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7343541 |
Data integrity in protocol offloading
A method for data verification is provided. An input block of data is received together with a modulo-based input error detection code associated with the input block, the input block comprising a...
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7333426 |
Redundant inverse multiplexing over ATM (IMA)
The present invention provides redundant, inverse multiplexing over ATM (R-IMA). An ATM control system may include line interface circuitry, transmission convergence logic, IMA logic, and a...
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7327671 |
Method and system for controlling communication network and router used in the network
The present invention provides a communication network comprising a host network, a plurality of base stations, at least a mobile host capable of establishing links to the base stations, and a...
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7324439 |
Application-transparent IP redundancy
The present invention is directed to a method, a service node and a system for providing IP redundancy between a first service node and a second service node being mutually redundant. The first and...
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7313089 |
Method and apparatus for switching between active and standby switch fabrics with no loss of data
A switching system for a data traffic network. A plurality of line cards provide input and output connections to a plurality of data lines and further are connected to at least two switch fabrics,...
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7307947 |
Protection system, layer 2 function block, node and ring network enabling wideband transmission of working traffic and protection of protection channel traffic
A ring network having a plurality of nodes connected by a working channel and a protection channel. When no failure exists, the working channel and the protection channel are link-aggregated into...
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7298693 |
Reverse notification tree for data networks
Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to upstream switching...
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7298753 |
Technique for managing heavy signaling traffic that is directed to a particular signaling control unit
A method is described that involves sending a positive imposter response as a consequence of a status request message having been received. The status request message refers to a network...
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7289433 |
Method and system for providing robust connections in networking applications
A method for preventing information losses due to network node failure is disclosed. The method comprises the steps of operatively connecting at least one backup node to a primary node, followed by...
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7289487 |
Apparatus for redundancy of voice processing unit in media gateway system, and method thereof
A media gateway system and a method of substituting one unit for another in the system. The system uses cross point switches that are controlled by a main control unit. When a voice processing unit...
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7289434 |
Method for verifying function of redundant standby packet forwarder
In one embodiment, an intermediate node includes one or more active forwarding planes and one or more redundant forwarding planes. The intermediate node may also include one or more active control...
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7286468 |
Routing system and method for synchronizing a routing system with peers after failover
A routing system provides for transparent routing system failover by checkpointing route prefixes during normal operation by maintaining a route prefix table. After failure of a primary routing...
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7283465 |
Hierarchical virtual private LAN service protection scheme
A data communication network includes a plurality of primary virtual bridges, interconnected by primary virtual connections so as to transmit and receive data packets over the network to and from...
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7280472 |
Protection switching at a network node
Protection switching between primary and secondary paths in a packet-based network involves table entries that are pre-programmed with a primary path, a secondary path, and a value that identifies...
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7277383 |
Redundancy mechanization protocol for a massively parallel router
A parallel router comprising: 1) a plurality of routing nodes, each of the plurality of routing nodes capable of receiving message packets from and transmitting message packets to external devices,...
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7269132 |
Method and apparatus for achieving transparent redundancy at a hierarchical boundary
Transparent redundancy may be achieved at a MPLS-MPLS hierarchical boundary or a BMA-MPLS hierarchical boundary by utilizing local repair mechanisms extant in each domain to select automatically...
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7269133 |
IS-IS high availability design
The HA IS-IS system provides a redundant backup IS-IS protocol instance that can seamlessly assume the function of the active IS-IS instance in the event of active MCP failure. Once the backup is...
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7260058 |
Timer based system for preventing mismatch in automatic protection switching
A method for resolving primary section mismatch at a local node coupled to a remote node with two working sections is disclosed. A first working section is initially identified as the primary...
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7254111 |
Routing coordination protocol for a massively parallel router architecture
A parallel router comprising: 1) a plurality of routing nodes, each of the plurality of routing nodes capable of receiving message packets from and transmitting message packets to external devices,...
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7251214 |
System and method for providing protection of data communications in packet-based networks
A method and system for providing protection of data communications in packet-based networks is provided, using a combination of unicast to multicast conversion and providing formation of virtual...
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7242860 |
Optical protection switching using 2 by 2 switching functions
A network is protected against interruption of service while one or more faulty switches or optical fiber transmission lines are repaired or replaced, by an interconnecting configuration of small...
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7236453 |
High available method for border gateway protocol version 4
High availability BGP4 is based on redundant hardware as well as redundant software that replicates the RUN state of BGP4. There are two copies, respectively active and backup, of BGP4 running on...
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7227838 |
Enhanced internal router redundancy
Disclosed are methods and apparatus for providing redundant data forwarding or routing capabilities. In one embodiment, a network device includes a designated router and a non-designated router....
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7209435 |
System and method for providing network route redundancy across Layer 2 devices
Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is...
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7194653 |
Network router failover mechanism
A method, system, apparatus, and signal-bearing media for determining connectivity information for routers running on servers that are attached to a device. A router is resigned in favor of a...
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7184394 |
Routing system providing continuity of service for the interfaces associated with neighboring networks
A router includes at least two router modules, one of which is in an active state at any given time, the others being in a standby state, and a changeover capability making it possible to cause one...
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7177268 |
Packet distributing device
Packets of different priorities are efficiently distributed to a plurality of links of different qualities. When transmitting a low priority packet, the load on a higher quality link is examined,...
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7177269 |
Router providing continuity of service of the state machines associated with the neighboring routers
A router made up firstly of at least two router modules, only one of which is in an active state at any given time, and secondly of a changeover device making it possible to cause one of the other...
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7167479 |
Multi-chassis broadcast router having a common clock
Supportably mounted by each chassis of a multi-chassis broadcast router are primary router matrix cards, redundant router matrix cards and clock-demanding input and output cards. A first master...
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7158791 |
Route updating method for micromobility network
The invention provides a route updating method which reduces the flow rate of updating notifications, which are circulated in a network, to improve the scalability. A micromobility network includes...
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7133357 |
Cell switch module with unit cell switching function
A cell switch module having a unit cell switching function and placeable in either an active state or a standby state. The module comprises a plurality of input ports for inputting cells thereto, a...
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7120112 |
Redundancy in media stream processing
Various media stream processing systems and methods are provided. In one exemplary embodiment, a media stream processing method is provided that includes the brokering of a number of communications...
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7116634 |
TCP sequence number recovery in a redundant forwarding system
Disclosed are methods and apparatus for facilitating recovery of a data connection that was established between an active router and a host. The data connection is a type of connection that tracks...
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7110353 |
Distributed digital cross-connect system and method
A distributed digital cross-connect system ( 10 ) is provided. The system includes two or more network interface islands ( 12 ) that connect to the telecommunications network. The system ( 10 )...
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7110354 |
Method of controlling 1+1bi-directional switching operation of asynchronous transfer mode switch
A system and method of controlling a bi-directional switching operation for a synchronous transfer mode (STM- 1 ) signal transmission line of an asynchronous transfer mode (ATM) switch is...
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7103274 |
Cross-connect apparatus
An apparatus having n-number of working cross-connects for cross-connecting an n-bit input signals arriving from a plurality of input paths on a per-bit basis; n-number of first logic circuits for...
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7099578 |
1:N protection in an optical terminal
A communication network includes first and second terminals, nodes, and links. The first node is coupled to the first terminal through the first link, and coupled to the second terminal through the...
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7095713 |
Network fabric access device with multiple system side interfaces
A fabric access device having a plurality of system interfaces is disclosed. The fabric access device includes a fabric interface configured to receive data from and send data to a switch fabric...
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7093160 |
Method and system for implementing MPLS redundancy
The present invention relates to a method and system for implementing protocol redundancy in a router. In particular, the invention relates to providing redundancy of multi protocol label switching...
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7085226 |
Control apparatus and method for relay node duplexing
The present invention relates to a message transmission system, and more particularly, to a control apparatus and method for relay node duplexing. In the invention, when the exchange of the active...
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7082130 |
System and method for point-to-point protocol device redundancey
A system and methods are shown for providing packet data serving node (PDSN) redundancy. One exemplary method includes providing an access node with a plurality of packet data serving nodes and at...
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7065037 |
Method and apparatus to provide facility and module redundancy in telecommunication switching equipment
A cross point switch is configured to select from one of a first stream of ATM cells and a second stream of ATM cells, the first stream and the second stream being identical, and is further...
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7065038 |
Automatic protection switching line card redundancy within an intermediate network node
An apparatus and technique configures an intermediate network node, such as an aggregation router, to implement automatic protection switching (APS) redundancy among its line cards in the event of...
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7061942 |
Apparatus for redundant multiplexing and remultiplexing of program streams and best effort data
A redundant remultiplexer includes two media control modules, wherein, if the primary module operates in an input mode, the backup module performs the same processing of packets as the primary...
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7061858 |
High availability architecture for network devices
A method and apparatus allows for continued operation of one or more applications running at a network device with reduced delay despite crashes or failures at that device. The network device...
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7058013 |
Header conversion technique in ATM switch
A header conversion device allowing reduced amount of hardware and memory and high-speed line switching is disclosed. In an ATM switching device having redundant incoming line systems, a header...
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7058011 |
N to one and one to one equipment protection switching
A method and apparatus for effecting 1:1 or N:1 equipment protection switching in the line units of a voice-and-data access and transport network includes three sets of switches associated with the...
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7054263 |
Synchronous change of switchplane
A change of switch plane operation is performed in a multi-plane cell switching node ( 20 ) which has a first switch plane ( 22 ); a second switch plane ( 24 ); and plural switch port interface...
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7031319 |
ATM switching system
An ATM switching system 10 includes an EMA 20 and CPUs 30 and 40 as currently acting and subsidiary systems, respectively. The CPUs 30 and 40 are connected via connecting lines 50 a ...
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7023795 |
Method and apparatus for an active standby control system on a network
A method and apparatus for providing an active standby control system comprising the steps of providing a first programmable logic controller and a second programmable logic controller, each...
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