From: Martin Devera <devik@cdi.cz>
To: lartc@vger.kernel.org
Subject: RE: [LARTC] tc causes errors on HTML downloads
Date: Fri, 24 May 2002 13:10:26 +0000 [thread overview]
Message-ID: <marc-lartc-102224590028603@msgid-missing> (raw)
In-Reply-To: <marc-lartc-102219063224043@msgid-missing>
Use IMQ. I will allow you it.
On Fri, 24 May 2002, Jason Hunter wrote:
> Devik -
>
> Actually, I didn't realize that the shaping only shapes on egress. That is interesting. I assume this can be somewhat overcome by applying queues to both interfaces, however, this doesn't provide exactly the same simulation. That is to say, if I am trying to simulate a bounded connection of 1200bps shared between the upload and the download (e.g. a modem) then there isn't a direct way to do this, unless you can filter traffic in both directions into the same queue?
>
>
> > tc class add dev eth0 parent 1:0 classid 1:$k cbq bandwidth \
> > 100Mbit rate 1200bps weight 1 prio 8 allot 1514 cell 8 maxburst 100 avpkt \
> > 1000 bounded
>
> As for the errors, I think that I have tracked them down to the maxburst value of 100 in my second level cbq queues. I adjusted this value to between 3 and 5, and got much better results.
>
> - Jason
>
> -----Original Message-----
> From: Martin Devera [mailto:devik@cdi.cz]
> Sent: Friday, May 24, 2002 4:27 AM
> To: Jason Hunter
> Cc: lartc@mailman.ds9a.nl
> Subject: Re: [LARTC] tc causes errors on HTML downloads
>
> Probably you will have to do closer look (tcpdump
> and tcptrace).
> >From my experiance I'd not believe CBQ much but without
> closer expertise it is hard to say what's goin' on.
> Also you tried to add IP adresses as both SRC and DST
> which is nonsense to do on single interface. It seems
> like if you don't understand that shaping shapes egress
> traffic only.
> devik
>
>
>
>
>
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prev parent reply other threads:[~2002-05-24 13:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-23 21:49 [LARTC] tc causes errors on HTML downloads Jason Hunter
2002-05-24 8:26 ` Martin Devera
2002-05-24 13:07 ` Jason Hunter
2002-05-24 13:10 ` Martin Devera [this message]
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