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

[Peter W. <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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