Wireshark · Ethereal-users: Re: [Ethereal-users] high percentage of dropped frames in sniffing output

[Ulf Lamping <ulf.lamping@xxxxxx>]

John Que wrote:

> Hello, 
>  I am testing a heavy network server.
>  The machine I am testing on is a strong one - 2 Xeon Processors (3.0 Ghz).
> Now, I am using one Network Card.
> I am trying to sniff from a command line to a file with
>
> tethereal -f "host 10.0.0.1" -w "myOutput.txt"
> I see that
> from 612751
> 71442 packets dropped
>
> this is about 11.6 % packets dropped !
>
> My question is: 
> is there a way to lower (or disable at all) the number of packets dropped? 
> Is there some paramtere of the NIC upon which this parameter is dependent?
>
>  
Well, see http://wiki.ethereal.com/Performance although most tips will 
apply to Ethereal and not Tethereal.

You may try *not* using a capture filter, as this slows down capturing, 
but this will increase output size of course. You can filter out 
unrequired packets later.

Which operating system do you use? Which link speed do you use? ...

Regards, ULFL