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A link switching method and device

A link switching and link technology, applied in the communication field, can solve problems such as business interruption, and achieve the effect of avoiding business interruption and improving stability.

Active Publication Date: 2019-04-09
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a link switching method and device to solve the problem that when the main link is interrupted in the H-VPLS network, the backup link causes service interruption due to the establishment of MAC entries

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  • A link switching method and device

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Embodiment Construction

[0042] Please refer to figure 1The H-VPLS network architecture diagram, which can be divided into border areas and backbone areas. Usually, one UPE (User facing-Provider Edge, user-facing PE equipment) is deployed in the border area, and multiple functions with the same function are deployed in the backbone area. The NPE (Network Provider Edge, network-oriented PE equipment) communicates with each other through the N-PW (Pseudo Wire, virtual link). In order to ensure the stability of the H-VPLS network, UPE usually establishes link connections with two NPEs in the backbone area, one of which is used as the main link and the other is used as the backup link. For example, MU-PW is the main link. , BU-PW is the backup link. In a normal state, when CE1 communicates with CE2 through the H-VPLS network, the traffic will be forwarded to the backbone area through the main link. The forwarding path is: CE1→UPE→NPE1→NPE2→CE2, as indicated by the dashed arrow in the figure Show.

[00...

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Abstract

The present invention provides a link switching method and device. The method is applied to connect the main PE of a main link in an H-VPLS network. The method comprises: when the main link is interrupted, a first link and a second link connected with the main link are converted to a layered link; a local object MAC address is sent to a standby PE to allow the standby PE to send the flow to the main PE according to the guidance of the object MAC address after the standby PE receives flow through a standby link; and the flow sent by the standby PE is received, and the flow is forwarded to an object device according to a local first MAC item used for guidance of flow forwarding. Therefore, the business interruption in the process of the link switching may be avoided, and the stability of a network is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a link switching method and device. Background technique [0002] In a VPLS (Virtual Private LAN Service, virtual private local area network service) instance, it is generally required that links between all PEs (Provider Edges, operator border network equipment) be fully connected. However, as the network scale continues to expand, the number of links will also increase exponentially, making network management and expansion complex. In order to simplify network management, H-VPLS (Hierarchical VPLS, hierarchical VPLS) technology emerges as the times require. H-VPLS can avoid establishing too many links by dividing the network into backbone areas and border areas. [0003] In the prior art, when the primary link in the boundary area of ​​the H-VPLS network fails, the packet forwarding path will be switched to the backup link. Because the PEs on the backup link n...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/46
CPCH04L12/4641H04L41/0668
Inventor 黄李伟王伟
Owner NEW H3C TECH CO LTD