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From: "Udayan Borkar" <udayan@altigy.com>
To: lartc@vger.kernel.org
Subject: [LARTC] Question on Linux Traffic Management
Date: Fri, 15 Mar 2002 20:34:57 +0000	[thread overview]
Message-ID: <marc-lartc-101622459726372@msgid-missing> (raw)

Hi,

I have been playing with the Linux advanced traffic management and
have a few questions. I have been working with a Pentium based PC with
two ethernet ports. Traffic received on the first port is sent to the second
port, on which CBQ is configured. I am using the Redhat 7.2 distribution
with Kernel 2.4.7

1. If I create a bounded, isolated class (1:1) below the root qdisc (1:0)
and set its rate (i.e. for class 1:1) to 50Mbits/sec, the actual traffic
rate observed is significantly different from the configured value. Measurements
were made over an interval of 15 sec to 1 minute. The bandwidth parameter
of the root qdisc was set to 100Mbit/sec. Why is this happening and has
anyone else encountered this behaviour?

2. The Linux Advanced Routing & Traffic Control HOWTO says that one cannot
shape a flow above 1Mbit/sec accurately because the scheduling tick is 10
millisec. Is there a way to get around this to accurately shape higher rate
flows?

3. Is anyone working on any other hierarchical queuing disciplines beyond
CBQ and HTB? If so where can I find out more about this?

Thanks,

- Udayan




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                 reply	other threads:[~2002-03-15 20:34 UTC|newest]

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