公开(公告)号：US12074799B2

公开(公告)日：2024-08-27

申请号：US16809013

申请日：2020-03-04

Applicant: Intel Corporation

Inventor： Arvind Srinivasan ,  Malek Musleh ,  Allister Alemania ,  Roberto Penaranda Cebrian

IPC: H04L47/11 ,  H04L43/106 ,  H04L45/00 ,  H04L45/28 ,  H04L45/60 ,  H04L47/122 ,  H04L47/32 ,  H04L49/00

CPC classification number: H04L47/115 ,  H04L43/106 ,  H04L45/22 ,  H04L45/28 ,  H04L45/60 ,  H04L47/122 ,  H04L47/323 ,  H04L49/70

Abstract: Methods for improving end-to-end congestion reaction using adaptive routing and congestion-hint based throttling for IP-routed datacenter networks and associated apparatus. In connection with forwarding packets between sending and receiving endpoints coupled to one or more networks, one or more network switches are configured to detect current or approaching congestion conditions, generate congestion notification packets (CNPs), and return the CNPs to sending endpoints. The CNPs may be routed using one or more adaptive routing mechanisms to forward the CNPs along non-congested paths or may be forwarded along a fastest path to a sender. The CNPs further may comprise meta-data including a flow identifier associated with a packet sent from an endpoint, a congestion level for the flow, and a timestamp. CNPs may comprise unreliable datagrams that may be received out-of-order, with the timestamps being used to determine whether CNPs should be disregarded at a switch along the forwarding path to the sending endpoint or at the sending endpoint. Endpoint network interfaces implement a congestion-CNP table storing entries associating congested flows with congestion levels.

公开(公告)号：US12224940B2

公开(公告)日：2025-02-11

申请号：US17514615

申请日：2021-10-29

Applicant: Intel Corporation

Inventor： Malek Musleh ,  Gene Wu ,  Anupama Kurpad ,  Allister Alemania ,  Roberto Penaranda Cebrian ,  Robert Southworth ,  Pedro Yebenes Segura ,  Curt E. Bruns ,  Sujoy Sen

IPC: H04L47/127 ,  H04L47/122 ,  H04L47/2441 ,  H04L47/30

Abstract: Examples described herein relate to a switch, when operational, that is configured to receive in a packet an indicator of number of remaining bytes in a flow and to selectively send a congestion message based on a fullness level of a buffer and indication of remainder of the flow. In some examples, the indicator is received in an Internet Protocol version 4 consistent Options header field or Internet Protocol version 6 consistent Flow label field. In some examples, the congestion message comprises one or more of: an Explicit Congestion Control Notification (ECN), priority-based flow control (PFC), and/or in-band telemetry (INT). In some examples, to selectively send a congestion message to a transmitter based on a fullness level of a buffer that stored the packet and the number of remaining bytes in flow, the switch is to determine whether the buffer is large enough to store the remaining bytes in the flow.