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A method and device for supporting port migration detection

A port and detection unit technology, applied in the field of network communication, can solve problems such as port migration failure

Active Publication Date: 2019-12-06
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a method and device for supporting port migration detection, so as to solve the problem that port migration may not be successful when the DHCPSnooping security mechanism is applied in the prior art

Method used

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  • A method and device for supporting port migration detection
  • A method and device for supporting port migration detection
  • A method and device for supporting port migration detection

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0026] See figure 1 , figure 1 A schematic flowchart of a method for supporting port migration detection provided for the implementation of the present invention, such as figure 1 As shown, the method for supporting port migration detection may include the following steps:

[0027] It should be noted that, in the embodiment of the present invention, the execution subject of steps 101 to 103 is a communication device supporting the DHCPSnooping security mechanism, such as a switch or router. For the convenience of description,...

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Abstract

The present invention provides a method and device for supporting port migration detection. The method includes: when a MAC address is learned on a first port, querying a Dynamic Host Configuration Protocol (DHCP) Snooping entry according to the MAC address; If the corresponding target DHCP Snooping entry is found, and the second port recorded in the target DHCP Snooping entry is inconsistent with the first port, then detect whether the target client corresponding to the target DHCP Snooping entry is currently connected At the second port; if it is detected that the target client is not currently connected to the second port, it is determined that port migration occurs in the target client, and the port recorded in the target DHCP Snooping entry is replaced by The second port is changed to the first port. The application of the embodiment of the present invention can ensure that the port migration can be carried out normally when the DHCP Snooping security mechanism is applied.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and device for supporting port migration detection. Background technique [0002] DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) adopts a client / server mode, and the server dynamically assigns network configuration parameters such as IP (Internet Protocol, Internet Protocol) addresses to network devices. [0003] DHCP Snooping (listening) is a security mechanism of DHCP, which is used to ensure that the client obtains an IP address from a legal server. In order to enable DHCP clients to obtain IP addresses through legal DHCP servers, the DHCP Snooping security mechanism allows ports to be set as trusted ports and untrusted ports: [0004] The trusted port normally forwards the received DHCP message; [0005] After the untrusted port receives the DHCP-ACK (acknowledgement) and DHCP-OFFER (offer) messages from the DHCP serve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12
CPCH04L61/103H04L61/255H04L61/5014H04L2101/622
Inventor 林长望
Owner NEW H3C TECH CO LTD
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