Weighted Fair VoIP Queuing (WFVQ) combines Weighted Fair Queuing (WFQ) for data streams and priority VoIP queuing to provide the real-time response time that is required for VoIP.

WFQ applies to data streams to provide fair bandwidth distribution among different data streams, with faster response times for shorter packets that are typical for interactive applications, such as SSH. Priority VoIP queuing is applied to VoIP bearer and signaling traffic.

WFVQ is the default queuing mode for all serial interfaces for which frame relay traffic-shaping is not enabled, and all FastEthernet interfaces for which traffic-shaping is enabled. Also, this is the only queueing mode available on a per-PVC basis for serial interfaces when frame relay traffic shaping is enabled.