may be tcpdump is not able to receive all the packets.
When you interrupt tcpdump, it will show you if the kernel has dropped any
packets.
Thanks
Sridhar
"Rick Goh" <[EMAIL PROTECTED]>@lrc.epfl.ch on 03/22/2001 02:55:02 PM
Sent by: [EMAIL PROTECTED]
To: "Rick Goh" <[EMAIL PROTECTED]>, "lartc" <[EMAIL PROTECTED]>
cc: <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
Subject: Re: [LARTC] Tcpdump capturing faulty???
New results:
I realised that if i reduce the number of flows to 3 instead of 5, tcpdump
will show graphs which will corresponds to that of TTT.
Anyone has any idea why??
I doubt it is the snaplen.
----- Original Message -----
From: "Rick Goh" <[EMAIL PROTECTED]>
To: "lartc" <[EMAIL PROTECTED]>
Sent: Friday, March 23, 2001 5:07 AM
Subject: [LARTC] Tcpdump capturing faulty???
> Hello,
> I am testing traffic control on linux. I used Tele-traffic tapper
> (http://www.csl.sony.co.jp/person/kjc/programs.html) to see real-time
> throughput of my client and it shows that traffic control of different
type
> of traffic flow works! However when i used tcpdump, it shows that
priority
> doesn't work, meaning all flows have the same bandwidth => tc doesn't
work.
>
> In detail:
>
> Experiment 1: With borrow, FAILED. With all streams bounded, works.
> When i set on 192.168.1.10:
> port 42011 --> 5 (Mbps)
> port 42012 --> 10
> port 42013 --> 15
> port 42014 --> 20
> port 42015 --> 50
>
> Experiment 2:
> When i set on 192.168.1.10:
> port 42011 --> Priority 1
> port 42012 --> Priority 2
> port 42013 --> Priority 3
> port 42014 --> Priority 4
> port 42015 --> Priority 5
>
>
> On Tele traffic tapper (TTT), works fine but not tcpdump. What do i mean
by
> tcpdump cannot work:
> 1. After i tcpdump it, TTT can actually read from the dump file. But it
> shows Traffic control doesn't work; i.e. Meaning all 5 streams share the
> same bandwidth.
>
> 2. I tcpdump into a file and post analysis it by breaking it into the
> traffic from each different port. And i graph it. DOesn't work!! Meaning
all
> 5 streams share the same bandwidth.
>
> Has anyone come across this major hiccup???
>
>
> Regards.
>
>
>
>
>
> _______________________________________________
> LARTC mailing list / [EMAIL PROTECTED]
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