Hardware of a network switching device supports quantized congestion notification (QCN) to notify senders of network packets received at the network switching device that the network switching device is experiencing congestion. The hardware is instead programmed to notify a processor of the network switching device of the congestion at an egress queue of the network switching device. The processor receives a congestion notification message (CNM) from the hardware that the hardware has detected the congestion at the egress queue. Responsive to receiving the CNM from the hardware, the processor detects a microburst of the network packets at the egress queue of the network switching device.

A network device implementing the subject system for end to end flow control may include at least one processor circuit that may be configured to detect that congestion is being experienced by at least one queue of a port and identify another network device that is transmitting downstream traffic being queued at the at least one queue of the port that is at least partially causing the congestion. The at least one processor circuit may be further configured to generate an end to end flow control message that comprises an identifier of the port, the end to end flow control message indicating that the downstream traffic should be flow controlled at the another network device. The at least one processor circuit may be further configured to transmit, out-of-band and through at least one intermediary network device, the end to end flow control message to the another network device.

A system for admission and flow control is disclosed. In some embodiments, the system includes a switch for routing network traffic, having multiple classes of service (CoSs), from multiple ingress ports to one or more of multiple egress ports. The system also includes multiple ingress-level class of service queues (InCoS-Qs) and one or more egress-level class of service queues (EgCoS-Qs), each InCoS-Q and EgCoS-Q corresponding to one of CoSs. The switch is configured to detect congestion in a particular EgCoS-Q, corresponding to a particular CoS, the particular EgCoS-Q being associated with a particular host; identify an InCoS-Q corresponding to that particular CoS, and associated with that particular host; and block that InCoS-Q, while allowing routing of the network traffic from one or more InCoS-Qs corresponding to that particular CoS, the one or more InCoS-Qs corresponding to one or more other hosts.

A stream switch includes a data router, configuration registers, and arbitration logic. The data router has a plurality of input ports, each having a plurality of associated virtual input channels, and a plurality of output ports, each having a plurality of associated virtual output channels. The data router transmits data streams from input ports to one or more output ports of the plurality of output ports. The configuration registers store configuration data associated with the virtual output channels of the respective output ports of the plurality of output ports. The stored configuration data identifies a source input port and virtual input channel ID associated with the virtual output channel of the output port. The arbitration logic allocates bandwidth of the data router based on request signals associated with virtual input channels of the input ports and the configuration data associated with the virtual output channels.

A router configured to implement Border Gateway Protocol (BGP) includes circuitry configured to receive BGP updates from one or more BGP peers connected to the router, detect a trigger related to BGP updates where the trigger is indicative of a need to apply backpressure by the one or more BGP peers, and send a backpressure notification message to the one or more BGP peers based on the trigger, such that the one or more BGP peers apply the backpressure. The circuitry can be further configured to monitor one or more criteria associated with operation of the router, for the trigger.

A network device implementing the subject system for end to end flow control may include at least one processor circuit that may be configured to detect that congestion is being experienced by at least one queue of a port and identify another network device that is transmitting downstream traffic being queued at the at least one queue of the port that is at least partially causing the congestion. The at least one processor circuit may be further configured to generate an end to end flow control message that comprises an identifier of the port, the end to end flow control message indicating that the downstream traffic should be flow controlled at the another network device. The at least one processor circuit may be further configured to transmit, out-of-band and through at least one intermediary network device, the end to end flow control message to the another network device.

A message flow shaping approach for a network element capable of message routing is presented. The network element is configured to receive one or more logical ingress message flows and to output one or more logical egress message flows, wherein a flow priority level is allocated to each ingress and egress message flow. A method implementation of the technique presented herein comprises the step of the determining a message flow congestion state per flow priority level at an egress side of the network element. The method further comprises the step of triggering a message flow shaping operation. The message flow shaping operation is triggered per flow priority level at an ingress side of the network element dependent on the congestion state determined for at least one associated flow priority level at the egress side.

A switching device in a network system for transferring data includes one or more source line cards, one or more destination line cards and a switching fabric coupled to the source line cards and the destination line cards to enable data communication between any source line card and destination line card. Each source line card includes a request generator to generate a request signal to be transmitted in order to obtain an authorization to transmit data. Each destination line card includes a grant generator to generate and send back a grant signal to the source line card in response to the request signal received at the destination line card to authorize the source line card to transmit a data cell to the destination line card.

A filter method for adapting a computing load to a computing capacity of a car-to-x communication system, in which method car-to-x messages are received and/or sent using the car-to-x communication system and the received car-to-x messages require processing by the car-to-x communication system. The filter method decides which of the received car-to-x messages to process and which of the received car-to-x messages to discard.

A backplane module for coupling a plurality of function modules, includes a base body, a network coupling element arranged within the base body, at least one first connection device arranged on the base body for coupling a function module, the at least one first connection device having at least one communication interface connected to a port of the network coupling element via a signal line, and at least one second connection device arranged on the base body for coupling a function module, the at least one second connection device having at least two communication interfaces, each of which is connected to one of the ports of the network coupling element via a respective separate signal line, which together can form a logical transmission channel.