[rrd-developers] Re: Counter limitation

[Austin Oh]

Thank you.

Where i can get the 64bit counter ?
In our site, all router is Cisco's 7500 series.

Alex van den Bogaerdt wrote:
> 
> > I have adopted a RRD tool with mrtg.
> > But, i notice that i can't see actual utilization
> > when the utilization of link is over about 120Mbps.
> >
> > We use the Cisco router with high bandwidth link,
> > 155Mbps ATM, FastEtherChannel, etc.
> >
> > In my opinion, the problems are our router which uses
> > the 32bit counter.
> > Therefore, i have modified some code of mrtg and
> > decreases the interval to 1 minute.
> > It' looks fine. However, this is not the solutions because of
> > 32bit counter.
> >
> Actually it can be.  RRDtool does not suffer from counter wraps (as opposed
> to MRTG) provided the counter only wraps once.  This means that in your
> case the maximum increase can be 2^32-1 octets per minute and therefore
> the maximum rate can be 572,662,306 bps ( (2^32-1)*8/60 )
> 
> If you write your own front end, it may be wise to use 64-bit counters
> whenever possible.
> 
> Regards,
> --
>    __________________________________________________________________
>  / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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> | My employer is capable of speaking therefore I speak only for myself |
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