[j-nsp] MRTG and ATM interfaces

[Brian W. Gemberling]

Are you using 64-bit counters for this interface?

On Fri, 21 May 2004, Kevin Vuong wrote:

> Hi all,
>
> I am pointing MRTG at my first Juniper (M10i running 6.1R2.2) and I was
> wondering if anyone else has had any issues with it.  I am running into a
> problem where my ATM interfaces start to flatline for a few hours then come
> back with normal graph data.  The deltas in the mrtg .log files seem to be
> terribly inflated causing it to be ignored by MRTG's MaxBytes.
>
> i.e.
>
> Gigabit Interface (this one's working fine)
>
> 1085150833      30091877001     14239736165
> 1085150535      29967336655     14184379972
> ---------------------------------------------
> 298 secs        124540346 in    55356193 out
>
> b/s:            417920.624161074        185759.036912752
> B/s:            52240.0780201342        23219.879614094
>
> MRTG .log file entry : 1085150833 417921 185759 417921 185759
>
> So the numbers match up there.
>
>
> ATM interface (not working)
>
> 1085151734      814289676       4093188060
> 1085151434      813643725       4089949443
> ---------------------------------------------
> 300 secs        645951 in       3238617 out
>
> b/s:            2153.17 		10795.39
> B/s:            269.14625       1349.42375
>
>
> The MaxBytes is 1496.0 bits/s for this ADSL circuit.  Since this measurement
> exceeds the MaxBytes, MRTG ignores it and takes the previous value instead.
> Here is a mrtg .log for one of the ATM subinterfaces that is flatlining.
>
> 1085151734 814289676 4093188060
> 1085151734 92 155 92 155
> 1085151434 92 155 92 155
> 1085151300 92 155 92 155
> 1085151000 92 155 92 155
> 1085150700 92 155 92 155
> 1085150400 92 155 92 155
> 1085150100 92 155 92 155
> 1085149800 92 155 92 155
> 1085149500 92 155 92 155
> 1085149200 92 155 92 155
> 1085148900 92 155 92 155
> 1085148600 92 155 92 155
> 1085148300 92 155 92 155
> 1085148000 92 155 92 155
> 1085147700 92 155 92 155
> 1085147400 92 155 92 155
> 1085147100 92 155 92 155
> 1085146800 92 155 92 155
> 1085146500 92 155 92 155
> 1085146200 92 155 92 155
> 1085145900 92 155 92 155
> 1085145600 92 155 92 155
> 1085145300 92 155 92 155
> 1085145000 124 127 165 155
>
> InOctets: 1.3.6.1.2.1.2.2.1.10
> OutOctets: 1.3.6.1.2.1.2.2.1.16
>
> Thanks,
>
> Kevin
>
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