157 results about "Link Layer Discovery Protocol" patented technology

The invention provides a method, a system and a controlling bridge for acquiring port extension (PE) topology information, as well as a method and a system for handling an upstream port, wherein the method for acquiring the PE topology information comprises the following steps that a controlling bridge (CB) receives a link layer discovery protocol (LLDP) message sent by the PE and senses the own connection to the PE; the CB receives an extended port create message sent by the PE, and exemplifies the corresponding exemplified port in the CB. With the adoption of the technical scheme provided by the invention, the topology information of the PE connected with the CB can be effectively obtained, and a channel used for transferring data can be established.

A method is provided in one example embodiment and includes communicating a query over a network to a plurality of entities that reside in a domain, the query including a request for data relating to energy use. The query can be generated by one or more computing devices belonging to the domain. A selected one of the computing devices can control power consumption for the entities in the domain. In other embodiments, a discovery protocol (DP) and a link layer discovery protocol (LLDP) is used for transporting events regarding the entities that connect or disconnect from the network. The entities send discovery events over a DP / LLDP protocol, identifying them as part of the domain. In yet other embodiments, the method includes querying a selected one of the entities to determine, if the selected entity moved to a certain energy level, an energy consumption value at the certain energy level.

The invention discloses a port configuration method and exchange equipment, wherein the method is applied in an exchange equipment which enables IGMP Snooping, and comprises receiving neighbor information of a link layer discovery protocol LLDP transmitted by a neighbor device through a port, judging whether the neighbor device enables the IGMP Snooping or not according to the LLDP neighbor information received by the port, and doing dynamic router port configuration to the port when the neighbor device enables the IGMP Snooping. The exchange equipment can lead multicast flow to be rapidly contracted through the IGMP Snooping information of an expanded LLDP information carrying device according to an expanded LLED information dynamic configuration router port when network topology is changed, manual configuration of users is avoided under the circumstance that the port is allocated with a plurality of VLANs, and the exchange equipment is convenient to maintain.

The invention discloses a collision detection method, device and a network device of a dual-master device in a thermal staking system, and provides a dual-master device detection technology applicable to a thermal stacking system composed of a two-layer device and a three-layer device and meeting the network compatible requirement at the same time, and thus the availability of the dual-master device detection technology is improved. The method comprises the following steps: an original master device of the thermal staking system receives an LLDP (link layer discovery protocol) massage sent by an opposite end detection port through a detection port arranged in advance, wherein the LLDP massage carries a device identification of a master device of the thermal stacking system of the opposite end detection port at present; and the original master device determines whether the device identification carried in the LLDP massage received currently and the device identification carried in the LLDP massage received last time are identical, if so, the dual-master collision does not exist, and if not, the dual-master collision exists.

The invention provides a method of building a control channel, a forwarding point (FP) and a controller. The method comprises that a first FP sends the topological information of the first FP to a second FP through a link layer discovery protocol (LLDP), so that the second FP can send the topological information of the first FP to the controller through a first control channel after the second FP receives the topological information of the first FP. The first FP receives first routing information sent by the controller that the first FP reaches the controller, and the first routing information is generated by the controller according to the topological information of the first FP. The first FP builds a second control channel with the controller according to the first routing information. The first FP does not need to run an interior gateway protocol (IGP), the fact that the first FP maintaining the neighbourship of the IGP is avoided, and the first FP does not need to store the routing information of other FPs reach a virtual cluster, the storage resource of the first FP is beneficial to be saved, and the forwarding performance of the first FP is beneficial to be improved.

The invention provides a method of obtaining network connection information using a link layer finding protocol, comprising: transmitting link layer finding protocol message to other devices by a device, wherein the message is carried with local device information in the device; receiving the link layer finding protocol message from other devices by the device, resolving the link layer finding protocol message, composing a far-end network device information according to the local device information carried therein, storing the far-end network device information in the device; storing the far-end network device information stored locally into a link layer finding protocol management information base. The invention performs network information performs network information double ply through using LLDP protocol, stores neighbor network information in LLDP MIBs, used for network management software unified finding, thereby ensuring network mapping discovery between isomerization network, advancing accuracy of plotting topology by network management software.

The invention discloses a flexible, extensible and safe inter-domain topology discovery method. On the basis of the existing software definition network inter-domain topology discovery method, through improving a link layer discovery?protocol data packet, a software definition network domain is discovered to be in topology connection with the adjacent software definition network domain in a distributed?software definition network. The method disclosed by the invention is simple and safe, and can successfully solve the problem of inter-domain topology discovery among a plurality of domains in the distributed?software definition network.

The invention provides an automatic test method and a system. The method comprises the following steps: A. a link layer discovery protocol (LLDP) enabling is conducted to a tested device so that the tested device obtains and stores a link connection information according to the LLDP; B. the automatic test system accesses the tested device and obtains the stored link connection information in the tested device; C. a network topology is generated and stored according to the obtained link connection information in the tested device; D. an automatic test is carried out on the tested device according to the generated topology. According to the invention, the automatic discovery of the tested environment topology proceeds, thereby the test efficiency is improved and the test cost is saved.

The invention discloses link discovery method and device, and belongs to the technical field of network management. The link discovery method includes determining security level of a network device according to authentication TLV (type, length and value) when a first LLDP (link layer discovery protocol) message sent by a directly connected device is received by a network device; and if the security level of the network device is security, determining the device type of the directly connected device, and sending a second LLDP message to the directly connected device according to corresponding relationship between the device type of the directly connected device and the TLV. According to the link discovery method, the security level of the network device is determined, when the security level of the network device is security, the device type of the directly connected device is determined, and corresponding TLV is selected to send according to the device type of the directly connected device, so that the situation that all types of TLVs are sent to the directly connected device in the prior art is avoided, possibility of device information linkage is reduced, the sent LLDP message is more reasonable, and link cost is saved.

The invention discloses a realization method for enabling a function of a link layer discovery protocol (LLDP) on a non-Ethernet link. The realization method comprises the following steps that: global enable of an LLDP is respectively started on network equipment of a home terminal and network equipment of an opposite terminal; port enable of an LLDP is respectively started on a non-Ether interface of network equipment of the home terminal and a non-Ether interface of network equipment of the opposite terminal; when an HelloTime is reached, an LLDP Hello message is assembled on a port of the home terminal, and the message is sent to the opposite terminal; and the LLDP Hello message is received and is processed according to an LLDP protocol so as to generate and update neighboring information. According to the invention, an objective of utilizing an LLDP neighboring discovery function on a non-Ethernet link is achieved; besides, the implementation is simple and the cost is low. In addition, the invention also discloses a realization system for enabling the LLDP function on the non-Ethernet link. The system comprises a global enable open module, a port enable open module, an interface binding module, a message sending module, a message receiving module and an aging module.

Convergent network topology discovery and mapping. A topology discovery protocol allows for the discovery of the different respective communication links within a convergent network that may become composed of any of a number of different respective network types (e.g., a local area network (LAN), wireless LAN (WLAN / WiFi), a multimedia over coax alliance (MoCA) network, a HomePlug network, and a wireless point to point (P2P) system, etc.). Such a topology discovery protocol may be implemented as a Layer 2 peer-to-peer link layer discovery protocol (LLDP). Topology discovery may be limited to neighboring nodes only (e.g., reporting information corresponding only to those nodes directly connected to a given node). Any desired device within the overall convergent network may serve as a mapper operative communication device (e.g., that device which performs the mapping service such as in accordance with generating a graph corresponding to the topology indicating of connectivity among the various communication devices).

The invention provides an SDN(software defined networking)-based link aggregation method. The SDN(software defined networking)-based link aggregation method includes the following steps that: an SDN controller senses the network topology structure of an SDN, and receives link state information reported by an SDN switch; aggregation groups and member ports are calculated according to the link state information and the network topology structure; load balance is calculated, and a flow table is issued; and a first message is forwarded, so that the SDN switch can quickly forward data according to the content of the flow table. With the SDN-based link aggregation method of the invention, the network topology structure of the whole network can be obtained through the SDN controller according to the LLDP (link layer discovery protocol), and when finding that a certain message has a plurality of links with consistent attributes when the message passes through the SDN, the SDN controller selects an optimal link based on a certain strategy intelligently and forwards the optimal link, and therefore, load sharing can be realized dynamically; and the SDN controller can also select a link dynamically again and forward the link when the optimal link malfunctions.

Embodiments of the present disclosure provide systems and methods to enable a Power Source Equipment (PSE) and a Powered Device (PD) advertise their identity, capabilities, and neighbors by exchanging IEEE Standard 802.1AB Link Layer Discovery Protocol (LLDP) information in Ethernet frames. Each Ethernet frame contains one or more LLDP Data Units (LLDPDUs) corresponding to a sequence of type-length-value (TLV structure) structures. The PSEs and PDs utilize optional TLV Structures from among the one or more LLDPDUs to advertise their PoE capabilities.

The invention relates to a method for realizing link discovery and management in an FTTX (Fiber to the X) access system. The method comprises the steps of: periodically sending link layer discovery protocol messages to an uplink device of an OLT (Optical Line Terminal) device through an uplink interface by the OLT device; performing a listening task by a core swap disk program of the OLT, wherein the link layer discovery protocol messages from an ONU (Optical Network Unit) and an ONU user-side access device are received in the listening task; respectively storing locally stored information of the device and information of a user-side network device into a local link layer discovery protocol management information base by the OLT device; requiring to send LLDPDU (Link Layer Discovery Protocol Data Unit) protocol messages to the uplink device by the OLT so as to report the existence of the OLT; and carrying out extension of the LLDPDU messages. The invention fills in the gap of application of the traditional link layer discovery protocol (LLDP) and provides the method for realizing link layer discovery in the FTTX access system with optical path grading, especially on a plug-in card type OLT device; and according to the method, provided by the invention, the basic architecture of the FTTX access system is not affected, and the operation is simple and easy to realize.

A method for preventing unauthorized connection in a network system mainly includes adding an authentication key in the LLDP (link layer discovery protocol) transmitted in accordance with the 802.1ab communication protocol so as to proceed with security mechanism under the structure of 802.1ab communication protocol. The method for preventing unauthorized connection includes receiving a LLDP packet satisfying the 802.1ab communication protocol transmitted from a second network device by a first network device in a network system; analyzing the LLDP packet and checking whether the LLDP packet contains a legitimate authentication key; and if the authentication key does not exist or is illegitimate, then block all packets transmitted from the second network device so as to prevent the unauthorized second network device from using the network transmission service provided by the first network device.

The embodiment of the invention provides a network interface testing method and equipment. The network interface testing method comprises the steps that the electronic equipment acquires multiple link-layer discovery protocol (LLDP) messages sent by a switch, wherein multiple to-be-tested network interfaces of the electronic equipment are connected with ports of the switch respectively, differentto-be-tested network interfaces are connected with different ports, and each LLDP message comprises an identifier of the port sending the LLDP message; the electronic equipment determines network interface connection information according to all the LLDP message and the identifiers of the to-be-tested network interfaces receiving the LLDP messages, wherein the network interface connection information is used for indicating the connection relation of all the to-be-tested network interfaces and the ports of the switch; and the electronic equipment sends the network interface connection information to the main control equipment, and therefore the main control equipment can open or close the ports of the switch according to the network connection information to conduct performance testing on the to-be-tested network interfaces connected with the opened ports. Accordingly, manual intervention is not needed in network interface testing, testers are reduced, and the testing efficiency is improved.

The invention discloses a loop detection method and an apparatus, relating to the technology field of the communication, which solves the problems that in prior art non-standard LLDP message carrying self-defined specific protocol number conflicts with other self-defined user message. A first apparatus transmits a first link layer discovery protocol (LLDP) data unit protocol to a second apparatus. The first LDDP protocol comprises a first loop detection information including loop detection types, an apparatus identification of the first apparatus and a port number of a first port. The first apparatus acquires the second LLDP message transmitted by the second apparatus from a second port. The second LLDP message comprises the first loop detection information. The second port is the one different from the first port. The first apparatus determines the presence between the first port and the second port. The embodiment of the invention is applied in the process of the loop detection.

The application discloses a Media Access Control (MAC) address information synchronization method and device based on a Virtual eXtensible Local Area Network (VXLAN), wherein the method is applied to a VXLAN Tunnel End Point (VTEP) in the CAS CXLAN. The method includes the steps of: after any Virtual Machine (VM) is detected to be connected with the device, adding a local MAC item corresponding to MAC address information of the VM in an MAC address table; carrying the MAC address information in all of the local MAC items of the MAC address table, belonging to the same VXLAN, in a Link Layer Discovery Protocol (LLDP) message, and after the LLDP message is packaged into a VXLAN message, sending the VXLAN message to the VTEP at an opposite end through a VXLAN tunnel associated with the VXLAN; and de-packaging the VXLAN message after the VXLAN message sent by the VTEP at the opposite end is received, obtaining the LLDP message, and updating the MAC address table according to the MAC address information carried in the LLDP message.

The invention discloses a flow control method and equipment based on the link status. The method comprises the following steps that a transmitting terminal packages transmitting status of a first port in an example or a VLAN (Virtual Local Area Network) into an LLDP (Link Layer Discovery Protocol) message, and transmits the LLDP message into a receiving terminal; and the receiving terminal acquires the transmitting status of the first port from the LLDP message, and determines a flow control strategy through the transmitting status of the first port. In the invention, invalid flow in a point-to-point link can be reduced, and the invalid flow can be prevented from occupying bandwidth.

The invention discloses an information protection method and device based on a link layer discovery protocol. The information protection method includes the steps that a home terminal device organizes self-carried information to form a plurality of different TLV messages, encapsulates the TLV messages into a data unit of the link layer discovery protocol to form LLDP messages, draws out LLDPDU fields encapsulated in the LLDP messages, carries out encryption on the TLV messages in the LLDPDU fields, and sends the encrypted cryptographs to a neighbor device adjacent to the home terminal device; the neighbor device decrypts the cryptographs, and carries out further analysis on the received LLDP messages to finish information interaction. According to the information protection method and device, an encryption method for both communication parties of a LLDP protocol is introduced, the information protection method and device ensure communication safety of the LLDP protocol, enable the device for operating the LLDP protocol to be not easily influenced by hostile attacks from the Internet and other aspects, and improve the safety of protocol operation.

The invention provides a method, device and system for implementing detection on network topology fault of nodes in a network, wherein the method comprises the steps of: initiating a link layer discovery protocol, and obtaining current topological neighbor information through a topological neighbor discovery process; comparing the current topological neighbor information with pre-stored reference topological neighbor information, and giving an alarm prompt regarding topological error if the current topological neighbor information and the reference topological neighbor information are inconsistent.

The invention provides a network device configuration correcting method and a network device. The method comprises: the network device discovers a Link Layer Discovery Protocol (LLDP) message sent by a neighbor device; the network device analyzes the LLDP message to obtain the attribute information of the opposite-end interface of the neighbor device; the network device acquires the attribute information of the adjacent port of the neighbor device; the attribute information of the adjacent port is compared with the attribute information of the opposite-end interface; and if differential attribute information exists through the comparison, configuration correction is carried out on the interface corresponding to the differential attribute information according to a preset rule. By utilizing the network device configuration correcting method and network device provided by the invention, the automatic configuration correcting can be realized when the port configuration is detected to be incorrect, so that the stability and reliability of the network are improved.

Systems and methods of propagating frame loss information by a node in an Ethernet network include detecting one or more of service unaware port discards and service aware port discards; determining statistics based on the one or more of service unaware discards and service aware port discards; and transmitting the determined statistics to a sender node through one of a Link Layer Discovery Protocol Data Unit (LLDPDU) and a Link Trace Message (LTM). The LLDPDU and the LTM can include an organization specific Type-Length-Value (TLV) with a TLV information string therein based on the determined statistics and cause of the one or more of service unaware discards and service aware port discards.

The invention discloses a topology generation method of a switchboard management system, and belongs to the technical field of networks. The topology generation method comprises the following steps of: firstly, initializing, obtaining initialized information by a system, wherein the initialized information comprises management grouping, and management states, management roles, priorities, IP (Internet Protocol) addresses and MAC (Media Access Control) addresses of switchboards; then carrying out equipment recognition, equipment competition and private IP address allocation by the switchboards on the basis of an IPstack protocol; and finally, realizing link state display based on an LLDP (Link Layer Discovery Protocol). According to the topology generation method, topology generation can be rapidly completed, and the whole network link state information can be completely displayed, and the defects of long topology generation time and incapability of completely displaying the network link state information in the prior art are overcome, therefore the topology generation method is suitable for popularization and use.

The invention provides a network management device and method. The network management device comprises a simple network management protocol (SNMP) management end module, a network information managing module, a network topology managing module and a network configuration managing module, wherein the SNMP management end module is connected with an SNMP agent end module of a managed device and used for building an SNMP channel with the managed device, the network information managing module is connected with the SNMP management end module and used for obtaining a link layer discovery protocol (LLDP) neighbor table item of the managed device through the SNMP channel, the network topology managing module is connected with the network information managing module and used for obtaining topology information of a current network according to the LLDP neighbor table item of the managed device, and the network configuration managing module is respectively connected with the SNMP management end module and the network topology managing module and used for calculating and obtaining configuration information, corresponding to the managed device, in the current network according to the topology information of the current network and an obtained user command. The configuration information, corresponding to the managed device, in the current network is sent down to the corresponding managed device through the SNMP channel so that the managed device can execute configuration processing according to the corresponding configuration information.

The invention relates to a full-station communication network unified management method for an intelligent substation. The method comprises the following steps: setting a CPU port VLAN (Virtual Local Area Network) of a switch of an independent network; classifying a cascade port among the switches in the independent network into the VLAN; classifying the port of the switch connected with a webmaster switch into the VLAN; distributing a management IP to the switch in the independent network; starting up an LLDP (Link Layer Discovery Protocol) function of the switch, and implementing unified management of the communication networks of the full station. The scattered communication networks are connected through a management network, the newly added wiring networking does not affect the existing business due to the existence of the independent VLAN, and in addition, the network wiring and the operation of classifying the VLAN on the switch are not complicated and are relatively simple in project implementation.

The invention discloses a method and device for determining a network topological structure, and relates to the technical field of computers. A specific embodiment of the method comprises the steps: obtaining first data related to a link layer discovery protocol so as to determine a connection relationship between network devices; obtaining second data related to an address resolution protocol and third data related to a medium access control protocol to determine a connection relationship between the network devices and the host; and determining a network topological structure based on the connection relationship between the network devices and the connection relationship between the network devices and the host. According to the embodiment, the network topology structure can be detected in real time; the precision is high; maintenance is easy; no extra network detection message is generated; and forwarding of a machine room device to the message is not affected.

A computer network includes a server computer having communication ports that are wired to switch ports of two separate network switches. The network switches receive link layer discovery protocol (LLDP) packets from other network devices, and automatically aggregate corresponding switch ports into a port channel aggregation based on the contents of the LLDP packets.