The growth of connectivity in general, including in networked embedded systems, is continuously increasing the amount and diversity of information that needs being exchanged among nodes. The arrival pattern of such traffic is also frequently bursty and jittered, negatively impacting the system performance. In this paper we focus on switched Ethernet and we aim at providing flow-based dynamic scheduling that allows handling bursty and jittered traffic in a bandwidth efficient way. For that we use adaptive resource-reservation, associating servers to flows or groups of flows that contain the impact that a misbehaving flow can have. These servers can be adapted on-line to make a better use of the available bandwidth.