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Path MTU discovery method and system facing to IPV6

A technology for discovering methods and paths, applied in transmission systems, digital transmission systems, electrical components, etc., and can solve problems such as excessive bandwidth load

Inactive Publication Date: 2009-10-07
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Moreover, the overload of bandwidth is also a severe test for the Internet

Method used

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  • Path MTU discovery method and system facing to IPV6
  • Path MTU discovery method and system facing to IPV6
  • Path MTU discovery method and system facing to IPV6

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Such as figure 1 As shown, the present invention provides an IPv6-oriented path MTU discovery method, the source node sends a message to the destination node through several intermediate forwarding nodes, and the destination node determines the path MTU after receiving the message and notifies the source node, The intermediate forwarding node obtains the outgoing interface link according to the received message, and judges the length of the message to be forwarded. When the length of the message to be forwarded is greater than the MTU value of the outgoing interface link, modify the content of the message and then Forward.

[0034] When the source node is going to...

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Abstract

The present invention discloses a path MTU discovery method and system facing to IPV6, the method is: transmits messages from source nodes to target nodes through a plurality of intermediate transmitting nodes, and then the target nodes receives the messages and determines the path MTU and notices the source nodes, the intermediate transmitting nodes gets an outgoing interface link according to the received messages and judges length of the messages to be transmitted, and if length of the transmitted messages is larger than MTU value of the outgoing interface link, modifying content of the messages and then transmitting. The invention provided path MTU discovery method facing to IPV6, a source node can obtain path MTU by one detection if no packet is lost, which improving detection speed and reducing messages for detecting and reducing network load.

Description

technical field [0001] The invention relates to the field of Internet IP router structure design, in particular to an IPv6-oriented path MTU discovery method and system. Background technique [0002] In the Internet network, different links have a corresponding Maximum Transmission Unit (MTU), and the length of the packet carried on the link cannot be greater than the corresponding MTU. The MTU mechanism of the fourth version of the international network communication protocol (Internet Protocol version 4, IPv4) stipulates that IP packets can be fragmented on intermediate nodes on the transmission path, and finally all fragments are reassembled after reaching the destination. The MTU mechanism of the sixth edition of the International Network Communication Protocol (Internet Protocol version 6, IPv6) has been greatly improved on the basis of IPv4. IPv6 fragmentation can only be generated at the sending end, and any router on the forwarding path is not allowed to communicate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L45/741
Inventor 肖融孙波何珺肖永康胡晓雁
Owner BEIJING NORMAL UNIVERSITY
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