From: "Jason Hunter" <jthunter@samuelgestault.com>
To: lartc@vger.kernel.org
Subject: RE: [LARTC] tc causes errors on HTML downloads
Date: Fri, 24 May 2002 13:07:18 +0000 [thread overview]
Message-ID: <marc-lartc-102224571128426@msgid-missing> (raw)
In-Reply-To: <marc-lartc-102219063224043@msgid-missing>
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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next prev parent reply other threads:[~2002-05-24 13:07 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 [this message]
2002-05-24 13:10 ` Martin Devera
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