A method for handling of multicast data streams within a broadband access network of a telecommunications network includes: a specific service edge node receiving a join request message from or through a specific customer premises equipment; an activation request message being transmitted, by the specific service edge node, to a multicast controller node within the broadband access network; and the multicast controller node generating and/or replicating multicast data stream-related data packets and injecting these multicast data stream-related data packets, using a corresponding session identifier information, into a point-to-point-protocol connection or tunneling protocol connection between the specific service edge node and the specific customer premises equipment.

A network system for a data center is described in which a switch fabric may provide full mesh interconnectivity such that any servers may communicate packet data to any other of the servers using any of a number of parallel data paths. Moreover, according to the techniques described herein, edge-positioned access nodes, optical permutation devices and core switches of the switch fabric may be configured and arranged in a way such that the parallel data paths provide single L2/L3 hop, full mesh interconnections between any pairwise combination of the access nodes, even in massive data centers having tens of thousands of servers. The plurality of optical permutation devices permute communications across the optical ports based on wavelength so as to provide, in some cases, full-mesh optical connectivity between edge-facing ports and core-facing ports.

A RF router for routing n input signals to m destinations, where the router comprises a backplane coupled to a plurality of RF input terminals, a plurality of RF output terminals, a plurality of splitters and a plurality of connectors. The backplane is also coupled to a controller and a plurality of connectors for receiving a plurality of switching matrices. The RF router comprises a plurality of uv input switch matrices, a plurality of pq intermediate switch matrices and a plurality of rs output switch matrices, where at least one of the plurality of uv input switch matrices, the plurality of pq intermediate switch matrices and the plurality of rs output switch matrices are redundant.

The ability to efficiently and reliably transmit, route and receive data across telecommunication networks is essential for existing and evolving applications where connectivity to these networks is a ubiquitous aspect of society today. However, limitations in existing telecommunication networks impact this through performance, cost, and speed. To address this the inventor has established improvements with respect to routing (switching), processing, and monitoring. For routing low latency switch architectures for improving packet-based data switching are described. For processing digital optical logic devices and digital optical processing structures for enhanced functionality and processing within optical telecommunication networks are described. For monitoring improved optical connectors which provide embedded monitoring and analytical functionality for improved management of optical telecommunication networks are described.

Communication network systems are disclosed. In one or more implementations, the communication network system includes a plurality of network devices. Each of the plurality of network devices incorporates one or more multi-port switches, where each multi-port switch includes a connection to the network device incorporating the multi-port switch and a connection to at least one other port of another multi-port switch incorporated by another respective one of the plurality of network devices.

A system and method of transferring cells through a switch fabric having a shared memory crossbar switch, a plurality of cell receive blocks and a plurality of cell transmit blocks. The system determines, based on a number of cells queued up in respective output buffers in the cell transmit blocks, output buffers in the cell transmit blocks that can receive cells on a low latency path. The cells transferred include first cells that can be transferred on the low latency path and second cells that cannot be transferred via the low latency path. The first cells are transferred via a bypass mechanism in shared memory to the output buffers. The second cells are transferred by writing the second cells to shared memory, reading the second cells from shared memory and transferring the second cells read from shared memory to the output buffers in the cell transmit blocks.

An information processing apparatus includes a memory; and a processor coupled to the memory and the processor configured to exclude a combination for satisfying a condition from multiple combinations each including a number of shifts of multiple switch layers in a fat-tree network using Latin square, create relay settings for multiple switches for performing communication through multiple communication paths corresponding to remain combinations except the combination excluded from the multiple combinations, and transmit correspondingly the created relay settings to the multiple switches.

Systems and Methods for switching optical data units (ODUs) and Internet Protocol (IP) packets as Ethernet packets in an optical transport network (OTN), IP, and Ethernet switching system. The OTN, IP, and Ethernet switching system may include an Ethernet fabric having a set of M Ethernet switches each including a set of N switch ports, and a set of N input/output (IO) devices each including a set of W IO ports, a set of M Ethernet ports, an IO side packet processor (IOSP), and a fabric side packet processor (FSP). Each Ethernet switch may establish switch queues. Each IO device may establish a set of M hierarchical virtual output queues each including a set of N ingress-IOSP queues and ingress-virtual output queues, a set of W egress-IOSP queues, a set of M ingress-FSP queues, and a set of N hierarchical virtual input queues each including a set of N egress-FSP queues and egress-virtual input queues.

A RF router for routing n input signals to m destinations, where the router comprises a backplane coupled to a plurality of RF input terminals, a plurality of RF output terminals, a plurality of splitters and a plurality of connectors. The backplane is also coupled to a controller and a plurality of connectors for receiving a plurality of switching matrices. The RF router comprises a plurality of uv input switch matrices, a plurality of pq intermediate switch matrices and a plurality of rs output switch matrices, where at least one of the plurality of uv input switch matrices, the plurality of pq intermediate switch matrices and the plurality of rs output switch matrices are redundant.

In some examples, a switching system includes a plurality of fabric endpoints and a multi-stage switching fabric having a plurality of fabric planes each having a plurality of stages to switch data units between any of the plurality of fabric endpoints. A fabric endpoint of the fabric endpoints is configured to send, to a switch of a first one of the stages and within a first fabric plane of the plurality of fabric planes, a self-ping message destined for the fabric endpoint. The fabric endpoint is configured to send, in response to determining the fabric endpoint has not received the self-ping message after a predetermined time, an indication of a connectivity fault for the first fabric plane.