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Label exchange route setting method, system and equipment of virtual special network channel

A technology of label switching path and virtual private network, applied in the field of virtual private network, which can solve the problems of VPN packet loss, affecting VPN packet forwarding performance, and increasing packet delay, etc.

Active Publication Date: 2010-09-22
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, some VPN packets on PE1 will be lost, which increases packet delay and affects VPN packet forwarding performance.

Method used

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  • Label exchange route setting method, system and equipment of virtual special network channel
  • Label exchange route setting method, system and equipment of virtual special network channel
  • Label exchange route setting method, system and equipment of virtual special network channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0075] assume in figure 1 In the shown network, an LSP from PE1 to PE2 is established for VPN1. This LSP includes PE1, P1, P2, and PE2. Bind labels and notify each other of the label binding relationship. The following describes the process of establishing an LSP from PE1 to PE2 in an L3VPN or L2VPN network.

[0076] Figure 6 It is a specific flow chart of the method for establishing an LSP serving as an MPLS VPN tunnel in the embodiment of the present invention. Such as Figure 6 As shown, the method includes:

[0077] Step 601, for L3VPN, PE1 and PE2 establish an MP-IBGP connection for exchanging VPN routing information; for L2VPN, PE1 and PE2 establish an LDP connection for exchanging L2PW information.

[0078] In this step, in the same manner as described in the background technology, a loopback interface is pre-configured on PE1 and PE2, and an MP-IBGP connection or an LDP connection is established on the interface.

[0079] For L3VPN, after the MP-IBGP connection ...

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PUM

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Abstract

This invention discloses a method for setting up label switch path of MIPLS VPN tunnel including: a label switch router LSR in a network determines the forward equivalence FEC corresponding to the destination IP address of the MPLS VPN tunnel to distribute label to it firstly and set up a binding relation between the FEC and the distributed label and notifies the binding relation with the prior label to its upper reach LSR, which receives the binding relation notified by the lower reach LSR to process the binding relation with the prior label priorly. This invention also discloses a LSP set-up system and a device of the MPLS VPN tunnel.

Description

technical field [0001] The present invention relates to a virtual private network (VPN) technology, in particular to a method, system and equipment for establishing a label switching path (LSP) of a multi-protocol label switching (MPLS) VPN tunnel. Background technique [0002] VPN has the ability to implement a dedicated network through multiple technologies (such as tunneling, encryption, etc.) in a shared network, and can provide stronger scalability and flexibility while ensuring network security, reliability, and manageability. MPLS VPN is a VPN technology based on provider edge (PE) equipment in the VPN solution. According to the protocol layer of the forwarding plane, it is divided into L2VPN and L3VPN. L3VPN uses BGP to advertise VPN routes between PE devices. L2VPN uses BGP or LDP to advertise virtual connection (PW, Pseudo Wire) information between PE devices. Both L2VPN and L3VPN use MPLS to forward VPN packets on the service provider backbone network. , using th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L12/56H04L45/50
Inventor 叶金荣
Owner XINHUASAN INFORMATION TECH CO LTD
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