[LARTC] rate vs peakrate - TBF.

[LARTC] rate vs peakrate - TBF.

[Suraj Shankar]

Hi,
  Can you please explain to me the difference between
rate and peakrate, in conjucture to TBF.
IMHO,
rate : controls the no. of pkts flowing through the
pipe, and
peakrate : controls the no. of tokens flowing through
the bucket. A funtion(?) of peakrate and mtu is rate.
  If this is true, why do I need to specify both
peakrate and rate?

Regards,
suraj.

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Re: [LARTC] rate vs peakrate - TBF.

[Stef Coene]

On Friday 14 November 2003 09:59, Suraj Shankar wrote:
> Hi,
>   Can you please explain to me the difference between
> rate and peakrate, in conjucture to TBF.
> IMHO,
> rate : controls the no. of pkts flowing through the
> pipe, and
> peakrate : controls the no. of tokens flowing through
> the bucket. A funtion(?) of peakrate and mtu is rate.
>   If this is true, why do I need to specify both
> peakrate and rate?
The bucket is a buffer of packets.  So if you have bucket full with tokens, 
you can send some packets very fast.  The rate determines the speed that new 
tokens are put in the bucket.  Without a peakrate, you can use the tokens in 
the bucket to send packets at wire speed.  To prevent this, you can specify a 
peakrate so you can limit the speed that tokens in the bucket can be used.

Stef

-- 
stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.openprojects.net

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