From: ccie zeng (ccie.candidate@gmail.com)
Date: Sun May 22 2005 - 15:48:54 GMT-3
Hi Andrew:
according to pg,393 in DQOS book, it says all traffic is policed at 96kbps,
Bc of 1 seconds worth of traffic is allowed(12000bytes), Be of 0.5
seconds worth of traffic is allowed(6000bytes), Then when you look at
the configuration at next page, you will see it configure be as 18000,
not 6000.
Did I misunderstood your statement?
Thanks
Zeng
On 5/22/05, Andrew B. Caslow <abcaslow@netmasterclass.net> wrote:
> Simon,
>
> Regarding the CB-police command, the Bc and Be create two separate and
> distinct token buckets. You can have a Be that is equal to or even less than
> the Bc and you will still be able to have an excess burst. This is central
> to the operation of the single-rate three-color-marker. If you have the
> Wendell Odom book, check out pages pp 388-393. He has a couple of examples
> where Be is set to a value less than Bc. Odom also has a nice summary on
> CB-Police parameters on pp. 405-406.
>
> I hope all is well.
>
> -Bruce
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> simon hart
> Sent: Sunday, May 22, 2005 4:40 AM
> To: ccie zeng; Cisco certification
> Subject: RE: Bc and Be
>
> Zeng,
>
> You are right. If you configure both bc and be to the same value there is
> no extended burst. In order to achieve your stated goal, then bc 1000 and
> be 2000 would be correct.
>
> Be careful when using these police commands, I would recommend that you
> always use the ? prompt to determine whether you need to enter bits or
> bytes.
>
> Also the relationship between bc and be is different when using Traffic
> shaping. When traffic shaping any value of be will be the absolute value of
> the burst.
>
> HTH
>
> Simon
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> ccie zeng
> Sent: 22 May 2005 09:30
> To: Cisco certification
> Subject: Bc and Be
>
>
> Hi:
> Could anyone clarify to me, when I asked to configure normal burst
> size 1000 bytes, and excess burst size 1000 bytes for CAR or CB
> policing, should I configure like this ".....bc 1000 be 2000" or just
> "...bc 1000 be 1000".
>
> Based on my understanding if Be is configured as 1000, then there is
> no excess burst, is that right?
>
> Thanks
> Zeng
>
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