Re: [Devmon] T or even P bits speed output in 'home made'-cisco-n7000 switch template

[Peter W. <pet...@gm...>]

Last night I ran a batch job query for the specific device counters. There
were no flapping counters whatsoever! It is still running. This is a vm, a
RHEL server, newer xymon version, newer devmon version, different Perl
version.

I also deployed the if_load-test on my current Xymon server. Yes, hardware,
SLES, and different in many ways. But the test shows valid counters.

So the puzzle is which of these nasty different thing (hw vs vm, OS, Perl,
Xymon, devmon, ...) is the culprit.

I hope to have this fixed a.s.a.p.

Peter






2016-12-20 12:20 GMT+01:00 Peter Welter <pet...@gm...>:

> Hi Wim,
>
> Thanks for your quick response.
>
> I cannot acknowledge wether there are network issues. So sorry, but
> several times (+/- 8 times a day) we experience the issue.
>
> I see multiple devices with the query:
> [root@uhu-o cisco-n7000]# snmpwalk -v2c -c SECRET xxx.xxx.xxx.xxx
> .1.3.6.1.2.1.31.1.1.1.1
> IF-MIB::ifName.83886080 = STRING: mgmt0
> IF-MIB::ifName.335544320 = STRING: loopback0
> IF-MIB::ifName.385875968 = STRING: Null0
> IF-MIB::ifName.437256192 = STRING: Ethernet3/1
> IF-MIB::ifName.437260288 = STRING: Ethernet3/2
> IF-MIB::ifName.437264384 = STRING: Ethernet3/3
> IF-MIB::ifName.437268480 = STRING: Ethernet3/4
> IF-MIB::ifName.437272576 = STRING: Ethernet3/5
> IF-MIB::ifName.437276672 = STRING: Ethernet3/6
> IF-MIB::ifName.437280768 = STRING: Ethernet3/7
> IF-MIB::ifName.437284864 = STRING: Ethernet3/8
> IF-MIB::ifName.437780480 = STRING: Ethernet4/1
> IF-MIB::ifName.437784576 = STRING: Ethernet4/2
> IF-MIB::ifName.437788672 = STRING: Ethernet4/3
> IF-MIB::ifName.437792768 = STRING: Ethernet4/4
> IF-MIB::ifName.437796864 = STRING: Ethernet4/5
> IF-MIB::ifName.437800960 = STRING: Ethernet4/6
> IF-MIB::ifName.437805056 = STRING: Ethernet4/7
> IF-MIB::ifName.437809152 = STRING: Ethernet4/8
> IF-MIB::ifName.637534209 = STRING: Ethernet3/1
> IF-MIB::ifName.637534210 = STRING: Ethernet3/2
> IF-MIB::ifName.637534211 = STRING: Ethernet3/3
> IF-MIB::ifName.637534212 = STRING: Ethernet4/1
> IF-MIB::ifName.637534213 = STRING: Ethernet4/2
> IF-MIB::ifName.637534214 = STRING: Ethernet4/3
> IF-MIB::ifName.637534215 = STRING: Ethernet4/4
> IF-MIB::ifName.637534216 = STRING: Ethernet4/5
> IF-MIB::ifName.637534217 = STRING: Ethernet4/6
> IF-MIB::ifName.637534218 = STRING: Ethernet3/4
> IF-MIB::ifName.637534219 = STRING: Ethernet3/5
>
> 2016-12-20 9:32 GMT+01:00 W.J.M. Nelis <Wim...@nl...>:
>
>> Hello Peter,
>>
>> > I currently want to monitor our cisco n7000 switch using devmon.
>> >
>> > I took the current cisco-n6000 template, since it is using the 10GB
>> > Highspeed ports and our 7000 switch is using many of these 10Gbps
>> ports. It
>> > is also based on this article with suggestions from Joshua Krause:
>> > https://sourceforge.net/p/devmon/mailman/message/19631280/
>> >
>> > The good part: It does gather all kind of data. ;-)
>> >
>> > The bad part: It shows over time many spikes whereas the scale is
>> boosted
>> > to T of even P-bit, making the output less useful.
>> Are the occurrences of these spikes related to certain events?
>> A spike can be caused by a reset of the SNMP-counters. If the DS type is
>> COUNTER, a huge spike is generated, as the reset to zero is interpreted as
>> a counter wrap. In case of a 64-bit counter, the result will be in the
>> range you describe.
>>
>> (Note: Devmon does not know if a counter is 32-bit or 64-bit. If the value
>> decreases from one sample to the next, and if the value of the oldest of
>> the two samples is less than 2^32, it assumes that it is a 32-bit counter.
>> Thus the height of the spike will be much less for a rarely used
>> interface.)
>>
>>
>> > Perhaps this has to do with the template that was copied, but perhaps
>> it is
>> > just just the flapping from the maximum number of positions.
>> > (32bits/64-bits). But then again, I read 64-bits counters.
>> >
>> > I try to add ifInErrors, to remove redundant interfaces that were
>> > previously shown. Lending this from the if_err-test the number of
>> interface
>> > shown reduced to the same amount that is shown with if_err and
>> if_dsc-test.
>> > But underneath the output for all devices is shown to devmon and perhaps
>> > that makes it want to update for example Ethernet4_6 twice?!
>> Do you see the interfaces multiple times in an snmpwalk of ifName (OID
>> .1.3.6.1.2.1.31.1.1.1.1)?
>>
>> Regards,
>>    Wim Nelis.
>>
>>
>>
>>
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>
>