Method, system and device for realizing VLL in QinQ subinterface

Abstract

The method includes steps: when inner layer TAGs of QinQ sub interfaces of entrance device and exit device are in same range segment, the method peels off outer layer TAG of received message; then, through MPLS tunnel, the message is sent to exit device; after receiving message, exit device packages new outer layer TAG, and sends it to user end. The invention also discloses system including entrance device and exit device for realizing VLL on QinQ sub interface. The invention also discloses module for peeling off outer layer TAG, and message forwarding module. Comparing with prior art, the invention can implement VLL when inner layer TAG in QinQ sub interface being as range segment.

Description

technical field

[0001] The present invention relates to the field of network communication, in particular to a method and system for implementing a VLL (Virtual Lease Line, virtual leased link) on a QinQ sub-interface, and a device. Background technique

[0002] With the increase of the number of broadband users and the increase of business types, the traditional VLAN (Virtual Local Area Network, Virtual Local Area Network) technology can no longer meet the needs of business development, for example: see figure 1 , which is a traditional Layer 2 interconnection mode. User network 1 and user network 2 are located in two different locations, and are connected to the backbone network through the edge nodes PE1 and PE2 of the service provider for interconnection. If the user needs to connect the VLAN of network 1 200~300 are interconnected with VLAN 200~300 of network 2, the user network edge nodes CE1, PE1, P and PE2, and the ports connected to CE2 must be configured as trunk (...

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