If the data isn’t available, it’s likely because Cisco haven’t populated this MIB on that platform.

The sensors will be either from CISCO-ENTITY-SENSORS-MIB or from some other Cisco MIB.

Adam.

From: observium <observium-bounces@observium.org> On Behalf Of Storer, Darren via observium
Sent: 28 March 2019 22:26
To: Observium <observium@observium.org>
Cc: Storer, Darren <darren.storer@gmail.com>
Subject: Re: [Observium] Low dbm sensor alerts for shutdown interfaces

Hi Andrew,

Thanks for sharing this alert technique; I'm trying to recreate it. Is "All NOT Shut Ports" something that you have defined elsewhere?

Also, can you see dBm values from Cisco 3650 and 3850 SFPs? Here I can only see values returned from 6807 and Nexus family devices, Brocades return optical values too. Now that I check, I did see some 3650 SFP values a long time ago but only from one switch - very curious. 

Regards

Darren

On Thu, 28 Mar 2019 at 13:40, Andrew Lemin via observium <observium@observium.org> wrote:

Hey Luis,

Oh wow, yes please. Could you share it here in the list so that Adam can review it also?

If it makes sense and is not in conflict with other logic Adam may be able to integrate it J

For now this (see below) does seem to work.. And there are other far more important things to worry about (choose your battles etc ;) – For us our No1 missing-feature is being able to generate alerts when the [CDR] threshold is breached on an interface.

We have this fantastic mechanism for encoding the CDR’s on interfaces using ‘[]’, but no means of actually doing anything useful with it! L

We desperately want to kill of Cacti, but we cannot until Observium supports interface threshold alerting based on the interface description’s [CDR] value.

What do we have to do to make this happen Adam? It seems such a waste having [CDR] but not being able to use it?

Thanks again,

All the best, Andy.

From: Luis Balbinot <luis@luisbalbinot.com>
Sent: 28 March 2019 13:06
To: Observium <observium@observium.org>
Cc: Andrew Lemin <AndrewL@4d-dc.com>
Subject: Re: [Observium] Low dbm sensor alerts for shutdown interfaces

That bothered me too. I have a small patch for that if you want it. 

Luis

On Fri, Mar 22, 2019, 12:46 Andrew Lemin via observium <observium@observium.org> wrote:

Hi,

Has anyone else seen the issue where after enabling an alert checker for transceiver optics with sensor_value greater @sensor_limit and sensor_value less @sensor_limit_low, alerts are still received for shutdown interfaces?

For example, on a cisco switch when running ‘show interfaces transceiver detail’, we can see;

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Receive Power      Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

Te1/1/25   -40.0                 1.9        -1.0        -9.9      -13.9

Te2/1/1    -40.0                 1.9        -1.0        -9.9      -13.9

Etc..

Te1/1/25                       admin down     down

Te2/1/1                        admin down     down

Etc

The sensors page shows the correct thresholds etc, but shows the interface in Red (and hence is generating alerts through the checker), rather than grey (as the port is shutdown and has no fibre connected – hence -40dbm.).

The same port on the Ports page does show the interface as being grey/shutdown

Have no idea how to resolve this and stop getting transceiver alerts for shutdown interfaces? This sounds like a potential bug?

Thanks, Andy.

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