Method and chip for message processing of layer 3 next-hop independent of layer 2 forwarding table

A technology of message processing and Layer 2 forwarding, which is applied in the field of information transmission, can solve problems such as long interruption time, and achieve the effect of improving forwarding quality

Inactive Publication Date: 2013-03-20
SUZHOU CENTEC COMM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Assume that the period from the link failure to the device detecting the link failure and deleting the FDB is represented by T1, and the period from the device deleting the FDB to re-learning the FDB is represented by T2, the service interruption time is T1+T2, and the interruption time is relatively short. long

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  • Method and chip for message processing of layer 3 next-hop independent of layer 2 forwarding table
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  • Method and chip for message processing of layer 3 next-hop independent of layer 2 forwarding table

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with various embodiments shown in the drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0036] ginseng figure 1 , figure 2 As shown, the present invention uses the loopback function of the chip to allow the message to enter the chip twice, and divide the search and edit action of the third layer and the search and edit action of the second layer into two times. The first pass ① processes the three-layer action, and the second pass Pass ② to deal with the action on the second layer.

[0037] The message processing method that the third-layer next hop is independent of the second-layer forwarding table is:

[0038] S1. Receive a message;

[0039] S2. Perform layer-3 editing on the message and forwar...

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Abstract

The present invention provides a method and a chip for message processing of a layer 3 next-hop independent of a layer 2 forwarding table, wherein the method comprises: S1, receiving a message; S2, performing a layer 3 editing for forwarding; S3, determining whether an FDB can be found via a destination MAC and VLAN; S4, if the FDB is found, performing layer 2 forwarding of the message; and if the FDB is not found, performing layer 2 broadcast of the message in the VLAN. Layer 3 forwarding information is enabled to be independent of the layer 2 forwarding information via the chip loopback function, and changes of layer 2 forwarding information are not allowed to affect the issue of the layer 3 forwarding information, to improve the forwarding quality of layer 3 services.

Description

technical field [0001] The invention relates to the technical field of information transmission, in particular to a message processing method and a chip in which the next hop of the third layer is independent of the forwarding table of the second layer. Background technique [0002] The Layer 3 forwarding information table of the Ethernet is usually an IP routing table, and the next hop of the IP routing table is a Layer 3 neighbor. educational. Neighbor entries are IP-to-MAC mappings. [0003] The Layer 2 forwarding information table of the Ethernet is usually the FDB table. The FDB table is learned when the data packet passes through the switch. The FDB table entry is the mapping from VLAN+MAC to the port. [0004] When the existing chip implements layer-3 forwarding, it only achieves the separation of routing and next hop, while the next hop and FDB are still combined together. When the FDB changes, the next-hop entry needs to be modified and re-delivered to the chip s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/741H04L45/74
Inventor 李占斌何志川
Owner SUZHOU CENTEC COMM CO LTD
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