133 results about "LAN switching" patented technology

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.

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.

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.

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.

A centralized managing method for the exchange equipment of local area network uses the exchange equipment to broadcast the requesting registration message including the position identification of the exchange equipment to the port of connecting managing equipment first. The registration operation is carried on after the managing equipment receives the message and sends the registration response message back. The handshaking message is sent to the managing equipment in the fixed time after the message of successful registration is received by the exchange equipment, and the managing equipmentsends the handshaking message back so that the handshaking operation of the two are finished. The registration course should be restarted if the handshaking message is not received by the exchange equipment for a certain time.

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.

A shared I/O subsystem for a plurality of computer systems. The shared I/O subsystem includes a plurality of physical I/O interfaces and a plurality of virtual I/O interfaces where each of the computer systems is communicatively coupled to one or more of the virtual I/O interfaces. The shared I/O subsystem also includes a forwarding function having a forwarding table that logically arranges the shared I/O subsystem into one or more logical LAN switches. Each of the logical LAN switches communicatively couples one or more of the virtual I/O interfaces to at least one of the physical I/O interfaces. For each of the logical LAN switches, the forwarding function receives a data packet from any one from the group of the physical I/O interfaces and the virtual I/O interfaces, and directs the data packet to at least one from the group of the physical I/O interfaces and the virtual I/O interfaces. Two or more of the physical I/O interfaces may be aggregated to form a logical I/O interface by selectively altering entries in the forwarding table without reconfiguring the computer systems.

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 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 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.

The invention discloses a seismic data monitoring system, which comprises a seismic data site collection and storage device, a local area network switch and a seismic data monitoring device, wherein the seismic data monitoring device comprises a seismic data reading module, a seismic data calculation module, a seismic data analysis module and a monitoring result generation module, the seismic data reading module is used for reading monitoring data of each construction shot in a multithreading way, the seismic data calculation module is used for generating the seismic data calculation result according to the monitoring data and a preset monitoring data calculation module, the seismic data analysis module is used for analyzing the seismic collection mass sensitive parameters and attributes according to the seismic data calculation result and the preset target layer construction requirement information, and then generating the seismic data analysis results, and the monitoring result generation module is used for generating the seismic data monitoring results according to the seismic data analysis result and the pre-obtained standard shot data. The system has the advantages that the real-time analysis and evaluation on the seismic data of a plurality of working sites can be carried out at the aspects of single shot energy, signal-noise ratio, resolution, self-correlation analysis, abnormal channels, spectrum analysis and the like, the collecting quality is ensured, and the exploration cost is saved.