WFVQ provides more fair service for data packets, and improves response time for interactive data applications (such as SSH or Telnet).
WFVQ is the default queueing mode for all FastEthernet interfaces for which traffic-shaping is enabled.
To disable WFVQ, you must enable another queueing mode, using either the voip-queue or the priority-queue command in interface context.
Note:
The fair-voip-queue and voip-queue commands are mutually exclusive, and cannot both appear in a configuration script.