[mrtg] non-updating log?

[Calvert, Neil]

Hi folks

another one for you.

I recently enabled a standard MRTG traffic graph on an ethernet port. MRTG
is reporting Bitsin :0 and Bitsout :23, as almost constant values. However
when I checked the mib objects ifInOctets and ifOutOctets I computed an
average value of 180-190 bits/s on this port (bits out). I did the
calculation as follows :

(Counter value now) - (Counter value 5 min ago)
----------------------------------------------     * 8 = bits/s value
			300


When I set up a ping trace, the graph sparked into life, and appeared to be
showing correct values. Once the ping was killed, the graph sank back to 0 /
23.

Since I doublechecked on the mibs, I'm not sure why MRTG is under-reporting
the traffic. Any ideas? The relevant config is below.

mrtg 2.8.11.

----
Interval: 10
# Add a WorkDir: /some/path line to this file
WorkDir: /apps/mrtg-2.8.8/mrtgoutput/snh_devices/snh_ethernet/area_41
IconDir: /apps/mrtg-2.8.8/images
#
WithPeak[_]: dwmy
#--------------------------------------------------------------------------
Target[a41d1p1t]: 1:public at 1.1.1.1
MaxBytes[a41d1p1t]: 10000000
Options[a41d1p1t]: transparent growright
Title[a41d1p1t]:  DEC Router Ethernet Traffic
PageTop[a41d1p1t]: <H1>Traffic Analysis for RouteAbout Access Router
Ethernet Port 1
 </H1>       
<TABLE>
   <TR><TD>System:</TD><TD> DEC RouteAbout Access Router </TD></TR>
   <TR><TD>Maintainer:</TD><TD> Me </TD></TR>
   <TR><TD>Interface:</TD><TD>EnetPort 1</TD></TR>
   <TR><TD>IP:</TD><TD>DEC Router (1.1.1.1)</TD></TR>
   <TR><TD>Max Speed:</TD>
       <TD>10 Mbits/s (ethernetCsmacd)</TD></TR>
   <TR><TD>Device Location : </TD><TD> hell </TD></TR>
   <TR><TD>Contact Details : </TD><TD> me (555-2121) </TD></TR>
  </TABLE>
YLegend[a41d1p1t]: Bits
ShortLegend[a41d1p1t]: Bits/s
Legend1[a41d1p1t]: Incoming Traffic in Bits per Second
Legend2[a41d1p1t]: Outgoing Traffic in Bits per Second
Legend3[a41d1p1t]: Maximal Incoming Traffic in poll cycle
Legend4[a41d1p1t]: Maximal Outgoing Traffic in poll cycle
LegendI[a41d1p1t]: &nbsp;Load In:
LegendO[a41d1p1t]: &nbsp;Load Out:                               


cheers,

Neil
                          

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