I have designed and deployed Quality of Service (QoS) policies on Cisco routers and switches. This has included discovery work prior to policy design, policy deployment, and post-deployment assessment using packet sniffers (EtherPeek, OmniPeek, WireShark), and NetFlow. VoIP has been a present in all networks which I have designed QoS policies for. I received formal training in Cisco QoS from GlobalKnowledge.
NetFlow analyzers I have used include: NetFlow Tracker, Scrutinizer, WebView, LiveAction, and SolarWinds.