From: fonesurj (dwinkworth@wi.rr.com)
Date: Tue May 22 2007 - 08:48:01 ART
In reality, you can specify a very large Be (like, two or three seconds
times the access-rate).
The router will then transmit Be+Bc at access-rate until its all gone.
During that two or three seconds, you are still accumulating Bc credit every
Tc interval.
This has been discussed on groupstudy before:
http://www.groupstudy.com/archives/ccielab/200208/msg02568.html
For the exam, I imagine Cisco is looking for you to buy into their
documentation which seems to suggest that Be can never be larger then:
AR/Tc - Bc
Thus only allowing you to burst to line rate for a single Tc.
----- Original Message -----
From: "Ronnie Angello" <ronnie.angello@gmail.com>
To: "Andy" <and123and@googlemail.com>
Cc: "Group Study (E-mail)" <ccielab@groupstudy.com>
Sent: Tuesday, May 22, 2007 8:16 AM
Subject: Re: FRTS and Be - first interval?
> Use default Tc and alow to burst up to AIR.
>
> Be = (AIR - CIR) * Tc
>
> Be = (384000 - 192000) * .125
>
> Be = 24000
>
>
>
>
> On 5/22/07, Andy <and123and@googlemail.com> wrote:
>>
>> http://www.internetworkexpert.com/resources/01700368.htm
>> Slide 31 Example 2
>>
>> The example in above URL shows:
>> Router has AR of 384000
>> CIR of 192000
>> MinCIR 128000
>> Use default Tc and allow to burst up to AR.
>>
>> The configuration shows:
>> frame-relay CIR 192000
>> frame-relay bc 24000
>> frame-relay mincir 128000
>> frame-relay be 24000
>>
>> Why is Be 24000 and not 192000, if the definition of Be is "The number of
>> non-committed bits the router is allowed to send above Bc during the
>> first
>> interval Tc"
>>
>> Confused :-/
>>
>> _______________________________________________________________________
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>>
>
>
>
> --
> Ronald Angello
> CCIE #17846
>
> _______________________________________________________________________
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