Module snmpstats reporting inconsistent call success metrics on intense peaks of failed calls
13 Jan
2025
13 Jan
'25
11:40 p.m.
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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14 Jan
14 Jan
12:35 a.m.
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(a)lists.kamailio.org>
Sent: Montag, 13. Januar 2025 13:40
To: sr-users(a)lists.kamailio.org
Cc: Igor Potjevlesch <igor.potjevlesch(a)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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virus.www.avast.com<https://www.avast.com/sig-email?utm_medium=email&…
1:12 a.m.
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 <hw(a)gilawa.com>
Envoyé : lundi 13 janvier 2025 14:36
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <igor.potjevlesch(a)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/> https://skalatan.de/blog/
Kamailio services – <https://gilawa.com/> https://gilawa.com
From: Igor Potjevlesch via sr-users <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org> >
Sent: Montag, 13. Januar 2025 13:40
To: sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org>
Cc: Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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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3:20 a.m.
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.potjevlesch(a)gmail.com>
Sent: Montag, 13. Januar 2025 15:12
To: Henning Westerholt <hw(a)gilawa.com>om>; 'Kamailio (SER) - Users Mailing
List' <sr-users(a)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 <hw(a)gilawa.com>
Envoyé : lundi 13 janvier 2025 14:36
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <igor.potjevlesch(a)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.potjevlesch@gmail.com<mailto:igor.potjevlesch@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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virus.www.avast.com<https://www.avast.com/sig-email?utm_medium=email&…
9:51 p.m.
Hello Henning,
Undertstood! Thank you. If there is nothing to do, we will move on the upgrade.
Regards,
Igor.
De : Henning Westerholt <hw(a)gilawa.com>
Envoyé : lundi 13 janvier 2025 17:20
À : 'Kamailio (SER) - Users Mailing List' <sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <igor.potjevlesch(a)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.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@gmail.com> >
Sent: Montag, 13. Januar 2025 15:12
To: Henning Westerholt <hw(a)gilawa.com <mailto:hw@gilawa.com> >; 'Kamailio
(SER) - Users Mailing List' <sr-users(a)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 <hw(a)gilawa.com <mailto:hw@gilawa.com> >
Envoyé : lundi 13 janvier 2025 14:36
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org> >
Cc : Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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/> https://skalatan.de/blog/
Kamailio services – <https://gilawa.com/> https://gilawa.com
From: Igor Potjevlesch via sr-users <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org> >
Sent: Montag, 13. Januar 2025 13:40
To: sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org>
Cc: Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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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<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
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10:47 p.m.
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(a)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 <hw(a)gilawa.com <mailto:hw@gilawa.com>>
Envoyé : lundi 13 janvier 2025 17:20
À : 'Kamailio (SER) - Users Mailing List' <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
Cc : Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@gmail.com>>
Sent: Montag, 13. Januar 2025 15:12
To: Henning Westerholt <hw(a)gilawa.com <mailto:hw@gilawa.com>>; 'Kamailio
(SER) - Users Mailing List' <sr-users(a)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 <hw(a)gilawa.com <mailto:hw@gilawa.com>>
Envoyé : lundi 13 janvier 2025 14:36
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
Cc : Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
Sent: Montag, 13. Januar 2025 13:40
To: sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org>
Cc: Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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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15 Jan
15 Jan
7:50 p.m.
Hello Olle,
Do you mean there is a scale limit? Maybe because the counter is 32bits counter?
Regards,
Igor.
De : Olle E. Johansson <oej(a)edvina.net>
Envoyé : mardi 14 janvier 2025 12:47
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc : Olle E Johansson <oej(a)edvina.net>et>; Henning Westerholt <hw(a)gilawa.com>om>;
Igor Potjevlesch <igor.potjevlesch(a)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(a)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 < <mailto:hw@gilawa.com> hw(a)gilawa.com>
Envoyé : lundi 13 janvier 2025 17:20
À : 'Kamailio (SER) - Users Mailing List' <
<mailto:sr-users@lists.kamailio.org> sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch < <mailto:igor.potjevlesch@gmail.com>
igor.potjevlesch(a)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 < <mailto:igor.potjevlesch@gmail.com>
igor.potjevlesch(a)gmail.com>
Sent: Montag, 13. Januar 2025 15:12
To: Henning Westerholt < <mailto:hw@gilawa.com> hw(a)gilawa.com>gt;; 'Kamailio
(SER) - Users Mailing List' < <mailto:sr-users@lists.kamailio.org>
sr-users(a)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 < <mailto:hw@gilawa.com> hw(a)gilawa.com>
Envoyé : lundi 13 janvier 2025 14:36
À : Kamailio (SER) - Users Mailing List < <mailto:sr-users@lists.kamailio.org>
sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch < <mailto:igor.potjevlesch@gmail.com>
igor.potjevlesch(a)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/> https://skalatan.de/blog/
Kamailio services – <https://gilawa.com/> https://gilawa.com
From: Igor Potjevlesch via sr-users < <mailto:sr-users@lists.kamailio.org>
sr-users(a)lists.kamailio.org>
Sent: Montag, 13. Januar 2025 13:40
To: <mailto:sr-users@lists.kamailio.org> sr-users(a)lists.kamailio.org
Cc: Igor Potjevlesch < <mailto:igor.potjevlesch@gmail.com>
igor.potjevlesch(a)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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7:56 p.m.
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-pro…
and here
https://stackoverflow.com/questions/2718283/definition-of-snmp-gauge32-vs-c…
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.potjevlesch(a)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 <oej(a)edvina.net <mailto:oej@edvina.net>>
Envoyé : mardi 14 janvier 2025 12:47
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
Cc : Olle E Johansson <oej(a)edvina.net <mailto:oej@edvina.net>>; Henning
Westerholt <hw(a)gilawa.com <mailto:hw@gilawa.com>>; Igor Potjevlesch
<igor.potjevlesch(a)gmail.com <mailto:igor.potjevlesch@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(a)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 <hw(a)gilawa.com <mailto:hw@gilawa.com>>
> Envoyé : lundi 13 janvier 2025 17:20
> À : 'Kamailio (SER) - Users Mailing List' <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
> Cc : Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@gmail.com>>
> Sent: Montag, 13. Januar 2025 15:12
> To: Henning Westerholt <hw(a)gilawa.com <mailto:hw@gilawa.com>>;
'Kamailio (SER) - Users Mailing List' <sr-users(a)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 <hw(a)gilawa.com <mailto:hw@gilawa.com>>
> Envoyé : lundi 13 janvier 2025 14:36
> À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
> Cc : Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
> Sent: Montag, 13. Januar 2025 13:40
> To: sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org>
> Cc: Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@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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7 comments
3 participants
participants (3)
-
Henning Westerholt -
Igor Potjevlesch -
Olle E. Johansson