rate-limit - CAR

Apr 20, 2006 4 Replies
A

I'm trying to run some experiments with CAR.



First of all I tried to download an iso image from a server of my provider. I've got a constant download rate closest to the maximum bandwidth available. The most important thing was the constance. My line features are DW 640kbits/sec- UP 128kbits/sec



Then I started to apply CAR to all traffic.



The statement i've applied to the WAN inerface (dialer) was



rate-limit input 320000 3000 3000 conform-action transmit exceed-action drop



It means that I suppose that for those interface the average is 320 kbits/sec. The download rate was expected to go down close to 30 Kbytes/sec but the download rate remained fixed to 67 Kbytes/sec.



Where I was wrong? The rate limit seems not to drop anything because the sh int rate-limit says there are no dropped packets.



Help me to understand CAR for the simplest test one can run...



Which values should I put to see the download rate going down?



TIA Alex.


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B

Sounds like the CAR is not actually doing anything. I have used CAR on ethernet sub-interfaces before but not dialers. You may even need to apply it to the physical interface. I would browse the Cisco site to figure out where you should apply it.

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<

Hi Alex. - tray this example

interface FastEthernet1/0 rate-limit input access-group 120 2000000 500000 500000 conform-action continue exceed-action drop rate-limit output access-group 121 2000000 500000 500000 conform-action continue exceed-action drop rate-limit output access-group 122 2000000 500000 500000 conform-action continue exceed-action drop

access-list 120 permit ip host 217.xx.yy.zz any access-list 121 permit ip any host 217.xx.yy.zx access-list 122 permit tcp any any eq smtp

Hope it helps

Manuel

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B

There's nothing wrong with his config line - this only adds unnecessary complexity

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A

I apllied the rate-limit to the ATM0 (the router allowed me to do that) but... nothing :-(

Where am I wrong?

Alex.

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