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Method and device for preventing loop in virtual private network

A virtual private network and functional technology, which is applied in the field of network communication and can solve problems such as broadcast storm and multi-frame copying.

Inactive Publication Date: 2010-12-08
ZTE CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] In VPLS, the interconnection of LAN sites across the WAN is realized through MAC forwarding. Therefore, once a loop occurs in VPLS, there must be MAC drift, and the formation of a loop will cause problems such as broadcast storms and multi-frame copying. Provides a way to prevent loop formation

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  • Method and device for preventing loop in virtual private network
  • Method and device for preventing loop in virtual private network

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Embodiment Construction

[0026] The basic idea of ​​the present invention is: according to the MAC entry reported by the subsystem of the service provider equipment PE, the MAC drift is counted to obtain the MAC drift frequency; the MAC drift frequency is compared with the preset maximum MAC drift frequency; When the MAC drift frequency is greater than or equal to the maximum MAC drift frequency, block the AC or PW that transmits the MAC to the PE.

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0028] figure 2 Shows the flow of the method for preventing loops in the virtual private network of the present invention, such as figure 2 As shown, the method includes the following steps:

[0029] S201, the PE subsystem learns the MAC of the Ethernet packet received from the PW, and the MAC of the Ethernet pa...

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Abstract

The invention provides a method and a device for preventing a loop in a virtual private network. The method comprises the following steps of: counting the shifting of MAC according to MAC items reported by a subsystem of service provider equipment PE to obtain MAC shifting frequency; comparing the MAC shifting frequency with the preset maximum MAC shifting frequency; and when the MAC shifting frequency is more than or equal to the maximum MAC shifting frequency, blocking AC or PW for transmitting the MAC to the PE. The invention provides a method and a device for preventing a loop in a virtual private network. The MAC shifting phenomenon exists according to the formation of the loop, and a protection policy can be configured according to user requirement and networking requirement; when that the MAC shifting frequency is more than or equal to the maximum MAC shifting frequency is detected, the AC or PW configured with the protection policy is blocked to fulfill the aim of eliminating the loop; therefore, the stable network is ensured, the service demand is met and the implementing method is more flexible, simple and convenient.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method and device for preventing loops in a virtual private network. Background technique [0002] Virtual Private LAN Service (VPLS) is an implementation of Multi-Protocol Label Switching Layer 2 Virtual Private Network (MPLS L2VPN). VPLS is based on Multi-Protocol Label Switching (Multi-Protocol Label Switching) Protocol Label Switching, MPLS) and Ethernet technology Layer 2 Virtual Private Network (Virtual Private Network, VPN) technology, providing virtual Ethernet services on the existing WAN, through membership discovery, virtual link (Pseudo Wire, PW ) establishment and maintenance, and forwarding based on Media Access Control (MAC) in the Virtual Forwarding Instance (VFI) to realize the interconnection of LAN sites across the WAN, thereby interconnecting geographically dispersed LAN sites through the Internet. link up. [0003] figure 1 A schematic diagram of a t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L12/801
Inventor 王鸾吴学智
Owner ZTE CORP
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