[AusNOG] NBN Satellite Latency

[Paul Wilkins]

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.

https://www.excentis.com/blog/use-linux-traffic-control-impairment-node-test-environment-part-2

Kind regards

Paul Wilkins

On 5 February 2017 at 16:01, Mark Smith <markzzzsmith at gmail.com> wrote:

> On 5 February 2017 at 13:11, Jason Ross <jason at ethisec.com.au> wrote:
> > It's interesting how a simple question can create a somewhat educational
> > thread.
> >
> > FWIW, I've always worked on 300ms with satellite comms, seems to cover
> most
> > scenarios.
> >
>
> If people want to see how "good" using the Internet over satellite is,
> the following commands for a Linux router, such as OpenWRT will add
> 200ms in each direction (pppoe-wan, wlan0 are the WAN and LAN
> interface names).
>
> root at wndr3800:~# tc qdisc del dev pppoe-wan root
> root at wndr3800:~# tc qdisc del dev wlan0 root
> root at wndr3800:~# tc qdisc add dev pppoe-wan root netem delay 200ms
> root at wndr3800:~# tc qdisc add dev wlan0 root netem delay 200ms
>
>
>
> > Jason
> >>>> "Scott Weeks" <surfer at mauigateway.com> 3/02/2017 6:04 PM >>>
> >
> >
> >
> > --- mclennan at internode.on.net wrote:
> >
> > Everyone needs to remember the basics when it
> > comes to pinging over a geo satellite.
> > ------------------------------------------------
> >
> >
> > It's *generally* 250msec up and 250msec down.
> > .5 sec round trip for sat only mostly straight
> > up-n-down at the radio.
> >
> > https://en.wikipedia.org/wiki/Geostationary_orbit#Communications
> >
> >
> > scott
> >
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