Werk #19078: Fix rate calculation in clustered interface checks

Component	Checks & agents
Title	Fix rate calculation in clustered interface checks
Date	Jan 7, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.6.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.4.0p19 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Depending on the monitored device, clustered interface checks might have reported incorrect or missing rates. Note that this only affected clustered services using the native cluster mode.

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