Medium/media access control address conflict detection method, device and system

Abstract

The invention provides a medium/media access control (MAC) address conflict detection method, which comprises that: before accessing a network, local network equipment transmits a MAC address conflict detection request message to a destination multicast address, wherein the request message carries a current MAC address of the network equipment; destination network equipment receiving the request message extracts the MAC address from the message request, detects the MAC address, and when judging that the extracted MAC address is the same as own MAC address, transmits a MAC address conflict detection response message to a requesting multicast address; and the local network equipment receiving the response message generates a new MAC address. The invention also discloses a MAC address conflict detection device and a MAC address conflict detection system. By the method, the device and the system, the occurrence of MAC address conflicts can be effectively avoided, the network equipment can be ensured to access the network normally, normal network service can be provided for a user, and risks in network attacks can be reduced.

Description

technical field [0001] The present invention relates to Ethernet access technology, in particular to a medium access control (Medium / Media Access Control, MAC) conflict detection method, device and system. Background technique [0002] At present, the Internet is an Internet Protocol Version 6 (IPv6) network. With the development of network technologies such as smart cities, electronic earth, and the Internet of Things, people's demand for access to IPv6 networks continues to expand anytime and anywhere. A variety of wired and wireless network devices are constantly connected to the IPv6 network. Moreover, with the development of virtualization technology, virtual network devices are also continuously added to the IPv6 network. However, since the MAC addresses of existing network devices are mostly 48-bit addresses that are randomly solidified and generated when they leave the factory, they cannot be changed. In this way, with the increasing number of network devices conne...

AI Technical Summary

Problems solved by technology

However, since the MAC addresses of existing network devices are mostly 48-bit addresses that are randomly solidified and generated at the factory, they cannot be changed.

In this way, with the increasing number of network devices connected to the Layer 2 switching network, it is more and more likely that different network devices have the same MAC address, which will lead to MAC address conflicts.

[0003] Since the data packet forwarding of the Layer 2 switch is based on the MAC address, when there is a MAC address conflict in the Layer 2 switching network, it will cause the MAC forwarding table to fluctuate, causing the Layer 2 switch to send a service response interaction message by mistake. , service access messages and other messages, which will cause network devices with MAC address conflicts to fail to access the network normally and cannot provide users with network services normally.

[0004] In addition, because the packets exchanged by the network will be directed to another device with conflicting MAC by the Layer 2 switch, it will not only lead to the risk of leakage of network confidential information, but also cause network attacks to be directed to undesired network devices or virtual devices, thus bringing risk of cyber attack

[0005] At present, although some network devices can automatically generate new MAC addresses according to preset policies and rules, the automatically generated MAC addresses will still conflict with the MAC addresses of other network devices.

Images