A method and device for detecting ipv6 address conflicts in an SDN network

Abstract

The embodiment of the present invention provides a method and device for detecting IPv6 address conflicts in an SDN network, which receives a multicast detection message sent by a first network device, and the multicast detection message includes the MAC address of the first network device and the IPv6 address to be tested. address; judge whether the IPv6 address list has the IPv6 address to be tested; if the judgment result is yes, the multicast detection packet is converted to the unicast detection packet whose purpose MAC address is the MAC address of the second network equipment, and the unicast detection The message is sent to the second network device; the multicast response message sent by the second network device is received, and based on the correspondence between the MAC address of the first network device and the IPv6 address to be tested, the multicast response message is converted into a destination The MAC address is the unicast response message of the MAC address of the first network device, and the unicast response message is sent to the first network device. Implemented the ability to detect IPv6 address conflicts even when the flooding function is disabled.

Description

technical field [0001] The present invention relates to the technical field of network communication, and in particular, to a method and device for detecting an IPv6 address conflict in an SDN network. Background technique [0002] In Software Defined Network (SDN), in order to prevent flooding traffic from occupying network and computing resources, the flooding function of multi-layer virtual switch (OpenVSwitch, OVS) is usually disabled, that is, multicast and broadcast packets are prohibited. Forward. For some services that must use multicast or broadcast packets, OVS can convert multicast and broadcast packets into unicast packets, that is, replace the multicast IPv6 address with the target IPv6 address carried in the packet, and then send the target IPv6 address to forward unicast packets. [0003] However, if there is an IPv6 address conflict in the network, existing solutions cannot detect it. The reason is that the response packet for detecting address conflict is...

AI Technical Summary

Problems solved by technology

The first solution is to enable the flooding function, so that the multicast packets can be forwarded directly, but enabling the flooding function will occupy more bandwidth and computing resources, and it is more vulnerable to attacks, and the security is poor; the second solution The solution is to use the SDN controller to respond, that is, all the response messages are uploaded to the SDN controller and forwarded by the SDN controller, but this will cause a lot of pressure on the controller and require higher performance of the controller

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