> Am 04.12.2018 um 21:30 schrieb Günther J. Niederwimmer: > > Hello, > > is this only my mistake,or can help any from the list? > > > > I have 3 host computer on different places, but all have the Problem when > > starting a client "KVM" to connect to the bridge from the host. > > > > It is near not possible to start a client, only after 10-20 > reboot/restart > > from the client's the network is starting correct? KVM/Linux bridging often defaults to have spanning tree enabled which many switches do not like. Try creating the bridge and disable spanning tree?