Date: Fri, 24 Apr 2020 21:25:18 +0200 From: Michael Tuexen <tuexen@freebsd.org> To: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> Cc: "Herbert J. Skuhra" <herbert@gojira.at>, freebsd-current@freebsd.org Subject: Re: How to enable tcp bbr in FreeBSD??? Message-ID: <26592FE0-4649-47B1-91F4-4369775B90A8@freebsd.org> In-Reply-To: <202004241906.03OJ62ZD086284@gndrsh.dnsmgr.net> References: <202004241906.03OJ62ZD086284@gndrsh.dnsmgr.net>
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> On 24. Apr 2020, at 21:06, Rodney W. Grimes <freebsd-rwg@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@freebsd.org > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"help
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