Troubleshooting scenarios for IPTV applications
IPTV applications have become more and more popular over the last few years, while more and more TV stations are moving to the Internet. E-learning applications are also more popular along with various types of other applications.
Basically, IPTV applications use TCP, and the problems you will face are mostly TCP problems, such as retransmissions. In this recipe we will see some examples.
Getting ready
When getting complaints about quality of video, freezes, and so on, connect the instance of Wireshark that has a port mirror to the device or the link that connects you to the network.
How to do it...
Start the capture and go through these steps:
Open the IO graph and verify that you have buffering type of traffic, as illustrated in the following screenshot:
If you see that the line is blocked at the top, check your bandwidth to the Internet and tune the viewer accordingly (it's usually done automatically).
Check for TCP retransmissions, duplicate ACKs...
