Interface Docker down

CMK version: 2.0.0p6
OS version: Debian 10

Error message:
Interface 1
[docker0], (down)CRIT , MAC: 02:42:C5:33:0B:63, Speed: unknown

how can I disable this Interface of docker or why does it throws this error?

Hallo,
you can disable checks

The interface has been up when you ran service discovery for that host. That state was taken as OK. It is now down → CRIT.

As an alternative to completely disabling the service, you could also create a rule in Setup > Services > Service monitoring rules > Network interfaces and switch ports that just sets both up and down as allowed operational states

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