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A kind of fast-cnp data transmission method and system based on sdn

A technology of FAST-CNP and data transmission system, applied in the field of FAST-CNP data transmission method and system based on SDN, can solve the problems of aggravating the degree of congestion deterioration, not really considering the efficiency of the network card of the sender of CNP messages, etc. Quality, time-efficiency improvement

Active Publication Date: 2022-07-26
PURPLE MOUNTAIN LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The FAST-CNP protocol is a local optimization based on the DCQCN protocol, which shortens the congestion feedback path, but does not really consider the efficiency of the CNP message reaching the sender network card. If the CNP message encounters congestion during transmission, Then the sender's NIC cannot respond in a timely manner to reduce the speed, thus aggravating the degree of congestion in a short time

Method used

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  • A kind of fast-cnp data transmission method and system based on sdn
  • A kind of fast-cnp data transmission method and system based on sdn
  • A kind of fast-cnp data transmission method and system based on sdn

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Embodiment 1

[0048] like figure 1 As shown, the SDN-based FAST-CNP data transmission system provided by the present invention includes several SDN controllers, host-side systems, smart network cards, and switch systems; wherein,

[0049] The SDN controller is used to provide the NETCONF protocol service, collect the information of the intelligent network card and the switch, and simultaneously carry the function of delivering the information of the intelligent network card and the switch through the NETCONF protocol;

[0050] The smart network card is used to collect data information, set VxLAN information, decapsulate VxLAN packets, obtain payload information, that is, CNP packets, and then parse the CNP packets to perform corresponding QP queue deceleration operations;

[0051] The host-side system and the SDN controller establish a NETCONF link, obtain the mapping information of the host-side smart network card, set the host-side smart network card information, and map the management po...

Embodiment 2

[0071] like Figure 4 As shown, based on the SDN-based FAST-CNP data transmission system in Embodiment 1, the present invention also provides a transmission method thereof. The implementation of the system solution is divided into two parts: one part: control plane process. It mainly controls the collection and distribution process of information, which is divided into intelligent network card information collection and distribution business process, switch information collection and distribution process; the second part: data plane process. After the control information takes effect, the data plane starts to forward packets according to the control rules, that is, the switch generates CNP packets, which are encapsulated in VxLAN and sent to the destination smart NIC in the management network of the data center to take effect and reduce the speed.

[0072] The operation process of the system includes the following steps:

[0073] Step 1, the switch system immediately triggers...

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Abstract

The invention discloses an SDN-based FAST-CNP data transmission method and system. The data transmission system includes several SDN controllers, host-side systems, intelligent network cards, and switch systems; wherein, the intelligent network card is used for parsing CNP messages, Carry out the corresponding QP queue deceleration operation; the switch system, the host-side system and the SDN controller establish a link for the interaction of control information; the switch system generates a CNP message, and performs VxLAN encapsulation on the generated CNP message , the destination address of the VxLAN packet is based on the destination IP address of the CNP packet, and the INIC address mapping table is searched to obtain the IP address of the management port of the specified INIC. The source address of the VxLAN packet is the management port IP address of the switch. The invention proposes the idea of ​​SDN-based control and forwarding separation, and directly uses the control management channel to ensure that key control packets can be sent to the sender in time, and avoid discarding or delay due to data channel congestion.

Description

technical field [0001] The invention belongs to the technical field of data center congestion algorithms, and in particular relates to an SDN-based FAST-CNP data transmission method and system. Background technique [0002] The DC-QCN algorithm is based on the combination of Data Center TCP (DCTCP) and Quantized Notification Algorithm (QCN). The original algorithm was presented in the SIGCOMM'15 paper "Congestion control for large scale RDMA deployments". The DC-QCN algorithm relies on ECN marking on the switch side. ECN is a common feature of commercial data center switches. Two bits in the Differentiated Services field in the IP header of the packet are used to indicate congestion. Once congestion occurs on the switch side, these two bits are set to "11" (CE). Packets marked with ECN are propagated to the receiver's network card. The receiver's NIC creates a CNP packet and sends it to the sender of the ECN-marked packet. The CNP packet includes the information of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L69/22H04L47/12H04L47/10H04L45/74H04L12/46
CPCH04L69/22H04L47/12H04L47/23H04L45/74H04L12/4641H04L2212/00
Inventor 朱华兴汪硕黄韬
Owner PURPLE MOUNTAIN LAB