[rrd-users] measure interface ERRORS

José Maria Costa Pereira jose.pereira at corp.vodafone.pt
Mon Oct 21 17:38:50 MEST 2002


Let me try to explain what I would like to do and see if any of you has any

Basically, I want to measure the number of packets with errors (OID
'ifInErros' from the MIB-II interfaces table) in the last 5 minutes.
For instance, imagine that the OID ifInErrors = 0 (the machine as been
rebooted) at 13:00.
At 13:05 the same OID ifInErrors = 19, another five minutes pass and the
value goes to 23, and so on ... when ever there are errors on that interface
the value will rise.

What I wanted to store was:
 13:00  13:05  13:10
   0     19      4

What data source type should I use? ... if I use GAUGE, I'll get
 13:00  13:05  13:10
   0     19      23
... and that's not what I want.

And any of the other data source types (COUNTER, DERIVE and ABSOLUTE) will
give me a measure per second.

Maybe if I put --step 1 (instead of the default 300 seconds) with a COUNTER
like data source, but collect the data in 5 minutes intervals I can "fool"
RRD to divide the measure captured by 1. But still capturing it in five
minutes intervals (using the crontab). Doing preciselly what I want.

Suggestions and/or comments are very welcome...

Best regards,

Jose Maria Costa Pereira
jose.pereira at corp.vodafone.pt

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