From: Wade Edwards (wade.edwards@xxxxxxxxxxxxxxxxxxx)
Date: Fri Feb 02 2001 - 12:40:42 GMT-3
OK I am now confused. How are you getting 6.6 Mbps from the command below.
rate-limit input access-group 101 3000000 450000 500000 conform-action
transmit exceed-action drop
It should be 3 Mbps with a normal burst of .45 Mbps and a max burst at .5
Mbps. Is the formula first number + second number is normal traffic and
first number + second number + first number + third number is the max burst
rate? I don't understand what is meant by burst then. I thought normal
burst was what you are given above the first number and still be within your
budget and max burst is what will be dropped.
I am so confused about CAR now.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Michael E. Flannagan
Sent: Friday, February 02, 2001 8:55 AM
To: David Goldsmith
Cc: Robert DeVito; ccielab@groupstudy.com
Subject: Re: CAR question
Dave is exactly right...I love zeros - just got carried away :-)
Sorry for the confusion.
------------------------------------------------------------
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, David Goldsmith wrote:
> Group,
>
> Actually, that is incorrect. This would allow 3mega bits for the first
number
> and 3.6 mega bits for the burst.
>
> the second number is in bytes. This statement will allow 6.6 M bits
through.
>
> Thanks,
> Dave
>
>
> "Michael E. Flannagan" wrote:
>
> > 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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