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Method and device for path switching according to memory alarms

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

Active Publication Date: 2013-12-18
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method and device for path switching according to memory alarms
  • Method and device for path switching according to memory alarms
  • Method and device for path switching according to memory alarms

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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 invention provides a method and device for path switching according to memory alarms. When residual free memory space of a network device is smaller than or equal to a third-level memory alarming threshold, a critical mark is added, and when the residual free memory space of the network device is larger than or equal to a normal operation threshold, the critical mark is deleted. The method includes the steps that whether the residual free memory space of the network device is smaller than or equal to a second-level memory alarming threshold and larger than the third-level memory alarming threshold is judged; if yes, whether the critical mark exists is judged; if the critical mark does not exist, the network device adopts the control strategy of maintaining neighbor network devices and triggering flow of the neighbor network devices to be transferred to a standby path. According to the method, when the device enters a memory insufficiency state, the IGP informs the neighbor network devices to transfer the flow and switch the flow to the standby path, and therefore smooth flow transfer under the system memory insufficiency state of the device can be achieved.

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 Applications(China)
IPC IPC(8): H04L12/24H04L12/801
Inventor 林长望
Owner NEW H3C TECH CO LTD
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