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Message packaging method and method, device and network equipment for detecting forwarding loop

A packet encapsulation and packet technology, applied in the field of network communication, which can solve problems such as difficulty in checking forwarding loops

Inactive Publication Date: 2010-06-30
RUIJIE NETWORKS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention provides a message encapsulation method, a method, a device and a network device for detecting forwarding loops, which are used to solve the problem that it is difficult to detect forwarding loops in an ATM-based MPLS network because there is no place to store TTL in the cell header

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  • Message packaging method and method, device and network equipment for detecting forwarding loop
  • Message packaging method and method, device and network equipment for detecting forwarding loop
  • Message packaging method and method, device and network equipment for detecting forwarding loop

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Embodiment Construction

[0043] This paper proposes a packet encapsulation method in an ATM-based MPLS network and a method, device, and network equipment for detecting forwarding loops. The TTL mechanism is used in it, which can effectively detect routing loops when data packets are forwarded. The preferred embodiment of the invention.

[0044] Such as Figure 4 As shown, the message encapsulation method that the present invention proposes, comprises steps:

[0045] S401. Encapsulate the data received by the ingress routing node of the MPLS network into a message with a fixed format, and at the same time assign a label marking its forwarding mode to the message, and establish a label switching path for the message; S402, convert the message to The text is split into multiple information segments according to a fixed length; S403, in the splitting process of the message, determine the free field in the message of the fixed format, and set the time-to-live TTL of the message in the free field value; ...

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Abstract

The invention discloses a message packaging method and a method for detecting a forwarding loop. The message packaging method comprises the following steps of: packaging data received by an MPLS (Multi-Protocol Label Switching) network entry routing node into a message with a fixed format, and meanwhile, distributing a label to the message for marking the forwarding mode of the message; splitting the message into a plurality of information segments according to a fixed length; packaging the distributed label into a cell header and loading the cell header to the front of each information segment to obtain cells, wherein each cell also comprises an idle field in the message with a confirmed fixed format, and a TTL (Time to Live) value of the message is set in the idle field; and setting a survival identification for identifying whether the cell of the cell header has the idle field or not in each cell header. In the method for detecting a forwarding loop, received cells are detected whether to carry the TTL values or not by utilizing the survival identifications in the cell headers so as to achieve the purpose of detecting the forwarding loop by utilizing a TTL mechanism, and the forwarding loop is effectively detected under the condition of no occupation of the effective information bits of the cell headers.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a message encapsulation method in an ATM-based MPLS network, a method, a device and a network device for detecting forwarding loops. Background technique [0002] Multiprotocol Label Switching (MPLS) is a new technology that uses labels to guide high-speed and efficient data transmission on an open communication network. As a classified forwarding technology, MPLS classifies packets with the same forwarding processing method into one class, which is called Forwarding Equivalence Class (FEC). Packets of the same forwarding equivalence class will receive exactly the same treatment in the MPLS network. A label is a mark with a fixed length and only local significance. It is used to uniquely indicate the forwarding equivalence class to which a packet belongs, and determines the forwarding mode of the marked packet. A label switching router (Label Switching Router, LSR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/26H04L1/00H04L45/50H04L47/43
Inventor 彭凯
Owner RUIJIE NETWORKS CO LTD
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