Capture IP Phone CDP messages & craft your own


Capture traffic using Wireshark and then import the pcap files into Ostinato; and then generate frames back into the network. In this example we will get Ostinato to generate Cisco IP Phone CDP messages .My Full CCNA course is here
Free software worth $200:
Ostinato - Network Traffic Generator Part 7. Easily create packets for testing in your GNS3 network.

Ostinato is a packet crafter, network traffic generator and analyzer with a friendly GUI. Also a powerful Python API for network test automation. Craft and send packets of several streams with different protocols at different rates. Think of it as “Wireshark in Reverse”.