Method and device for establishing broadcasting domain in two-layer virtual dedicated network

Abstract

The invention discloses a method for establishing a broadcasting domain in a two-layer virtual dedicated network (L2VPN), which comprises the following steps: when a message is received from an access circuit (AC), the identification (ID) of a message virtual bridge domain (VBD) of the message is found out according to an AC attribute table; if an exit cannot be acquired from a forward table according to VBD ID and a targeted medium access control (MAC) address of the message, the exit of VBD can be acquired from a VBD table according to VBD ID, and after encapsulated according to the encapsulating principle, the message is sent out; when the message is received from a pseudo wire (PW), if the exit cannot be acquired from the forwarding table according to VBD ID of the message and the targeted MAC address, the exit of VBD can be acquired from the VBD table according to VBD ID, and after decapsulated according to the decapsulating principle, the message is sent out. The invention further discloses a device for establishing the broadcasting domain in L2VPN. The method and the device for establishing a broadcasting domain in a two-layer virtual private network (L2VPN) can lower the expenditure for configuring PW and the waste of the internal passage bandwidth of provider equipment (PE).

Description

technical field [0001] The present invention relates to Layer 2 Virtual Private Networks (L2VPN, Layer 2 Virtual Private Networks) technology in the field of packet communication, in particular to a method and device for establishing a broadcast domain in L2VPN. Background technique [0002] L2VPN consists of an edge device (PE, Provider Edge) and a user access device (CE, Customer Edge); the connection between PE and CE is an access circuit (AC, Attachment Circuit), and the connection between PE and PE is a fake Wire (PW, Pseudo Wire). There are two networking models for the L2VPN transmission message: a virtual pseudo wire service (VPWS, Virtual Private Wire Service) and a virtual private local area network service (VPLS, Virtual Private LAN Service). [0003] Wherein, the VPWS is a point-to-point service model, that is, in a virtual private network (VPN, Virtual Private Networks) composed of various devices between the source CE and the destination CE, ACs correspond to ...

AI Technical Summary

Problems solved by technology

However, during the process of sending broadcast packets in the above-mentioned VPLS, the PE cannot establish a smaller broadcast domain in the VPN, causing the PE to perform unnecessary packet duplication, wasting the bandwidth of the PE internal channel

[0004] It can be seen that in the existing L2VPN technology, because in the point-to-point service model of VPWS, one PW cannot be multiplexed by multiple VPN domains, resulting in a large overhead and workload of PE configuring PW; In the multi-point business model, PEs cannot establish smaller broadcast domains in the VPN, causing PEs to perform unnecessary packet replication, wasting the bandwidth of PE internal channels

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