33 results about "Bidirectional Forwarding Detection" patented technology

The invention relates to a scale out network backup path fast switching notification system and method, and aims to solve the problem that the existing VRRP / BFD protocol switching time cannot meet the high real-time requirement of an AI server scale out network. The scheme is realized through a collaborative architecture of a CPU (Central Processing Unit), an inspection FPGA (Field Programmable Gate Array) and power supply monitoring: the CPU runs a VRRP / BFD (Bidirectional Forwarding Detection) protocol stack and maintains a state table, and the FPGA is responsible for detecting a power supply fault, a port fault and GPU alarm in real time, and generating and sending a pre-installed message in one main frequency period; and the power supply monitoring module ensures that power supply is maintained for more than or equal to 5ms after sudden power failure through the energy storage capacitor, so that complete transmission of fault messages is ensured. The system has the advantages that the system supports multi-scale out interface redundancy, the end-to-end delay of fault detection and backup path switching is smaller than or equal to 1ms by adopting a low-power-consumption switching chip and independent minimum power domain design, the fault response speed and reliability of an AI server scale out network are remarkably improved, and the system is suitable for guaranteeing the network continuity of a high-density AI training cluster.

The invention discloses a cloud private line communication method, an access switch and gateway equipment, which are applied to scenes of bidirectional forwarding detection, cloud communication and the like of a cloud private line. The method comprises the following steps: an access switch receives BFD message information, wherein the BFD message information comes from a user edge router; sending the BFD message information to a first gateway device and a second gateway device, so as to establish two BFD sessions with the first gateway device and the second gateway device at the cloud private line gateway side through a user edge router, and provide a dual BFD session mechanism; when first closed state message information generated based on the dual BFD session is not received, determining that at least one cloud private line link in the first cloud private line link and the second cloud private line link is in normal communication; and instructing the user edge router to perform communication between the user edge router and the cloud private line gateway through at least one cloud private line link with normal communication, and maintaining the first BFD session and the second BFD session to ensure the stability of cloud private line communication.

Techniques are described for detecting a change in Path Maximum Transfer Unit (PMTU) in a network and initiating a PMTU discovery process. A Bidirectional Forwarding Detection (BFD) data packet is generated having enhanced headers configured to record a largest packet sent value and a largest packet received value. The BFD data packet is sent from a first network device (such as a first router) to a second network device (such as a second router). A largest packet sent value and a largest packet received value are each recorded in the BFD data packet. If the largest data packet sent value is larger than the largest data packet received value, then a determination can be made that a path change has resulted in a reduction in PMTU which has resulted in either a data packet being fragmented, a data packet being dropped or both. A PMTU discovery can then be performed.

This application provides a fault detection method, an apparatus, and a system. The method includes: A transmit end apparatus includes, when sending a border gateway protocol BGP message used for advertising a route, a bidirectional forwarding detection discriminator BFD discriminator configured by the transmit end apparatus, to trigger a receive end apparatus to automatically create an SBFD session used for detecting reachability of a target object associated with the transmit end apparatus, where the target object may be a locator address or a next-hop address of the route.

Various example embodiments of the instant disclosure generally relate relate to the field of communications, and in particular (but not exclusively), to devices, methods, apparatuses and a computer readable storage medium media for link monitoring of Internet Protocol link (s). For example, a first network device may determine to start link monitoring of an Internet Protocol link between a terminal device and a second network device based on at least one criterion being satisfied. The first network device may then transmit a first message for starting the link monitoring of the IP link to the second network device, such that a bidirectional forwarding detection session is started between the terminal device and the second network device for the link monitoring of the IP link.

The invention discloses a running state monitoring method and device, electronic equipment and a storage medium, and relates to the technical field of computers. Creating a bidirectional forwarding detection session between the first device and the second device in a bidirectional forwarding detection module according to the identified heartbeat registration information, so as to execute a heartbeat message transceiving task based on the bidirectional forwarding detection module, and synchronizing an execution result parameter of the heartbeat message transceiving task to the first software unit, the bidirectional forwarding detection module is a hardware module specially used for monitoring link and path states between devices on the devices, and the problem of state misjudgment caused by the fact that heartbeat data packets are not sent in time due to scheduling of a central processing unit can be effectively solved by unloading heartbeat detection tasks of a software unit to the bidirectional forwarding detection module for execution. The precision of the heartbeat detection result is improved, and the pressure of executing the heartbeat detection task of the software unit by the central processing unit is reduced.

A node of a network includes a network interface configured to receive outgoing bidirectional forward detection (BFD) echo packets transmitted from an originating node and to transmit return BFD echo packets with queue depth information appended thereto back to the originating node; a queue depth information generator configured to collect queue depth information; and a processor configured to append the queue depth information to the outgoing BFD echo packets. Other apparatus and methods are disclosed.

The application discloses a kind of self-adapting bidirectional forwarding detection method, belong to space communication and network technical field.This method is based on the change rule of link propagation characteristics to construct delay prediction and detection parameter adaptive adjustment mechanism: first, satellite link historical round-trip delay sequence is acquired, parameterized modeling and compression are carried out to the propagation round-trip delay in window, and light detection parameter configuration file is generated;Satellite-borne node recovers delay prediction model according to the parameter configuration file, and real-time obtains link round-trip delay prediction result, and dynamically adjusts bidirectional forwarding detection control message sending period and fault detection timeout threshold according to this;Further, the timeout determination mechanism is established by combining the delay change rule in the transmission process of control message, to reduce the influence of space link dynamic propagation delay on fault detection accuracy.

The application provides a network fault repair method and system based on multi-protocol detection, and relates to the technical field of network communication, which comprises the following steps: collecting link layer discovery protocol, address resolution protocol, routing table and bidirectional forwarding detection session state information; constructing a directed graph model comprising a plurality of nodes and links; identifying a primary path of current traffic according to the bidirectional forwarding detection session state information, and determining a fault link segment according to the primary path; generating a dynamic state identifier set according to the address resolution protocol, the routing table and the fault link segment; and generating a candidate optimized path according to the directed graph model and the dynamic state identifier set. Three key states, i.e., forwarding reachability, policy blocking and link fault, are accurately identified. The dynamic state identifier set truly reflects the actual carrying capacity of a link to service traffic, and fundamentally avoids the problem of traffic black hole after switching caused by misjudgment of routing reachability, i.e., forwarding reachability.

This application provides an adaptive bidirectional forwarding detection sending method, receiving method, and apparatus. The method includes: a first network device sending a service packet to a second network device, the service packet including an INT packet header, the INT packet header being used to carry an INT BFD control message.

A tunnel BFD session establishment method and device are provided. The tunnel BFD session establishment method includes: acquiring first content information, generating a first tunnel bidirectional forwarding detection (BFD) session establishment packet according to the first content information, and sending the first tunnel BFD session establishment packet to a second edge node; receiving a second tunnel BFD session establishment packet sent by the second edge node; and establishing a tunnel BFD session between the first edge node and the second edge node when the BFD status of the first edge node and the BFD status of the second edge node are a preset status. Therefore, the solution can solve a series of problems in the related art caused by that a tunnel BFD session can only be established by means of manual configuration, so as to achieve the effect of automatically establishing the tunnel BFD session.

The invention provides a method for determining tunnel connectivity. The method is applied to a first communication device supporting BFD (Bidirectional Forwarding Detection). The method comprises the following steps: generating and sending a first message, wherein the first message is a BFD (Bidirectional Forwarding Detection) message which is initiated by single-end equipment and is used for detecting the connectivity of a bidirectional tunnel; the first message comprises outer-layer tunnel information, inner-layer tunnel information and BFD control information. The outer-layer tunnel information indicates a first tunnel from the first communication device to the second communication device, and the inner-layer tunnel information indicates a second tunnel from the second communication device to the first communication device. The first tunnel and the second tunnel are IP tunnels. If both the first tunnel and the second tunnel have no fault, the first message is finally forwarded to the first communication device based on the outer-layer tunnel information and the inner-layer tunnel information, and correspondingly, the first communication device can determine the connectivity of the two-way tunnel. By using the scheme, even if the IP tunnel only comprises a single endpoint to support the BFD technology, the connectivity of the bidirectional tunnel can be determined.

The application discloses a fault processing method and device based on linkage of VRRP and BFD, equipment and storage medium, relates to the technical field of network communication, and comprises the following steps: when detecting that a BFD module is faulty, adjusting heartbeat messages of a VRRP module according to a preset heartbeat detection instruction to obtain target heartbeat messages; performing link detection according to the target heartbeat messages to obtain a detection result; and when the detection result is a link exception, triggering the VRRP module to perform route switching. The technical problem of how to maintain the rapid detection capability of a virtual route redundancy protocol for a link fault in the case of failure of a bidirectional forwarding detection module is solved; the linkage control hub actively takes over the link detection responsibility after the failure of the bidirectional forwarding detection module, upgrades heartbeat detection of the virtual route redundancy protocol from a basic mode to an enhanced mode, and therefore the link fault sensing capability is still maintained in the case of absence of the bidirectional forwarding detection module.

The present disclosure relates to a control method, system and interactive terminal of a bidirectional forwarding detection session, and relates to the technical field of network security. The method of the present disclosure comprises: a first interactive terminal adding a first sequence identifier and a first response identifier in a first BFD session message, wherein the first sequence identifier is a unique identifier of this message interaction, and the first response identifier is set as a value representing no response; the first interactive terminal sending the first BFD session message to a second interactive terminal; the first interactive terminal receiving a second BFD session message sent by the second interactive terminal, wherein the second BFD session message comprises a second sequence identifier and a second response identifier; and the first interactive terminal determining that the second BFD session message is a response message of the first BFD session message in the case that the second sequence identifier is the same as the first sequence identifier and the second response identifier is set as a value representing a response.

The embodiment of the invention provides a BFD (Bidirectional Forwarding Detection) processing device, a BFD processing method and related equipment. The BFD processing device comprises a configurable logic device and a storage device, the configurable logic device comprises an analysis configuration unit; the memory device includes a memory cell; the analysis configuration unit is used for executing configuration operation, and the configuration operation comprises the following steps: configuring corresponding BFD session information in the storage unit after a BFD configuration message is obtained; wherein the BFD session information comprises BFD session parameters and a BFD state machine; and the storage unit is used for storing the multiple pieces of BFD session information configured by the analysis configuration unit. Configuration logic for executing configuration operation and BFD session information are decoupled, an analysis configuration unit is arranged on a configurable logic device, the configuration operation of all BFD sessions is executed, the BFD session information does not need to be integrated on the configurable logic device, occupation of lookup table resources and trigger resources is greatly reduced, and the BFD session configuration efficiency is improved. Therefore, the routing fault detection of a large number of BFD sessions is realized.

This invention discloses a 5GC industrial private network handover latency detection method. It utilizes a dual-probe measurement mechanism by deploying a first and second probe on the N2 and N3 interfaces respectively, allowing for more precise timestamp settings on the control plane and data plane. The method also incorporates a 5G synchronization clock to calibrate the clock deviation between the two probes. Furthermore, it calculates multi-level latency by acquiring the differences in start and end timestamps of wireless transmission latency, 5GC forwarding latency, and the processing start and end timestamps of each stage of the protocol stack composed of IP, UDP, and GTP-U. This allows for accurate calculation of the network quality of the operating device, improving detection accuracy. By compiling keepalived to support bidirectional forwarding detection and coordinating with VRRP primary / backup node handover, it achieves millimeter-level fault detection, improving fault detection efficiency, shortening the network fault detection cycle, increasing response speed, and enabling millisecond-level handover, thus enhancing handover efficiency.

The embodiment of the invention provides a BFD (Bidirectional Forwarding Detection) message sending method and device, and relates to the technical field of communication. The method comprises the following steps: traversing IP addresses in a first range in an IP address field configured by network equipment according to a set period, and generating a BFD message by taking the IP address traversed each time as a source IP address; if a plurality of equivalent links exist between the network equipment and the next-hop equipment, selecting a target link from the plurality of equivalent links based on the quintuple of the BFD message generated each time, and sending the BFD message generated each time to the next-hop equipment through the target link; and if the plurality of equivalent links do not exist between the network equipment and the next-hop equipment, sending the BFD message generated each time to the next-hop equipment through the links between the network equipment and the next-hop equipment. Through the scheme provided by the embodiment of the invention, the network equipment can be prevented from mistakenly considering that the logic link is abnormal based on BFD detection, and the service stability is improved.

The application provides a kind of interruption detection method, device and equipment based on bidirectional forwarding detection (BFD) state, and relates to the technical field of network communication.The method is applied to a network device, establishes a dedicated line between the network device and other network devices, and configures a corresponding BFD session for each dedicated line.Then, a first BFD state of the BFD session at the current time point is obtained, and based on a preset time interval, a second BFD state at a first historical time point and a third BFD state at a second historical time point of the BFD session are obtained.The first historical time point and the second historical time point are time points located before the current time point, and the first historical time point is between the current time point and the second historical time point.Based on the first BFD state, the second BFD state and the third BFD state, interruption detection is performed on each dedicated line, and the dedicated line in interruption is alarmed.The method of the application improves the accuracy of interruption alarm while reducing the pressure on network operation and maintenance personnel.

The application provides a link detection method and device, and relates to the technical field of communication. The method comprises the following steps: for each private network address in an address pool used for load balancing, a bidirectional forwarding detection (BFD) packet is sent to a network device corresponding to the private network address; a response packet of each BFD packet sent by the network device is received; a state of the network device represented by each response packet received within a set time is confirmed; if the state represented by more than a first set number of response packets within the set time is an inactive state, it is confirmed that a link between a load balancing device and the network device is unavailable; and if the state represented by more than a second set number of response packets within the set time is an active state and the state represented by a third set number of recently received response packets is an active state, it is confirmed that the link between the load balancing device and the network device is available.

The application provides a traffic congestion control method, device and system, comprising: after a first device receives traffic congestion indication information sent by a second device, the first device stops sending data to the second device; the traffic congestion indication information is a priority-based traffic control (PFC) pause frame; the first device determines at least one third device which has traffic transmission with the second device; the third device is an upstream device of the first device; the first device sends a first bidirectional forwarding detection (BFD) packet to the at least one third device, the first BFD packet carries indication information used for requesting to disconnect a BFD session with the third device; after the first device receives a second BFD packet sent by the at least one third device, the first device disconnects the BFD session with the at least one third device; the second BFD packet carries indication information used for indicating that the third device agrees to disconnect the BFD session with the first device. According to the scheme, traffic congestion can be effectively controlled.

The invention discloses a BFD (Bidirectional Forwarding Detection) session maintenance method, a path connectivity detection method and a related device, and the method comprises the steps: obtaining a to-be-detected segment list which is a sequence formed by segment identifiers of a plurality of network devices in sequence; the segment identifier of each network device in the segment list is converted into a corresponding global identifier, a global identifier list consistent with the segment list path is generated, the global identifier list is used for guiding the message to sequentially pass through the specified device, and the network device is allocated with a unique global identifier before the global identifier list is generated; finally, the BFD sessions are maintained based on the global identifier lists, the same global identifier list only corresponds to one BFD session, the effect that the segment lists of the same path share one BFD session is achieved, redundancy of the BFD sessions is reduced, repeated connectivity detection does not need to be carried out on the same path in subsequent connectivity detection, consumption of equipment resources is reduced, and the efficiency is improved. And the equipment performance is improved.

The application discloses a data processing method, device and storage medium, wherein the method is applied to a DPU device, and the method comprises the following steps: through a hardware parser, it is confirmed that a received message is a bidirectional forwarding detection (BFD) message, and the BFD message is identified by bit; according to the bit identification, the BFD message is identified and sent to an open virtual switch (OVS); BFD session information sent by the OVS according to the BFD message is received, and a BFD control message sent by a network processor (NP) at a preset interval is received. Through the method, the processing delay can be reduced, and the timeliness and accuracy of fault detection can be improved.

The invention provides a multi-VRRP group and ECMP collaborative load adjustment method and system, and belongs to the technical field of network communication, and the method comprises the steps: generating a plurality of ECMP equivalent paths according to an ECMP protocol principle, creating a corresponding VRRP group for each ECMP equivalent path, establishing a mapping relation between the ECMP equivalent paths and the VRRP groups, and constructing an annular main / standby topological structure among a plurality of virtual routers; according to an extended routing protocol, realizing cross-VRRP group state synchronization, and generating a global VRRP state information table; establishing a bidirectional forwarding detection session on each ECMP equivalent path, and periodically collecting quality parameters from the global VRRP state information table; constructing a dynamic weight model, calculating and constructing the dynamic weight model based on the collected quality parameters, and obtaining and normalizing the weight value of each ECMP equivalent path; detecting service flow, identifying a DSCP field, and dividing service types; and based on the weight value and the service type of each ECMP equivalent path, establishing a differentiated flow scheduling strategy, and dynamically adjusting the ECMP equivalent paths.

The application provides a data transmission method and device, which is applied to an OTN, the OTN comprising an optical access node, a first OTN device and a second OTN device, and the optical access node is connected to an access device in an Ethernet network through the first OTN device and the second OTN device. The method comprises the following steps: obtaining bidirectional forwarding detection (BFD) state information, the BFD state information being used for indicating whether a first link and / or a second link is connected, the first link being a link between the first OTN device and the access device, and the second link being a link between the second OTN device and the access device; determining a transmission path of service data according to the BFD state information, and transmitting the service data. Through the BFD state information used for indicating whether the first link and / or the second link is connected, the transmission path of the service data between the optical access node and the access device can be determined more flexibly, so that the reliability of data transmission is improved.

The invention discloses a self-adaptive hardware BFD (Bidirectional Forwarding Detection) link detection method and a self-adaptive hardware BFD link detection system, according to the scheme, millisecond-level link state detection is realized through a special BFD processing engine integrated by a switching chip, the transceiving processing of a BFD message and the maintenance of a state machine are completely completed by hardware, and the processing delay of a CPU (Central Processing Unit) is avoided; the transmission delay of historical messages is counted in real time by adopting a sliding window in the BFD link detection process, and a fault judgment threshold value is dynamically calculated and updated based on a statistical result; when packet loss is detected but the time delay is smaller than a dynamic threshold value, the BFD message sending priority is automatically improved, and when continuous packet loss occurs and the time delay exceeds the dynamic threshold value, a standby link switching mechanism is immediately triggered, so that the problem of frequent switching of a main link and a standby link caused by network fluctuation is avoided, the accuracy and reliability of network fault detection are remarkably improved, and the service life of the main link and the standby link is prolonged. And stable operation of the key service network is ensured.

Embodiments of the present application relate to the field of communication, and disclose a seamless bidirectional forwarding detection method and system, a node and a storage medium. In the present application, the bit position of the Flags field in the SRH header of the SBFD probe packet is preset, so that the node / device receiving the target IPv6 packet in the transmission process can identify that the target IPv6 packet carries the SBFD probe packet, and then the node can modify the link addresses corresponding to each node in the transmission path recorded in the SRH header corresponding to the SBFD probe packet, so that the SBDF probe packet reaches the reflection node, and the reflection node can generate a corresponding backhaul path according to the modified transmission path, thereby realizing the consistency of the coming and going paths.

A node of a network includes a network interface configured to receive incoming bidirectional forward detection (BFD) echo packets from an originating node and to transmit return BFD echo packets with performance metrics appended thereto back to the originating node. The node also includes a performance metrics generator configured to collect the performance metrics related to at least the node and a processor configured to append the performance metrics to the outgoing BFD echo packets. Other apparatus and methods are disclosed herein.

The embodiment of the invention provides a chip implementation method, a switch chip and a switch, and relates to the technical field of chips, the method comprises the following steps: generating a first BFD (Bidirectional Forwarding Detection) message comprising an IPv6 header and a UDP header, and the IPv6 header adopts a fixed IPv6 address structure; the method comprises the following steps: obtaining a first BFD message, obtaining an initial UDP Checksum through calculation based on initial pseudo header information of the first BFD message, rewriting a fixed IPv6 address in the first BFD message into an actual IPv6 address based on message editing related information, and carrying out incremental updating on the initial UDP Checksum to obtain a second BFD message and a target UDP Checksum. And redirecting the second BFD message to a data plane forwarding pipeline, thereby optimizing the chip implementation of the BFD over SRv6.

The invention relates to a routing convergence method and device based on a bidirectional forwarding detection protocol, which are applied to network control equipment, and the network control equipment is used for managing interaction between a Decode pool and a Prefill pool under a PD separation architecture in large model reasoning. The method comprises the following steps: acquiring a network link bandwidth between a Decode pool and a Prefill pool and a KV Cache value of the Decode pool; calculating a network detection parameter according to the network link bandwidth, the KV Cache value and preset fault recovery time; the fault recovery time is less than the maximum fault recovery time allowed by the Decode pool; detecting a network link between the Decode pool and the Prefill pool according to the network detection parameters to obtain a detection result; and if the detection result shows that the network link is abnormal, link abnormity processing is carried out. According to the method provided by the invention, a traditional BGP protocol and a technology matched with the traditional BGP protocol can be adapted when the Decode pool service is adapted, and the delay is reduced.