Werk #11525: lnx_if: Treat only interfaces with UP and LOWER_UP (bracket info from ip address) as UP

Component

Checks & agents

Title

lnx_if: Treat only interfaces with UP and LOWER_UP (bracket info from ip address) as UP

Date

Jan 14, 2021

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.1.0b1	Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
2.0.0b5	Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
1.6.0p21	Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Previously we only checked <...,UP> in the bracket info and treated this interface as UP if and only if no output of ethtool is available.

Please have a look at the following scenarios and how we now determine whether an interface is UP:

<BROADCAST,MULTICAST,UP,LOWER_UP> means that this interface has a link and is UP
<NO-CARRIER,BROADCAST,MULTICAST,UP> means that this interface is configured and ADMIN UP but has no link
<BROADCAST,MULTICAST> means that this interface is not configured