Re: Tc does not seem to be limiting bandwidth

Linux Advanced Routing and Traffic Control

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On Sun, 2013-02-03 at 21:35 +0000, Andrew Beverley wrote:
> On Fri, 2013-02-01 at 13:20 -0600, Neil Aggarwal wrote:
> > Hello:
> > 
> > I have these commands in my firewall startup script:
> > 
> > DEV=v1252
> > IP=a.b.c.d
> > /sbin/tc qdisc del dev $DEV root
> > /sbin/tc qdisc add dev $DEV root handle 1: htb default 30
> > /sbin/tc class add dev $DEV parent 1: classid 1:1 htb rate 10mbit
> > /sbin/tc class add dev $DEV parent 1: classid 1:2 htb rate 10mbit
> > /sbin/tc filter add dev $DEV protocol ip parent 1:0 prio 1 u32 match ip dst
> > $IP flowid 1:1
> > /sbin/tc filter add dev $DEV protocol ip parent 1:0 prio 1 u32 match ip src
> > $IP flowid 1:2
> 
> You're setting a rate value but not a ceil value.

I should correct this statement that I made. If not specified, a ceil
value defaults to the rate value.

> Rate values can be exceeded, ceil values cannot.

This, of course, is still true.

Andy



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