In one example, a plurality of network devices forming an Internet protocol (IP) fabric includes first, second, third, and fourth network devices. The first network device includes a plurality of network interfaces communicatively coupled to at least the third and fourth network devices of the plurality of network devices, which are between the first network device and the second network device. The first network device also includes one or more hardware-based processors configured to determine available bandwidths for the third network device and the fourth network device toward the second network device, determine a ratio between the available bandwidths for the third and fourth network devices, and forward data (e.g., packets or bytes) toward the second network device such that a ratio between amounts of the data forwarded to the third and fourth network devices corresponds to the ratio between the available bandwidths.

A method includes identifying within a network topology, by an apparatus, a plurality of network devices; and establishing by the apparatus, a multiple tree topology comprising a first multicast tree and a second multicast tree, the first and second multicast trees operable as redundant trees for multicast traffic in the network topology, the establishing including: allocating a first of the network devices as a corresponding root of the first multicast tree, allocating a first group of intermediate devices from the network devices as first forwarding devices in the first multicast tree, allocating a second group of intermediate devices as belonging to first leaf devices in the first multicast tree, and allocating terminal devices of the network devices as belonging to the first leaf devices, and allocating a second of the network devices as the corresponding root of the second multicast tree, allocating the second group of intermediate devices as second forwarding devices in the second multicast tree, allocating the first group of intermediate devices as belonging to second leaf devices in the second multicast tree, and allocating the terminal devices as belonging to the second leaf devices.

The invention relates to a method for transmitting data via a communications channel (106), in which the data is transmitted with a transmission frame, wherein the transmission frame has at least one prioritisation field (PCP) for establishing the priority of the message and a data field, wherein the prioritisation field (PCP) functions to control the bus access by prioritising the messages. For this purpose, a bus access controller is used, in which the priority of at least the last received data packet is stored in a minimum priority storage cell (330). After receiving a data packet, a timer (320) is started, for which a timeout value is set, which is reset when a following packet is received. After reaching the timeout value, a decrementing of the value stored in the minimum priority storage cell (330) occurs. Thereafter, for the purpose of bus access control, when sending a packet, it is checked whether the priority of the packet to be sent is lower than the value stored in the minimum priority storage cell (330), and the sending of the data packet is prevented if the priority of the packet is lower than the value stored in the minimum priority storage cell (330).

Embodiments for providing enhanced multicast data transfer for ring topology based artificial intelligence systems are disclosed. Multicast data is sent to a plurality of disjointed cores in a multicast group according to a first multicast mode, a second multicast mode, or a third multicast mode, where the first multicast mode sends a first half the multicast data on first multicast ring and a second half on a second multicast ring, the second multicast mode sends the multicast data on either the first multicast ring or the second multicast ring, and the third multicast mode replicates the multicast data and sends the multicast data to both the first multicast ring and the second multicast ring.

Embodiments for providing enhanced multicast data transfer for ring topology based artificial intelligence systems are disclosed. Multicast data is sent to a plurality of disjointed cores in a multicast group according to a first multicast mode, a second multicast mode, or a third multicast mode, where the first multicast mode sends a first half the multicast data on first multicast ring and a second half on a second multicast ring, the second multicast mode sends the multicast data on either the first multicast ring or the second multicast ring, and the third multicast mode replicates the multicast data and sends the multicast data to both the first multicast ring and the second multicast ring.

In one embodiment, a method comprises causing, by an apparatus, establishment of first and second multicast trees within one or more underlay switching fabrics of one or more fat tree topologies, the first and second multicast trees comprising first and second multicast roots for multicast transmission to leaf network devices in the respective first and second multicast trees; causing, by the apparatus, establishment of an overlay tunnel between the first and second multicast roots, the overlay tunnel independent and distinct from the first and second multicast trees; causing the first multicast root to multicast transmit, via the first multicast tree, a data packet having been transmitted to the first multicast root; and causing the first multicast root to unicast transmit the data packet to the second multicast root via the overlay tunnel, for multicast transmission of the data packet by the second multicast root via the second multicast tree.

In one embodiment, a method comprises identifying a fat tree network topology comprising top-of-fabric (ToF) switching devices, an intermediate layer of intermediate switching devices connected to each of the ToF switching devices, and a layer of leaf network devices; and causing a first leaf network device to initiate establishment of first and second redundant multicast trees for multicasting of data packets, including: causing first and second ToF switching devices to operate as roots of the first and second multicast trees according to first and second attribute types, respectively, causing the first leaf network device to select first and second of the intermediate switching devices as first and second flooding relays belonging to the first and second attribute types, respectively, and causing the first and second flooding relays to limit propagation of registration messages generated by the first leaf network device to the first and second ToF switching devices, respectively.

A cellular system and method to provide voice and data services to a user terminal are disclosed. The cellular system includes a cellular base station; a satellite backhaul including a first satellite link and a second satellite link; and a traffic classifier to classify traffic from the cellular base station as voice traffic for transportation via the first satellite link and as data traffic for transportation via the second satellite link.

The invention relates to a method for transmitting data via a communications channel (106), in which the data is transmitted with a transmission frame, wherein the transmission frame has at least one prioritisation field (PCP) for establishing the priority of the message and a data field, wherein the prioritisation field (PCP) functions to control the bus access by prioritising the messages. For this purpose, a bus access controller is used, in which the priority of at least the last received data packet is stored in a minimum priority storage cell (330). After receiving a data packet, a timer (320) is started, for which a timeout value is set, which is reset when a following packet is received. After reaching the timeout value, a decrementing of the value stored in the minimum priority storage cell (330) occurs. Thereafter. for the purpose of bus access control, when sending a packet, it is checked whether the priority of the packet to be sent is lower titan the value stored in iltc minimum priority storage cell ((330). and the sending of the data packet is prev ented if the priority of the packet is lower titan the value stored in the minimum priority storage cell ((330).

In one embodiment, a method comprises identifying within a network topology, by an apparatus, a plurality of network devices; and establishing by the apparatus, a multiple tree topology comprising a first multicast tree and a second multicast tree, the first and second multicast trees operable as redundant trees for multicast traffic in the network topology, the establishing including: allocating a first of the network devices as a corresponding root of the first multicast tree, allocating a first group of intermediate devices from the network devices as first forwarding devices in the first multicast tree, allocating a second group of intermediate devices as belonging to first leaf devices in the first multicast tree, and allocating terminal devices of the network devices as belonging to the first leaf devices, and allocating a second of the network devices as the corresponding root of the second multicast tree, allocating the second group of intermediate devices as second forwarding devices in the second multicast tree, allocating the first group of intermediate devices as belonging to second leaf devices in the second multicast tree, and allocating the terminal devices as belonging to the second leaf devices.