[mrtg] Incorrect MRTG plots for Cisco-RTTMON-MIB

Raman Dhanoa dhanoaraman at yahoo.com.au
Thu Dec 18 03:22:51 CET 2008

I have just started using MRTG. My primary requirement is to plot Cisco IP SLA operation results using Cisco-RTTmon-MIB. 
I have been trying to plot Packet Loss value between SD. I have tried different config options. I have compared MRTG results by polling the OID using a MIB browser. 
The CLI output matches the MIB browser (i am using correct OID) but I get different results on the MRTG. Is it due to the way MRTG works or normalises data for plotting. I was under the impression that if a 'gauge' value is polled using MRTG it will simply plot that. 
I have also noticed the current value is always bit off to the actual CLI value

Following is the config for SD packet loss. 
Target[]: . at
Maxbytes[]: 500
Title[]: Packet Loss Source-Destination 
PageTop[]: Packet Loss SD Test 
ShortLegend[]: Pkts
YLegend[]: Packets
Legend1[]: Pkt Loss SD
LegendI[]: SD
Options[]: growright, nopercent,integer, gauge 

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