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Message handling method carried with multilayer labels and an exchanger

A message processing and switching technology, applied in the field of communication, can solve problems such as processing flow failure and inability to handle multi-layer labels, and achieve the effect of solving the limitations of hardware logic

Active Publication Date: 2009-11-25
NEW H3C TECH CO LTD
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  • Abstract
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Problems solved by technology

[0013] The method of circumvention through configuration limits the application model of the device, and also limits the location of the device. To realize the PHP function, the device can only be the last hop device in the MPLS backbone (MPLS Backbone) cloud, because if the If it is deployed before the last hop, the processing flow may fail because it cannot handle multi-layer labels. This limitation is unacceptable for high-performance layer-3 switches.

Method used

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  • Message handling method carried with multilayer labels and an exchanger
  • Message handling method carried with multilayer labels and an exchanger
  • Message handling method carried with multilayer labels and an exchanger

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Embodiment Construction

[0053] For the above-mentioned defects in the prior art, the present invention proposes a technical solution for realizing message processing of multi-layer labels by adding loopback port settings. The purpose of the present invention is to solve the defect that the device does not support continuous pop-up of multi-layer labels, ensure that the device can continuously pop-up multi-layer labels, and is not affected by configuration avoidance and device location restrictions, and the device can be placed in the MPLS Backbone cloud any location.

[0054] First of all, in the existing three-layer switch, the general pipeline (Pipeline) processing flow is as follows: image 3 shown.

[0055] From such as image 3 It can be seen from the shown Pipeline processing flow that after the message is exchanged and processed at the L2 layer and routed at the L3 layer, it can also be logically modified by the IFP according to the set Ingress Filter Processor (IFP). Various operations suc...

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Abstract

The invention discloses a message handling method carried with multilayer labels and an exchanger, applied to a system containing an exchanger in which ASIC chip does not have the ability of continuously flipping multilayer labels. The exchanger establishes at least one IFP logic according to the number of labels capable of being continuously flipped by the ASIC chip, and handles the message carried with multilayer labels according to the IFP logic so as to realize flipping handling of multilayer labels flexibly through the manner of port loopback, thereby improving the handling ability of exchanger and ensuring the success of message handling process.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a message processing method and a switch carrying multi-layer labels. Background technique [0002] In the prior art, high-performance Layer 3 switches all implement advanced Multi-Protocol Label Switching (Multi-Protocol Label Switching, MPLS) functions, but compared with routers that also have MPLS functions, the difference between the two is that , the MPLS function in the switch is generally implemented by an application specific integrated circuit (ASIC) chip, while in a router, it is generally implemented by a network processor (Network Processor, NP) or a high-performance central processing unit ( Central Processing Unit, CPU) to achieve. [0003] It is precisely because of this difference that in the switch, due to the limitation of the hardware logic of the ASIC chip, some functions cannot meet the specific needs of the implementation of the application, such as: ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L45/50
Inventor 韩立峰
Owner NEW H3C TECH CO LTD
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