Method for implement virtual leased line

Abstract

The present invention discloses a method for implementing the Virtual Leased Line. It can utilize fully the prior equipments, implement the automatic configuration and ensure the demands of the aspects of traffic engineering etc. When the encapsulation is simple and the cost is lower. The method for implementing the Virtual Leased Line comprises the steps: A) configuring the label stack of the VLAN based on the VLAN QinQ; B) setting the intercommunication between the VLAN QinQ switching equipment and the multi-protocol label switching equipment; C) expanding the label distribution protocol to encapsulate the VLAN label in order to distribute the VLAN label and make the expanded the label distribute protocol as the topological discovery protocol of the L2 VPN; D) setting the range of the VLAN label; E) implementing the Virtual Leased Line by constructing the switched path of VLAN, based on the the steps A, B, C and D.

Description

technical field

[0001] The present invention relates to the realization of a virtual private network, in particular to the realization of a virtual leased line virtual private network. Background technique

[0002] After more than 30 years of development, the Ethernet technology based on the Transmission Control Protocol / Internet Protocol (TCP / IP for short) has become an absolutely dominant LAN technology and has successfully entered the public network. The core network is rooted in the metropolitan area network and gradually penetrates into the public access network. For almost every application, Ethernet technology has become the de facto transmission protocol standard. Due to its simplicity, flexibility and low cost, its advantages have far exceeded some traditional technologies, such as Token Ring (Token Ring) ), fiber distributed data interface (Fiber Distributed Data Interface, referred to as "FDDI") and asynchronous transfer mode (Asynchronous Transfer Mode, referred...

Examples

Embodiment Construction

[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0056] The method for realizing VLL that the present invention proposes, aiming at the present situation that a large number of Ethernet switches are used in the metropolitan area network at present, utilizes the characteristic of Ethernet technology itself, proceeds from technical simplicity and universality, realizes based on VLAN label switching and MPLS expansion, Its basic principle is VLAN exchange and localization, and adopts this kind of technology to establish VLL. The scheme of the present invention uses the VLAN label in the Ethernet 802.1Q encapsulation as a label, uses QinQ technology to realize a two-layer label stack, and uses the Ethernet frame header to encapsulate the payload, and expands the MPLS protocol to realize the automatic allocation of VL...

technical field

[0001] The present invention relates to the realization of a virtual private network, in particular to the realization of a virtual leased line virtual private network. Background technique

[0002] After more than 30 years of development, the Ethernet technology based on the Transmission Control Protocol / Internet Protocol (TCP / IP for short) has become an absolutely dominant LAN technology and has successfully entered the public network. The core network is rooted in the metropolitan area network and gradually penetrates into the public access network. For almost every application, Ethernet technology has become the de facto transmission protocol standard. Due to its simplicity, flexibility and low cost, its advantages have far exceeded some traditional technologies, such as Token Ring (Token Ring) ), fiber distributed data interface (Fiber Distributed Data Interface, referred to as "FDDI") and asynchronous transfer mode (Asynchronous Transfer Mode, referred...

Examples

Embodiment Construction

[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0056] The method for realizing VLL that the present invention proposes, aiming at the present situation that a large number of Ethernet switches are used in the metropolitan area network at present, utilizes the characteristic of Ethernet technology itself, proceeds from technical simplicity and universality, realizes based on VLAN label switching and MPLS expansion, Its basic principle is VLAN exchange and localization, and adopts this kind of technology to establish VLL. The scheme of the present invention uses the VLAN label in the Ethernet 802.1Q encapsulation as a label, uses QinQ technology to realize a two-layer label stack, and uses the Ethernet frame header to encapsulate the payload, and expands the MPLS protocol to realize the automatic allocation of VL...

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