Re: Ceil Rate

Linux Advanced Routing and Traffic Control

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You didn't set a ceil for 1:10, you only set a rate. when no ceil is specified,  a subclass will borrow past its rate max if it can.

You should use:

tc class add dev eth1 parent 1:1 classid 1:10 htb rate 64kbit ceil 64kbit quantum 1501

And then it would use 64kbit as a hard cap, only going past it for short bursts when trying to maintain 64kbit as the average (cburst paramater can control this, but shouldn't be neccasary).

- Jody

On 9/30/05, anderson@xxxxxxxxxxxx <anderson@xxxxxxxxxxxx > wrote:

tc class add dev eth1 parent 1:1 classid 1:10 htb rate 64kbit quantum 1501 

The problem is I often find the rate exceeding the ceil which is 64kbit for 1:10 when I ran this
command:

                tc -s show class dev eth1

I'm also using a script that captures the output of the above command and
feeds it to rrdtool to plot a graph of the usage and it also shows that the
bandwidth being utilised exceeds 64kbit.

How can ensure that this doesn't happen? Where did I go wrong with my
config?

Any help would be appreciated.


Thanks.
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