Re: How to enable tcp bbr in FreeBSD???

From: Neel Chauhan <neel_at_neelc.org>
Date: Fri, 24 Apr 2020 14:41:35 -0700
Not OP, but would BBR work with VNET, or is that a WIP?

I'm sorry if none of you are familiar with VNET.

-Neel

===

https://www.neelc.org/
BTW: Not neel_at_ the committer

On 2020-04-24 12:25, Michael Tuexen wrote:
>> On 24. Apr 2020, at 21:06, Rodney W. Grimes 
>> <freebsd-rwg_at_gndrsh.dnsmgr.net> wrote:
>> 
>>> On Fri, Apr 24, 2020 at 01:31:35PM +0200, Kurt Jaeger wrote:
>>>> 
>>>> Thanks. Is BBR active automatically or is there a sysctl or
>>>> socket option to activate it ?
>>> 
>>> net.inet.tcp.cc.available: List available congestion control 
>>> algorithms
>>> net.inet.tcp.cc.algorithm: Default congestion control algorithm
>> 
>> Start at:
>> man mod_cc
> BBR is conceptually a CC, but in FreeBSD it is NOT implemented as a CC 
> module.
> It is a TCP stack. You need to load it using
> kldload tcp_bbr
> and then either make it the default by
> sudo sysctl net.inet.tcp.functions_default=bbr
> or use the IPPROTO_TCP level socket option TCP_FUNCTION_BLK to set the 
> stack
> to BBR. The uperf test tool allows to set the TCP stack for 
> measurements.
> Please note that you need to compile the kernel with
> makeoptions	WITH_EXTRA_TCP_STACKS=1
> options		TCPHPTS
> 
> Best regards
> Michael
>> 
>> 
>> --
>> Rod Grimes                                                 
>> rgrimes_at_freebsd.org
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Received on Fri Apr 24 2020 - 19:41:46 UTC

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