22 results about "IP forwarding algorithm" patented technology

The invention discloses a 5G industrial gateway rapid networking method and system, and the method comprises the steps: building a routing protocol neighbor relation between an industrial gateway and a server module and a core network module, and synchronizing a link state database; and respectively executing a shortest path priority algorithm on the three nodes, and calculating respective shortest paths to other nodes according to the link state database so as to generate respective optimal IP routing tables. When the industrial gateway receives a first data packet, the industrial gateway forwards the first data packet to a core network module through a base station and a private network bearer network according to an internal optimal IP routing table and a target IP address in the first data packet; and the core network module forwards the first data packet to the data network module according to the optimal IP routing table and the target IP address in the core network module. According to the invention, link state databases of the industrial gateway, the server module and the core network module are synchronized through a routing protocol, so that each device masters the topological structure of the whole network, and dynamic addressing of the industrial network is effectively supported.

Methods and devices configure edge nodes of a virtual network overlay to continuously forward data plane traffic flows between client devices of a common subnet over the course of at least some of the edge nodes being EF-configured. TF-configured edge nodes and EF-configured edge nodes both play roles in unilaterally inducing address discovery by sending to client devices address discovery responses that were not prompted by address discovery requests. TF-configured edge nodes then handle ensuing address discovery requests by proxy, and subsequently handle certain traffic flows according to an EF-compatible forwarding mode, while EF-configured edge nodes continue to forward traffic flows by IP routing normally. This averts throughput of data plane traffic over the network overlay being reduced as a side effect of the heterogeneously configured edge nodes, and averts the possibility of client devices broadcasting address discovery protocol requests as a result of remote client devices being unreachable.

The invention discloses an survivability evaluation method, device and equipment of an SPN (Shortest Path Network) and a readable medium. Constructing an SPN network initialization model based on the actual SPN network operation state of the to-be-evaluated area, wherein the SPN network initialization model comprises network nodes corresponding to actually deployed transmission network elements and a network structure of IP routing connection relationships of the network nodes; setting node load and node capacity of each network node; setting at least one simulation attack strategy aiming at the SPN network initialization model; attacking the network nodes in the SPN network initialization model based on a simulation attack strategy, distributing the node load of the network node which fails after attack to other network nodes, and monitoring whether the redistributed network node is overloaded and fails until no new network node fails; and determining a survivability index based on the number of non-invalid nodes in the SPN network initialization model and the number of total network nodes, and performing survivability evaluation. According to the scheme of the invention, survivability evaluation for SPN network characteristics can be realized.

A method, a system, and a computer program product for data routing in communications systems. A data packet is received and an internet protocol (IP) address of the data packet is determined based on the source of the data packet. A forwarding route for transmission of the data packet is determined. The forwarding route is selected from a specific IP route for a content offload network interface or a default route for a mobile network operator packet data network gateway. The data packet is transmitted based on the determined forwarding route.

The invention discloses a fast routing design method supporting longest mask matching, and belongs to the technical field of digital information transmission, the method comprises the following steps: generating a hash table of a routing table according to a hash function rule, and recording all existing mask values; when the IP address is searched, deriving all mask IPs containing the same IP field according to all the existing mask values; mapping the IP address and the mask IP through a hash function at the same time to obtain a corresponding hash address; and taking the Hash address as a matching domain, carrying out IP matching on the mask IP according to a length descending order, and outputting a matching result when the matching is successful. While the longest mask matching is realized, the method does not depend on TCAM (Ternary Content Addressable Memory) and SRAM (Static Random Access Memory), and the high-speed lookup performance required by fast routing is met.

The application provides a traffic forwarding method and device based on MLAG dual-homing access EVPN, which comprises the following steps: in the case of main link failure, based on the target ESI corresponding to the main link, determining a first MAC / IP route associated with the target ESI, the route attribute of the first MAC / IP route being a preset attribute value, and the preset attribute value representing that the route has a proxy attribute; configuring the egress of target traffic to point to a second PE; the main link is a link between a target CE and a first PE, the backup link is a link between the target CE and the second PE, and the route attribute of the first MAC / IP route is configured by the second PE through the way of adding a BGP extended community attribute. Through the way of adding the BGP extended community attribute, the dual-homing PE can form a protection group for the MAC / IP route associated with the same ESI on the access side and the tunnel side, and can prevent traffic packet loss in the case of main link failure.

This invention provides a control channel multiplexing and docking method, apparatus, computer equipment, and medium based on a high-speed network, comprising: configuring a logical channel connected to the control system for each test site and dynamically setting IP routing mapping relationships; converting analog feedback signals output by sensors at the first test site into digital feedback signals, encapsulating them, and transmitting them to the test control room via a high-speed real-time network; receiving a first data packet, decapsulating it, converting it into an analog feedback signal, and inputting it to the control system; converting analog control commands issued by the control system into digital control commands, encapsulating them, and transmitting them to the first test site via a high-speed real-time network; decapsulating a second data packet according to its destination IP address, converting it into an analog control command, and outputting it to the actuator; updating the IP routing mapping relationship and switching the logical channel connection when switching test sites. This enables the hardware resources of a control system to be reused.

A UMR auto-discovery mechanism which allows a gateway EVPN router to advertise a UMR route and to suppress redistribution of remote domain MAC-IP routes. In one embodiment, upon joining a local EVPN domain of a network, a network device (an EVPN router) advertises its UMR capability, which may include UMR installer capability or UMR originator capability. The UMR-capable devices in the network are also advertised to the newly added network device. A UMR originator (e.g., gateway) with knowledge of the UMR capabilities of the devices in the network then generates and sends a route list to the devices, where the route list includes a UMR route, or MAC / IP routes, or both, depending upon whether all of the network devices are all UMR-capable, none are UMR-capable, or the devices include both UMR-capable and non-UMR-capable devices, respectively.

The present disclosure provides dynamic routing for data flows to a customer network hosted in the cloud. A plurality of compute instances may share a common virtual IP address. Each of the plurality of compute instances may advertise information to a respective network virtualization device (NVD). The information may include the IP address, cost, and / or active / standby status of the compute instance. The NVD may then provide the information to the control plane of a virtual cloud network (VCN), which may aggregate the information from the plurality of compute instances and generate a forwarding table, which may be sent to the NVDs. These techniques may allow a customer to automatically remove a compute instance whose service host has failed. These techniques may also allow a customer to add compute instances and to route data flows according to an active-standby operation, an equal cost active-active operation, or an unequal cost active-active operation.

The present application discloses a business data access method, apparatus, device, and computer storage medium, which relate to the field of security management technology and are used to improve the reliability of network access on the basis of ensuring the security of business data access. The method comprises: receiving business access configuration information sent by a security management server; when it is determined based on interception mode indication information that only business access requests for controlled business sites are intercepted, the controlled IP address information of the controlled business site is determined based on the identification information of the controlled business site; based on the obtained controlled IP address information, a corresponding IP routing rule is generated; for business access requests that comply with the IP routing rule, the business access request is intercepted by an access proxy component, and when it is determined that the business access request complies with the zero-trust access policy, the business access request is sent to the target business site through a zero-trust gateway.

In order to perform appropriate IP routing in consideration of information about a transmission layer when a failure has occurred in a network, this network control device controls: a transmission network that is configured from a plurality of transmission devices; and an IP network that connects a plurality of routers by using the transmission network. The network control device comprises: a failure determination unit that determines a failure location on the basis of failure information on the plurality of transmission devices and failure information on the plurality of routers; a transmission path determination unit that determines whether or not switching of a transmission path is necessary for the failure location, and, when the switching of the transmission path is necessary, determines a route for the transmission path after the switching; a transmission device control unit that switches the transmission path for the transmission devices on the basis of the determination result of the transmission path determination unit; an IP routing determination unit that determines whether or not switching of an IP routing is necessary for the failure location and, when the switching of the IP routing is necessary, determines the priority of the IP routing after the switching; and a router control unit that sets the priority of the IP routing for the routers on the basis of the determination result of the IP routing determination unit.

The invention discloses a satellite telemetry data processing device based on an IPv6 protocol. The satellite telemetry data processing device comprises an AOS / IP conversion module, an IP routing forwarding module and an IP / AOS conversion module. According to the telemetering processing device, telemetering data AOS frames input by all channels are converted into IP packets through the AOS / IP conversion module, routing output of the telemetering data IP packets is achieved through the IP routing forwarding module, and finally the IP packets routed to the corresponding responder channels are converted into AOS telemetering data frames to be output through the IP / AOS conversion module. According to the telemetry data scheduling realized in the mode, the processing time of software is greatly reduced, the scheduling of the telemetry data is completed by the on-satellite routing processing unit, the IP packet in the downlink telemetry data AOS frame is of a standard structure, the interconnection and intercommunication with the ground IP Internet are easy to realize, and the distribution and analysis of the ground telemetry data are convenient.

The application discloses a kind of spaceborne high-speed hybrid hash routing lookup method and system.For improving routing lookup efficiency, pre-processing is set in the front end of core routing lookup module, and multi-channel IP message data stream arbitration is combined into two ways, routing lookup is carried out simultaneously in two ways, and finally the result of routing lookup is distributed to corresponding channel;Secondly, the hybrid hash routing lookup mode of routing lookup process is combined with segmented parallel lookup, multiple hash bucket parallel lookup and multiple hash algorithm lookup, and each result is filtered and output according to table item priority after obtaining the query result.The application combines the characteristics of hash table lookup time complexity O (1), has good query performance, effectively reduces the probability of hash conflict, greatly improves the probability of successful storage of hash table item on the basis of saving hardware storage resources, greatly improves the query accuracy, and solves the demand of high-speed IP routing lookup on satellite product.

The embodiment of the invention provides a route synchronization method and device, electronic equipment and a storage medium, and relates to the technical field of communication. The route synchronization method comprises the following steps: based on the validity of a plurality of gateway stations at the current time and the feeder link connectivity of each gateway station, determining available gateway stations which are valid and have connected feeder links; selecting a first affiliation gateway station of the broadband satellite terminal from the available gateway stations, wherein the first affiliation gateway station is kept unchanged when the broadband satellite terminal is subjected to cross-satellite switching; and issuing the IP route of the user network connected with the broadband satellite terminal to the first home gateway station, so that the first home gateway station sends the IP route of the user network to the ground-based bearer network. According to the routing synchronization method and device, the electronic equipment and the storage medium provided by the embodiment of the invention, the influence of cross-satellite switching of the broadband satellite terminal on routing convergence of the ground-based bearer network is reduced, and the influence on user services is reduced.

Techniques for Internet last mile outage detection are disclosed. The techniques include methods for: monitoring, by a network device associated with a network, a plurality of network nodes; detecting, by the network device, that a network node among the plurality of network nodes has become disconnected from the network in the last mile of the network; overlaying, by the network device, the network node onto a network model for at least a portion of the network including the network node to generate a model overlay; and determining, by the network device, a last mile outage source associated with the disconnection of the network node by identifying a lowest common ancestor node of the network node from the model overlay. Systems and computer-readable media are also provided.

The invention relates to a method for determining at least one alternative path for routing at least one data stream within an autonomous system implementing an IP routing protocol, in the event of saturation, or risk of saturation, of at least one link of a plurality of target links present on at least one path between an entry point and an exit point of the autonomous system. Such a method comprises: - a reinforcement-learning training phase (11), in which at least one agent (AG) is trained to determine at least one path for routing the at least one data stream within the autonomous system, on the basis of at least one exchange of data between the at least one agent (AG) and a reinforcement-learning environment (ENV), as a function of at least one datum representative of the saturation or risk of saturation; - an inference phase (12), in which the at least one trained agent is used to deliver the at least one alternative path.

Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for IP routing and forwarding operation and management of an IP router node. A core network entity obtains a first set of IP routing or forwarding information about at least one IP interface in a first IP router node from at least one of the following: at least one user plane entity in the first IP router node, at least one control plane entity in the first IP router node, or an IP router controller. In turn, the core network entity determines a second set of IP routing or forwarding information about the first IP router based on at least one of the first set of IP routing or forwarding information and first static routing information preconfigured on the core network entity, the at least one IP interface connecting the first IP router node to a second set of IP entities and / or to a third set of IP entities. Each of the IP entities comprises an IP node or an IP host.

This application provides a communication method and apparatus. The method is applied to a first PE, which is located within an EVPN network. The EVPN network also includes a second PE. The CE establishes connections with the first PE and the second PE through different links, respectively. The first PE and the second PE form a multi-homed group. The method includes: when the second PE fails, obtaining an ESI from the EAD per ES route sent by the second PE, wherein the ESI is an identifier of the same ES associated with the first PE and the second PE; obtaining a MAC-IP route sent by the second PE including the ESI based on the ESI; obtaining a first MAC entry generated corresponding to the MAC-IP route based on the MAC-IP route; and converting the first MAC entry into a second MAC entry.

Methods and devices configure edge nodes of a virtual network overlay to continuously forward data plane traffic flows between client devices of a common subnet over the course of at least some of the edge nodes being EF-configured. TF-configured edge nodes and EF-configured edge nodes both play roles in unilaterally inducing address discovery by sending to client devices address discovery responses that were not prompted by address discovery requests. TF-configured edge nodes then handle ensuing address discovery requests by proxy, and subsequently handle certain traffic flows according to an EF-compatible forwarding mode, while EF-configured edge nodes continue to forward traffic flows by IP routing normally. This averts throughput of data plane traffic over the network overlay being reduced as a side effect of the heterogeneously configured edge nodes, and averts the possibility of client devices broadcasting address discovery protocol requests as a result of remote client devices being unreachable.

A wireless transmit / receive unit (WTRU)-to-WTRU relay (Relay1) may be configured to receive a first message from a source WTRU (WTRU1), store a route entry to WTRU1 in a unicast routing table, send a second message to a second WTRU-to-WTRU relay (Relay2), receive a third message from Relay2, store a route entry to WTRU2 in the unicast routing table, store an association of a user information identification (ID) of WTRU2 and the IP address of WTRU2, store an IP route entry to WTRU2 in a unicast IP routing table, send a fourth message to WTRU1, store an association of a user information ID of WTRU1 and the IP address of WTRU1, store an IP route entry to WTRU1 in the unicast IP routing table, and send a fifth message to WTRU2 via Relay2.

A routing information management method adapted for a layer-3 switch is proposed. For each ARP entry in an ARP table, a processor assigns to the ARP entry an aging reference parameter that is identical to a quantity of those routing entries in an IP routing table whose next hop IP addresses are identical to the IP address of the ARP entry, and removes those ARP entries whose aging reference parameters are zero. For each routing entry in the IP routing table, when the next hop IP address of the routing entry is absent from the ARP table, the processor makes the routing entry serve as an inactive routing entry, proactively sends an ARP request for the inactive routing entry, and updates the ARP table based on a piece of ARP information received externally.

A route advertisement method includes advertising, by a first network device, an Internet Protocol (IP) prefix route to a second network device, where the IP Prefix route includes a gateway (GW) IP address and a Multi-Protocol Label Switching (MPLS) label. The GW IP address is an IP address of a first interface of the first network device. The MPLS Label is a label of a first IP-virtual routing and forwarding (IP-VRF) instance of the first network device. The first network device advertises a media access control (MAC) / IP route to the second network device, where the MAC / IP route includes the IP address of the first interface and a MAC address of the first interface.