A method and device for detecting IP address conflicts in a software-defined network
A software-defined network and IP address technology, which is applied in the field of IP address conflict detection in software-defined networks, can solve problems such as single application scenarios, inability to detect IP address conflicts, and inability to detect IP address conflicts
Active Publication Date: 2018-12-11
NEW H3C TECH CO LTD
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[0003] However, the IP address conflict detection method in the prior art can only detect the IP address conflict situation between EPs in the same virtual local area network (Virtual Local Area Network, VLAN) of the local exchange
If EPs belong to different VLANs of the local switch, IP address conflict detection cannot be performed
Moreover, even if the EPs are in the same VLAN, if the EPs belong to different local switches, the IP address conflict detection method in the prior art cannot perform IP address conflict detection.
Therefore, the IP address conflict detection method in the prior art is applicable to a single scenario
Method used
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[0021] 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 the accompanying drawings.
[0022] figure 1 It is a schematic diagram of implementing IP address conflict detection in a conventional network in the prior art.
[0023] exist figure 1 Among them, local switch 1 is connected to EP1, EP2 and EP5; local switch 2 is connected to EP3, EP4 and EP6, wherein EP1, EP2 and EP6 belong to VLAN1; EP3 and EP4 belong to VLAN2; EP5 belongs to VLAN3.
[0024] When an IP address is configured on EP1, EP1 sends a gratuitous ARP message to local switch 1, and the gratuitous ARP carries EP1's own MAC address and IP address. The local switch 1 floods the gratuitous ARP message in the VLAN1 of the local switch 1, and when the conflicting device (such as EP2) receives the gratuitous ARP message, it responds with an ARP response message to EP1 through the local sw...
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An embodiment of the invention provides an IP (internet protocol) address conflict detecting method and device in the software defined network (SDN). The IP address conflict detecting method includes issuing a first flow chart item to a first SDN interchanger, wherein the first flow charge item is used for transmitting gratuitous ARP (address resolution protocol) messages received by first endpoint (EP) equipment of the first SDN interchanger to an SDN controller; determining flooding VLAN (virtual local area network) set corresponding to the VLAN to which the first EP belongs and the first SDN interchanger, and flooding the gratuitous ARP messages in the VLAN.
Description
technical field [0001] The embodiments of the present invention belong to the technical field of network communication, in particular to a method and device for detecting IP address conflicts in a software defined network (Software Defined Network, SDN). Background technique [0002] IP address conflict refers to the overlapping of IP addresses in the LAN environment. In a traditional network, IP address conflicts are generally sensed by sending gratuitous Address Resolution Protocol (Address Resolution Protocol, ARP) packets. The difference between the gratuitous ARP packet and the ordinary ARP packet is that: the ordinary ARP packet encapsulates the IP address of other endpoint devices (Endpoint device, EP), while the gratuitous ARP packet encapsulates its own IP address. After an EP sends a gratuitous ARP message, if it receives an ARP response message, it means that the IP address already exists in the network. [0003] However, the IP address conflict detection method...
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IPC IPC(8): H04L12/26
Inventor 黄林波
Owner NEW H3C TECH CO LTD