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Method and gateway device for updating address resolution protocol entry in software defined network

A software-defined network and gateway device technology, applied in the field of communications, can solve the problem that dynamic ARP entries cannot cover SDNARP entries, etc.

Active Publication Date: 2018-03-23
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention proposes a method and a gateway device for updating address resolution protocol entries in a software-defined network, which effectively solves the problem that dynamic ARP entries cannot cover SDN ARP entries in the prior art.

Method used

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  • Method and gateway device for updating address resolution protocol entry in software defined network
  • Method and gateway device for updating address resolution protocol entry in software defined network
  • Method and gateway device for updating address resolution protocol entry in software defined network

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0059] figure 2 It is the network structure diagram of this embodiment, such as figure 2 As shown, the OpenFlow network includes an OpenFlow controller and an OpenFlow gateway device, and virtual machine 1 is a newly deployed virtual machine in the OpenFlow network. It is assumed that all OpenFlow ARP entry modification types are configured on the OpenFlow gateway device in this embodiment to allow dynamic ARP tables Item coverage, and denoted by "1". image 3 Be the flow chart of this embodiment, such as image 3 shown, including the following steps:

[0060] Step 301: The virtual machine 1 sends a gratuitous ARP packet to the OpenFlow gateway device and the OpenFlow controller respectively, and the gratuitous ARP packet carries the IP address and the MAC address of the virtual machine 1.

[0061] In this step, virtual machine 1 is a newly deployed virtual machine, and sends gratuitous ARP packets to the OpenFlow gateway device and OpenFlow controller respectively. The g...

Embodiment 2

[0088] This embodiment still uses figure 2 In the networking diagram shown, it is assumed that the modification type of all OpenFlow ARP entries on the OpenFlow gateway device is allowed to overwrite OpenFlow ARP entries, and the ARP table shown in Table 5 has been saved. Figure 4 Be the flow chart of this embodiment, such as Figure 4 shown, including the following steps:

[0089] Step 401: The OpenFlow gateway device receives the ARP packet sent by the virtual machine 1, and the ARP packet carries the IP address and the MAC address of the virtual machine 1.

[0090] Step 402: The OpenFlow gateway device determines the OpenFlow ARP entry that matches the received ARP message, and determines that the received ARP message is inconsistent with the matched OpenFlow ARP entry, and sends the first ARP request message. The destination MAC address of the ARP request packet is the MAC address of the virtual machine recorded in the matching OpenFlow ARP entry.

[0091] In this ste...

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PUM

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Abstract

The invention discloses a method for updating the address resolution protocol (ARP) table item in a software-defined network (SDN). The method comprises the steps that under the condition that the modification type of an SDN ARP table item configured on SDN gateway equipment is that covering by a dynamic ARP table item is allowed, when the SDN gateway equipment receives an ARP message sent by a virtual machine, whether the ARP message is consistent with the content of the matched SDN ARP table item is judged, the dynamic ARP table item is generated according to the ARP message and covers the matched SDN ARP table item if not, and the SDN ARP table item is reserved if yes; when the SDN gateway equipment receives an SDN flow table sent by an SDN controller, whether the SDN flow table is consistent with the content of the matched dynamic ARP table item is judged, a corresponding virtual machine is triggered to make an ARP response and the matched dynamic ARP table item is updated according to the ARP response made by the virtual machine if not, and the SDN ARP table item is generated according to the SDN flow table and covers the matched dynamic ARP table item if yes.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for updating address resolution protocol entries in a software-defined network and a gateway device. Background technique [0002] The software defined network (Software Defined Network, SDN) controls the forwarding behavior of the SDN gateway device through the SDN controller. The address resolution protocol (Address Resolution Protocol, ARP) entry corresponding to the virtual machine is saved on the SDN gateway device, and the ARP entry mainly has the following two types: [0003] (1) SDN ARP entry. The SDN controller sends the SDN flow table to the SDN gateway device, and the SDN gateway device generates an SDN ARP entry according to the received SDN flow table, and the SDN ARP entry does not perform aging processing. [0004] (2) Dynamic ARP entries. The gateway device learns and creates dynamic ARP entries through ARP packets. In an SDN network, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12H04L12/66
CPCH04L12/66H04L61/103
Inventor 李昊
Owner NEW H3C TECH CO LTD