A content delivery system for delivering an audio and/or video content to a mobile terminal is deployed on top of a mobile network and includes plural edge cache servers arranged using a star or hierarchical topology. The edge cache servers are connected to respective aggregation nodes of the mobile network such that a configurable breakout function of the nodes enables routing thereto packets addressed to an anycast addressing associated with the servers. When receiving a request, from the mobile terminal, for obtaining a manifest file of the audio and/or video content, an edge cache controller of the content delivery system creates a session identifier including a unicast addressing part pointing to the controller, and redirects the mobile terminal to the anycast addressing of the servers. The servers then obtain the session identifier from the mobile terminal and use the unicast addressing contained therein to receive context information from the controller.

Systems, methods, and computer-readable media for identifying a spanning tree loop in a network environment. Spanning tree loop indicators occurring in a network environment that utilizes a spanning tree protocol are identified. The spanning tree loop indicators are correlated to identify correlated spanning tree loop indicators within the network environment. A potential spanning tree loop is recognized from a plurality of the correlated spanning tree loop indicators based on indicator types of the correlated spanning tree loop indicators. The potential spanning tree loop is remedied in the network environment in response to recognizing the potential spanning tree loop in the network environment.

Systems, methods, and computer-readable media for identifying a spanning tree loop in a network environment. Spanning tree loop indicators occurring in a network environment that utilizes a spanning tree protocol are identified. The spanning tree loop indicators are correlated to identify correlated spanning tree loop indicators within the network environment. A potential spanning tree loop is recognized from a plurality of the correlated spanning tree loop indicators based on indicator types of the correlated spanning tree loop indicators. The potential spanning tree loop is remedied in the network environment in response to recognizing the potential spanning tree loop in the network environment.

A switch is provided for routing packets in an interconnection network. The switch includes egress ports to transmit packets, and ingress ports to receive packets. The switch also includes a buffer capacity circuit configured to obtain local buffer capacity for buffers configured to buffer packets transmitted via the switch. The switch also includes a telemetry circuit configured to receive telemetry flow control units from next switches coupled to the switch. Each telemetry flow control unit corresponds to buffer capacity at a respective next switch. The switch also includes a network capacity circuit configured to compute network capacity for transmitting packets to a destination based on the telemetry flow control units and the local buffer capacity. The switch also includes a routing circuit configured to receive packets via the ingress ports, and route the packets to the destination, via the egress ports, with bandwidth proportional to the network capacity.

A switch is provided for routing packets in an interconnection network. The switch includes egress ports to transmit packets, and ingress ports to receive packets. The switch also includes a buffer capacity circuit configured to obtain local buffer capacity for buffers configured to buffer packets transmitted via the switch. The switch also includes a telemetry circuit configured to receive telemetry flow control units from next switches coupled to the switch. Each telemetry flow control unit corresponds to buffer capacity at a respective next switch. The switch also includes a network capacity circuit configured to compute network capacity for transmitting packets to a destination based on the telemetry flow control units and the local buffer capacity. The switch also includes a routing circuit configured to receive packets via the ingress ports, and route the packets to the destination, via the egress ports, with bandwidth proportional to the network capacity.

A Provider Edge (PE) node includes a plurality of ports including an inter-chassis port to a second PE node, a port connected to a root node, and one or more ports connected to leaf nodes, wherein the plurality of ports are in an Ethernet Tree (E-Tree), and wherein the root node is dual-homed to the PE node and the second PE node; switching circuitry configured to switch traffic between the plurality of ports; and circuitry configured to designate the inter-chassis port as one of a leaf node and a root node in the E-Tree instance, and manage a designation of the inter-chassis port based on a status of the port connected to the root node. The designation is changed in a data plane instead of in a control plane.

A Provider Edge (PE) node includes a plurality of ports including an inter-chassis port to a second PE node, a port connected to a root node, and one or more ports connected to leaf nodes, wherein the plurality of ports are in an Ethernet Tree (E-Tree), and wherein the root node is dual-homed to the PE node and the second PE node; switching circuitry configured to switch traffic between the plurality of ports; and circuitry configured to designate the inter-chassis port as one of a leaf node and a root node in the E-Tree instance, and manage a designation of the inter-chassis port based on a status of the port connected to the root node. The designation is changed in a data plane instead of in a control plane.

A transfer device includes: a frame information acquisition unit configured to monitor downstream frames between host devices and OLTs and calculate a statistical value of the downstream frames per a fixed cycle; a frame storage unit configured to store the downstream frames in a plurality of queues; a frame sorting unit configured to input the downstream frames to the queues; and a distribution control unit configured to determine the number of frames to be sequentially input to the queues and increase the number of distributed frames of at least one of the host devices input to an OLT, the OLT having a smaller value of a total number of frames input from all the host devices than a maximum number of rounded frames obtained by dividing a value of a total number of frames input until the frames of all the host devices take turns around the plurality of queues by the number of OLTs. As a result, a delay requirement can be satisfied while a memory size of the queue and power consumption required for the frame sorting process are reduced.

Some embodiments provide a method for network management and control system that manages one or more logical networks. From a first user, the method receives a definition of one or more security zones for a logical network. Each security zone definition includes a set of security rules for data compute nodes (DCNs) assigned to the security zone. From a second user, the method receives a definition of an application to be deployed in the logical network. The application definition specifies a set of requirements. Based on the specified set of requirements, the method assigns DCNs implementing the application to one or more of the security zones for the logical network.

A computing system may use redundant communication pathways for communicating surgical imaging feed(s). The computing system may obtain multiple surgical video streams via multiple pathways. The multiple surgical video streams may include copies of the same video. The surgical video streams may be obtained, for example, from the same intra-body imaging feed, such as intra-body visual light feed. For example, a first video stream may be obtained via a communication pathway, and a second video stream may be obtained via another communication pathway. The computing system may display or send a surgical video stream for display. The computing system may whether the video stream being displayed has encountered any issues. Upon detecting an issue with the video stream being displayed, the computing system may display or send another obtained surgical video stream for display.