Method for improving reliability of IPv6 address allocation by SLAAC

Abstract

The invention particularly relates to a method for improving the reliability of IPv6 address allocation of an SLAAC. The invention discloses a method for improving reliability of IPv6 address allocation by an SLAAC. The method comprises the following steps: receiving an Open vSwitch device through an SDN controller; and the SDN controller sends an RA message to the virtual machines by using an OpenFlow protocol, so that the virtual machines are successfully allocated to the IPv6 address, and three-layer flow intercommunication among the virtual machines is realized in a mode of forwarding theIPv6 message under the guidance of a pre-issued flow table. The invention discloses a method for improving reliability of IPv6 address allocation by an SLAAC. The control authority of the gateway is transferred to the SDN controller; the load pressure of the gateway is effectively reduced, the situation that a virtual machine cannot learn a global unicast address in an SLAAC mode can be avoided, the efficiency and reliability of SLAAC address allocation are improved, meanwhile, an RA message is converted into a controllable factor, and the robustness and availability of a network system are enhanced.

Description

technical field [0001] The invention relates to the technical field of computer network communication, in particular to a method for improving the reliability of IPv6 address allocation by SLAAC. Background technique [0002] With the maturity of Internet technology and the increasing number of network devices, the IPv4 network protocol can no longer meet the communication needs of existing communication devices. And born. [0003] The IPv6 network protocol extends the IP address to 128 bits, providing 2^128-1 addresses, which can effectively meet the address allocation problem of networked devices. With the application of the IPv6 protocol, the problems brought about by the IPv6 address allocation method are becoming more and more obvious. [0004] There are three main methods of IPv6 address assignment: the first is the default method, that is, manual configuration, and you can configure a global unicast address for the host according to your own needs; the second is the...

AI Technical Summary

Problems solved by technology

[0006] First, there are currently different operating systems for virtual machines on the market, such as ubuntu / centos, etc. For virtual machines with different operating systems using SLAAC, the timing of sending RS (Router solicitation, router request) messages is different, and the SLAAC method cannot guarantee virtual machines. The machine immediately obtains the address;

[0007] Second, routers or gateways send RA notifications regularly, and this RA notification is sent within a certain time interval, which makes it impossible for the virtual machine to obtain the address during the interval;

[0008] Third, after the virtual machine is assigned an address, it may not be able to learn the link-local address of the gateway, resulting in unreachable Layer 3 IPv6 traffic;

[0009] Aiming at the above-mentioned abnormal problem of SLAAC address allocation, the present invention proposes a method for improving the reliability of SLAAC allocation of IPv6 addresses

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