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A method and device for path switching according to memory alarm

A technology of path switching and memory, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., to achieve the effect of smooth flow and avoid data packet loss

Active Publication Date: 2016-08-10
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During this period, because router B has cleared all dynamic running data, there is a large amount of packet loss in the traffic from router A to router D

Method used

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  • A method and device for path switching according to memory alarm
  • A method and device for path switching according to memory alarm
  • A method and device for path switching according to memory alarm

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Embodiment Construction

[0067] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0068] Compared with the prior art, when the system memory of the network device is insufficient, it only responds to the system memory of the network device entering the three-level (critical) memory alarm. The present invention makes full use of the multi-level memory alarm notification mechanism. , Neighbor traffic migration is performed in advance, so as to realize smooth traffic migration when the system memory of the device is insufficient, and avoid data packet loss during path switching.

[0069] The present invention is applied to a network device, and the network device supports three levels of memory alarm thresholds and normal operation thresholds, the memory alarm thresholds of the three levels decrease in turn corresponding to the remaining free memory space. When the remaining free memory space of the network device is less than or equal to the third-l...

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Abstract

The present invention provides a method and device for path switching based on memory alarms. When the remaining free memory space of the network device is less than or equal to the third-level memory alarm threshold, a critical flag is added, and the remaining free memory space of the network device is greater than or equal to If it is equal to the normal operation threshold, delete the critical flag. The method includes: judging whether the remaining free memory space of the network device is less than or equal to the second-level memory alarm threshold and greater than the third-level memory alarm threshold. If yes, further judge whether it has a critical flag. If there is no critical flag, the network device adopts the control policy of maintaining the neighbor network device and triggering the traffic migration of the neighbor network device to the backup path. When the device enters the state of insufficient memory, the IGP protocol notifies the neighbors to perform traffic migration and switch to the backup path, so as to realize the smooth migration of traffic in the state of insufficient system memory of the device.

Description

technical field [0001] The invention relates to the field of memory alarms of the IGP protocol, in particular to a method and device for path switching according to memory alarms. Background technique [0002] The IGP protocol will monitor the size of the remaining free memory in real time. When the condition is met, a corresponding alarm or alarm release notification will be generated to notify the associated business module or process to take corresponding measures to maximize the use of memory and ensure that the device of normal operation. The device supports three levels of memory alarm thresholds: Level 1, Level 2, and Level 3. The corresponding remaining free memory is getting less and less, and the degree of urgency is getting more and more serious. The associated module can take different responses according to the received alarms of different levels. . In normal operation state, the system memory of the device is at the threshold of normal operation. When the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/801
Inventor 林长望
Owner NEW H3C TECH CO LTD
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