From: Popgeorgiev Nikolay (nikolay.popgeorgiev@siemens.com)
Date: Tue Jun 20 2006 - 10:29:55 ART
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124tcr/tqos_r/qos_q1ht.htm#wp1080850
Look at this, example 3 :
Any remaining traffic is limited to 8 Mbps, with a normal burst size of 16000 bytes and an excess burst size of 24000 bytes. Traffic that conforms is transmitted with an MPLS experimental field value of 5. Traffic that does not conform is dropped. See the following command in the example:
rate-limit input 8000000 16000 24000 conform-action set-mpls-exp-transmit 5
exceed-action drop
So when you are given the normal burst size of 150kbps and an Max Burst size of 300kbps you should just convert them into bytes and type them
Solution 2 is correct according to me.
If the normal burst size and an Max Burst size are not given shten you should calculate them based on this formulas:
normal burst = configured rate * (1 byte)/(8 bits) * 1.5 seconds
extended burst = 2 * normal burst
Hope this I right
Best,
Nick
-----Original Message-----
From: Koen Zeilstra [mailto:koen@koenzeilstra.com]
Sent: Tuesday, June 20, 2006 2:47 PM
To: Maximus
Cc: Cisco certification
Subject: Re: Doubt in CAR : Rate limit
if the b is lowercaps its bits so you should divide by 8. That give's you
the burst size per timing interval. Not per second. So you have to convert
the bps to a byte per timing interval value. I believe the timing
interface for CAR is 1,5. So that makes 300000/8*1,5=56250.
-> solution 3.
Don't forget the "exceed-action drop".
HTH
Koen
-----------------------
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On Tue, 20 Jun 2006, Maximus wrote:
| ok i am only confused on converting the normal and max burst
|
| i will give the three kind of answers which i got from pals... can somebody
| tell me which one to go forward with..
|
| Qn again : the requiremenet is "traffic is limited to 8 Mbps, with a normal
| burst size of 150kbps and an Max Burst size of 300kbps. traffic that
| conforms is sent
| with an IP precedence of 5. Traffic that does not conform is dropped. "
|
| Sol 1 :rate-limit output 8000000 150000 300000 conform-action
| set-prec-transmit 5
|
| Sol 2 :rate-limit output 8000000 18750 37500 conform-action
| set-prec-transmit 5
|
| 150000/8 = 18750
| 300000/8 = 37500
|
| Sol 3 :rate-limit output 8000000 28125 56250 conform-action
| set-prec-transmit 5
|
| (150000/8)*1.5 = 28125
| (300000/8)*1.5 = 56250
|
|
| On 6/20/06, Vishal Patel <vpatel@accessproviders.com.au> wrote:
|
| > In CAR command , the first figure i.e. 8 Mb in your case is in Bits per
| seconds.
|
| Then the second figure is Normal burst which is number of Bytes.
|
| Then the third value is the Maximum Burst which is number of Bytes.
|
|
|
|
| -----Original Message-----
| From: nobody@groupstudy.com [mailto: nobody@groupstudy.com] On Behalf Of
| Maximus
| Sent: Tuesday, 20 June 2006 11:21 AM
| To: Cisco certification
| Subject: Fwd: Doubt in CAR : Rate limit
|
| sorry made a small typo... this is the exact config i have done
|
| hie all just a lil confusion
|
| the requiremenet is "traffic is limited to 8 Mbps, with a normal burst size
| of 150kbps and an Max Burst size of 300kbps. traffic that conforms is sent
| with an IP precedence of 5. Traffic that does not conform is dropped. "
|
|
| rate-limit output 8000000 150000 300000 conform-action set-prec-transmit 5
|
| is my config rite ? the confision is in normal n max is it in bytes or
| bits...somebody please lead me out...
|
|
| regards,
|
| Max
|
|
|
| --
| regards,
|
| Max
|
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