Method and device for realizing different IP data packet repeating using strategic flow

A technology of data packets and forwarding and publishing, which is applied in the direction of data exchange network, digital transmission system, telephone communication, etc. It can solve the problems of complex equipment, long development cycle of edge equipment, and inability to guarantee service quality, etc., and achieve the effect of improving forwarding efficiency

Inactive Publication Date: 2005-05-04
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] 1. The complex processing of data packets by MPLS at the edge nodes is the same as packet-based IP forwarding. It still needs to perform the longest match search on the LER to complete the mapping from FEC to Label, so the development cycle of edge devices is also caused Long and complex
[0017] 2. The realization of MPLS needs to introduce complex MPLS signaling, which greatly increases the development cost and maintenance cost of equipment
Therefore, using the MPLS protocol will cause problems in the interoperability of network devices.
[0019] 4. When DiffServ is used to guarantee the quality of service in MPLS, the quality of service cannot be guaranteed for each flow
[0020] 5. MPLS cannot support network address / protocol translation (NAT-PT), so direct interconnection between IPv4 and IPv6 networks cannot be realized

Method used

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  • Method and device for realizing different IP data packet repeating using strategic flow
  • Method and device for realizing different IP data packet repeating using strategic flow
  • Method and device for realizing different IP data packet repeating using strategic flow

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Embodiment Construction

[0058] Firstly, three technical solutions and four typical network topologies under the coexistence of IPv4 and IPv6 are introduced, then an algorithm for forwarding IPv4 and IPv6 that can satisfy the above three technical solutions and four network topologies is introduced, and finally, how to use policy flow way to implement the algorithm.

[0059] IEFT proposes three technical solutions on how to coexist IPv4 and IPv6: IPv4 / IPv6 dual-stack mode, tunnel mode and network address / protocol conversion mode. They are specified as follows:

[0060] IPv4 / IPv6 dual-stack mode: The dual-stack solution is actually to maintain two sets of routing protocol stacks, IPv6 and IPv4, in a router device, so that hosts in the network can support IPv6 and IPv4 protocols respectively, or support both protocols at the same time. The router can communicate with both IPv4 hosts and IPv6 hosts, and supports independent IPv6 and IPv4 routing protocols respectively. IPv4 and IPv6 routing information ...

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Abstract

Strategy stream mode adopted in the disclosed method and device is realized to support forwarding both IPv4 and IPv6 in same physical pipeline. Based on data stream types of different target IP, multielement attribute set of corresponding data packet is picked up, and strategy stream id is calculated. Forwarding entries of strategy stream is searched accurately based on the said id. If there is matched entry of strategy stream found, then modifying relevant content and forwarding operation are carried out according to the said entry. If there is no matched entry, then corresponding treatment is carried out for the data packet by control plane based on the attribute of the data packet. Synthesizing information in control plane and entry information related to applications generates a piece of forwarding entry for local strategy stream. The said generated forwarding entry is distributed to forwarding plane for latter data packet to use so as to avoid looking up packet of IPv4 or IPv6.

Description

technical field [0001] The present invention relates to a digital communication device, in particular to a data packet forwarding method and device, which adopt policy flow mode to simultaneously support IPv4 and IPv6 forwarding in the same physical pipeline. Background technique [0002] With the continuous development of Internet technology, many defects of the existing IPv4 network are gradually exposed, the most prominent of which are the problems that the IP address space will be exhausted and the backbone routing table will continue to grow. According to the current development speed of the Internet, IPv4 addresses will be allocated between 2005 and 2010. In order to thoroughly solve the current problems encountered by IPv4 and provide better support for future applications, the IPng Working Group of the Internet Engineering Team (IETF) proposed a proposal to modify the IP protocol. The new proposal is version 6 of IP, hence also known as IPv6. IPv6 has an address sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/715H04L29/06H04M11/06
Inventor 吉萌余少华
Owner FENGHUO COMM SCI & TECH CO LTD
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