From: Scott M. Livingston (scottl@sprinthosting.net)
Date: Fri Mar 28 2003 - 00:05:44 GMT-3
Very well put. Thank you David.
-scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Voss, David
Sent: Thursday, March 27, 2003 6:42 PM
To: 'ccielab@groupstudy.com '
Subject: RE: BC=BE
The problem with that discription, although it's taken from doc cd, is
that
it makes a very simple calculation and confuses the issue for most
people
trying to simply understand what the calculation is (like most
documentation
:) )
This cuts through the mess.
rate-limit x y z
x = bandwidth rate
y = x * 1.5 / 8
z = y * 2
rate-limit output access-group 101 1544000 ?? ?? conform-action transmit
exceed-action drop
x = 1544000
y = 1544000 * 1.5 / 8 = 289500
z = 289500 * 2 = 579000
rate-limit output access-group 101 1544000 289500 579000 conform-action
transmit exceed-action drop
-----Original Message-----
From: Scott M. Livingston
To: Voss, David; 'Franck ccie'; ccielab@groupstudy.com
Sent: 3/27/03 4:52 PM
Subject: RE: BC=BE
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fqos_r/qrfcmd8.htm#1037428
"Policing Traffic with CAR
CAR embodies a rate-limiting feature for policing traffic. When policing
traffic with CAR, Cisco recommends the following values for the normal
and extended burst parameters:
normal burst = configured rate * (1 byte)/(8 bits) * 1.5 seconds
extended burst = 2 * normal burst"
-scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Voss, David
Sent: Thursday, March 27, 2003 3:43 PM
To: 'Franck ccie'; ccielab@groupstudy.com
Subject: RE: BC=BE
I've read multiple times on this study group that it was:
rate-limit x y z
x = bandwidth rate
y = xxxx * 1.5 / 8
z = yyyy * 2
-----Original Message-----
From: Franck ccie [mailto:cciefrank@hotmail.com]
Sent: Thursday, March 27, 2003 1:10 PM
To: ccielab@groupstudy.com
Subject: RE: BC=BE
rate-limit xxxx yyyy zzzzz conform-action transmit exceed-action drop
xxxx = bandwidth rate
yyyy = normal burst
zzzz = exceed burst
usually we take
yyyy = xxxx * 1.5 /8
zzzz = xxxx * 2 /8
I think there is no big issue to take BC=BE, that means we are more
restrictive ..
t
>From: Tim Fletcher >Reply-To: Tim Fletcher >To: OhioHondo , Jeongwoo
Park , ccielab@groupstudy.com >Subject: RE: BC=BE >Date: Wed, 26 Mar
2003
11:15:44 -0500 > >I think you're getting confused with traffic shapping.
> >From:
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr
/fqo
s_c/fqcprt4/qcfpolsh.htm#1000977
>under Extended Burst Value. > >"Setting the extended burst value equal
to the normal burst value >excludes the extended burst capability." >
>-Tim Fletcher > >At 08:07 AM 3/26/2003 -0500, OhioHondo wrote: >>During
the first time interval you're allowing twice as much data >>to be
>>transmitted as normal. >> >>Bc= Normal rate with no congestion >>Be=
Bits transmitted over Bc in the first time period >> >>-----Original
Message----- >>From: nobody@groupstudy.com
[mailto:nobody@groupstudy.com]On Behalf >>Of >>Jeongwoo Park >>Sent:
Wednesday, March 26, 2003 1:14 AM >>To: 'ccielab@groupstudy.com'
>>Subject: BC=BE >> >> >>What does this (BC=BE) imply in CAR? >> >>i.e;
>>rate-limit input 15000000 2812500 2812500 conform-action transmit
>>exceed-action drop >> >>Thanks in adv. >> >>JP
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