135 results about "LAN switching" patented technology

A process of controlling a flow of data in a wireless network providing wireless access to the wireless network by wireless devices is disclosed. Data is received from a wireless device by a network device, through one access point of a plurality of access points in communication with the network device, indicating a client identifier for the wireless device. The client identifier is forwarded to an authentication server and the network device mediated authentication of the wireless device with the authentication server. Thereafter, data packets received from portions of the wireless network and from the plurality of access points are evaluated and the received data packets are passed to portions of the wireless network and to the plurality of access points, based on the evaluation of the received data packets. In addition, the network device periodically polls for a status of the wireless device from the access point.

In a LAN switch capable of recognizing a VLAN, a plurality of paths are associated with a VLAN having a plurality of same members as components, and frames from the members are mapped to a predetermined path selected from among the paths. Also, a plurality of different VLAN's are associated with a single group composed of a plurality of members, and frames from the members are mapped to a predetermined VLAN selected from among the VLAN's. Furthermore, information of a frame is associated with the group to which a member having transmitted the frame belongs, and the received frame is mapped to the group to which the member having transmitted the frame belongs, based on the information of the frame.

A LAN switch is one component of a communications network system composed of a virtual LAN having network terminals such as personal computers connected with ports respectively. The LAN switch provides a host table for holding correspondence between each port and address information of the network terminal connected to each port and an authentication table for holding information for authenticating a user of each network terminal. If a request takes place of changing the correspondence about the source network terminal held in the host table when relaying the packets, the LAN switch prompts a user name and a password for the source network terminal, does user authentication on the basis of the information held in an authentication table, and enables rewrite of the host table and relay of the packets if the user is correct. These processes are executed for easily preventing false use of an address or tapping or false access by a malignant user as well as analyzing or recovering the erroneously set address.

A cut through is provided in a combined router / switch in a data processing system network by having the router store and forward a first portion of a data flow from a source to a destination. The router determines whether the data flow is suitable for cut through. If found suitable, the router sends a redirect protocol to the source, directing the source to use a different destination address for all or part of the remainder of the data flow. The portion of the data flow having new destination address is then cut through the combined router / switch by the switch. If the cut through has a failure, responsibility for the data flow delivery returns to the router. If the destination of a cut through data flow is unavailable, the frames are stored by the switch and forwarded when the destination is available.

A method and apparatus for authorizing multicast group membership based on network policies, such as machine and user identities. An end station communicates with a LAN switch over a LAN link. The LAN switch inhibits the end station from joining any multicast group before the end station or a user on the end station becomes authenticated. Once the end station or a user on the end station becomes authenticated, the LAN switch authorizes the end station to join one or more multicast groups in conformance with a multicast group authorization specified for the end station or the user. The LAN switch enforces the multicast group authorization attendant to “snooping” of IGMP membership reports received from the end station or processing of CGMP join messages received from a router.

An authentication VLAN management apparatus acquires from the standard LAN switch a MAC address or an IP address of a terminal connected to a standard LAN switch, and authenticates the terminal based on the acquired MAC address or IP address. Based on the above authentication result, the authentication VLAN management apparatus assigns a predetermined VLAN to the terminal, and sets the standard LAN switch so that the terminal can access to the assigned VLAN.

When are multiplexed to a line for connecting a router and a LAN switch, another VLAN is set between the router and the LAN switch. The router receives affiliation requests containing the identifiers of desired groups from a client terminal belonging to VLAN and a client terminal belonging to VLAN. The router outputs a multicast frame of the group received from a distributing server is output through the logical interface corresponding to VLAN to the LAN switch. The LAN switch copies and transmits the received multicast frame to the client terminals.

One or more LAN switches capable of accessing the contents of a MAC address table, which the LAN switch contains, from the outside; and a presence server storing in a storage device a first correspondence table between a MAC address of a network interface, which equipment contains, and its user, and a second correspondence table between a port of the above-described LAN switch, and a physical range wired therefrom, are used to thereby obtain a correspondence table between the equipment, its user, and its physical location (range), whereby making applicable also to a wired LAN at the time of determining the location of the equipment or the location of a user using the equipment in a building, and making realizable at low cost, and allowing the location to be determined accurately within a predetermined segmented area, and not being affected even if an IP address is changed.

The invention relates to a two-way ranging and time comparison processing terminal which is characterized in that: the processing terminal comprises a frequency benchmark, a radio frequency front end, a noise source, a frequency synthesis, a transmitting channel, a receiving channel, a medium frequency signal processor, a machine case, a display and control system, a power source distributor and a LAN switching module, wherein the configuration of the entire processing terminal is a 4U machine case postnotal plate joint interconnecting structure fastened by a standard machine cabinet; the frequency benchmark, the transmitting channel, the receiving channel, the medium frequency signal processor and the power source distributor are arranged inside a standard 4U machine case; the display and control system, which is realized through the configuration of an external notebook computer and display and control software, is in interaction with the outside through the LAN switching module. The entire processing terminal has simple equipment and high integration level; communication, ranging and time comparison are completed inside a unified channel, thereby saving frequency band resource; a pseudo code ranging system is adopted to ensure high ranging precision; moreover, the processing terminal, which has the functions of simulating dynamic state and time delay inside the transmitting channel, is used to realize the quantitative detection of the performance of a receiving terminal.

Methods, systems, and apparatuses for an automatically configured network switch are provided. The network switch includes a plurality of ports, a switch fabric, switch control logic, and a switch configuration module. The ports are configured to be coupled to a plurality of network communication links. The switch fabric is coupled to each of the ports, providing interconnections between the ports. The switch control logic is coupled to the switch fabric to provide data path selection and arbitration. The switch configuration module is configured to generate a request for switch configuration information to be transmitted from one or more ports of the switch, over the network, to a switch management server. The switch control logic is configured to configure one or more features of the network switch to operate according to the received configuration information.

In one embodiment, a device with a wireless transceiver and a network interface, such as a wireless location determination device or a laptop with wireless capability and an Ethernet port, is coupled to a network switch port via the network interface. A request for location data is sent via the wireless transceiver, and location data is provided to the wireless transceiver, enabling the location of the Ethernet outlet to which the switch port is connected to be determined.

Systems and methods accessing remote digital data over a wide area network (WAN) are disclosed. In an embodiment, a network device is disclosed. The network device includes a local area network (LAN) switching fabric physical interface configured to communicate according to a LAN switching fabric protocol, a WAN physical interface configured to communicate according to a WAN protocol, and a fabric extension function configured to map LAN switching fabric interfaces to pseudo-ports, map pseudo-ports to WAN interfaces, and transmit LAN fabric datagrams received at the LAN switching fabric physical interface from the WAN physical interface via a mapped pseudo-port and a corresponding WAN interface.

Disclosed in the invention is an automatic ground testing system of spaceborne electronic equipment. The invention aims at providing an automatic ground testing system having advantages of high integration, reliability, and extensibility, high comprehensive degree, and good capability of reduction of equipment and interfaces. According to the technical scheme, tested equipment, an integrated exciter, and a response analyzer are connected by testing switch matrix equipment; and one end surface of the testing switch matrix equipment faces the integrated exciter or the response analyzer and the other end surface faces the tested equipment. Loading and measurement of different parameters are carried out by switching connectors at different positions of the testing switch matrix equipment. A main control computer carries out data interaction with the integrated exciter, the response analyzer, the testing switch matrix equipment, integrated power supply equipment, and an integrated monitor by a fiber LAN switched network; analysis and testing data are outputted in a report mode; and instructions and remote telemetering information of the integrated monitor, an integrated channel unit, an integrated service unit, and an integrated management and control unit are transmitted by the fiber LAN switched network.

An Ethernet network device includes a port logic module that is associated with a device port of the Ethernet network device. A packet processing module includes an ingress processing module that receives an incoming packet and that generates a control traffic tag. An ingress command execution module receives the incoming packet and the control traffic tag, generates a duplicate packet that is identical to the incoming packet, and generates a device interface code that identifies the port logic module based on the control traffic tag. A control traffic routing module receives the duplicate packet and the device interface code and forwards the duplicate packet to the port logic module. A network traffic analysis device receives the duplicate packet. The port logic module replaces a first destination header of the duplicate packet with a second destination header that is identical to a destination header of the incoming packet.

In one embodiment, a device with a wireless transceiver and a network interface, such as a wireless location determination device or a laptop with wireless capability and an Ethernet port, is coupled to a network switch port via the network interface. A request for location data is sent via the wireless transceiver, and location data is provided to the wireless transceiver, enabling the location of the Ethernet outlet to which the switch port is connected to be determined.

One embodiment disclosed relates to a method of fault recovery by a switch in a local area network. A link failure is detected at a port of the switch. In response to the link failure detection, a medium access control (MAC) address table of the switch is cleared. Clearing the address table causes a discovery process to fill the table to begin immediately. In addition, a link on another port of the switch may be dropped to propagate the link failure.

The invention disclose a method and a device for detecting leakage of a fluid conveying pipeline based on wavelet and mode identification, belonging to the technical field of fault diagnosis. The detection device comprise pressure transmitters, an ARM processor, a local area network and a GRS global positioning timing system; two ends of the fluid conveying pipeline comprise a head station and a tail station and are provided with the pressure transmitters which are connected with the ARM processor; the GPS and the ARM processor are connected; and the head station and the station exchange real-time data through the high speed local area network. The detection method comprises the following steps of: collecting pressure data of the two ends of the pipeline; sending the data to the ARM processor; confirming the position of a leakage point; if the leakage point does not locate on the two ends of the pipeline, then carrying out a judgment by utilizing a neural network module; and if the leakage exists, then generating an alarm. The invention can effectively decrease false alarm rate, reduce false judgments and omitted judgments; and through judging on a suspected leakage curve, manually increasing a target vector database, and perfecting an expert database, the invention is beneficial to improving analysis and perceptivity of operators on a leakage curve.

The present invention includes a system and method for using Local Area Network (LAN) switch information of an internet protocol phone to determine the location of the internet protocol phone. The internet protocol phone communicates with a server and receives a dynamic internet protocol address. The internet protocol phone further communicates with a second server to receive LAN switch information for the internet protocol phone. The internet protocol phone transmits the dynamic internet protocol address and LAN switch information to a phone management module. The phone management module queries a LAN switch in order to gather further LAN switch information for the internet protocol phone. The phone management module transmits the dynamic internet protocol address and LAN switch information to a third party in order to more accurately determine the location of a user using the internet protocol phone.

The invention discloses a 5T comprehensive detection system and a detection method and belongs to the field of China railway. The 5T comprehensive detection system comprises a starting magnetic steel,5T integrated detection equipment, a LAN switch, a 5T comprehensive treatment integrated platform, an access terminal and a remote data terminal; five detection units of mechanical detection equipment, acoustic detection equipment, temperature detection equipment, image detection equipment and wheel pair dimension detection equipment are mounted on the 5T integrated detection equipment in sequence in an integrated manner according to a vehicle coming direction; collected data are transmitted to the shared 5T comprehensive treatment integrated platform to perform upgrading and degrading processing on a vehicle fault so as to obtain a vehicle comprehensive alarm value; and meanwhile, history data stored in the remote data terminal are obtained; and states of a vehicle and a part are furtherjudged for a monitoring watcher to judge the states of the vehicle and the corresponding part. According to the 5T comprehensive detection system and the detection method, the building cost and maintenance cost are reduced, and the fault prediction accuracy rate is increased.

The invention discloses a method for accessing a wireless local area network, which comprises the steps as follows: an access point (AP) to be accessed into the wireless local area network sends the communication identification thereof in an external network at a media access control (MAC) layer; according to the communication identification sent by the AP, a subscriber station is communicated with the AP by taking the currently belonged center node as an intermediate station, and exchanges and accesses signaling relative to the wireless local area network; and the subscriber station and the AP exchange information in the wireless local area network, thereby realizing the wireless local area network accessing. The invention further discloses a communication system. Through the invention, the authentication is not required before the subscriber station is accessed into the AP of a new wireless local area network, the access time delay is saved, and the rapid access is realized.

A method for switching virtual local network with multi-layer includes setting up virtual local network VLAN switching path table having VLAN data participated switch under all switch domains, obtaining the corresponding switch domain identification as per VLAN switching path table, selecting outlet path of input data packet according to said identification and destination MAC address of input data packet and using said outlet path to retransmit the input data packet.

The invention discloses a test system and a test method of UE (User Experience) moving between communities and relates to the wireless communication field. In the test system of the UE moving between the communities, a base station is connected with at least two remote radio units and connected with a core network through a local area network switch which is connected with a management station of the base station as well; the at least two remote radio units are respectively connected with at least two fixing attenuators which are connected with a power divider; the power divider is connected with the UE; the base station is used for establishing at least two communities, one community of the at least two communities serves as a service community of the UE, and the rest communities serve as neighboring communities; and the management station of the base station is used for dynamically adjusting community reference signal power of the service community or the neighboring communities to trigger the UE to perform reselection or switch between the communities. The test system and the test method of the UE moving between the communities have the advantage of reducing the test complexity and the test costs.

The invention provides a real-time data transmission method based on a local area network, comprising a real-time data user terminal, a wireless accessing point, a local area network switchboard and a real-time data transmission managing center. The real-time data transmission method can provide real-time data transmission which has fast connection speed, strong instantaneity and priority grade and has absolute enforced preferential communication for a real-time data user terminal on the basis of a network system of the existing local area network and under the condition of keeping the existing data accessing and transmission functions of the local area network; and the real-time data transmission method has general calling, group calling, announcing and urgent inserting functions and can meet the requirements of the real-time data user terminal on the transmission of voice data, video data and real-time control data.

A LAN switch has a backplane matrix in which each controller has a dedicated packet bus for propagating packet data. Each bus has a root interfacing with the transmitting (root) controller and a plurality of leaves interfacing with receiving (leaf) controllers. This configuration enables each controller to simultaneously transmit packet data on the root of a bus and receive packet data off a plurality of leaves of other buses without contention. An efficient filtering and stalling system employed at the receive side of the backplane prevents the highly parallel traffic from causing receive side congestion.

The invention discloses a local area network website security architecture system, which comprises a router, a local network area firewall, a demilitarized zone (DMZ), a department subnet zone and a virtual local area network (VLAN) privacy zone, wherein the DMZ comprises a local area network core switch, a local area network switch, a server and a VLAN zone switch; each of the department subnet zone and the VLAN privacy zone comprises at least one computer; the server is connected with a local area network sequentially by the local area network core switch, the local area network firewall and the router; the department subnet zone is connected with the local area network core switch by the local area network switch; and the VLAN privacy zone is connected with the server by the VLAN zone switch. The local area network website security architecture system has the advantages of physically disconnecting the zones of the local area network from the privacy zone in the local area network without influencing the server access, maintenance and data updating of the VLAN zone of a research and development department as well as the website access of a small number of staff of other departments in the local area network, and simultaneously ensuring the security of websites in the local area network.