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Method of universal route package for IP partitioned message

A general-purpose routing encapsulation and IP fragmentation technology, applied in the field of computer communication, can solve problems such as IP fragmentation and GRE encapsulation, and achieve the effect of improving versatility and node forwarding efficiency

Inactive Publication Date: 2007-02-14
ZTE CORP
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Problems solved by technology

[0005] Aiming at the problems and deficiencies that GRE encapsulation of IP fragments cannot be carried out on the intermediate nodes of message forwarding in the above-mentioned existing IP links, the purpose of the present invention is to provide a simple and general-purpose, high-forwarding efficient general-purpose IP fragmentation message. The method of routing encapsulation

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  • Method of universal route package for IP partitioned message
  • Method of universal route package for IP partitioned message
  • Method of universal route package for IP partitioned message

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] When the intermediate node needs to complete the encapsulation of the fragmented message in the IP network, it is necessary to consider whether the maximum number of bytes of the IP message (MTU) that can be transmitted after encapsulation (adding the corresponding tunnel protocol header) is exceeded. If the MTU is exceeded, then The new message needs to be repackaged, which will cause data loss. Therefore, it is necessary to limit the length of the message to the previous node to avoid overflow after re-encapsulation. However, if there are multiple protocol encapsulation nodes, the length of the message should be limited respectively from the source node to the end. Then complete the re-encapsulation of the fragmented message or non-fragmented message on each node. The encapsulation process of the IPV4 intermediate node in GRE mode is taken as an ex...

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Abstract

This invention discloses a method for packaging IP slice messages in general routes including:1, setting the maximum byte number of transmission IP messages of the last stage nodes before the central node necessary to package message in general routes let it smaller than or equal to the diference between the maximum transmission message byte and the general route packaged message head byte of said middle node, 2, the middle node receives said message to judge if the message is a slice one, if not, it cuts in the general route package message head before the message net charge and modifies the value of related field in the IP head of said non-sliced message to guarantee the correctness of it, if it is the slice message, then it judges if it is the first slice, if so, it treats it according to the mode for processing non-sliced messages, if it is not the first one, it modifies the value of related field in the IP head to secure the correctness of the IP message head.

Description

technical field [0001] The invention relates to the field of computer communication, in particular to a method for general routing encapsulation of IP fragmented messages in an intermediate node based on a tunnel protocol. Background technique [0002] The network tunneling protocol is used to implement data transmission between two network protocols, that is, to encapsulate a protocol message into another protocol. General Routing Encapsulation (GRE, General Routing Encapsulation) is one of the commonly used tunneling protocols. It not only supports the IP protocol, but also supports other types of network layer protocols, so it is widely used. During multi-protocol encapsulation, the data packet to be encapsulated in other protocol data packets as the payload is called the payload packet, and the outer layer data packet encapsulating other data packets is called the transport packet. RFC1701 and RFC1702 describe the encapsulation packet format of the GRE protocol, the for...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L45/74H04L45/741
Inventor 孙颂辉陈诗军周志雄
Owner ZTE CORP
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