Date: Fri, 24 Jul 2020 16:59:27 -0700 From: Patrick Mahan <plmahan@gmail.com> To: Lars Liedtke <liedtke@punkt.de> Cc: User Questions <freebsd-questions@freebsd.org> Subject: Re: Slowing network speed Message-ID: <CAFDHx1%2BAO%2Br8ssLimX3MTtuC0Yn%2BD6MfKXK3M2aVLtsdHQquWg@mail.gmail.com> In-Reply-To: <e3f8682a-96e0-2ea6-6d9a-4a81b52a310d@punkt.de> References: <20200724123844.GA24036@doctor.nl2k.ab.ca> <e3f8682a-96e0-2ea6-6d9a-4a81b52a310d@punkt.de>
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ping is not a good indicate of network speed since most ping packets are small. Network performance depends on many issue. Most notably the total amount of data being transmitted, what TCP congestion algorithm is in effect, how much kernel buffer space, etc. You can increase the size of the ping packet using the '-s' option, or use the ping sweep options (-G <maxsize> -g <minsize>) etc. See ping(8). Interface packet status can be retrieved using 'netstat -I <interface>' Other stats can be pulled using 'netstat -4 -x' (for IPv4 packet buffer using, delayed acks, retransmissions, etc). See netstat(8). Traceroute is only semi-useful as it relies on ICMP error response which are throttled by many routers. iperf requires that you have a remote port you can talk to to send and receive traffic. Good luck, Patrick On Fri, Jul 24, 2020 at 6:52 AM Lars Liedtke <liedtke@punkt.de> wrote: > Hello, > > The first things coming to my mind > > are ping, traceroute and iperf > > Lars > > Am 24.07.20 um 14:38 schrieb The Doctor via freebsd-questions: > > Just wondering how you test a device for seemingly slow network speed. > > -- > --- > punkt.de GmbH > Lars Liedtke > .infrastructure > > Kaiserallee 13a > 76133 Karlsruhe > > Tel. +49 721 9109 500 > https://infrastructure.punkt.de > info@punkt.de > > AG Mannheim 108285 > Gesch=C3=A4ftsf=C3=BChrer: J=C3=BCrgen Egeling, Daniel Lienert, Fabian St= ein > > >
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