From: Yasmin&Alonso Martinez (Al-Min@worldnet.att.net)
Date: Mon Jul 07 2003 - 22:55:59 GMT-3
Hi All,
Cisco documentation has an example on how to configure Constrained Access
Rate that doesn't make sense to me and I was wondering if any of you could
help me understand it. Here it is
"In this example, a T1 line may be used for 100 milliseconds (ms) in a
burst, but the long-term average is limited to 64 kbps. This configuration
example restricts the amount of load the system can induce on the outbound
network interface.
interface serial 4/1:0
traffic-shape rate 64000 6400 6400
If you need to restrict the amount of load the system can induce outbound,
and therefore the total load the system can impose on the Internet service
provider (ISP), configure traffic shaping on the outbound interfaces"
(http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_configurati
on_guide_chapter09186a00800c60cc.html#35156):
Why are the burst-size and the excess burst-size configured as 6400? My
understanding is this:
If the router transmitted at T1 speed for 100 msec it would be sending
1548000 bits; but setting the burst-size to 6400 does not allow this. This
configuration only allows the transmission of 6400 bits on each 100-msec
interval and bursts of 128000 bits. Am I wrong?
THANKS!
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