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tcam-based ipv4/ipv6 routing capacity sharing method

An IPV6 routing and IPV4 technology, applied in the field of tri-state content addressable memory, can solve problems such as product version management, and achieve the effect of improving IPV6 routing specifications and efficient processing

Active Publication Date: 2017-03-15
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is necessary to customize different software versions for the two routers, which brings great problems to the management of product versions.

Method used

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  • tcam-based ipv4/ipv6 routing capacity sharing method
  • tcam-based ipv4/ipv6 routing capacity sharing method

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0018] The TCAM-based IPV4 / IPV6 routing capacity sharing method of the present invention includes:

[0019] Divide the TCAM hardware table into the front section area (part_hi) and the back section area (part_lo) for management, each area uses 80bit as the matching field of the route. Improve the matching method of traditional IPV4 and IPV6 routing, add IPV4 and IPV6 routing identifiers in the hardware settings, and include a distinguishing field (v6_flag) in the matching field of the 80bit routing, which is specially used to distinguish the table in the hardware table The route type matched by the entry. If the value of the distinguishing field is 1, the entry is used to match the IPV6 route; if the value of the distinguishing field is 0, the entry is used to match the IPV4 route.

[0020] Decompose a single IPV6 routing prefix into the firs...

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Abstract

A TCAM-based IPV4 / IPV6 routing capacity sharing method, involving tri-state content addressable memory technology: dividing the TCAM hardware table into a front section area and a back section area, decomposing a single IPV6 routing prefix into an IPV6 first half part and an IPV6 second half part; For IPV4 routing, first match the front area, if not, then match the back area; for IPV6 routing, first match the first half of IPV6 to the front area, if it matches, continue to match the second half of IPV6 to the back area. The invention realizes dynamic and flexible allocation of hardware table items in IPV4 / IPV6 routing, without customizing different software versions for the two routers, improves routing specifications and satisfies the needs of more routers.

Description

technical field [0001] The invention relates to a three-state content addressing memory technology, specifically a TCAM-based IPV4 / IPV6 routing capacity sharing method. Background technique [0002] With the development of modern networks and the popularization and use of VPN (Virtual Private Network, virtual private network) technology, modern high-performance routers have higher requirements for the number of supported routes. At the same time, with the rapid development of the Internet, the limited address space defined by the original IPV4 network protocol has been exhausted, and the lack of address space will hinder the further development of the Internet. Supporting the IPV6 protocol will solve the problem of the number of network address resources, and also It clears away the obstacles in terms of quantity limitation for devices other than computers to connect to the Internet, and it will become an inevitable trend for the network to fully support the IPV6 protocol. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/741H04L45/74
Inventor 袁炳根徐剑辉董晶晶饶冀
Owner FENGHUO COMM SCI & TECH CO LTD
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