A network management system may allocate different amounts of bandwidth to different types of data traffic. The traffic types may be distinguished by their source device address, and whether the source device is part of, or external to, a first network. Packets may also be marked by their sender with information to identify a traffic type, and the marking may be used to determine the packet's treatment. The allocations given to the various types of traffic may be dynamically modified with changing traffic demands and conditions.