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fd8e6b Viraj Alankar 2025-06-10 17:59:07
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# Improving video streaming over WAN
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[BBRv3](https://github.com/google/bbr/tree/v3) vastly improves reliability of video streaming over a high latency link.
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[CachyOS](https://cachyos.org/) is the only Linux distro that has this builtin to its kernel. It must be [enabled](https://github.com/CachyOS/linux-cachyos/issues/439) manually.
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## iperf3 examples
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### Without BBRv3 (default Debian 12 kernel)
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```
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[ ID] Interval Transfer Bitrate
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[ 5] 0.00-1.00 sec 1.15 MBytes 9.67 Mbits/sec
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[ 5] 1.00-2.00 sec 2.52 MBytes 21.1 Mbits/sec
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[ 5] 2.00-3.00 sec 1.78 MBytes 15.0 Mbits/sec
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[ 5] 3.00-4.00 sec 2.30 MBytes 19.3 Mbits/sec
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[ 5] 4.00-5.00 sec 1.24 MBytes 10.4 Mbits/sec
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[ 5] 5.00-6.00 sec 1.24 MBytes 10.4 Mbits/sec
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[ 5] 6.00-7.00 sec 1.55 MBytes 13.0 Mbits/sec
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[ 5] 7.00-8.00 sec 1.36 MBytes 11.4 Mbits/sec
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[ 5] 8.00-9.00 sec 1.37 MBytes 11.5 Mbits/sec
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[ 5] 9.00-10.00 sec 1.58 MBytes 13.3 Mbits/sec
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- - - - - - - - - - - - - - - - - - - - - - - - -
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[ ID] Interval Transfer Bitrate Retr
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[ 5] 0.00-10.17 sec 19.1 MBytes 15.7 Mbits/sec 288 sender
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[ 5] 0.00-10.00 sec 16.1 MBytes 13.5 Mbits/sec receiver
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```
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### With BBRv3
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```
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me@client:~$ iperf3 -c my.server.org -R
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Reverse mode, remote host my.server.org is sending
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[ ID] Interval Transfer Bitrate
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[ 5] 0.00-1.00 sec 764 KBytes 6.26 Mbits/sec
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[ 5] 1.00-2.00 sec 14.3 MBytes 120 Mbits/sec
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[ 5] 2.00-3.00 sec 13.7 MBytes 115 Mbits/sec
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[ 5] 3.00-4.00 sec 10.1 MBytes 85.0 Mbits/sec
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[ 5] 4.00-5.00 sec 12.2 MBytes 103 Mbits/sec
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[ 5] 5.00-6.00 sec 11.1 MBytes 93.0 Mbits/sec
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[ 5] 6.00-7.00 sec 12.4 MBytes 104 Mbits/sec
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[ 5] 7.00-8.00 sec 11.7 MBytes 98.1 Mbits/sec
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[ 5] 8.00-9.00 sec 13.6 MBytes 114 Mbits/sec
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[ 5] 9.00-10.00 sec 13.7 MBytes 115 Mbits/sec
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- - - - - - - - - - - - - - - - - - - - - - - - -
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[ ID] Interval Transfer Bitrate Retr
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[ 5] 0.00-10.16 sec 117 MBytes 96.3 Mbits/sec 900 sender
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[ 5] 0.00-10.00 sec 114 MBytes 95.3 Mbits/sec receiver
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```