mine hole on the ground and in all roadways under the ground, and portable intelligent terminals are arranged and are in wireless connection with the intrinsic safety type network switches. Obtaining the number of portable intelligent terminals in each underground roadway; different communication modes are adopted according to the number of the portable intelligent terminals; when the portable intelligent terminal reaches a signal coverage limit distance, generating an alarm signal and sending the alarm signal to the intrinsic safety type network switch of the ...

KVM equipment cascading method, system and equipment and storage medium

The invention discloses a KVM equipment cascading method, system and equipment and a storage medium, and the method comprises the steps: verifying a host under a cascading system, renaming each matrix after verification is completed, completing the configuration of the system, restarting the system after the configuration is completed, determining a main matrix and a sub-matrix according to the sequence of the matrixes during the configuration of the system, and carrying out the cascading of the main matrix and the sub-matrix; uniformly reporting information stored in the sub-matrixes to the main matrix for storage, and then broadcasting the information to all the sub-matrixes to complete data synchronization of the cascade system; cascading of the multiple hosts can be achieved by accessing the multiple hosts to the same network segment, after several cascade subsystems are added to the same network segment, a new and larger cascade system can be formed, use is convenient, the deployment ...

Resolving label depth and protection in segment routing

A source node in a first domain in a multi-domain network includes a plurality of ports; and switching circuitry configured to forward packets between the plurality of ports, wherein the source node is configured to, for a packet destined for a destination node in another domain in the multi-domain network, add a list of Segment Identifiers (SIDs) to the packet for loose source-based routing from the source node, through the first domain, and to the another domain, and forward the packet via a port of the plurality of ports and with the list of SIDs, wherein the list of SIDs includes at least one SID representing both an anycast SID and a binding SID. The SID is associated with an anycast group that includes a plurality of nodes, and with a binding segment in the second domain, the binding segment includes a different SID list for each node of the plurality of nodes.

System and method for supporting dual-port virtual router in a high performance computing environment

Systems and methods for supporting dual-port virtual router in a high performance computing environment. In accordance with an embodiment, a dual port router abstraction can provide a simple way for enabling subnet-to-subnet router functionality to be defined based on a switch hardware implementation. A virtual dual-port router can logically be connected outside a corresponding switch port. This virtual dual-port router can provide an InfiniBand specification compliant view to a standard management entity, such as a Subnet Manager. In accordance with an embodiment, a dual-ported router model implies that different subnets can be connected in a way where each subnet fully controls the forwarding of packets as well as address mappings in the ingress path to the subnet.

Leveraging multicast listener discovery for discovering hosts

Techniques for leveraging MLD capabilities at edge nodes of network fabrics to receive SNMAs from silent hosts, and creating unicast addresses from the SNMAs for the silent nodes that are used as secondary matches in a network overlay if primary unicast address lookups fail. The edge nodes described herein may act as snoopers of MLD reports in order to identify the SNMAs of the silent hosts. The edge nodes then forge unicast addresses for the silent hosts that match with the least three bytes of the SNMAs. The forged unicast addresses are presented as unicast MAC/IP mappings in the fabric overlay. In situations where a primary IP address lookup fails, the look-up device performs a secondary lookup for a mapped address that has the last three bytes of the IP address. If a mapping is found, the lookup is sent as a unicast message to the matching MAC address.

Multicast-only thin DODAG in low power and lossy network

In one embodiment, a method comprises: generating, by a constrained low power and lossy network (LLN) device that is localized within a subregion of an LLN, a thin destination oriented directed acyclic graph (DODAG) having up to a prescribed limit of attached LLN devices at each hop of the thin DODAG based on generating a DODAG information object (DIO) message specifying an instruction for limiting attachment at each hop of the thin DODAG to the prescribed limit; and causing, by the constrained LLN device, multicast-only transmissions via the thin DODAG based on inserting into the DIO message a multicast-only transmission mode via the thin DODAG and outputting the DIO message, the DIO message causing each neighboring LLN device to selectively attach to the constrained LLN device as an attached child LLN device based on the instruction and execute the multicast-only transmissions via the thin DODAG.

METHOD FOR CONTROL SIGNALLING OVERHEAD IN AN ACCESS NETWORK

OPTIMIZED MULTICAST FORWARDING WITH A CACHE

Multicast message copying method and device, electronic equipment and storage medium

The embodiment of the invention provides a multicast message copying method and device, electronic equipment and a storage medium, and relates to the technical field of message processing, and the method comprises the following steps: under the condition that a transmission object corresponding to a to-be-transmitted message comprises a target multicast group, aiming at each target port belonging to a link aggregation mapping table, based on the link aggregation mapping table, transmitting the target multicast group to the target port; determining a target link aggregation group corresponding to each target port, determining a first member port corresponding to the target link aggregation group, determining a message hash value of a to-be-transmitted message, determining a second member port from a BlockMask table, determining an exit port of the to-be-transmitted message based on the first member port and the second member port, and transmitting the to-be-transmitted message based on the ...

Network multicast using backup indication set

The embodiment of the invention relates to network multicast using a backup indication set. Apparatus, systems, and techniques for multicast of transactions to a target group. In at least one embodiment, a set is selected from a backup indication set associated with the target group, and transactions are transmitted to the target group in accordance with the selected set.

Network aware orchestration method and system for multicast services

Presented herein is an exemplified system and method that facilitate network-aware orchestration of similar sets of virtualized multicast-traffic receivers and/or sources (e.g., Virtual Machines) under a common network fabric element (e.g., same leaf switch and/or spine switch in a data center network fabric), e.g., to reduce network switch work load and/or number of network fabric elements involved with transmission of multicast traffic. The orchestration of scattered- and like-sets of multicast-traffic receivers and/or sources under a common network fabric element (e.g., a single and same leaf switch and/or spine switch) facilitates improvements of the operation of orchestration management technologies and virtualization overlay technologies by, e.g., improving network efficiency for multicast packet switching, reducing control plane traffic (e.g., IGMP queries), and reducing delay- and packet-transfer errors.

System and method of wireless communication using a dynamic multicast distribution scheme

A system and method of wireless communication includes a host application running on a server. A plurality of communication devices are in communication with the host application and configured to send and receive data packets between others of the communication devices via the host application. The data packets containing digital information related to at least one type of media content. The host application receives the data packets and distributes the data packets according to a dynamic multicast distribution scheme. The dynamic multicast distribution scheme changes, for each communication device, according to at least one communication metric through WiFi modulation, forward error correction, or audio codec sampling and bit rates.

Communication method and related equipment

The embodiment of the invention discloses a communication method and a related device, which are used for realizing that a multicast message is only forwarded to a corresponding multicast terminal under the condition that a distributed switch is not configured with IGMP (Internet Group Management Protocol) snooping. Comprising the following steps: a first network device sends a first message to a second network device, the first message comprises N target port identifiers, N is an integer greater than or equal to 1, and the N target port identifiers are used for the second network device to send a second message to N target terminals, the N target port identifiers are used for indicating N target ports connected between the second network equipment and the N target terminals.

Method to provide broadcast/multicast support in public cloud

Techniques and architecture are described for providing broadcast/multicast support using VXLAN in and among private on-premises/cloud networks and public cloud networks by defining peer groups comprising VXLAN tunnel endpoints (VTEPs) within clustered network security devices. For example, a static peer group comprising two or more virtual extensible local access network (VXLAN) tunnel end points (VTEPs) is defined. The two or more VTEPs may each comprise a data interface of a network security device. Based at least in part on the static peer group, an overlay network comprising the two or more VTEPs is defined. A network security device discovers available VTEPs within the static peer group. The network security device establishes a mesh network of available VTEPs.

EVPN multicast ingress forwarder election using source-active route

The techniques describe example network systems providing core-facing designated forwarder (DF) election to forward multicast traffic into an EVPN of a core network. For example, a first PE device of a plurality of PE devices participating in an EVPN comprises one or more processors operably coupled to a memory, wherein the one or more processors are configured to: determine that a first multicast traffic flow has started for the first PE device; in response, send a source-active (SA) route to indicate the first multicast traffic flow has started for the first PE device; receive, from a second PE device, a second SA route that indicates that a second multicast traffic flow has started for the second PE device; and perform an election of a core-facing DF from among the first PE device and second PE device, wherein the core-facing DF is configured to forward the multicast traffic into the EVPN.

Wireless dongle facilitated mobile transactions

Computing systems and methods for facilitating mobile transactions are disclosed. An example method includes: detecting, via a hardware communication interface, a user check-in request based at least on a communication exchange between a user device and a signaling device at a location. The communication exchange corresponds to a proximity of the user device to the signaling device. The method further includes: determining a user identifier associated with the user device based at least on the user check-in request; and transmitting one or more promotional items to the user device based at least on the user identifier.

Hydropower centralized control operator station extension system and method

The invention discloses a hydropower centralized control operator station extension system and method, the system comprises a power station side monitoring system and a remote extension system, the power station side monitoring system comprises a host, a local operator work station and a local conversion server; the remote extension system comprises a remote conversion server and an extension operator station, and the remote conversion server and the extension operator station are both connected with the extension side main switch; the local conversion server and the remote conversion server are connected through a TCP, the local conversion server is used for packaging a received multicast message in the power station side monitoring system into a TCP message and transmitting the TCP message to the remote conversion server, and the remote conversion server is used for unpackaging the received TCP message into the multicast message and carrying out multicast in the remote extension system ...

Hierarchical hardware linked list approach for multicast replication engine in a network ASIC

A multicast rule is represented in a hierarchical linked list with N tiers. Each tier or level in the hierarchical linked list corresponds to a network layer of a network stack that requires replication. Redundant groups in each tier are eliminated such that the groups in each tier are stored exactly once in a replication table. A multicast replication engine traverses the hierarchical linked list and replicates a packet according to each node in the hierarchical linked list.

Aggregated bit index explicit replication networking system

An aggregated BIER networking system includes first and second aggregated BFER devices that are each directly connected to first and second receiver devices. The first aggregated BFER device receives a request from the first receiver device for multicast data packets generated by a source device and transmits the request to a BFIR device. The first aggregated BFER device also receives an identification from the second aggregated BFER device of the second receiver device that has requested multicast data packets generated by the source device. The first aggregated BFER device advertises a virtual BFER device that appears to be directly connected to each of the first and second aggregated BFER devices, and each of the first and second receiver devices. The first aggregated BFER device then receives a multicast data packet identifying the virtual BFER device, and forwards the multicast data packet to each of the first and second receiver devices.

Loop prevention in virtual layer 2 networks

Techniques for loop prevention while allowing multipath in a virtual Layer 2 (L2) network are described. In an example, a network interface card (NIC) supports the virtual L2 network. The NIC is configured to receive, via a first port of the NIC, an L2 frame that includes a source media access control (MAC) address and a destination MAC address. Based on a loop prevention rule, the NIC transmits the L2 frame via its ports except the first port. In an additional example, the NIC is further configured to send an L2 frame to a host via the first port of the NIC. The L2 frame can be a bridge protocol data unit (BPDU). Upon receiving a BPDU from the host via the first port, the NIC determines that the BPDU is looped back and disables the first port.

Radio resource control RRC message processing method, apparatus, and system

Embodiments of the present invention relate to a radio resource control RRC message processing method, apparatus, and system. The method includes: setting up, by a first serving node, a connection to a first anchor node, and setting up, by the first anchor node, a connection to a mobility management entity MME; receiving, by the first serving node, a radio resource control RRC message sent by first user equipment UE, where the RRC message includes an RRC message carried by a signaling radio bearer SRB1 or an RRC message carried by an SRB2; and sending, by the first serving node, the RRC message to the first anchor node.

System and method of wireless communication using destination based queueing

A method and system for communication between devices includes connecting a plurality of communication devices through a communication system. At least one communication device acts as a source entity sending a plurality of data packets to an access point. A plurality of communication devices act as destination entities receiving the data packets. The data packets are distributed, by the access point, to the destination entities in such a way that the data packets are queued for receipt by each destination entity in a separate non-interdependent queue.

Method for reduced programming of selective multicast routes in EVPN fabric

At a provider edge (PE) router of PE routers of an Ethernet virtual private network (EVPN) configured to implement a border gateway protocol (BGP): receiving, from a multicast receiver, a multicast join for multicast traffic originated from a multicast source; identifying a next hop PE router for the multicast source; generating an EVPN route to the PE router, the EVPN route including an EVPN instance-route target that identifies the EVPN, and a specifically targeted route target that identifies the next hop PE router and that is configured to override the EVPN instance-route target to cause only the next hop PE router, and not any other of the PE routers, to import the EVPN route, when the EVPN route is advertised across the EVPN to the PE routers; and advertising the EVPN route across the EVPN to the PE routers.

ON-CHIP NETWORK DESIGN METHOD FOR DISTRIBUTED PARALLEL OPERATION ALGORITHM

The present disclosure relates to an on-chip network design method for a distributed parallel operation algorithm. According to a distributed parallel operation algorithm of an on-chip network, the on-chip network is divided into two layers, including a unicast network and a multicast network, where the unicast network is configured to implement point-to-point propagation between nodes and transmit independent operation data required by operation nodes to each operation node in a form of unicast; and the multicast network is a customized multicast network for the distributed parallel operation algorithm and configured to transmit common operation data to all the operation nodes, such that a data packet in the network is efficiently transmitted through a combination of the unicast network and the multicast network. By designing a multicast tree transmission architecture for the distributed parallel operation algorithm, a bidirectional replication node or a receiving node is disposed in each ...

LOAD DISTRIBUTION ACROSS SUPERCLUSTERS

Examples described herein relate to apparatuses and methods for managing communications within a supercluster or across superclusters, including a first supercluster having a plurality of first machines and a publish-subscribe (Pub-Sub) channel to which each of the plurality of first machines is subscribed. A second supercluster has a plurality of second machines and a bridge between the first supercluster and the second supercluster. A first machine is configured to receive, via the bridge, an availability status and resource allocation information of each second machine and publish, on the Pub-Sub channel of the first supercluster, the availability status and the resource allocation information.

Methods and apparatus to manage a physical network to reduce network dependencies in a multi-fabric virtual network

An example first server host includes processor circuitry to: connect a virtual network interface card (vNIC) of the first server host to a first physical network interface card (pNIC) and a second pNIC of the first server host; establish an inter-switch link between first and second switches, the first switch and the first server host in a first network fabric, the second switch and a second server host in a second network fabric; and cause transmission of a first and second network packets from the vNIC of the first server host, the first and second network packets to be delivered to the second server host via the inter-switch link, the first network packet to be transmitted via the first pNIC when utilization of the first pNIC does not satisfy a threshold, the second network packet to be transmitted via the second pNIC when the utilization satisfies the threshold.

Systems and methods to support node mobility in wireless networks

A network includes a mobile network node (MNN) that includes a mobile node communications manager (MNCM) to facilitate wireless communications to a plurality of stationary network nodes (SNNs) in a wireless network via a wireless network protocol. The MNCM utilizes a multicast address received over the wireless network. The multicast address is assigned to a predetermined network time slot to communicate uplink data from the MNN to the SNNs. The MNN receives downlink data via a separate predetermined network address and time slot assigned to a given SNN.

System and method to provide homogeneous fabric attributes to reduce the need for SA access in a high performance computing environment

Systems and methods for InfiniBand fabric optimizations to minimize SA access and startup failover times. A system can comprise one or more microprocessors, a first subnet, the first subnet comprising a plurality of switches, a plurality of host channel adapters, a plurality of hosts, and a subnet manager, the subnet manager running on one of the one or more switches and the plurality of host channel adapters. The subnet manager can be configured to determine that the plurality of hosts and the plurality of switches support a same set of capabilities. On such determination, the subnet manager can configure an SMA flag, the flag indicating that a condition can be set for each of the host channel adapter ports.

Queue filter configuration for multicast packet handling

Example methods are provided for a host to perform queue filter configuration for multicast packet handling in a software-defined networking (SDN) environment. One example method may comprise the host generating and sending a request to join an outer multicast group address to one or more multicast-enabled network devices; and configuring a queue filter based on the outer multicast group address. In response to detecting an ingress encapsulated multicast packet that includes an outer header addressed to the outer multicast group address, the host may assign the ingress encapsulated multicast packet to a particular NIC queue from the multiple NIC queues based on the queue filter; and retrieving, from the particular NIC queue, the ingress encapsulated multicast packet to generate and send a decapsulated multicast packet to a virtualized computing instance.

METHODS AND APPARATUS TO MANAGE A PHYSICAL NETWORK TO REDUCE NETWORK DEPENDENCIES IN A MULTI-FABRIC VIRTUAL NETWORK

An example system including a first top-of-rack (ToR) switch, and a second ToR switch, the second ToR switch is to receive a network packet from a first host, the network packet to include a destination address of a second host, and after a failure of a physical network interface card (pNIC) at the second host eliminates a first link between the second host and the second ToR switch, send the network packet to the first ToR switch via an inter-switch link between the first and second ToR switches to cause the first ToR switch to forward the network packet to the second host via a second link between the first ToR switch and the second host.

Link aggregation group failover for multicast

A method of multicasting packets by a forwarding element that includes several packet replicators and several egress pipelines. Each packet replicator receives a data structure associated with a multicast packet that identifies a multicast group. Each packet replicator identifies a first physical egress port of a first egress pipeline for sending the multicast packet to a member of the multicast group. The first physical egress port is a member of LAG. Each packet replicator determines that the first physical egress port is not operational and identifies a second physical port in the LAG for sending the multicast packet to the member of the multicast group. When a packet replicator is connected to the same egress pipeline as the second physical egress, the packet replicator provides the identification of the second physical egress port to the egress pipeline to send the packet to the multicast member. Otherwise the packet replicator drops the packet.

System and method to control latency of serially-replicated multi-destination flows

Exemplified systems and methods facilitate multicasting latency optimization operations for router, switches, and other network devices, for routed Layer-3 multicast packets to provide even distribution latency and/or selective prioritized distribution of latency among multicast destinations. A list of network destinations for serially-replicated packets is traversed in different sequences from one packet to the next, to provide delay fairness among the listed destinations. The list of network destinations are mapped to physical network ports, virtual ports, or logical ports of the router, switches, or other network devices and, thus, the different sequences are also traversed from these physical network ports, virtual ports, or logical ports. The exemplified systems and methods facilitates the management of traffic that is particularly beneficial in in a data center.

BIER multicast message processing method and device

The invention discloses a BIER multicast message processing method and device, and belongs to the technical field of network communication. The processing method comprises the following steps: the message processing chip receives a BIER multicast message and judges whether the BIER multicast message is the first BIER multicast message in a BIER multicast stream; the message processing chip responds to the first BIER multicast message in the BIER multicast stream, and forwards the BIER multicast message to the configuration issuing chip; and the message processing chip receives a message editing configuration corresponding to the BIER multicast message, and carries out forwarding processing on a subsequent BIER multicast message in the BIER multicast stream according to the message editing configuration. According to the invention, high-bandwidth and high-performance BIER multicast message forwarding processing can be realized.

CROSSBAR MULTIPATHING FOR MULTICAST PERFORMANCE IN TILED SWITCHES

A method is provided for operating a network switch comprising a plurality of input ports and a plurality of output ports. The method comprises receiving a first data packet received via a first input port and a second data packet received via a second input port to be delivered to an egress endpoint connected to a first output port, configuring a plurality of crossbar switch units arranged in a tiled architecture to pass the first data packet to the first output port via a primary path and pass the second data packet to the first output port via a secondary path, and transmitting the first data packet and the second data packet to the egress endpoint. The first data packet and the second data packet pass through the plurality of crossbar switch units simultaneously.

Distributed networked high-reliability communication system and method applied to spacecraft

The invention discloses a distributed networked high-reliability communication system and method applied to a spacecraft, and the system comprises a data exchange device which serves as a central node of a communication network, and achieves the information transmission between terminals in the communication network through a self-inspection and dual-network-port switching method; the measurement and control combination is used for wirelessly telemetering and downloading telemetering data and writing the telemetering data into the storage device; the control combination generates key information and sends the key information to the measurement and control combination through the communication network; the sensor transmits external environment information to the control combination and the measurement and control combination through a communication network; the acquisition device transmits the internal environment information to the control combination and the measurement and control combination ...

Methods and apparatuses for source discovery

A disclosed method is performed at a first boundary node bordering a BIER domain. The method includes receiving a message associated with a source and group for multicast from outside the BIER domain. The method further includes generating an encapsulated message based on the message, a metric, and a first proxy address of the first boundary node. The method also includes forwarding the encapsulated message through the BIER domain to at least one second boundary node bordering the BIER domain and connectable to the first boundary node. The first boundary node additionally triggers the at least one second boundary node to decapsulate the encapsulated message for forwarding out of the first domain and store a record including the source, the group, the metric representing the cost of the first boundary node to the source, and the first proxy address on the at least one second boundary node.

Message multicast method and device, electronic equipment and medium

The invention discloses a message multicast method and device, electronic equipment and a medium. According to the technical scheme, when the switch receives the message, the message is not directly forwarded, and the node information configured by a user in the multi-dimensional linked list and used for correspondingly processing the message is obtained through interaction with the user configuration module. Therefore, the message is processed subsequently based on the processing rule reflected by the node information. Therefore, the problem that the user service processing process is affected due to the fact that the switch is only responsible for forwarding the message and cannot process the message to a certain degree in the prior art is solved.