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Patent

Network tap for use with multiple attached devices

TL;DR: In this article, the authors proposed a network tap for enabling attached devices such as an intrusion detection system to transmit information into a communication line of the network without disrupting the network traffic on the communication line.
Abstract: A network tap for enabling attached devices, such as an intrusion detection system, to transmit information into a communication line of the network without disrupting the network traffic on the communication line. When the attached device is an intrusion detection device, the network tap is connected to a firewall. An Ethernet switch or field programmable gate array (FPGA) is incorporated in the network tap to coordinate the transmission of device data to avoid data collisions with data transmissions already existing in the communication line. The network tap may be operated in various modes to accommodate different capabilities of attached devices. In addition, the network tap has various port configurations to allow a user to connect various attached devices through a single cable or dual cables and to connect various combinations of attached devices.
Citations
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Patent
17 Jul 2013
TL;DR: In this article, a high-speed tap arrangement for data transmission between a primary data path and a bypass data path is described. But the switching is accomplished rapidly using set of powered analog switches and a relay to minimize packets loss in the event of power loss.
Abstract: Methods and arrangements are provided for minimizing delay in a high-speed tap arrangement are disclosed and include hardware and software arrangements and methods for quickly switching the transmission path for data between a primary data path and a bypass data path. The switching is accomplished rapidly using set of powered analog switches and a relay to minimize packets loss in the event of power loss. Further, when power is restored, software and hardware methods and arrangements disclosed herein permit the data path to be promptly restored resulting in the restoration of tapping ability quickly after power is restored.

8 citations

Patent
23 Jun 2016
TL;DR: In this paper, a Verfahren und eine Vorrichtung zum ruckwirkungsfreien Erfassen von Daten von mindestens einer Einrichtszwerk (16.1, 16.2, 17.3) entsprechend einem Anfrageprofil (17, 17'), anzufordern, eine Mithoreinheit (21), die innerhalb des ersten Netzwerks (12) angeordnet and derart ausge
Abstract: Ein Verfahren sowie eine Vorrichtung zum ruckwirkungsfreien Erfassen von Daten von mindestens einer Einrichtung (16.1, 16.2, 16.3), die in einem ersten Netzwerk (12) mit hoher Sicherheitsanforderung angeordnet ist, in einem zweiten Netzwerk (11) mit geringer Sicherheitsanforderung, enthaltend – eine Anfrageeinheit (14), die innerhalb des ersten Netzwerks (12) angeordnet und derart ausgebildet ist Daten bei der mindestens einen Einrichtung (16.1, 16.2, 16.3) entsprechend einem Anfrageprofil (17, 17'), anzufordern, – eine Mithoreinheit (21), die innerhalb des ersten Netzwerks (12) angeordnet ist und derart ausgebildet ist, Daten, die von der mindestens einen Einrichtung (16.1, 16.2, 16.3) auf die Anforderung gesendet wurden, mitzuhoren und an einer Auswerteeinheit (13) zu ubermitteln, – eine Auswerteeinheit (13), die in dem zweiten Netzwerk (11) angeordnet und derart ausgebildet ist, die mitgehorten Daten mit dem gemas dem Anfrageprofil (17, 17') erwarteten Daten zu vergleichen, und – Alarmeinheit (24), die derart ausgebildet ist, ein Alarmsignal bereitzustellen, wenn die mitgehorten Daten von den gemas dem Anfrageprofil (17, 17') erwarteten Daten abweichen.

7 citations

Patent
13 Mar 2014
TL;DR: In this paper, a switch controller is configured to concatenate the buffers of at least an input port and an output port selected from among the multiple ports for buffering traffic of a long-haul link.
Abstract: A switching apparatus includes multiple ports, each including a respective buffer, and a switch controller. The switch controller is configured to concatenate the buffers of at least an input port and an output port selected from among the multiple ports for buffering traffic of a long-haul link, which is connected to the input port and whose delay exceeds buffering capacity of the buffer of the input port alone, and to carry out end-to-end flow control for the long haul link between the output port and the input port.

7 citations

Patent
25 Feb 2011
TL;DR: A gigabits zero-delay arrangement for continuous monitoring of data traversing through a network in a high-speed Ethernet environment is provided in this article, which includes a high speed network device configured for monitoring the data flowing through the network.
Abstract: A gigabits zero-delay arrangement for enabling continuous monitoring of data traversing through a network in a high-speed Ethernet environment is provided. The arrangement includes a high-speed network device configured for monitoring the data flowing through the network. The arrangement also includes a primary power source for providing a first power to circuitry of the gigabits zero-delay arrangement. The arrangement further includes a sensor controller configured for monitoring power flowing into the high-speed network device and for establishing an alternative communication link.

7 citations

Patent
25 Feb 2011
TL;DR: In this paper, a dual bypass module for managing an integrated secured network environment is provided, which includes network ports that receive and transmit data traffic flowing through the network, as well as a set of monitoring ports that is configured for transmitting the data traffic between the dual bypass and monitoring systems.
Abstract: A dual bypass module for managing an integrated secured network environment is provided. The module includes network ports that receive and transmit data traffic flowing through the network. The module also includes a set of monitoring ports that is configured for transmitting the data traffic between the dual bypass module and a set of monitoring systems. The module further includes a set of relays configured for controlling the flow of data through the dual bypass module. The module yet also includes a configurable integrated circuit. The configurable integrated circuit includes at least one of a first logic arrangement for determining conditions of the set of monitoring systems, a second logic arrangement for redirecting the data traffic through a secured alternate path when a monitoring system is unavailable, and a third logic arrangement for redirecting the data traffic through a secured alternate path when a communication path becomes unavailable.

7 citations

References
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Patent
11 Mar 1991
TL;DR: In this article, a network switching system consisting of a first port coupled to a source, a second port coupled with a destination, and multiplexer means coupled to the first port and the second port for transferring data is described.
Abstract: A network switching system is described. The network switching system comprises a first port coupled to a source, a second port coupled to a destination, and multiplexer means coupled to the first port and the second port for transferring data between the first port and the second port by selectively connecting the first port with the second port. The data is transferred from the source to the destination through the first port, the multiplexer means, and the second port. The network switching system further includes processing means coupled to the multiplexer means for assisting transmission of the data by receiving the data from the first port when the first port does not indicate a port for the destination. A method of transferring data from a source to a destination via a network switching system is also described.

272 citations

Patent
24 Feb 1997
TL;DR: In this paper, a bi-directional network medium monitor including a tap apparatus connected inserted in a network media, including a transceiver and a clock recovery element for each medium and medium monitor connection, is presented.
Abstract: A bi-directional network medium monitor including a tap apparatus connected inserted in a network media, e.g. Fiber Optic (FX) and Twisted Pair (TX), comprising a transceiver and a clock recovery element for each medium and medium monitor connection, and a bi-directional serial data multiplexer which directs the medium data while in the serial data format. Also, the medium monitor may interrupt medium data transfer in either medium direction and insert its data for diagnostic or other network purposes. Thus, the apparatus according to the present invention is operable to monitor a network at the maximum data rates currently used while providing no significantly network data delay.

246 citations

Patent
25 Jul 1994
TL;DR: In this paper, an ATM switch is used to combine blocks of data from multiple data servers into a single continuous data stream, which is especially well adapted for use in a video-on-demand environment.
Abstract: An ATM switch is used to combine blocks of data from multiple data servers into a single continuous data stream. The ATM switch is especially well adapted for use in a video-on-demand environment. Blocks of data may be striped across the data servers so that they are output from respective data servers in sequence. Transmission of data from the data servers to the ATM switch is scheduled so that the blocks of data are output in sequence without undue delay between the transmission of blocks of data from the servers. Synchronizing tokens are provided to the data servers to specify that they are to output data of a given sequence and to direct the sequence to a given virtual channel. As a result, the system of this invention appears to output single continuous data streams from the output ports of the ATM switch.

97 citations

Patent
08 Mar 1995
TL;DR: In this paper, a line interface is provided for performing a switching process of a fixed length cell consisting of data and a cell header, where individual units are individually connected to the plurality of lines accommodated therein and individually process the cells.
Abstract: Switching equipment in provided for performing a switching process of a fixed length cell consisting of data and a cell header. A line interface provided in the switching equipment accommodates a plurality of lines and, at the same time, processes the data from each line on a cell unit. The line interface includes individual units and a common unit. The individual units are individually connected to the plurality of lines accommodated therein and individually process the cells. The common unit is connected to the individual units and, at the same time, effects batch-processing of the cells processed by the individual units.

52 citations

Patent
29 Jan 1997
TL;DR: In this article, a method and apparatus for monitoring data sent between a source node and destination node in a switched network is presented, wherein the switches configure themselves to establish a connection path to a probe switch to receive the monitored data.
Abstract: A method and apparatus for monitoring data sent between a source node and destination node in a switched network, wherein the switches configure themselves to establish a connection path to a probe switch to receive the monitored data. The source and destination are identified along with the probe switch. An originating switch on a path between the source and destination is identified and connections between the originating switch and the probe switch are established. The originating switch sends out a first message and when the probe switch receives the first message, it returns a second message to the originating switch. Each switch between the originating switch and the probe switch that receives the first and second messages configures itself to establish the connection path.

50 citations