| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 370220000 | Standby switch | 57 |
| 20080259787 | BACKUP CELL CONTROLLER - A wireless local area network for data communications between a computer and mobile units is provided with at least two cell controllers connected to the computer and one or more rf ports each connected to a primary interface of one cell controller and to a backup interface of another cell controller. A control program in the cell controller monitors data communications between the other cell controller and the rf port by a backup interface. The program is arranged to cause the second cell controller to assume primary communications functions for the rf port in the event primary communications functions between a first cell controller and the rf port are inoperative. | 10-23-2008 |
| 20080285438 | METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR PROVIDING FAULT-TOLERANT SERVICE INTERACTION AND MEDIATION FUNCTION IN A COMMUNICATIONS NETWORK - Methods, systems, and computer program products for providing fault-tolerant service interaction and mediation function in a communications network are disclosed. According to one aspect, the subject matter described herein includes a method for providing fault-tolerant service interaction and mediation capability. The method includes providing an active instance of a service capability interaction manager (SCIM) function for providing service interaction and mediation between entities that request network services and entities that provide network services in a communications network. The method also includes providing a standby instance of the SCIM function. The active instance of the SCIM function performs service interaction and mediation between the entities that request network services and the entities that provide network services. In response to failure of the active SCIM function, the standby instance of the SCIM function takes over the service interaction and mediation previously performed by the active instance of the SCIM function. | 11-20-2008 |
| 20090003196 | WIRELESS COMMUNICATION DEVICE INCLUDING A STANDBY RADIO - A wireless communication device includes more than one radio. A lossless switching module allows for selectively using one of the radios in a standby mode. The switching module allows for switching in the standby radio in the event that another radio fails without introducing any loss. In disclosed examples, switching module inputs coupled with inactive or failed radio output ports are coupled to an impedance corresponding to the associated radio. Disclosed examples are also useful for combining the outputs of more than one radio under selected circumstances. | 01-01-2009 |
| 20090109842 | Device Manager Having Authoritative Process Relations For Conforming State Data Upon Failover - A device has first and second instances of a computer-executable manager. When a failure is detected in the first instance while it is active, the second instance is activated. During activation of the second instance, a conforming first process of the second instance conforms its state data to an authoritative second process of the second instance. | 04-30-2009 |
| 20090154342 | SYSTEMS AND METHODS FOR REDUNDANT SWITCH FABRIC AND SWITCH CONTROLLER - The present invention combines switching and control functions on a single module while avoiding requirements to synchronize working and standby switch configuration information. The present invention eliminates the idea of redundant working and standby control/switching modules and instead, distributes the switching/control functions across two (primary and secondary) modules, where in the nominal (not failed) case the primary module contains the active control component and the secondary module contains the active switching component. In the failed case, both the switching and control functions reside on one module. | 06-18-2009 |
| 20090161534 | Network relay apparatus - A network relay apparatus receives sub data different from main data by data transmission/reception processing units of a working system and a spare system, and when communication paths of the working system and the spare system are both working normally, makes the sub data flow through the communication path of the spare system. When a failure occurs in the communication path of the working system, the network relay apparatus switches the communication path for the main data to the spare system, and accordingly notifies it to a data relay unit, which is a relay destination of the main data. In the data relay unit, based on a notified content, corresponding relationships of ports in the unit are changed so that the received main data is output from the same output port as before. | 06-25-2009 |
| 20090268608 | METHOD AND DEVICE FOR AUTOMATICALLY CONFIGURING A VIRTUAL SWITCHING SYSTEM - The invention relates to a plurality of common switching systems which are interconnected in order to form a virtual switching system. The number of the internal switching system is entered into the numbering of the port of the virtual switching system thus making a standardised user interface of the switching system become available. The port can be managed by a user in a traditional manner. The virtual switching system can be automatically configured due to said type of configuration when a central entity for developing the internal routing on the partial system is introduced, and then, optional geographical redundancy of the virtual switching system is possible. | 10-29-2009 |
| 20090316572 | METHOD AND SYSTEM FOR MANAGING PORT STATUSES OF A NETWORK DEVICE AND RELAY DEVICE - A method, a system for managing port status of a network device, and a relay device are provided in the field of network management. The method includes the following steps. A relay device detects working status of ports in a logic group, and the ports are mounted on the relay device and connected to an upstream/downstream device. When it is detected that the working status of a port in the logic group is Down, the relay device sets the working status of the other ports in the logic group as Down, so that the upstream/downstream device of the relay device switches a terminal service to a standby link according to the ports' Down status in the logic group being detected. The relay device includes a detecting module and a setting module. The system includes a relay device and an upstream/downstream device of the relay device. The technical solution provided in the embodiments of the present disclosure guarantees that the terminal service is transmitted uninterruptedly. | 12-24-2009 |
| 20100046365 | MULTIPLE-PROTECTION SYSTEM AND CONTROL METHOD IN A COMMUNICATION DEVICE - A multiple-protection system in a communication device, includes: a plurality of working units; at least one protection unit; and a unit controller controlling unit switching from a failed working unit to a protection unit, wherein each of the plurality of working units and the protection unit comprises: a plurality of working circuit modules; at least one protection circuit module; and a module controller controlling module switching from a failed working circuit module to a protection circuit module, wherein, when module protection cannot be made by the module switching, the unit switching is performed. | 02-25-2010 |
| 20100097927 | METHOD AND APPARATUS FOR AUTOMATING THE DETECTION AND CLEARANCE OF CONGESTION IN A COMMUNICATION NETWORK - A method and apparatus for enabling a network to determine the call volume rate versus the call blocking rate on a predefined time interval basis over multiple predefined time intervals are disclosed. For example, if call blocking rates do not show a progressive trend of decline as call volume rates decline over multiple predefined time intervals, an alarm can be generated and corrective actions to flush out congested signaling message queues can be initiated to return the network to normal operating conditions. | 04-22-2010 |
| 20100202285 | METHOD AND SYSTEM OF RESTORING FLOW OF TRAFFIC THROUGH NETWORKS - An algorithm is presented, which may be used to generate LSPs for path-oriented virtual circuit networks. The algorithm maximizes throughput of traffic-flow through the network according to certain constraints which may selected to suit various scenarios and recovery schemes. The algorithm may be used by network operators to maximize financial profit from existing networks which has a predetermined bandwidth capacity. | 08-12-2010 |
| 20100226244 | Network System - Provided is a multicast path management method for a connectionless communication. Also provided is a path protection function which is effective when a path has failed. A network is formed by a trunk and a branch path. The multicast path is managed by end-to-end and when a failure has occurred, an instruction is issued from the apex of the multicast tree to respective end-to-end paths so as to switch from the currently used channel to a backup path. Thus, upon failure, an individual path protection can be performed without affecting other parts of the tree to which the same multicast flow as the defective path is distributed or the distribution state of the multicast flow. | 09-09-2010 |
| 20100232287 | METHOD AND NETWORK DEVICE FOR REALIZING SHARED MESH PROTECTION - A method and a network device for realizing shared mesh protection are provided. The method includes the following steps. If a status change of a working label switching path (LSP) is detected, routing information and bandwidth information about the working LSP are notified to every node on a protection LSP corresponding to the working LSP. Every node on the protection LSP calculates a maximal reserved bandwidth of a link based on the received routing information and bandwidth information and adjusts a shared protection bandwidth of the link according to the maximal reserved bandwidth. | 09-16-2010 |
| 20100246383 | Motherboard with backup network circuit - A motherboard includes at least one backup network circuit except for a network circuit used in a normal setup. The motherboard includes a first network circuit, a second network circuit, a network port, a switch circuit and a driver. The switch circuit is configured for coupling the first network circuit or the second network circuit to the network port. The driver is configured for switching the switch circuit according to states of the network port and the first network circuit. | 09-30-2010 |
| 20110096659 | Zero Packet Loss Energy Efficient Ethernet Link Transition Via Driver Fast Failover - A mechanism for zero packet loss with energy efficient Ethernet link transition via driver fast failover is provided. By default, the mechanism uses a primary adapter running at low speed with low energy usage and a secondary adapter that is disabled. This default configuration is used during periods of low link utilization. When system or input/output load is such that high speed is required, then the mechanism enables the secondary adapter to its highest supported link speed. All transmit traffic in progress running over the primary adapter will complete, and upon completion, the driver generates an address resolution request and sends the request over the secondary adapter. After this process completes, the primary adapter transitions to link down and zero packet loss transition completes. | 04-28-2011 |
| 20110164495 | BRIDGING INFRASTRUCTURE FOR MESSAGE FLOWS - A system, method and program product for proving a bridging infrastructure for handing failover situations using complimentary appliances. Each appliance includes: a first primary gateway configured for communicating a first message flow; a standby gateway configured for communicating a second message flow, wherein the standby gateway is placed in a standby mode during normal operations; and a controller service that monitors a complimentary appliance having a second primary gateway for communicating the second message flow, wherein upon a detected failure of the complimentary appliance, the controller service causes the second message flow to be redirected through the standby gateway. | 07-07-2011 |
| 20110216646 | RESIDENTIAL GATEWAY FOR PROVIDING BACKUP INTERFACE TO EXTERNAL NETWORK - The invention relates to a residential gateway for providing an end user of a network terminal in a residential network with access to an external network, said residential gateway comprising at least one network terminal interface arranged to provide an internal connection to said network terminal and an external network interface arranged to provide a first external connection to said external network. The residential gateway is characterized in that it comprises a secondary external network interface arranged to establish a second external connection with a mobile radio communications network in order to provide a backup access path to said external network, and a control unit arranged to activate said secondary external network interface, if not already activated, in response to detecting a loss of network connectivity over said first external connection, and forward data traffic between said residential network and said external network through said activated secondary external network interface. The invention also relates to a method for use in a residential gateway and a computer programme product. | 09-08-2011 |
| 20120039165 | Network Interface - A network interface includes a first port configured for communicatively coupling to a first interface for selectively passing communication signals between the first interface and a processor communicatively coupled to the network interface; a second port configured for communicatively coupling to a second interface for selectively passing communication signals between the second interface and the processor; and a controller configured to, independently of the processor, switch communications from between the first interface and the processor to between the second interface and the processor in response to detecting a failure of communications through the first port. | 02-16-2012 |
| 20120082026 | APPARATUS AND METHOD FOR PROTECTION SWITCHING FOR MESH TOPOLOGY - Provided are a shared mesh protection switching apparatus and method. The shared mesh protection switching apparatus includes a plurality of linear protection switching processors allocated to the linear protection domains respectively and configured to provide a switching report signal in response to fault occurrence in the corresponding linear protection domains or a linear protection switching operation, and perform a function of limiting use of the shared section in response to a provided lock signal, and a mesh protection switching processor configured to select at least one linear protection domain to be limited in use of the network resources of the shared section according to a predetermined reference when the switching report signal is provided and provide the lock signal to a linear protection switching processor corresponding to the at least one selected linear protection domain. | 04-05-2012 |
| 20120113800 | METHODS AND SYSTEMS FOR ENABLING END-USER EQUIPMENT AT AN END-USER PREMISE TO EFFECT COMMUNICATIONS WHEN AN ABILITY OF THE END-USER TO COMMUNICATE VIA A COMMUNICATION LINK CONNECTING THE END-USER EQUIPMENT TO A COMMUNICATIONS NETWORK IS DISRUPTED - A method for effecting communications, such as telephone calls, accesses to data network sites, alarm system communications, and/or other communications, over a communications network. The method comprises: determining that an ability of first end-user equipment at a first end-user premise to communicate via a first communication link connecting the first end-user equipment to the communications network is disrupted; establishing a wireless communication link between the first end-user equipment and second end-user equipment at a second end-user premise; and causing information transmitted by or destined for the first end-user equipment to be exchanged over the communications network via the wireless communication link and a second communication link connecting the second end-user equipment to the communications network. Also provided are apparatus and computer-readable media containing a program element executable by a computing system to perform such a method. | 05-10-2012 |
| 20120120789 | SYSTEMS AND METHODS FOR IMPROVING CIRCUIT SWITCHED FALLBACK PERFORMANCE - Methods and apparatus for improving Circuit Switched (CS) Fallback performance, such as in an LTE network, are described. In one aspect, a UE may perform a RAU procedure before performing a CS call setup procedure when the UE has camped on a Non-DTM GERAN target after failing to access a redirection target. In another aspect, an MME may determine whether to perform a PS suspension based on an ISR status associated with a user terminal. In another aspect, an eNB may send information associated with a PS suspension to a user terminal. | 05-17-2012 |
| 20120127856 | ELECTRONIC PATCH DEVICE, NETWORK SYSTEM, AND OPERATION METHOD IN NETWORK SYSTEM - Provided are an electronic patch device, network system, and operation method in the network system. The network system includes n (n is a natural number equal to or greater than 1) network equipments, a backup network equipment used for backing up one of the n network equipments, n terminals connected to the n network equipments respectively, and a distributor connecting respective lines between the n network equipments and the n terminals and replacing one of the n network equipments with the backup network equipment according to necessity. Here, a plurality of the distributors are connected in parallel. | 05-24-2012 |
| 20120155247 | METHOD AND APPARATUS FOR PROTECTING SUBSCRIBER ACCESS NETWORK - Embodiments of the present disclosure disclose a method and an apparatus for protecting a subscriber access network, and relate to the field of communications. The method includes: connecting a Broadband Network Gateway BNG device and N predetermined Digital Subscriber Line Access Multiplexers DSLAMs to an aggregation device AGG; allocating an active BNG interface for each of the N DSLAMs, allocating a standby BNG interface set for the N DSLAMs to obtain a backup relationship, and sending the backup relationship to the AGG ( | 06-21-2012 |
| 20120170448 | Method and Network System for Implementing User Port Orientation in Multi-Machine Backup Scenario of Broadband Remote Access Server - A method and network system for implementing user port locating in multi-machine backup scenario of broadband remote access server (BRAS) are disclosed. The method comprises: configuring master port in each backup group as user access port and synchronizing information of taking the maser port as user access port to the backup port in the backup group; a remote authentication dial in user service (RADIUS) server configuring access port information, which is set as the master port in the backup group, for the user; processing master-backup switch if the master port is abnormal and the user accessing the line from the corresponding backup port; the BRAS corresponding to the backup port encapsulating the authentication message including the access line information about digital subscriber line access multiplexer of the user access and taking the maser port as the user access port, and sending the authentication message to the RADIUS server. | 07-05-2012 |
| 20120182862 | Method and Apparatus for Improving Data Integrity During a Router Recovery Process - An apparatus and method for enhancing data integrity during router recovery using dual-homed host configuration are disclosed. A process of routing resumption, in one embodiment, is able to recover or reset a network element (“NE”) such as a primary router from system failure. A first link configured to transmit data packets between the NE and a network device is reestablished. Upon reestablishing a second link configured to transmit data packets between the NE and other NEs, a network discovery process utilizing network reachability protocol is initiated to identify routing paths associated with the NE. A routing table in the NE is updated in accordance with the routing paths. A ready message is issued from the NE to the network device when the routing table is at least partially completed. | 07-19-2012 |
| 20120195187 | COMPUTER SYSTEM AND MAINTENANCE METHOD OF COMPUTER SYSTEM - A computer system of the present invention is provided with a switch for transferring a received packet data to a destination according to a flow set to itself, an integrated management apparatus which specifies a maintenance object unit and a controller. The controller separates the maintenance object unit from the computer system by controlling the setting or deletion of the flow to the switch. Thus, the maintenance processing of the computer system can be performed without stopping the function by controlling the side of the network and the side of the computer integratedly. | 08-02-2012 |
| 20120236708 | SYSTEM AND METHOD FOR SESSION RESILIANCY AT GEO-REDUNDANT GATEWAYS - A method, system and apparatus for managing a backup service gateway (SGW) associated with a primary SGW, the backup SGW periodically receiving from the primary SGW at least a portion of corresponding UE session state information and in response to a failure of the primary SGW, assuming management of IP addresses and paths associated with the primary SGW, and in response to receiving control or data plane traffic associated with a UE, generating a Downlink Data Notification (DDN) message adapted to inform an MME that the UE is in a live state. | 09-20-2012 |
| 20130003528 | JOINT NEAR-END AND FAR-END STATE MACHINE FOR SERVICE PROTECTION NETWORKS - In one embodiment, a method for telecommunications includes determining the operational state of a first network switch, determining the operational state of a second network switch, determining the existence of an actionable condition, accessing information on the first switch, and changing the operational state of the first switch. The second network switch is coupled to the first network switch by a protected path. Determining the actionable condition and changing the operational state use references to the operational state of the first network switch, the operational state of the second network switch, and the actionable condition. | 01-03-2013 |
| 20130194912 | SEA FAILOVER MECHANISM WITH MINIMIZED PACKET LOSSES - Provided are techniques for active SEA learning about a client LPAR MAC addresses via address resolution protocol (ARP) packets received on a virtual interface (of the active SEA). Any new client MAC addresses learned on the active SEA are sent to the inactive SEA via a control channel. When SEA failover happens, as the previously inactive SEA is about to become active, it will first send out RARP (reverse ARP) packets with the client MAC addresses as the source MAC addresses respectively. This effectively informs the switch connected to the previously inactive SEA that these client MAC addresses are to be routed through this switch port; the client MAC addresses saved on the switch connected to the previously active SEA are cleared as a result. | 08-01-2013 |
| 20130201820 | TRIGGERING A REDUNDANT ROUTER MASTER/BACKUP STATUS CHANGE BASED ON SWITCH CONNECTIVITY - Systems and methods according to the exemplary embodiments enable improved switch or link failure handling. A redundant router master/backup status change may be triggered based on switch connectivity. According to an exemplary embodiment, a method is provided. The method includes monitoring a connectivity of a network, detecting a failure, and based on the detected failure, changing the redundant router master/backup status of both a first router and at least a second of router. | 08-08-2013 |
| 20130250752 | DATA FORWARDING METHOD AND ROUTER - A data forwarding method and a router are provided. The router includes: forwarding engines FEs, physical interface cards PICs, a first switch device and a second switch device, where the first switch device includes a primary first switch device and a standby first switch device, all the FEs are connected with each other via the first switch device, the FEs are connected to the PICs via the second switch device, the number of the FEs is at least two, the number of the PICs is at least two, and the number of the FEs is equal to the number of the PICs. Embodiments of the present invention could improve reliability of a system. | 09-26-2013 |
| 20130308442 | MANAGEMENT DEVICE AND MANAGEMENT METHOD - A management device includes a node selecting unit, a replicating unit, and a switching unit. The node selecting unit selects a backup node for a management node, from a plurality of nodes in a network formed from a plurality of networks by a specific rule based on multiple indexes that include at least one of the management range to which the node belongs to, the volume of data, and an operation time. The replicating unit replicates management information to the backup node. The switching unit switches, when the management node stops, the backup node to the management node. | 11-21-2013 |
| 20130329547 | COMMUNICATION DEVICE AND METHOD OF CONTROLLING THE SAME - Provided is a communication device including a plurality of physical ports, the communication device holding information for associating each of at least one logical port and at least two physical ports, the communication device being configured to: identify, when any one of the plurality of physical ports receives data including user data, one of the at least one logical port as an output destination of the data based on destination information included in the received data; select, based on the data, one of the at least two physical ports associated with the identified logical port as an destination of the data; generate coupling check data relating to one of the plurality of physical ports; transmit the coupling check data from the one of the plurality of physical ports; and transmit data including the user data from the physical port selected by a first processing unit as the output destination. | 12-12-2013 |
| 20140016455 | METHOD, DEVICE, AND SYSTEM FOR PROVIDING A SURVIVABILITY GATEWAY SERVICE - A method and apparatus dynamically pair a user's communication devices with a personal survivability gateway. The gateway can support the establishment of communication services in case of a network failure between a site where the user's communication devices are located and the site that provides the user's communication services. Preferably, the survivability gateway is configured so that if a network failure occurs, the user does not experience service degradation, or at least significant service degradation. For instance, the user's inbound and outbound communications during such an outage may be routed through his personal survivability gateway and a survivability proxy to limit, if not eliminate such service degradation. | 01-16-2014 |
| 20140056122 | PROCEDURES, APPARATUSES, SYSTEMS, AND COMPUTER-READABLE MEDIA FOR OPERATING PRIMARY AND BACKUP NETWORK ELEMENTS - Procedures, apparatuses, systems, and computer-readable media for operating primary and backup network elements (NEs). The procedure for operating the primary NE includes determining a failure in a primary path in which the primary NE is interposed. A switch-over notification message is provided via an inter-chassis communication link to a backup NE. At least one status synchronization message is communicated with at least one of the backup NE via the inter-chassis communication link and a head-end NE in accordance with a standardized protection switching protocol. The procedure for operating the backup NE includes receiving the switch-over notification message, indicating failure in a primary path, via the inter-chassis communication link. A status synchronization message is provided in accordance with the standardized protection switching protocol to a head-end NE to establish communication with the head-end NE via a secondary path. | 02-27-2014 |
| 20140071810 | COMMUNICATION SYSTEM AND PROCESSING METHOD THEREFOR - A communication system includes a redundancy network, which includes first and second switch apparatuses and employs a ring protocol or the like, and third switch apparatuses. The first and second switch apparatuses function logically as a signal switch apparatus (MLAG). Each third switch apparatus operates with link aggregation (LAG) being set between the third switch apparatus and the first and second switch apparatuses. When a failure occurs in communication between redundant ports of the first and second switch apparatuses, a fourth switch apparatus supporting the ring protocol performs control to put master and slave ports thereof into an open state and the second switch apparatus performs control to put user ports thereof into a blocking state. | 03-13-2014 |
| 20140126352 | COMMUNICATION SYSTEM AND NETWORK RELAY DEVICE - In order to provide a communication system and a communication system processing method with which fault resistance is improved and also signal loopback can be prevented, a communication system is provided with, for example, port switches SWP | 05-08-2014 |
| 20140126353 | BUILDING BASEBAND UNIT, BASEBAND PROCESSING PANEL, AND FAILURE PROCESSING METHOD FOR BASEBAND PROCESSING PANEL - Disclosed are a building baseband unit, a baseband processing panel, and a failure processing method for the baseband processing panel. A direct path is introduced respectively for a baseband processing module and a power supply module in a baseband processing panel; when the baseband processing module has failed, the baseband processing module is directly bypassed, and a part of the baseband processing resources of a baseband processing panel in normal operation is allocated to an RRU corresponding to the failed baseband processing panel via a back panel and the direct path; and when both the baseband processing module and the power supply module have failed, both of them are directly bypassed, and a part of the baseband processing resources of a baseband processing panel in normal operation is allocated to the RRU corresponding to the failed baseband processing panel via the back panel and the direct path, and at the same time the power required for working is provided to an optical module via the back panel and another direct path. Applying the solution of the present invention can reduce implementation costs. | 05-08-2014 |
| 20140140201 | SEA FAILOVER MECHANISM WITH MINIMIZED PACKET LOSSES - Provided are techniques for active SEA learning about a client LPAR MAC addresses via address resolution protocol (ARP) packets received on a virtual interface (of the active SEA). Any new client MAC addresses learned on the active SEA are sent to the inactive SEA via a control channel. When SEA failover happens, as the previously inactive SEA is about to become active, it will first send out RARP (reverse ARP) packets with the client MAC addresses as the source MAC addresses respectively. This effectively informs the switch connected to the previously inactive SEA that these client MAC addresses are to be routed through this switch port; the client MAC addresses saved on the switch connected to the previously active SEA are cleared as a result. | 05-22-2014 |
| 20140160919 | METHOD AND NETWORK ELEMENT TO LIMIT SERVICE DISRUPTION DUE TO A FAILURE ON A LAYER 2 INTERFACE - A method in an active network element. The network element is coupled with a standby network element by an inter-chassis communication channel used to synchronize session state for sessions handled by the active network element from the active network element to the standby network element. The network element is deployed in a Layer 3 network that is used to transmit Layer 2 data. The method is one of limiting disruption in the handling of the sessions. The method includes monitoring a Layer 2 interface for failures and monitoring a Layer 3 interface for failures. A failure is detected on the Layer 2 interface. The network element communicates with the standby network element, over the inter-chassis communication channel, in response to detecting the failure on the Layer 2 interface, to have the standby network element at least assist with the handling of the sessions. | 06-12-2014 |
| 20140192633 | SYSTEM AND METHOD FOR PROVIDING FAST AND EFFICIENT FLUSHING OF A FORWARDING DATABASE IN A NETWORK PROCESSOR - Aspects of the disclosure pertain to a system and method for providing fast and efficient flushing of a forwarding database in a network processor. The present disclosure provides a deterministic mechanism to implement a flush operation for flushing the forwarding database. A dual FDB approach, a means for switching from one FDB to another in the event of a failure, and FDB flush operation as a background task are key features of this disclosure. The effective time for completing the flush operation is within a sub-50 millisecond time frame and is independent of the number of entries in the forwarding database. The flush operation may be performed using software. | 07-10-2014 |
| 20140204730 | Implementing Gateway Redundancy in a Network - Implementing gateway redundancy in a network includes sending a message to a first device of multiple devices of a network through a controller where the first device is a master gateway and a second device of the multiple devices is a backup gateway, and making a decision as to whether the first device remains as the master gateway. | 07-24-2014 |
| 20140211609 | IMPLEMENTING A SWITCH FABRIC RESPONSIVE TO AN UNAVAILABLE PATH - In a method for implementing a switch fabric, in a first fabric chip, a packet comprising an identification of a destination node chip is received from a source fabric chip, and a determination that a first path in the switch fabric along which the packet is to be communicated toward the destination node chip is unavailable is made. In addition, a determination as to whether another path along which the packet is to be communicated toward the destination node chip that does not include the source fabric chip is available is made. In response to a determination that the another path is available, the packet is communicated along the another path. In addition, in response to a determination that the another path is unavailable, the packet is communicated back to the source fabric chip. | 07-31-2014 |
| 20140233371 | NETWORK MANAGEMENT SYSTEM - It is to realize a network management system which can suppress to a minimum a time during which it is impossible to make a communication when a trouble occurs in any of field wireless management stations formed to be redundant. | 08-21-2014 |
| 20140301184 | COMMUNICATION RELAY APPARATUS, ACTIVE SYSTEM SWITCHING METHOD, AND COMMUNICATION RELAY CONTROL BOARD - A communication relay apparatus in which when an operation state of a first board is an active system and a fault in the first board is detected, a first transmission control circuit gives an instruction to an IF unit as to whether usage of a first transmission path is allowed and notifies a second transmission control circuit and a first communication state control unit that the fault is detected, the second transmission control circuit gives an instruction to the IF unit as to whether usage of a second transmission path is allowed, and when an evaluation is made to switch the operation state of the first board to the standby system, the first communication state control unit starts to take over the communication state of the communication data, which has passed through the first transmission path, to the second communication state control unit. | 10-09-2014 |
| 20140307540 | METHOD AND SYSTEM FOR MULTICHASSIS LINK AGGREGATION IN-SERVICE SOFTWARE UPDATE - A method for performing an in-service software update in a MLAG domain. The method includes restarting the first switch using a second version of software, detecting by a second switch that the first switch is restarting and, in response to the detection, SSO. After restarting the first switch, prior to the first switch performing graceful reinsertion into the MLAG domain, setting all non-peer ports on the first switch to an error-disabled state and selecting a common MLAG protocol version supported by the first switch and the second switch and performing graceful reinsertion, which includes reestablishing a peering relationship between the first switch and the second switch using the common MLAG protocol, and after reestablishing the peering relationship, synchronizing a control plane state of the first switch with the control plane state of the second switch and setting all non-peer ports on the first switch to an active state. | 10-16-2014 |
| 20150016243 | COMPACT ROUTER WITH REDUNDANCY - A compact router with redundancy includes embodiments having main and backup crosspoint switching devices wherein one of the switching devices is removable from a main circuit board via a quick disconnect means such as an electrical connector. | 01-15-2015 |
| 20150036480 | POLICY-DRIVEN AUTOMATIC REDUNDANT FABRIC PLACEMENT MECHANISM FOR VIRTUAL DATA CENTERS - In one embodiment, a service provider management device provides a plurality of redundant fabric motifs, each indicating a subgraph pattern of logical connections for network segments of a virtual data center, and receives virtual data center tenant selection of one or more of the redundant fabric motifs for particular pairs of data center segments of the virtual data center. After determining available physical data center resources that correspond to the tenant selection of one or more of the redundant fabric motifs for particular pairs of data center segments, logical connections may then be established between particular network segments for the virtual data center according to the available physical data center resources corresponding to the tenant selection of one or more of the redundant fabric motifs for particular pairs of data center segments. | 02-05-2015 |
| 20150092537 | RECOVERY OF ESTABLISHED EMERGENCY CALLS - A system, method and apparatus for re-establishing a call received at a public safety answering point are described. A Session Initiation Protocol (SIP) call establishment request is received at an emergency call answer node. The call establishment request has an indication of a previously established emergency call to re-establish. The emergency call answer node searches a call recovery queue for a previously received call establishment request having a matching indication for the previously established emergency call to re-establish. The emergency call answer node bridges a call leg for the received call establishment request and a call leg for the previously received call establishment request having the matching indication for the previously established emergency call to re-establish when a match is found. | 04-02-2015 |
| 20150350062 | EFFICIENT IDENTIFICATION OF NODE PROTECTION REMOTE LFA TARGET - A method is implemented by a network device to improve efficiency of computing a node-protecting remote loop-free alternate (LFA) in a network topology graph. The method computes a reverse shortest path first (SPF) algorithm rooted at the primary next hop node, where the reverse SPF algorithm rooted at the primary next hop maintains a reverse path of a shortest path computed by the reverse SPF algorithm rooted at the primary next hop node. The method selects a node that is in both the source node's node-protecting extended P-space that protects the primary next hop node and the primary next hop node's link-protecting Q-space that protects the S-E link. The method traverses the reverse path of the shortest path computed by the reverse SPF algorithm rooted at the primary next hop node starting from the selected node and towards the primary next hop node and assigns the selected node as a node-protecting remote LFA for each S-E destination node visited along the traversal of the reverse path that has not been assigned a node-protecting remote LFA. | 12-03-2015 |
| 20160050104 | NETWORK DEVICE ARCHITECTURE ADJUSTMENTS - An example method of adjusting network device architecture can include sending a network decision from a controller to at least one network device that communicates units of data through a network infrastructure, the network decision based on information received from a number of network devices on the network infrastructure. The method can include adjusting the network device architecture for the at least one network device based on the network decision sent by the controller. | 02-18-2016 |
| 20160080195 | METHODS AND SYSTEMS FOR SERIAL DEVICE REPLACEMENT WITHIN A BRANCH ROUTING ARCHITECTURE - A method includes deploying in series a plurality of configurable devices in a network configured to communicate with one another via a protocol for exchanging state information wherein at least one of the plurality of configurable devices is in an active state and at least one of the plurality of devices is in a standby state, detecting, by the at least one of the plurality of configurable devices in a standby state, a failure of a configurable device in an active state via a protocol and switching the at least one configurable device in a standby state to an active state. | 03-17-2016 |
| 20160094442 | PROTOCOL INDEPENDENT MULTICAST (PIM) REGISTER MESSAGE TRANSMISSION - Embodiments of the invention relate to register message transmission control in a system. One embodiment includes forwarding a communication packet to a first switch. A multicast source route entry is created by the first switch based on the communication packet. The communication packet is forwarded from the first switch to a second switch. A duplicate of the multicast source route entry is created by the second switch based on the forwarded communication packet. A register message is sent to a router by one of the first switch and the second switch based on a first vLAG role. Sending of a duplicate of the register message by one of the first switch and the second switch is prevented based on a second vLAG role. | 03-31-2016 |
| 20160119179 | Transparent PSTN Failover - Novel tools and techniques for implementing Transparent PSTN Failover. In some embodiments, a VoIP switch might receive a call request for connection between a calling party at a calling telephone number (“TN”) and a called party at a called TN. Based on a determination that connection via a session border controller (“SBC”) between the VoIP switch and an Internet Protocol (“IP”) gateway has been lost, the VoIP switch might route the call request to a PSTN redirect TN through the PSTN. One of the Class 5 switch of the PSTN or the IP gateway might replace the redirect TN with the called TN, based on a determination that the redirect TN represents a PSTN failover. The IP gateway may then route the call request to an IP PBX for terminating (establishing) the call connection between calling party and called party, without interception by an operator, receptionist, or auto attendant. | 04-28-2016 |
| 20160134467 | METHOD AND APPARATUS FOR SWITCHING BETWEEN MASTER DEVICE AND BACKUP DEVICE - The present application relates to a method and an apparatus for switching between a master device and a backup device. The method for switching between a master device and a backup device includes: when an access device accesses a network by using the master device, detecting an interface that is on the master device and directly connected to the access device or a transmission device, so as to determine whether a link between the access device and the master device fails; and when it is determined that the link between the access device and the master device fails, instructing a redundancy group with a routing function to perform switching between the master device and the backup device, so that the access device accesses the network by using the backup device that is before the switching. | 05-12-2016 |
| 20160191304 | LAYER 3 HIGH AVAILABILITY ROUTER - Systems and methods for providing Open Systems Interconnection (OSI) layer 3 highly-available routers. An example method comprises: receiving a request to create a highly-available (HA) virtual router; configuring a HA virtual router to run on a plurality of network nodes, the HA virtual router comprising a master instance and a plurality of standby instances; assigning a floating Internet Protocol (IP) address associated with the virtual router to an internal network interface of the master instance; responsive to detecting a failure of the master instance of the HA virtual router, identifying a standby instance to act as a new master instance; and assigning the floating IP address to an internal network interface of the new master instance. | 06-30-2016 |
| 20220141084 | FAILURE DETECTION AND SEAMLESS TRAFFIC SWITCHOVER USING A VPN SYSTEM - Example implementation relates to a method of failure detection and seamless traffic switchover in a VPN system. A cluster of nodes exchange heartbeat messages to detect a failure at a first node in the cluster. When failure is detected at the first node, a master node transmits a failover message to a network end node connected to the first node. The failover message includes a list of active nodes to which traffic may be routed. The network end node updates its routing table based on the failover message and switches the traffic to a second node in the cluster of nodes. | 05-05-2022 |
