MPLS-based method and device for line speed mutual forwarding of two-layer VPN and three-layer VPN

A wire-speed, three-layer service technology, applied in the field of network communication, can solve the problems of inability to realize wire-speed mutual transfer and occupy bandwidth, and achieve the effect of small occupied bandwidth and optimized logic

Inactive Publication Date: 2013-09-25
SUZHOU CENTEC COMM CO LTD
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  • Abstract
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Problems solved by technology

This method of realizing mutual transfer of data between L2VPN network and L3VPN network requires two lookups. For the network p...

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  • MPLS-based method and device for line speed mutual forwarding of two-layer VPN and three-layer VPN
  • MPLS-based method and device for line speed mutual forwarding of two-layer VPN and three-layer VPN
  • MPLS-based method and device for line speed mutual forwarding of two-layer VPN and three-layer VPN

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Embodiment Construction

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0028] The MPLS-based two-layer and three-layer VPN wire-speed mutual conversion method disclosed by the present invention is used for network equipment to L2VPN→L3VPN wire-speed mutual conversion. to combine image 3 and Figure 4 as shown, image 3 , Figure 4 They are respectively a schematic diagram of the L2VPN→L3VPN wire-speed mutual conversion process and a schematic diagram of the message processing process in the embodiment of the present invention. This embodiment can be applied to at least any chip or CPU software in ASIC, FPGA, and NP. This embodiment specifically includes the following Several steps:

[0029] The PE device terminates the received L2VPN (Layer 2-based virtual private network) message. Specifically, the PE device first receives the L2VPN message sent b...

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Abstract

The invention discloses an MPLS-based method for line speed mutual forwarding of a two-layer VPN and a three-layer VPN. The MPLS-based method for line speed mutual forwarding of the two-layer VPN and the three-layer VPN comprises the following steps that a PE device conducts message finalization on a received L2VPN message, a VC label is expanded to be associated with VRF, mutual forwarding of the L2VPN message and an L3VPN message is achieved, routing lookup is conducted directly, and the packaged L3VPN message is forwarded. The invention further discloses an MPLS-based device for line speed mutual forwarding of the two-layer VPN and the three-layer VPN. The device comprises an L2VPN message finalization unit, a L2VPN/L3VPN associated unit and an L3VPN message forwarding unit. According to the MPLS-based method and device for line speed mutual forwarding of the two-layer VPN and the three-layer VPN, a route needs to be looked up only for one time, the finalization of the L2VPN message can be achieved, and the L2VPN message can be packaged to be the L3VPN message and is forwarded into an L3VPN network, so that logic of message forwarding is optimized, the message can be looked up only for one time and has no need to be returned and processed, occupied bandwidth amount is small, and the fact that line speed mutual forwarding of the two-layer VPN and the three-layer VPN is conducted on the PE device is achieved.

Description

technical field [0001] The invention relates to the field of network communication, in particular to an MPLS-based method and device for two-layer and three-layer VPN wire-speed mutual conversion. Background technique [0002] The virtual private local area network includes multiple provider edge routers (Provider Edge, PE) and user edge routers (Customer Edge, CE) interconnected with these PE devices. ) to transmit data frames, and a certain access link (Attachment Circuit, AC) is used to transmit data frames between the PE equipment and each CE equipment. [0003] With the development of network technology, especially the rise of MPLS VPN technology, the core equipment in the network needs to have the ability to exchange data between the L2VPN network and the L3VPN network. On a network processor (such as an ASIC or NP), see figure 1 as shown, figure 1 It is a schematic diagram of the existing L2VPN→L3VPN mutual transfer network, in which PE1-PE2-PE3 constitutes an L2VP...

Claims

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Application Information

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IPC IPC(8): H04L12/46H04L12/723H04L45/50
Inventor 何志川李占斌赵茂聪蔡文俊
Owner SUZHOU CENTEC COMM CO LTD
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