From: Narbik Kocharians (narbikk@gmail.com)
Date: Sat Sep 20 2008 - 19:40:56 ART
Darby,
I am proud of you.
On Sat, Sep 20, 2008 at 1:12 PM, Darby Weaver <ccie.weaver@gmail.com> wrote:
> Correct.
>
> I did not mean to imply that this would influence MRTG, since it only uses
> 5
> minute intervals. I was referring to the bits versus the bytes and how it
> appears on graphs created by some of the programs like MRTG (out of the
> context). Not meaning to imply it has any effect on MRTG graphs, sorry for
> the mixup.
>
> Usage Guidelines
>
> If you want load computations to be more reactive to short bursts of
> traffic, rather than averaged over 5-minute periods, you can shorten the
> length of time over which load averages are computed.
>
> If the load interval is set to 30 seconds, new data is used for load
> calculations over a 30-second period. This data is used to compute load
> statistics, including input rate in bits and packets per second, output
> rate
> in bits and packets per second, load, and reliability.
>
> Load data is gathered every 5 seconds. This data is used for a weighted
> average calculation in which more-recent load data has more weight in the
> computation than older load data. If the load interval is set to 30
> seconds,
> the average is computed for the last 30 seconds of load data.
>
> The *load-interval* command allows you to change the default interval of 5
> minutes to a shorter or longer period of time. If you change it to a
> shorter
> period of time, the input and output statistics that are displayed when you
> use the* **show interface* command will be more current, and based on more
> instantaneous data, rather than reflecting a more average load over a
> longer
> period of time.
>
> This command is often used for dial backup purposes, to increase or
> decrease
> the likelihood of a backup interface being implemented, but it can be used
> on any interface.
> Examples
>
> In the following example, the default 5-minute average is set it to a
> 30-second average. A burst in traffic that would not trigger a dial backup
> for an interface configured with the default 5-minute interval might
> trigger
> a dial backup for this interface that is set for a shorter, 30-second
> interval.
>
> interface serial 0
>
> load-interval 30
>
>
>
>
>
> On Sat, Sep 20, 2008 at 3:31 PM, Shawn Zandi <szmetal@gmail.com> wrote:
>
> > Load-interval?!
> > Load data is gathered every 5 seconds, and u can't change it as u can see
> > in output of show interface (it changes every 5 seconds),
> > "Load-interval 30" makes router to calculate average rate based on "each
> 30
> > seconds" instead of 5 minutes, its not related to data gathered by snmp,
> if
> > u use MRTG it calculates (by Default) your bandwidth consumption based on
> > Bytes instead of bits for each 5 minutes.
> >
> > Shawn Zandi,
> > Routing, Switching & Security Consultant
> > CCIE (Routing & Switching) - MCSE
> >
> >
> >
> > On Sat, Sep 20, 2008 at 10:49 PM, Darby Weaver <ccie.weaver@gmail.com
> >wrote:
> >
> >> And then we still have to take those Kbits and divide them by 8 to get
> the
> >> bytes. Seems most non-engineer types have a hard time reading graphs
> from
> >> outlike MRTG/PRTG and wonder why their input/output is not quite what
> they
> >> expected.
> >>
> >> I suppose the truth is if everyone really understood how little traffic
> in
> >> terms of megabytes actually crossed the network in many under
> One-Billion
> >> dollar companies, then many of these companies accounting department
> might
> >> ask themselves what they are really paying for.
> >>
> >> In the meantime, bits look like impressively large numbers to the
> layman.
> >>
> >> I agree with victor on using the load-interval command to help get a
> more
> >> granular view on the bps crossing the interface.
> >>
> >>
> >>
> >>
> >> On Sat, Sep 20, 2008 at 4:45 AM, Victor Cappuccio <vcappuccio@gmail.com
> >> >wrote:
> >>
> >> > That would be great to do as well, but I think that you can just tune
> is
> >> > the
> >> > time of the load interval
> >> >
> >> > Router(config)#int s0/0
> >> > Router(config-if)#load-interval ?
> >> > <30-600> Load interval delay in seconds
> >> >
> >> > I always try to change those values in real production network,
> because
> >> you
> >> > can now in 30 sec how much bps is crossing over that interface in
> >> > particular
> >> > but anyways, The notation you see at the show policy-map or the
> output
> >> > rate
> >> > from the show interface is based on my opinion in the SI prefixes for
> >> > decimal multiples http://members.optus.net/alexey/prefSI.xhtml, now
> you
> >> > can
> >> > just in your mind divide by 1000 and you get the kbits/sec you are
> >> asking
> >> > for.
> >> >
> >> > My 2 Cents
> >> > Victor.-
> >> >
> >> >
> >> > On Fri, Sep 19, 2008 at 5:42 PM, vignesh sethuraman <
> >> > sethuvignesh@yahoo.co.in> wrote:
> >> >
> >> > > Hello Experts,
> >> > >
> >> > > I have a question regarding the 5 minute input/output rate.
> >> > >
> >> > > In the output of show interface <int number>, we will be seeing 5
> >> minute
> >> > > input rate/output rate in bits/sec. Is it possible to make the
> device
> >> > show
> >> > > it
> >> > > in kbits/sec.
> >> > >
> >> > > Thanks,
> >> > > Vignesh
> >> > >
> >> > >
> >> > >
> >> > > Connect with friends all over the world. Get Yahoo! India
> >> Messenger
> >> > > at http://in.messenger.yahoo.com/?wm=n/
> >> > >
> >> > >
> >> > > Blogs and organic groups at http://www.ccie.net
> >> > >
> >> > >
> >> _______________________________________________________________________
> >> > > Subscription information may be found at:
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> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> >
> >> >
> >> > --
> >> > Victor Cappuccio
> >> > CCIE R/S# 20657
> >> > CCSI# 30452
> >> > www.anetworkerblog.com
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> _______________________________________________________________________
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> >>
> >>
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> >>
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>
>
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>
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>
>
>
>
>
>
>
-- Narbik Kocharians CCSI#30832, CCIE# 12410 (R&S, SP, Security) www.MicronicsTraining www.Net-Workbooks.com Sr. Technical InstructorBlogs and organic groups at http://www.ccie.net
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