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From: Raghuveer <raghuveer-rc@naturesoft.net>
To: lartc@vger.kernel.org
Subject: [LARTC] CBQ_bandwidth
Date: Wed, 20 Aug 2003 10:50:51 +0000	[thread overview]
Message-ID: <marc-lartc-106137665106328@msgid-missing> (raw)


Hi Stef,

Reffering to page < http://www.docum.org/stef.coene/qos/faq/cache/7.html 
 > I found a para as follows,

" CBQ is not always as accurate as it should be. See docum.org on the 
test page for some tests with bounded classes. The algorithm used by cbq 
is very "link sensitive". It calculates the link idle time and for that 
it needs the real link bandwidth, average packet size and some other 
parameters. But there calculations are not always accurate. So it's 
possible that you will get inaccurate results if you use CBQ to limit 
the traffic in a class.  "

Here Iam slightly confused with real link bandwidth, Can I understand 
that while creating CBQ we need interface bandwidth (ethtool, mii-diag) 
and and while assigning the classes real link bandwidth is required. An 
example will definately help me. Can you pls suggest a way to find real 
link bandwidth....? As ethtool and mii-diag will only get the interface 
bandwidth.

Regards
-Raghu

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             reply	other threads:[~2003-08-20 10:50 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-20 10:50 Raghuveer [this message]
2003-08-20 12:22 ` [LARTC] CBQ_bandwidth Stef Coene
2003-08-20 12:57 ` Raghuveer
2003-08-20 15:09 ` Stef Coene
2003-08-21  4:57 ` Raghuveer
2003-08-21 18:20 ` Stef Coene
2003-08-22  5:29 ` Raghuveer
2003-08-22  8:36 ` Stef Coene
2003-08-22  9:22 ` Raghuveer
2003-08-22 11:39 ` Stef Coene

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