From: Dan Shechter (danshtr@yahoo.com)
Date: Tue Jul 13 2004 - 09:18:21 GMT-3
So I wonder if during the lab before august 1, I should use bandwidth as
relative number to max-reserve or as absalute number from the bandwidth
of th einterface?
Assuming the IOS in the lab is 12.2T.
Kenneth Wygand wrote:
>Scott,
>
>While either answer will technically work, "max-reserved-bandwidth 80" is the more correct answer. This merely sets and upper bound on the cumulative percentages of bandwidth you can "guarantee" (more appropriate than "reserve", because other classes can use the bandwidth "guaranteed" for another class when not being used). In older versions of code (12.1T and 12.2), the percentage you guaranteed through "bandwidth-percent", is actually a percent of the "max-reserved-bandwidth" as opposed to a percentage of the full link bandwidth. However, in 12.2T and 12.3, this has been changed to reflect the percentage of the full link bandwidth.
>
>So in versions 12.2T and 12.3, the max-reserved-bandwidth is not used in any calculations, rather it is merely an upper boundary. It's like if you wanted to take $800 out of an ATM machine (banking, not asynchronous transfer mode ;-). Does it matter if the upper limit is $800 or $1000? No, either way you will be able to accomplish what you need. But if the default is $750, it would perhaps appear "more correct" or show a better understanding of the technology if you raised it to $800, or 80% in your case.
>
>There is still one catch. This leaves 20% for the default-class, but this is not guaranteed during times of congestion. If you want to -guarantee- 20% for the default-class, you will need to include a bandwidth-percent command under the default-class and then change the max-reserved-bandwidth to 100, since you are now actually reserving (again, I don't like the terminology) 100% of the bandwidth.
>
>Hope this helps!
>Ken
>
>________________________________
>
>From: nobody@groupstudy.com on behalf of Yasser Aly
>Sent: Tue 7/13/2004 5:07 AM
>To: Scott Savage; ccielab@groupstudy.com
>Subject: RE: Max-reserved-bandwidth question
>
>
>
>Hi Scott,
>
> I didn's said that this is an RSVP question. It is as you said a CBWFQ
>question. Still didn't get an answer on whether to set the
>max-reserved-bandwidth to be 80 or 100.
>
>Regards,
>Yasser
>
>-----Original Message-----
>From: Scott Savage [mailto:rolande23@sbcglobal.net]
>Sent: Tue 7/13/2004 6:10 AM
>To: Yasser Aly; ccielab@groupstudy.com
>Cc:
>Subject: Re: Max-reserved-bandwidth question
>Yasser are you sure this is an RSVP question? Sounds
>like you need to be using CBWFQ and setting classes
>with bandwidth percent statements or using Custom
>Queuing.
>
>--- Yasser Aly <yasser.aly@noorgroup.net> wrote:
>
>
>>Hi Group,
>>
>> The task is asking to do the following
>>
>>Assign 30% for Class A
>>Assign 20% for Class B
>>Assign 30% for Class C
>>
>>The rest of the traffic will use the default-class.
>>
>>As the summation of the reserved bandwidth is over
>>75% so the
>>max-reserved-bandwidth needs to be modified.
>>
>>My question is that would the max-reserved-bandwidth
>>changed to be 80%,
>>or will it be changed to be 100% ?
>>
>>
>
>=====
>--
>Scott Savage
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sun Aug 01 2004 - 10:11:53 GMT-3