[mrtg] Re: Conversion : "Cells" to "Bits" ??
KStieers at dainrauscher.com
Thu Oct 7 13:53:46 MEST 1999
> Hi all,
> I've been using MRTG for quite sometime now and it's been running
> flawlessly. I'm currently running on version 2.7.5
> I've recently been monitoring traffic on a ATM switch and the
> traffic that's
> been displayed are represented in b/s.( since I have that
> option turned on )
> But I noticed that it is not displaying the correct
> information, since
> 53kb=1 cell for ATM.
> I have the following questions:
> 1. How do I do a conversion from Cells to Bits in the Program ??
> is there an option available ??
The presumption of MRTG is that you are pointing it at an OID that gives its
data in octets (ie. bytes). NO cell to byte/bit conversion is needed. If
you use the bits option, MRTG takes the number it gets from the snmp poll
and multiplies it by 8.
> 2. Is there another script that does the job for me ??
See number 1.
> 3. If there isn't any, where exactly is the conversion being done
> in the "MRTG" program.....or even in "RATEUP",so that I can make
> the necessary changes ??
Well, to be technical about it, any conversion would happen on the ATM
switch. If it counts cells then it would have to do the math to so that the
ifInOctets and ifOutOctets OIDs gave you octets.
> 3. I noticed that there is a "atmmaker" in the DOC folder that came
> together with MRTG.....should I be using that when monitoring ATMs
ATMMAKER is a cfgmaker-like script for making cfg files to count cells
transfered (you'd have to do the math on this one). CFGMAKER-ATM pulls
stuff from the BayNetworks ATM MIB (or so says the readme).
> I'm not really proficient in PERL, therefore would really
> appreciate if
> anyone could help me out on this.
> Thanks in Advanced !!
> Javier Tan
> Network Support Team
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