From: Wade Edwards (wade.edwards@xxxxxxxxxxxxxxxxxxx)
Date: Thu Aug 16 2001 - 13:05:22 GMT-3
The 24000 as the second and third numbers in the rate-limit commands say
the interface can burst to up to 24000 bytes before they will be
dropped.
I think the Tc is 1s for CAR. I don't think you can change this value.
You need to remember 24000 is in bytes which translates to 192000 bits.
So in the example you will get 20192000 bit per second input and output
before the traffic is dropped.
L8r.
-----Original Message-----
From: Dan [mailto:dp595@optonline.net]
Sent: Thursday, August 16, 2001 10:20 AM
To: ccielab@groupstudy.com
Subject: CAR example
I found the following example on
http://www.cisco.com/univercd/cc/td/doc/product/software/ios111/cc111/ca
r.ht
m
Can someone please explain how they get 24000 as the burst size ? Also,
does CAR assume that Tc is 125ms ?
I'm staring at the documentation but I can't figure it out.
Thanks.
-DP
Input and Output Rate-Limiting on an Interface Example
In this example, a customer is connected to an ISP by a T3 link. The ISP
wants to rate-limit the customer's transmissions to 20 Mbps of the 45
Mbps.
In addition, the customer is allowed to transmit bursts of 24000 bytes.
All
exceeding packets dropped. The following commands are configured on the
ISP's HSSI interface connected to the customer:
interface Hssi0/0/0
description 45Mbps to R1
rate-limit input 20000000 24000 24000 conform-action transmit
exceed-action drop
ip address 200.200.14.250 255.255.255.252
rate-limit output 20000000 24000 24000 conform-action transmit
exceed-action drop
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