<div dir="ltr"><div><div>Netem is capable of much more than emulating just packet delay. It can emulate packet buffers, jitter, packet loss and more. The veritable Swiss Army knife of performance emulation.<br><br><a href="https://www.excentis.com/blog/use-linux-traffic-control-impairment-node-test-environment-part-2">https://www.excentis.com/blog/use-linux-traffic-control-impairment-node-test-environment-part-2</a><br><br></div>Kind regards<br><br></div>Paul Wilkins<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 5 February 2017 at 16:01, Mark Smith <span dir="ltr"><<a href="mailto:markzzzsmith@gmail.com" target="_blank">markzzzsmith@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 5 February 2017 at 13:11, Jason Ross <<a href="mailto:jason@ethisec.com.au">jason@ethisec.com.au</a>> wrote:<br>
> It's interesting how a simple question can create a somewhat educational<br>
> thread.<br>
><br>
> FWIW, I've always worked on 300ms with satellite comms, seems to cover most<br>
> scenarios.<br>
><br>
<br>
</span>If people want to see how "good" using the Internet over satellite is,<br>
the following commands for a Linux router, such as OpenWRT will add<br>
200ms in each direction (pppoe-wan, wlan0 are the WAN and LAN<br>
interface names).<br>
<br>
root at wndr3800:~# tc qdisc del dev pppoe-wan root<br>
root at wndr3800:~# tc qdisc del dev wlan0 root<br>
root at wndr3800:~# tc qdisc add dev pppoe-wan root netem delay 200ms<br>
root at wndr3800:~# tc qdisc add dev wlan0 root netem delay 200ms<br>
<div class="HOEnZb"><div class="h5"><br>
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> Jason<br>
>>>> "Scott Weeks" <<a href="mailto:surfer@mauigateway.com">surfer@mauigateway.com</a>> 3/02/2017 6:04 PM >>><br>
><br>
><br>
><br>
> --- <a href="mailto:mclennan@internode.on.net">mclennan@internode.on.net</a> wrote:<br>
><br>
> Everyone needs to remember the basics when it<br>
> comes to pinging over a geo satellite.<br>
> ------------------------------<wbr>------------------<br>
><br>
><br>
> It's *generally* 250msec up and 250msec down.<br>
> .5 sec round trip for sat only mostly straight<br>
> up-n-down at the radio.<br>
><br>
> <a href="https://en.wikipedia.org/wiki/Geostationary_orbit#Communications" rel="noreferrer" target="_blank">https://en.wikipedia.org/wiki/<wbr>Geostationary_orbit#<wbr>Communications</a><br>
><br>
><br>
> scott<br>
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