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7613107 |
Protection switch logging methods and systems
Methods and systems of logging detected protection system related events affecting a protection system are disclosed. A determination is made as to whether a detected event itself or in combination...
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7610405 |
Router software upgrade employing redundant processors
Systems and methods for replacing software controlling active routers while minimizing impact on network operation are provided by virtue of one embodiment of the present invention. The software...
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7606153 |
Storage system and information processing system
Prior to alteration of the communication route connecting the enterprise servers 5 1 to 5 3 , ports a, b and c of the enterprise server 5 1 are each connected with port 1 of the storage...
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7603423 |
Communication system with primary device and standby device to prevent suspension of service of the system
When a mail server 31 and a mail server 32 are in a failover state, switches 21, 22 select communication paths E, F. A temporary save server 50 stores email received from a mail reception...
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7602706 |
Inter-ring protection for shared packet rings
A method for providing inter-ring protection in shared packet rings includes identifying an active node which is connected to a ring interconnect node on the same ring as the active node and...
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7593319 |
LAN switch with rapid fault recovery
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...
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7580348 |
Communication apparatus, control method, and computer readable information recording medium
In order to rapidly restoration at a time of fault occurrence without lowering usage efficiency of circuit resources, in a configuration in which a plurality of physical circuits are grouped and...
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7577090 |
Method and system for providing availability and reliability for a telecommunication network entity
Geographical redundancy and an efficient switchover process to redundant equipment ( 210 ) is achieved by separating active main equipment ( 220 ) and standby redundant equipment in different...
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7573813 |
Method for configuring and routing data within a wireless multihop network and a wireless network for implementing the same
A method routes packets in a wireless network which includes a control node and a multiplicity of individual nodes. The method includes: inserting a routing logical address into each packet which...
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7573812 |
Passive virtual router redundancy prototcol
The present invention relates to a pair of routers which implement an active VRRP group and one or more passive VRRP groups wherein the active VRRP group executes the VRRP election protocol and the...
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7573811 |
Network transparent OSPF-TE failover
A method and apparatus for providing link state routing protocol redundancy in a router. A router includes an active controller and at least one standby controller. An internal adjacency...
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7570583 |
Extending SONET/SDH automatic protection switching
The invention provides a method and system for coupling a SONET/SDH network to a routing network that does not have a single point of failure. Multiple routers are coupled between the SONET/SDH...
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7567505 |
VRRP technology keeping VR confidentiality
In a packet transmission router used in a VRRP (Virtual Router Redundancy Protocol) network having a VR (Virtual Router) function, when virtual routers VR are realized by the VRRP, the routing...
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7558849 |
Hardware management module
A hardware management module is enabled to perform hardware management for a modular platform system that includes a plurality of modular platform shelves coupled via one or more communication...
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7554903 |
Method and system for router redundancy in a wide area network
A method for selecting an active router in a communication device includes providing multiple routers in the device, coupling the routers to a single physical link, monitoring a status for each of...
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7551635 |
SONET method and system having network service access point addressing
A synchronous optical network (SONET) system having multi-hierarchal network service access point (NSAP) addressing includes electrically linked network elements (NEs) and first and second level...
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7551551 |
Fast reroute (FRR) protection at the edge of a RFC 2547 network
A fast reroute (FRR) technique that may be deployed at the edge of a network having first and second edge devices coupled to a neighboring routing domain. If the first edge device detects a node or...
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7535828 |
Algorithm for backup PE selection
A fast reroute (FRR) technique is implemented at the edge of a computer network. If an edge device detects a node or link failure that prevents it from communicating with a neighboring routing...
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7535827 |
High availability of resources in telecommunications network using synchronized redundancy mechanism
Redundancy mechanisms are difficult to implement in a node holding connections spanning over a wide telecommunications network. Novel redundancy mechanisms to be implemented on a telecommunications...
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7525904 |
Redundant packet routing and switching device and method
A router and method therefore for routing and switching a packet from an incoming link to an outgoing link. The router may include a plurality of network processing units, a plurality of switching...
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7518989 |
Method and apparatus for recovery from faults in a loop network
A method and apparatus for recovery from faults in a loop network ( 500 ) is provided. The loop network ( 500 ) has a plurality of ports ( 520, 530, 532, 534 ) serially connected with means for...
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7515530 |
Detecting loops between network devices by monitoring MAC moves
A technique for detecting a loop between network devices such as customer and carrier edge devices involves counting the number of media access control (MAC) address moves that occur at a device...
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7496030 |
Managing loops between network devices by monitoring MAC moves
A technique for managing loops between network devices such as customer and carrier edge devices involves monitoring the MAC moves that occur at a device to detect the existence of a loop and...
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7486611 |
Standby router protocol using optimal route metric
Redundant gateway methods, apparatus and systems use more than one gateway device in a gateway device group for communications directed outside of a LAN. Failover services in the event that an...
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7483370 |
Methods and systems for hitless switch management module failover and upgrade
Methods and systems for hitless switch management module failover and upgrade are disclosed. According to one method, a master switch management module participates in network protocols and...
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7483369 |
Method and apparatus for migrating to an alternate call controller
The present invention is directed to the maintenance of call signaling information in connection with realtime communications established using a packet data network. According to the present...
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7468949 |
Method and device for medium-redundant operation of a terminal in a network
The invention relates to a method and device for medium-redundant operation of a terminal in a network. The device comprises: a first transmission device ( 6 ) of a physical bit transmission plane...
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7467078 |
Portable distributed application framework
A portable distributed application framework that uses a definition file describing a structure of data and commands to be used by the framework to interface with an application. A proxy,...
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7461290 |
Dynamic mirroring of a network connection
Methods and systems are directed to dynamically mirroring a connection between network devices. Mirroring is managed by forwarding a packet between a first network device and a second network...
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7457235 |
High resiliency network infrastructure
A resilient interface architecture may include at least two interface switches and at least two interface routers. The at least two interface switches may provide connectivity between a subnetwork...
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7457233 |
Method and apparatus for fast reroute in a connection-oriented network
A method and an apparatus for rapidly resuming, at times of failures, network traffic in a connection-oriented network by using an alternative route pre-computed and stored locally in nodes along...
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7440395 |
Telecommunication switch and operating method
A telecommunication switch and an operating method for handling SDH signals transmitted by a protection SDH link associated to a working SDH link of an SDH hardware interface of the...
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7436763 |
Data communication apparatus with a dual mode protection switching system
A data communication apparatus having a plurality of working ports for exchanging data traffic with a network element and at least one protection port. The communication apparatus also has a...
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7433362 |
System and method for SONET NSAP addressing
A synchronous optical network (SONET) system having multi-hierarchal network service access point (NSAP) addressing includes a plurality of network elements (NEs) electrically linked, and a first...
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7426179 |
Method and apparatus for signaling path restoration information in a mesh network
A method and apparatus are disclosed for monitoring and signaling a path restoration using pre-computed restoration paths following a detected fault on a primary service path in a communications...
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7411925 |
Network route processor using state-based switchover
Embodiments of the present invention provide for switchover from an active processor to a standby processor in a route processor system. An up-to-date copy of information used by a supervisor...
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7403474 |
Redundant router set up
Methods, systems, and devices are provided for redundant router set up. One embodiment of a network device having router functionality includes a processor, memory in communication with the...
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7400575 |
Method, system and service for achieving synchronous communication responsive to dynamic status
A method for routing a communication connection request includes the steps of obtaining context information from a communication connection requester in response to a communication connection...
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7397760 |
Transmission apparatus
A transmission apparatus including: a plurality of asynchronous network interface units each having an asynchronous network termination unit for inputting/outputting a packet from/to an...
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7391719 |
Redundant network interface for ethernet devices
A redundant network interface for ethernet devices is disclosed. The redundant network interface provides connections between one or more Ethernet devices and two or more independent networks. The...
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7382724 |
Automatic switchover mechanism in a network device
A system comprises a plurality of processing modules, one of which is designated to be the primary processing module and the others are designated to be secondary processing modules. During...
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7382722 |
Architecture for a hybrid STM/ATM add-drop multiplexer
A network element including an active/standby pair of line units, an active/standby pair of switch fabric units, at least one service unit, and a management and control unit. Each line unit...
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7382720 |
Active/standby switching system and active/standby switching method
An active/standby switching system includes two AAL 2 (ATM Adaptation Layer Type 2 ) cell assembling/disassembling processor units ( 20, 30 ) as an active system and a standby system so that...
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7366413 |
Modular cross connect system with 3D-MEMS for optical telecommunication networks
A modular cross connect system for optical telecommunication networks has the optical unit divided in at least two main bodies with one section for connection comprising the collimators and a main...
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7362700 |
Methods and systems for hitless restart of layer 3 packet forwarding
A method for hitless restart of layer 3 packet forwarding includes replicating some but not all state information from a master management service module to a slave management service module. The...
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7359317 |
Redundancy arrangement for telecommunications switch
A system and method are disclosed for providing redundancy for telecommunication switches. A primary telecom switch has an active processing board and a passive I/O board for communicating with...
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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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7342875 |
Space-time coded OFDM system for MMDS applications
A communications system includes a base station that is configured to transmit a signal that is modulated according to a predetermined modulation scheme and an orthogonal frequency division...
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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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