From: Michael E. Flannagan (mflannag@xxxxxxxxx)
Date: Fri Feb 02 2001 - 11:19:36 GMT-3
Robert -
Look at it this way. 1st number + 2nd number = where your action begins
to be selectively applied to traffic (in this case, the action is
'drop'). The 3rd number is the point beyond which the exceed-action will
be applied to ALL traffic. If you truly wanted to limit traffic to not
exceed 3.5Mb, then you would want to make sure that rate+Eb = 3.5Mb
ex: rate-limit input access-group 101 3000000 450000 500000 conform-action
transmit exceed-action drop
That would allow up to 3.45Mb of traffic before any action was taken and
would drop *some* traffic between 3.45Mb and 3.5Mb, but would drop all
traffic over 3.5Mb.
Hope that helps,
------------------------------------------------------------
C i s c o S y s t e m s Michael E. Flannagan
| | Network Consulting Engineer
||| ||| Research Triangle Park, NC
||||||| ||||||| (919) 392-4550
.:|||||||||||:.:|||||||||||:. mflannag@cisco.com
------------------------------------------------------------
On Fri, 2 Feb 2001, Robert DeVito wrote:
> If I wanted to limit SMTP to 3.5 MB on my ethernet port I would do the
> following?
>
> rate-limit input access-group 101 3500000 8000 8000 conform-action transmit
> exceed-limit drop
> !
> access-list 101 permit tcp any any eq smtp
>
> My question is, when configuring CAR, it requires me to add the bps
> burst-normal and burst-max. If I came across an scenario when it ask me to
> limit bandwidth to a specific protocol, in this case smtp, to 3.5mbs, if I
> configure it to burst 8k, I am really not limiting it to 3.5mbs. Am I
> thinking correctly? Is there a different way of doing this?
>
> Thank you,
> RobertRobert DeVito
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