摘要:
Example methods and apparatus for hierarchical bandwidth management are disclosed. An example method includes, using dual-token bucket meters (two-rate three-color meters) to meter bandwidth usage by individual microflows and associated macroflows (combinations of microflows). The dual-token bucket meters are used to locally and finally mark the packets using a three-color marking approach. In the example method, forwarding and discard decisions for packets processed using such techniques are made based on the final marking.
摘要:
Example methods and apparatus for hierarchical bandwidth management are disclosed. An example method includes, using dual-token bucket meters (two-rate three-color meters) to meter bandwidth usage by individual microflows and associated macroflows (combinations of microflows). The dual-token bucket meters are used to locally and finally mark the packets using a three-color marking approach. In the example method, forwarding and discard decisions for packets processed using such techniques are made based on the final marking.
摘要:
Methods and apparatus for dynamic load balancing using virtual link credit accounting are disclosed. An example method includes receiving, at a network device, a data packet to be communicated using an aggregation group, the aggregation group including a plurality of virtual links having a common destination. The example method further includes determining a hash value based on the packet and determining an assigned virtual link of the plurality of virtual links based on the hash value. The example method also includes reducing a number of available transmission credits for the aggregation group and reducing a number of available transmission credits for the assigned virtual link. The example method still further includes communicating the packet to another network device using the assigned virtual link.
摘要:
A system and method for hierarchical adaptive dynamic egress port and queue buffer management. Efficient utilization of buffering resources in a commodity shared memory buffer switch is key to minimizing packet loss. Efficient utilization of buffering resources is enabled through adaptive queue limits that are derived from an adaptive port limit.
摘要:
Apparatus and methods for intelligent congestion feedback are disclosed. An example apparatus includes a data interface configured to receive data packets from a source endpoint via an intermediate node. The data packets include a field indicating whether data congestion for data being sent to the destination endpoint is occurring. The example apparatus also includes a timer. The example apparatus further includes a feedback loop interface configured to selectively enable a feedback loop to the source endpoint and to transmit congestion notification (CN) messages to the source endpoint over the feedback loop. Upon receiving a data packet indicating that congestion has occurred due to the data packets from the source endpoint to the destination endpoint, the destination endpoint is configured to set the timer to a preset time value; start the timer reverse counting from the preset time value to zero, enable the feedback loop and transmit the CN messages.
摘要:
Methods and apparatus for. An example method includes determining, by a network device, respective quality metrics for each of a plurality of members of an aggregation group of the network device, the respective quality metrics representing respective data traffic loading for each member of the aggregation group. The example method further includes grouping the plurality of aggregation members into a plurality of loading/quality bands based on their respective quality metrics. The example method also includes selecting members of the aggregation group for transmitting packets from a loading/quality band corresponding with members of the aggregation group having lower data traffic loading relative to the other members of the aggregation group.
摘要:
Various aspects of a method and system for transmission control protocol (TCP) traffic smoothing are presented. Traffic smoothing may comprise a method for controlling data transmission in a communications system that further comprises scheduling the timing of transmission of information from a TCP offload engine (TOE) based on a traffic profile. Traffic smoothing may comprise transmitting information from a TOE at a rate that is either greater than, approximately equal to, or less than, the rate at which the information was generated. Some conventional network interface cards (NIC) that utilize TOEs may not provide a mechanism that enables traffic shaping. By not providing a mechanism for traffic shaping, there may be a greater probability of lost packets in the network.
摘要:
Methods and apparatus for. An example method includes determining, by a network device, respective quality metrics for each of a plurality of members of an aggregation group of the network device, the respective quality metrics representing respective data traffic loading for each member of the aggregation group. The example method further includes grouping the plurality of aggregation members into a plurality of loading/quality bands based on their respective quality metrics. The example method also includes selecting members of the aggregation group for transmitting packets from a loading/quality band corresponding with members of the aggregation group having lower data traffic loading relative to the other members of the aggregation group.
摘要:
The systems and methods described herein allow for the scaling of output-buffered switches by decoupling the data path from the control path. Some embodiment of the invention include a switch with a memory management unit (MMU), in which the MMU enqueues data packets to an egress queue at a rate that is less than the maximum ingress rate of the switch. Other embodiments include switches that employ pre-enqueue work queues, with an arbiter that selects a data packet for forwarding from one of the pre-enqueue work queues to an egress queue.
摘要:
A system and method for adjusting an energy efficient Ethernet (EEE) control policy using measured power savings. An EEE-enabled device can be designed to report EEE event data. This reported EEE event data can be used to quantify the actual EEE benefits of the EEE-enabled device, debug the EEE-enabled device, and adjust the EEE control policy.