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Method for checking pseudo wire trouble of two-layer special network

A layer 2 virtual, private network technology, applied in the field of network communication, can solve the problem of inconsistent PW2 status

Active Publication Date: 2008-04-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] If a fault is detected on LSP2, because PW2 is on LSP2, PE1 can determine that PW2 is faulty; on PE2, LSP3 is not faulty, so PE2 does not think that PW2 is faulty, and the states of PW2 detected by the two PEs are inconsistent.

Method used

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  • Method for checking pseudo wire trouble of two-layer special network
  • Method for checking pseudo wire trouble of two-layer special network

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Experimental program
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Effect test

Embodiment 1

[0034] In step 400, if the LSP failure detection has been run when the PW is established, the local PE in the present invention notifies the peer PE of the binding relationship between the PW and the LSP through the following scheme. When establishing a PW, the binding relationship between the PW and the LSP is carried in the label mapping message of the PW, and the above information is carried in the PW Interface Parameters TLV field, as shown in Table 1 for details.

[0035] Table I:

[0036] 0 1 2 3

[0037] 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

[0038] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

[0039] |Sub-TLV Type Length | OAM Type (BFD or MPLS OAM) |

[0040]+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

[0041] |My Discriminator for BFD, LSP ID for MPLS OAM |

[0042] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

[0043] Among them, Sub-TLV Type: TLV type;

[...

Embodiment 2

[0049] In step 400, if the LSP failure detection starts after the PW is established, the local PE in the present invention notifies the peer PE of the binding relationship between the PW and the LSP through the following scheme. After the BFD or MPLS OAM detection mechanism runs, the local PE notifies the peer PE of the binding relationship between the LSP and all PWs bound to the LSP through the LDP (Label Distribution Protocol) notification message. The details are shown in Table 2.

[0050] Table II:

[0051] 0 1 2 3

[0052] 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

[0053] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

[0054] |0| Notification (0x0001) | Message Length |

[0055] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

[0056] | Message ID |

[0057] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

[0058] | Status (TLV) |

[0059] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...

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Abstract

The invention discloses a method of detecting the phantom line fault of a double ply virtual private network. One terminal ISP internet edge router PE informs an opposite terminal ISP internet edge router PE of binding relation between the phantom line PE and label switching path LSP. The said opposite terminal PE receives the said notice information and records the said bonding relation. The said opposite terminal PE detects the LSP fault and determines the PW fault based on the said bonding relation. The spending and network bandwidth occupy little, and the phantom line fault is detected using LSP fault detection mechanism and the consistent of the detected state of the phantom line fault is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for detecting pseudowire faults in a two-layer virtual private network. Background technique [0002] A virtual private network (Virtual Private Network, hereinafter referred to as VPN) relies on an Internet Service Provider (Internet Service Provider, hereinafter referred to as ISP) and a Network Service Provider (hereinafter referred to as NSP), to establish a dedicated data communication in a public network. Network technology. According to the implementation level, it can be divided into Layer-2 VPN (Layer-2VPN, hereinafter referred to as L2VPN) and Layer-3 VPN (Layer-3VPN, hereinafter referred to as L3VPN). [0003] L2VPN provides Layer 2 VPN services based on packet-switching PSN (Packet Switched Network) networks (generally MPLS networks), enabling operators to provide Layer 2 VPNs of different media on a unified PSN network, such as ATM, FR, VLAN, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/24H04L12/46H04L12/56H04L45/28H04L45/50
CPCH04L45/28H04L43/0817H04L12/2856H04L45/50H04L45/00
Inventor 子康
Owner HUAWEI TECH CO LTD