RE: Router with bandwidth management

["Mark Tinka" <mtinka at africaonline.co.ug>]

Of course, its no big secret Cisco's CAR is NOT traffic shaping. Cisco [and
other vendors] have their own traffic shaping routines for several types of
services independent of *hard* bandwidth management and limiting, but on the
same box. You just need to know what you want, and choose from a variety of
available solutions.

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
Brian Candler
Sent: Monday, May 19, 2003 1:40 PM
To: John Tully
Cc: Mark Tinka; 'Robert'; afnog at afnog.org
Subject: Re: Router with bandwidth management


On Mon, May 19, 2003 at 01:17:58PM +0300, John Tully wrote:
> For most end users, the standard and basis of most contracts is a 
> serial
> modem that is hard limited (by the physical properties of the link) to a 
> certain max speed.

In that case of course there's no problem, it works just fine: the inbound
traffic goes into a queue in the router, and the queue is emptied at
whatever the physical link speed is.

But when you can buy a 100Mbps lan-extension service cheaper than a 2M line,
there's an incentive to use the high-speed physical layer and then try to
impose a limit on top of it. Same with a shared wireless infrastructure.

> Of course the MikroTik offers bursting and queueing also -- except for 
> on
> simple PPPoE rate limit settings (it is possible to put queuing rate 
> settings also with an extra configuration).

Yep, looks like I need to investigate products from other vendors. I just
want people to know, because it took a long time for me to discover this:
Cisco's CAR is *not* traffic shaping.

Cheers,

Brian.

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