Most SNMP counters roll over at some point. Clients are ready for that and handle the rollover.
There’s some text about it here: https://www.cisco.com/c/en/us/support/docs/ip/simple-network-management-protocol-snmp/26007-faq-snmpcounter.html and here https://stackoverflow.com/questions/2718283/definition-of-snmp-gauge32-vs-counter32 Definition of SNMP Gauge32 vs Counter32 stackoverflow.com Good to hear that there’s usage of the SNMP module. :-) /O > On 15 Jan 2025, at 09:50, Igor Potjevlesch <igor.potjevle...@gmail.com> wrote: > > Hello Olle, > > Do you mean there is a scale limit? Maybe because the counter is 32bits > counter? > > Regards, > > Igor. > > De : Olle E. Johansson <o...@edvina.net <mailto:o...@edvina.net>> > Envoyé : mardi 14 janvier 2025 12:47 > À : Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org > <mailto:sr-users@lists.kamailio.org>> > Cc : Olle E Johansson <o...@edvina.net <mailto:o...@edvina.net>>; Henning > Westerholt <h...@gilawa.com <mailto:h...@gilawa.com>>; Igor Potjevlesch > <igor.potjevle...@gmail.com <mailto:igor.potjevle...@gmail.com>> > Objet : Re: [SR-Users] Module snmpstats reporting inconsistent call success > metrics on intense peaks of failed calls > > Note that SNMP counters wrap, so it may be expected behaviour. > > /O > > >> On 14 Jan 2025, at 11:51, Igor Potjevlesch via sr-users >> <sr-users@lists.kamailio.org <mailto:sr-users@lists.kamailio.org>> wrote: >> >> Hello Henning, >> >> Undertstood! Thank you. If there is nothing to do, we will move on the >> upgrade. >> >> Regards, >> >> Igor. >> >> De : Henning Westerholt <h...@gilawa.com <mailto:h...@gilawa.com>> >> Envoyé : lundi 13 janvier 2025 17:20 >> À : 'Kamailio (SER) - Users Mailing List' <sr-users@lists.kamailio.org >> <mailto:sr-users@lists.kamailio.org>> >> Cc : Igor Potjevlesch <igor.potjevle...@gmail.com >> <mailto:igor.potjevle...@gmail.com>> >> Objet : RE: [SR-Users] Module snmpstats reporting inconsistent call success >> metrics on intense peaks of failed calls >> >> Hello Igor, >> >> hard to say 100%, because it could be also caused from another module (the >> snmp modules also takes data from other sources I think). >> >> Generally, I would always of course recommended to use a maintained version >> in production. >> >> Cheers, >> >> Henning >> >> From: Igor Potjevlesch <igor.potjevle...@gmail.com >> <mailto:igor.potjevle...@gmail.com>> >> Sent: Montag, 13. Januar 2025 15:12 >> To: Henning Westerholt <h...@gilawa.com <mailto:h...@gilawa.com>>; 'Kamailio >> (SER) - Users Mailing List' <sr-users@lists.kamailio.org >> <mailto:sr-users@lists.kamailio.org>> >> Subject: RE: [SR-Users] Module snmpstats reporting inconsistent call success >> metrics on intense peaks of failed calls >> >> Hello Henning, >> >> Thank you for your check. >> Do you mean that even if we upgrade to the latest branch, we will probably >> face the same issue? >> >> Regards, >> >> Igor. >> >> De : Henning Westerholt <h...@gilawa.com <mailto:h...@gilawa.com>> >> Envoyé : lundi 13 janvier 2025 14:36 >> À : Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org >> <mailto:sr-users@lists.kamailio.org>> >> Cc : Igor Potjevlesch <igor.potjevle...@gmail.com >> <mailto:igor.potjevle...@gmail.com>> >> Objet : RE: [SR-Users] Module snmpstats reporting inconsistent call success >> metrics on intense peaks of failed calls >> >> Hello Igor, >> >> this sounds like a bug to me. The 5.6.x branch is not supported anymore, but >> after I a quick look I did not spotted any recent bugfixes in the modules >> that could match. >> >> Cheers, >> >> Henning >> >> -- >> Henning Westerholt – https://skalatan.de/blog/ >> Kamailio services – https://gilawa.com <https://gilawa.com/> >> >> >> From: Igor Potjevlesch via sr-users <sr-users@lists.kamailio.org >> <mailto:sr-users@lists.kamailio.org>> >> Sent: Montag, 13. Januar 2025 13:40 >> To: sr-users@lists.kamailio.org <mailto:sr-users@lists.kamailio.org> >> Cc: Igor Potjevlesch <igor.potjevle...@gmail.com >> <mailto:igor.potjevle...@gmail.com>> >> Subject: [SR-Users] Module snmpstats reporting inconsistent call success >> metrics on intense peaks of failed calls >> >> Hello! >> >> We are plotting the call success rate on each of our proxies. >> Using the Kamailio snmpstats module, we try to obtain three counters to plot >> them on a graph: >> >> Total Calls >> Active Calls >> Error Calls >> >> Most of the time, everything works well, and we obtain sensible values: >> snmpwalk -c mycommunity -v 2c W.X.Y.Z 1.3.6.1.4.1.34352.3.1.3.1.3.2 -O n >> >> .1.3.6.1.4.1.34352.3.1.3.1.3.2.1.0 = Gauge32: 309 -> Total Calls >> .1.3.6.1.4.1.34352.3.1.3.1.3.2.2.0 = Gauge32: 95 -> Active Calls >> .1.3.6.1.4.1.34352.3.1.3.1.3.2.3.0 = Gauge32: 214 -> Error calls >> >> However, when our proxies are facing intense peaks of failed calls in a >> short time span, sometimes, the "Error Calls" counter returns a value higher >> than "Total Calls". As a result, "Active Calls" suddenly reaches a value >> close to the maximum of a Gauge32 (because T o t a l C a l l s − E r r o r C >> a l l s < 0 ). >> >> snmpwalk -c mycommunity -v 2c W.X.Y.Z 1.3.6.1.4.1.34352.3.1.3.1.3.2 -O n >> >> .1.3.6.1.4.1.34352.3.1.3.1.3.2.1.0 = Gauge32: 153 -> Total Calls >> .1.3.6.1.4.1.34352.3.1.3.1.3.2.2.0 = Gauge32: 4294967226 -> Active Calls >> .1.3.6.1.4.1.34352.3.1.3.1.3.2.3.0 = Gauge32: 223 -> Error calls >> >> As a result, our graphs make no more sense. >> >> We are currently running kamailio 5.6.4. >> >> Any idea if it's a bug or a configuration issue? >> >> Regards, >> >> Igor. >> >> <image001.jpg> >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >> >> Sans virus.www.avast.com >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >> >> __________________________________________________________ >> Kamailio - Users Mailing List - Non Commercial Discussions -- >> sr-users@lists.kamailio.org <mailto:sr-users@lists.kamailio.org> >> To unsubscribe send an email to sr-users-le...@lists.kamailio.org >> <mailto:sr-users-le...@lists.kamailio.org> >> Important: keep the mailing list in the recipients, do not reply only to the >> sender!
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