The disclosure relates to quality of service (QOS) features for a router. The router may determine whether a congestion level of a first interface of the set of network interfaces exceeds a threshold level. Responsive to the congestion level exceeding the threshold level, the router activates a traffic analyzer configured to identify a first session that is present in the data traffic and inserts a set of packets that are part of the first session into a first queue of the set of queues via an expedited communications path over a bus. The router also forwards the set of packets in accordance with the desired quality of service.