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Fast route convergence method and related device

A routing and fast technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as slow routing convergence

Active Publication Date: 2010-02-03
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide a fast route convergence method to solve the problem of slow route convergence when link switching occurs in a triangular network

Method used

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  • Fast route convergence method and related device
  • Fast route convergence method and related device
  • Fast route convergence method and related device

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Embodiment Construction

[0026] image 3 A flow chart of a preferred embodiment of the fast route convergence method provided by the present invention is given. The same below figure 2 The routing convergence on the device 220 in the shown triangular network is taken as an example. At the same time, BGP (Border Gateway Protocol, Border Gateway Protocol) routing is taken as an example of routing that needs to rely on IGP routing (Interior Gateway Protocol, Interior Gateway Protocol). image 3 The fast route convergence method provided by the present invention is introduced in detail to help readers understand the above and other features and advantages of the present invention more thoroughly.

[0027] Such as figure 2 As shown, the device 210 and the device 220 have established a BGP neighbor relationship, and the next hop of the BGP route learned by the device 220 from the device 210 in the forwarding table is the address 1.1.1.1 of the physical interface where the device 210 is connected to the ...

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PUM

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Abstract

The invention discloses a fast route convergence method and device, applied to three-layer network equipment to speed up the route convergence initiated by link switching and comprising: when the nexthop of IGP route on the three-layer network equipment is switched from address 1 to address 2, judging whether there are only routes to the address 1 in need of depending on the IGP route: if yes, the transmission table on the three-layer network equipment switches the next-hop list item contents corresponding to the address 1 into the next-hop list item contents corresponding to the address 2. by directly modifying the next-hop list item contents in the transmission table, the invention implements once-off switching of all routes on the three-layer network equipment so as to make the route convergence time irrelated with the number of routes.

Description

technical field [0001] The invention relates to the route convergence technology in the communication network, in particular to a method and device for accelerating the route convergence when the link is switched. Background technique [0002] For Layer 3 network devices, the routing protocol is responsible for generating routes and delivering the routes to form a forwarding table to guide the forwarding of Layer 3 packets. Layer 3 message forwarding can be implemented by hardware such as NP (Network Processor, network processor) chip, ASIC (Application Specific Integrated Circuit, application specific integrated circuit) chip, and can also be implemented by software. Regardless of whether layer-3 message forwarding is implemented in hardware or software, the structure of the forwarding table is similar. [0003] figure 1 A schematic structure of the forwarding table is shown. Such as figure 1 As shown, prefix entries 110 with the same next hop pointer 111 point to the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/06H04L12/773
Inventor 章海峰潘凝
Owner NEW H3C TECH CO LTD