RE: Router with bandwidth management

[Brian Longwe <brian at pch.net>]

Right, with Cisco you can do two type of bandwidth management - rate
limiting (CAR) and traffic shaping.

The main difference between the two (if my memory serves me well) is that
rate lmiting sets "hard" boundaries to your policies (when limits are
hit, packets are dropped, while traffic shaping  gives you more leeway to define "soft" boundaries.

Longwe

On Sat, 17 May 2003, Mark Tinka wrote:

> Well, if you choose to go with Cisco, they support some form of bandwidth
> management called rate-limiting.
>
> With rate-limiting, you can asign minimum, maximum and burst bandwidth to a
> specific IP address and/or network range. Here's a sample configuration:
>
> conf t
>  access-list 100 remark 32Kbps to Wireless Client XXX
>  access-list 100 permit ip host 192.168.0.200 any
>  access-list 100 permit ip any host 192.168.0.200
>
>  int e0/0
>   rate-limit input access-group 100 32000 8000 16000 conform-action transmit
> exceed-action drop
>   rate-limit output access-group 100 32000 8000 16000 conform-action
> transmit exceed-action drop
>
> As you can see above, the access list that matches your wireless client's IP
> address is placed onto the Ethernet interface that is connected to your
> wireless segment. In the rate-limit statement on the Ethernet interface,
> 32000 is the bits per second allowed, 8000 is the normal burst bytes and
> 16000 is the maximum burst bytes. As the last few lines say, if the user's
> IP address conforms to this setting, transmit his packets through. If the
> assigned capacity is exceeded, begin to apply congestion control -
> basically, drop packets exceeding allocated capacity.
>
> Rate-limiting is supported on only the 2600 series chassis and above. From
> experience, it doesn't work on the 1600 nor the 1700 series Cisco routers.
>
> Regards,
>
> Mark Tinka - CCNA
> Network Engineer
> Africa Online Uganda
> 5th Floor, Commercial Plaza
> 7 Kampala Rd,
> Tel:   +256-41-258143
> Fax:   +256-41-258144
> E-mail: mtinka at africaonline.co.ug
> Web:     www.africaonline.co.ug
>
>
> -----Original Message-----
> From: owner-afnog at afnog.org [mailto:owner-afnog at afnog.org] On Behalf Of
> Robert
> Sent: Friday, May 16, 2003 9:50 PM
> To: afnog at afnog.org
> Subject: Router with bandwidth management
>
>
> Who can propose to me an entry level router with bandwidth mangement for my
> small wireless isp network?
>
> Regards
>
> Robert Longla
>
>
>


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