From: yu chunyan (yuchunyan@hotmail.com)
Date: Sun Oct 26 2003 - 21:52:50 GMT-3
good questions. for Q1 1, bc will be used up before borrow from be(but for
command police in CBWFQ, it works defferent way,check the command
reference). for Q2, if bc is set up too small, debt happens(I think so). any
comments?
bin.
>From: "Yasser Aly" <blackyeyes00@hotmail.com>
>Reply-To: "Yasser Aly" <blackyeyes00@hotmail.com>
>To: ccielab@groupstudy.com
>Subject: RE: Frame-Relay Traffic Shaping "Be" Value
>Date: Fri, 24 Oct 2003 15:04:10 -0400
>
>Dear All,
>
> Can someone elaborate and provide answer for the questions below ?
>I searched for answers in the archives and couldn't find any.
>
>Regards,
>Yasser
>
>>From: "Daniel Cisco Group Study" <danielcgs@imc.net.au>
>>Reply-To: "Daniel Cisco Group Study" <danielcgs@imc.net.au>
>>To: "Brian Dennis" <brian@labforge.com>, <ccielab@groupstudy.com>
>>Subject: RE: Frame-Relay Traffic Shaping "Be" Value
>>Date: Fri, 25 Apr 2003 15:14:05 +1000
>>
>>Thanks Brian.
>>
>>Makes a lot of sense.
>>
>>A couple of questions:
>>
>>(1) Say an 800 bit packet is ready to be transmitted and the bc bucket
>>contains only 400 credits bits, and the be bucket contains say 2000 bits.
>>Would it be correct to say that 400 bits would come out of the bc bucket,
>>emptying that bucket, and 400 would come out of the be bucket, leaving
>>only 1600 bits? Your explanation implied that all the bits would come from
>>the be bucket in this scenario. Which is correct? Maybe it wouldn't
>>matter....
>>
>>(2) What happens when the bc value is set to a very small value, such that
>>when a packet requests credits for transmission, it is requesting more
>>than exists in the bc (and be) buckets? For example:
>>
>>map-class frame-relay SingleBucket
>> frame-relay cir 16000
>> frame-relay bc 2000
>>
>>Here, bc is only 250 bytes, and be=0. A 1500 byte packet cannot be
>>serviced, as there will never be enough bc credits. Does some sort of debt
>>scheme kick in? Do we then borrow credits from one or more future Tc's, to
>>service the request?
>>
>>Daniel
>>
>
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