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BBR Congestion Control Development
BBR is a congestion control algorithm originally developed at Google.
For more information, see:
https://github.com/
google/bbr
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Jin-Hyeong Lee
,
Maksim Lanies
2
12/3/25
Request for Review: Dual-Loop Predictive Latency Controller Tested over BBRv1
Dear Dr. Jin-Hyeong Lee, Thank you for sharing your excellent work on Proactive Latency Control (PLC)
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Request for Review: Dual-Loop Predictive Latency Controller Tested over BBRv1
Dear Dr. Jin-Hyeong Lee, Thank you for sharing your excellent work on Proactive Latency Control (PLC)
12/3/25
Maksim Lanies
11/3/25
BBRv3 + FEC (Phase 1 & 3) Testing Results — +10% Goodput @ 5% Loss
Dear BBR Development Group, I'd like to share our recent Phase 1 & Phase 3 testing report on
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BBRv3 + FEC (Phase 1 & 3) Testing Results — +10% Goodput @ 5% Loss
Dear BBR Development Group, I'd like to share our recent Phase 1 & Phase 3 testing report on
11/3/25
Christopher Zeimke
, …
DR. MUHAMMAD AHSAN
4
10/20/25
thank you for bbrv3!
Wow, thanks so much for the explanation! My apologies for the incorrect assumption in my first post.
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thank you for bbrv3!
Wow, thanks so much for the explanation! My apologies for the incorrect assumption in my first post.
10/20/25
muhamm...@umt.edu.pk
,
Neal Cardwell
2
9/25/25
BBR v3 latest status
On Sun, Sep 21, 2025 at 10:43 PM <muhamm...@umt.edu.pk> wrote: Hi guys, Just wondering ,
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BBR v3 latest status
On Sun, Sep 21, 2025 at 10:43 PM <muhamm...@umt.edu.pk> wrote: Hi guys, Just wondering ,
9/25/25
muhamm...@umt.edu.pk
,
Neal Cardwell
4
8/5/25
Interesting observation on bbr v3 kernel and ss -tin
Hi, From the traces you provided, it looks like all connections that used BBR used BBR for their
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Interesting observation on bbr v3 kernel and ss -tin
Hi, From the traces you provided, it looks like all connections that used BBR used BBR for their
8/5/25
GANLIN TANG
,
Neal Cardwell
2
7/30/25
Question of mptcp with bbr
Hi, Thanks for the post! Can you please share some details about your experiments, to make it easier
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Question of mptcp with bbr
Hi, Thanks for the post! Can you please share some details about your experiments, to make it easier
7/30/25
ssw
, …
Neal Cardwell
5
6/18/25
Question on the loss threshold
On Wed, Jun 18, 2025 at 9:14 AM Maxim Ivanov <ma...@heroiclabs.com> wrote: Hello Neal, We see
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Question on the loss threshold
On Wed, Jun 18, 2025 at 9:14 AM Maxim Ivanov <ma...@heroiclabs.com> wrote: Hello Neal, We see
6/18/25
Simon
,
Neal Cardwell
2
5/23/25
CCA and linux reaction on demand
Hi Simon, Here are some quick takes on these questions. Of course the real answer would come from
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CCA and linux reaction on demand
Hi Simon, Here are some quick takes on these questions. Of course the real answer would come from
5/23/25
Keith Winstein
5/12/25
Draft paper on connection splitting and BBR (to appear at USENIX ATC)
Hello BBR team and all, Our students Gina Yuan and Thea Rossman have written a paper that will appear
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Draft paper on connection splitting and BBR (to appear at USENIX ATC)
Hello BBR team and all, Our students Gina Yuan and Thea Rossman have written a paper that will appear
5/12/25
Viraj Alankar
,
Bob McMahon
2
5/3/25
Linux distributions with BBRv3
I've just updated my l4sgear site. It would be good to compare bbrv3 and l4s. Needs to run on a
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Linux distributions with BBRv3
I've just updated my l4sgear site. It would be good to compare bbrv3 and l4s. Needs to run on a
5/3/25
Braden Bassingthwaite
, …
Daniel Micay
21
4/15/25
BBR v1 + XDP SYN Proxy in WAN has low throughput for 10s
On Wednesday, April 9, 2025 at 8:56:52 am UTC-4 Neal Cardwell wrote: (1) the TCP stack could have a
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BBR v1 + XDP SYN Proxy in WAN has low throughput for 10s
On Wednesday, April 9, 2025 at 8:56:52 am UTC-4 Neal Cardwell wrote: (1) the TCP stack could have a
4/15/25
Oleksandr Natalenko
4/7/25
BBRv3 for v6.15-rc1
Hello. While forward-porting BBRv3 for v6.15-rc1 I've bumped into the upstream commit
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BBRv3 for v6.15-rc1
Hello. While forward-porting BBRv3 for v6.15-rc1 I've bumped into the upstream commit
4/7/25
Li Zonglun
4/6/25
minRTT logics in ProbeRTT mode
Hi all, I found something interesting about the minRTT update when BBR is in its ProbeRTT mode.
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minRTT logics in ProbeRTT mode
Hi all, I found something interesting about the minRTT update when BBR is in its ProbeRTT mode.
4/6/25
Jyotirmoy Banik
, …
Роман
5
4/5/25
Rest in Peace, Dave!
RIP четверг, 3 апреля 2025 г. в 00:55:41 UTC+3, savet...@gmail.com: I was constantly fascinated by
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Rest in Peace, Dave!
RIP четверг, 3 апреля 2025 г. в 00:55:41 UTC+3, savet...@gmail.com: I was constantly fascinated by
4/5/25
muhamm...@umt.edu.pk
,
Bless, Roland (TM)
2
3/28/25
bbr v3 behavior on wired network on upload.
Hi, yes, it's a core feature of BBR to measure the RTT without queuing delay. Every 5s, a BBRv3
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bbr v3 behavior on wired network on upload.
Hi, yes, it's a core feature of BBR to measure the RTT without queuing delay. Every 5s, a BBRv3
3/28/25
Mihai Mazilu
3/26/25
BBRv2/v3 probe rtt
Hello, As I understand it, the probing of the rtt was decoupled from the min rtt window,, to provide
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BBRv2/v3 probe rtt
Hello, As I understand it, the probing of the rtt was decoupled from the min rtt window,, to provide
3/26/25
Роман
, …
Taifeng Tan
4
3/25/25
bbrv2 for online games on windows
You are right Ahsan - the congestion control algorithem works on the client side when the client is
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bbrv2 for online games on windows
You are right Ahsan - the congestion control algorithem works on the client side when the client is
3/25/25
Shehab Sarar Ahmed
, …
Taifeng Tan
7
3/24/25
BBR suddenly dropped in-flight packet to 0
hi Shehab, Sorry to jump in. Just in case you still want to discuss this issue. Here are my findings:
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BBR suddenly dropped in-flight packet to 0
hi Shehab, Sorry to jump in. Just in case you still want to discuss this issue. Here are my findings:
3/24/25
Viraj Alankar
, …
Neal Cardwell
13
3/24/25
Any way to use BBRv3 with newer kernels?
I recommend compiling the kernel from source. However, FWIW I've created kernel packages for my
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Any way to use BBRv3 with newer kernels?
I recommend compiling the kernel from source. However, FWIW I've created kernel packages for my
3/24/25
Neal Cardwell
3/24/25
"Challenges in Networking for AIML clusters" talk at IETF
Here's a "Challenges in Networking for AIML clusters" talk at IETF last week by Costin
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"Challenges in Networking for AIML clusters" talk at IETF
Here's a "Challenges in Networking for AIML clusters" talk at IETF last week by Costin
3/24/25
Li Zonglun
, …
Taifeng Tan
5
3/24/25
Long RTT Problem with BBRv1 and v3
Sorry to jump into the discussion, Zonglun. Just in case you need to troubleshoot another issue like
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Long RTT Problem with BBRv1 and v3
Sorry to jump into the discussion, Zonglun. Just in case you need to troubleshoot another issue like
3/24/25
Neal Cardwell
3/15/25
Linux TCP BBRv3 code rebased from 6.4-ish to v6.13.7 stable
I have rebased the Linux TCP BBRv3 code from net-next at ba2274dcfda859b8a27193e68ad37bfe4da28ddc (
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Linux TCP BBRv3 code rebased from 6.4-ish to v6.13.7 stable
I have rebased the Linux TCP BBRv3 code from net-next at ba2274dcfda859b8a27193e68ad37bfe4da28ddc (
3/15/25
Erfan Sharafzadeh
,
Neal Cardwell
3
2/20/25
BBRv3 and long-term bandwidth estimates (policer detection)
Thanks for all the insights! Do you have performance summaries or packet traces you can share to
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BBRv3 and long-term bandwidth estimates (policer detection)
Thanks for all the insights! Do you have performance summaries or packet traces you can share to
2/20/25
X Y
,
Neal Cardwell
3
1/20/25
BBR usage and traffic share
Thank you very much, it clarifies a lot for our work.
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BBR usage and traffic share
Thank you very much, it clarifies a lot for our work.
1/20/25
Dave Taht
1/16/25
DGP for freebsd
Influenced by BBR ideas... https://freebsdfoundation.org/our-work/journal/browser-based-edition/
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DGP for freebsd
Influenced by BBR ideas... https://freebsdfoundation.org/our-work/journal/browser-based-edition/
1/16/25
Shehab Sarar Ahmed
,
Neal Cardwell
3
1/6/25
BBR sitting idle for a significant amount of time
Hello Neal, Please find the pcap file here: https://drive.google.com/file/d/
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BBR sitting idle for a significant amount of time
Hello Neal, Please find the pcap file here: https://drive.google.com/file/d/
1/6/25
Frederic Lecaille
,
Neal Cardwell
18
12/10/24
bbr new implementation validation
On 12/10/24 21:32, Frederic Lecaille wrote: > So BBRIsProbingBW() should be implemented as follows
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bbr new implementation validation
On 12/10/24 21:32, Frederic Lecaille wrote: > So BBRIsProbingBW() should be implemented as follows
12/10/24
litao
,
Neal Cardwell
5
11/18/24
BBR about BDP calculation
Got it, Thank you neal 在2024年11月18日星期一 UTC+8 22:58:19<Neal Cardwell> 写道: On Monday, November 18
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BBR about BDP calculation
Got it, Thank you neal 在2024年11月18日星期一 UTC+8 22:58:19<Neal Cardwell> 写道: On Monday, November 18
11/18/24
muhamm...@umt.edu.pk
10/30/24
BBR v3 ubuntu VM needed
Hi I was wondering, if anyone can share a “Ubuntu 24+ , (Virtual Machine) VM source” in which BBR v3
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BBR v3 ubuntu VM needed
Hi I was wondering, if anyone can share a “Ubuntu 24+ , (Virtual Machine) VM source” in which BBR v3
10/30/24
Neal Cardwell
10/17/24
draft-ietf-ccwg-bbr: a CCWG WG item
Just a quick update that the BBR draft was adopted as a working group item. The goal is to work
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draft-ietf-ccwg-bbr: a CCWG WG item
Just a quick update that the BBR draft was adopted as a working group item. The goal is to work
10/17/24