Example methods and systems for logical overlay tunnel selection are described. One example may involve a first computer system generating and sending probe packets over multiple logical overlay tunnels and configuring routing information associated with a destination based on a comparison between tunnel state information measured using the probe packets and a desired state. In response to detecting an egress packet that is destined for the destination, the first computer system may select a first logical overlay tunnel that satisfies the desired state over a second logical overlay tunnel that does not satisfy the desired state. An encapsulated packet is then generated and sent over the first logical overlay tunnel to reach the destination. The encapsulated packet may include the egress packet and an outer header that is addressed from a first virtual tunnel endpoint (VTEP) on the first computer system and a second VTEP on a second computer system.

A method and system for providing robust streaming of data from a multi-core die is disclosed. The techniques include using a high bandwidth memory (HBM) device as retransmit buffers for large amounts of data to ensure robust communication in relatively high round trip-transmission time (RTT) transmission. Another technique is supporting two or more Ethernet ports between components to both transmit the same data packets on the two ports to insure robustness. Another technique is to use sequence numbers and send data packets from the different ports in a round robin fashion and reorder the packets upon receipt of an external device. Another technique is dynamically adding and removing paths for data packets between devices with multiple ports based on the quality of the path.

A method may include obtaining a topology of an optical network. The topology may indicate multiple optical links within the optical network. The method may also include obtaining a routing metric for each of the optical links. The routing metric may be used in selecting routes through the optical network along the multiple optical links. The method may further include obtaining a signal noise tolerance of an optical signal to be routed through the optical network and adjusting routing metrics of one or more of the multiple optical links based on the signal noise tolerance of the optical signal. The method may also include after the routing metrics of the one or more of the multiple optical links are adjusted, determining a route for the optical signal through the optical network along two or more of the multiple optical links based on the routing metrics of the multiple optical links.

A communication system includes: a management server that receives, from an information terminal connectable to a first network, a connection request for connecting to a web service provided by a web server connectable to a second network; first communication control circuitry that controls communication of a communication apparatus connectable to the second network, and second communication control circuitry that controls communication of the information terminal. The first communication control circuitry connects to a relay server that relays communication between the second network and the first network. The second communication control circuitry connects the information terminal to the relay server. A request for the web service provided by the web server and a response to the request are transmitted and received between a web browser of the information terminal and the web server via the relay server and the first communication control circuitry.

Determined is a topology of a communication network composed of a plurality of nodes connected or not respectively to at least one item of equipment, one of the nodes, referred to as the root node, being connected to an external network. A service class is determined for each node, from each node, information is obtained representing the quality of the link between the node and other nodes, for each link, parameters representing the quality of the link are calculated, the nodes are classified according to the service class thereof and according to the number of links making up the path that separates them from the root node, for each node and according to the classification, the possible paths connecting the node to the root node are determined, a score is calculated for each path determined, the path is selected for the node having the best score.

A method (50) of and an arrangement for communicating, by a server, with a target node device in a network of operatively interconnected node devices, wherein each node device of the network comprises a first communication interface for direct wireless communication with the server, and a second communication interface for inter-node device communication. The server determines (51) a current communication status of a target node device based on a last received uplink message of the target node device, prior to initiating message exchange with the target node device. The server then may communicate directly (52) with the target node device via the first communication interface, or via at least one other or delegate node device of the network selected by the server (53).

The present disclosure provides a path computation method, a non-transitory storage medium, and an electronic apparatus. The path computation method includes: sending a path computation request (PCReq) message to a path computation element (PCE), wherein the PCReq message carries a constraint condition ID including at least one of a protocol ID, a multi-topology ID, a network slice ID, an application ID, or a traffic engineering (TE) target ID, and the PCReq message is configured to instruct the PCE to compute a TE path according to the constraint condition ID; and receiving a path computation reply (PCRep) message returned from the PCE, wherein the PCRep message carries the TE path.

A packet routing method includes computing, for a source node in the data network and a destination node in the data network, a set of multiple routes providing a set of shortest routes from the source to the destination that satisfy all the truth assignments for the Boolean algebra available from the path in the network. The method selects, for a packet flow, a route where logical conjunction of the policy constraints of the flow and the route is satisfied and where the route has sufficient bandwidth.

A method routes packets from a source to a destination across an IP network having a plurality of nodes (including the source and destination), and a plurality of network segments interconnecting the plurality of nodes. The source and destination are configured to use a given service. To those ends, the method receives information relating to the given service, and forms a path between the source and the destination. The path includes a) at least one intermediate node between the source and the destination and b) a plurality of specific network segments extending from the source to the destination. The plurality of specific network segments are a sub-set of the plurality of network segments. To form the path, the method assigns the plurality of specific network segments to the network path between the source and the destination as a function of the information relating to the given service.

A method may include obtaining a topology of an optical network. The topology may indicate multiple optical links within the optical network. The method may also include determining a signal noise tolerance for each of multiple optical signal types supported by the optical network and obtaining an optical noise for each of the multiple optical links. The method may also include determining a number of the multiple optical signal types that each of the multiple optical links is able to support based on the optical noise for each of the optical links and the signal noise tolerance for each of the multiple optical signal types and ranking the multiple optical links based on the number of the multiple optical signal types that each of the optical links is able to support.