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

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

Active Publication Date: 2007-12-19
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 that in the network shown in Figure 1, an LSP from PE1 to PE2 is established for VPN1. This LSP includes four LSRs: PE1, P1, P2, and PE2. The P device and PE1 perform label binding and notify each other of the label binding relationship. The following describes the process of establishing an LSP from PE1 to PE2 in an L3 VPN or L2 VPN network.

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

[0077] Step 601, for L3 VPN, PE1 and PE2 establish MP-IBGP connection for exchanging VPN routing information; for L2 VPN, PE1 and PE2 establish LDP connection for exchanging L2 PW 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 L3 VPN, a...

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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 L2 VPN and L3 VPN. L3 VPN uses BGP to advertise VPN routes between PE devices, L2 VPN uses BGP or LDP to advertise virtual connection (PW, Pseudo Wire) information between PE devices, and both L2 VPN and L3 VPN use MPLS to forward VPN on the service provider backbone network message, ...

Claims

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Application Information

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IPC IPC(8): H04L12/46H04L12/56H04L45/50
Inventor 叶金荣
Owner XINHUASAN INFORMATION TECH CO LTD
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