Hi,

I have a Dell Powerconnect 6248 that I am trying to get PRTG to monitor. Currently I am working to get it to read the RMON data for "Drop Events"

I created a custom .oidlib file using the Paessler MIB Importer that included ONLY the sub tree for the RMON "Drop Events". I used the Paessler MIB Tester using the custom .oidlib file I created and it returned the values I was looking for.

However, when I create my sensors in PRTG itself, the sensors do not return any values. They all come up as zero and do not show any errors.

I think perhaps PRTG is reading the wrong values from the .oidlib.

Here is an example of the output from the MIB Tester:

Scanning OIDs
from library: "C:\Program Files (x86)\PRTG Network Monitor\snmplibs\DELL_RMON_DROPEVENTS_LIB.oidlib"
on device: 192.168.5.1
1/11/2012 10:37:59 AM Start Scan
1/11/2012 10:37:59 AM RMON-MIB|ether stats: #[1.3.6.1.2.1.16.1.1.1.1]|ether stats drop events 1.3.6.1.2.1.16.1.1.1.3
1/11/2012 10:37:59 AM .1 1418
1/11/2012 10:37:59 AM .2 0
1/11/2012 10:37:59 AM .3 0
1/11/2012 10:37:59 AM .4 0
1/11/2012 10:37:59 AM .5 0
.
.
.
Found OIDs:
1.3.6.1.2.1.16.1.1.1.3.1: RMON-MIB|ether stats: 1|ether stats drop events,Undefined,,(not defined),1
1.3.6.1.2.1.16.1.1.1.3.2: RMON-MIB|ether stats: 2|ether stats drop events,Undefined,,(not defined),1
1.3.6.1.2.1.16.1.1.1.3.3: RMON-MIB|ether stats: 3|ether stats drop events,Undefined,,(not defined),1
1.3.6.1.2.1.16.1.1.1.3.4: RMON-MIB|ether stats: 4|ether stats drop events,Undefined,,(not defined),1
1.3.6.1.2.1.16.1.1.1.3.5: RMON-MIB|ether stats: 5|ether stats drop events,Undefined,,(not defined),1
1.3.6.1.2.1.16.1.1.1.3.6: RMON-MIB|ether stats: 6|ether stats drop events,Undefined,,(not defined),1
.
.
.
Testing OIDs...
Test 1.3.6.1.2.1.16.1.1.1.3.1: value=1418 #
Test 1.3.6.1.2.1.16.1.1.1.3.2: value=0 #
Test 1.3.6.1.2.1.16.1.1.1.3.3: value= #
Test 1.3.6.1.2.1.16.1.1.1.3.4: value= #
Test 1.3.6.1.2.1.16.1.1.1.3.5: value= #
Test 1.3.6.1.2.1.16.1.1.1.3.6: value= #
Test 1.3.6.1.2.1.16.1.1.1.3.7: value=394101 #

So the MIB Tester does return values for the "Drop Events", but PRTG isn't showing these values when I add the sensors to the switch.

Is there something I am doing wrong?

Thank you

Article Comments

Hello,

do the values change on the device if you scan against with the SNMP Tester? If they stay the same, then most likely these counters are defined as Delta-Counters and so the difference on each scan is 0 (as the values don't change).

best regards.


Jan, 2012 - Permalink

Hello,

I checked, and sure enough the counter was defined as a delta.

These numbers do change - but hopefully not all that often.

I modified the custom .oidlib file I created and changed type from Delta to a Gauge and readded my sensors. Now they are showing the correct values!

Thank you


Jan, 2012 - Permalink