Re: snmpd - snmpget and snmpwalk inconsistent

snmpwalk always returns the correct value

On Sun, Apr 23, 2017 at 11:11 PM, Ulrich Windl <
[email protected]> wrote:

> >>> Ryan Goodfellow <[email protected]> schrieb am 21.04.2017 um 20:43 in
> Nachricht
> <CABnJGMiHzm3G8BNs3X_7BefRFpHKcKdQ7fktxX5RUyuW7VeFBw@mail.gmail.com>:
> > Hi,
> >
> > I have observed a puzzling inconsistency between the get and walk
> requests
> > from snmpd. I am running the daemon on a Cumulus Linux switch. The
> > following shell sessions shows the issue.
> >
> > ### SERVER (stem) ###
> >
> > ry@stem$ snmpd --version
> > NET-SNMP version:  5.7.3
> >
> > ry@stem$ service snmpd restart
> >
> > ry@stem$ pgrep -lfa snmpd
> > 1298 /usr/sbin/snmpd -y -LF d /var/log/snmp -DALL -u snmp -g snmp -I
> -smux
> > -p /run/snmpd.pid -f
> >
> >
> > ### CLIENT ###
> >
> > ## initial request for ifNumber using GET returns 0 (wrong)
> > ry$ date && snmpget -c public -v2c stem .1.3.6.1.2.1.2.1.0
> > Fri Apr 21 18:20:15 UTC 2017
> > iso.3.6.1.2.1.2.1.0 = INTEGER: 0
> >
> > ## initial request for ifNumber using WALK returns 11 (correct)
> > ry$ date && snmpwalk -c public -v2c stem .1.3.6.1.2.1.2.1.0
> > Fri Apr 21 18:20:20 UTC 2017
> > iso.3.6.1.2.1.2.1.0 = INTEGER: 11
>
> What happens if you start with snmpwalk? It looks like if the first query
> after some pause returns the incorrect value, independent of the method.
>
> >
> > ## subsequent requests for ifNumber using GET returns 11 (correct)
> > ry$ date && snmpget -c public -v2c stem .1.3.6.1.2.1.2.1.0
> > Fri Apr 21 18:20:24 UTC 2017
> > iso.3.6.1.2.1.2.1.0 = INTEGER: 11
> >
> > ## after some time passes GET is back to being incorrect
> > ry$ date && snmpget -c public -v2c stem .1.3.6.1.2.1.2.1.0
> > Fri Apr 21 18:21:58 UTC 2017
> > iso.3.6.1.2.1.2.1.0 = INTEGER: 0
> >
> > In doing some tests, I have determined that the value goes back to 0
> > exactly 1 minute after the walk was executed.
> >
> >
> >
> > --
> > *ry**@isi*
>
>
>
>
>


-- 
*ry**@isi*

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