From: Mark Stephanus Chandra (mark.chandra@gmail.com)
Date: Mon Jun 02 2008 - 00:19:18 ART
I have the same question with Mr Ahmed Here, How the other end determine if my
traffic is a burst and the other end might potential drop the excess burst
traffic ?
I Mean, when we configure in frame-relay, the frame-relay switch will send DE
(Discard Eligible bit) right ? To mArk the traffic that it's an excess burst
traffic and it might be drop.
And now we are dealing with router to router traffic, what method that the
router will mark the excess so it is eligible to be discarded ?
Mark Stephanus Chandra
IT Consultant
From: ahmed badr [mailto:eng.ahmedbadr@gmail.com]
Sent: 31 Mei 2008 23:40
To: Narbik Kocharians
Cc: Mark Stephanus Chandra; Sadiq Yakasai; Cisco certification
Subject: Re: Shape Peak
So, how will the other end determine if I'm sending with/without the excess
burst? at the end it will receive 256k (either by shape average 256000 or
shape peak 128000) ?
I'm confused!!
2008/5/31 Narbik Kocharians <narbikk@gmail.com>:
CB-Shaping can be done in two different ways: Shape average and Shape Peak.
Shape average limits the transmission rate to CIR, whereas, with Shape peak
the router can send more traffic than CIR.
The formula is:
Peak Rate = CIR (1+Be/Bc) and remember by default Be and the Bc are set to
8k
With Shape Peak you are allowed to burst higher than CIR but remember that the
excess traffic has the potential of being dropped if the network is congested.
Typically used if the network has more bandwidth available and the app that is
being used can handle packet loss.
On Sat, May 31, 2008 at 8:04 AM, ahmed badr <eng.ahmedbadr@gmail.com> wrote:
yes Mark, this is why I ask. unless there is a reason for that, why then
cisco produced the "shape peak" command if I can get the same result with
"shape average" and be=0 !!!
2008/5/31 Mark Stephanus Chandra <mark.chandra@gmail.com>:
> Hi All,
>
> Just reading you guys e-mail and suddenly just come in my mind, so anyway
> what the peak for then ? Is there any different treat between burst traffic
> and commited traffic ? Just like when we configure frame relay, frame relay
> have different treat with burst traffic, burst traffic can might be get DE
> bit right ?
>
> Mark Stephanus Chandra
> IT Consultant
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Sadiq Yakasai
> Sent: 31 Mei 2008 21:22
> To: ahmed badr
> Cc: Cisco certification
> Subject: Re: Shape Peak
>
> Hi Ahmed,
>
> Yes, you get the same data rate in this scenario because Be=0 in the first
> case anyway.
>
> Sadiq
>
>
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