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Werk #14565: inv_if: Fix crash on innovaphone IP811

Component Checks & agents
Title inv_if: Fix crash on innovaphone IP811
Date Nov 10, 2022
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.1.0p17 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
2.0.0p31 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Previously, the inventory plugin inv_if would crash while inventorizing interfaces on a innovaphone IP811 with the message

Parsing of section inv_if failed

This could potentially happen on other devices, if they report 'NULL' to indicate missing values. With this werk, interfaces with this kind of missing information are omitted.

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