Capping bandwidth on 827

- S
- Stephen Worthington
  
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posted
18 years ago

Tue, Jul 5, 2005 2:27 PM

My ADSL connection to my ISP is currently being traffic shaped by the provider of the ADSL connection (different from my ISP). My ISP can not get them to stop doing this, and it is having a serious impact on my available bandwidth. What seems to be happening is that when I max out my 32 kibyte/s download bandwidth for more than a few seconds, the traffic shaping cuts in and drops the available bandwidth to only 5 kibytes/s! If I stop all traffic for 2-3 seconds, the traffic shaping stops and the normal 32 kibytes/s is available again.

To prevent this from happening, what I want to do is to get my Cisco

827 ADSL router which is running this connection to provide a hard cap on my download speed so that it never exceeds (say) 31 kibytes/s and never triggers the traffic shaping. My ADSL connection runs on PPPoA. I am running IOS 12.3(13a). Is there a way to do this?

- I
- Ivan Ostres
  
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posted
18 years ago

Tue, Jul 5, 2005 7:42 PM

Well, doing this might be very hard or even impossible. Best way would be to make your ISP to shape traffic for you since if you are shaping traffic at your router, that traffic already went over your ADSL link.

One thing you could try (if most of your traffic if TCP) is using WRED...

- L
- larstr
  
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posted
18 years ago

Thu, Jul 7, 2005 8:44 AM

Stephen Worthington wrote: : My ADSL connection to my ISP is currently being traffic shaped by the : provider of the ADSL connection (different from my ISP). My ISP can : not get them to stop doing this, and it is having a serious impact on : my available bandwidth. What seems to be happening is that when I max : out my 32 kibyte/s download bandwidth for more than a few seconds, the : traffic shaping cuts in and drops the available bandwidth to only 5 : kibytes/s! If I stop all traffic for 2-3 seconds, the traffic shaping : stops and the normal 32 kibytes/s is available again.

Is this happening on certain types of trafic? If so it could be that they are using PacketShaper. It's typically used to limit p2p trafic.

Otherwise you could probably setup something on your pc(s) that would limit this. On windows Netlimiter would be such a program, on linux you can setup bandwidth throttling using netfilter.

Lars