Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the transmission of data packets being controlled by credit sent by the receiving computer to avoid causing congestion. The encapsulation module varies fields in the packets that are used by switches to determine the path to the destination, so as to distribute the load of a transfer across a plurality of paths to the receiving computer. The sending and receiving computers use per path packet delivery, loss, latency and packet trimming information to detect abnormal network behavior and submit alerts and summary statistics to a monitoring station. The monitoring station uses this information to detect network bottlenecks and other faults and to localize them to specific switches or links.

Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the transmission of data packets being controlled by credit sent by the receiving computer to avoid causing congestion. The encapsulation module varies fields in the packets that are used by switches to determine the path to the destination, so as to distribute the load of a transfer across a plurality of paths to the receiving computer. The sending and receiving computers use per path packet delivery, loss, latency and packet trimming information to detect abnormal network behavior and submit alerts and summary statistics to a monitoring station. The monitoring station uses this information to detect network bottlenecks and other faults and to localize them to specific switches or links.

Abstract: Transmissions in a data center communications network are monitored at a sending computer, the transmission of data packets being controlled by control messages sent by a receiving computer. The monitor at the sending computer measures the time that a burst of data takes to be transmitted from the sending computer to the receiving computer. Based on feedback received from the receiving computer, the monitor at the sending computer calculates one of more estimated completion times for the transmission. The estimated completion times will approximately match the measured completion time if the network is not the bottleneck for communication. When there is a mismatch between the estimated and measured completion times, this is logged and the information is used to trigger analysis to detect the reason and possible causes for the network under-performing.

Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the trans-mission of data packets being controlled by credit sent by the receiving computer. When overloaded, network switches trim the payload from packets; trimmed packets inform the receiving computer of the demands of the sending computer.

Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the transmission of data packets being controlled by credit sent by the receiving computer to avoid causing congestion. The encapsulation module varies fields in the packets that are used by switches to determine the path to the destination, so as to distribute the load of a transfer across a plurality of paths to the receiving computer. The sending and receiving computers use per path packet delivery, loss, latency and packet trimming information to detect abnormal network behavior and submit alerts and summary statistics to a monitoring station. The monitoring station uses this information to detect network bottlenecks and other faults and to localize them to specific switches or links.

Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the trans-mission of data packets being controlled by credit sent by the receiving computer. When overloaded, network switches trim the payload from packets; trimmed packets inform the receiving computer of the demands of the sending computer.

Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the transmission of data packets being controlled by credit sent by the receiving computer. When overloaded, network switches trim the payload from packets; trimmed packets inform the receiving computer of the demands of the sending computer.

Abstract: Packets in a data communications network are encapsulated by an encapsulation module on a sending computer and decapsulated on the receiver computer, the transmission of data packets being controlled by credit sent by the receiving computer. When overloaded, network switches trim the payload from packets; trimmed packets inform the receiving computer of the demands of the sending computer.