Loop prevention method after RPR bridge fault recovery

A fault recovery and loop technology, applied in the field of network communication, can solve the problem of not proposing a clear solution, and achieve the effect of solving the loop problem and ensuring correct forwarding.

Inactive Publication Date: 2011-01-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And for the situation when there are two failure points, there is no clear solution in the existing scheme

Method used

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  • Loop prevention method after RPR bridge fault recovery
  • Loop prevention method after RPR bridge fault recovery
  • Loop prevention method after RPR bridge fault recovery

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Experimental program
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Embodiment Construction

[0040] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041]The present invention provides a method for avoiding loops after RPR bridge fault recovery. The method solves the problem of recovering one fault point when two fault points appear on an RPR bridge ring at the same time in the application scenario of RPR intersecting rings. Possible broadcast loop problems. The loop avoidance method after the RPR bridge fault recovers is to control the passage of data packets on the RPR ring through the cooperation between the fault recovery node and the cross-ring bridge device, so as to avoid the loop phenomenon on the RPR ring.

[0042] first please see again figure 2 , an example of an RPR bridge ring network, in which there are two intersecting RPR bridge rings, the two RPR bridge rings include RPR bridge device 1, RPR bridge device 2, RPR bridge device 3, RPR bridge device 4 and RPR span Ring b...

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Abstract

The method includes steps: (1) when learning that fault of the fault point in RPR bridge ring is recovered to normal, the method sets up maximal transmission unit value of the fault recovery node (FRN) to a prearranged value, and sends notification message in use for informing the fault point that the fault is recovered to transannular bridge device (TBD) in RPR bridge ring; (2) each RPR TBD in RPR bridge ring receives the notification message sent from FRN, as well as tests operating mode of each RPR TBD, and makes only one RPR TBD keep in main use state. Through cooperation between FRN and TBD, the invention ensures that transannular operation is forwarded correctly so as to solve loop issue occurs possibly after the fault point is recovered.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for avoiding loops after fault recovery of an RPR bridge. Background technique [0002] Resilient Packet Ring (RPR) technology is a new type of network architecture and technology designed to meet the requirements of packet-based MAN; it is a ring network composed of packet switching nodes, and adjacent nodes pass through a For fiber optic connections; its network topology is based on two rings transmitting in opposite directions. RPR has the following technical characteristics: 1. Effective multiplexing of transmission bandwidth; 2. Fast ring-bridge protection switching function; 3. Automatic topology discovery. [0003] A ring network formed by applying the RPR technology is called an RPR ring network, which can be called an RPR ring for short. The packet switching devices on the ring network are called RPR devices. When the RPR device uses the 48-bit M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/437H04L12/42
CPCH04L41/06H04L12/437
Inventor 张义龙刘艳春
Owner HUAWEI TECH CO LTD
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