Interface problem "interface in crit (unknown)crit, speed: 1 gbit/s (assumed), in: 0.00 b/s (0%), out: 0.00 b/s (0%)"

[Kojsovman]

CMK version: Checkmk Enterprise Edition 2.3.0p36

Error message:

Interface		(unknown)CRIT, Speed: 1 GBit/s (assumed), In: 0.00 B/s (0%), Out: 0.00 B/s (0%)

Has already anybody facing this issue?

A lot of interfaces (but not all of them …) on different hosts goes to CRIT state and the output of the check in “unknown“ (I will expect that if the output is unknown status the check should goes also to Unknown )

When I try to perform “tabula rasa” on one of the hosts, affected interface check goes to OK status but the output stays the same (so basically “unknown” ) which isn’t right in my opinion.

Is there anything what can cause this issue? How should I fix-it?

[Yggy]

For your privacy maybe edit your post and remove the link to your Checkmk server?
If you can no longer edit, @Sara can help you out.

Regarding issue, I assume the interfaces were in use when initially discovered and now no longer in use? If so, any of the following suggested in the link might help you out.

Don't know what I have wrong

Seems like on the switch side the interface was discovered initially as being 100 MBps. While later it became 1 GBps. There are 3 ways that I know to rediscover that interface so it takes 1 GBps as correct value: In host configuration move interface from monitored to undecided service, apply changes, move interface back from undecided to monitored service. In this process it should keep history of the interface, but rediscover the current speed value as expected. Alternatively you can che…

[andreas-doehler (Andreas)]

@Kojsovman

Is there anything what can cause this issue? How should I fix-it?

The problem here is the state of you interface with “unknown”.

What says the HW/SW inventory of this port? What type of device is this?

[Sara]

Thank you for tagging me!

@Kojsovman I went ahead and removed the links to your URLs from the post for security reasons. If you would like to add something to the post to add some details (for example partial URL that does not contain the project name and so on), please let me know.

[Kojsovman]

@andreas-doehler

HW/SW inventory

Output form HW/SW inventory seems to be normal

Device type should be switch.

[andreas-doehler (Andreas)]

What i mean is this data inside the HW/SW inventory

How does it look like on your system?

[Kojsovman]

Yes I understand, but as we do not have any “name/summary“ for affected Interface I cannot identify which Interface is it in “HW/SW inventory” view.

a.k.a.

“summary“ of the interface is “unknown“ therefore we cannot link-it to Interface “description“ name in HW/SW inventory view.

[andreas-doehler (Andreas)]

If your interface has the number 382 as shown in your screenshot then you need to have a look at the HW/SW table with this interface id.

[Kojsovman]

@andreas-doehler

382

Nothing found based on Service/Interlace name (382) in HW/SW view

but fur example Interface 381 work properly and also cannot found based on Service/Interlace name, can be found based on service summary output :

[andreas-doehler (Andreas)]

The shown “unrouted VLAN 668” has the number 381 in front of its name in the HW/SW table.

If you have no ID 382 inside your table then someone has removed the VLAN definition.
I would strongly recommend to not monitor l2vlan interfaces as they don’t produce traffic data.