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A flood suppression method of arp protocol under sdn

A technology of ARP protocol and ARP request, applied in the field of flood suppression of ARP protocol under SDN, it can solve problems such as affecting network performance and cyclic forwarding, and achieve the effect of increasing path redundancy, reducing forwarding and saving network bandwidth.

Active Publication Date: 2022-03-25
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the data center network, in order to ensure reliability, redundant lines are often used. At this time, it is easy for ARP to flood out from an SDN switch, go around and be forwarded back to the SDN switch again from another port.
If it is not suppressed, loop forwarding is easy to occur, which greatly affects network performance

Method used

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  • A flood suppression method of arp protocol under sdn
  • A flood suppression method of arp protocol under sdn

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Experimental program
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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific examples.

[0016] see figure 1 and 2 , a flood suppression method of ARP protocol under SDN, its specific steps are as follows:

[0017] Step 1. Preparatory stage

[0018] The system is initialized, and the SDN switch forwarding control module installs default flow entries for all SDN switches, and all SDN switches report the new network packets that do not match the flow table to the SDN controller one by one.

[0019] Step 2, buffer table recording and query phase

[0020] A buffer table for ARP requests is added in the SDN controller, and each record in the buffer table consists of source IP, destination IP, data path number of the SDN switch, and current timestamp. By querying the buffer table, it can be known in which SDN switches the ARP request packet has been forwarded. ...

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PUM

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Abstract

The invention discloses a method for suppressing flooding of the ARP protocol under SDN. An ARP request buffer table is added in the SDN controller to record the source IP and destination IP information of the ARP request packet and which switches the packet has been processed in. Forward. When a new ARP request packet enters the SDN switch, the switch will report the packet to the controller, and the controller will check the table. If the entry related to the ARP packet is checked, it indicates that the ARP packet has been forwarded recently, that is, it is not Re-forwarding, thus suppressing the data storm problem caused by ARP flooding.

Description

technical field [0001] The invention relates to the technical field of computer network and system security, in particular to a method for suppressing flooding of the ARP protocol under SDN. Background technique [0002] Software Defined Networking (Software Defined Networking, abbreviated as "SDN") is a new network innovation architecture proposed by the team of Professor Nick McKeown of Stanford University in the United States. It belongs to intelligent network. In SDN, Address Resolution Protocol (ARP) is used to realize the mapping from IP address to MAC address, that is, to query the MAC address corresponding to the target IP. The prerequisite for two hosts to communicate is to know the MAC addresses of each other's hosts. When the host receives an ARP request, it will look up the table in its own ARP cache table, and update the mapping in the ARP request packet to the cache table. When the host receives an ARP reply, it will update the mapping in the ARP reply packe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40
CPCH04L63/1458
Inventor 覃匡宇唐海洋何倩陈鹏
Owner GUILIN UNIV OF ELECTRONIC TECH