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7643407 |
Method and apparatus for determining protection transmission unit allocation
Protection transmission unit allocation, such as STS# in a SONET/SDH network utilizing time slot interchange on the working path, may be determined by disseminating connection information,...
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7639605 |
System and method for detecting and recovering from virtual switch link failures
A system and method detects and responds to failures occurring in a virtual switch. The virtual switch is formed from two or more physical switches interconnected by a Virtual Switch Link (VSL)....
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7639648 |
Techniques for home wireless switch redundancy and stateful switchover in a network of wireless switches supporting layer 3 mobility within a mobility domain
Techniques and technologies are provided for recovering from failure of a home wireless switch in a network of wireless switches which includes an initial home wireless switch of at least one...
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7630299 |
Retention of a stack address during primary master failover
The present invention features embodiments of alleviating the impact to a system of stack switches, as well as to neighboring nodes communicating with such a system, when a primary master switch to...
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7630296 |
System and method for remotely restoring inoperative data communications
A method for remotely restoring inoperative data communications is disclosed. The method includes generating a predetermined sequence of signals at a first Communications unit. The method further...
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7623444 |
Apparatus and method for redundancy control of duplex switch board
An apparatus and method for a redundancy control in duplex switch boards in a high speed network system are provided. The apparatus includes: a switching unit for switching data inputted one of the...
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7613150 |
Hitless restart mechanism for non-stop data-forwarding in the event of L3-mobility control-plane failure in a wireless switch
Techniques and technologies are provided for restarting a first wireless switch when the first wireless switch fails. For example, after the first wireless switch fails, the first wireless switch...
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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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7609618 |
Dynamically controlling HSRP preemption dependent on stateful NAT convergence
The invention relates to a method for switchover from an active node to a standby node wherein when a standby network node restarts, designation of the standby node as a new active node is delayed...
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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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7602699 |
Protection method and system for equipment in a network element
A protection method and system for equipment in a network element receives a protection request for an equipment item. A priority of the request and a priority of the equipment item is evaluated...
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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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7599285 |
Combined electro-mechanical and solid state switching fabric
According to the present invention, methods and apparatus are provided to allow efficient switching of cable lines from failed line cards to protect line cards. Line cards may be arranged in...
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7596642 |
System and program for determining the availability of paths to a device
Disclosed is a system and program for selecting one of multiple proposed paths to a device. For each proposed path, a determination is made of a number of components the proposed path shares with...
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7586838 |
Flexible M:N redundancy mechanism for packet inspection engine
A system, mechanism and method are provided for inspecting packets. Application processing engines (ASEs) inspect an IP packet flow of subscribers. It is determined whether any of the ASEs is...
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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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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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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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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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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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7518983 |
Proxy response apparatus
A proxy response apparatus is equipped with a module that obtains and retains request messages and response messages exchanged between a client and main and backup servers, a module for detecting a...
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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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7515528 |
Host fail-over switch presence detection compatible with existing protocol and host controllers
A method and apparatus for detecting a presence of a fail over switch is described. In one embodiment, during an Serial ATA sequence initialization handshake, a host transmits a COMRESET to a...
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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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7486615 |
Network data routing protection cycles for automatic protection switching
A computer network processes data packets in the event of a network link failure. The network includes a plurality of routers that deliver data packets to the network via a plurality of links. At...
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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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7477847 |
Optical and electrical channel feedback in optical transceiver module
Optical transceivers have loopback and pass-through paths for diagnosing transceiver components and optical networks connected to the optical transceiver or for routing data out of the transceiver...
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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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7457236 |
Method for providing fault-tolerant application cluster service
A method for providing an application cluster service (APCS) with fault-detection and failure-recovery capabilities. This method is composed of the steps of nodes clustering, invoking and detecting...
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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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7451252 |
Method for determining the availability of paths to a device
Disclosed is a method for selecting one of multiple proposed paths to a device. For each proposed path, a determination is made of a number of components the proposed path shares with existing...
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7430165 |
Wireless communication device and radio communication system using the same
A wireless communication apparatus has a current system and a standby system independent of each other. An interface circuit 1 a of a radio 10 a outputs two signals input from an MUX device ...
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7423962 |
Redundancy and load balancing in a telecommunication unit and system
The invention relates to backing up a network element (NE) in a telecommunications system. The network element (NE) comprises at least two cluster nodes (A, B, C) that are redundancy units of each...
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7421612 |
Method and system for optimized switchover of redundant forwarding engines
A method of failure recovery in a network element is disclosed. The method includes indicating to a number of forwarding engines that a forwarding engine has completed a switchover operation and...
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7417947 |
Routing protocol failover between control units within a network router
A device includes a primary control unit and a standby control unit. The standby control unit records routing communications exchanged between the primary control unit and an external routing...
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7411945 |
Adaptive router architecture enabling efficient internal communication
A router comprising a plurality of elements, each having an element identifier, subdivided into a plurality of groups of at least one element. Each group has a common identifier and each member...
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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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7394759 |
Method of negotiating an active or a passive role assignment to a control means of a network element, a control means, a program module and a network element therefor
The present invention relates to a method of negotiating an active or a passive role assignment to a first and a second control means of a network element. The control means are redundant and...
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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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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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7345992 |
System and method for embedding a sub-channel in a block coded data stream
The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the...
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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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7333427 |
Router system and method of duplicating forwarding engine
The present invention discloses a router system receiving data from a predetermined node in networks, and transmitting the data to an appropriate node by switching the data according to routing...
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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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7310306 |
Method and apparatus for ingress port filtering for packet switching systems
Methods and apparatus are disclosed herein for ingress port filtering for packet switching systems. One implementation includes a mechanism to duplicate and provide an incoming packet stream to...
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7304941 |
Switchover system and method in a data packet switching network
A switchover system and method is described. The invention preferably operates in a data packet switching system for transmitting through a switching arrangement data packets that comprise at least...
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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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