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Method and apparatus for inhibiting bidirectional forwarding detection link oscillation

A two-way forwarding detection and link technology, applied in the field of IP network communication, can solve the problems of network interruption, continuous recalculation and switching of forwarding routes, etc., and achieve the effect of suppressing link oscillation

Active Publication Date: 2012-01-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] The embodiment of the present invention provides a method and device for suppressing bidirectional forwarding detection link oscillation, which is used to solve the problem that when the network condition is poor, the BFD link enters the oscillation state, which causes the forwarding route to be recalculated and switched continuously, resulting in The problem of continuous interruption

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  • Method and apparatus for inhibiting bidirectional forwarding detection link oscillation
  • Method and apparatus for inhibiting bidirectional forwarding detection link oscillation
  • Method and apparatus for inhibiting bidirectional forwarding detection link oscillation

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Embodiment Construction

[0055] A method and device for suppressing bidirectional forwarding detection link oscillation provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0056] by image 3 The application scenario shown as an example, image 3 In the shown application scenario, the hardware part of routing and forwarding includes two routers (which may also be switches or other forwarding devices) supporting the BFD function and another router R3.

[0057] Router R1 also has the function of supporting configuration of static routes, associating with BFD, and supporting IP Fast Reroute Framework (IP FRR). Configure two static routes on the interface connecting router R1 to the access network, and specify different priorities. The high-priority next hop points to the interface address of the R2 device, for example (142.0.0.2), and the next-priority next hop Point to the address of the interface connecting router R3 and R1. Router R1 and ...

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Abstract

The invention discloses a method for inhibiting oscillation of a bidirectional forwarding detection link and a device thereof. The method comprises steps of periodically monitoring the session state of bidirectional forwarding detection (BFD) of a first device; calculating the frequency value of the BFD session state which is changed from a state through a state switch to the original state; whenthe frequency value is bigger than or equal to a set threshold value, the BFD session is inhibited to be switched to the next state. A problem that under a bed network station, when the BFD link enters an oscillation state, the forwarding routing is re-calculated and re-switched continuously, continuous cutoff of network will occur, is solved by using the device and method of inhibiting oscillation of the bidirectional forwarding detection link.

Description

technical field [0001] The invention relates to the technical field of IP network communication, in particular to a method and device for suppressing bidirectional forwarding detection link oscillation. Background technique [0002] In network communication, in order to select the fastest and best forwarding path faster and better, the demand for fast detection of communication failure between adjacent systems is increasing, and it is becoming more and more important. [0003] In the absence of hardware signal transmission, in previous routing protocols, the detection mechanism of sending HELLO (a message for detecting link) messages is usually used, but under the detection mechanism of HELLO messages, due to The detection interval is generally greater than 1 second. For some special applications, the detection interval is too long to detect and discover the link state that occurs in a short period of time. When the routing protocol is not running, It is also impossible to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/26H04L12/24
Inventor 张磊韦红波何辉
Owner ZTE CORP