Quote:
Is this over TCP, UDP or something else ?


TCP. Our customer's got a T3 from their data centre, running to a router that is connected to a bunch of 384Kbps lines. The combined bandwidth of the 384Kbps lines exceeds 45Mbps.

We've got an application that runs at the other end of each of those 384Kbps lines. It's supposed to conserve bandwidth by monitoring how quickly its (SMB) requests are being serviced -- it uses this to get an idea of the available bandwidth and then backs off to only using a percentage of this.

However, their router is dropping packets, and not telling anybody about it, which means that the retry (I think) traffic is saturating the link, and our application isn't getting a realistic measure of the available bandwidth, which means it's not backing off properly.

So, I just wanted some terms to search for, so that I could get some general information about how these things should work.
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-- roger