Data transmission method, apparatus and system in VPLS network

Abstract

The embodiment of the invention discloses a method for transmitting data in a virtual special LAN service (VPLS) network, a device and a system thereof. A main virtual link circuit PW and a ready-for-use virtual link circuit PW are arranged in the VPLS network. The method for transmitting data comprises that: when the main virtual link circuit PW transmits the data message, the forwarding of the data message by the ready-for-use virtual link circuit PW is prohibited; when the main PW goes wrong, the transmission of the data message is switched to the ready-for-use PW from the main PW, and the data message is transmitted by the ready-for-use PW. Due to the embodiment of the invention, the forming of a ring circuit between UPE and NPE which are accessed in a way of double-returning is avoided; when the main PW goes wrong, the link circuits can be switched quickly, and the convergence of the link circuits is accelerated, therefore, QoS of the VPLS network is improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of computer networks, and in particular to a data transmission method, device and system in a VPLS network. Background technique [0002] VPLS (Virtual Private LAN Service, virtual private local area network service) network is a point-to-point, point-to-multipoint or multipoint-to-multipoint L2VPN (Layer2 Virtual Private Network) based on MPLS (Multiprotocol Label Switching, multi-protocol label switching) , Layer 2 virtual private network) network. The VPLS network is mainly composed of UPE (User facing-Provider Edge, user-facing operator edge network equipment), NPE (Network Provider Edge, network-oriented operator edge network equipment) and CE (Custom Edge, user edge network equipment) and other equipment constitute. Among them, UPE is a user aggregation device, directly connected to CE, and supports routing and MPLS encapsulation. The NPE is a core device connected to the U...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: a loop is formed between the dual-homed UPE and the NPE, and an additional protocol such as the STP protocol is required to cut off the loop, which increases the burden on the NPE. Moreover, because each CE port can only deploy one virtual link, that is, only one virtual link can be deployed between the UPE and the NPE, the UPE in the VPLS network cannot be dual-homing protected, and the QoS (Quality of Service, service quality) is low

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