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>
Sent: Montag, 13. Januar 2025 13:40
To: sr-users@lists.kamailio.org
Cc: Igor Potjevlesch <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.

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