Evaluating TCP BBRv2 on the Dropbox edge network
The improved ss output mentioned in the paper has helped me immensely tracking down what was limiting the upload speed from a corporate net to AWS. Turned out no middleboxes were to blame, just a misconfiguration in nginx (receiving side) limiting the http2 send window (sender side). Yes, http2 has a separate send window on top of tcp. Yet another source of errors.