Patent
Network restoration using refreshed switch state tables
Reads0
Chats0
TLDR
In this paper, an exemplary method and optical network (10) that provides optical network restoration using refreshed state tables (56, 64) for recovering from a failure in an optical network using refreshed switch state tables is presented.Abstract:
An exemplary method and optical network (10) that provide optical network restoration using refreshed state tables (56, 64) for recovering from a failure in an optical network (10) using refreshed switch state tables (56, 64) includes generating and storing connection information in switch state tables of associated optical switches (50) that define optical link connections to be made in the event of a failure, monitoring whether a failure has occurred, and refreshing the switch state tables (56, 64) by continuing to generate and store connection information in the plurality of switch state tables that are associated with the plurality of optical switches (50) of the optical network (10) until the failure in the optical network (10) is detected. Optical switching is automatically performed in the optical switches based on the lookup table connection information in the switch state tables that are associated with the optical switches. The exemplary method may then include determining whether any of the telecommunications traffic in the optical links of optical network was not restored due to the optical switching that was automatically performed.read more
Citations
More filters
Patent
Method and apparatus for implementing and managing virtual switches
Martin Casado,Paul S. Ingram,Keith E. Amidon,Peter J. Balland,Teemu Koponen,Benjamin L. Pfaff,Justin Pettit,Jesse E. Gross,Daniel J. Wendlandt +8 more
TL;DR: In this paper, the authors propose a virtual platform in which one or more distributed virtual switches can be created for use in virtual networking, which can support integration with traditional IP networks and support sophisticated IP technologies including NAT functionality, stateful firewalling and notifying the IP network of workload migration.
Patent
Network operating system for managing and securing networks
Martin Casado,Scott Shenker,Keith E. Amidon,Peter J. Balland,Natasha Gude,Justin Pettit,Benjamin L. Pfaff,Daniel J. Wendlandt +7 more
TL;DR: In this article, a view of current state of the network is maintained where the current state characterizes network topology and network constituents, including network entities and network elements residing in or on the network.
Patent
Circuit protection system
Thomas F. Papallo,Gregory P. Lavoie,David Fletcher,Ertugrul Berkcan,William James Premerlani +4 more
TL;DR: A circuit protection system including a CCPU (28) that provides dynamic zones of protection (895, 896) for the circuit is provided in this paper, based on the topology of the circuit.
Patent
Method and apparatus for robust packet distribution among hierarchical managed switching elements
Martin Casado,Teemu Koponen,Pankaj Thakkar,W. Andrew Lambeth,Alexander Yip,Keith E. Amidon,Paul S. Ingram +6 more
TL;DR: In this paper, the authors propose a method of distributing packet processing across the several managed non-edge switching elements, based on a determination that the packet needs to be processed by a managed nonedge switching element.
Patent
Network virtualization apparatus and method with a table mapping engine
TL;DR: In this article, the authors present a virtualization for managing a plurality of managed switching elements that forward data through a network, including a table mapping engine for mapping the input logical forwarding plane data in the first set of tables to output physical control plane data by performing a set of database join operations.
References
More filters
Patent
Method and apparatus for self-restoring and self-provisioning communication networks
TL;DR: In this paper, the authors propose a method and apparatus for restoring communications between a pair of nodes in a network having an arbitrary number of nodes and a number of spans interconnecting the nodes, each span having working circuits between nodes designated for transmitting actual communications traffic and spare circuits capable of but not designated for, transmitting actual communication traffic.
Patent
Inter-ring cross-connect for survivable multi-wavelength optical communication networks
TL;DR: In this article, a 3x3 interconnect is proposed for WDM optical networks, where each of the interconnected rings is self-healing by provision of a redundant counter-rotating ring or excess capacity on pairs of counterrotating rings.
Patent
Apparatus and method for spare capacity allocation
Yu Liu,David Tipper +1 more
TL;DR: In this paper, a method for deriving a backup path routing spare capacity template that is feasible, scalable, adaptive, much faster, and near global optimal in redundancy reduction is given.
Patent
Method and apparatus for rapidly restoring a communication network
TL;DR: In this article, the authors propose an approach to reconnect a communications network such as a DS3 telephone-type network when a span of DS3 channels is rendered inoperative, such as by cutting, within the 1.5 second time frame necessary to prevent disablement of local offices.
Patent
Distributed preconfiguration of spare capacity in closed paths for network restoration
TL;DR: In this article, a method for finding and constructing closed paths is described in which statelets are broadcast through the network, in a preferred method of implementation, the statelet broadcast occurs not in response to a network failure, but across the entire network before any particular span failure and may be carried out during normal network operations as a continual re-configuration of the network.