On Thu, 2016-04-14 at 16:44 +0200, Jiri Kosina wrote: > Hi, > > I've came across the behavior where adding a child qdisc and then deleting > it again makes the networking dysfunctional (I guess that's because all of > a sudden there is absolutely no working qdisc on the device, although > there originally was a default one in the parent). > > In a nutshell, is this expected behavior or bug?
This is the expected behavior. If the kernel was suddenly doing a 'replace' when you ask a delete, then the scripts doing a delete , than a add would break. tc users are skilled admins ;)