A method is provided of detecting packet error during a transmission of a flit along a path from a source node through one or more intermediate nodes to a destination node. The method includes identifying a stalled node, from among the source and intermediate nodes, which prevents the transmission of the flit. The method includes generating, by a transmitter of the stalled node, a CRC for the flit and placing the CRC in an IDLE pattern of the flit. The method includes checking, by a receiver of an intermediate node subsequent to the stalled node, the CRC for the flit. The method includes sending, by a transmitter of the intermediate node, an error code to the destination node, and releasing the nodes from the intermediate node to and including the destination node, responsive to a detection, by the intermediate node, of an error in the CRC for the flit.

A slice changing device is disclosed including a circuitry configured to acquire, in a case where a condition for changing a slice is satisfied, a connection destination of a slice after change. The circuitry is further configured to notify a communication device that connects a terminal using a slice and a connection destination of a slice of the acquired connection destination, and to release a resource relating to a slice before change after notification by the notifying means, where a service which is used by the terminal is allocated to a slice, and in a case where a condition in which the slice is changed is satisfied, the service is allocated to a slice after change.

The present invention provides a method and apparatus to route data packets across a torus or higher radix topology that has low latency, increased throughput and traffic distribution to avoid hot spots development. Disclosed is a method of routing packets in a distributed direct interconnect network from a source node to a destination node comprising the steps of: discovering all nodes and associated ports; updating the database to include the nodes and ports in the network topology; calculating the shortest path from every output port on each node to every other node in the topology; segmenting each packet into flits at the output port of the source node; as the flits are segmented, distributing said flits along the shortest path from each output port on the source node to the destination node using wormhole switching, whereby the packets are distributed along alternate maximum disjoint routes in the network topology; and re-assembling and re-ordering the packets at the destination node so that the packets accord with their original order/form.

Systems and techniques are described for a path maximum transmission unit (MTU) discovery method that allows the sender of IP packets to discover the MTU of packets that it is sending over a conduit to a given destination. The MTU is the largest packet that can be sent through the network along a path without requiring fragmentation. The path MTU discovery method actively probes each sending path of each conduit with fragmentation enabled to determine a current MTU and accordingly increase or decrease the conduit MTU. The path MTU discovery process is resilient to errors and supports retransmission if packets are lost in the discovery process. The path MTU discovery process is dynamically adjusted at a periodic rate to adjust to varying network conditions.

A network component placement architecture addresses the difficult technical challenge of determining where specific technical components of an overall service may be provisioned. However, the placement decision can change over time in response to complex updates relating to service providers, the regions they support, the assets they support, and many other dynamic factors. Dynamic network component placement effectively determines updated possibilities for placing the technical components of a specified service, while meeting all of the applicable technical constraints on the placement of the technical components.

Provisioning resources into the cloud is a constantly increasing technical challenge as more cloud service providers emerge, each offering disparate computing platforms, services, assets, supported technical components, and other features. A cloud computing provisioning architecture implements a sequence of complex technical analyzes that successfully provisions complex cloud computing services.

The present invention provides a method and apparatus to route data packets across a torus or higher radix topology that has low latency, increased throughput and traffic distribution to avoid hot spots development. Disclosed is a method of routing packets in a distributed direct interconnect network from a source node to a destination node comprising the steps of: discovering all nodes and associated ports; updating the database to include the nodes and ports in the network topology; calculating the shortest path from every output port on each node to every other node in the topology; segmenting each packet into flits at the output port of the source node; as the flits are segmented, distributing said flits along the shortest path from each output port on the source node to the destination node using wormhole switching, whereby the packets are distributed along alternate maximum disjoint routes in the network topology; and re-assembling and re-ordering the packets at the destination node so that the packets accord with their original order/form.

A communication management list generation device 20 generates a communication management list composed of communication management information including time of day information corresponding to a prescribed time of day and communication information indicating a communication process started at a prescribed time of day and not using the same path at the same time. The communication management list generation device is provided with: a determination means 21 for determining, regarding whether information on the communication process can be added to the communication information, each communication management information in descending order of time (early time first) corresponding to the time of day information; and an addition means 22 for adding information on the communication process to the communication information of the communication management information determined at a stage at which it was determined by the determination means 21 that addition is possible.

A method is provided of detecting packet error during a transmission of a flit along a path from a source node through one or more intermediate nodes to a destination node. The method includes identifying a stalled node, from among the source and intermediate nodes, which prevents the transmission of the flit. The method includes generating, by a transmitter of the stalled node, a CRC for the flit and placing the CRC in an IDLE pattern of the flit. The method includes checking, by a receiver of an intermediate node subsequent to the stalled node, the CRC for the flit. The method includes sending, by a transmitter of the intermediate node, an error code to the destination node, and releasing the nodes from the intermediate node to and including the destination node, responsive to a detection, by the intermediate node, of an error in the CRC for the flit.

A method is provided of detecting packet error during a transmission of a flit along a path from a source node through one or more intermediate nodes to a destination node. The method includes identifying a stalled node, from among the source and intermediate nodes, which prevents the transmission of the flit. The method includes generating, by a transmitter of the stalled node, a CRC for the flit and placing the CRC in an IDLE pattern of the flit. The method includes checking, by a receiver of an intermediate node subsequent to the stalled node, the CRC for the flit. The method includes sending, by a transmitter of the intermediate node, an error code to the destination node, and releasing the nodes from the intermediate node to and including the destination node, responsive to a detection, by the intermediate node, of an error in the CRC for the flit.