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Pseudo failure detection method and user boundary device

A user edge device and user edge technology, applied in the field of communications, can solve the problems of low detection speed, high requirements for PE equipment, and low reliability, and achieve the effect of reducing requirements, improving detection speed and detection reliability.

Active Publication Date: 2010-08-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that the above-mentioned prior art has at least the following problems: when the tunnel between PE devices fails, the fault information must be transmitted to the CE device by the PE device to which the CE device belongs, and then the CE device The device makes judgments based on the transmitted fault information, so the requirements for the PE device to which the CE device belongs are relatively high, and the detection speed is low and the reliability is also low.

Method used

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  • Pseudo failure detection method and user boundary device
  • Pseudo failure detection method and user boundary device
  • Pseudo failure detection method and user boundary device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 of the PW fault detection method between the CE device and the remote PE device of the present invention: This embodiment describes the basic flow of the PW fault detection method. Referring to FIG. 1, the method in this embodiment includes:

[0018] 101. The remote PE device sends a detection packet carrying an MPLS double label to the near-end PE device connected to the target CE device through the bearer tunnel of the PW under test between the target CE device.

[0019] 102. If the near-end PE device receives the detection packet, it removes the MPLS double label in the packet, converts the packet into a detection packet that can be processed by the target CE device, and sends it to the target CE device.

[0020] 103. If the target CE device does not receive a detection message for detecting the PW under test within a predetermined time, determine that the PW under test fails.

[0021] In the embodiment of the present invention, after receiving the detec...

Embodiment 3

[0037]Embodiment 3 of the PW fault detection method between the CE device and the remote PE device of the present invention: This embodiment is applicable to the situation where the PW to be tested is carried on multiple tunnels, and a detection message is sent on the PW to be tested, and the PW carrying the PW The tunnel may be updated in real time. This embodiment is similar to Embodiment 2 of the PW fault detection method between the CE device and the remote PE device in the present invention. The difference is that in this embodiment, the remote PE device passes the tested PW After sending a detection packet carrying MPLS double labels to the near-end PE device connected to the target CE device, if the tunnel used to carry the tested PW is switched, the remote PE device Sending a subsequent detection message carrying the MPLS double label to the near-end PE device through the switched tunnel. In this way, the tunnel carrying the PW under test is transparent to the detectio...

Embodiment 2

[0056] Embodiment 2 of the user edge device of the present invention: This embodiment is applicable to the situation where there are multiple pseudowires between the target CE device and the remote PE device. This embodiment is similar to Embodiment 1 of the user edge device of the present invention, and the difference is That is, the device may further include a switching unit, configured to switch the forwarding link between the remote PE device and the target CE device to a link between the two when the decision-making unit determines that the PW under test fails. on another PW.

[0057] Further, the detection message used to detect the PW under test may be a bidirectional forwarding detection BFD message.

[0058] In the embodiment of the present invention, after receiving the detection message, the near-end PE device does not need to judge whether the link is faulty, but directly forwards the detection message to the CE device, and the CE device directly communicates with...

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Abstract

The embodiment of the invention relates to the technical field of communication and discloses a pseudo wire PW malfunction detecting method between the client edge CE device and remote end facilitator edge PE device, compriseing: remote end PE device transmits detecting message carrying multi-protocol tag exchange MPLS double tags to the proximal end PE device connected to the target CE device via the bearing channel of the tested PW between the target CE devices; if the proximal end PE device receives the detecting message, the MPLS double tags are eliminated; after the message is transferred as detecting message which can be processed by the CE devices, the message is transmitted to the CE device; of the target CE device does not receive the detecting message of the tested PW in the predetermined time, the tested PW has malfunctions. The invention also discloses corresponding client edge device embodiment. The embodiment of this invention can enhance detecting speed and reliability of the pseudowire malfunctions between the CE device and remote end PE device.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a PseudoWire (PW) fault detection method between a Client Edge (CE) device and a remote Provider Edge (PE) device and a user edge device . Background technique [0002] Virtual Private LAN Service (VPLS for short) is a solution for providing Layer 2 virtual private network services on Ethernet. Usually, in a VPLS network, different user groups are mapped to different LANs, and a virtual link is used between any two PE devices. Packets are transmitted through tunnels and pseudowires between PE devices. After the message reaches another PE device from one PE device, it will not be forwarded to the third PE device, avoiding network loops, and CE devices generally play the role of converging users in the network. For the convenience of description, the PE device to which the CE device belongs is called a near-end PE device, and the PE device connected to the near-end...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/46H04L12/56H04L45/50
Inventor 王鹏子康常继百陈亮
Owner HUAWEI TECH CO LTD