From: Gery Pang (pang_gery@yahoo.com.hk)
Date: Tue Feb 25 2003 - 06:44:33 GMT-3
Hi,
Please help to clarify the burst value.
In the config
policy-map map1 10
class class1
priority 9600 480
Quote from the CD:
"The burst argument is used to specify the burst size and, therefore, configure the network to accommodate temporary bursts of traffic. The default burst value, which is computed as 200 milliseconds of traffic at the configured bandwidth rate, is used when the burst argument is not specified. "
I assume the policy map will divid 1 second into 5 slots. 480 bytes will be the max. traffic allowed in a slot and the max. traffic is 9600 bps, no matter what the burst is.
Could I use the same logic in CAR?
For example:
rate-limit input 8000000 16000 24000 conform-action set-mpls-exp-transmit 5 exceed-action drop
If I use the same logic, 16000*8*5 = 640000 bits, which is less than 8Mbps.
So, how is burst-normal related to the bps value?
The document suggest burst-normal is calculated by bps*1.5/8, I just want to know the logic behind.
Thank you very much.
Best regards.
Gery Pang
pang_gery@yahoo.com.hk
2003-02-25
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