Hi Ramos,
In fact CAR allow you to burst. Below is an abstract from the Cisco web
page
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c
/qcpart1/qccar.htm
"In this example, a customer is connected to an Internet service provider
(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 are dropped. The following
commands are configured on the ISP's High-Speed Serial Interface (HSSI)
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"
Cheers,
Bremen
-----Original Message-----
From: Ramos, Armand G. [mailto:RamosAG@etpi.com.ph]
Sent: Friday, January 12, 2001 10:53 AM
To: cisco-nsp@puck.nether.net
Cc: bgreene@cisco.com
Subject: [nsp] Rate Limiting
Importance: High
Good Day to you all,
I would just like to seek your expertise on how I could implement a set-up
for my customers.
I am providing a shared access of 1:4 for my customers for every single pipe
link. Theoretically, our set-up should work like this: if I have a pipe of
64Kbps upstream, with the 1:4 contention ratio, I would be able to service
up to four 64Kbps customers. Basically, they are guaranteed 1/4 (25%) of
their subscribed bandwidth with us and has a possibility of burst to a 100%
on the occassion that the other 3 customers are not using link.
However, as we were implementing it, customers traffic are not symmetric
than we expect. What happened was, one of the 4 sharing customers would
basically eating up the whole pipe with the others having difficulty passing
through. We tried implementing CAR on these customer but all it does is peg
their bandwidth and does not give the ability to burst during non-peak.
Is there a proper set-up or configuration that we could implement to achieve
the desired specs for our service. Hope I hear soon from you guys.
More power!!!
Best regards,
Armand Ramos
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