Packet simulation for QoS testing

[Steven Williams]

Does anyone know if there is an application out there that can do things like send QoS tagged over a network? I'm struggling to figure out how i can test my qos policies before taking them to a real network. 

[Georg Pauwen]

Hello Steven

Ostinato for GNS3 would be an option, it is open source and free.

https://www.gns3.com/marketplace/software/packet-traffic-generator-and-analyzer

[Joseph W. Doherty]

Depending on your needs, Cisco devices advanced ping will allow you to set the ToS value.

[Steven Williams]

I guess my needs are that if I create a QoS Policy to drop or reclassify certain tags I need to make sure its working as expected.