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Method and equipment for failure notification

A fault notification and fault technology, applied in the field of communication, can solve the problems that the fault information and cause cannot be transmitted to the leaf nodes, and the fault information cannot be obtained by the leaf nodes, so as to ensure normal operation and improve reliability.

Inactive Publication Date: 2009-06-10
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In the process of realizing the present invention, the applicant finds that the prior art has the following defects at least: the LDP / mLDP protocol notifies the failure in the protocol processing process by the Notification message, but generally only limited to two adjacent label switching routers (Label Switch Router, LSR), when the faulty label switching router or the direct downstream node of the faulty path discovers the fault, the node that finds the fault notifies its own upstream node through the Notification message. According to the current LDP / mLDP protocol regulations, The failure information and cause cannot be passed on to the leaf node, and the leaf node cannot be informed of the failure information in time

Method used

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  • Method and equipment for failure notification
  • Method and equipment for failure notification

Examples

Experimental program
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Embodiment 1

[0027] Embodiment 1, a method for fault notification, see figure 1 , the method includes:

[0028] 101. Detect whether a failure occurs in a multicast LSP, where the multicast LSP is established based on a multicast label distribution protocol (mLDP).

[0029] The process of establishing a P2MP LSP through mLDP is different from detecting whether a multicast LSP fails after the establishment is successful. The following introduces them respectively:

[0030] In the process of establishing a P2MP LSP through mLDP, each intermediate node detects whether a fault occurs, usually by detecting the state of its own direct upstream node or the path between the direct upstream node, and the cause of the fault may include whether there is no routing or label space Whether it is wrong or not supporting P2MP, among them, whether there is no route can include: whether the route to the head node cannot be calculated, whether the label space is wrong can include: whether the label space is ...

Embodiment 2

[0051] Embodiment 2, a switching device is used to notify the failure of the multicast label switching path established based on the multicast label distribution protocol, see image 3 , the switching equipment includes: (adaptive modification will be made after the method claim modification is confirmed)

[0052] The detection unit 301 is configured to detect whether a multicast LSP fails, and the multicast label switching path is established based on a multicast label distribution protocol;

[0053] The information unit 302 is configured to send fault information to the downstream node of the multicast tree where the fault point is located when a fault is detected; after being forwarded by one or more downstream nodes, the fault information reaches the leaf node.

[0054] Among them, the information unit includes:

[0055] an information generating subunit, configured to generate a fault notification message, where the fault notification message is used to carry the fault i...

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Abstract

The invention discloses a method and a device for notifying fault. The method comprises: when detecting that a multicast label switching path is in fault, sending fault information to a downstream node of a multicast tree where a fault point is positioned, and establishing the multicast label switching path based on a multicast label distribution protocol; and transmitting the fault information to a leaf node through the downstream node. By adopting the method and the device for notifying the fault, after a multicast LSP established on the basis of the multicast label distribution protocol is in fault, the method sends the fault information to the downstream node of the multicast tree where the fault point is positioned, and the downstream node after receiving the fault information continuously transmits the fault information according to conditions, so as to finally transmit the fault information to the leaf node; and after the leaf node acquires the fault information, proper measures can be taken to ensure normal running of service and improve reliability of a network.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and equipment for fault notification of a multicast label switching path established based on a multicast label distribution protocol. Background technique [0002] Multicast technology (Multicast) is a one-to-many multi-party communication method. Different from the commonly used unicast technology, the multicast technology can greatly reduce the consumption of network resources by multi-party communication by establishing an optimal multicast forwarding path and reducing the duplication of data content. The core issue of multicast technology is the construction of multicast forwarding tree. The multicast forwarding tree is a forwarding path established from one (or more) source nodes to multiple receiving nodes, and multicast data is transmitted on the network through the multicast forwarding tree to achieve the purpose of optimizing forwarding efficiency. [0003] There ar...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/56
CPCH04L45/22H04L41/06H04L45/50H04L45/28H04L49/201H04L49/557H04L45/16
Inventor 曹玮陈国义
Owner HUAWEI TECH CO LTD
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