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Maintenance method and device of route table

A technology for maintaining devices and routing tables, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as complex algorithms, routing Hash conflicts, and high power consumption, and achieve the effect of improving search efficiency

Active Publication Date: 2010-06-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] TCAM-based routing lookup is currently a popular high-speed routing lookup technology. TCAM lookup has the advantages of fast speed and simple operation, but at the same time it also has obvious disadvantages: high cost, high power consumption, and complex algorithms (involving For the movement of TCAM routing entries, it is necessary to ensure that the longest matching subnet route is in front of TCAM)
The current route maintenance method cannot guarantee the route lookup efficiency and solve the route Hash conflict problem at the same time

Method used

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  • Maintenance method and device of route table
  • Maintenance method and device of route table
  • Maintenance method and device of route table

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Embodiment Construction

[0035] The basic idea of ​​the present invention is: when there is a Hash conflict between the host route to be added and a certain route in the current host routing table, the host route to be added is added to the TCAM, thereby solving the Hash conflict problem between the host routes. In this way, for the host route, the host route can be searched through the Hash value, and for the subnet route, the TCAM parallel search can be performed. The routing table maintenance method of the present invention not only solves the problem of Hash conflicts between host routes, but also greatly improves the routing search efficiency.

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0037] figure 1 It is a flow chart of the host route adding method of the present invention, such as figure 1 A...

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Abstract

The invention discloses a maintenance method of a route table, comprising the step of: adding host routes to be added to a ternary content addressable memory (TCAM) when the host routes to be added conflict with the Hash values of routes in a host route table. The invention also discloses a maintenance device of the route table, comprising a determining unit and an adding unit, wherein the determining unit is used for determining whether the host routes to be added conflict with the Hash values of routes in the host route table or not, and the adding unit is triggered when the host routes to be added conflict with the Hash values of routes in the host route table; and the adding unit is used for adding the host routes to be added to the TCAM. The maintenance method of the route table solves the Hash conflict problem among the host routes and also greatly increases the route seeking efficiency.

Description

technical field [0001] The present invention relates to a routing table maintenance technology, in particular to a method and device for maintaining a routing table based on TCAM (Ternary Content Addressable Memory). Background technique [0002] With the rapid popularization of the Internet and the rapid development of router and router technology, the route lookup technology once became the main bottleneck restricting the improvement of network performance. The switch chip in the routing switch generally adopts hash (Hash) to search the host routing table, and generally uses TCAM to search the subnet routing table in parallel, thereby solving the problem of low routing search efficiency. [0003] TCAM-based routing lookup is currently a popular high-speed routing lookup technology. TCAM lookup has the advantages of fast speed and simple operation, but at the same time it also has obvious disadvantages: high cost, high power consumption, and complex algorithms (involving F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/74
CPCH04L45/7453H04L45/745H04L45/54
Inventor 潘庭山
Owner ZTE CORP