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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > Flapping routes

Flapping routes

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Updated October 3, 2017


This article provides information on the Flapping routes resource in NPM.


  • NPM11.5 and later


The term “flapping” refers to a condition where a Router advertises a destination network via a particular route and then quickly sends another advertisement for a different route. When interfaces on a router go up and down unexpectedly or more frequently than they should, this causes a recalculation of routes in your Routing Tables. This actually slows down routing, and the slow network speed may result in outages or other connectivity issues.

The above is drawn from the following THWACK article that goes on to describe the various Routing resources available in NPM: 


As of NPM 12.3 release it is not possible to setup alerts for flapping routes, you can open a ticket with support to log this as feature request and also vote here.




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