General Troubleshooting Guide
The applications people say it's the network, and the network people say it's the application.
Here are a few helpful hints.
It's a network problem:
1) If the source's IP ID is constant in the frame and the TCP Sequence number is constant as well, then the network is usually at fault because the frame appears to be looping.
Check to see if the frames' IP TTL field is decrementing.
2) If the source's IP ID is unique and the TCP Sequence number is constant, then the destination or the network in between source and destination may be at fault as it does not appear to be acknowledging or responding.
It's an application problem:
1) If the source's IP ID is unique and the TCP Sequence number is unique as well, yet the application call is being continually repeated with no discernible change, then the application on the client or server side may be at fault. If the client continues to request the same data, the server will provide it without question. This is because the server can only serve what the client requests; the client must initiate a new application call to be served new information.