BBRv3 in the public Internet: a boon or a bane?
Danesh Zeynali, Emilia N. Weyulu, Seifeddine Fathalli, Balakrishnan Chandrasekaran, Anja Feldmann · 2024
The third version of the Bottleneck-Bandwidth and Round-trip (BBR) algorithm, BBRv3, is now the default CCA for all of the public Internet traffic from google.com and YouTube. In this work, we built upon our prior work [23] and examine BBRv3's ability to coexist with Cubic flows by taking loss, in the form of explicit congestion notification (ECN) signals, into account. Our evaluations reveal that, when ECN is enabled, a single BBRv3 flow can acquire more than ~99% of the bandwidth even when competing with five Cubic flows. Our findings have crucial implications for using BBRv3 in the public Internet.