[smokeping-users] Satellite link - Packet Loss error

[Chris Wilson]

Hi Adrian,

On Wed, 10 Oct 2007, Adrian Minta wrote:

> fping -aef myhostlist.txt works but repeated pings to one host fail if the 
> rtr > 580ms.
>  
> fping -C 5 -q 10.10.10.33
> 10.10.10.33 : 552.39 563.67 548.83 560.51 -
> 
> So for fping the Packet Loss is 1/5 = 20%   
> I am using  fping (2.4b2-to-ipv6-14) debian default.

We see this as well. The way smokeping uses fping by default, it does not 
wait long enough for the last ping to come in. We have to hack smokeping 
by hand to do it. I edit lib/Smokeping/probes/FPing.pm and change the @cmd 
lines as follows:

    my @cmd = (
                    $self->binary,
                    '-C', $self->pings, '-q','-B1','-r1','-t10000',
                    @params,
                    @{$self->addresses});

I think -t10000 is the important one. It sets the timeout to 10 seconds 
(default is 500ms).

Cheers, Chris.
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