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

From: ykla <yklaxds_at_gmail.com>
Date: Fri, 24 Apr 2020 21:51:49 +0800
WITH_EXTRA_TCP_STACKS=1  in make.conf  ? And why not make it in kernel
default?

在 2020年4月24日星期五,Johan Hendriks <joh.hendriks_at_gmail.com> 写道:

>
> Op 24-04-2020 om 15:37 schreef Kurt Jaeger:
>
>> Hi!
>>
>> You can enable the stack globally on new connections without
>>> restarting the box or daemons by running these commands:
>>>
>>> kldload tcp_bbr
>>>
>>> sysctl net.inet.tcp.functions_inherit_listen_socket_stack=0
>>> sysctl net.inet.tcp.functions_default=bbr
>>>
>> This fails on the box running 13.0:
>>
>> # kldload tcp_bbr
>> kldload: can't load tcp_bbr: No such file or directory
>>
>> So it looks it has to be hooked to the build somehow ?
>>
>> And: man -k bbr has no results as well...
>>
>> The commit message says the following:
>
>
> This commit adds BBR (Bottleneck Bandwidth and RTT) congestion control.
> This
> is a completely separate TCP stack (tcp_bbr.ko) that will be built only if
> you add the make options WITH_EXTRA_TCP_STACKS=1 and also include the
> option
> TCPHPTS. You can also include the RATELIMIT option if you have a NIC
> interface that
> supports hardware pacing, BBR understands how to use such a feature.
>
>
> So i think you need te rebuild with the following option set
> WITH_EXTRA_TCP_STACKS=1
>
> regards
> Johan Hendriks
>
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Received on Fri Apr 24 2020 - 11:51:51 UTC

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