From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Thu Aug 12 2004 - 19:54:04 GMT-3
Carlos,
Technically FRTS send as many bits per second as you would like
irrelevant of AR. Of course the interface will start dropping excess
packets outbound once AR is exceeded and the output buffers are full.
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Carlos G Mendioroz
Sent: Thursday, August 12, 2004 3:33 PM
To: Brian McGahan
Cc: Georg Pauwen; ccielab@groupstudy.com
Subject: Re: IEWB Lab1 - 9.6 - Be calculation
Is it ? If that were the case, you would never run out of excess credit.
Here is my understanding:
Be is a maximum credit (in bits) that you can gain by transmiting below
CIR. If you have credit, you would be able to transmit over CIR (up to
AR) using credits as long as credits remain.
Tc is the lapse where calculations are made. Basically you receive Bc
credits each Tc...
Am I wrong ?
Brian McGahan wrote:
> The burst value, whether committed or excess, is always on a per
> interval basis.
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>>-----Original Message-----
>>From: Carlos G Mendioroz [mailto:tron@huapi.ba.ar]
>>Sent: Thursday, August 12, 2004 5:07 PM
>>To: Brian McGahan
>>Cc: Georg Pauwen; ccielab@groupstudy.com
>>Subject: Re: IEWB Lab1 - 9.6 - Be calculation
>>
>>Brian,
>>the lab asks for allowing busrsting up to AR but it does not say for
>
> how
>
>>much time...
>>So the default of 0 is wrong, but it seems to me that anything over
>>AR-CIR * Tc should be right. The solution guide is not clear about
>
> that...
>
>>Brian McGahan wrote:
>>
>>>By "There is no default Be value" it means the default is zero.
>>>
>>>Brian McGahan, CCIE #8593
>>>bmcgahan@internetworkexpert.com
>>>
>>>Internetwork Expert, Inc.
>>>http://www.InternetworkExpert.com
>>>Toll Free: 877-224-8987 x 705
>>>Outside US: 775-826-4344 x 705
>>>24/7 Support: http://forum.internetworkexpert.com
>>>Live Chat: http://www.internetworkexpert.com/chat/
>>>
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>>>
>>>Of
>>>
>>>
>>>>Georg Pauwen
>>>>Sent: Wednesday, August 11, 2004 7:09 AM
>>>>To: tron@huapi.ba.ar; ccielab@groupstudy.com
>>>>Subject: RE: IEWB Lab1 - 9.6 - Be calculation
>>>>
>>>>Hello Carlos,
>>>>
>>>>AFAIK there is no default for the Be. Check this explanation from
>>>>Internetworkexpert:
>>>>
>>>>The amount of Be credits is derived from unused Bc credits in
>>>
> previous
>
>>>>intervals. There is no limit to how long Be can store unused Bc
>>>
>>>credits.
>>>
>>>
>>>>It
>>>>is a common misconception that Be can only store credits from the
>>>
>>>previous
>>>
>>>
>>>>interval or the previous second.
>>>>There is no default Be value.
>>>>
>>>>Regards,
>>>>
>>>>Georg
>>>>
>>>>
>>>>
>>>>
>>>>>From: Carlos G Mendioroz <tron@huapi.ba.ar>
>>>>>Reply-To: Carlos G Mendioroz <tron@huapi.ba.ar>
>>>>>To: Group Study <ccielab@groupstudy.com>
>>>>>Subject: IEWB Lab1 - 9.6 - Be calculation
>>>>>Date: Wed, 11 Aug 2004 08:43:32 -0300
>>>>>
>>>>>Requirement ask for setting traffic shapping given AR/CIR/minCIR
>>>>
>>>using
>>>
>>>
>>>>BECN
>>>>
>>>>
>>>>>"backof" (adaptive shapping).
>>>>>
>>>>>The sol guide indicates that it is a missconception that Be is to
>>>>
> be
>
>>>>>applied in only one Tc, but then go with a formula for calculating
>>>>
> it
>
>>>>(Be)
>>>>
>>>>
>>>>>that is based in that...
>>>>>
>>>>>Is there a cisco source that would imply that (AR - CIR) * Tc
>>>>
> should
>
>>>be
>>>
>>>
>>>>>used if no other data is available ?
>>>>>
>>>>>--
>>>>>Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
>>>>>
>>>>
>>>_____________________________________________________________________
_
>>
> _
>
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>>>>
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>
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