130 results about "Ethernet frame" patented technology

The invention relates to an ultra-high-speed large-flow Ethernet data generation system and method. The system comprises a software unit and an FPGA unit. The software unit is used for generating stream template data and issuing the stream template data to the FPGA unit; the stream template data comprises stream template configuration items and dynamic configuration parameters; the flow template configuration item comprises protocol header information, scheduling configuration information, frame length configuration information and load configuration information; the dynamic configuration parameters comprise dynamic jump configuration information, routing table configuration information and the like; and the FPGA unit is used for storing, reading and calculating the issued stream template data, realizing intra-frame jump value calculation, message and IP head checksum generation, Ethernet frame construction and transmission. Through combination of software and hardware methods, the demand quantity of hardware resources can be reduced, the consumption of logic resources of the FPGA unit can be reduced, the phenomena of high and low speed operation environments, network congestion and the like in the existing network can be simulated, and diversified simulation environments can be provided.

The invention discloses an SCD (Substation Configuration Description) file consistency verification method based on SV (Sampled Value) and GOOSE (Generic Object Oriented Substation Event) messages, which comprises the following steps of: respectively acquiring actual process layer network parameters of the SV messages and various GOOSE messages in Ethernet frame data of an SCD model file and a process layer network, actual model information of corresponding control blocks and actual data set information associated with the corresponding control blocks; according to the method, the SCD file is directly compared with the in-station SV and GOOSE messages, the consistency with the in-station actual situation can be guaranteed, the method is compatible with various protection devices before and after nine-unification, the model consistency can be verified by analyzing the real-time communication messages of process layer equipment, and the method has the advantages that the method is simple and convenient to operate and high in practicability. And the accuracy and the reliability of a checking result are fundamentally ensured.

Techniques for tunneling Layer 2 ethernet frames over a connection tunnel using the MASQUE protocol are described herein. The MASQUE protocol may be extended to include a new entity, configured to proxy ethernet frames using a MASQUE proxy connection, and an associated CONNECT method, CONNECT-ETH. Using the extended MASQUE protocol, an Ethernet over MASQUE (EoMASQUE) tunnel may then be established between various networks that are remote from one another and connected to the internet. An EoMASQUE tunnel, established between separate remote client premises, and / or between a remote client premise and an enterprise premise, may tunnel ethernet packets between the endpoints. Additionally, a first EoMASQUE tunnel, established between a first client router provisioned in a first remote client premise and an EoMASQUE proxy node, and a second EoMASQUE tunnel, established between a second client premise and the EoMASQUE proxy node, may tunnel ethernet packets between the first and second client premise.

The invention belongs to the field of communication network fault detection, and particularly discloses an Ethernet physical layer line connection fault detection and positioning method and system, a storage medium and a product, and the method comprises the steps that a master station of the Ethernet sends Ethernet frames containing sequential addressing bits, each slave station processes the Ethernet frames in sequence according to a connection sequence, and the Ethernet frames are processed by the slave stations; meanwhile, sequentially addressing bits are progressively increased; each slave station detects a PHY chip clock frequency and a state register of the network port in real time; and when any slave station detects that the clock frequency of the PHY chip of the network port is reduced below a preset threshold value or the state register is link-down, judging that a disconnection fault occurs, returning the Ethernet frame to the master station from the network port of the corresponding slave station, and judging a disconnection position by the master station according to a sequential addressing bit of the received Ethernet frame. According to the method, the reliability and the response speed of disconnection detection are improved, disconnection detection can be triggered after the physical layer is disconnected under the condition of hybrid network topology communication, the disconnection position is positioned, and a network topology structure is reformed.

Techniques for tunneling Layer 2 ethernet frames over a connection tunnel using the MASQUE protocol are described herein. The MASQUE protocol may be extended to include a new entity, configured to proxy ethernet frames using a MASQUE proxy connection, and an associated CONNECT method, CONNECT-ETH. Using the extended MASQUE protocol, an Ethernet over MASQUE (EoMASQUE) tunnel may then be established between various networks that are remote from one another and connected to the internet. An EoMASQUE tunnel, established between separate remote client premises, and / or between a remote client premise and an enterprise premise, may tunnel ethernet packets between the endpoints. Additionally, a first EoMASQUE tunnel, established between a first client router provisioned in a first remote client premise and an EoMASQUE proxy node, and a second EoMASQUE tunnel, established between a second client premise and the EoMASQUE proxy node, may tunnel ethernet packets between the first and second client premise.

Some embodiments provide a method of forwarding data messages between EPUs that are connected through a network and that perform computations to collectively execute a distributed application. The method generates, for each computation of each source EPU, a data message flow having one or more data messages that store a result of the computation. The generating includes specifying, for each data message, an Ethernet header having a field that identifies the data message as an Ethernet frame and a MAC field that instead of a MAC address stores a tag for forwarding the data message to a destination in the network. The method uses, at each forwarding element that forwards each data message, the tag stored in the MAC field of the data message's header to identify an egress port of the forwarding element to forward the data message along a path through the network to the data message's destination.

The embodiment of the invention is suitable for the technical field of vehicles, and provides a vehicle-mounted Ethernet data transmission method and device, a vehicle and a storage medium, and the method comprises the steps that a receiver receives an Ethernet data packet; the Ethernet data packet comprises an Ethernet frame header, a data header and application layer data; the header of the Ethernet frame carries a target physical address of a target receiver; the receiver judges whether the Ethernet frame header is a target receiver or not according to the Ethernet frame header; and if the receiving party is the target receiving party, analyzing the application layer data from the Ethernet data packet. By adopting the method, the levels of packaging and processing the application layer data in the Ethernet transmission process can be reduced, and the efficient transmission of the application layer data is realized.

A vehicle-mounted relay device for relaying Ethernet frames includes a plurality of PHY units corresponding to a plurality of vehicle-mounted devices, a switch unit to which the plurality of PHY units are connected, and a control unit configured to monitor operating states of the plurality of PHY units. The plurality of PHY units include a predetermined PHY unit whose operating state switches between a sleep state and an active state in response to reception of a predetermined control signal that differs from the Ethernet frames. When an Ethernet frame to be transmitted from the predetermined PHY unit has been detected during a period where the predetermined PHY unit is in the sleep state, the control unit executes switching control to switch the predetermined PHY unit to the active state.

The invention relates to the technical field of network communication integrated circuits, and discloses a method for quickly exchanging Ethernet messages between a chip-level CPU (Central Processing Unit) and a SWITCH, which comprises the following steps of: constructing an Ethernet frame buffer pool in an on-chip memory, dividing the Ethernet frame buffer pool into storage blocks with fixed lengths, and distributing a unique frame index; when the sending process is executed, the central processing unit writes data and submits a frame index to the switch core, and the frame index is read and transmitted by the target port; when a receiving process is executed, a switch port prefetches a frame index and writes data, and the data are processed by a switch core and then notified to be read by a central processing unit; and the central processing unit, the switch core and the port transfer the control right of the storage block through the transfer frame index. Through the shared buffer pool and an index transmission mechanism, copying and carrying of message data between the central processing unit and the switch are avoided, bandwidth occupation and processing delay of a bus in a chip are reduced, and message interaction efficiency is improved.

A network device may receive a packet having a tunneling header. The tunneling header may include metadata. The network device may transcode the metadata for insertion into an Ethernet frame. The network device may output the Ethernet frame containing the transcoded metadata.

A method for transmitting secured Ethernet frames on a communication line, the method including the following in a transmitter module: receiving an Ethernet frame comprising payload data from a network layer; retrieving a secure policy, defining the type of security to be applied to the Ethernet frame; producing an initialization vector based on an encryption counter and a physical address of the transmitter module; creating an authentication tag by applying an authentication algorithm on the secure policy, the initialization vector and the payload data using a shared key and the initialization vector; adding the secure policy, the initialization vector and the authentication tag to the payload data to create a secured Ethernet frame; and sending the secured Ethernet frame to a data link layer for transmission on the communication line.

A method, system, and apparatus for parsing incoming frames; classifying the frames by information contained in a header of the ethernet frame; and performing an action on the classification.

The embodiment of the present application provides a bridge transparent proxy method, apparatus, storage medium and device. In this method, the Linux bridge of the transparent proxy device is configured, and two service ports required for forwarding are added to the Linux bridge. When the SYN message sent by the client is intercepted, the Ethernet frame header information including the MAC address information and the SYN input interface index in the SYN message is saved, and then the saved Ethernet frame header information is reversed with the source MAC address and the destination MAC address using a specified hook point and added to the constructed SYN-ACK message, and the target SYN message is sent out from the SYN input interface to establish a connection with the client. When establishing a connection with the server, the saved Ethernet frame header information is added to the constructed target SYN message and sent out from another service port on the Linux bridge other than the SYN input interface. In this way, a transparent proxy is realized in the transparent bridge mode of the switching network, without changing the network topology, without configuring IP and routing, and is easy to implement.

Systems, apparatus, articles of manufacture, and methods for precisely timestamping Ethernet frames are described. In some embodiments, an apparatus may include network interface circuitry; logic circuitry configured to execute instructions (500) to cause the logic circuitry to: determine (502) a first delay introduced by the physical coding sublayer circuitry at a first time; adjusting (504) a first timestamp associated with a first transmission based on the first delay, the first timestamp being transmitted with the first transmission; determining (502) a second delay introduced by the physical coding sublayer circuitry at a second time, the second delay being different from the first delay; and adjusting (504) a second timestamp associated with a second transmission based on the second delay, the second timestamp being transmitted (506) with the second transmission.

This disclosure describes techniques for interoperability of a blade server in a server chassis, where IOMs of the server chassis do not provide dedicated pins for communicating a physical slot ID to the blade server. BMCs of the blade servers and CMCs of IOMs of the server chassis are mutually configured to broadcast Ethernet frames on layer 2 network segments over a broadcast domain configured by a switch module connected to the blade servers over layer 2 network segments; conduct a slot inference communication protocol using these Ethernet frame broadcasts to enable the CMC to determine a physical slot ID in response to a BMC request, and broadcast that physical slot ID back to the BMC; and use a public certificate-private certificate pair, based in a hardware root of trust, to enforce security of this communication protocol.

A transmitter module, a receiver module and a communication system for exchanging Ethernet Medium Access Control (MAC) frames on a single Multipoint Low Voltage Differential Signaling (M-LVDS) line. The transmitter module includes: a first transmitter media-independent interface (MII) including parallel data lines for receiving bits of an Ethernet MAC frame to be transmitted on the single M-LVDS line: an 8b / 10b encoding unit adapted to encode 8-bit words to produce 10-bit words, wherein the 8-bit words include bits of the Ethernet MAC frame received on the parallel data lines of the first transmitter MII; a serializing unit adapted to serialize the 10-bits words; and an M-LVDS transmitter unit for transmitting the serialized 10-bit words on the single M-LVDS line.

The invention relates to the technical field of avionics communication. The invention provides an airborne satellite communication processing terminal. The airborne satellite communication processing terminal comprises a data control unit, a satellite data processing unit and a network processing unit, the satellite data processing unit sends data sent by a satellite to the data control unit; the data control unit performs communication protocol analysis and data format conversion on the received data; the data control unit sends the data subjected to communication protocol analysis and data format conversion to the network processing unit; the network processing unit encapsulates the received data into an Ethernet frame and then sends the Ethernet frame to the built-in network; the built-in network sends the received data to the data control unit through the Ethernet communication interface; and the data control unit encrypts the received data, converts the encrypted data into satellite signals and sends the satellite signals to a satellite. Satellite communication is converted into a universal Ethernet communication interface, and the compatibility problem of multi-platform interfaces is solved.

To realize handover by using a ring network that transfers Ethernet frames.SOLUTION: A ring node device uses only a lower address memory that stores the lower address of the MAC address and specifies frame transmission outside a ring, and a duplicated use lower address memory, and attaches an unnecessary lower address deletion bit to a communication start frame or a frame immediately after changing the destination base station, and transfers it on the counterclockwise ring, and when the lower address of the source MAC address of the frame arrives at a ring node device stored in the lower address memory that specifies frame transmission outside the ring of the ring node device or the duplicated use lower address memory, the lower address is deleted, the frame is copied, and the copy frame is sent outside the ring. The base station stores the lower address of the MAC address in the duplicated use lower address memory of the ring node device.SELECTED DRAWING: Figure 1

The application provides a deployment method of a honeypot, comprising the following steps: receiving tunnel data sent by a tunnel server and analyzing the tunnel data to output a target port number, wherein the tunnel data is derived from IP data packets of a public network attack end; querying a MAC mapping table based on the target port number, matching a virtual MAC address, obtaining a first Ethernet frame carrying the virtual MAC address, and forwarding the first Ethernet frame to a honeypot container so that the honeypot container generates a response packet; and returning the response packet to the public network attack end through the tunnel server. The method sets a MAC mapping table and a frame reconstruction operation at the honeypot host layer, ensures that the virtual MAC address is reserved in the Ethernet frame, makes the attack traffic always carry a virtual identity, avoids protocol layer stripping, maintains the original MAC layer context of the response packet generated by the honeypot container when the response packet is returned to the public network, and enhances the geographical camouflage effect.

The present application relates to a data transmission method, apparatus and system, an industrial device, a controller, and a storage medium. The method comprises: a target industrial device receiving a first Ethernet frame sent by a first industrial device in an industrial network, the first Ethernet frame carrying a first check value; generating a second check value on the basis of the first Ethernet frame; and when a check error occurs in the first Ethernet frame, determining an error type of the first Ethernet frame on the basis of the first check value and the second check value, the error type comprising a forwarding error or a receiving error. By means of the method, error diagnosis requirements of the industrial network can be met, and flexibility of error diagnosis during data transmission is improved.

The invention provides a network switching device and a network conversion device, and is applied to the technical field of communication, the network switching device comprises a 4G module and an Ethernet conversion module, and the 4G module is used for sending first data to the Ethernet conversion module; the Ethernet conversion module is connected with the 4G module, and is used for receiving the first data, converting the first data into an Ethernet frame, and transmitting the Ethernet frame to a wired network. According to the embodiment of the invention, the 4G module can be a CAT1 module, so that the 4G signal of the base station is converted into a wired network through the CAT1 module and the Ethernet conversion module, and the CAT1 module has a huge advantage in cost compared with a CAT4 module, so that the production cost is reduced.

A method may include obtaining an Ethernet frame. The method may also include determining a first priority for the Ethernet frame based on a quality-of-service classification. The method may further include segmenting the Ethernet frame into two or more segments. The method may also include adding metadata to the Ethernet frame or the two or more segments. The method may further include determining multiple links for transmitting the Ethernet frame. The method may also include obtaining values for each link of the multiple links. The method may further include computing a maximum allowed latency for each link of the multiple links. The method may also include selecting a first link of the multiple links based on the values for each link and the maximum allowed latency for each link. The method may further include queueing the Ethernet frame or the two or more segments for transmission using the first link.

The invention discloses a multi-protocol fusion bus interaction system and method, and relates to the technical field of intelligence information processing, the system comprises a protocol node, a bus device agent, a protocol converter, a Wi-Fi fusion layer and a device discovery center; the protocol node operates a guard process to maintain an equipment state and mark a message source node ID; the bus equipment agent is responsible for message filtering and cross-bus forwarding; the protocol converter encapsulates the data into Ethernet frames and transmits the Ethernet frames through Wi-Fi; protocol conversion is realized by the Wi-Fi fusion layer; the equipment discovery center dynamically manages the equipment and the bus list through heartbeat detection; the method comprises a message sending and receiving process and an equipment dynamic access process. According to the invention, a wired mode is replaced by Wi-Fi wireless transmission, so that the wiring cost is reduced; compatibility and transmission efficiency are improved through a protocol converter and intelligent message filtering; the system supports discovery and expansion of dynamic equipment, is suitable for complex industrial sites such as a data center, and has the advantages of high efficiency, expandability and easy maintenance.

The invention relates to a data transmission path determination method and device, computer equipment, a storage medium and a computer program product. Relates to the technical field of computer networks. The method comprises the following steps: receiving an IPv6 data packet sent by a first terminal; ethernet frames sent to the second terminal by the first terminal are packaged in the IPv6 data packet; extracting an identification tuple of the IPv6 data packet from the IPv6 data packet; the identification tuple is a parameter set used for identifying the IPv6 data packet; generating a hash value according to the identification tuple, and determining a corresponding routing table according to the prefix of the network address of the second terminal; selecting a target path from a plurality of equal-cost paths contained in a routing table according to the hash value; and forwarding the IPv6 data packet to the second terminal through the target path. By adopting the method, the efficiency of data transmission in an Ethernet virtual private network environment by an equal-cost multi-path routing technology can be improved.

The present application provides a communication method, a communication system, an electronic device, and a computer-readable medium, the communication method including: receiving an Ethernet frame sent by a first terminal; encapsulating a first port identification of the first slave gateway and the Ethernet frame into a first GEM frame, and sending the first GEM frame to a master gateway; the first port identification is a port identification for communication between optical network units.

The invention discloses a method for a gateway device to transmit an I P data packet based on a Beidou short message. The method comprises the following steps: S1, preparing and initializing a sending end gateway device; s2, monitoring the network state of the gateway equipment, and switching a transmission mode when a network fault is judged; s3, the gateway device captures an IP data packet sent by the edge device and converts the IP data packet into a text format to form a complete Beidou short message; s4, Beidou short message sending and cache management are carried out; s5, the receiving end gateway equipment processes the received short message; step S6, the gateway maintains the dynamically updated ARP table, and adds an MAC frame header to reconstruct a complete Ethernet frame; and S7, forwarding the completely reconstructed Ethernet frame to the target edge device. According to the invention, the problem that the IP data communication between the edge devices is interrupted under the abnormal condition of the existing network architecture is solved, and stable and efficient data transmission is realized through an innovative technical means.

The present application relates to the field of industrial communication technology, and relates to a batch information collection method, an information reporting method and an industrial control system, the method comprising: filling a business type identification value determined according to the business type of the business to be executed into a business type field in a business message to be generated; determining, according to the number of categories of business data collected from the slave station, to set N information units equal to the number of categories in the data area in the load area; filling each group of business parameters determined according to each category of business data into the corresponding information unit; encapsulating the filled information units and business type fields according to a preset Ethernet frame protocol to obtain a business message and sending it to all slave stations; receiving and parsing the response messages returned by each slave station; the response message is generated by the slave station based on the business data collected by the business type identification value and each group of business parameters; thereby solving the problems of heavy burden on the master station and low information collection efficiency in the prior art.

The application discloses a time synchronization device and communication equipment, a PTP sending module receives an Ethernet frame to output a first sending data packet start identification signal and a first sending signal; a time stamp processing module assigns a first current time stamp to a first sending time latch signal, and assigns the first sending time latch signal to a time stamp t1 register; a processor acquires the time stamp t1 to stamp a synchronization message / follow-up message, a PCS receiving module receives to output a first receiving data packet start identification signal; a PTP receiving module analyzes a delay request message to output the first receiving data packet start identification signal; the time stamp processing module assigns a second current time stamp to a first receiving time latch signal, and assigns the first receiving time latch signal to a time stamp t4 register; the processor acquires the time stamp t4 to stamp a delay response message. The application can realize high-precision time synchronization.

The present disclosure relates to an Ethernet Phy comprising an analog interface for connection to a communication medium, a digital interface, and a wake-up interface, the Ethernet Phy being configured to change from a sleep mode to an active mode or from an active mode to a sleep mode, the Ethernet Phy being configured to receive a first analog signal via the analog interface, the first analog signal representing an Ethernet frame, and the digital interface being configured to receive a second analog signal via the analog interface, the Ethernet Phy is configured to transmit an Ethernet frame via a digital interface only in an active mode and to receive a first wake-up signal representing a first wake-up identifier or a second wake-up identifier via a wake-up interface in a sleep mode, and a controller coupled to the first wake-up signal and configured to change from a sleep mode to an active mode in response to a case where the first wake-up signal represents one of the first wake-up identifier or the second wake-up identifier, and configured to remain in the sleep mode in response to a case where the first wake-up signal represents the other of the first wake-up identifier or the second wake-up identifier. The invention also relates to a method for Ethernet Phy.

The invention relates to an ad hoc network MAC layer scheduling method, belongs to the technical field of ad hoc networks, and solves the problem of low transmission efficiency of routing information exchange when the node scale is relatively large in the prior art. S1, a data packet sent by a user generates an original Ethernet frame, and the original Ethernet frame enters a data link layer; s2, packaging the original Ethernet frame into a data frame including a destination node address at a time; s3, searching an optimal next-hop wireless node from the current node to the destination node, and judging whether link switching is needed or not according to the routing information of the current wireless node to obtain an actual next-hop wireless node address; s4, performing secondary packaging on the actual next-hop wireless node address and the primary packaging data frame, and sending to the actual next-hop wireless node; and S5, analyzing the destination node address and the original Ethernet frame by the actual next-hop wireless node, taking the destination node address and the original Ethernet frame as the current node, and repeating the steps S2 to S5 until the data frame is sent to the destination node. The efficient ad hoc network MAC layer scheduling method is realized.