Method and system for realize fault detection in bidirectional path segment

A segment fault and path technology, which is applied in the field of bidirectional path segment fault detection to ensure the correctness

Inactive Publication Date: 2011-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the fault detection of bidirectional LSP segment, the above-mentioned problem still exists

Method used

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  • Method and system for realize fault detection in bidirectional path segment
  • Method and system for realize fault detection in bidirectional path segment
  • Method and system for realize fault detection in bidirectional path segment

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Embodiment Construction

[0043] figure 2 For the present invention realizes the flow chart of the method for bidirectional path section failure detection, as figure 2 shown, including the following steps:

[0044] Step 200: The sending node of the bidirectional path segment to be detected sends the TTL TLV along with the request message to the destination node.

[0045] The bidirectional path segment to be detected may be preset through the network management system, where the bidirectional path segment may be a pseudowire segment or an LSP segment. The bidirectional path where the bidirectional path segment to be detected is located may be a co-routed (co-routed) bidirectional path or an associated (associated) bidirectional path. The sending node may be S-PE, or T-PE, or LSR, and the destination node may be S-PE, or T-PE, or LSR.

[0046] In MPLS-TP, all OAM messages are encapsulated by an associated control channel (ACH), that is, transmitted through a control channel of the application layer....

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Abstract

The invention provides a method and a system for realizing fault detection in a bidirectional path segment. In the invention, when a transmitting node transmits a request message, a novel type-length-value (TLV) which is used by a receiving node of the request message for determining the number of hops between a response message created by the receiving node of the request message and the transmitting node of the request message, namely the initial value of the time to live (TTL) in a pseudowire (PW) or label switched path (LSP) label is carried by the request message. The middle node in the tested bidirectional path segment does not perform any treatment on the TLV, so when the request message arrives at a target node, the target node can determines the TTL value in the PW label or LSP label of the response message according to the TLV value; and thus, the correct arrival of the response message at the transmitting node of the request message as well as the correctness of the fault detection in the bidirectional path segment is guaranteed.

Description

technical field [0001] The invention relates to a connectivity detection technology, in particular to a method and system for realizing fault detection of a bidirectional path segment in a pseudo wire (PW) or a bidirectional LSP. Background technique [0002] PWE3 is an end-to-end Layer 2 service bearer technology, which belongs to point-to-point Layer 2 Virtual Private Networks (L2VPN, Layer 2Virtual Private Networks,). In the two provider edge (PE, Provider Edge) devices of the packet switching network (PSN, Packet Switched Network), PWE3 uses Label Distribution Protocol / Resource Reservation Protocol (LDP / RSVP, Label Distribution Protocol / ResourceReservation Protocol) as the signal To simulate various Layer 2 services at the Customer Edge (CE, Customer Edge) end through the tunnel, such as Asynchronous Transfer Mode (ATM, Asynchronous Transfer Mode), Time Division Multiplexing (TDM, Time Division Multiplexing), Frame Relay (FR, Frame Relay) and so on, so that the Layer 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26
Inventor 代雪会陈然韦红波
Owner ZTE CORP
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