Patent application number | Description | Published |
20100088437 | INFINIBAND ADAPTIVE CONGESTION CONTROL ADAPTIVE MARKING RATE - A device and a method for optimizing data transfer rate in an InfiniBand fabric is provided where a various number of transmitting devices aim data packets to a single receiving device or through a common link. The method which is implemented in an InfiniBand switch includes marking of packets in a rate corresponding to centrally configured marking rate, determination of the current number of data flows between the input ports and the output port of the switch and marking the data packet with Forward Explicit Congestion Notification according to an adaptive value of marking rate which depends on the initial value of the marking rate and is inversely proportional to the number of data flows. | 04-08-2010 |
20120207018 | REDUCING POWER CONSUMPTION IN A FAT-TREE NETWORK - A method for communication includes estimating a characteristic of communication traffic to be carried by a fat-tree network. Responsively to the estimated characteristic, a subset of the spine switches in the highest level of the network is selected, according to a predetermined selection order, to be active in carrying the communication traffic. In each of the levels of the spine switches below the highest level, the spine switches to be active are selected based on the selected spine switches in a next-higher level. The network is operated so as to convey the traffic between the leaf switches via the active spine switches, while the spine switches that are not selected remain inactive. | 08-16-2012 |
20120300669 | TOPOLOGY-BASED CONSOLIDATION OF LINK STATE INFORMATION - A method in a network element that forwards packets to destination nodes includes identifying groups of the destination nodes. Respective performance metrics of multiple different candidate network paths, over which the destination nodes in a given group are reachable from the network element, are estimated jointly for all the destination nodes in the given group. A network path is selected from among the candidate network paths based on the estimated performance metrics. The packets addressed to the destination nodes in the given group are forwarded over the selected network path. | 11-29-2012 |
20130135999 | DESTINATION-BASED CONGESTION CONTROL - A method for communication includes sending communication packets over a network from a first network interface. A notification, which originates from a second network interface and indicates a network congestion encountered by one or more of the packets, is received in the first network interface. A network address of the second network interface is identified based on the notification. A transmission rate of subsequent packets addressed to the network address is regulated responsively to the notification, irrespective of a transport service instance on which the subsequent packets are sent from the first network interface. | 05-30-2013 |
20140023084 | REDUCING POWER CONSUMPTION IN A FAT-TREE NETWORK - A method for communication includes configuring a multi-level fat-tree network to include at least three levels of switches, including multiple modules arranged externally in a tree topology. Each module contains a respective group of the switches arranged in an internal tree extending over at least two of the levels of the network. A subset of the modules is selected to be active in carrying the communication traffic. The network is operated so as to convey communication traffic among the switches via the active modules, while the modules that are not in the selected subset remain inactive. | 01-23-2014 |
20140177639 | ROUTING CONTROLLED BY SUBNET MANAGERS - A method for communication in a packet data network that includes at least first and second subnets interconnected by multiple routers and having respective first and second subnet managers. The method includes assigning respective local identifiers to ports for addressing of data link traffic within each subnet, such that the first subnet manager assigns the local identifiers in the first subnet, and the second subnet manager assigns the local identifiers in the second subnet. The routers are configured by transmitting and receiving control traffic between the subnet managers and the routers. Data packets are transmitted between network nodes in the first and second subnets via one or more of the configured routers under control of the subnet managers. | 06-26-2014 |
20140211631 | ADAPTIVE ROUTING USING INTER-SWITCH NOTIFICATIONS - A method includes receiving in a network switch of a communication network communication traffic that originates from a source node and arrives over a route through the communication network traversing one or more preceding network switches, for forwarding to a destination node. In response to detecting in the network switch a compromised ability to forward the communication traffic to the destination node, a notification is sent to the preceding network switches. The notification is to be consumed by the preceding network switches and requests the preceding network switches to modify the route so as not to traverse the network switch. | 07-31-2014 |
20150195204 | ADAPTIVE ROUTING USING INTER-SWITCH NOTIFICATIONS - A method includes receiving in a network switch of a communication network communication traffic that originates from a source node and arrives over a route through the communication network traversing one or more preceding network switches, for forwarding to a destination node. In response to detecting in the network switch a compromised ability to forward the communication traffic to the destination node, a notification is sent to the preceding network switches. The notification is to be consumed by the preceding network switches and requests the preceding network switches to modify the route so as not to traverse the network switch. | 07-09-2015 |