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Method and device for improving reliability of user terminal dual attachment network in VPLS system

A client device and dual-homing technology, which is applied in the field of computer communication, can solve problems such as communication interruption, achieve the effect of improving reliability and reducing communication interruption time

Active Publication Date: 2009-02-11
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem in the prior art that when the network link is interrupted, VPLS cannot sense the network topology change and cause the communication interruption of the client device of the failed link, the present invention provides a method for improving the reliability of the dual-homing network of the client device in VPLS. A revolutionary method and device, which can react in time after the network topology changes, so as to prevent the interruption of network communication

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  • Method and device for improving reliability of user terminal dual attachment network in VPLS system
  • Method and device for improving reliability of user terminal dual attachment network in VPLS system
  • Method and device for improving reliability of user terminal dual attachment network in VPLS system

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Embodiment Construction

[0032] Such as figure 1 As shown, a VPLS virtual switching instance is established between the service provider equipment PE-1, PE-2 and PE-3, and the client equipment CE-2 is dual-homed to the service provider equipment PE-2 and PE-3 , in order to realize loop-free, the STP protocol is run on the client device CE-2 for calculation, which is used to calculate a loop-free forwarding path. Assume that the result of STP calculation is: the E0 interface is in the forwarding state, and the E1 interface is in the blocking state. User PC-1 and PC-2 are two PCs, and they communicate through the VPLS network. During this process, the VSI will learn the MAC address as follows: PE-2 learns the MAC address of PC-2 on the interface connected to CE-2, and PE-1 learns the MAC address of PC-2 on the virtual circuit of PW-1. .

[0033] If the link between CE-2 and PE-2 is interrupted, CE-2 recalculates the STP, and the result of the calculation is that the E1 interface is in the forwarding ...

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Abstract

The invention relates to a method for improving the network reliability of VPLS client device and a relative device, wherein said method uses virtual exchanger to detect the TCN report; when the virtual exchanger receives the TCN BPDU report, clearing the MAC address list of said exchanger and the MAC address list of relative virtual exchanger. Since the inventive VPLS can detect BPDU TCN report at any time, when one chain is cut off in network, the network can build new connection on time, and send BPDU TCN report to the virtual exchanger, and the virtual exchange receives said report and refresh the MAC address list on time; therefore, the sent report will not be lost, to reduce the interrupt time between CE, and improve the network transmission reliability.

Description

technical field [0001] The invention relates to the technical field of computer communication, in particular to a method and a device for improving the reliability of a dual-homing network of client equipment in VPLS. Background technique [0002] VPLS (Virtual Private Local Area Network Service) is a technology that provides point-to-multipoint L2 VPN (Virtual Private Networks) on MPLS (Multi-Protocol Label Switch) / IP network , also known as transparent LAN service. More and more operators adopt VPLS technology to provide VPN services for enterprise users. VPLS can be regarded as a group of VSI (Virtual Switch Instance, virtual switching instance), and VSI is connected through EoMPLS (Ethernet over MPLS, a technology of Ethernet over MPLS) virtual circuit to form a logical Ethernet switch. The working principle of the VSI is similar to that of an Ethernet switch, such as learning MAC addresses, forwarding Ethernet frames based on MAC addresses, and so on. If the destinat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L12/66
Inventor 徐小虎
Owner HUAWEI TECH CO LTD
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