Remote interface graph draw wrong values if snmp cicle have a high value

mwcotton

563 posts since
Apr 23, 2008

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1. Aug 7, 2010 1:59 PM (in response to Andrea Consadori)

Re: Remote interface graph draw wrong values

I would check the zenperfsnmp.log and make sure this device is not occasionally timing out.

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Andrea Consadori

863 posts since
Feb 11, 2008

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2. Aug 9, 2010 12:59 AM (in response to mwcotton)

Re: Remote interface graph draw wrong values

1- i can confirm that is not a remote connection issue because on the same customer this is the interface switch port graph where the server is connected

2- every remote device under /server i've give me interface graph issue (both linux nas and windows server)

3- only switch that use ethernetCsmacd_64 report correct graph

i try ethernetCsmacd_64 oid on server but they doesn't work with this mib... (so i cannot use this template on serve interface)

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Andrea Consadori

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3. Aug 11, 2010 8:41 AM (in response to mwcotton)

Re: Remote interface graph draw wrong values

look here, changing SNMP Performance Cycle Interval (secs) from default to 60 on collector the problem disappear

and datapoint rate grow up

do you know why?

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Andrea Consadori

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4. Aug 12, 2010 3:04 AM (in response to Andrea Consadori)

Re: Remote interface graph draw wrong values

and look what happen if i set snmp perf cicle to 30 sec

until 11.00 is with snmp perf cicle with default value

between 11.00 and 18.00 is with 60 sec

after 18.00 (of mer) is with snmp circle to 30 sec...

and the same on performance collector

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Andrea Consadori

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5. Aug 30, 2010 4:08 AM (in response to Andrea Consadori)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

noone have a reply to this issue?or if someone can confirm me that's an issue i open a ticket (but maybe there's another explaination)

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trojahn

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Aug 24, 2010

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6. Aug 30, 2010 1:57 PM (in response to Andrea Consadori)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

Hey Andrea,

I had the same issue... Since I wanted a little more detail on my graphs anyway, I just lowered the SNMP cycle to 60secs...

I also compared the RRD creation from Cacti for my interfaces on the same device and noticed that Cacti uses COUNTER and sets the MAX value for the datasource... Zenoss was not setting MAX and was using DERIVE... I don't know if it's related but in Zenoss my graphs were getting weird when the traffic was above 100Mbits... It was like they were losing a zero... They were going back to 10Mbits every time they were above 100... COUNTER and MAX fixed that...

I also changed the "Default RRD create command" to the :

RRA:AVERAGE:0.5:1:500

RRA:AVERAGE:0.5:1:600

RRA:AVERAGE:0.5:6:700

RRA:AVERAGE:0.5:24:775

RRA:AVERAGE:0.5:288:797

RRA:MAX:0.5:1:500

RRA:MAX:0.5:1:600

RRA:MAX:0.5:6:700

RRA:MAX:0.5:24:775

RRA:MAX:0.5:288:797

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Andrea Consadori

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7. Sep 21, 2010 12:48 PM (in response to trojahn)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

Hi, my issue is that i've 400 monitored device and if i lower snmp cicle to 60 i fix window server snmp polling but after some days zenperfsnmp daemon start to give a lot of traceback error and stop working.. if i set 120 second i've gaps in graphs but zenperfsnmp doesn't crash...

anyone can help?

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Andrea Consadori

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Feb 11, 2008

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8. Sep 21, 2010 12:50 PM (in response to Andrea Consadori)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

note: this issue is only on remove (over vpn) windows server.. local windows server give no performance reporting issue...

maybe a zenoss-windows guru can help us to understand better what's going..

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slackowski

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Sep 15, 2010

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9. Sep 23, 2010 1:56 AM (in response to Andrea Consadori)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

I am monitoring my my cisco switches that are on the same lan as the zenoss server. I have zenoss running in a virtual machine and i can see the graph issues.

see : thread/14490?tstart=0

How can i adjust SNMP polling times ? im not too familiar with it.

Thank you

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Andrea Consadori

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10. Sep 28, 2010 2:36 AM (in response to slackowski)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

how many device do you have under monitor?

be aware of this change, can brake all other perf graph (reverting value fix the issue if happen)

Advanced - Collectors - localhost (your collector) - edit - and change "SNMP Performance Cycle Interval (secs)"

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Andrea Consadori

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11. Jun 4, 2011 2:19 AM (in response to trojahn)

Re: Remote interface graph draw wrong values if snmp cicle have a high value

here i found an usefoul post that explain why setting snmp cycle to 60sec fix the issue

message/9685#9685

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Aug 12, 2010 3:05 AM

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