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141 results about "Routing domain" patented technology
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In computer networking, a routing domain is a collection of networked systems that operate common routing protocols and are under the control of a single administration. For example, this might be a set of routers under a control of a single organization, some of them operating a corporate network, some others a branch office network, and the rest the data center network.
Telecommunication routing using multiple routing protocols in a single domain
InactiveUS7177646B2Improve routing efficiencyAssess restrictionSpecial service for subscribersRouting domainNetwork addressing
Packets are routed in a communications network including an infrastructure of packet switching nodes interconnected by packet transport links, and a plurality of access nodes to which a routing path, defined by data held in packet switching nodes located along the routing path, may be directed in the infrastructure for a given network address. Different types of routing updates are used in a single routing domain.
Owner:BRITISH TELECOMM PLC
Providing reachability information in a routing domain of an external destination address in a data communications network
An apparatus for providing reachability in a routing domain of a data communications network having as components nodes and links therebetween for a routing domain—external destination address is described. The apparatus is arranged to advertise destination address reachability internally to nodes in the routing domain and associate a reachability category with said internal advertisement of said destination address reachability.
Owner:CISCO TECH INC
Method and system for extending routing domain to non-routing end stations
ActiveUS20110235523A1Optimize allocationError preventionFrequency-division multiplex detailsReachabilityRouting domain
A system is provided for facilitating assignment of a virtual routing node identifier to a non-routing node. During operation, the system assigns to a non-routing node coupled to a switch a virtual routing node identifier unique to the non-routing node. In addition, the system communicates reachability information corresponding to the virtual routing node identifier to other switches in the network.
Owner:AVAGO TECH INT SALES PTE LTD
Fast reroute (FRR) protection at the edge of a RFC 2547 network
InactiveUS20060126496A1Quickly and efficiently forwardedFast reroute (FRR)Error preventionFrequency-division multiplex detailsRouting domainInter-domain
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 link failure that prevents it from communicating with the neighboring domain, the first edge device reroutes at least some data packets addressed to the neighboring domain to the second edge device. The second edge device receives the rerouted packets and then forwards the packets to the neighboring domain. Notably, the second edge device is not permitted to reroute the received packets a second time, e.g., upon identifying another inter-domain node or link failure. As such, loops are avoided at the edge of the network and packets are rerouted to the neighboring routing domain faster and more efficiently than in prior implementations.
Owner:CISCO TECH INC
Loop prevention technique for MPLS using two labels
InactiveUS20060164975A1Fast and efficientProtect dataError preventionTransmission systemsInternet trafficRouting domain
A fast reroute (FRR) technique is implemented at the edge of a network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being “protected” (i.e., rerouted) data packets before they are forwarded to the backup edge device. To differentiate which data packets are protected and which are not, the backup edge device employs different sets of VPN label values for protected and non-protected network traffic. That is, the backup edge device may allocate two different VPN label values for at least some destination address prefixes that are reachable through the neighboring domain: a first VPN label value for FRR protected traffic and a second VPN label value for non-protected traffic. Upon receiving a data packet containing a protected VPN label value, the backup edge device is not permitted to reroute the packet a second time, e.g., in response to another inter-domain node or link failure, thereby preventing loops from developing at the edge of the network.
Owner:CISCO TECH INC
Method and system for extending routing domain to non-routing end stations
A system is provided for facilitating assignment of a virtual routing node identifier to a non-routing node. During operation, the system assigns to a non-routing node coupled to a switch a virtual routing node identifier unique to the non-routing node. In addition, the system communicates reachability information corresponding to the virtual routing node identifier to other switches in the network.
Owner:AVAGO TECH INT SALES PTE LTD
Algorithm for backup PE selection
InactiveUS20060209682A1Reduce settingsError preventionFrequency-division multiplex detailsRouting domainMetric 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 domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The backup edge device is not permitted to reroute the packets a second time. According to the inventive technique, the edge device first identifies a group one or more possible backup edge devices and then selects at least one preferred backup edge device from the group. The edge device makes its selection based on the values of one or more metrics associated with the possible backup edge devices. The metrics are input to a novel selection algorithm that selects the preferred backup edge device(s) using a hierarchical selection process or a weighted-metric selection process, or some combination thereof.
Owner:CISCO TECH INC
Method of and System for Support of User Devices Roaming Between Routing Realms by a Single Network Server
ActiveUS20090193103A1Data switching by path configurationMultiple digital computer combinationsRouting domainNetwork packet
A network server provisioning at least one Local Area Network (LAN) comprising a client entry store, a packet driver module, a Dynamic Host Configuration Protocol (DHCP) request handler. The LAN has one or more routing realms. The client entry store stores records representing a user device connecting to the LAN provisioned by the network server as a roaming visitor of the LAN to gain temporal access to an outside network through the LAN, and records representing one or more routing realm top-level devices provided on a top level of each routing realm of the LAN. The packet driver module inspects packets arriving from and directed to the user device, and interacts with the client entry store to process the packets. The DHCP request handler examines address data in DHCP packets received from the user device and the records in the client entry store. At least one of the packet driver module and the DHCP request handler detects roaming between routing realms by the user device based on the data of the packets and the records in the client entry store, and assigns a new Internet Protocol (IP) address to the user device when roaming by the user device is detected.
Owner:SOLUTIONINC
Loop prevention techniques using encapsulation manipulation of IP/MPLS field
ActiveUS20060221813A1Avoid developmentFast reroute (FRR)Error preventionTransmission systemsRouting domainEdge device
A fast reroute (FRR) technique is implemented at the edge of a computer network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being “protected” (i.e., rerouted) data packets before they are forwarded to the backup edge device. To that end, the edge device incorporates an identifier into the rerouted data packets to indicate that the packets are being FRR rerouted. The identifier may be a predetermined value stored at a known location in the rerouted packets'encapsulation headers, such as in their MPLS or IP headers. Upon receiving a data packet containing the identifier, the backup edge device is not permitted to reroute the packet a second time.
Owner:CISCO TECH INC
Flow labels
ActiveUS20040125797A1Easy to useValid verificationData switching by path configurationNetwork data managementQuality of serviceData stream
There is disclosed a system for monitoring a packet data flow, comprising: a data flow source element including: determining means adapted to determine a quality of service identifier for the data flow; first generating means adapted to generate an encoded value in dependence on the quality of service identifier; allocating means adapted to allocate the quality of service identifier and the encoded value to the flow label for each data packet of the data flow; and transmitting means for forwarding data packets including flow labels to a routing domain; and a routing domain interface element including: receiving means for receiving data packets from the data flow source; second generating means adapted to generate a further encoded value in dependence on the quality of service identifier in a flow label of a data packet; comparing means adapted to compare the further encoded value to the encoded value in the flow label; and routing means adapted to selectively route the data packets in dependence on the comparing step.
Owner:MIND FUSION LLC
Loop prevention technique for MPLS using service labels
ActiveUS20060193248A1Avoid developmentOvercome disadvantagesError preventionTransmission systemsRouting domainInter-domain
A local fast reroute (FRR) technique is implemented at the edge of a computer network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being “protected” (i.e., rerouted) data packets before they are forwarded to the backup edge device. The backup edge device identifies protected data packets as those which contain a predetermined “service” label in their MPLS label stacks. In other words, the service label is used as an identifier for packets that have been FRR rerouted. Upon receiving a data packet containing a service label, the backup edge device is not permitted to reroute the packet a second time, e.g., in response to another inter-domain node or link failure, thereby preventing loops from developing at the edge of the network.
Owner:CISCO TECH INC
Route computation method and system, and path computation element
InactiveUS20100265943A1Efficient executionData switching by path configurationWireless communicationRouting domainPath computation element
A route computation method includes: receiving, by a first bottom-level PCE, a path computation command, performing a route computation on a routing domain managed thereby, obtaining and sending a path segment set with a first node to an upper-level PCE thereof; sending, by the upper-level PCE receiving the path segment set sent by a lower-level PCE, the path computation command to another lower-level PCE according to routing domains that a path to be established between the first node and a second node sequentially passes through, receiving path segment sets sent by all lower-level PCEs, and combining and sending all the received path segment sets to an upper-level PCE thereof, until a top-level PCE receives path segment sets sent by all lower-level PCEs thereof; and combining, by the top-level PCE, all the received path segment sets to generate a set of paths between the first node and the second node.
Owner:MASON LICENSING LLC
Routing topology bandwidth management methods and system
A system for facilitating bandwidth management in a routing domain (100), the system including: a domain bandwidth manager (116); and a plurality of area bandwidth managers (118, 120, 122, 124, 126, 128) coupled to the domain bandwidth manager and arranged in accordance with an OSPF hierarchical routing topology with the domain bandwidth manager at an upper level of the topology and each area bandwidth manager located in a different area of the routing topology in at least one lower level of the topology, wherein the domain bandwidth manager and the plurality of area bandwidth managers cooperatively coordinate admission control to a routing domain for facilitating a communication session between a source device and a destination device.
Owner:MOTOROLA SOLUTIONS INC
Algorithm for backup PE selection
InactiveUS7535828B2Reduce settingsError preventionFrequency-division multiplex detailsNetwork packetRouting domain
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 domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The backup edge device is not permitted to reroute the packets a second time. According to the inventive technique, the edge device first identifies a group one or more possible backup edge devices and then selects at least one preferred backup edge device from the group. The edge device makes its selection based on the values of one or more metrics associated with the possible backup edge devices. The metrics are input to a novel selection algorithm that selects the preferred backup edge device(s) using a hierarchical selection process or a weighted-metric selection process, or some combination thereof.
Owner:CISCO TECH INC
Method and system for topology construction and path identification in a two-level routing domain operated according to a simple link state routing protocol
ActiveUS7120120B2Minimal costColor television with pulse code modulationError preventionEntry pointRouting domain
A method and system for extracting and building end-to-end route information in a two-level, multi-area Internet protocol (IP) autonomous system (AS) operated according to a simple link state routing protocol such as the Integrated System to Integrated System (IS-IS) protocol is disclosed. The method and system enables a user, such as a network administrator, to explicitly identify a full set of paths (links and routers) that a given IP packet would potentially traverse from its entry point in the area of the AS where it originates until its exit point in its intended destination or exit area.
Owner:SONS OF INNOVATION LLC
System and method of providing a platform for optimizing traffic through a computer network with distributed routing domains interconnected through data center interconnect links
A system is disclosed for providing a platform for optimizing traffic through a computer network having first and second distributed routing domains interconnected through a data center interconnect link. The system comprises one or more servers storing method steps to be executed by the one or more servers. The method steps comprising determining values for QoS characteristics for all routes of traffic routed from first and second routing domains to a destination network and re-rerouting packets from the first routing domain to the second routing domain through the data center interconnect link with better QoS characteristics values than the QoS characteristics values for the first routing domain.
Owner:NOCTION INC
Multicast systems and methods for Segment Routing
ActiveUS20180324090A1Special service provision for substationNetwork connectionsRouting domainComputer science
A multicast method for Segment Routing includes, in a Segment Routing network with a plurality of nodes, wherein Segment Routing utilizes globally significant labels as node identifiers such that path state installation is only required at an ingress node of a Segment Routing domain, advertising a multicast flow by a source node; determining roles in the multicast flow for the plurality of nodes; and installing appropriate forwarding behavior for the multicast flow at the plurality of nodes based on the determined roles. The advertising can utilize Interior Gateway Protocol (IGP). For the multicast flow, source node segments are used to construct source routed trees rather than destination-based paths, wherein the source routed trees define broadcast paths, versus destination-based paths which are used in Segment Routing to define a node segment.
Owner:CIENA
Rapid response method for the failure of links between different routing domains
InactiveUS20060159076A1Function is disabledAvoid disadvantagesHydro energy generationData switching by path configurationResponse methodRouting domain
The invention relates to a rapid response method for the failure of a link between two routing domains in a packet-oriented network. Once the failure of a link has been identified, substitute routes are provided for the interrupted routes by the local selection of alternative routes and by the propagation of messages along the substitute routes. In contrast to conventional inter-domain protocols such as the BGP (Iborder gateway protocol) the transmission of messages and the associated modification to the routing only involves routing domains that lie along the replacement routes. In one embodiment, a network-wide propagation of messages takes place if the failure of the link represents a persistent breakdown. As a consequence, optimal routes are re-determined in the entire network. The invention provides breakdown compensation that is appropriate for temporary breakdowns and prevents instabilities that occur as a result of the use of conventional inter-domain protocols.
Owner:NOKIA SIEMENS NETWORKS GMBH & CO KG
Dynamic shared risk node group (SRNG) membership discovery
ActiveUS20060227723A1Faster and efficient identificationUpdated faster and more efficientlyData switching by path configurationBorder Gateway ProtocolRouting domain
A technique is provided for dynamically discovering shared risk node group (SRNG) memberships of a plurality of interconnected edge devices in a computer network. According to the technique, each edge device “learns” the identities of its directly-attached peer devices situated in neighboring routing domains, e.g., by establishing an interior or exterior gateway routing protocol session with each peer. Thereafter, each edge device advertises the identities of its learned peers to the other interconnected edge devices. Preferably, the peer identities are distributed in novel “peer-router” extended community attributes transported in Border Gateway Protocol (BGP) messages. After an edge device has learned the identity of its own peers and received the identities of the other edge devices' peers, the device can automatically detect SRNG memberships in the computer network. Specifically, edge devices that advertise the same peer are determined to participate in the same SRNG.
Owner:CISCO TECH INC
Fast reroute (FRR) protection at the edge of a RFC 2547 network
InactiveUS7551551B2Fast reroute (FRR)Faster and more efficientlyError preventionFrequency-division multiplex detailsRouting domainInter-domain
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 link failure that prevents it from communicating with the neighboring domain, the first edge device reroutes at least some data packets addressed to the neighboring domain to the second edge device. The second edge device receives the rerouted packets and then forwards the packets to the neighboring domain. Notably, the second edge device is not permitted to reroute the received packets a second time, e.g., upon identifying another inter-domain node or link failure. As such, loops are avoided at the edge of the network and packets are rerouted to the neighboring routing domain faster and more efficiently than in prior implementations.
Owner:CISCO TECH INC
Method for determining abstract topological link attribute for optical network hierarchical route
InactiveCN1529429AEfficient determinationTransfer ability to understandMultiplex system selection arrangementsElectromagnetic transmissionTopology informationRouting domain
The method includes following steps: configuring route domain of network and determining boundary nodes and spokesman nodes of route domain; through 'flood' procedure in route protocol, all nodes in route domain obtain full topology information of the route domain; based on configuration information of boundary nodes and network topology information in the route domain, the spokesman nodes generate full connection conglomerate topology of this route domain, and obtain abstracting link of connection between conglomerate topology route and node; calculating available bandwidth attribute of abstracting link; spokesman nodes carries out 'flood' treatment for information of conglomerate topology and abstracting link in route domain in next higher layer. The invention can determine transmitting capacity effectively. Each node obtains transmitting capacity of any route domain in whole network by referring spokesman node of route domain in different layer.
Owner:FENGHUO COMM SCI & TECH CO LTD
Method for gathering homologous address beam and homologous gathering network route system
ActiveCN102055817AOvercoming the "idle" problemIncrease profitData switching networksNetworked systemEngineering
The invention relates to a network communication technology, in particular to a method for gathering a homologous address beam and a homologous gathering IP (internet protocol) network system. The method comprises: definition for a homologous address related concept, a principle and method for distributing homologous addresses, a method for merging homologous address beams, an algorithm for homologous address gathering, a structure for a homologous address route, a method for generating intra-domain and inter-domain routes based on the homologous addresses, a routing table and transferring table structure using the homologous addresses as inquiry keywords, storage forms of the homologous addresses in a data message, a process for generating a host machine message, and intra-domain and inter-domain transferring processes for the data message based the homologous addresses. Compared with the classless inter-domain routing (CIRD), the invention has the advantages that the defect that CIRD cannot gather a plurality of numerically non-continuous address prefixes is overcome, no preserved 'continuous' address space is required, and the sizes of the routing table and transferring table of each route in a complete route domain are effectively reduced. The network system provided by the invention can more flexibly and better meet customer needs.
Owner:THE PLA INFORMATION ENG UNIV
Loop prevention technique for MPLS using two labels
InactiveUS7633859B2Avoid developmentOvercome disadvantagesError preventionTransmission systemsTraffic capacityRouting domain
Owner:CISCO TECH INC
Loop prevention techniques using encapsulation manipulation of IP/MPLS field
ActiveUS7477593B2Avoid developmentFast reroute (FRR)Error preventionTransmission systemsRouting domainPacket forwarding
A fast reroute (FRR) technique is implemented at the edge of a computer network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being “protected” (i.e., rerouted) data packets before they are forwarded to the backup edge device. To that end, the edge device incorporates an identifier into the rerouted data packets to indicate that the packets are being FRR rerouted. The identifier may be a predetermined value stored at a known location in the rerouted packets'encapsulation headers, such as in their MPLS or IP headers. Upon receiving a data packet containing the identifier, the backup edge device is not permitted to reroute the packet a second time.
Owner:CISCO TECH INC
Constructing a repair path in the event of failure of an inter-routing domain system link
An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.
Owner:CISCO TECH INC
Location identifier and host identifier separation-based system and mobility management method thereof
InactiveCN102075420ASolve triangular routing problemsSupport multicastData switching networksRouting domainNetworked system
The invention provides a location identifier and host identifier separation-based network system and a mobility management method thereof. The system consists of a core area CA, a routing area RA formed by an organization area OA, a routing area router (RA Router), an organization area router (OA router), a mapping server in the routing area, and various terminals. To simplify the system, functional modules of the mapping server are distributed in routers in the routing area, including the RA router and the OA router, namely a distributed Hash table is used to organize the all RA routers and OA routers in the routing area to store the mapping information between a terminal location identifier, a location identifier of the OA Router connected with the terminal currently, and a host identifier; and from the terminal perspective, the router storing the mapping information of a terminal is called a mapping router Router-M of the terminal. The invention also provides an improved mobility management method on the basis of the network, which supports mobile conversation on the basis of solving the problem of routing expansibility. Furthermore, the invention can be compatible with Internet to reduce the deployment difficulty.
Owner:BEIJING UNIV OF POSTS & TELECOMM
System and method for migrating application virtual machines in a network environment
ActiveCN103368807ACommunication securityNetworks interconnectionSoftware simulation/interpretation/emulationRouting domainVirtual switch
A method includes managing a virtual machine (VM) in a cloud extension, where the VM is part of a distributed virtual switch (DVS) of an enterprise network, abstracting an interface that is transparent to a cloud infrastructure of the cloud extension, and intercepting network traffic from the VM, where the VM can communicate securely with the enterprise network. The cloud extension comprises a nested VM container (NVC) that includes an emulator configured to enable abstracting the interface, and dual transmission control protocol / Internet Protocol stacks for supporting a first routing domain for communication with the cloud extension, and a second routing domain for communication with the enterprise network. The NVC may be agnostic with respect to operating systems running on the VM. The method further includes migrating the VM from the enterprise network to the cloud extension through suitable methods.
Owner:CISCO TECH INC
Packet switching system, packet switching method, routing apparatus, structure of packet, and packet generating method
InactiveUS20080013549A1Flexible and highly functional routingFlexible and highly functionalData switching by path configurationRouting domainStructure of Management Information
The packet switching system for transmitting and receiving a packet via a packet switching network 100, which comprises a plurality of routing tables (#0, #1, #2 . . . ), each of which has been generated by a unique routing policy, stored in the routing apparatuses deployed at the border, at the origin or at the end of the respective routing domains, an identifier (RTI) inserted in the packet to specify the routing tables, and an identifier changer to change a value of the identifier on the packet switching network 100. The routing apparatus selects one of the routing tables (#0, #1, #2 . . . ) according to the RTI in the received packet and transfers the packet to a destination that is specified by the selected routing table.
Owner:NTT DOCOMO INC
Flow labels
ActiveUS7266121B2Easy to useValid verificationError preventionTransmission systemsQuality of serviceData stream
Owner:CRYSTAL MOUNTAIN COMM LLC
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