摘要:
A method for processing multicast data packets has steps for (a) requesting a second router upstream router by a multiple-processor data router to join a multicast group, the request including identification of a single physical ingress port from a plurality of available ports for receiving the multicast data packets; (b) preparing a multicast forwarding information base (MFIB) limited to only forwarding information incorporating the identified physical ingress port, and distributing the MFIB to a client software module hosting the identified physical ingress port; (c) receiving the multicast data packets at the identified ingress port; and (d) using only the MFIB to route the received multicast data packets.
摘要:
In a communication system having a plurality of physical communication ports, a hierarchical bond communication interface has a logical interface as a component of the bond at a top level of the hierarchy, and a first subjugate logical interface at a second level of the hierarchy as a component of the top-level logical interface. The communication system has a control mechanism whereby thresholds may be set to determine up or down status of hierarchical bonds for use in communication, according to characteristics of components of the bonds.
摘要:
An apparatus and method for forwarding data on a network are described. A label-switching subnetwork within the network includes an ingress node and an egress node coupled to source and destination nodes, respectively, on the network. The ingress node sends a signal along a route within the subnetwork through a plurality of subnetwork nodes to the egress node. In response, the subnetwork nodes transmit response signals back along the route toward the ingress node which define the route through the subnetwork and simultaneously allocate a plurality of paths within the route. A single path can be selected for forwarding of data packets associated with a source/destination pair, ensuring that data packets arriving at the destination are not misaligned.
摘要:
A method and apparatus for reallocating switching circuitry in a switching fabric are disclosed. The switching fabric is used to permit data transfer among a plurality of interface units each having a plurality of data ports. The switching fabric is partitionable into a plurality of switch planes such that each switch plane can be assigned to transfer data associated with like data ports of the interface units. Each switch plane includes multiple switching channels each assignable to transfer data associated with one data port of one of the interface units, in a full implementation. The number of interface units is less than the number of switching channels in a switch plane, then the reallocation is performed such that multiple channels of at least one switch plane can be assigned to transfer data of multiple ports of at least one of the interface units. This results in switch plane channels that would otherwise be unused being utilized to transfer data. This reallocation of switch plane channels can result in the elimination of one or more switch planes from the switch fabric resulting in substantially reduced hardware complexity and cost.
摘要:
A scalable parallel packet router comprises a massively parallel computer 10 and a plurality of multiplexers 15, and is controlled by a disclosed packet routing algorithm, and a method of very high-speed packet routing. The method includes selection of an destination node by computing a hash function from source and destination addresses of a packet, so the ordering of packets is preserved.
摘要:
In a data packet router, a router fabric card for routing data packets is provided. The router fabric card comprises a plurality of ingress/egress ports, the ports connected through a switching facility for switching connection states of the port paths between individual ingress paths and individual egress paths on the fabric card, and a scheduling component for scheduling communication between ports on the fabric card. Data coming into ingress on the card is organized into individual data-packet trains, each individual train comprising data packets and inserted data denoting a starting point and an ending point of a train. The switching facility recognizes the start data and the end data of a train and switches port paths to a next-assigned connection state accordingly.
摘要:
A replaceable circuit breaker module has a housing for supporting and enclosing elements of the module, a circuit breaker mounted in the housing in a manner that an action of installing the module connects the breaker to bridge an incoming and an outgoing conductor, and monitoring circuitry for monitoring characteristics of the circuit breaker, the monitoring circuitry mounted in the housing and having a first connector element for engaging a mating connector element in the action of installing the module. The module is characterized in that action of withdrawing the circuit breaker module also withdraws the monitoring circuitry. Sensors in the monitoring circuitry may include sensors for monitoring one or more of breaker presence, on/off state of the breaker, and voltage provided to the breaker.
摘要:
A method for routing packets in a multipath network of nodes balances the loading of system resources while guaranteeing a FIFO network (i.e., First In First Out). Acyclic directed graphs based on local network information are used at each node with routing bias tables that allow for local preferences. A randomizing function may be used throughout the network to allow uniform utilization of system resources. A normalizing function may be used throughout the network to reduce bit operations in routing packets.
摘要:
A network comprises a plurality of switching nodes interconnected by communication links for transferring digital packets. At least one switching node in the network pre-establishes a bypass virtual circuit through the network to bypass an element of the network, such as a switching node or a communication link, in the network. The bypass virtual circuit defines a path to another switching node in the network. The first switching node uses the bypass virtual circuit so constructed in forwarding of a packet in the event of a failure or other malfunction of the element if the first switching node would otherwise transfer the packet over that element.
摘要:
A data structure has a list of event objects, one or more producers creating the event objects for the list, and a finite set of consumers accessing the object list. The structure is characterized in that the event objects are each associated with a first reference number indicating the number of consumers currently accessing the event object, and in that, as each consumer completes access the reference number is decremented, and when the reference number for an event object is zero, and the event object is at the head of the list, indicating that all consumers have accessed the object, that event object is removed from the list. A use of the structure for propagating route changes to nodes in a multiple-processor router, and to peer routers in a network is also taught.