Assume you have an oVirt cluster with hundreds of VM networks. Now you add a new host to the cluster. In order for it to move to the Operational state, it must have all required networks attached to it. The easiest way to do it is to attach networks to a label, and then place that label on a NIC of the added host. However, if there are too many networks, Engine could fail to setup them all at once. This is caused by a slow VDSM setupNetworks call that is not able to finish within the 180 seconds long vdsTimeout of Engine.

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