US 10,097,462 B2 · Throughput resilience during link failover

Abstract

Techniques disclosed herein provide an approach for providing throughput resilience during link failover when links are aggregated in a link aggregation group (LAG). In one embodiment, failure of a link in the LAG may be detected, and a Transmission Control Protocol/Interact Protocol (TCP/IP) stack notified to ignore packet losses and not perform network congestion avoidance procedure(s) for one round-trip timeout (RTO) period. In a virtualized system in particular, a virtual switch may be configured to generate events in response to detected link failures and notify TCP/IP stacks of a hypervisor and/or virtual machines (VMs) of the link failures. In turn, the notified TCP/IP stacks of the hypervisor and/or VMs may ignore packet losses and not perform network congestion avoidance procedure(s) for one RTO period.

Claims20

Dependent claims

A method for providing throughput resilience during link failover, comprising:

determining by a protocol layer originating at least one packet flow on a link in an aggregation of links that the link has failed, wherein the at least one packet flow on the failed link is transferred to one or more other links in the aggregation of links that are active;
and
disabling one or more network congestion avoidance procedures that reduce throughput of the at least one packet flow by the protocol layer on the at least one packet flow for a period of time by causing the one or more network congestion avoidance procedures to ignore packet losses of the at least one packet flow during the period of time.

Dependencies are inferred from the claim text.

Throughput resilience during link failover

Life of this patent

Throughput resilience during link failover

Life of this patent

Abstract

Claims20