There are various aspects in Quality of Service management. In this draft, we address the problem of bandwidth allocation and reservation over shared media (e.g. an Ethernet network). In order to do so, we define a protocol (CLEP: Controlled Load Ethernet Protocol) in charge of the management, allocation and fair sharing of the available bandwidth among users of the network. The load control is done via token bucket filters on outgoing interfaces of network elements. Our protocol efficiently manages the parameters of the token buckets in order to perform admission control. This service can be used alone, or with the Resources Reservation Protocol RSVP. The distributed algorithm is described in section 4 and an implementation framework of this proposal is given in section 3.