Method for establishing DS-Lite tunnel and DS-Lite CGN

A tunnel and tunnel table technology, which is applied in the direction of data exchange, electrical components, transmission systems, etc. through path configuration, can solve the problems of heavy workload in traditional NAT technology transformation, cumbersome configuration of DS-Lite tunnels, etc., to solve the problem of heavy workload , avoid the effect of cumbersome configuration

Inactive Publication Date: 2012-03-14
NEW H3C TECH CO LTD
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Problems solved by technology

[0016] The present invention provides a method for establishing a DS-Lite tunnel, which can solve the problem of heavy workload in the transformation of traditional NAT technology, and avoid cumbersome configuration of t

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  • Method for establishing DS-Lite tunnel and DS-Lite CGN
  • Method for establishing DS-Lite tunnel and DS-Lite CGN
  • Method for establishing DS-Lite tunnel and DS-Lite CGN

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Embodiment Construction

[0035] The present invention proposes a method for automatically establishing a DS-Lite tunnel. When a DS-Lite CGN first receives an IPv6 message (that is, an Outbound direction message) from a CPE, it automatically establishes a DS-Lite tunnel with the CPE. In this mode, the tunnel can specify the IPv6 source address, but not the IPv6 destination address, which means that the tunnel of the DS-Lite CGN device allows any CPE with itself as the tunnel endpoint to access through the DS-Lite tunnel.

[0036] Such as figure 2 A flow chart of a method for automatically establishing a DS-Lite tunnel for the present invention, including:

[0037] Step 201: DS-Lite CGN receives the IPv6 message from the CPE, obtains the IPv6 source address of the IPv6 message, that is, the IPv6 address of the tunnel physical port of the CPE, and queries the local advance If the stored tunnel entry cannot be found in the query corresponding to the tunnel physical port IPv6 address of the CPE, continue...

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Abstract

The invention provides a method for establishing a dual-stack lite (DS-Lite) tunnel and a DS-Lite carrier-grade network address translation (DS-Lite CGN) device. The method comprises the following steps that: when a DS-Lite CGN has received an IPv6 message from customer premise equipment (CPE), if an item corresponded to an IPv6 address of a tunnel physical port of the CPE can not be queried in a tunnel item, a tunnel identifier corresponded to the IPv6 address of the tunnel physical port of the CPE is distributed and a DS-Lite tunnel between the CPE and the tunnel identifier is established; and moreover, the tunnel identifier is recorded in a network address translation (NAT) forwarding item. According to the invention, a problem on a large working load for transformation of a traditional NAT technology can be solved; and moreover, tedious configuration on a DS-Lite tunnel is avoided.

Description

technical field [0001] The present invention relates to the technical field of lightweight dual-stack (DS-Lite, Dual-Stack lite), in particular to a method for establishing a DS-Lite tunnel and a lightweight dual-stack bearer-level network address translation device (DS-Lite CGN) . Background technique [0002] IPv4 addresses are about to be exhausted. Although there are already IPv6 addresses and related technologies, due to factors such as existing network deployment and operator equipment return on investment, IPv6 network deployment cannot be completed overnight. IPv4 and IPv6 networks will last for a long time. co-exist. [0003] In order to alleviate the depletion speed of IPv4 addresses, DS-Lite technology is proposed. The deployment model of DS-Lite technology is based on the idea that multiple IPv4 clients can share one IPv4 address. The key to realizing this technology is to migrate the network address translation (NAT, Network Address Translation) function from ...

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Application Information

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IPC IPC(8): H04L12/46H04L29/12
Inventor 王佩龙温卫真
Owner NEW H3C TECH CO LTD
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