[mrtg] Error Rate formula

[budif wid]

Hi,
 
I'm having problem on getting my formula right for input error rate.
Basically I use this formula (from cisco website):
 
[ ^ ifInError /( ^ ifInUcastPkts + ^ IfInNUcastPkts + ^ ifInError+ ^ ifInUnknownProtos)] * 100.
 
^ = Delta value
 
Questions:
1. How can I write MRTG formula for those parameters ?. 
 
2. Are there any specific options that I need to enable for the MRTG ?
 
3. Is my formula below correct ? 
 
Thanks...
 
Target[b]: 1.3.6.1.2.1.2.2.1.14.42&1.3.6.1.2.1.2.2.1.14.42:public at 192.9.201.133  / ( 1.3.6.1.2.1.2.2.1.12.42&1.3.6.1.2.1.2.2.1.12.42:public at 192.9.201.133 + 1.3.6.1.2.1.2.2.1.11.42&1.3.6.1.2.1.2.2.1.11.42:public at 192.9.201.133 + 1.3.6.1.2.1.2.2.1.14.42&1.3.6.1.2.1.2.2.1.14.42:public at 192.9.201.133 + 1.3.6.1.2.1.2.2.1.15.42&1.3.6.1.2.1.2.2.1.15.42:public at 192.9.201.133 ) *  100
SetEnv[b]: MRTG_INT_IP="" MRTG_INT_DESCR=""
MaxBytes[b]: 100
Title[b]: Testing
PageTop[b]: <H1>Traffic Analysis for 41 -- cat5k</H1>
 <TABLE>
   <TR><TD>System:</TD>     <TD></TD></TR>
   <TR><TD>Maintainer:</TD> <TD></TD></TR>
   <TR><TD>Description:</TD><TD>  </TD></TR>
   <TR><TD>ifType:</TD>     <TD>ethernetCsmacd (6)</TD></TR>
   <TR><TD>ifName:</TD>     <TD>3/11</TD></TR>
   <TR><TD>Max Speed:</TD>  <TD>1250.0 kBytes/s</TD></TR>
 </TABLE>
ThreshMaxI[b]: 5
ThreshProgI[b]: c:\mrtgdata\threshold\sendmail.pl
ThreshProgOKI[b]: c:\mrtgdata\threshold\sendmailok.pl
Options[b]: growright
 
 


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