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Method and device for forwarding virtual private network message

A technology of virtual private network and forwarding method, applied in the directions of network interconnection, data exchange network, data exchange through path configuration, etc. The effect of saving maintenance and management costs, reducing the number of units, and improving flexibility

Active Publication Date: 2011-12-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The base station is connected to PE1 / 2 through a pseudowire. PE needs to provide Layer 2 VPN termination to Layer 3 VPN forwarding and reverse functions. Currently, ASCI (Application Specific Integrated Circuits) chips cannot continuously implement Layer 2 VPN termination to Layer 3 VPN. Layer VPN forwarding and Layer 3 VPN termination to Layer 2 VPN forwarding functions
[0008] At present, the functions of Layer 2 VPN termination to Layer 3 VPN forwarding and Layer 3 VPN termination to Layer 2 VPN forwarding are mainly realized through two devices, PE1 / 2 functions, one device performs Layer 2 VPN termination and forwarding functions, and another One device performs Layer 3 VPN forwarding and termination functions. This solution requires the use of two devices, and the cost is relatively high.

Method used

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  • Method and device for forwarding virtual private network message
  • Method and device for forwarding virtual private network message
  • Method and device for forwarding virtual private network message

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Embodiment Construction

[0040] This embodiment uses port aggregation (TRUNK), configures the ports under the TRUNK as a self-loop, realizes forwarding from uplink Layer 2 VPN termination to Layer 3 VPN, and downlink Layer 3 VPN termination to Layer 2 VPN forwarding. Balanced, it well supports common networking applications of Layer 2 VPN and Layer 3 VPN.

[0041] In this embodiment, the uplink message (L2VPN to L3VPN) enters the switch chip for the first time to realize Layer 2 VPN termination and is sent to the trunk, and the port configured as the inner ring under the trunk sends the message after layer 2 termination to the switch chip again Layer 3 VPN forwarding; downlink packets (L3VPN to L2VPN) enter the switch chip for the first time to achieve Layer 3 VPN termination, and send them to the TRUNK. Layer 2 VPN forwarding to the switch chip. Uplink and downlink packets can use the same trunk, and the ports under the trunk are all set to self-loop.

[0042] Port aggregation refers to adding one ...

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PUM

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Abstract

A method and device for forwarding message of virtual private network. The method comprises: a Network Provider Edge Router(PE) carries out two-layer Virtual Private Network(VPN) conclusion on an uplink message received from a two-layer VPN and sends the uplink message subjected to the two-layer VPN conclusion to a port configured as a self loop; the PE receives the uplink message looped by the port configured as the self loop and subjected to the two-layer VPN conclusion and carries out three-layer VPN forwarding on the uplink message subjected to the two-layer VPN conclusion. According to the method and device, the two-layer VPN conclusion to the three-layer VPN forwarding is enabled by adopting a port trunking, uplink and downlink can be distinguished by only using one port trunking in a two-layer VPN and three-layer VPN networking, and therefore, the number of used networking equipment is decreased, the complexity of a networking is reduced, maintenance and management cost is saved and networking becomes more flexible.

Description

technical field [0001] The invention relates to the technical field of virtual private network (VPN), in particular to a method and device for forwarding virtual private network messages. Background technique [0002] At present, the MPLS (Multi-Protocol Label Switching) network is the development direction of the next-generation core network. Among the various VPN methods using MPLS technology, the most competitive ones are MPLS Layer 2 VPN and MPLS Layer 3 VPN. MPLS Layer 2 VPN is to transparently transmit the customer's Layer 2 data on the MPLS network. [0003] From the customer's point of view, the MPLS network is a Layer 2 switching network through which Layer 2 connections can be established between different nodes. MPLS Layer 2 VPN separates the management responsibilities of the network. The PE of the network operator (the edge equipment of the operator's backbone network) is only responsible for the connection and forwarding of the second layer between the custome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L45/74H04L47/41
CPCH04L12/4633H04L45/245Y02B60/33H04L12/46H04L45/00Y02D30/50
Inventor 徐小春
Owner ZTE CORP
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